[0001]
　The invention, of the press-molded product relates to a manufacturing method and a manufacturing apparatus.
BACKGROUND
[0002]
　Among automotive body components, for example, a front pillar reinforcements or the center pillar reinforcements, the front side member rear, the rear side member, a cross member, a strength member or reinforcing member having, for example, hat-shaped cross section, are known.
[0003]
　For example, Patent Document 1, a method for producing a press-molded article for an automobile body having excellent crashworthiness is disclosed. In this manufacturing method, by performing bending a metal plate, to produce a top plate, a pair of ridge lines continuous with the top plate, an intermediate molded article having a pair of vertical walls continuous to the pair of ridge lines.
[0004]
　Then, the intermediate product was placed in a state of being protruded top plate toward the punch side, then the top plate is pressed by the punch to insert the punch into the die, opposite the projecting direction before the punch inserting the top plate performing press molding to protrude in the direction. This production method, by performing the unbending process bend the bending portion of the intermediate molded article in the reverse direction, thereby work-hardening the vertical wall of the press-molded product.
[0005]
　Above the strength member and the reinforcing member, securing the necessary strength, avoiding interference with other components, further it is designed under constraints such as securing the desired space. Therefore, these members are to secure the freedom of the cross-sectional shape, it is often changed variously shaped such as the height of the vertical walls constituting the cross-sectional shape.
[0006]
　However, the formability of the steel sheet as the intensity of the steel sheet is increased is reduced. Therefore, the ordinary aperture diaphragm method (punching, using a die and a blank holder) and a normal pad bending method by performing the press forming high strength steel plate by (punching, using a die and pad), the vertical wall heights but if the production of press-formed product having a shape that varies in the longitudinal direction, cracks and wrinkles occur in the press molded product.
[0007]
　The invention disclosed in Patent Document 1, as shown in paragraph 0031 and FIGS. 1 to 3 of Patent Document 1, the longitudinal direction has a hat cross-section having a shape vertical wall is linear direction is not curved in the longitudinal direction press a molded article of interest. Therefore, in the invention disclosed in Patent Document 1, the vertical wall is not possible to produce press-formed product which is curved in the longitudinal direction.
[0008]
　Strength Therefore, (a) be assembled by joining a plurality of divided parts which are press-formed, (b) a plurality of times of press forming (e.g., deep drawing after shallow-drawn molding) be performed, (c) steel increasing the thickness as well as decrease, further, it measures is necessary, such as changing the design in (d) of the press-formed product shape press formable shape. However, by any of the measures, the cost of manufacturing the press-molded product is increased.
[0009]
　Patent Document 2, by performing press molding twice, vertical wall of the flange in the center pillar reinforcements to curved longitudinal wrinkles, when viewed by the width of the top plate is varied in the longitudinal direction L invention to prevent wrinkling of the top plate is disclosed in the press molded article exhibiting shape or T-shape.
[0010]
　In the invention disclosed in Patent Document 2, the first press-forming, molding the flange wrinkle-free intermediate product by draw forming shallow curved portion. Then, the second press molding, pad bending mold while pressing the top plate of the intermediate product in the pad. Thus, forming the center pillar reinforcements while preventing the occurrence of the top plate wrinkles.
[0011]
　Patent Document 3, a press-molded article which is curved in the longitudinal direction and wrinkles flange generated in the center pillar reinforcements, the width of the top plate of the L-shaped or T-shaped in top view, which varies in the longitudinal direction wrinkles of the top plate in the press molded articles without increasing the number of press-molding, the invention is disclosed to prevent.
[0012]
　Invention disclosed in Patent Document 3 performs pressing by the blank holder in the first stage. Starts draw forming in a second stage. In the course of molding the diaphragm in a third step (forming height 0-50%) starts pad pressing of the top plate. By a single press-molding consisting of first to third stages, preventing the wrinkling of the parts of the flange to be bent in the longitudinal direction, the wrinkles of the top plate of the part width of the top plate in the longitudinal direction changes.
[0013]
　The disclosed by Patent Document 3 invention, reversal of the arrangement of the mold does not occur. That is, the blank holder is arranged above the punch, and by placing the upper mold pad above the blank holder starts pressing. Then, in the course of performing holding by drawing by the upper die and the blank holder blanks are held by the upper die pad and the punch blanks. Thus, is the one in the press molding can be prevented wrinkles flange wrinkles and the top plate.
CITATION
Patent Document
[0014]
Patent Document 1: Patent No. 5728334 Patent specification
Patent Document 2: WO 2014/050973 pamphlet
Patent Document 3: JP 2014-240078 JP
Summary of the Invention
Problems that the Invention is to Solve
[0015]
　Invention disclosed in Patent Document 2 is to increase the number of press molding, the manufacturing cost of the press-molded product is increased.
　When carrying out the invention disclosed in Patent Document 3, a molding failure envisioned by the studies by the present inventors, 22, will be described with reference to FIGS. 23 (a) and FIG. 23 (b).
[0016]
　Figure 22 is contemplated invention disclosed in Patent Document 3 is an explanatory view showing the generation part of the wrinkles of the top plate. As shown in A-A cross-sectional view of FIG. 22, the invention disclosed by Patent Document 3 performs pad retainer by the pad 3 and the punch 4 after the blank hold by blank holder 1 and the upper die 2. Therefore, the vertical wall height in the production of press-formed product which varies in the longitudinal direction, is assumed to occur by the material more than that generated at the time the top plate wrinkles drawing the top plate 5a of the molded article 5 .
[0017]
　Figure 23 (a) and FIG. 23 (b) is assumed in the invention disclosed in Patent Document 3 is an explanatory diagram showing the occurrence of the vertical wall of the wrinkles. As shown in FIG. 23 (a), when the height of the vertical wall of the press-molded product to be molded is greatly changed in the longitudinal direction (for example, when the angle θ in FIG. 23 (a) of 80 ° greater), pad 3 and a height position YA to hold the metal plate 6 by a punch 4, sectional portions of the upper and lower relationship between the height position YB for holding the metal plate 6 by the upper die 2 and the blank holder 1 is reversed (hereinafter, " upside down that the cross-section point ") is inevitably generated.
[0018]
　When subsequently performing draw forming, too excess material comprises a horizontal position XA for holding the metal plate 6 by the vertical direction of the pad 3 and the punch 4 in FIG. 23 (a), the metal by the upper die 2 and the blank holder 1 between the horizontal position XB holding plate 6, it occurs. Therefore, the relationship between the force tensile strength and the upper die 2 and the blank holder 1 of the metal plate 6 to hold the metal plate 6 is buckled metal plate 6, a vertical wall as shown in FIG. 23 (b) it is envisioned that the wrinkles.
[0019]
　An object of the present invention is to provide a tensile strength of more than 400 MPa, mainly press molded article for automobile body strength members or for the reinforcing member, generates wrinkles wrinkles and the vertical wall of the top plate, a single press-forming can be prepared by, it is to provide a method and apparatus for manufacturing a press molded article.
[0020]
　Press-molded product is manufactured object of the present invention, there extends in the first direction. The press molded product is, cross-section having a flange shape in the pressing direction section crossing along and in the first direction to the press direction, the top plate, ridge leading to the top plate, leading to the vertical wall and the vertical wall leading to the ridge a shape.
[0021]
　The press molded product is at least one have the curved portion that curves in a first direction in one or both of the side view as viewed in the direction intersecting the top plane or the pressing direction as seen from the press direction. The press-molded product has a first portion including a curved portion and a second portion consecutive to the first portion. Furthermore, the minimum height of the vertical wall of the second portion is greater than or equal to the maximum height of the vertical wall of the first portion.
Means for Solving the Problems
[0022]
　The present inventors have made intensive studies in order to solve the above problems, obtained listed findings A, B below, and we have completed the present invention.
[0023]
　(A) forming divided stages during a single press-forming. Specifically, when the height of the vertical wall of the press-molded product is changed in a first direction, and when to hold the metal plate through a pad and a punch, attention is focused on the timing for holding the metal plate by the die and the blank holder. Then, the height position to hold the metal plate through a pad and a punch, vertically reversed at least one pressing direction cross section of the first direction the relationship between the height position to hold the metal plate by the die and the blank holder. Accordingly, without causing wrinkles in the respective flanges and the top plate can be produced above the press-molded product.
[0024]
　(B) i.e., the first phase of a single press-forming, partially in at least one of the shaped cross section of the longitudinal direction to be molded on the top plate in the metal plate to prevent wrinkles occur on the top plate and flange of the press-molded product It was retained by the pad and the punch, and a portion to be molded to the flange of the metal plate is held by the die and the blank holder completes the pads hold.
[0025]
　In the subsequent second step, the portion to be formed on the top plate in the metal plate holds the pad and a punch in at least one of the cross-section of the first direction, the portion of the die and the blank holder is molded into the flange of the metal plate while retaining, pad drawing.
[0026]
　Thus, unlike the invention disclosed in Patent Document 3, be reversed arrangement of the mold in the upper and lower in the first direction in the middle of one of press molding, the above-mentioned press-wrinkling of the top plate without causing or vertical wall of wrinkles, it can be produced.
[0027]
　The present invention is as listed below.
　(1) and the punch and blank holder, the use of a punch and the pad and the die are disposed to face the blank holder, are disposed between the punch and the blank holder and the pad and the die, the tensile strength there above steel sheet 400 MPa, the metal plate is an aluminum plate or aluminum alloy plate to a method for producing the press molded product by performing a press working,
　the press molded article, there extends in the first direction, the press shape in the pressing direction cross-section intersecting the along and first direction in direction, the top plate, ridge leading to the top plate, a cross-sectional shape having a flange connected to vertical wall and said vertical wall connected to said ridge, said pressing direction one or both smell side view seen from the top view or a direction intersecting the pressing direction as seen from Having at least one curved section that curves in the first direction, a first portion including the curved portion, and having a second portion consecutive to the first portion, the longitudinal in the second portion minimum height of the wall, the is at the vertical wall up above the height of the first portion,
　the first step of the pad hold state, after completion of the first stage, and the punch and the blank holder, wherein and a second step of performing a pad draw forming by using the pad and the die,
　in the pad hold state,
　the portion is formed in the top plate in the metal plate is held by said pad and said punch, and, portion to be molded to the flange in the metal plate is held by the die and the blank holder,
　In certain pressing cross section that exists in the portion to be molded to the first portion in the metal plate of the press cross section, is located in the pressing direction of the contact surface between the metal plate in the blank holder, wherein than the position in the pressing direction of the contact surface between the metal plate in the pad, located on the side where there is the pad arrangement direction of the pad and the punch,
　the corner of the abutment surface of the pad R center of the end portion, and the and the straight line connecting the centers of the corner R edge in the abutment surface of the blank holder, turned upside down section is an acute angle formed between the extension line of the abutment surface of the metal plate in the pad with angle is less 0 ° ultra 80 °,
　in the press cross section different from the specific pressing direction section of the press cross section, it said in the pad metal Position in the pressing direction of the contact surface of the plate is, to the position at the said pressing direction of the contact surface between the metal plate in the blank holder, located on the side where there is the pad in the arrangement direction the method of the press-molded product.
[0028]
　(2) In the first step, in the specific pressing cross section, the blank holder are available at a minimum height above the height position of the vertical wall, forming then the die is for the first to the metal plate the initiating method of the press-molded product produced according to (1).
[0029]
　(3) In the above first direction of the pressing direction cross section of the at least one position, the pad begins forming for the first to the metal plate, (1) or method of the press-molded product produced according to (2).
[0030]
　(4) said metal plate, a material metal sheet is pre-processed intermediate workpiece (1) to a method of press-molded product produced according to any one of (3).
[0031]
　(5) (1) to (4) performing a post-molding the press-molded article produced by the production method according to any one of method for producing a press-molded product.
[0032]
　(6) and the punch and blank holder, the opposite to the punch and the blank holder comprising a pad and die are arranged, are disposed between the punch and the blank holder and the pad and the die, the tensile strength there above steel sheet 400 MPa, the metal plate is an aluminum plate or aluminum alloy plate to a device for producing a press-molded product by performing a press working,
　the press molded article, there extends in the first direction, the press shape in the pressing direction cross-section intersecting the along and first direction in direction, the top plate, ridge leading to the top plate, a cross-sectional shape having a flange connected to vertical wall and said vertical wall connected to said ridge, said pressing direction one or both smell side view seen from the top view or a direction intersecting the pressing direction as seen from Having at least one curved section that curves in the first direction, a first portion including the curved portion, and having a second portion consecutive to the first portion, the longitudinal in the second portion minimum height of the wall, the is at the vertical wall up above the height of the first portion,
　the first step of the pad hold state, after completion of the first stage, and the punch and the blank holder, wherein to produce the press-molded product through a second step of the pad and the die carry out the pad drawing,
　in the pad hold state,
　the portion in which the pad and the punch is formed into the top plate of the metal plate holding and retaining the portion in which the die and the blank holder is molded to the flange in the metal plate
　In certain pressing cross section that exists in the portion to be molded to the first portion in the metal plate of the press cross section, is located in the pressing direction of the contact surface between the metal plate in the blank holder, wherein than the position in the pressing direction of the contact surface between the metal plate in the pad, located on the side where there is the pad arrangement direction of the pad and the punch,
　the corner of the abutment surface of the pad R center of the end portion, and the and the straight line connecting the centers of the corner R edge in the abutment surface of the blank holder, turned upside down section is an acute angle formed between the extension line of the abutment surface of the metal plate in the pad with angle is less 0 ° ultra 80 °,
　in the press cross section different from the specific pressing direction section of the press cross section, it said in the pad metal Position in the pressing direction of the contact surface of the plate is, to the position at the said pressing direction of the contact surface between the metal plate in the blank holder, located on the side where there is the pad in the arrangement direction , the press-molded product of the manufacturing equipment.
Effect of the invention
[0033]
　According to the present invention, there extends in the first direction (longitudinal direction), at least the cross-sectional shape, has at least one said curved portion, and having said first portion and said second portion the tensile strength is not less than 400MPa press-without generating wrinkles wrinkles and the vertical wall of the top plate can be produced by a single press forming.
BRIEF DESCRIPTION OF THE DRAWINGS
[0034]
[Figure 1A] Figure 1A is a perspective view showing a configuration example of a manufacturing apparatus according to the embodiment.
FIG 1B] Figure 1B is an explanatory diagram showing an upside-down sectional die structure comprising a paying attention points of the present invention.
[Figure 1C] Figure 1C is a perspective view showing an example of the press-molded product manufactured by the manufacturing apparatus of the embodiment.
[Figure 2A] Figure 2A, the corner R edge at the contact surface of the pad center, and a straight line connecting the centers of the corner R edges in abutment surface of the blank holder, the contact surface of the blank in the pad it is an explanatory view showing the upside down cross angle θ is an acute angle formed between the extension line.
[Figure 2B] Figure 2B is an explanatory view schematically showing a molding process according to the embodiment, and a side view illustrating a forming process according to the embodiment, secA in this side view, SECB, SECC, is a cross-sectional view of secD .
[Figure 2C] FIG 2C is an explanatory view schematically showing a molding process according to the embodiment, and a side view illustrating a forming process according to the embodiment, secA in this side view, SECB, SECC, is a cross-sectional view of secD .
FIG 2D] FIG 2D is an explanatory view schematically showing a molding process according to the embodiment, and a side view illustrating a forming process according to the embodiment, secA in this side view, SECB, SECC, is a cross-sectional view of secD .
FIG 2E] FIG 2E is an explanatory view schematically showing a molding process according to the embodiment, and a side view illustrating a forming process according to the embodiment, secA in this side view, SECB, SECC, is a cross-sectional view of secD .
[3] FIG. 3 (a) is an explanatory view showing a manufacturing apparatus having a reverse molding die upside down cross angle θ is less than 80 °, FIG. 3 (b), a manufacturing apparatus partially is an explanatory view showing an enlarged withdrawn.
[4] FIG. 4 (a) is an explanatory view showing a manufacturing apparatus having a reverse molding die upside down cross angle θ is less than 80 °, FIG. 4 (b), a manufacturing apparatus partially is an explanatory view showing an enlarged withdrawn.
[5] FIG. 5 (a) is an explanatory view showing a manufacturing apparatus having a reverse molding die upside down cross angle θ is less than 80 °, FIG. 5 (b), a manufacturing apparatus partially is an explanatory view showing an enlarged withdrawn.
[6] FIG. 6 (a) is an explanatory view showing a manufacturing apparatus having a reverse molding die upside down cross angle θ is less than 80 °, FIG. 6 (b), a manufacturing apparatus partially is an explanatory view showing an enlarged withdrawn.
[7] FIG. 7 (a) is an explanatory view showing a manufacturing apparatus having a reverse molding die upside down cross angle θ is less than 80 °, FIG. 7 (b), a manufacturing apparatus partially is an explanatory view showing an enlarged withdrawn.
[8] FIG. 8 (a) is an explanatory view showing a manufacturing apparatus having a reverse molding die upside down cross angle θ is less than 80 °, FIG. 8 (b), a manufacturing apparatus partially is an explanatory view showing an enlarged withdrawn.
[9] FIG. 9 (a) is a perspective view showing the shape of a press-molded article 20A prepared in Example, FIG. 9 (b), two views of the press-molded product 20A (top view and a side view ) it is.
[10] FIG. 10 (a) is a perspective view showing the shape of the press-molded product 20B produced in Example, Fig. 10 (b), two views of the press-molded product 20B (top view and a side view ) it is.
[11] FIG. 11 (a) is a perspective view showing the shape of a press-molded article 20C prepared in Example 11 (b) is, two views of the press-molded product 20C (top and side views ) it is.
[12] 12 (a) is a perspective view showing the shape of a press-molded article 20D prepared in Example, FIG. 12 (b), two views of the press-molded product 20D (top and side views ) it is.
[13] 13 (a) is a perspective view showing the shape of a press-molded article 20E prepared in Example 13 (b) shows, two views of the press-molded product 20E (top and side views ) it is.
[14] FIG. 14 (a) is a perspective view showing the shape of a press-molded article 20F prepared in Example, FIG. 14 (b), two views of the press-molded product 20F (top and side views ) it is.
[15] FIG. 15 (a) is a perspective view showing a press-molded article 20G shape prepared in Example, FIG. 15 (b), two views of the press-molded product 20G (top and side views ) it is.
[16] 16 (a) is a perspective view showing the shape of a press-molded article 20H which was produced in Example, Fig. 16 (b), two views of the press-molded product 20H (top and side views ) it is.
[17] 17 (a) is a perspective view showing the shape of a press-molded article 20I produced in Example, Fig. 17 (b), two views of the press-molded product 20I (top and side views ) it is.
[18] FIG. 18 (a) is a perspective view showing the shape of the press-molded product 20J prepared in Example, FIG. 18 (b), two views of the press-molded product 20J (top and side views ) it is.
[19] FIG. 19 (a) is a perspective view showing the shape of the press-molded product 20K produced in Examples, FIG. 19 (b), two views of the press-molded product 20K (top and side views ) it is.
[20] FIG. 20 (a) is a perspective view showing the shape of the press-molded product 20L produced in Example, Fig. 20 (b), two views of the press-molded product 20L (top and side views ) it is.
[21] FIG. 21 (a) is a perspective view showing the shape of the press-molded product 20M produced in Example, Fig. 21 (b), two views of the press-molded product 20M (top and side views ) it is.
[22] FIG. 22 is assumed invention disclosed in Patent Document 3 is an explanatory view showing the generation part of the wrinkles of the top plate.
[23] FIG. 23 (a) and FIG. 23 (b) is assumed in the invention disclosed in Patent Document 3 is an explanatory diagram showing the occurrence of the vertical wall of the wrinkles.
DESCRIPTION OF THE INVENTION
[0035]
　With reference to the accompanying drawings illustrating an embodiment of the present invention.
1. Configuration of a manufacturing apparatus 10 according to the embodiment of the present invention
　Figure 1A is a perspective view showing a configuration example of a manufacturing apparatus 10. Figure 1B is an explanatory view showing the structure of the upper and lower reversing section mold in the production apparatus 10 as a point of the present invention, cross-section and mold structure in the pad hold state in the present embodiment, as well as blank 15. Further, FIG. 1C is a perspective view showing an example of the press-molded product 20 manufactured by the manufacturing apparatus 10.
[0036]
　Figure 1A, 1B, the manufacturing apparatus 10 includes a punch 11 and the blank holder 12, the pad 13 and the die 14. Pad 13 and the die 14 are arranged opposite the punch 11 and the blank holder 12.
[0037]
　Punch 11, blank holder 12, the pad 13, any or all of the die 14, may be divided into a plurality in a first direction to be described later. In this case, it divided punch 11, blank holder 12, the pad 13, the die 14 to each of the components may be integrally operated in synchronization, be operated accompanied by relative movement without synchronization good.
[0038]
　Manufacturing apparatus 10 includes a metal plate disposed between the punch 11 and the blank holder 12 and the pad 13 and the die 14 (hereinafter, "blank" hereinafter) by performing press working to 15, for producing a press-molded product 20 .
[0039]
　Blank 15 is, for example, stamping, drawing processing, bending processing, blanking, trimming, further, the seat surface by stamping, beads, ridge, holes, have been made to pre-processing such as notches it may be. Moreover, the press molded article 20, restrike and trim, may be performed post-processing, such as piercing. Incidentally, pre-processing, the type of post-processing is, of course, not limited thereto.
[0040]
　Blank 15 is particularly desirably but not limited high strength material, steel sheet having a tensile strength of 400 ~ 2000 MPa, an aluminum plate or aluminum alloy plate. Tensile strength of the steel blank 15 is preferably not less than 440 MPa, more preferably not less than 590 MPa, more preferably not less than 780 MPa, even more preferably not less than 980 MPa, most preferably at least 1180 MPa.
[0041]
2. Press molded product 20 produced according to the present embodiment
　the press molded article 20 has a first direction (a double-headed arrow direction in FIG. 1C longitudinal press-formed product 20) present extends. Press-molded product 20, in the longitudinal direction of the entire region, the top plate 21, and two ridge lines 22, and two longitudinal walls 23, two flanges 25 and having at least cross-sectional shape (of the press-molded product 20 in a hat-shaped cross-section having a shape). Two ridges 22 leads to the top plate 21. Two vertical walls 23 leads to two ridge 22. Furthermore, the two flanges 25 leads to two vertical walls 23. Press-molded article 20 includes a top plate 21, and one ridge line 22, and one vertical wall 23, may have at least a cross-sectional shape and one of the flanges 25.
[0042]
　The height h of the vertical wall 23 of the press-molded product 20 (the pressing direction length) is changed in a first direction. If the maximum value of the difference of the height h of the vertical wall 23 is less than 5 mm, it can be formed without carrying out the present invention. On the other hand, when the maximum value of the difference of the height h of the vertical wall 23 is a 150mm greater, even by implementing the present invention is a wrinkle or cracking is likely top plate 21 and vertical wall 23, which further occurs in the flange 25 . Therefore, the maximum value of the difference of the height h of vertical wall 23 is desirably 5 ~ 150 mm.
[0043]
　With respect to the longitudinal direction of the entire length of the press-molded product 20 (the projection length from the press direction) {(maximum value of the difference in height h) / (total length)} ratio of the maximum value of the difference of the height h of the vertical wall 23 of the If the value is less than 0.005, it can be molded without implementing the present invention. On the other hand, if the value of this ratio is 0.200, greater than the present invention also wrinkles and cracks to implement the top plate 21 and the vertical wall 23, there is a possibility that further generates in the flange 25. Therefore, the value of this ratio is desirably from 0.005 to 0.200.
[0044]
　Press-molded article 20 has at least one curved section 24. Curved portion 24, as viewed from a side of a direction intersecting the vertical wall 23 (B arrow), curved in the first direction. When the minimum value of the radius of curvature R of the curved portion 24 is less than 30 mm, the present invention also wrinkles and cracks to implement the top plate 21 and the vertical wall 23, there is a possibility that further generates in the flange 25. On the other hand, the minimum value of the curvature radius R when is 5000mm, more than can be molded without implementing the present invention. Therefore, the minimum value of the radius of curvature R of the curved portion 24 is desirably 30 ~ 5000 mm.
[0045]
　The press molded product 20, together with the curved portion 24, or in place of the curved portion 24, at least one curved portion that is curved in the longitudinal direction when viewed from a direction intersecting the top plate 21 (A arrow) it may have.
[0046]
　Press-molded article 20 has a first portion 26 and second portion 27. The first portion 26 and second portion 27, with the first portion 26 is located between the two second portions 27, there alongside the first direction. The first portion 26 includes a curved portion 24. Minimum both height of the two vertical walls 23 of the second portion 27 is greater than or equal to the maximum height of the vertical wall 23 of the first portion 26.
　Curved portion 24, spaced apart in the first direction may be present two or more may be present two or more adjacent to the first direction.
[0047]
　Press-molded article 20 desirably has a size of listed below.
　Thickness: 0.4 ~ 6.0 mm
　the top plate 21 of the Width: 30 ~ 2000 mm
　height of the vertical wall 23: 20 ~ 500 mm
　flange 25 Width: 10 ~ 100 mm
　difference in height between the vertical wall 23 in the first direction the maximum value of: 5 ~ 150 mm
　radius of curvature minimum value of R of the curved portion 24: 30 ~ 5000mm
[0048]
　Press-molded article 20, as described above, despite having high tensile strength of at least 400 MPa, complexity of the height of the vertical wall 23 has at least one curved section 24 with changes in a first direction It has a shape. Therefore, flexibility of the cross-sectional shape of the press-molded product 20 is sufficiently ensured.
[0049]
　Therefore, press-molded product 20, the strength member and reinforcing member having, for example, hat-shaped cross section of the automotive body components (e.g., front pillar reinforcements or the center pillar reinforcements, the front side member rear, rear side member as cross member), it is very suitable.
[0050]
3. Detailed configuration of the manufacturing apparatus 10
　pad 13 and the punch 11 has a function of holding a portion of the blank 15 is formed into the top plate 21 of the press-molded product 20. Die 14 and the blank holder 12 has a function of holding a portion of the blank 15 is molded to the flange 25 of the press-molded product 20. Further, the punch 11 and the blank holder 12, the pad 13 and the die 14 has a function of performing the pad draw forming the blank 15 after completion pad hold.
[0051]
　Figure 2A, the center 13b of the corner R edges in abutment surface 13a of the blank 15 of the pad 13, and a straight line connecting the centers 12b of the corner R edges in abutment surface 12a of the blank 15 of the blank holder 12 and m, is an explanatory diagram showing an upside-down cross-sectional angle θ is an acute angle formed between the extension line n of the contact surface 13a of the blank 15 in the pad 13.
[0052]
　The pad 13 and the punch 11, die 14 and the blank holder 12, as shown in FIG. 2A, in particular the press cross section that exists in the portion to be molded to the first portion 26 of the blank 15 out of the press cross section, the blank holder position in the pressing direction of the abutment surface of the blank 15 in 12, to the position at the pressing direction of the abutment surface of the blank 15 in the pad 13, the pad 13 is present in the arrangement direction of the pad 13 and the punch 11 located on the side.
[0053]
　Further, the pad 13 and the punch 11, die 14 and the blank holder 12, as shown in FIG. 2A, completing the pads hold the upside-down cross-sectional angle theta as 0 ° <θ ≦ 80 °.
　Then, the pad 13 and the punch 11, die 14 and the blank holder 12, after completing the pad hold, has a function of performing the pad draw forming.
[0054]
　The upside down cross angle θ is below 0 ° Ultra 80 °. When the upper and lower reversing section angle θ is in 80 ° greater than the pad 13, the punch 11 and the die 14, the blank 15 may interfere succumbed blank 15 seat when the blank holder 12 is reversed by molding the movement, of the press-molded product 20 for wrinkles in the vertical wall 23, it can not be molded. On the other hand, when the upper and lower reversing section angle θ is at 0 ° or less, a normal drawing. Therefore, in the present invention, it is turned upside down cross angle θ is below 0 ° Ultra 80 °.
[0055]
　Limit upside down cross angle θ is, the tensile strength of the blank 15 is raised with the increase. The value of the upper and lower reversing section angle θ has a tensile strength of the blank 15, preferably set to 70 ° or less in the case of more than 980MPa, in the case of the tensile strength of less than 980MPa, it is desirable that the 60 ° or less.
[0056]
　As shown in FIG. 2A, and holding the blank 15 by the pad 13 and the punch 11, the steps to complete to retain the blank 15 by the die 14 and the blank holder 12, it referred to as "pad Hold Complete step".
[0057]
　In the manufacturing apparatus 10 and the manufacturing method, the pad hold completed step in forming the cross section of the longitudinal direction of the at least one location, to the extent that the upper and lower reversing section angle θ is below 0 ° Ultra 80 °, changing the mold cross section . Accordingly, wrinkling of the top plate 21, wrinkles of the vertical wall 22, and without generating wrinkles flange 24 can be shaped to press molded product 20.
[0058]
　Figure 2B ~-2E are both a diagram showing an outline of a forming process according to the present embodiment, and a side view illustrating a forming process according to the present embodiment, in the side view secA, B, C, the D it is a cross-sectional view. Note that FIG. 2B ~ Figure 2E shows the molding surface of each mold, the hatched portion indicates the vertical wall of the die 14, the punch 11. Pad 13 in FIG. 2B ~ Figure 2E, why the blank holder 12 is depicted as a line (lines), the pad 13 at each cross-section in this example, the blank holder 12 is because it is flat.
[0059]
　As shown in Figure 2D of SECD, in particular the press cross section that exists in the portion to be molded to the first portion 26 of the blank 15 out of the press cross section, in the press direction of the abutment surface of the blank 15 in the blank holder 12 position of, than the position in the pressing direction of the abutment surface of the blank 15 in the pad 13, is located on the side pad 13 is present in the arrangement direction of the pad 13 and the punch 12.
[0060]
　Hereinafter, over time an outline of the molding process of the press-molded product 20 of the present embodiment.
　Figure 2B ~ FIG 2D shows the first step of the manufacturing method according to this embodiment, FIG. 2E shows the second step of the manufacturing method according to the present embodiment.
[0061]
　Figure 2B is an initial stage (punches 11 of the molding top dead center position, the blank holder 12, the pad 13, the arrangement of the die 14) before the start shaping indicates, 2C is held by the pad 13 and the punch 11 has been completed step (punch 11 in the pad completion state position, the blank holder 12, the pad 13, the arrangement of the die 14) indicates, Figure 2D, the step of pads hold is complete (punches 11 of a pad hold position, the blank holder 12, the pad 13 shows the arrangement of the die 14), further, FIG. 2E, reach molding bottom dead center, the end stage after completion of molding (punch 11 at a molding bottom dead center position, the blank holder 12, the pad 13, the die 14 It shows the placement).
[0062]
　In the initial stage before starting the molding shown in FIG. 2B (molded top dead center position), the pad 13 in secC is brought into contact with the upper surface of the blank 15. secA, SECB and secD the punch 11, blank holder 12, the pad 13, none of the die 14 is not in contact with the blank 15.
[0063]
　In step holding by the pad 13 and the punch 11 shown in FIG. 2C is completed (the pad completion state position), the pad 13 pushes the blank 15 over the secA ~ SECC, clamping the blank 15, especially by secB and pad 13 and the punch 11, SECC to.
[0064]
　Thus, generation of wrinkles in the portion to be formed on the top plate 21 in the blank 15 can be prevented. In SECD, but it holds the blank 15 by the pad 13 and the punch 11, not deform the blank 15.
[0065]
　In the molding section in the longitudinal direction of the at least one location, the molding for the first blank 15 die 14 is on standby at a minimum height above the height position of (a) the blank holder 12 is vertical wall 23 of the press-molded product 20 be initiated, or, (b) the pad 13 that first starts the molding for the blank 15, to cracks and wrinkles at the time of molding is further improved, desirable.
[0066]
　Shown in FIG. 2D, the step of pads hold is complete (pads hold position), the SECB, together with pad 13 and the punch 11 to hold the parts to be molded on the top plate 21 in the blank 15, the die 14 and the blank holder 12 is holding the part to be molded to the flange 25 in the blank 15.
[0067]
　That is, when the pad holding completion, the blank 15, secA, B, held between the die 14 and the blank holder 12 In D, is clamped by the SECB ~ punch 11 and pad 13 in D.
[0068]
　In secA, by releasing the pad 13 upwardly, upper and lower reversing section angle theta: 0 ° are ultra than 80 °. Further, the SECC, by releasing the blank holder 12 downward, the upper and lower reversing section angle theta: 0 ° are ultra than 80 °.
[0069]
　Blank 15 is a high strength material having a tensile strength of 400 ~ 2000 MPa. Therefore, the SECB, the die 14 is lowered in the second step to be described later, in order to force the surface direction acting on the portion to be molded to the flange 25 of the blank 15 is greater than the pressing force of the die 14 and the blank holder 12, blank 15 slides between the die 14 and the blank holder 12 without buckling at this portion, the portion that is molded to the flange 25 in the blank 15 is pushed into the mold outside.
[0070]
　Thus, excessive remainder is not generated in the blank 15 that exists between the pad 13 and the blank holder 12, the occurrence of the vertical wall wrinkles are prevented. That is, the present invention utilizes the tensile strength of the blank 15 is high, to prevent the occurrence of the vertical wall wrinkles.
[0071]
　Shown in FIG. 2E, the completion stage after completion of molding (molding bottom dead center position) after completion pad hold, the punch 11 and the blank holder 12, by performing the pad draw forming by using the pad 13 and the die 14, press-molded product 20 is produced.
[0072]
　In actual molding of the press part 20, at one or more points of the cross section of at least the longitudinal direction, some pad 13 and the punch 11, and die 14 and a cross-sectional portion which is not held by the blank holder 12 may be present.
[0073]
4. Upside down cross angle theta: 0 ° ultra than 80 ° in achieving means
　shown in FIG. 3 (a) is an explanatory view showing a manufacturing apparatus 10-1 having a reverse molding die upside down cross angle theta is less than 80 ° , 3 (b) is an enlarged explanatory view showing a manufacturing apparatus 10-1 partially extracted by. In the manufacturing apparatus 10-1, by setting smaller the width w of the pad 13, it turned upside down cross angle theta: 0 ° to achieve ultra than 80 °.
[0074]
　4 (a) is an explanatory view showing a manufacturing apparatus 10-2 having a reverse molding die upside down cross angle θ is less than 80 °, FIG. 4 (b), part manufacturing apparatus 10-2 is an explanatory view showing an enlarged manner extracted with. In the manufacturing apparatus 10-2, by setting narrowed away the width of the blank holder 12 from the die R part 14a of the die 14, the upper and lower reversing section angle theta: 0 ° to achieve ultra than 80 °.
[0075]
　5 (a) is an explanatory view showing a manufacturing apparatus 10-3 having a reverse molding die upside down cross angle θ is less than 80 °, FIG. 5 (b), part manufacturing apparatus 10-3 is an explanatory view showing an enlarged manner extracted with. In the manufacturing apparatus 10-3, by disposing the pad 13 upwardly, upper and lower reversing section angle theta: 0 ° to achieve ultra than 80 °.
[0076]
　Further, 6 (a) is an explanatory view showing a manufacturing apparatus 10-4 having a reverse molding die upside down cross angle θ is less than 80 °, FIG. 6 (b), the manufacturing apparatus 10-4 the is an explanatory view showing an enlarged partially extracted by. In the manufacturing apparatus 10-4, by placing the blank holder 12 downward, the upper and lower reversing section angle theta: 0 ° to achieve ultra than 80 °.
　3 to the upper and lower reversing section angle by these means shown in 6 θ: 0 ° can be achieved ultra than 80 °.
[0077]
　7 (a) is an explanatory view showing a manufacturing apparatus 10-5 having a reverse molding die upside down cross angle θ is less than 80 °, FIG. 7 (b), part manufacturing apparatus 10-5 is an explanatory view showing an enlarged manner extracted with.
[0078]
　In the manufacturing apparatus 10-5, by setting larger the curvature radius of the punch shoulder R portion 11a of the punch 11, upper and lower reversing section angle theta: 0 ° to achieve ultra than 80 °. Upside down cross angle theta: 80 ° may be set larger width w of the pad 13 within the range that can maintain the following.
[0079]
　8 (a) is an explanatory view showing a manufacturing apparatus 10-6 having a reverse molding die upside down cross angle θ is less than 80 °, FIG. 8 (b), part manufacturing apparatus 10-6 is an explanatory view showing an enlarged manner extracted with. In the manufacturing apparatus 10-6, by setting large the radius of curvature of the die R portion 14a of the die 14, the upper and lower reversing section angle theta: 0 ° to achieve ultra than 80 °. Upside down cross angle theta: 80 ° may be set wide to approximate the width of the blank holder 12 to a die R part 14a to the extent that can be maintained below.
[0080]
5. The manufacturing method according to the present embodiment
　fabrication method according to this embodiment, the punch 11 and the blank holder 12 described above, by performing press working on a blank 15 with the pad 13 and the die 14, the press-molded product 20 manufacturing. This manufacturing method includes a first step of the pad hold state, after completion of the first stage, including the punch 11 and the blank holder 12, and a second step of performing the pad draw forming by using the pad 13 and the die 14 .
[0081]
　Stage 1: holds the part to be molded in the top plate 21 in the blank 15 by the pad 13 and the punch 11, the die 14 and the blank holder 12 while holding the part to be molded to the flange 25 in the blank 15, the following satisfies the conditions 1 to 3 defined, and pad hold state.
[0082]
　(Condition 1) In certain pressing cross section that exists in the portion to be molded to the first portion 26 of the blank 15 out of the press cross section, the position in the pressing direction of the abutment surface of the blank 15 in the blank holder 12, the pad than the position in the pressing direction of the abutment surface of the blank 15 in 13, is located on the side pad 13 is present in the arrangement direction of the pad 13 and the punch 11.
[0083]
　(Condition 2) For example, FIGS. 3 (a) and 3 (b), FIGS. 4 (a) and 4 (b), FIGS. 5 (a) and 5 (b), 6 (a) and 6 (b), FIGS. 7 (a) and 7 (b), or, upside down cross angle shown by FIGS. 8 (a) and 8 (b) θ: 0 ° ultra than 80 ° of achievement means or these, the combination of achieving means, an upside-down cross-sectional angle θ to 0 ° ultra than 80 °.
[0084]
　(Condition 3) in the different press cross section of the particular press cross section of the pressing direction cross section, the position in the pressing direction of the abutment surface of the blank 15 in the pad 13, the abutting surfaces of the blank 15 in the blank holder 12 than the position in the press direction, is located on the side pad 13 is present in the arrangement direction of the pad 13 and the punch 11.
[0085]
　Phase 2: After the pads hold state in a first step, the punch 11 and the blank holder 12, by performing the pad draw forming by using the pad 13 and the die 14 to produce a press-molded article 20.
　Further, it may be performed post-processing in the press molded product 20 produced through the first and second stages.
[0086]
　Thus, the press molded article 20 according to this embodiment, without causing the top plate wrinkles and vertical wall wrinkles, can be produced by one time pressing. Further, according to this embodiment, by generating the material more than by performing the reverse rotation molding, it is also possible to reduce cracking.
[0087]
　If the difference between the height h of the vertical wall 23 of the press molded article 20 is large, it is necessary to adjust the silhouette of the pad face of the die face and the pad 13 of the die 14 in a side view. By performing the reverse form of the present, since it does not require the height adjustment of the die face and the pad surface such as by squeezing stage can improve the material yield.
Example
[0088]
　Figure 9 (a) ~ FIG. 21 (a) is a perspective view showing the shape of a press-molded article 20A ~ 20M produced in this example, FIG. 9 (b) ~ FIG. 21 (b), the press-formed product two views of 20A ~ 20M is a (top and side views). The unit of dimensions in FIG. 9 (b) ~ FIG. 21 (b) is in mm. Also, a range surrounded by a broken line in FIG. 9 (a) ~ FIG. 21 (a) shows the upside down section forming range.
[0089]
　Materials shown in Table 1 (material metal plate type, thickness, tensile strength) to the material metal plate, and the pad and the punch, by performing press molding using a mold unit having a blank holder and the upper die, the present invention examples 1 to 17 and Comparative examples 1 to 4 of the press-molded product having any shape of the press-molded product 20A ~ 20M shown in Table 1 were prepared.
[0090]
　9, the press molded article 20A of the present invention Example 1 and Comparative Example 3 has a concave curvature shape section 24 to one side when viewed. In the present invention Example 1, upper and lower reversing section angle θ using reverse molding die shown in Figure 4: 0 ° Ultra 80 ° to achieve the following.
[0091]
　10, the press-molded article 20B of the present invention Example 2 and Comparative Example 4 has a curved shape portion 24 as a straight line when viewed from the side with a convex when viewed. In Inventive Example 2, the upper and lower reversing section angle θ using reverse molding die shown in Figure 3: 0 ° Ultra 80 ° to achieve the following.
[0092]
　11, the press molded article 20C of the present invention Example 3 has a curved shape portion 24 that protrudes in a side view with a straight line in the top view. In Inventive Example 3, the upper and lower reversing section angle θ using reverse molding die shown in FIG. 5: 0 ° Ultra 80 ° to achieve the following.
[0093]
　12, the press-molded article 20D of the present invention Example 4 has a curved shape portion 24 is concave as viewed from the side with a straight line in the top view. In Inventive Example 4, the upper and lower reversing section angle θ using reverse molding die shown in Figure 6: 0 ° Ultra 80 ° to achieve the following.
[0094]
　13, the press molded article 20E of the present invention Examples 5 and 9 to 14, has a curved shape portion 24 as a straight line when viewed from the side with a concave shape in a top view. In the present invention Examples 5 and 9 to 14, upside down cross angle θ using reverse molding die shown in Figure 4: 0 ° Ultra 80 ° to achieve the following.
[0095]
　14, the press molded article 20F of the present invention Example 6 has a curved shape portion 24 that protrudes in a side view with a straight line in the top view. In Inventive Example 6, the upper and lower reversing section angle θ using reverse molding die shown in FIG. 5: 0 ° Ultra 80 ° to achieve the following.
[0096]
　15, the press molded article 20G of the present invention Example 7 has a curved shape portion 24 is concave as viewed from the side with a straight line in the top view. In Invention Example 7, the upper and lower reversing section angle θ using reverse molding die shown in Figure 6: 0 ° Ultra 80 ° to achieve the following.
[0097]
　FIG 16, T-shaped press-molded article 20H of the present invention Example 8 has a curved shape portion 24 as a straight line when viewed from the side with a concave shape in a top view. In Inventive Example 8, the upper and lower reversing section angle θ using reverse molding die shown in Figure 4: 0 ° Ultra 80 ° to achieve the following.
[0098]
　17, the press molded article 20I of Comparative Example 1 has a curved shape portion 24 is concave to the one side in a top view. Using inverse molding die shown in FIG. 4, but upside down cross angle theta: 0 ° could not achieve the ultra than 80 °.
[0099]
　18, the press molded article 20J of Comparative Example 2 has a curved shape portion 24 as a straight line when viewed from the side with a convex when viewed. Using inverse molding die shown in FIG. 3, but turned upside down cross angle theta: 0 ° could not achieve the ultra than 80 °.
[0100]
　19, the press molded article 20K of the present invention Example 15, seating surface and having a curved shape portion 24 becomes a straight line when viewed from the side with a concave shape in top view, the portion to be formed on the top plate 21 in the blank pre processing is carried out to impart. In Inventive Example 15, turned upside down cross angle θ using reverse molding die shown in Figure 4: 0 ° Ultra 80 ° to achieve the following.
[0101]
　Figure shows in 20, the press molded article 20L of the present invention Example 16 is to have a curved shape portion 24 as a straight line when viewed from the side with a concave shape in top view, has been performed restriking shaped as post-processing . In Inventive Example 16, turned upside down cross angle θ using reverse molding die shown in Figure 4: 0 ° Ultra 80 ° to achieve the following.
[0102]
　Further, shown in FIG. 21, the press-formed product 20M of the present invention Example 17 has a curved shape portion 24 as a straight line when viewed from the side with a concave shape in a top view. In the present invention 17, the upper and lower reversing section angle θ using reverse molding die shown in Figure 4: 0 ° Ultra 80 ° to achieve the following.
[0103]
　Table 1, "the longitudinal direction of the overall length as the shape of the present invention Examples 1 to 17 and Comparative Examples 1 to 4 of the press-molded product, the vertical wall height maximum value, the vertical wall heights minimum, the vertical wall heights difference, minimum value of the top plate width, the press-molded product maximum width, top view shape, side view shape, curved shape portion a radius of curvature "indicates the" upside-down cross-sectional angle theta, opposite molding die (mold used as manufacturing conditions together show a number), presence or absence of pre-processing and post-processing "in the drawings, which illustrate," flange portion as the evaluation after molding, the top plate portion, wrinkles whether evaluation of the vertical wall portion and a flange portion, the top plate portion, a vertical wall show cracks presence or absence evaluation "of the department. Incidentally, underlined in Table 1 indicates that it is outside the scope of the present invention, or the evaluation result is poor.
[0104]
[Table 1]

[0105]
　The present invention Examples 1-4, using reverse molding die shown in FIG. 4,3,5,6, was prepared by performing the pad draw forming after completing the pad holding the upside-down cross-sectional angle as 30 °. Therefore, the top plate, without even cracking or wrinkling occurred in any of the vertical wall and the flange could be satisfactorily formed.
[0106]
　Comparative Examples 1 and 2, the vertical wall with a height difference 190 mm, upper and lower reversing section angle was pads held at 85 °. For this reason, the vertical wall of the wrinkle has occurred.
[0107]
　Comparative Examples 3 and 4, without the use of reverse molding die, the upper and lower reversing section angle -20 °, was pad held as -30 °. For this reason, the wrinkles of the top plate has occurred.
[0108]
　The present invention Examples 5-8, using reverse molding die shown in FIG. 4,5,6,4, perform pad drawing after completing the pad holding the upside-down cross-sectional angle as 50,45,45,50 ° It was prepared by. Therefore, the top plate, without even cracking or wrinkling occurred in any of the vertical wall and the flange could be satisfactorily formed.
[0109]
　Inventive Examples 9-14 changes the changes and the kind of the material of the blank, using reverse molding die shown in FIG. 4, the pads hold the upside-down cross-sectional angle as 20,30,50,60,70,20 ° It was prepared by performing the pad draw forming after completing. Therefore, the top plate, without even cracking or wrinkling occurred in any of the vertical wall and the flange could be satisfactorily formed.
[0110]
　Inventive Example 15, as a pre-processing, and the upper mold was granted seating surface to the top plate by stamping forming is carried out by using a lower die having a surface which is the thickness fraction offset from the molding surface of the upper mold. Using reverse molding die shown in FIG. 4, which is produced by performing pad drawing after completing the pad holding the upside-down cross-sectional angle as 30 °. Therefore, the top plate, without even cracking or wrinkling occurred in any of the vertical wall and the flange could be satisfactorily formed.
[0111]
　Inventive Example 16, as a post-processing, and an upper mold, a case where the shape bead imparted by restriking forming is carried out by using a lower die having a surface which is the thickness fraction offset from the molding surface of the upper mold. Using reverse molding die shown in FIG. 4, which is produced by performing pad drawing after completing the pad holding the upside-down cross-sectional angle as 30 °. Therefore, the top plate, without even cracking or wrinkling occurred in any of the vertical wall and the flange could be satisfactorily formed.
[0112]
　Furthermore, the present invention example 17, using reverse molding die shown in FIG. 4, which is produced by performing pad drawing after completing the pad holding the upside-down cross-sectional angle as 40 °. Therefore, the top plate, without even cracking or wrinkling occurred in any of the vertical wall and the flange could be satisfactorily formed.
DESCRIPTION OF SYMBOLS
[0113]
Manufacturing apparatus according to the 10 present invention
11 Punch
12 blank holder
12a abutting surface
13 pads
13a abutment surfaces
14 die
15 blank
20, 20A ~ 20M press-molded product
21 top plate
22 ridge
23 vertical wall
24 curved portion
25 the flange
26 a 1 part
27 second part

WE CLAIMS

[Requested item 1]　And punch and blank holder, the use of a punch and the pad and the die are disposed to face the blank holder, it is disposed between the pad and the die and the punch and the blank holder, a tensile strength of more than 400MPa a steel plate, a method of manufacturing a press molded article by performing press working on a metal plate is an aluminum plate or aluminum alloy plate,
　the press molded article, there extends in the first direction, along the pressing direction and shape in the pressing direction cross-section intersecting the first direction, the top plate, ridge leading to the top plate, a cross-sectional shape having a flange connected to vertical wall and said vertical wall leading to the ridge, viewed from the pressing direction wherein in one or both of the side view as viewed in the direction intersecting the top view or the pressing direction Having at least one curved portion that curves in one direction, a first portion including the curved portion, and having a second portion consecutive to the first portion, of the vertical wall in said second portion minimum height, the is the first portion the vertical wall up above the height of the,
　in the first step of the pad hold state, after completion of the first stage, and the punch and the blank holder, the pad and above using a die and a second step of performing a pad drawing,
　in the pad hold state,
　the portion is formed in the top plate in the metal plate is held by said pad and said punch, and the metal the retained portion that is molded into the flange of the plate by the die and the blank holder,
　In certain pressing cross section that exists in the portion to be molded to the first portion in the metal plate of the press cross section, is located in the pressing direction of the contact surface between the metal plate in the blank holder, wherein than the position in the pressing direction of the contact surface between the metal plate in the pad, located on the side where there is the pad arrangement direction of the pad and the punch,
　the corner of the abutment surface of the pad R center of the end portion, and the and the straight line connecting the centers of the corner R edge in the abutment surface of the blank holder, turned upside down section is an acute angle formed between the extension line of the abutment surface of the metal plate in the pad with angle is less 0 ° ultra 80 °,
　in the press cross section different from the specific pressing direction section of the press cross section, it said in the pad metal Position in the pressing direction of the contact surface of the plate is, to the position at the said pressing direction of the contact surface between the metal plate in the blank holder, located on the side where there is the pad in the arrangement direction the method of the press-molded product.
[Requested item 2]
　In the first step, in the specific pressing cross section, the blank holder are available at a minimum height above the height position of the longitudinal wall, the die thereafter starts forming for the first to the metal plate the method of press-molded product produced according to claim 1.
[Requested item 3]
　In the pressing direction cross section of the at least one position of said first direction, said pad starts forming for the first to the metal plate, a method of press-molded product produced according to claim 1 or 2.
[Requested item 4]
　The metal plate material metal sheet is pre-processed intermediate workpiece, the method of the press-molded product produced according to any one of claims 1-3.
[Requested item 5]
　Performing a post molding press molded article produced by the method according to any one of claims 1 to 4, a manufacturing method of the press-molded product.
[Requested item 6]
　And punch and blank holder, comprising a pad and die are arranged to face the punch and the blank holder, wherein disposed between the punch and the blank holder and the pad and the die, the tensile strength of more than 400MPa a steel plate, an apparatus for manufacturing a press molded product by performing press working on a metal plate is an aluminum plate or aluminum alloy plate,
　the press molded article, there extends in the first direction, along the pressing direction and shape in the pressing direction cross-section intersecting the first direction, the top plate, ridge leading to the top plate, a cross-sectional shape having a flange connected to vertical wall and said vertical wall leading to the ridge, viewed from the pressing direction wherein in one or both of the side view as viewed in the direction intersecting the top view or the pressing direction Having at least one curved portion that curves in one direction, a first portion including the curved portion, and having a second portion consecutive to the first portion, of the vertical wall in said second portion minimum height, the is the first portion the vertical wall up above the height of the,
　in the first step of the pad hold state, after completion of the first stage, and the punch and the blank holder, the pad and to produce the press molded article and the die through a second step of performing a pad drawing,
　in the pad hold state,
　retaining a portion in which the pad and the punch is formed into the top plate of the metal plate and it holds the portion in which the die and the blank holder is molded to the flange in the metal plate
　In certain pressing cross section that exists in the portion to be molded to the first portion in the metal plate of the press cross section, is located in the pressing direction of the contact surface between the metal plate in the blank holder, wherein than the position in the pressing direction of the contact surface between the metal plate in the pad, located on the side where there is the pad arrangement direction of the pad and the punch,
　the corner of the abutment surface of the pad R center of the end portion, and the and the straight line connecting the centers of the corner R edge in the abutment surface of the blank holder, turned upside down section is an acute angle formed between the extension line of the abutment surface of the metal plate in the pad with angle is less 0 ° ultra 80 °,
　in the press cross section different from the specific pressing direction section of the press cross section, it said in the pad metal Position in the pressing direction of the contact surface of the plate is, to the position at the said pressing direction of the contact surface between the metal plate in the blank holder, located on the side where there is the pad in the arrangement direction , the press-molded product of the manufacturing equipment.