1]The present invention is directed to a stamping roll apparatus and method that includes adding the provided rotating roll forming a stamped structure is applied to the outer surface.
BACKGROUND
[2]In general, a number of sheet forming techniques for the production of components to be applied for automobile have been developed.
[3]First, there is a stamping (Stamping) method most commonly utilized, the stamping process is composed of the material holder disposed between the lower punch arranged at a lower side of the upper die, the upper die and the upper die and the lower punch. The upper die is a frame member portion groove hyeonghap to the shape of the molded article formed on the bottom to be formed, the lower punch is raised by driving the image side is disposed below the upper die to push the material which advances between the upper die and the lower punch upwards a member for pressing the upper die.
[4]
The stamping process is a molded article, for example, techniques that are widely used for the production of automobile parts won, recently, high-strength problems by increasing the system capacity in the steel applied and a problem that the time of molding material rupture due to high strength steel poor moldability there is.
[5]
Next, the roll forming (Roll Forming, RF) being process is there, roll forming process is configured to arrange the fixed upper and lower rotating roll sets of the multi-stage and passed through a coil or cutting the shape of the material, this between the constant cross-section while the Gini molded parts with long lengths of molding.
[6]
The roll forming method, such as by roll forming apparatus, one by utilizing the apparatus of a relatively small capacity can be applied to high-strength steel, not but be produced a molded article of uniform cross-sectional shape limitations.
[7]
[8]
This is a roll-stamping process, such as the development of Patent Document 1 bar. In the roll stamping process is a stamped structure applied to the rotating roll to rotate while the material is passing through the rotating roll is a method for performing variable-section roll forming.
[9]
[10]
However, there is a problem in that these are shape defects such as distortion due to an imbalance of the cross-section change portion, and the residual stress within the component force between each end surface portion changes occur in the same case of the roll stamping process.
[11]
[12]
(Patent Document 1) KR1417278 B
Detailed Description of the Invention
SUMMARY
[13]
The present invention to solve the imbalance of forces between the end surface parts of the residual stress change and changes in cross-sectional part and an object thereof is to provide a roll-like stamping apparatus and the method that are not defective.
Problem solving means
[14]
The present invention to achieve the above problem provides the following method and apparatus of stamping rolls.
[15]
The invention comprises a forming a stamped structure on the outer surface of the roller set is applied to the pressure on the material on both sides are continuously supplied to form the roller set, the material to rotate while facing each other so as to proceed through an embodiment, the rollers set of the plurality of dogs disposed and each molding part being formed so as to sequentially change to the material cross-section according to the material proceeds, the material, the last end roller sets previous roller set that passes by the roller set along the material travel direction forming of at least one roller set section provides the length in the circumferential direction and the forming roller is longer than the set roll-stamping device forming part of the end roller sets.
[16]
And the set of molding rollers in one embodiment may be placed within at least three from the final roller set.
[17]
In addition, the forming in one embodiment of the present invention unit can be configured on the outer surface of the two sides on the outer surface of one of the rotating rolls of the roller set of the open concave and the other one of the rotating rolls in relief corresponding to the negative.
[18]
In one embodiment of the present invention it can be formed to sequentially planarized to remove portions or convex portions formed on the concave-convex cross-section of the material in accordance with the progress of the materials forming part of the roller set.
[19]
It is formed so as to planarization to remove parts of irregularities of the material cross-section in sequence forming part of the roller set in one embodiment of the invention, and flat molding of the end roller sets, and the forming roller set portion in the widthwise direction, constant in the circumferential direction the straight section having a length and comprising at circumferential parts of the transition located on both sides around the flat portion, the flat portion and the circumferential length of the forming roller set may be longer than the circumferential length of the final roller set.
[20]
The outer surface of the roller set in one embodiment of the present invention may be added to escape through the material to another position and the molded part form.
[21]
In this case, the escape portion may be may be formed on the opposite side of the molding portion, formed to be recessed radially inward from the outer peripheral surface of the roller.
[22]
Alternatively the invention is a plurality of the molding step of the molding material is continuously supplied through the stamped structure is formed on the outer surface of the roller sets; And a cutting step of cutting the molded material, by passing through the molding step of said plurality, wherein the material is doedoe portion is changed from a first shape to a second shape, the forming step the plurality of the material of the first It provides a deformation direction opposite the material deformation roll stamping process comprising the steps of: forming deformation in shape to the second shape.
[23]
In one embodiment of the invention it is possible to re-transform the longitudinal direction both end portions of the molding material in the molding material deformation steps.
[24]
The re-modified molding step in one embodiment of the present invention may be carried out in the final shaping step.
[25]
Also, before the re-forming transformation step, a longer molding than a molding material forming a target portion, it is possible to re-deforming the both end portions in the re-forming transformation step.
[26]
After the forming step the plurality of in one embodiment of the invention, further comprising a by-pass step, a plurality of molding steps again after the bypass step may be performed to the material portion escape formed in the roller set passes through the bypass and, of the rotational speed ratio of the feed rate and the roller set of the material it may be different from each other in the by-pass stage and the molding stage.
Effects of the Invention
[27]
Roll stamping apparatus and method of the present invention can reduce shape defects by eliminating the imbalance in the forces between the cross-section change portion residual stress and the cross section changing portion.
Brief Description of the Drawings
[28]
1 is a view of a conventional roll-stamping device as shown.
[29]
2 is a plan view of a product manufactured by the conventional roll-stamping device.
[30]
3 is a view of the rolling-stamping device of the invention shown.
[31]
Figure 4 is a plan view of the step-by-step the product manufactured by the stamping roll apparatus according to the present invention;
[32]
5 is a plan view showing the product shape to be molded in the final shape of the product and the forming rollers of the roll set the stamping apparatus according to the present invention;
[33]
Figure 6 is a plan view illustrating another product shape is molded in the final shape of the product and the forming rollers of the roll set the stamping apparatus according to the present invention;
[34]
Figure 7 is a photograph of the molded product by a molding by the conventional stamping rolls and of the device, the roll-stamping device of this invention.
[35]
8 and 9 is a view showing another embodiment of roll-stamping device of this invention.
[36]
Figure 10 is a side view of the product molded by the roll-stamping device of FIGS.
[37]

[38]
10, 20, 30, 40: roller set 50: the deformation roller set
[39]
11a, 11b, 41a, 41b, 51a, 51b: the forming section
[40]
15a, 15b, 25a, 25b, 45a, 45b, 55a, 55b: escape portion
[41]
101: flat portion 102, 103: transition unit
[42]
105, 106: back part
Mode for the Invention
[43]
Hereinafter will be described with respect to specific embodiments of the invention with the attached drawings for reference.
[44]
In Fig. 1 and 2 has a conventional roll-stamping device and resulting molded product by is shown. Conventional roll stamping device Fig As shown in Figure 1, a plurality of roller sets (10, 20, 30, 40) the material is arranged along a traveling direction, each roller set (10, 20, 30, 40) is the upper roll ( 10a) and a lower roll (10b), and it is formed in a forming section (11a, 11b), each roll (10a, 10b), the molding material.
[45]
First shape, including, but each roller set (10, 20, 30, 40) are parts of the molding, As shown in Figure 1, was thus part changes forming sequentially the direction of the material, a portion of the material from the first shape prior to forming and it is thereby formed into a different second shape.
[46]
[47]
A product portion having a first shape (cross section AA, CC) and transition portions (T1, T2) is varied as a part (section BB) is molded with the second shape by the forming portion formed by such rolls stamping device It includes. To this transition section (T1, T2) are each a residual stress exists in the opposite direction, there is a problem that the twisted prior to cutting, or cutting the product.
[48]
[49]
The present invention is to avoid the removal of residual stress remaining in the transition section or at least a distortion, and will reduce the shape defect of the product, Figure 3 shows a roll-stamping device of the present invention to achieve this purpose is shown.
[50]
The roll-stamping device of this invention as shown in Figure 3 are the roller sets (10, 20, 40, 50) to urge the material (S) on both sides are continuously fed into rotation while facing each other so as to proceed through, forming the material to the forming section to a stamped structure is applied to the outer surface of the roller sets (10, 20, 40, 50) (11a, 11b, 41a, 41b, 51a, 51b) the roller set, comprising: a (10, 20, 40, 50 ) according to progress the material direction and plural dog arrangement, each formed in the roller set section being formed so as to sequentially change to the material cross-section according to the material proceeds, the material is before the final end roller set through the 40 forming part of at least one roller set (50) of the roller set (51a, 51b) is a molded portion (41a, 41b), the length in the circumferential direction is longer and shaping roller set 40 than the end roller set 40 .
[51]
[52]
4 shows a step-by-step plan view of the material that is molded by a roll-stamping device of Figure 3, Figure 4 (a) is a plan view of the material formed by the roller set 10 in Fig. 3, Fig. 4 (b) is 3 of a plan view of the molded material by the roller set 20, FIG. 4 (c) is a plan view, and Fig. 4 (d) of the material formed by the forming roller set 50 and in Figure 3 end of the 3 a plan view of the material formed by the roller set 40.
[53]
In Figure 4 (a) ~ (d) as shown the material (S) is the material that was roller sets (10, 20, 40, 50) the passage as thus cross section is hat-shaped (first shape) are sequentially by the forming section It is changed to a flat shape (the second shape).
[54]
Where the number of the shape and the roller set of the material will be illustrative, there can be reduced the number of roller sets is increased or, if necessary, the shape of the material may have a shape corresponding to the desired product is a matter of course. Further, Fig. 4 (a) to (d) in the material before molding, but is shown as having the same width, it is also possible to cut the width of the material prior to the stamping roll.
[55]
Figure 4 (a) is the plan view of the material which has passed through the first roller set (10), and forming a partial region of the material throw of the hat-shaped section (101, 102, 103). Around the flat portion 101 has a plan view of the flat outer surface of the molding region, to form the transition portion (102, 103) between the non-forming region and the flat portion 101. Figure 4 (a) the flat portion 101 of the mean area has the same cross-section irrespective of the flat cross section in the traveling direction of the material, and a transition portion (102, 103) is the area thus changing the cross-section to the direction of movement of the material It means.
[56]
[57]
Figure 4 (b) was further formed than the second roller set 20, a partial area (101, 102, 103), the first roller set (10) of the material throw of the hat-shaped cross-section as the plan view of the material passed through a (Fig. 1). However, the second roller set 20 and the first roller set 10 carries out the molding with respect to the areas of equal length (L1 = L2).
[58]
[59]
Figure 4 (c) is a plan view of a material through the forming roller set 50. A part of the material (101, 102, 103) as well as the molding is more than the second roller set, and was the length of the forming zone is longer than the second (L1 = L2 L2a). That is, as forming roller set is a by neulim the length of the straight section 101 without a change in the shape of the transition section (102, 103), and molding the material in a manner that extends the length of the entire forming area, thus the molding material is a cycle through to the final set of rollers (40) forming the target length (L4) at the back, a transition portion (102, 103) moves back, thereby forming the reverse occurs in the process.
[74]
[75]
Length (L3a, L2a) is that after passing through after passing through the second roller set and the forming roller set equal to one (L2a = L3a), transition section (102, 103) of the straight section 101 in the case of FIG. 6 the longitudinal length (L2b, L3b) is long, the sum of the length of the transition section (102, 103) of the set of forming rollers as the forming region longer (ΣL3a> ΣL2a).
[76]
And by the shape of the forming roller set is a flat portion 101, neulim the length of the transition section (102, 103) without a change, and forming the material in a manner that extends the entire length of the molding region, so as the molding material is the final cycle through the roller set 40 target forming length (L4) back in, some return portion of the transition section (102, 103); and a (105, 106 See Fig. 4), the station formed is generated in the process, .
[77]
[78]
Figure 7 (a) has a picture of a material formed by a conventional roll-stamping device is shown. This material is not twisted not attached to the floor as shown in Figure 7 (a). In other words, the distortion occurred in the material residual stress in the opposite direction due to each other in a plurality of the transition portion in the case of molding a material by the conventional roll-stamping device.
[79]
7 (b) has a picture of the molded material by a stamping roll according to the present invention is shown. As it is shown also do this, the molding material by a stamping roll according to the present invention in the 7 (b) The material can be seen that attached to the floor without distortion.
[80]
8 and 9, there is shown an alternative embodiment of a roll-stamping device of this invention.
[81]
8 and other embodiments of the nine patients are one of a roller set (10, 20, 40, 50) having parts of the same molding as the embodiment shown in Figure 3, the roller set (10, 20, 40, 50) are each formed has an escape part (15a, 15b, 25a, 25b, 45a, 45b, 55a, 55b) on the side opposite to the unit is different in this regard.
[82]
Escape section (15a, 15b, 25a, 25b, 45a, 45b, 55a, 55b) has a structure formed is recessed inward from the circumference of the roll, the forming section (11a, 11b, 41a, 41b, 51a, 51b in this embodiment ) it is formed on the opposite side of.
[83]
Fig. As shown in 9, roller sets (10, 20, 40, 50) according to the rotation of the roll, the amount of roller escape portion (15a, 15b, 25a, 25b, 45a, 45b, 55a, 55b) are facing each other disposed and, at this time, the material (S) passing through the roller sets (10, 20, 40, 50) can pass without any molding. Since the escape section (15a, 15b, 25a, 25b, 45a, 45b, 55a, 55b) are formed on predetermined areas on the outer circumference of the roller, it may not be in the predetermined period with a molding made from the rotation of the roller.
[84]
[85]
Roller set in this example (10, 20, 40, 50) escape with the forming section (11a, 11b, 41a, 41b, 51a, 51b) portions (15a, 15b, 25a, 25b, 45a, 45b, 55a, since the 55b) are formed, in a predetermined period, and the molding material (S), the predetermined period may by-pass the material (S).
[86]
In particular, since the escape section (15a, 15b, 25a, 25b, 45a, 45b, 55a, 55b) is when facing does not abut with the roller sets (10, 20, 40, 50) and the material (S), the material ( S) a may be faster than movement in molding, therefore, it is the forming section (L4, L6; even if the distance between the reference Fig. 10) can be changed without changing the forming roller set.
[87]
[88]
10, there is shown a molding material (S) in accordance with the embodiment of Figures 8 and 9. A forming section (L4, L6) is a feed rate of the material (S) (m / min), the time to be constant, at the time of forming the rotational speed (rev / min) of the roller sets (10, 20, 40, 50) is constant to but held, slows the rotational speed of the specific growth hyeongsi, especially escape section (15a, 15b, 25a, 25b, 45a, 45b, 55a, 55b) the roller sets (10, 20, 40, 50) while facing each other or quickly by controlling, it is possible to adjust the length of the non-forming section (L5, L7). That is, while by making the feeding rate of the molding material and the rotational speed of the roller set of the ratio different from the rotational speed of the feed rate and the roller set of the material in the non-forming, of parts of the same molding, the overall length can be formed a different product have.
[89]
Thereby, the length of the forming roll portions this embodiment it is also possible to manufacture the various parts. In particular, it is possible, but this section is molded to the predetermined length, forming a door impact beam of a different conductor of a roll-stamping device in the case of configuration such as a variety of door impact beams.
[90]
[91]
In the above it has been described mainly to embodiments of the present invention, that the present invention can be used in variously changed without being limited thereto, of course.

Claims

[Claim 1]Roller set to rotate continuously while facing each other so as to progress between the pressure on the material on both sides is supplied to, so as to molding the material, and comprising a forming a stamped structure is applied to the outer surface of the roller set, the roller set along the material travel direction a plurality dog ​​arrangement, the progress of the material, each forming part of the roller set, thus being formed so as to change the material cross-section in sequence, the material is finally passed through a final roller set prior to the forming of the at least one roller set of rollers set unit to a rolled stamping apparatus, the length in the circumferential direction from the forming section of the end roller set longer and shaping roller set.
[Claim 2]
The method of claim 1 wherein the forming roller and sets the roll-stamping device that is arranged within at least three from the final roller set.
[Claim 3]
According to claim 1 or 2, wherein the molded part being configured in relief on the outer surface of the two sides on the outer surface of one of the rotating rolls of the roller set of the open concave and the other one of the rotating rolls corresponding to the negative roll stamping device as.
[Claim 4]
The method of claim 3, wherein the roll-stamping device characterized in that the uneven portion is formed sequentially to the end face of the material in accordance with the progress of the materials forming part of the roller set, or formed to planarize the concave-convex portion removed.
[Claim 5]
The method of claim 1 or 2, wherein the molding of the roller set portion being formed to flattened by removing parts of the material surface irregularities of cross-section in sequence, and flat molding of the end roller sets, and the forming roller set portion in the width direction, the circumferential in the flat portion and the circumferential direction has a predetermined length in the direction and the transition including a positioned at both sides in the center of the flat portion, the flat portion circumferential direction length of the the forming roller set, than the circumferential length of the flat portion the end roller set roll stamping wherein long.
[Claim 6]
The method of claim 1 or 2, wherein the flat to the the forming of the forming roller set portion in the width direction and comprises in the flat portion and the circumferential direction has a predetermined length in the circumferential direction of parts of the transition located at the both sides in the center of the flat portion, roll stamping device, it characterized in that the transition portion and the circumferential length of the forming roller set, is longer than the circumferential length of the transition section the end roller set.
[Claim 7]
The method of claim 1, wherein the outer surface of the roller set, the roll stamping device characterized in that the additional flight to pass the material to another position and the molded part is formed.
[Claim 8]
The method of claim 7, wherein the roll-stamping device, characterized in that the escape portion is formed on the opposite side of the molding portion.
[Claim 9]
The method of claim 8, wherein said escape unit roll stamping device, characterized in that formed recessed radially inward from the outer peripheral surface of the roller.
[Claim 10]
A plurality of molding steps of the molding material is continuously supplied to the stamping through the structure formed in the outer surface of the roller sets; And a cutting step of cutting the molded material, by passing through the molding step of said plurality, wherein the material is doedoe portion is changed from a first shape to a second shape, the forming step the plurality of the material of the first Embossing roll method in shape; and a deformation direction opposite to the inverse transformation step of molding strain in a second shape.
[Claim 11]
11. The method of claim 10, roll-stamping method, comprising a step of forming the inverse transformation step the inverse transform the material at least longitudinal both end portions of the molding.
[Claim 12]
11. The method of claim 10, wherein the inverse transformation step is a roll forming method for stamping being carried out in the middle of all subsequent forming steps.
[Claim 13]
11. The method of claim 10, wherein the inverse transformation prior to the molding step, the molding and hold the molding of the material than a target forming section, roll-stamping method, comprising a step of deforming the both end portions at the reverse inverse transformation shaping step.
[Claim 14]
In the reverse transformation by molding beyond the second shaped portion of the molding material before the molding step, roll-stamping characterized in that the molding station to the second configuration forming part of the material at the deformation station of claim 11 wherein the molding step.
[Claim 15]
11. The method of claim 10, characterized in that after the plurality of the forming step, further comprising a bypass step of flight portion passing through the material by-pass formed in the roller set, and a plurality of molding steps again after the bypass step performed roll stamping method as.
[Claim 16]
The method of claim 15, wherein the rotational speed ratio of the feed rate and the roller set of the material is roll-stamping method from the bypass step and the shaping step wherein the different from each other.