[0001]The present disclosure, the press-molded article of manufacturing method and press apparatus.
BACKGROUND
[0002]For example, Japanese Patent No. 5079655 (Patent Document 1) and Japanese Patent Application Publication 2012-51005 (Patent Document 2), describes a process for producing the press molded product of a substantially U-shaped (groove shape) It is.
[0003]
　In the method of manufacturing the press-punch side pad protruding from the punch (hereinafter, also referred to as inner pad.) And the die-side pad protruding from the die bottom of die (hereinafter, also referred to as a die pad.) And de Material metal plate sandwiches, push the die to punch side in this state, forming a press-molded product. This suppresses the occurrence of spring back in the press molded articles.
[0004]
　In the method for producing the press molded product, when forming the vertical wall pushes the die to punch side, the punch-side pad protrudes from the punch. Therefore, between the shoulder and the punch shoulder part of the punch-side pad in the material metal plate, the slack portion (extra line portion) occurs. The slack portion (extra line portion) is slightly curved to the surface of the material metal sheet.
[0005]
　Then, the die-side pad and the die, further pushed into the punch side, forming the top plate of the press-molded product. At this time, part of the material metal sheet bent by the shoulder of the punch, the vertical wall is pushed out toward the proximal end side of the vertical wall. Accordingly, the base end portion of the vertical wall of the press-molded product after demolding first moment towards the inside of the press-molded product is produced (see arrows in FIG. 5 of Patent Document 2 (b)).
[0006]
　Also, the slack portion (extra line portion) is eventually crushed by the punch and the die, the slack portion before being crushed (extra line portion) is slightly curved in a convex to the surface of the material metal sheet It is deformed. Thus, the widthwise ends of the top plate in the release after the press-molded product (see arrows in FIG. 5 of Patent Document 2 (b)) produced a second moment toward the inside of the press-molded product.
[0007]
　Then, the ridgeline portion of the press-molded product after mold release, (see arrows in FIG. 5 of Patent Document 2 (b)), but the third moment toward the outside of the press-molded product occurs, the third moment offset by the first and second moments, it is possible to suppress the spring back in press-formed product.
Summary of the Invention
Problems that the Invention is to Solve
[0008]
　However, in the method of manufacturing the press-molded article, as the amount of protrusion of the punch of the punch-side pad increases, both of the first and second moment increases. Accordingly, the amount of vertical wall is displaced inward (amount corresponding to spring-go) also increases. Therefore, with respect to the amount of projection of the punch of the punch-side pad, the dimensions of the vertical wall changes sensitively in the width direction.
[0009]
　Thus, the dimensions of the vertical wall in the width direction, a relatively narrow range of the amount of protrusion of the punch-side pad can be made to fall within the tolerance set. Therefore, it is necessary to press molding to accurately adjust the amount of projection of the punch-side pad. Therefore, in the manufacturing method of the press-molded product, it is desirable that the dimensions of the vertical wall also to expand the range of the amount of protrusion of the punch-side pad can be formed a press molded article falls within the tolerance.
[0010]
　The present disclosure includes aims to consideration of the aforementioned, to provide a manufacturing method and a press apparatus of a press molded article that can ensure the dimensional accuracy of the press-molded product even expand the scope of the protruding amount from the punch inner pad to.
Means for Solving the Problems
[0011]
　Method for producing a press-molded article for solving the above, a punch having a inner pad at the top, and a die having a die pad, wherein arranged in the inner pad facing, by comprise configured press apparatus, from the material metal plate, a top plate, a pair of ridge portions located on both sides in the width direction of the top plate, and a pair of vertical walls extending to the thickness direction one side of the top plate from said ridge portion, a a method for manufacturing a press molded article having, the said material metal plate thickness direction on one side of and the material metal sheet is projected to the die side with the inner pad-side from the punch the inner pad inner pad while arranged above were separated and the die pad is projected to the die pad from the die to the punch side by a plate larger predetermined distance than the thickness of the material metal plate from the inner pad position A first step of placing, the said die die pad, to form the said vertical wall by the inner pad, and the die and the punch are moved relative to the punch side with respect to the punch, the die pad and the die comprising a second step of integrally, and a third step of forming the top plate are moved relative to said said die and said die pad being integral inner pad to the punch side with respect to the punch ing.
[0012]
　According to the manufacturing method of the press-molded product to solve the above problems, to produce a press-molded product using a material metal sheet. The press molded article, comprises a top plate, a pair of ridge portions located on both sides in the width direction of the top plate, and a pair of vertical walls extending from the ridge to the thickness direction on one side of the top plate, the there.
[0013]
　Then, in the first step, inner pad protrudes from the punch to the die side, and a thickness direction one side of the material metal sheet to the inner pad side, placing the material metal plate on inner pad. Further, the die pad is located a predetermined distance is spaced greater than the thickness of the material metal sheet protrudes, the die pad with respect to the inner pad to the punch side of the die.
[0014]
　In the second step, the die, die pad and relatively moved punch side with respect to the inner pad, and a punch, to form a vertical wall the material metal plate by the die and punch, to integrate the die pad and die. Furthermore, in the third step to form the die and the die pad that is integrated, the top plate material metal plate is relatively moved punch side and inner pad against the punch. Thus, the press-molded product is molded.
[0015]
　Thus, in the manufacturing method of the present disclosure of the press-molded product, arranged by separating the die pad with respect to the inner pad by larger predetermined distance than the thickness of the material metal sheet. In this state, die, die pad, inner pad, and move relatively to the punch side to form a vertical wall in the material metal plate with respect to the punch. Therefore, the press-molded product after molding, it is possible to suppress the occurrence of the second moment described above.
[0016]
　That is, the die in the second step moves relative to the punch side, when pressing the material metal sheet on both shoulders of the die (the edge of the die hole), die pad are spaced apart by a predetermined distance with respect to the inner pad there. This makes it possible to produce while adjusting the bending of the die pad side of the portion between the die pad and the inner pad material metal plate.
[0017]
　Thus, for example, as the deflection in the portion between the die pad and the inner pad material metal sheet is made of an elastic region, by setting the predetermined distance, a portion corresponding to the slack portion of the material metal sheet possible to suppress the plastic deformation into a curved shape. Thus, in the release after the press-molded product, it is possible to suppress the generation of the second moment described above.
[0018]
　That is, the moment generated in the press-primarily due to the first moment towards the inside of the press-molded product at the proximal end of the vertical wall, and a third moment toward the outside of the press-molded product in the ridge portion can. In other words, to suppress the effect of the second moment relative to the amount of displacement of the longitudinal wall in the width direction, only predominantly first moment, it is possible to adjust the amount of displacement of the longitudinal wall in the width direction.
[0019]
　Thus, with respect to the amount of projection of the punch of the inner pad, opening the vertical wall of the press-molded product it can be suppressed that (angle of the shoulder portion (ridge portion 10B)) changes sensitively, from a punch of the inner pad it is possible to enlarge the range of the protrusion amount. As a result, as the amount of projection of the inner pad is large, it can be suppressed phenomenon that the amount of displacement of the inner press-molded product in the longitudinal wall becomes extremely large. Therefore, it is possible to expand the protrusion amount in the range of from the punch of the inner pad, forming a press-molded article the dimensional accuracy of the vertical wall is maintained within tolerances. That facilitates the management of the amount of protrusion of the punch of the inner pad pressing device.
Effect of the invention
[0020]
　According to the manufacturing method of the present disclosure of the press-molded product, even if a larger protrusion amount in the range of from the punch of the inner pad can be secured dimensional accuracy of the press-molded product.
BRIEF DESCRIPTION OF THE DRAWINGS
[0021]
[Figure 1A] Figure 1A shows a first step in the method of manufacturing a press molded part according to the first embodiment, a cross-sectional view as seen from the front of the press.
FIG 1B] Figure 1B is a block diagram of a control unit for controlling the operation of the mobile device and the pad pressing device shown in Figure 1A.
[Figure 2A] Figure 2A shows a second step in the method of manufacturing a press molded part according to the first embodiment, a cross-sectional view as seen from the front of the press.
[Figure 2B] Figure 2B is relative movement from the state shown in FIG. 2A die to punch side showing a state in which integration of the die and the die pad, a cross-sectional view as seen from the front of the press.
[Figure 3A] Figure 3A is a die and die pad from the state of FIG. 2B shows a state that has moved further relative to the punch side, a cross-sectional view as seen from the front of the press.
[Figure 3B] Figure 3B shows a state in which to reach the bottom dead center of the die and the die pad from the state of FIG. 3A, a sectional view as seen from the front of the press.
FIG. 4 shows a press-molded product molded by the press apparatus of FIG. 1A, a sectional view as seen from the front.
FIG. 5 is a cross-sectional view of the material metal sheet pre processing is performed from the front.
[Figure 6A] Figure 6A shows a first pre-processing step of performing pre-processing the material metal sheet is a sectional view as seen from the front of the press.
[Figure 6B] Figure 6B shows a second pre processing step of performing pre-processing the material metal sheet is a sectional view as seen from the front of the press.
FIG. 7 is the end of the second step of the method of the press-molded product prepared in Comparative Example, a sectional view showing the periphery of a shoulder portion of the punch.
[8] FIG. 8 is a sectional view for explaining a moment generated around the ridge portion in the press-molded product.
[9] FIG. 9 is a cross section of the enlarged vicinity of the shoulder portion of the punch of Figure 2A.
[10] FIG 10 is a graph showing the amount of protrusion of the punch of the inner pad, the relationship between the shift amount of the vertical wall to the configuration dimensions.
[11] Figure 11 shows a dimensional relationship of the press molded article using in obtaining the simulation result shown in the graph of FIG. 10 is a sectional view viewed from the front.
[12] FIG. 12 shows a state of the first step in the method of manufacturing press-molded part according to the second embodiment, a sectional view as seen from the front of the press.
FIG 13A] FIG 13A shows a state of the second step in the method of manufacturing press-molded part according to the second embodiment, a sectional view as seen from the front of the press.
FIG 13B] FIG 13B is relative movement from the state shown in FIG. 13A the die to punch side showing a state in which integration of the die and the die pad, a cross-sectional view as seen from the front of the press.
[Figure 14A] Figure 14A is a die and die pad from the state of FIG. 13B shows a state that has moved further relative to the punch side, a cross-sectional view as seen from the front of the press.
FIG 14B] FIG 14B shows a state in which to reach the bottom dead center of the die and the die pad from the state of FIG. 14A, a sectional view as seen from the front of the press.
[15] FIG. 15 shows an example of a variant of the pressing device shown in Figure 1A, a sectional view as seen from the front of the press.
[16] FIG. 16 shows an example of adding a stopper to press apparatus shown in FIG. 1A, an enlarged cross-sectional view.
[17] FIG. 17 is a sectional view as seen from the front of the press apparatus to the relative movable stopper shown in FIG. 16 relative to the inner pad.
FIG. 18 is a press apparatus shown in FIG. 17 is a sectional view showing a state in which the die and the die pad to reach a bottom dead center.
DESCRIPTION OF THE INVENTION
[0022]
(First Embodiment)
　Hereinafter, with reference to FIGS. 1 to 11, a method for manufacturing a press molded article according to the first embodiment. In the manufacturing method of the press-molded product, the material metal sheet 20 is formed into a press-molded product 10, which is the final molded article. Material metal plate 20 used in this first embodiment, pre-processing is given.
[0023]
　Hereinafter, first described configuration of the press-molded product 10, then pre-processing of the material metal plate 20, and a manufacturing method of the press-molded product will be described. Note that like the same members in the drawings are denoted by the same reference numerals, those described above for the same parts in the following discussion are appropriately omitted.
[0024]
(For the press molded product 10)
　with reference to FIG. 4, the configuration of the press-molded product 10. The arrow W shown in FIG. 4 indicates the width direction of the press-molded product 10, arrow A denotes the upper side of the press-molded product 10, an arrow B indicates the bottom of the press-molded product 10. Arrows A and B show the pressing direction.
[0025]
　Press-molded article 10 is, for example, tensile strength is composed of more high-strength steel sheet 440 MPa. Spring back as the tensile strength increases will be actualized. The press-molded product 10 is used, for example, as a vehicle body frame member having a substantially elongate constituting the skeleton of the car. The press-molded product 10 is viewed from the front of one longitudinal side, cross section is formed in a substantially hat shape.
[0026]
　Specifically, the press molded article 10 includes a top plate 10A which extends in the width direction of the press-molded product 10, a pair of ridge lines curved in an arc shape that is convex to the adjacent and surface in the width direction at both ends of the top plate 10A and a part 10B. Moreover, the press molded article 10 includes a pair of vertical walls 10C extending from the ridge portion 10B to the rear surface side is a thickness direction one side of the top plate 10A, and adjacent to the distal end of the pair of vertical walls 10C (bottom) and a pair of ridge portions 10D which is arcuately curved to be convex to the back surface side. Furthermore, the press-molded product 10 has a pair of flanges 10E respectively extending from the pair of ridge portions 10D in the width direction on both sides of the top plate 10A (the surface side of the vertical wall 10C).
[0027]
　In the following description, a thickness direction one side of the press-molded product 10 to the back surface side is the inside of the press-molded product 10, the plate thickness direction other side is the front side of the press-molded product 10 of the press-molded product 10 and outside. As described above, the pair of ridge portions 10B forms a boundary between the top plate 10A and the vertical wall 10C, the bending portion is convex to the outside of the press-molded product 10 in front view.
[0028]
(For pre processing of the material metal plate 20)
　will be described below pre processing of the material metal sheet 20. In the following description, to distinguish the material metal plate after the material metal plate and pre processing prior to pre processing, reference numeral 20 the material metal plate before pre processing, the material metal plate after pre processing It is denoted by the numeral 22. Material metal plate after pre processing of the intermediate molded article 22.
[0029]
　First, referring to FIG. 5, the configuration of the intermediate molded article 22 after pre processing. The arrow W shown in FIG. 5 indicates the width direction of the intermediate molded article 22, arrow A denotes the upper side of the intermediate molded article 22, an arrow B indicates the bottom of the intermediate molded article 22. Then, the width direction of the width direction and a press-molded article 10 of the intermediate molded article 22 is matched, the vertical direction in the vertical direction and the press-molded product 10 of the intermediate molded article 22 is matched.
[0030]
　As shown in this figure, the intermediate molded article 22, the portion corresponding to the ridge portion 10D and the flange 10E of the press-molded product 10 is formed in advance. That is, the intermediate molded article 22 is a sectional view as seen from the front, is formed in a substantially U-shape which is open upward. Specifically, the intermediate molded article 22 has a body portion 22A which forms a width direction intermediate portion of the intermediate molded article 22, a ridge portion 22D corresponding to the ridge portion 10D adjacent to both widthwise ends of the main body portion 22A, the flange 10E and a flange 22E corresponding to.
[0031]
　6A and 6B are views showing a press apparatus 30 for pre processing, the press device 30 performs a pre-processing the material metal plate 20. In FIG. 6A and 6B, the arrow W is the width direction of the pressing device 30, the arrow A as the device upper pressing device 30, the device below the pressing device 30 the arrow B. Then, the width direction of the width direction and the intermediate molded article 22 of the pressing device 30 are the same, the vertical direction of the vertical direction of the apparatus and the intermediate molded article 22 of the press 30 matches.
[0032]
　Pressing device 30 includes a punch 32 of the apparatus upper part of the pressing device 30, and a die 34 constituting the device lower part of the press apparatus 30. Further, the die 34 is provided with a pad 36 arranged in the widthwise central portion of the die 34.
[0033]
　Punch 32 includes a main body portion 22A of the intermediate molded article 22, the ridge line portion 22D, and a molding surface corresponding to the shape of the surface side of the flange 22E. Further, the punch 32 is the moving device 38 is coupled, the mobile device 38 may be a hydraulic device, an electric drive apparatus or the like as an example. Thus, the punch 32 is moved to a direction and away from the direction toward the die 34 by the mobile device 38 vertical direction of the apparatus (pressing direction).
[0034]
　Die 34 has a molding surface corresponding to the back surface side of the shape of the ridge line portion 22D and the flange 22E of the intermediate molded article 22. Further, the widthwise central portion of the die 34, the recess 34A for accommodating the pad 36 is formed, the concave portion 34A is opened to the device upper is punch 32 side.
[0035]
　Pad 36 is placed in the apparatus below the punch 32, the upper surface of the pad 36 is perpendicular to the vertical direction of the apparatus. The pad 36 is connected to the die 34 by the pad pressure device 39, the pad pressure device 39 may be, for example, a gas cushion, a hydraulic device, a spring, an electric drive apparatus or the like. Thus, the pad 36 is relatively moved in the vertical direction of the apparatus with respect to the die 34 (pressing direction) by the pad pressure device 39. Pad 36 is in the bottom dead center of the pad 36 to be closest to the die 34, the pad 36 is housed in the recess 34A of the die 34 (see FIG. 6B).
[0036]
　Next, a description will be given pre processing step of performing pre-processing the material metal plate 20 by a press device 30. This pre processing, as shown in FIG. 6A, holds the pad 36 in a state of being protruded to the device upward relative to the die 34 by the pad pressing device 39 (state in which the upper surface of the die hole pad 36 is projected) sets the material metal plate 20 on the pad 36. Further, the mobile device 38 punch 32 is moved to the device lower approaching the pad 36, the widthwise central side of the portion of the material metal sheet 20 by punching 32 and the pad 36 for pressurizing 圧狭 lifting.
[0037]
　Then, the material metal sheet 20 with pressurized 圧狭 lifting state by the punch 32 and the pad 36, the mobile device 38, is relatively moved to the device lower against the punch 32 die 34. Pad 36 also punches 32 and while pressurization clamping element metal plate 20 in the pad 36, is pushed by the punch 32 moves relative to the apparatus bottom side of the die 34. As shown in FIG. 6B, the punch 32 and the pad 36 reaches the bottom dead center, material metal plate 20 is pressurized 圧狭 lifting in the corners of the die hole of the punch shoulder and the die 34 of the punch 32 (base angle portion) that. Accordingly, the pair of ridge portions 22D and the flange 22E of the intermediate molded article 22 is formed. Thus, shaping the material metal plate 20 to the intermediate molded article 22 which pre processing is performed.
[0038]
(Method for producing the press molded product 10)
　Next, a method for manufacturing a press molded article 10. In the manufacturing method of the press-molded product 10, using a pressing device 40, molding the intermediate molded article 22 which pre processing is performed in the press-molded article 10. First, with reference to FIGS. 1 to 3 will be described a press apparatus 40.
[0039]
　The arrow W shown in FIGS. 1 to 3 show a width direction of the pressing device 40, an arrow A shows the device upper press unit 40, an arrow B indicates the device below the press apparatus 40. Then, coincident with the width direction of the width direction and a press-molded article 10 and the intermediate molded article 22 of the press 40, the vertical direction of the vertical direction of the apparatus (pressing direction) and the press-molded article 10 and the intermediate molded article 22 of the press 40 door matches.
[0040]
　Pressing device 40 includes a die 42 constituting the apparatus upper part of the pressing device 40, and a punch 46 which constitute the device lower part of the press 40. The die 42 and the punch 46 is disposed to face the vertical direction of the apparatus.
[0041]
　The widthwise central portion of the die 42, the recess 42A is an example of a die hole which is open to the apparatus bottom is formed. In the recess 42A, the die bottom 42D that faces the top 46C of the punch 46 is formed in the device above. The die bottom 42D, the pad housing portion 42B is formed, which is an example of the die pad accommodating portion. Pad housing portion 42B is a concave that is open to the device bottom. Pad accommodating portion 42B accommodates the die pad 44 to be described later. Inner peripheral surface except the pad housing portion 42B in the recess 42A, the width direction side portions of the top plate 10A of the press-molded product 10, a ridge portion 10B, the vertical wall 10C, the molding surface corresponding to the surface of the ridge portion 10D.
[0042]
　On both sides of the die bottom 42D, the base angle portion 42E corresponding to the shoulder 46D of the punches 46 (described later) is formed. Punch a part and a part of the die corresponding, it is meant that a portion part of the die facing the punch in the forming bottom dead center. Base angle portion 42E is a shaped surface corresponding to the ridge portion 10B of the press-molded product 10. The base angle portion 42E is preferably a shoulder portion 46D and the irregularity of the punch 46 has a shape inverted. From the bottom corners 42E, the die hole walls 42F corresponding to the punch wall 46E of the punch 46 extends.
[0043]
　The die bottom 42D of the die 42, the inclined surface 42C is formed from the base angle section 42E, which is an example of a die-side inclined surface which projects punch 46 side toward the pad housing portion 42B. The inclined surface 42C is adjacent to both sides in the width direction of the pad housing portion 42B.
[0044]
　Further, the die 42 is connected to the mobile device 50. Mobile device 50 may be, for example, a hydraulic system, an electric drive apparatus or the like. The mobile device 50 is connected to the control unit 56 (see FIG. 1B). Control unit 56 operates the mobile device 50, to move the die 42 to the vertical direction of the apparatus in the mobile device 50. Thus, the die 42 is relatively moved in the direction or away direction approaching the punch 46. Further, when bringing the die 42 to punch 46, both shoulder portions 42G of the die 42 abuts the intermediate molded article 22.
[0045]
　The widthwise central portion of the die 42, the die pad 44 is provided. The die pad 44 is formed in a substantially rectangular parallelepiped block shape in cross section as viewed from the front. The die pad 44 includes a bottom surface 44A which is an example of the inner pad surface facing the upper surface 48A of the inner pad 48. The lower surface 44A, if there is unevenness in the shape of the top plate of the press-molded product, irregularities are provided corresponding to the shape of the press-molded product.
[0046]
　The die pad 44 is connected to the die 42 by the pad pressing device 52 is an example of the second coupling device. Pad pressing device 52 may be, for example, a hydraulic system, an electric drive apparatus or the like. Pad pressing device 52 is connected to the control unit 56 (see FIG. 1B). Control unit 56 operates the pad pressing device 52. Pad pressing device 52, the die pad 44 is relatively moved in the vertical direction of the apparatus with respect to the die 42, to move the die pad 44 to the pressing direction. Thus, the control unit 56 changes the distance between the pressing direction of the die pad 44 and the die 42 by the pad pressure device 52.
[0047]
　Controller 56 controls the relative position of the die pad 44 to the die 42. Thus, the control unit 56 controls the relative position of the die pad 44 relative to the inner pad 48 to be described later. Then, in a state in which the die pad 44 closest to the die 42, the die pad 44 is housed in the pad receiving portion 42B (see FIG. 2B). In a state accommodating the die pad 44 in the pad receiving portion 42B, the lower surface 44A of the die pad 44 is located in the device above the opening surface of the pad housing portion 42B, the lower surface 44A do not protrude from the pad receiving portion 42B to the device bottom (recessed).
[0048]
　Punch 46 is positioned on the apparatus below the die 42 and the die pad 44, facing the die 42 and the die pad 44 in the vertical direction of the apparatus. Punch 46 is a sectional view as seen from the front, it is formed in a convex shape projecting to the device upper side. The outer surface of the punch 46 is a shaped surface corresponding to the back surface of the press widthwise side portions of the top plate 10A of the molded article 10, the ridge line portion 10B, the vertical wall 10C, ridge portions 10D, and the flange 10E.
[0049]
　Punch 46 includes a top portion 46C which forms the upper surface of the punch 46 across the pressing direction. Pad accommodating portion 46B is formed, which is an example of the inner pad housing portion in the top 46C. On both sides of the top 46C, a shoulder portion 46D is formed, which is an example of the punch shoulder. From each shoulder 46D, punch the wall 46E is extended.
[0050]
　The top 46C of the punch 46, the inclined surface 46A is formed, which is an example of the punch-side inclined surface that is recessed toward the respective shoulder portions 46D to the pad receiving portion 46B. The inclined surface 46A is opposed to the inclined surface 42C and vertical direction of the apparatus of the die 42. That is, the inclined surface 46A is parallel to the inclined surface 42C, sloping to the device lower as it goes from the shoulder portion 46D of the punch 46 to the lateral center side.
[0051]
　Pad housing portion 46B is a concave opening toward the device upward. Pad accommodating portion 46B accommodates the inner pad 48 to be described later. On both sides of the pad housing portion 46B, the inclined surface 46A is adjacent.
[0052]
　Further, the widthwise central portion of the top end 46C of the punch 46, inner pad 48 is provided. Inner pad 48 has a substantially rectangular parallelepiped block shape in cross section as viewed from the front. The inner pad 48 is connected to the punch 46 by the pad pressure device 54 which is an example of the first connecting device. Pad pressing device 54 may be, for example, a hydraulic system, an electric drive apparatus or the like.
[0053]
　Pad pressing device 54 is connected to the control unit 56 (see FIG. 1B). Control unit 56 operates the pad pressing device 54, the pad pressure device 54 is moved relative the inner pad 48 to the vertical direction of the apparatus with respect to the punch 46. Thus, the control unit 56 changes the distance between the pressing direction of the inner pad 48 and the punch 46 by the pad pressure device 54.
[0054]
　That is, the control unit 56 controls the relative position of the inner pad 48 against the punch 46. Inner pad 48 is in a state closest to the punch 46, is housed in the pad receiving portion 46B (see FIG. 3B).
[0055]
　Inner pad 48 is disposed opposite to the die pad 44 vertical direction of the apparatus. Inner pad 48 comprises a top surface 48A, which is an example of the inner pad top surface. Top 48A is parallel to the bottom surface 44A of the die pad 44. Similar to the upper surface 48A the lower surface 44A, if there is unevenness in the shape of the top plate of the press-molded product, irregularities are provided corresponding to the shape of the press-molded product. Width of the inner pad 48 is consistent with the width of the die pad 44. In the state of accommodating the inner pad 48 in the pad receiving portion 46B, the upper surface 48A of the inner pad 48 is the opening surface flush the pad receiving portion 46B (see FIG. 3B). Therefore, in a state accommodating the inner pad 48 in the pad receiving portion 46B, the top 46C of the punch 46 including the inner pad 48 is a concave shape that is recessed to the device bottom.
[0056]
　Weight recess at the top 46C of the punch 46 shows a vertical dimension from the shoulder 46D of the punch 46 in the vertical direction of the apparatus to the upper surface 48A of the inner pad 48. The recess amount when releasing the press-molded product 10 from the press apparatus 40, the top plate 10A of the press-molded product 10 is set as appropriate so that the flat (tabular). That is, the amount of indentation at the top 46C of the punch 46 is appropriately set by simulation or the like in accordance with the tensile strength and the plate thickness and the like of the material metal plate used for press forming 10.
[0057]
　Here, as shown in FIGS. 1A and 9, in the first step to the third step in the method of manufacturing the press-molded article to be described later, the control unit 56 operates the pad pressing device 52, 54, inner die pad 44 retaining only device upper predetermined distance H1 against the pad 48. Predetermined distance H1 is greater than the thickness of the intermediate molded article 22, the gap between the lower surface 44A of the intermediate molded article 22 and the die pad 44 is free. Note that the predetermined distance H1, will be described later. Further, reference numeral 48C denotes a shoulder 48C of the inner pad 48.
[0058]
　Next, a method for manufacturing a press molded article 10. Method for producing a press-molded product 10 includes first to third steps described below.
[0059]
　As shown in FIGS. 1A and 1B, in the first step, to operate the pad pressing apparatus 54 by the control unit 56, and the inner pad 48 in the pad pressing device 54 is protruded from the pad receiving portion 46B to the device upper side It is held in a state. Inner pad 48 projecting amount H2 projecting from the shoulder portion 46D of the punch 46. In this state, it sets the back surface of the intermediate molded article 22 on the top surface 48A of the inner pad 48. Then, by operating the pad pressing apparatus 52 by the control unit 56, placing the die pad 44 to the device upper side of the intermediate molded article 22 to the die pad 44 in the pad pressing device 52 moves from the pad receiving portion 42B to the device bottom. At this time, to hold the die pad 44 in a state of being spaced apart by a predetermined distance H1 with respect to the inner pad 48. Thus, a gap between the lower surface 44A of the intermediate molded article 22 and the die pad 44 is free.
[0060]
　In the second step, to operate the mobile device 50 and the pad pressing apparatus 52 by the control unit 56, a die 42, from the state shown in FIG. 1A, the die pad 44, device lower with respect to the inner pad 48, and the punch 46 relatively moving the (punch 46 side) (see FIG. 2A). In this case, maintaining between the die pad 44 and the inner pad 48 to a predetermined distance H1, while maintaining the relative positional relationship between the die pad 44 and the inner pad 48 in the vertical direction of the apparatus, to move the die 42 to the device bottom. Thus, the punch 46 is pushed into the recess (die hole) in 42A of the die 42, the vertical wall 10C of the press-molded product 10 is molded.
[0061]
　The intermediate molded article 22 is pushed to the device bottom by both shoulders 42G of the die 42. The width direction central side portions of the intermediate molded article 22 located between portions abutting on both shoulders 42G of the die 42 is deflected curved convex to the device upper side. And portions flexing the flexed portion to the convex 24 (see FIG. 2A).
[0062]
　At this time, the back surface of the flexible portion 24 comes into contact with the both shoulder portions 46D of the shoulder 48C and the punch 46 of the inner pad 48, the surface of the flexible portion 24 is brought into contact with the lower surface 44A of the die pad 44.
[0063]
　In the following description, as shown in FIG. 9, the portion between the two shoulders 48C of the inner pad 48 in the deflection unit 24 and the first bending portion 24A. Further, the contact portions at both shoulder portions 48C of the inner pad 48 and second flexures 24B, the part between the shoulder 48C and the punch 46 of the inner pad 48 and the third flexure 24C.
[0064]
　In the present embodiment, in the second step, so as to suppress the plastic deformation of the third bending portion 24C of the flexure 24, the dimensions of the predetermined distance H1 is being set. More specifically, the predetermined distance H1 is set to the maximum dimension of the first bending portion 24A can be bent by the elastic region.
[0065]
　In the prior art, in a second step, not to separate the die pad 44 to the intermediate molded article 22. In this case, the intermediate molded article 22 is pressurized 圧狭 lifting with the die pad 44 and the inner pad 48. In this state, push the punch 46 into the recess 42A of the die 42, when forming a vertical wall 10C of the press-molded product 10, the deflection of the device the upper side of the first bending portion 24A is not allowed. As a result, since the second bending portion 24B bending the third bending portion 24C and only concentrates, third flexure 24C are bent to the device lower the second bending portion 24B as a starting point, the intermediate molded article 22 it is likely to plastically deform slightly curved state so as to project to the surface side.
[0066]
　In contrast, in the present embodiment, since the die pad 44 is separated from the intermediate molded article 22, the deflection of the device the upper side of the first bending portion 24A is permitted, the first bending portion 24A and the second since the bending portion 24B and the bent across flexures 24 and the third bending portion 24C, bending of the third bending portion 24C is smaller than the above case. Moreover, the predetermined distance H1 is first bending portion 24A is set to the maximum dimension which can be deflected in an elastic region. Thus, deflection of the third bending portion 24C is further reduced, it can suppress plastic deformation of the third flexure 24C.
[0067]
　The predetermined distance H1 is, the tensile strength and sheet thickness and the material metal plate 20, inner pad 48, and the width dimension of the punch 46, based on the projection amount H2 etc. of the inner pad 48 from the shoulder 46D of the punches 46, It is set appropriately by simulation or the like.
[0068]
　Then, in the second step, as shown in FIG. 2B, to move the die 42 to the device lower until the die pad 44 is housed in the pad receiving portion 42B, the die 42 and the die pad 44 are integrated. Thus, the die pad 44 becomes relatively immovable state to the device on the direction relative to the die 42. In the present specification, the die pad and the die are integrated means that the die pad 44 to move relative a condition not to the device on the direction relative to the die 42.
[0069]
　When the die pad and die are integrated, the lower surface 44A of the die pad 44 does not protrude from the pad receiving portion 42B to the device bottom, it is housed in the pad receiving portion 42B. Further, flexure 24 of the intermediate molded article 22 is sandwiched between the lower end portion 42H and the inner pad 48 to the width direction inside end portion of the inclined surface 42C of the die 42 is formed.
[0070]
　In the third step, to operate the mobile device 50 by the controller 56, it moves to the integral die 42 and further devices lower the die pad 44 is pushed to the punch 46 side. At this time, by operating the pad pressing apparatus 54 by the control section 56 while maintaining the relative positional relationship between the die pad 44 and the inner pad 48 in the vertical direction of the apparatus, the inner pad 48, device lower with the die 42 and the die pad 44 to move to. Thus, most of the inner pad 48 is housed in the pad receiving portion 46B (see FIG. 3A). At this time, the deflection unit 24 of the intermediate molded article 22, as will become flat (tabular), accommodates the inner pad 48 in the pad receiving portion 46B. Thus, returning the deflected flexure 24 so as to project into the device upward, the die 42 and the inner pad 48 with flat (tabular).
[0071]
　Then, to operate the mobile device 50 by the controller 56, the die 42 and the die pad 44 are integrated, to reach the bottom dead center and further moves to the device lower in the mobile device 50 from the state shown in Figure 3A. At this time, by operating the pad pressing apparatus 54 by the control section 56 while maintaining the relative positional relationship between the die pad 44 and the inner pad 48 in the vertical direction of the apparatus, the inner pad 48, device lower with the die 42 and the die pad 44 navigate to, it accommodates the entire inner pad 48 in the pad receiving portion 46B (see FIG. 3B).
[0072]
　Thus, as the portion corresponding to the top plate 10A of the intermediate molded article 22 is warped in a convex back surface side of the intermediate molded article 22 (inner press-formed product 10), the intermediate product 22 in the die 42 and the punch 46 pressurized 圧狭 to equity. Specifically, the flexure 24 with pressurized 圧狭 lifting the inclined surface 46A of the inclined surface 42C and the punch 46 of the die 42, bent back second flexure portion 24B in the bending portion 24. Then, obtain a press-molded product 10 having a flat top plate 10A by releasing the press-molded product 10 from the press apparatus 40.
[0073]
　Next, the operation and effect of this embodiment will be described in comparison with the manufacturing method of the comparative examples described in the background art. First, a method for manufacturing a press molded article in Comparative Example. In the method of press-molded product produced in Comparative Example, similarly to the present embodiment, forming a press-formed product 10 by using the intermediate molded article 22.
[0074]
　Figure 7 is an enlarged view of the periphery of the shoulder 46D of the punch 46 in the press apparatus of a comparative example. In FIG. 7, in the press device of the comparative example, the portion that is configured similarly to the present embodiment are denoted by the same reference numerals. Moreover, a press device of the comparative example, a portion corresponding to the inclined surface 46A of the inclined surface 42C and the punch 46 of the die 42 of this embodiment is orthogonal to the vertical direction of the apparatus.
[0075]
　In the first step of Comparative Example, unlike the first step of the present embodiment, when moving the die pad 44 in the pad pressing device 52 to the device bottom, pressurizing the intermediate product 22 in the die pad 44 and the inner pad 48 It is sandwiched. That is, in the first step of the comparative example, is not empty gap between the intermediate molded article 22 and the die pad 44.
[0076]
　Then, in the second step of the comparative example, in this state, push the die 42 to punch 46 side, forming a portion corresponding to the vertical wall 10C of the press-molded product 10. At this time, the inner pad 48 protrudes to the die 42 side with respect to the punch 46. Therefore, the portion from the shoulder portion 48C of the inner pad 48 in the intermediate molded article 22 to the shoulder portion 46D of the punches 46 (hereinafter: slack portion 26) is bent at an angle to the device lower toward the outside in the width direction of the pressing device . Specifically, the slack portion 26 is plastically deformed into a slightly curved state so as to project to the surface side of the intermediate molded article 22.
[0077]
　The length along the slack portion 26 L1 is longer than the length L2 between the shoulder 46D of the inner pad 48 and the punch 46 in the width direction. Therefore, from the state of FIG. 7, by moving the die 42 and the die pad 44 to the bottom dead center, the die 42 and the die pad 44, when the slack portion 26 in the punch 46 pressing 圧狭 to lifting, shoulder 46D of the punches 46 bent portion by (a portion shown in FIG. 7), is pushed out to the device bottom, a part of the vertical wall 10C. Further, the inner pad 48 side portion of the slack portion 26 (b portions shown in FIG. 7) is the crushed, becomes part of the top plate 10A.
[0078]
　That is, as shown in FIG. 8, the press-formed product 10 of Comparative Example, the a portion forms a base end portion of the vertical wall 10C, the b unit forms a widthwise side portion of the top plate 10A . Then, a portion which is pushed into the vertical wall 10C side, after being bent arcuately that is convex to the outside of the press-molded product 10 by a shoulder portion 46D of the punches 46, are bent back as the vertical wall 10C. Therefore, the press-formed product 10 after the release, and to return to the state in which a portion of the press-molded product 10 is bent in an arc. Thus, the a portion of the press-molded product 10, (see arrow M1 in FIG. 8) first moment towards the inside of the press-molded product 10 is produced.
[0079]
　Further, b portion of the slack portion 26 is, after deformed slightly curved state so as to be convex to the outside of the press-molded product 10 (the surface side of the intermediate molded article 22), a flat shape as a top plate 10A (bending is returned). Therefore, the press-formed product 10 after the release, and to return to the state b portion of the press-molded product 10 is curved. Thus, the b portion of the press-molded product 10, (see arrow M2 in Fig. 8) a second moment toward the inside of the press-molded product 10 is produced.
[0080]
　Furthermore, the portion between the a portion and the b portion of the press-molded product 10, i.e. the ridge line portion 10B of the press-molded product 10 is bent in an arc shape that is convex to the outside of the press-molded product 10 by a shoulder portion 46D of the punches 46 ing. In the press-formed product 10 after the release, ridge portion 10B is, to try to return to the original state. Thus, the ridge portion 10B of the press-molded product 10, the third moment toward the outside of the press-molded product 10 (see arrow M3 in FIG. 8) occurs.
[0081]
　By the above, in the comparative example, the first and second moments occurring in a portion and the b portion of the press-molded product 10, and the third moment generated the ridge portion 10B of the press-molded product 10 is offset (balanced) it is to suppress the spring back of the press-molded product 10. However, in the manufacturing method of the comparative example, curved in accordance with the projecting amount H2 of the punch 46 of the inner pad 48 is increased, the amount of bending is increased relative to the slack portion 26, the convex slack portion 26 to the surface side of the intermediate molded article 22 the amount that is larger. Thus, according to the projecting amount H2 of the punch 46 of the inner pad 48 is large, a second moment generated in the b portion of the first moment and the press molded article 10 caused a portion of the press-molded product 10 is increased. Therefore, the amount of the vertical wall 10C is displaced to the inside of the press-molded product 10 is increased. In other words, that both the first and second moment is increased, with respect to the projecting amount H2 of the punch 46 of the inner pad 48, the dimensions of the vertical wall 10C is changed irritable in the width direction. As a result, for accommodating the vertical wall 10C of the molded within the tolerance set size, the range of the protrusion amount H2 of the punch 46 of the inner pad 48 (the difference between the upper and lower limits) becomes narrow.
[0082]
　In contrast, in the present embodiment, as described above, in the first step, the die pad 44 is held against the intermediate molded article 22 and the inner pad 48 to the position of the device the upper die pad 44 to the inner pad 48 point spaced a predetermined distance H1 against is different from the comparative example.
[0083]
　Furthermore, in the second step, maintaining between the die pad 44 and the inner pad 48 to a predetermined distance H1. Then, while the die 42 to maintain the relative positional relationship in the vertical direction of the apparatus between the die pad 44 and the inner pad 48 is moved to the device bottom. Therefore, as shown in FIG. 9, the first bending portion 24A of the flexible portion 24 of the intermediate molded article 22, deflection state that is convex to the device upper side, the upper end of the first bending portion 24A is underside 44A of the die pad 44 It comes into contact with.
[0084]
　However, the predetermined distance H1 is first bending portion 24A is configured to deflect the elastic region. Therefore, as in the above comparative example, it is possible to third flexure 24C is prevented from being deformed by plastic region.
[0085]
　Here, unlike the present embodiment, similarly to the comparative example, when the intermediate molded article 22 is pressurized 圧狭 equity in the die pad 44 and the inner pad 48, in a second step, deflection unit 24 first bending portion 24A bending of the device the upper is not allowed. Therefore, as with the comparative example, the third flexure 24C of the bending portion 24, plastically deformed slightly curved state so as to project to the surface side of the intermediate molded article 22. In contrast, in the present embodiment, that the die pad 44 is separated from the intermediate molded article 22 is different from the comparative example. Therefore, the deflection of the device the upper side of the first bending portion 24A is permitted, smaller deflection of the third bending portion 24C is, the intermediate product 22 as compared with the case of pressurized 圧狭 equity in the die pad 44 and the inner pad 48 . Moreover, the predetermined distance H1 is set to the maximum dimension of the first bending portion 24A can be bent by the elastic region. Therefore, deflection of the third bending portion 24C is further reduced, it can suppress plastic deformation of the third flexure 24C. Thus, the press-molded article 10 after the release, the b units described above, it is possible to suppress the generation of the second moment toward the inside of the press-molded product 10.
[0086]
　Accordingly, offset mainly the first moment towards the inside of the press-molded article 10 occurs in a portion, and a third moment towards the outside of the press-molded article 10 caused ridge 10B (balancing), the press springback of the molded product 10 can be suppressed. In other words, by suppressing the influence of the second moment relative displacement of the vertical wall 10C in the width direction, only predominantly first moment, it is possible to adjust the amount of displacement of the longitudinal wall 10C in the width direction.
[0087]
　Thus, with respect to the projection amount H2 change from the punch 46 of the inner pad 48, can suppress the size of the vertical wall 10C is changed irritable in the width direction, the vertical wall 10C of the molded within the tolerance set dimensions it can be expanded to for accommodating a range of projection amount H2 of the punch 46 of the inner pad 48 (the difference between the upper and lower limits).
[0088]
　Thus, it is possible to form the press molded article 10 to maintain the dimensional accuracy of the vertical wall 10C even expand the scope of the projecting amount H2 of the punch 46 of the inner pad 48 within the tolerance. That facilitates the management of the projecting amount H2.
[0089]
　This point will be described with reference to the graph shown in FIG. 10. This graph, a press-molded product 10 shown in FIG. 11 shows a simulation result when molded by the manufacturing method of the comparative example and this embodiment. This graph, projection amount and H2 from the punch 46 of the inner pad 48, the relationship between the position of the distal end portion of one of the vertical wall 10C in the width direction of the press-formed article 10 is shown.
[0090]
　First, a description will be given of each dimension of the press-molded product 10 shown in FIG. 11. In the press-molded product 10, the width dimension of the top plate 10A side of the press-molded product 10 is set to 90 mm. Further, vertical dimension of the press-molded product 10, i.e. the vertical distance from the outer surface of the top plate 10A to the surface of the flange 10E, which is set to 60 mm. Further, the angle formed between the top plate 10A and the longitudinal wall 10C in the press-molded article 10 is set to 100 °. Furthermore, the press-molded product 10, and the tensile strength plate thickness by 1.4mm is a high strength steel sheet of 1180MPa class.
[0091]
　Further, in the graph shown in FIG. 10, the horizontal axis represents the projection amount from the shoulder 46D of the punches 46 of the inner pad 48 H2 (mm), the vertical axis represents the tip portion on one of the vertical wall 10C of the press-molded product 10 It shows the position.
[0092]
　Incidentally, the vertical axis is shown the amount of deviation of the vertical wall 10C for setting the dimensions of the vertical wall 10C in the widthwise direction (amount of change) (mm) is. That is, the positive side of the vertical axis, show that vertical wall 10C after release after molding is located outside in the width direction with respect to the set dimension (position), the negative side of the vertical axis, sets the size (position ) vertical wall 10C after release after molding indicating that it is located inward in the width direction with respect.
[0093]
　Further, in this graph, the range indicated by dots indicates the region within tolerance for setting the size of one of the vertical wall 10C. That is, in the present embodiment, the tolerance for setting the size of one of the vertical wall 10C is set to ± 0.5 mm. Further, in this graph, white circles point of indicates the data of the comparative example, square marks the point of the black indicates the data of the present embodiment. Further, in the present embodiment shown in FIG. 10, a predetermined distance H1 is, is set to 2.4 mm. That is, vertical dimension of the gap between the intermediate molded article 22 and the die pad 44 in the first step is set to 1.0 mm.
[0094]
　As shown in this graph, the press-molded article 10 in the comparative example, as the projection amount H2 of the shoulder 46D of the punches 46 of the inner pad 48 is large, inner press-molded product 10 of the vertical wall 10C in the widthwise direction it can be seen that the amount of displacement of the increases. In other words, in the comparative example, it can be seen that the slope of the line connecting the data is negative. Range projection amount H2 to be within a tolerance of set dimensions of absolute the value is large vertical wall 10C of the slope of the line connecting the data becomes narrow. In Comparative Example, in order to form the vertical wall 10C within the tolerance of setting dimensions, the projection amount H2, should be set between about 1.9 mm ~ 2.5 mm, manufacture, tolerable amount of protrusion H2 the range of variation of is, is about 0.6mm. That is, in the press device 40, in the variation range of the protrusion amount H2, allowable (in the range of 0.6 mm), to adjust the position of the inner pad 48 against the punch 46, there is a need to produce press-formed product 10.
[0095]
　In contrast, according to this embodiment, as shown in the graph of FIG. 10, the absolute value of the slope of the line connecting the data is smaller as compared with the comparative example. In the present embodiment, the projecting amount H2 of for forming the vertical wall 10C within the tolerance set dimensions, is approximately 0.5 mm ~ 2.0 mm, manufacturing, the variation range of the protrusion amount H2, acceptable , it can be expanded to about 1.5mm. Therefore, according to the manufacturing method of a press molded product of the present embodiment, in order to keep the vertical wall 10C of the molded within the tolerance of the set dimension in the width direction, the range of projection amount H2 from the punch 46 of the inner pad 48 it can be expanded (the difference between the upper limit and the lower limit). Further, in the pressing device 40, it is possible to enlarge the adjustment range of the inner pad 48 can contribute to the improvement in productivity for the press-molded product 10.
[0096]
　Further, in this embodiment, the top 46C of the punch 46 in the press device 40, the inclined surface 46A that is recessed as it goes from the shoulder portion 46D of the punch 46 in the width direction center side of the punch 46 is formed. Further, on the lower surface of the die 42, the inclined surface 42C that is disposed opposite to the inclined surface 46A and forms a parallel to the inclined surface 46A is formed.
[0097]
　Therefore, in the third step described above, as the portion corresponding to the top plate 10A of the intermediate molded article 22 is warped in a convex back surface side of the intermediate molded article 22 (inner press-formed product 10), the intermediate molded article 22 the possible pressurized 圧狭 lifting the die 42 and the punch 46. This makes it possible to effectively flat the top plate 10A of the press-molded product 10.
[0098]
　This will be explained in detail. In the second step of the comparative example and this embodiment, the second deflection portion 24B of the bending portion 24 abuts against the shoulder portion 48C of the inner pad 48, so that the second bending portion 24B is curved convexly to the device upper side flex. Therefore, in the second step, there is a possibility that the habit bending is convex to the surface side of the intermediate molded article 22 is generated in the second bending portion 24B.
[0099]
　However, in this embodiment, the inclined surface 46A to the top 46C of the punch 46 is formed, the inclined surface 42C is formed on the lower surface of the die 42. Therefore, in the second bending portion 24B of the bending portion 24, even if the bending habit if can in the third step, bent back curl of the second flexures 24B. Therefore, it is possible to effectively flat the top plate 10A of the press-molded product 10.
[0100]
　Further, in this embodiment, the first step to the completion of the third step, to remain die pad 44 is separated a predetermined distance H1 with respect to the inner pad 48. That is, from the first step to the completion of the third step, maintaining the relative positional relationship between the die pad 44 and the inner pad 48, in a third step, disposing the lower surface 44A of the die pad 44 in the pad receiving portion 42B. Therefore, the dimensional variations or the like of the die 42 and the die pad 44, the lower surface 44A of the die pad 44 can be prevented from protruding from the pad receiving portion 42B to the device bottom. Thus, in the third step, the die 42 and the punch 46, it is possible to satisfactorily pressurized 圧狭 lifting the portion corresponding to the width direction both side portions of the top plate 10A in the intermediate molded article 22.
[0101]
(Second Embodiment)
　Next, referring to FIGS. 12 to 14, describes a method of press-molded product manufacturing the second embodiment. In the second embodiment, shaping the press-molded product 10 using a pressing device 60 which differs from the pressing device 40 of the first embodiment. The press machine 60 used in the second embodiment, except for the die pad 44 to be accommodated in the die 62 and the die 62 are configured similarly to the press apparatus 40 of the first embodiment. It will be specifically described below. In the press apparatus 60, in a portion that is configured similarly to the pressing device 40, it is denoted by the same reference numerals.
[0102]
　That is, in the die 62 and the die pad 44 of the pressing device 60, the width dimension DPH of the die pad 44, the width dimension of the smaller as compared with the first embodiment, the pad housing portion 42B of the die 62 to accommodate the die pad 44 DSH also, smaller that the compared to the first embodiment is different from the first embodiment.
[0103]
　Further, in the recess in the die 62 bottom of (die hole) 42A (surface facing the top 46C of the punch 46), between the inclined surface 42C and the pad housing portion 42B, a pair of the top plate forming surface 64 is formed It is. The top plate forming surface 64, extends from the widthwise inner end of the inclined surface 42C in the width direction center side of the die 62. Further, the top plate forming surface 64, while being disposed opposite to the inner pad 48 in the vertical direction of the apparatus, is parallel to the upper surface 48A of the inner pad 48.
[0104]
　Then, the first step in the second embodiment as in the first embodiment through the third step, forming a press-formed product 10. That is, as shown in FIG. 12, in a first step, in a state in which the inner pad 48 is projected from the pad receiving portion 46B to the device upper side, to set the back surface of the intermediate molded article 22 on the top surface 48A of the inner pad 48 . Then, a pad pressure device 52, to hold the die pad 44 from pad housing portion 42B is moved in the unit lower, the state of being spaced apart by a predetermined distance H1 the die pad 44 relative to the inner pad 48.
[0105]
　In the second step, from the state shown in FIG. 12, while maintaining the relative positional relationship between the die pad 44 and the inner pad 48 in the vertical direction of the apparatus, the die 62, relative to the die pad 44, inner pad 48, and the punch 46 , move relatively in the mobile device 50 to the device lower a punch 46 side. Thus, pushing the punch 46 into the recess (die hole) in 42A of the die 62, forming a portion corresponding to the vertical wall 10C of the intermediate product 22 (see FIG. 13A).
[0106]
　Next, the die 62, relative to the die pad 44, inner pad 48 and the punch 46, further relative movement of the apparatus under the mobile device 50, to integrate the die 62 and the die pad 44. That is, as shown in FIG. 13B, to accommodate the die pad 44 in the pad receiving portion 42B. Then, in the second embodiment, the end of the second step, care integrated die 62 and the die pad 44, the intermediate molded article 22 in the top plate forming surface 64 and the inner pad 48 of the die 62 pressure It is sandwiched.
[0107]
　In the third step, the die 62 and the die pad 44 are integrated, further pushing movement to the punch 46 side at the mobile device 50 to the device bottom. At this time, device and relative positional relationship between the die pad 44 and the inner pad 48 in the vertical direction, the pad pressure device the original pressure 圧狭 of the top plate 20A by the top plate forming surface 64 and the inner pad 48 of the die 62 52 in to maintain. While maintaining this state, the inner pad 48, moved to the device lower with the die 62 and the die pad 44, is housed in the pad receiving portion 46B (see FIG. 14A). That is, the portion corresponding to the top plate 10A of the press-molded product 10 in the intermediate molded article 22, so that the flat, to accommodate the inner pad 48 in the pad receiving portion 46B.
[0108]
　Further, the die 62 and the die pad 44 are integrated, further pushing movement to the punch 46 side to the device lower in the mobile device 50 from the state shown in FIG. 14A. Thus, as the portion corresponding to the top plate 10A of the intermediate molded article 22 is warped in a convex back surface side of the intermediate molded article 22 (inner press-formed product 10), the intermediate product 22 in the die 62 and the punch 46 pressurized 圧狭 to lifting (see FIG. 14B). As a result, the press-formed product 10 after the release, the top plate 10A is flat. Thus, also in the second embodiment, it is possible to suppress the second moment generated in the press-molded article 10, it is possible to obtain the same effects as the first embodiment.
[0109]
　Further, in the second embodiment, the end of the second step, when obtained by integrating the die 62 and the die pad 44, the intermediate molded article 22 in the top plate forming surface 64 and the inner pad 48 of the die 62 pressure it can be sandwiched. Thus, it is possible to contribute to the flattening of the top plate 10A of the press-formed product 10 after molding.
[0110]
　In the first embodiment and the second embodiment, the press-molded article 10 is formed in a sectional hat shape, a press-molded article 10, the open U-shaped cross section (groove shape to the lower side ) to may be formed. That is, it is possible to apply the press-molded product 10 even when the omitted form the pair of ridge portions 10D and the flange 10E, a manufacturing method of the first embodiment and the second embodiment of the press-molded product . Further, in this case, without performing pre-processing the material metal plate 20 is directly pressed material metal plate 20 by a press device 40, 60. Further, it is possible to apply one of the ridge portions 10D and even when the omitted form the flange 10E, the manufacturing method of the first embodiment and the second embodiment of the press-molded product in the press-molded product 10 .
[0111]
　Further, in the first embodiment and the second embodiment, the top plate 10A and the vertical wall 10C of the press-molded product 10 has been formed into a flat plate, the top plate 10A and the vertical wall 10C of the press-molded product 10 it may form a step shape. Furthermore, it may be slightly curved press molded article 10 so that the longitudinal direction intermediate portion of the press-molded product 10 in plan view is convex in the width direction of one side or the other widthwise side. It may also be slightly curved press molded article 10 so that the longitudinal direction intermediate portion of the press-molded product 10 as viewed from the side has a convex shape to the upper or lower side.
[0112]
　Further, the press-molded product 10, in view of suppressing the occurrence of second moments described above, the first bending portion 24A of the flexible portion 24 of the intermediate molded article 22 to deflect in an elastic region, the predetermined distance H1 setting it is desirable to. However, as described above, for example, within the range of the position error, etc. of the die pad 44 and the inner pad 48 in the vertical direction of the apparatus, the first bending portion 24A of the flexible portion 24 may be deflected by plastic region. In this case, in the third step described above, it can be bent back bending portion 24 to the inside of the press-molded product 10.
[0113]
　These also makes it possible to flatten the top plate 10A of the press-molded product 10 after release. Further, it is possible to effectively suppress the press flatness, etc. of the top plate 10A of the molded product 10 can be a fit within the tolerance, and the occurrence of the second moment after release. In this case, the lower surface 44A of the die pad 44 is provided a convex shape protruding toward the inner pad 48 side (apparatus bottom), the top surface 48A of the inner pad 48 to open to the die pad 44 side (device upper), corresponding to the convex it may be formed with a concave shape.
[0114]
　Further, in the first embodiment and the second embodiment, the die 42 (62) to form a pair of inclined surfaces 42C, it has formed the pair of inclined surfaces 46A on the top 46C of the punch 46, the inclined surface the 42C and the inclined surface 46A may be omitted. That is, the bottom surface of the recess 42A of the die 42 (62) as well as a flat shape, may be flat without recessed surface of the top end 46C of the punch 46.
[0115]
　Further, in the first embodiment and the second embodiment, when integrating the die pad 44 and the die 42 (62) (i.e., the end of the second step), the lower surface 44A of the die pad 44 is a pad housing part It housed within 42B. Alternatively, when integrating the die pad 44 and the die 42 (62) (i.e., the end of the second step), it may be the bottom surface 44A of the die pad 44 to the opening surface flush the pad housing portion 42B . That may be the vertical dimension of the die pad 44 below vertical dimension of the pad housing portion 42B.
[0116]
　If the vertical dimension of the die pad 44 and the pad receiving portion 42B are the same, the contact will be described with reference to the first embodiment, the end of the second step, the upper surface of the bottom and the die pad 44 of the pad receiving portion 42B of the die 42 ( bottoming) makes. If vertical dimension of the die pad 44 is smaller than the vertical dimension of the pad housing portion 42B controls the pad pressing apparatus 52 by the control unit 56, the lower surface 44A of the opening surface and the die pad 44 of the pad receiving portion 42B flush to.
[0117]
　Thereafter, in the third step, integrating move the die 42 and the die pad 44 was (with a fixed relative position) to the device under the mobile device 50, pressure to the intermediate molded article 22 in the inner pad 48 and the die pad 44 圧狭it may be lifting. Then, as shown in FIG. 15, the end of the third step, the intermediate molded article 22 with a pressurized 圧狭 lifting state with inner pad 48 and the die pad 44, the die 42 and the die pad 44 and the inner pad 48, the punch 46 move relative to the apparatus bottom against. That is, to move from the state shown in FIG. 15 the die 42 and the die pad 44 and the inner pad 48 to the device bottom. Thus, the entire part corresponding to the top plate 10A in the intermediate product 22, since it pressurized 圧狭 lifting by the die 42 and the die pad 44 and the punch 46 and the inner pad 48 to better planarized top plate 10A be able to.
[0118]
　Further, in the first embodiment and the second embodiment, the first step to the completion of the third step, by operating the pad pressing apparatus 52 by the control unit 56, the inner pad 48 to the die pad 44 maintaining a predetermined distance H1 separated state against. Alternatively, the end of the third step, by operating the pad pressing apparatus 52 by the control unit 56 moves the die pad 44 to the device bottom, the intermediate molded article 22 in the inner pad 48 and the die pad 44 pressurized 圧狭 may be lifting. In this case, the end of the third step, the entire part corresponding to the top plate 10A in the intermediate product 22, it is possible pressurized 圧狭 lifting by the die 42 and the die pad 44 and the punch 46 and the inner pad 48, the top plate 10A the can better flattened.
[0119]
　Further, in the first embodiment and the second embodiment, the first step to the completion of the third step, by operating the pad pressing apparatus 52 by the control section 56, inner pad 48 is die pad 44 maintaining a predetermined distance H1 separated state against. Alternatively, a stopper for maintaining the separated state with respect to the inner pad 48 of the die pad 44 may be provided on the die pad 44 or the inner pads 48.
[0120]
　For example, as shown in FIG. 16, provided with a stopper 49 which projects the pressing direction on the upper surface 48A of the inner pad 48. In this case, the intermediate molded article 22 or the material metal plate 20 to form a collar can be inserted 28 stopper 49. Then, setting the protrusion height of the stopper 49 from the upper surface 48A of the inner pad 48 to a predetermined distance H1. The predetermined distance H1 is, as shown in FIG. 3B for example, in a state where the die 42 is the relative position between the die 42 and the punch 46 reaches the molding bottom dead center becomes molded bottom dead center, the punch wall 46E and the die hole greater than the clearance of the wall 42F.
[0121]
　Thus, by the lower surface 44A of the die pad 44 abuts on the tip portion of the stopper 49 can be maintained die pad 44 at a predetermined distance H1 separated state with respect to the inner pad 48. Also, the first step to the completion of the third step, the predetermined distance H1 between the die pad 44 and the inner pad 48, can be mechanically maintained. Incidentally, the pad pressure device 52, a hydraulic device, in addition to the electric drive apparatus or the like, the spring may be a gas cushions.
[0122]
　Further, in the example shown in FIG. 16, although the stopper 49 is provided to be relatively immovable in one of the die pad 44 and the inner pad 48, provided one on the stopper 49 of the die pad 44 and the inner pad 48 movable relative it may be. Hereinafter, this point, using a pressing device 40 shown in FIG. 15 will be described as an example which is provided movable relative to the inner pad 48 to the stopper 49.
[0123]
　In this example, as shown in FIG. 17, forming the accommodation recess 48B for accommodating the stopper 49 on the upper surface 48A of the inner pad 48. Then, in the accommodating recess 48B, movably accommodate stopper 49 to the device vertically. Furthermore, between the bottom and the stopper 49 of the accommodation recess 48B, providing the urging mechanism 58 which is an example of a telescopic mechanism that expands and contracts the pressing direction. Biasing mechanism 58 may be, for example, a spring or a hydraulic cylinder or the like.
[0124]
　Biasing mechanism 58 imparts a biasing force directed to the device upper side to the stopper 49. Stopper 49 protrudes from the upper surface 48A of the inner pad 48 to the pressing direction by the biasing force of the biasing mechanism 58. As shown in FIG. 17, the position of the stopper 49 in a state where the stopper 49 is projected or upper surface 48A of the inner pad 48 to the initial position.
[0125]
　Although not shown, the inner pad 48, in the initial position, restricting portion for restricting the movement of the device the upper against the inner pad 48 of the stopper 49 is formed. Then, in the initial position, the biasing force of the device the upper by the biasing mechanism 58 is formed under the action of the stopper 49, the protrusion height of the stopper 49 from the upper surface 48A of the inner pad 48 is a predetermined distance H1.
[0126]
　Moreover, actuation force of the mobile device 50 (F1), an example in pressing direction biasing force of the biasing mechanism 58 is a telescopic mechanism (holding force: F2), pressure of the inner pad 48 by the pad pressure device 54 (holding force : F3), and pressure (holding force of the die pad 44 by the pad pressure device 52: F4) have a relationship of the following equation (1).
　F1> F2> F3> F4 ··· ( Equation 1)
　Moreover, the intermediate molded article 22 or the material metal plate 20, holes 28 for inserting the stopper 49 is formed.
[0127]
　Then, as shown in FIG. 17, in a first step, the stopper 49 is inserted into the hole 28 of the intermediate molded article 22, it sets the intermediate molded article 22 on the top surface 48A of the inner pad 48. Then, by operating the pad pressing apparatus 52 by the control unit 56 moves the die pad 44 from pad housing section 42B to the device bottom abuts the front end portion of the stopper 49. At this time, the relation of the equation (1), the pressure of the pad pressing device 54, can maintain a state where the inner pad 48 is protruded from the punch 46 to the device upper side. Then, by the biasing force of the biasing mechanism 58, the die pad 44 is spaced only device upper predetermined distance H1 with respect to the inner pad 48.
[0128]
　And, although not shown, in the second step, to move the die 42 to the device under the mobile device 50. In this case, to keep the stopper 49 to the initial position by the biasing force of the biasing mechanism 58. That is, while maintaining the separated state by a predetermined distance H1 with respect to the inner pad 48 to the die pad 44, to integrate the die 42 and the die pad 44. In the second step, when the mobile device 50 to move the die 42 to the device bottom, to form a vertical wall 10C by bending the intermediate product 22. In this case, operation force of the moving device 50 is greater than pressure of the inner pad 48 by the pad pressing device 54, can maintain the protruding state from the punch 46 of the inner pad 48.
[0129]
　Furthermore, in the third step, further moving to accommodate the inner pad 48 in the pad receiving portion 46B of the die 42 and the die pad 44 that is integrated into the device under the mobile device 50. In this case, the above equation (1), while maintaining stopper 49 in the initial position, the inner pad 48, moved to the device bottom with die 42 and the die pad 44. In other words, while the predetermined distance H1 between the die pad 44 and the inner pad 48 and maintained by the stopper 49, the inner pad 48, moved to the device bottom with die 42 and the die pad 44, the pad housing section across inner pad 48 accommodated in the 46B.
[0130]
　Then, the end of the third step, integral die 42 and further by moving the die pad 44 to the device under the mobile device 50 to reach the bottom dead center. In this case, the above equation (1), against the biasing force of the biasing mechanism 58, the stopper 49 is moved to the device lower with respect to the inner pad 48. That is, with the movement of the device the lower side with respect to the inner pad 48 of the stopper 49 to move the die 42 and the die pad 44 are integrated to the device lower with respect to the inner pad 48.
[0131]
　Then, as shown in FIG. 18, when the die 42 and the die pad 44 has reached the bottom dead center, most of the stopper 49 (portion except for the tip portion) is received in the receiving recess 48B. In this way, by the stopper 49 to the inner pad 48 is provided to be relatively movable, the entire part corresponding to the top plate 10A in the intermediate product 22, pressurized by the die 42 and the die pad 44 and the punch 46 and the inner pad 48 it is possible to 圧狭 equity. Therefore, as in the example shown in FIG. 15, it can be better planarized top plate 10A.
[0132]
　Instead of the above-described (Equation 1), the actuating force of the mobile device 50 (F11), pressure of the inner pad 48 by the pad pressure device 54 (holding power: F12), the biasing mechanism, which is an example of a telescopic mechanism 58 biasing force of (F13), and pressure (holding force: F14) of the die pad 44 by the pad pressure device 52 may be set to satisfy the relationship of the following equation (2).
　F11> F12> F13> F14 ··· ( Equation 2)

claims

A method of vertical wall from the pair of ridge portions positioned on both sides in the width direction of the top plate to produce the top plate of the extending out the press-molded article to the thickness direction on one side,
　inner provided in the top of the punch with the and material metal sheet is projected from the punch to the die side pad is placed on the inner pad, wherein the and the die pad are projected die pad provided in the die from the die to the punch side of said inner pad material a first step of placing at a position is spaced by a large predetermined distance than the thickness of the metal plate,
　the die pad of the die, the said inner pad, and moved relative to the punch side with respect to the punch die and and forming the vertical wall by the punch, and a second step of integrally the die pad and the die,
　and the die and the die pad are integrally Third step and, whose serial in the inner pad, the moved relative to the punch side with respect to the punch to form the top plate
　manufacturing method of the press-molded product having a.
[Requested item 2]
　Wherein during the period from the first step to the completion of the third step, the manufacturing method of a press molded article according to claim 1 in which the relative positional relationship between the inner pad and the die pad is maintained.
[Requested item 3]
　The inner pad and one of said die pad, the inner pad and the predetermined distance protruded process for the preparation of the press-molded product according to claim 2 in which the stopper is provided to the other side of the die pad.
[Requested item 4]
　And in the end in the second step, and holding the material metal plate by the inner pad and the die pad are moved relative to the punch side the die pad and the die is integrated with respect to the punch,
　the third in the step, the press according to claim 1 for relatively moving the said inner pad and the die and the die pad while holding the material metal plate by the inner pad and the die pad to the punch side with respect to the punch manufacturing method of a molded article.
[Requested item 5]
　The one on the inner pad and the die pad, the inner pad and the predetermined distance protruded stopper is provided to the other side of the die pad, the stopper is configured to be relatively movable to said one side,
　said that the stopper from the first step to the end of the third step is brought into contact with the other, the relative positional relationship between the inner pad and the die pad is maintained,
　at the end of the third step, the stopper by but is moved to the one side, to holding the material metal plate by the die pad and the inner pad is moved relative the die pad and the die is to integrally to the punch side with respect to the inner pad the method of press-molded product produced according to claim 1.
[Requested item 6]
　The top of the punch, the punch-side inclined surface that is recessed in accordance with the shoulder portion of the punch toward the widthwise center side of the punch is formed
　on the opposing surface of the die facing the top of the punch, the punch-side die-side inclined surface corresponding to the inclined surface is formed,
　at the end of the third step, claim 1, holding the material metal sheet by the punch-side inclined surface and the die-side inclined surface to the claim 5 method for manufacturing a press molded article according to any one of.
[Requested item 7]
　A press apparatus for manufacturing the top plate pair of press-moldings vertical wall from the edge line portion is extended to the thickness direction one side of the top plate positioned on both widthwise sides of the from the material metal sheet,
　inner to the top a punch having a pad,
　a die having a die pad disposed to face the inner pad,
　the connecting relatively movable said inner pad to the punch in the opposing direction of said die and said punch a first coupling device,
　and a second coupling device for relatively movably coupled to the die the die pad in the opposing direction of the die and the punch,
　said during forming the vertical wall by the die and the punch maintained at the first coupling device and said the die pad by actuating the second coupling device spaced plate larger predetermined distance than the thickness of the material metal plate from the inner pad position A control unit for,
　pressing device provided with a.
[Requested item 8]
　A press apparatus for manufacturing the top plate pair of press-moldings vertical wall from the edge line portion is extended to the thickness direction one side of the top plate positioned on both widthwise sides of the from the material metal sheet,
　inner to the top a punch having a pad,
　a die having a die pad disposed to face the inner pad,
　the connecting relatively movable said inner pad to the punch in the opposing direction of said die and said punch a first coupling device,
　and a second coupling device for relatively movably coupled to the die the die pad in the opposing direction of the die and the punch,
　provided on one of the inner pad and the die pad, the inner pad and a stopper that protrudes by a predetermined distance to the other side of the die pad
　pressing device provided with.
[Requested item 9]
　A press apparatus for manufacturing the top plate pair of press-moldings vertical wall from the edge line portion is extended to the thickness direction one side of the top plate positioned on both widthwise sides of the from the material metal sheet,
　inner to the top a punch having a pad,
　a die having a die pad disposed to face the inner pad,
　the connecting relatively movable said inner pad to the punch in the opposing direction of said die and said punch a first coupling device,
　and a second coupling device for connecting relatively movable said die pad in the opposing direction of the die and the punch relative to the die,
　by operating the movement to move the die to the punch side and device,
　wherein provided on one of the inner pad and the die pad, the to inner pad and the other side of the die pad while being protruded by a predetermined distance, relative to the one side A rotatably-configured stopper,
　in a state where the stopper is projected to the other side, and a biasing mechanism that applies a biasing force to said other side in said stopper
　comprises a
　hydraulic force of the mobile device, biasing force of the biasing mechanism, the holding force of the first connecting device, and the holding force of the second coupling device,
　the holding of the actuating force of the mobile device> biasing force> the first coupling device of the biasing mechanism retention force> the second coupling device
　or
　holding force of the actuating force of the mobile device> retention of the first coupling device> biasing force> the second connection device of the biasing mechanism
　Press apparatus is set in the relationship.
[Requested item 10]
　The top of the punch, the are from the shoulder portion of the punch is formed punch-side inclined surface that is recessed as it goes to the widthwise central side of the punch,
　on the opposing surface of the die facing the top of the punch, the Press device according to any one of claims 7 to claim 9, die-side inclined surface corresponding to the punch-side inclined surface is formed.
[Requested item 11]
　Top across the pressing direction, inner pad accommodating portion formed in said top, the punch shoulder portions provided on both sides of the top, and a punch having a punch walls extending from the punch shoulder,
　the pressing direction crossing has inner pad top surface, said inner pad movable accommodated in the inner pad accommodating portion to the pressing direction,
　the connecting the inner pad and the punch, the press direction of the inner pad and the punch a first coupling device for changing the distance,
　the die bottom facing the top, the die pad accommodating portion formed in the die bottom portion, said bottom corner portions provided on both sides of the die bottom corresponding to the punch shoulder part, and a die having a die hole wall corresponding to extend out the punch wall than the bottom corners,
　has a inner pad facing surface opposed to the inner pad top surface, the die pad Osamu And the die pad movable accommodated to the pressing direction into parts,
　and connecting the said die pad die, and a second coupling device for changing the press direction distance between the said die pad die,
　the said inner pad change by controlling the first coupling device a distance between the punch, the distance between the said die pad die, and a control unit for changing by controlling the second coupling device
　a press device provided with a.
[Requested item 12]
　Top across the pressing direction, inner pad accommodating portion formed in said top, the punch shoulder portions provided on both sides of the top, and a punch having a punch walls extending from the punch shoulder,
　the pressing direction crossing has inner pad top surface, said inner pad movable accommodated in the inner pad accommodating portion to the pressing direction,
　the connecting the inner pad and the punch, the press direction of the inner pad and the punch a first coupling device for changing the distance,
　the die bottom facing the top, the die pad accommodating portion formed in the die bottom portion, said bottom corner portions provided on both sides of the die bottom corresponding to the punch shoulder part, and a die having a die hole wall corresponding to extend out the punch wall than the bottom corners,
　has a inner pad facing surface opposed to the inner pad top surface, the die pad Osamu And the die pad movable accommodated to the pressing direction into parts,
　and connecting the said die pad die, the second coupling device for changing the distance between the pressing direction, between the said die pad die
　the inner pad top surface or wherein provided on one inner pad facing surface, and a stopper, which projects into the pressing direction
　pressing device provided with.
[Requested item 13]
　Top across the pressing direction, inner pad accommodating portion formed in said top, the punch shoulder portions provided on both sides of the top, and a punch having a punch walls extending from the punch shoulder,
　the pressing direction crossing has inner pad top surface, said inner pad movable accommodated in the inner pad accommodating portion to the pressing direction,
　the connecting the inner pad and the punch, the press direction of the inner pad and the punch a first coupling device for changing the distance,
　the die bottom facing the top, the die pad accommodating portion formed in the die bottom portion, said bottom corner portions provided on both sides of the die bottom corresponding to the punch shoulder part, and a die having a die hole wall corresponding to extend out the punch wall than the bottom corners,
　has a inner pad facing surface opposed to the inner pad top surface, the die pad Osamu And the die pad movable accommodated to the pressing direction into parts,
　and connecting the said die pad die, and a second coupling device for changing the press direction distance between the between the die pad die,
　said die said punch a moving device for relatively moving to the side,
　is provided through the expansion mechanism that expands and contracts to the pressing direction to one of the inner pad top surface or the inner pads facing surface, and a stopper projecting in the press direction
　with a ,
　the actuating force of the mobile device, the holding force of the pressing direction of the telescopic mechanism, the holding force of the first connecting device, the holding force of the second connecting device is a press device which is either the following relations.
　The actuating force of the mobile device> retention force of the pressing direction of the retaining force> holding force of the first connecting device> the second connection device of the telescopic mechanism
　or
　the actuating force of the mobile device> The first connection device the press direction of the holding force> holding force of the second connecting device of the holding force> the telescopic mechanism
[Requested item 14]
　Projection height of the pressing direction of said stopper, when said die and said punch has reached a molding bottom dead center, claim 12 or claim is greater than the clearance between the punch wall and the die bore wall press apparatus according to 13.
[Requested item 15]
　Press device according to any one of claims 11 to claim 14 comprising a punch-side inclined surface that is recessed according to the top of the punch extending from the punch shoulder to the inner pad accommodating portion.
[Requested item 16]
　Press device according to any one of claims 11 to claim 15 comprising a die-side inclined surface that protrudes toward the respective bottom corner to the die pad receiving portion to the die bottom of the die.
[Requested item 17]
　The base angle section, the press apparatus according to item 1 in any one of the punch shoulder part and claims 11 to 16 irregularities has a shape inverted.