Automobile structural part flanging die and automobile structural part forming device

Abstract

The application provides an automobile structure part flanging die and an automobile structure part forming device. The automobile structure part flanging die comprises an upper die base, an upper flanging assembly, a lower die base and a lower flanging assembly, the upper flanging assembly is fixedly connected to the upper die base, the lower flanging assembly is fixedly connected to the lower die base, the upper flanging assembly and the lower flanging assembly are oppositely arranged and are used for flanging a steel plate together, a position-avoiding notch is arranged at one end of the upper flanging assembly adjacent to the lower flanging assembly, the automobile structure part flanging die further comprises a springback suppression mechanism, a movable end of the springback suppression mechanism is movably arranged in the position-avoiding notch, and the movable end of the springback suppression mechanism is used for pushing the inner bend of the edge of the flanged steel plate when the upper flanging assembly and the lower flanging assembly are closed. Thus, the automobile structure part flanging die can be used to form the automobile structure part with a right-angle flanging angle, the forming efficiency of the automobile structure part is improved, one set of shaping die is reduced, and the formed structure is relatively simple.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of molds, in particular to a flanging die for an automobile structural part and an automobile structural part forming device. BACKGROUND

[0002] A flanging die refers to a forming die that makes the edge of a flat or curved part of a blank stand up as a straight edge along a certain curve. The forming raw material of a general automobile structural part is a steel plate, and the structure of the automobile structural part is relatively complex, and most automobile structural parts need to be flanged by a flanging die.

[0003] When the edge structure of the automobile structural part is complex and the required steel plate has high strength, the steel plate will have a large amount of springback after flanging, so that the bending angle of the edge of the automobile structural part does not meet the design requirements. In order to solve the problem of large springback, the steel plate is generally flanged by over-flanging, that is, the bending angle of the edge of the actual steel plate is greater than the design angle, so that the edge of the steel plate meets the design requirements after springback.

[0004] However, for an automobile structural part with a right-angle flanging angle, a complex edge structure, and a high-strength steel plate, over-flanging will cause the bending angle of the edge of the steel plate to be greater than 90°, and since the upper flanging assembly moves up and down, the upper flanging assembly will collide with the lower flanging assembly, that is, the flanging die at this time cannot over-flange.

[0005] Therefore, in the conventional technology, the steel plate needs to be shaped after flanging, that is, the steel plate needs to be sequentially stamped by a flanging die and a shaping die to eliminate the springback of the steel plate after flanging, so that the bending angle of the edge of the automobile structural part meets the design requirements. For example, the flanging die for the back plate of the automobile seat backrest disclosed in the Chinese Utility Model Patent No. CN218134273U inserts the edge pressing protrusion of the upper die seat into the die cavity of the lower die seat, thereby facilitating the completion of the flanging of the back plate. If the flanging die is used to form an automobile structural part with a high-strength steel plate, a complex edge structure, and a right-angle flanging angle, the edge of the steel plate will have a large amount of springback, and the steel plate needs to be shaped by a shaping die after flanging to eliminate the springback of the steel plate after flanging, so that the bending angle of the edge of the automobile structural part meets the design requirements.

[0006] In summary, in order to produce an automobile structural part with a high-strength steel plate, a complex edge structure, and a right-angle flanging angle, the conventional technology needs to first flange by a flanging die and then shape by a shaping die, that is, flanging and shaping are sequentially performed by two sets of dies, which reduces the forming efficiency of the automobile structural part and results in a large number of forming dies. SUMMARY

[0007] The automobile structure part flanging die and the automobile structure part forming equipment can reduce the forming efficiency and the flanging die of the automobile structure part.

[0008] The application aims at overcoming the defects in the prior art and providing an automobile structure part flanging die and an automobile structure part forming equipment.

[0009] The automobile structure part flanging die comprises an upper die base, an upper flanging assembly, a lower die base and a lower flanging assembly, the upper flanging assembly is fixedly connected to the upper die base, the lower flanging assembly is fixedly connected to the lower die base, the upper flanging assembly and the lower flanging assembly are oppositely arranged and are used for flanging a steel plate together, an avoiding gap is formed in one end of the upper flanging assembly adjacent to the lower flanging assembly, and the automobile structure part flanging die further comprises a rebound suppression mechanism, a movable end of the rebound suppression mechanism is movably arranged in the avoiding gap, and the movable end of the rebound suppression mechanism is used for pushing the edge of the flanged steel plate inward when the upper flanging assembly and the lower flanging assembly are closed.

[0010] In one embodiment, the rebound suppression mechanism comprises:

[0011] a guide block fixedly connected to the lower die base, the guide block is formed with a slanting limiting guide groove;

[0012] a sliding block movably arranged in the avoiding gap, part of the sliding block is slidably arranged in the slanting limiting guide groove, and the sliding direction of the sliding block is inclined to the moving direction of the upper flanging assembly; and

[0013] an elastic assembly installed on the lower die base, the elastic assembly is further elastically abutted to the sliding block, and the elastic assembly is used for pushing the sliding block to slide so as to separate the sliding block from the edge of the steel plate;

[0014] wherein, the lower end surface of the upper flanging assembly is oppositely arranged with the sliding block, the upper flanging assembly pushes the sliding block to compress the elastic assembly and slide when the upper flanging assembly is closed, so that the sliding block pushes the edge of the flanged steel plate inward.

[0015] In one embodiment, the sliding block has a sliding part, and the sliding part is slidably arranged in the slanting limiting guide groove.

[0016] In one embodiment, the sliding part is formed with a limiting gap, the guide block is formed with an avoiding hole, the rebound suppression mechanism further comprises a limiting piece, the limiting piece is arranged through the limiting gap and the avoiding hole, and the limiting piece is further threadedly connected to the lower die base.

[0017] In one embodiment, one end of the limiting piece is completely accommodated in the avoiding gap.

[0018] In one of the embodiments, the oblique limiting guide groove is a dovetail groove, and the sliding part is a dovetail convex part.

[0019] In one of the embodiments, the guide block is further formed with an oblique rectangular sliding groove, which is communicated with the oblique limiting guide groove, and another part of the sliding block is slidingly connected to the groove wall of the oblique rectangular sliding groove.

[0020] In one of the embodiments, the elastic assembly is a spring pin.

[0021] In one of the embodiments, the lower end of the upward turning edge assembly is provided with a pushing surface, and the upper end of the sliding block is provided with a stress surface, and the pushing surface and the stress surface are attached to each other when the upward turning edge assembly pushes the sliding block.

[0022] An automobile structural part forming device, comprising the automobile structural part turning edge die of any one of the above embodiments.

[0023] Compared with the prior art, the automobile structural part turning edge die has at least the following advantages:

[0024] The automobile structural part turning edge die has the following advantages: the rebound suppression mechanism pushes the edge corresponding to the position avoiding gap in the steel plate to bend inward during turning edge, i.e. the rebound suppression mechanism pushes the edge with complex structure in the steel plate to bend inward during turning edge, so that the edge with complex structure in the steel plate is excessively bent after turning edge, i.e. the bending angle is greater than 90 degrees. After the rebound suppression mechanism and the upward turning edge assembly are reset, the edge with complex structure in the steel plate rebounds, so that the turning edge angle of the edge with complex structure in the steel plate is 90 degrees. In this way, even if the edge structure of the steel plate is complex, i.e. the rebound amount of the edge of the steel plate is large, the automobile structural part turning edge die can form the automobile structural part with a right-angle turning edge, improves the forming efficiency of the automobile structural part, and reduces a set of shaping die, so that the structure is relatively simple. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0026] Figure 1 It is a structural schematic diagram of the automobile structural part turning edge die of an embodiment;

[0027] Figure 2 It is a structural schematic diagram of the automobile structural part turning edge die of an embodiment; Figure 1 It is a structural schematic diagram of the automobile structural part turning edge die of an embodiment;

[0028] Figure 3 for Figure 1 Another partial structural schematic diagram of the automotive structural component flanging mold shown;

[0029] Figure 4 for Figure 1 Another partial structural schematic diagram of the automotive structural component flanging mold shown;

[0030] Figure 5 for Figure 1 Another partial structural schematic diagram of the automotive structural component flanging mold shown;

[0031] Figure 6 for Figure 1 Another partial structural schematic diagram of the automotive structural component flanging mold shown;

[0032] Figure 7 A cross-sectional view of a partial structure of an automotive structural component flanging die according to another embodiment;

[0033] Figure 8 for Figure 7 The diagram shows an enlarged view of the automotive structural component flanging mold at point A. Detailed Implementation

[0034] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0035] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0037] The application provides a flanging die for an automobile structural part, comprising an upper die seat, an upper flanging assembly, a lower die seat and a lower flanging assembly, the upper flanging assembly is fixedly connected to the upper die seat, the lower flanging assembly is fixedly connected to the lower die seat, the upper flanging assembly and the lower flanging assembly are oppositely arranged and are used for flanging a steel plate together, an avoiding gap is formed at one end of the upper flanging assembly adjacent to the lower flanging assembly, and the flanging die for the automobile structural part further comprises a springback suppression mechanism, a movable end of the springback suppression mechanism is movably arranged in the avoiding gap, and the movable end of the springback suppression mechanism is used for pushing the edge of the flanged steel plate inward when the upper flanging assembly and the lower flanging assembly are closed.

[0038] The flanging die for the automobile structural part has the advantages that the springback suppression mechanism pushes the edge corresponding to the avoiding gap 201 of the steel plate inward during flanging, that is, the springback suppression mechanism pushes the edge with a complex structure of the steel plate inward during flanging, so that the edge with the complex structure of the steel plate is excessively bent after flanging, that is, the bending angle is greater than 90 degrees. After the springback suppression mechanism and the upper flanging assembly are reset, the edge with the complex structure of the steel plate rebounds, so that the flanging angle of the edge with the complex structure of the steel plate is 90 degrees. In this way, even if the edge structure of the steel plate is complex, that is, the rebounding amount of the edge of the steel plate is large, the flanging die for the automobile structural part can form the automobile structural part with a right-angle flanging angle, the forming efficiency of the automobile structural part is improved, and a set of sizing die is reduced, so that the formed structure is relatively simple.

[0039] In order to better understand the technical scheme and beneficial effects of the application, the application is further described in detail below in combination with specific embodiments.

[0040] As shown in Figures 1 to 4 An embodiment of the flanging die for the automobile structural part 10 comprises an upper die seat 100, an upper flanging assembly 200, a lower die seat 300 and a lower flanging assembly 400, the upper flanging assembly 200 is fixedly connected to the upper die seat 100, the lower flanging assembly 400 is fixedly connected to the lower die seat 300, the upper flanging assembly 200 and the lower flanging assembly 400 are oppositely arranged and are used for flanging a steel plate together, an avoiding gap 201 is formed at one end of the upper flanging assembly 200 adjacent to the lower flanging assembly 400, and the flanging die for the automobile structural part 10 further comprises a springback suppression mechanism 500, a movable end of the springback suppression mechanism 500 is movably arranged in the avoiding gap 201, and the movable end of the springback suppression mechanism 500 is used for pushing the edge of the flanged steel plate inward when the upper flanging assembly 200 and the lower flanging assembly 400 are closed. In this embodiment, the upper flanging assembly 200 and the lower flanging assembly 400 are oppositely arranged in the up-down direction, wherein the upper flanging assembly 200 moves up and down to realize the closing and opening of the die.

[0041] As shown in Figure 3 and Figure 4As shown, further, when the flanging, first, the steel plate is placed on the lower flanging assembly 400, then the upper flanging assembly 200 goes down, so that the upper flanging assembly 200 bends the edge of the steel plate downward, then as the upper flanging assembly 200 continues to move down, the edge of the steel plate corresponding to the avoidance gap 201 will be located between the lower flanging assembly 400 and the springback suppression mechanism 500, at this time the springback suppression mechanism 500 pushes the edge of the steel plate corresponding to the avoidance gap 201 to bend inward, then as the upper flanging assembly 200 continues to move down, the upper flanging assembly 200 and the lower flanging assembly 400 will be closed, at this time the bending angle of the edge of the steel plate pushed by the springback suppression mechanism 500 is greater than the bending angle of the edge of the steel plate not pushed by the springback suppression mechanism 500, that is, the bending angle of the edge of the steel plate not pushed by the springback suppression mechanism 500 is 90 degrees, the bending angle of the edge of the steel plate pushed by the springback suppression mechanism 500 is greater than 90 degrees, then the upper flanging assembly 200 moves up and resets, at the same time the springback suppression mechanism 500 separates from the edge of the steel plate and resets, then the edge of the steel plate corresponding to the avoidance gap 201 will spring back, so that the bending angle of the edge is 90 degrees, to form the automobile structural part.

[0042] It can be understood that the structure of the edge of the steel plate corresponding to the avoidance gap 201 after flanging is relatively complex, resulting in a larger springback amount of the edge, therefore, in the embodiment, the springback suppression mechanism 500 only pushes the edge of the steel plate corresponding to the avoidance gap 201 to increase the bending angle of the edge with a relatively complex structure, and further suppress the adverse effects of springback on the precision of the automobile structural part.

[0043] It should be noted that the strength of the steel plate of the present application is higher, which refers to the grade Q460 steel. The flanging angle of the automobile structural part of the present application is 90 degrees, that is, the final bending angle of all edges of the steel plate is 90 degrees.

[0044] The automobile structural part flanging die 10 described above, because the springback suppression mechanism 500 pushes the edge of the steel plate corresponding to the avoidance gap 201 to bend inward during flanging, that is, the springback suppression mechanism 500 pushes the edge of the steel plate with a relatively complex structure to bend inward during flanging, so that the edge of the steel plate with a relatively complex structure is excessively bent after flanging, that is, the bending angle is greater than 90 degrees. When the springback suppression mechanism 500 and the upper flanging assembly 200 reset, the edge of the steel plate with a relatively complex structure will spring back, so that the flanging angle of the edge of the steel plate with a relatively complex structure is 90 degrees. In this way, even if the edge structure of the steel plate is relatively complex, that is, the springback amount of the edge of the steel plate is larger, the automobile structural part flanging die 10 can form an automobile structural part with a flanging angle of a right angle, improving the forming efficiency of the automobile structural part and reducing a set of sizing die, so that the formed structure is relatively simple.

[0045] As Figures 3 to 6As shown, in one of the embodiments, the rebound suppression mechanism 500 includes a guide block 510, a sliding block 520, and an elastic assembly 530, wherein the guide block 510 is fixedly connected to the lower die seat 300, the guide block 510 is formed with a slanting limiting guide groove 511, the extension direction of the slanting limiting guide groove 511 is inclined to the moving direction of the upper flanging assembly 200. The sliding block 520 is movably arranged in the avoidance gap 201, part of the sliding block 520 is slidably arranged in the slanting limiting guide groove 511, so that the slanting limiting guide groove 511 guides the movement of the sliding block 520, and the sliding direction of the sliding block 520 is inclined to the moving direction of the upper flanging assembly 200. The elastic assembly 530 is installed on the lower die seat 300, and the elastic assembly 530 also elastically abuts against the sliding block 520, and the elastic assembly 530 is used to push the sliding block 520 to slide, so that the sliding block 520 is separated from the edge of the steel plate.

[0046] As shown, Figures 3 to 6 In this embodiment, the lower end surface of the upper flanging assembly 200 is arranged opposite to the sliding block 520, and the upper flanging assembly 200 pushes the sliding block 520 to compress the elastic assembly 530 and slide when closing, so that the sliding block 520 pushes the edge of the flanged steel plate to bend inward. Further, the edge of the steel plate that is staggered with the avoidance gap 201 is the first edge, and the edge of the steel plate corresponding to the avoidance gap 201 is the second edge, and the complexity of the structure of the second edge after shaping is greater than that of the first edge after shaping.

[0047] As shown, Figures 2 to 4 Further, during flanging, first, the upper flanging assembly 200 moves downward, so that the part of the upper flanging assembly 200 which is not provided with the avoidance gap 201 pushes the first edge of the steel plate to bend downward, at this time, the first edge of the steel plate bends downward and drives the second edge of the steel plate to bend downward, and the part of the upper flanging assembly 200 which is provided with the avoidance gap 201 pushes the sliding block 520 to compress the elastic assembly 530 and slide, so that the sliding block pushes the second edge to bend inward, then, as the upper flanging assembly 200 continues to move downward, the upper flanging assembly 200 and the lower flanging assembly 400 will be closed, and at the same time, the sliding block 520 will stop pushing the second edge to bend inward, at this time, the bending angle of the second edge is greater than that of the first edge, specifically, the bending angle of the second edge of the steel plate is greater than 90 degrees, then the upper flanging assembly 200 resets, so that the upper flanging assembly 200 is separated from the steel plate and the sliding block 520, then the elastic assembly 530 elastically recovers to push the sliding block 520 away from the second edge and reset, then the second edge of the steel plate rebounds, so that the flanging angle of the second edge, i.e. the edge of the steel plate with more complex structure, is 90 degrees. In this way, the rebound suppression mechanism 500 suppresses the adverse effects of the rebound of the second edge on the product precision.

[0048] As shown, Figure 3As shown in the drawings, in one embodiment, the sliding block 520 has a sliding portion 521 which is slidably arranged in the oblique limiting guide groove 511 to guide the movement of the sliding block 520 by the oblique guide groove.

[0049] As shown in the drawings, Figure 3 In one embodiment, the sliding portion 521 forms a limiting gap 512, the guide block 510 forms an avoiding hole, and the rebound suppression mechanism 500 further comprises a limiting member which is arranged in the limiting gap 512 and the avoiding hole and is threadedly connected to the lower die seat 300. In this embodiment, when the elastic assembly 530 pushes the sliding block 520 to separate from the product to a certain distance, i.e. the sliding block 520 is obliquely slid to a certain distance, the limiting member abuts against the inner wall of the limiting gap 512, so that the limiting member blocks the sliding block 520 from continuing to obliquely slide upward, avoiding the sliding block 520 from sliding out of the oblique limiting guide groove 511, and ensuring that the oblique limiting guide groove 511 can continue to guide the sliding block 520.

[0050] As shown in the drawings, Figure 3 In one embodiment, one end of the limiting member is completely accommodated in the avoiding gap 201 to avoid the upper flanging assembly 200 from contacting the limiting member when pushing the sliding block 520, i.e. to avoid the limiting member from blocking the upper flanging assembly 200 from pushing the sliding block 520.

[0051] As shown in the drawings, Figure 3 In one embodiment, the oblique limiting guide groove 511 is a dovetail groove, and the sliding portion 521 is a dovetail convex portion, so that the sliding portion 521 can only be slidably arranged in the oblique limiting guide groove 511, improving the guiding accuracy of the oblique limiting guide groove 511.

[0052] As shown in the drawings, Figure 3 In one embodiment, the guide block 510 further forms an oblique rectangular sliding groove 513 which is in communication with the oblique limiting guide groove 511, and another part of the sliding block 520 is slidably connected to the groove wall of the oblique rectangular sliding groove 513, increasing the contact area between the sliding block 520 and the guide block 510, improving the sliding stability of the sliding block 520, and further improving the service life of the sliding block 520 and the guide block 510.

[0053] As shown in the drawings, Figure 4 In one embodiment, the elastic assembly 530 is a spring pin. One end surface of the elastic assembly 530 is in contact with the lower end surface of the sliding block 520, so that the contact area between the elastic assembly 530 and the sliding block 520 is large, and the abrasion of the elastic assembly 530 to the sliding block 520 is suppressed.

[0054] As shown in the drawings, Figure 6As shown, in one embodiment, the lower end of the upper flanging assembly 200 is provided with a pushing surface 202, and the upper end of the sliding block 520 is provided with a force receiving surface 522. The pushing surface 202 and the force receiving surface 522 are in contact when the upper flanging assembly 200 pushes the sliding block 520, so as to reduce the abrasion of the sliding block 520 and the upper flanging assembly 200.

[0055] However, when the structure after the second edge is shaped is too complex, for example, when the second edge is shaped to form more grooves, protruding structures, etc., or when the thickness of the steel plate is greater than a certain value, for example, when the thickness of the steel plate is greater than 10 mm, since the sliding block 520 is immediately separated from the second edge when the sliding block 520 moves on the upper flanging assembly 200, the time for the sliding block 520 to keep the second edge in excess bending is short, which results in that the rebound amount of the second edge is still large, that is, the bending angle of the rebound of the second edge is less than 90 degrees.

[0056] In order to solve the above technical problems, as shown in the accompanying drawings, Figure 7 As shown, in another embodiment, the rebound suppression mechanism 500 further comprises a pressure maintaining assembly 540, the pressure maintaining assembly 540 is installed on the lower die seat 300, the guide block 510 is formed with a pressure maintaining avoiding hole 5101, and the power output end of the pressure maintaining assembly 540 passes through the pressure maintaining avoiding hole 5101 and is in separable connection with the sliding block 520. In this embodiment, after the upper flanging assembly 200 and the lower flanging assembly 400 are closed, the power output end of the pressure maintaining assembly 540 acts to make the power output end of the pressure maintaining assembly 540 abut against the sliding block 520. After the upper flanging assembly 200 and the lower flanging assembly 400 are separated, since the power output end of the pressure maintaining assembly 540 abuts against the sliding block 520, the sliding block 520 will not be separated from the second edge, so that the sliding block 520 continuously abuts against the second edge. After the power output end of the pressure maintaining assembly 540 abuts against the sliding block 520 for a certain time, the power output end of the pressure maintaining assembly 540 acts to make the power output end of the pressure maintaining assembly 540 separated from the sliding block 520, so as to make the elastic assembly 530 elongate and push the sliding block 520 to separate from the second edge and reset. In this way, the sliding block 520 can continuously abut against the second edge after the upper flanging assembly 200 and the lower flanging assembly 400 are separated, so that the time for the second edge to be in excess bending is long, and the rebound of the second edge is reduced.

[0057] It can be understood that the time for the power output end of the pressure maintaining assembly 540 to abut against the sliding block 520 depends on the rebound of the second edge, which can be confirmed by multiple debugging.

[0058] It should be noted that if the sliding block 520 is immediately separated from the second edge when the sliding block 520 moves on the upper flanging assembly 200, the problem of the rebound amount of the second edge being too large will not occur, and the power output end of the pressure maintaining assembly 540 is always not connected with the sliding block 520.

[0059] As shown in the accompanying drawings, Figure 7As shown, in one embodiment, the pressure maintaining assembly 540 comprises a linear drive 541 and a pressure maintaining rod 542. The linear drive 541 is installed on the lower die seat 300. The first end of the pressure maintaining rod 542 is fixedly connected to the power output end of the linear drive 541. The pressure maintaining rod 542 is arranged in the pressure maintaining avoiding hole 5101 and is detachably connected with the sliding block 520. In this embodiment, after the upper flanging assembly 200 and the lower flanging assembly 400 are closed, the power output end of the linear drive 541 is actuated to make the pressure maintaining rod 542 abut against the sliding block 520. After the upper flanging assembly 200 and the lower flanging assembly 400 are separated, the sliding block 520 cannot be separated from the second edge due to the abutment of the pressure maintaining rod 542 against the sliding block 520, so that the sliding block 520 continuously abuts against the second edge. After the pressure maintaining rod 542 abuts against the sliding block 520 for a certain time, the power output end of the linear drive 541 is actuated to make the pressure maintaining rod 542 separate from the sliding block 520, so that the elastic assembly 530 is elongated and pushes the sliding block 520 to separate from the second edge and reset. In this way, the sliding block 520 can continuously abut against the second edge after the upper flanging assembly 200 and the lower flanging assembly 400 are separated, so that the time for which the second edge is excessively bent is prolonged, and the rebound of the second edge is reduced.

[0060] It can be understood that the linear drive 541 can be a pneumatic cylinder, a hydraulic cylinder, an electric motor or other existing linear drives.

[0061] In order to detachably connect the pressure maintaining rod 542 with the sliding block 520, as shown in Figure 7 In one embodiment, one side of the sliding block 520 is provided with an abutment hole 5201. The pressure maintaining rod 542 is movably arranged in the pressure maintaining avoiding hole 5101 and is movably sleeved with the sliding block 520. In this embodiment, the pressure maintaining rod 542 is matched with the abutment hole 5201. When it is needed to make the pressure maintaining rod 542 abut against the sliding block 520, the linear drive 541 drives the pressure maintaining rod 542 to penetrate into the abutment hole 5201 and be sleeved with the sliding block 520, i.e. the pressure maintaining rod 542 abuts against the inner wall of the abutment hole 5201, so that the pressure maintaining rod 542 limits the sliding block 520, and the sliding block 520 can still abut against the second edge of the steel plate after being moved upward on the upper flanging assembly 200. When it is needed to separate the pressure maintaining rod 542 from the sliding block 520, the linear drive 541 drives the pressure maintaining rod 542 to move away from the abutment hole 5201, so that the elastic assembly 530 pushes the sliding block 520 to separate from the second edge of the steel plate.

[0062] In order to improve the smoothness of the pressure maintaining rod 542 entering the abutment hole 5201, as shown in Figure 7 and Figure 8 In one embodiment, the opening edge of the abutment hole 5201 has a circular arc transition surface to increase the opening of the abutment hole 5201.

[0063] It can be understood that when the pressure maintaining rod 542 leaves the abutting hole 5201, the sliding block 520 has a tendency to slide in the oblique limiting guide groove 511 due to the elastic assembly 530 pushing the sliding block 520, so that the pressure maintaining rod 542 is subjected to a greater frictional resistance of the sliding block 520 when leaving the abutting hole 5201, so that the wear of the pressure maintaining rod 542 and the sliding block 520 is greater, and thus the limiting effect of the pressure maintaining rod 542 on the sliding block 520 is at risk of deterioration.

[0064] In order to reduce the frictional resistance of the sliding block 520 acting on the pressure maintaining rod 542, as shown in Figure 7 and Figure 8 , in one embodiment, the extension direction of the pressure maintaining rod 542 is inclined to the sliding direction of the sliding block 520, so that the direction of the force of the sliding block 520 acting on the pressure maintaining rod 542 is inclined to the direction of the pressure maintaining rod 542 leaving the abutting hole 5201.

[0065] It can be understood that at the moment when the pressure maintaining rod 542 leaves the abutting hole 5201, the elastic assembly 530 pushes the sliding block 520 to slide, so that the sliding block 520 is adjacent to the outer wall of the abutting hole 5201. There is a risk of collision or scratching with the second end of the pressure maintaining rod 542, resulting in a risk of bending of the pressure maintaining rod 542.

[0066] In order to alleviate the impact of the sliding block 520 on the second end of the pressure maintaining rod 542, as shown in Figure 8 , in one embodiment, the pressure maintaining rod 542 includes a rod body 5421 and a buffer pad 5422, the first end of the rod body 5421 is fixedly connected to the power output end of the linear drive 541, the buffer pad 5422 is connected to the second end face of the rod body 5421, the rod body 5421 is movably arranged in the pressure maintaining limiting hole 5101, and the rod body 5421 is movably arranged in the abutting hole 5201 and movably sleeved with the sliding block 520. In this embodiment, when the sliding block 520 scratches or the nozzle pressure maintaining rod 542, the outer side of the sliding block 520 contacts the buffer pad 5422, which alleviates the impact of the sliding block 520 on the pressure maintaining rod 542 and inhibits the deformation of the pressure maintaining rod 542, so as to ensure that the pressure maintaining rod 542 can continue to extend into the abutting hole 5201 subsequently. Further, the outer side of the sliding block 520 is in contact with the outer side of the buffer pad 5422 after the pressure maintaining rod 542 leaves the abutting hole 5201, that is, the sliding surface of the sliding block 520 at the lower end is in contact with the outer side of the buffer pad 5422 after the pressure maintaining rod 542 leaves the abutting hole 5201, which increases the contact area of the buffer sheet and the sliding block 520 when they are scratched or collided, so as to reduce the impact on the pressure maintaining rod 542.

[0067] In order to make the buffer pad 5422 in contact with the outer side of the sliding block 520, as shown in Figure 8As shown, in one embodiment, the second end surface of the rod body 5421 is provided with a matching inclined surface 542a, which is parallel to the extension direction of the oblique limiting guide groove 511, i.e., the matching inclined surface 542a is parallel to the sliding surface of the lower end of the sliding block 520, and the buffer pad 5422 is attached to the matching inclined surface 542a, so that the buffer pad 5422 is parallel to the extension direction of the oblique limiting guide groove 511, i.e., the buffer pad 5422 is parallel to the sliding surface of the lower end of the sliding block 520, and further, the outer side surface of the sliding block 520 is attached to the outer side surface of the buffer pad 5422 after the pressure maintaining rod 542 leaves the abutting hole 5201, i.e., the sliding surface of the lower end of the sliding block 520 is attached to the outer side surface of the buffer pad 5422 after the pressure maintaining rod 542 leaves the abutting hole 5201.

[0068] It can be understood that in order to realize the flanging operation, the impact of the upper flanging assembly 200 when closed is large. When the upper flanging assembly 200 pushes the sliding block 520 to slide, the sliding block 520 slides along the oblique limiting guide groove 511, so that the sliding block 520 rubs against the upper flanging assembly 200. Since the impact force of the upper flanging assembly 200 is large, the friction force between the stress surface 522 of the upper end of the sliding block 520 and the upper flanging assembly 200 is large, so that the stress surface 522 of the upper end of the sliding block 520 is more easily worn, which causes the bending angle of the second edge pushed by the sliding block 520 to decrease, and further causes the effect of the sliding block 520 to inhibit the bending to be poor.

[0069] In one embodiment, the rebound suppression mechanism 500 further comprises a planar rolling member installed on the stress surface 522 of the upper end of the sliding block 520. In this embodiment, when the upper flanging assembly 200 moves downward, the pushing surface 202 of the upper flanging assembly 200 abuts against the planar rolling member, so that the pushing surface 202 of the upper flanging assembly 200 abuts against the stress surface 522 of the sliding block 520 through the planar rolling member. When the sliding block 520 slides along the oblique limiting guide groove 511, the pushing surface 202 of the upper flanging assembly 200 is in rolling connection with the planar rolling member, which reduces the friction force received by the sliding block 520, suppresses the wear of the sliding block 520, and ensures the effect of the sliding block 520 to bend the second edge. In one embodiment, the planar rolling member is a planar bearing.

[0070] The present application also provides an automobile structural part forming device, which comprises the automobile structural part flanging die 10 of any of the above embodiments and a press machine. The upper die holder is installed on the power output end of the press machine, and the press machine is used to drive the upper die holder and the upper flanging assembly to move up and down, so as to realize the flanging operation.

[0071] As Figures 1 to 4As shown, in one of the embodiments, the automobile structural part flanging die 10 comprises an upper die seat 100, an upper flanging assembly 200, a lower die seat 300 and a lower flanging assembly 400, the upper flanging assembly 200 is fixedly connected to the upper die seat 100, the lower flanging assembly 400 is fixedly connected to the lower die seat 300, the upper flanging assembly 200 and the lower flanging assembly 400 are oppositely arranged and are used for flanging the steel plate together, the upper flanging assembly 200 is provided with an avoidance gap 201 at one end adjacent to the lower flanging assembly 400, and the automobile structural part flanging die 10 further comprises a springback suppression mechanism 500, a movable end of the springback suppression mechanism 500 is movably arranged in the avoidance gap 201, and the movable end of the springback suppression mechanism 500 is used for pushing the inner bending of the edge of the flanged steel plate when the upper flanging assembly 200 and the lower flanging assembly 400 are closed. In this embodiment, the upper flanging assembly 200 and the lower flanging assembly 400 are oppositely arranged, and the upper flanging assembly 200 moves up and down to realize the closing and opening of the die.

[0072] As shown in Figure 3 and Figure 4 Further, as shown, during flanging, first, the steel plate is placed on the lower flanging assembly 400, then the upper flanging assembly 200 moves downward to make the upper flanging assembly 200 bend the edge of the steel plate downward, then as the upper flanging assembly 200 continues to move downward, the edge of the steel plate corresponding to the avoidance gap 201 will be located between the lower flanging assembly 400 and the springback suppression mechanism 500, at this time, the springback suppression mechanism 500 pushes the edge of the steel plate corresponding to the avoidance gap 201 to bend inward, then as the upper flanging assembly 200 continues to move downward, the upper flanging assembly 200 and the lower flanging assembly 400 will be closed, at this time, the bending angle of the edge of the steel plate pushed by the springback suppression mechanism 500 is greater than the bending angle of the edge of the steel plate not pushed by the springback suppression mechanism 500, that is, the bending angle of the edge of the steel plate not pushed by the springback suppression mechanism 500 is 90 degrees, and the bending angle of the edge of the steel plate pushed by the springback suppression mechanism 500 is greater than 90 degrees, then the upper flanging assembly 200 moves upward and resets, at the same time, the springback suppression mechanism 500 separates from the edge of the steel plate and resets, then the edge of the steel plate corresponding to the avoidance gap 201 will spring back, so that the bending angle of the edge is 90 degrees, to form the automobile structural part.

[0073] It can be understood that the structure of the edge of the steel plate corresponding to the avoidance gap 201 after flanging is relatively complex, which leads to a large springback amount of the edge, therefore, in this embodiment, the springback suppression mechanism 500 only pushes the edge of the steel plate corresponding to the avoidance gap 201 to increase the bending angle of the edge with a relatively complex structure, and further suppresses the adverse effects of springback on the precision of the automobile structural part.

[0074] It should be noted that the strength of the steel plate of the present application is relatively high, which refers to the Q460 steel. The flanging angle of the automobile structural part of the present application is 90 degrees, that is, the final bending angle of all edges of the steel plate is 90 degrees.

[0075] The automobile structure forming device has the following advantages: the rebound suppression mechanism 500 pushes the edge of the steel plate corresponding to the position avoidance notch 201 to bend inward during flanging, that is, the rebound suppression mechanism 500 pushes the edge with complex structure in the steel plate to bend inward during flanging, so that the edge with complex structure in the steel plate is excessively bent after flanging, that is, the bending angle is greater than 90 degrees. After the rebound suppression mechanism 500 and the upper flanging assembly 200 are reset, the edge with complex structure in the steel plate rebounds, so that the flanging angle of the edge with complex structure in the steel plate is 90 degrees. In this way, even if the edge structure of the steel plate is complex, that is, the rebound amount of the edge of the steel plate is large, the automobile structure flanging die 10 can be used to form the automobile structure with a right-angle flanging angle, the forming efficiency of the automobile structure is improved, one set of shaping die is reduced, and the formed structure is relatively simple.

[0076] Compared with the prior art, the present application has at least the following advantages:

[0077] The automobile structure flanging die 10 has the following advantages: the rebound suppression mechanism 500 pushes the edge of the steel plate corresponding to the position avoidance notch 201 to bend inward during flanging, that is, the rebound suppression mechanism 500 pushes the edge with complex structure in the steel plate to bend inward during flanging, so that the edge with complex structure in the steel plate is excessively bent after flanging, that is, the bending angle is greater than 90 degrees. After the rebound suppression mechanism 500 and the upper flanging assembly 200 are reset, the edge with complex structure in the steel plate rebounds, so that the flanging angle of the edge with complex structure in the steel plate is 90 degrees. In this way, even if the edge structure of the steel plate is complex, that is, the rebound amount of the edge of the steel plate is large, the automobile structure flanging die 10 can be used to form the automobile structure with a right-angle flanging angle, the forming efficiency of the automobile structure is improved, one set of shaping die is reduced, and the formed structure is relatively simple.

[0078] The above-described embodiments only express several embodiments of the present application, and the description is relatively specific and detailed, but it cannot be understood as a limitation on the scope of the patent. It should be noted that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these are within the scope of the present application. Therefore, the scope of protection of the present application should be subject to the appended claims.

Claims

1. An automobile structure flanging die, comprising an upper die base, an upper flanging assembly, a lower die base and a lower flanging assembly, the upper flanging assembly being fixedly connected to the upper die base, the lower flanging assembly being fixedly connected to the lower die base, the upper flanging assembly and the lower flanging assembly being oppositely arranged and used for flanging a steel plate together, characterized in that: the upper flanging assembly is provided with an avoiding gap at one end adjacent to the lower flanging assembly, the automobile structure flanging die further comprises a rebound suppression mechanism, a movable end of the rebound suppression mechanism being movably arranged in the avoiding gap, the movable end of the rebound suppression mechanism being used for pushing the edge of the flanged steel plate inward when the upper flanging assembly and the lower flanging assembly are closed; the rebound suppression mechanism comprises: a guide block fixedly connected to the lower die base, the guide block being formed with a slanting limiting guide slot; a sliding block movably arranged in the avoiding gap, a part of the sliding block being slidably arranged in the slanting limiting guide slot, a sliding direction of the sliding block being inclined to a moving direction of the upper flanging assembly; and an elastic assembly installed on the lower die base, the elastic assembly further elastically abutting against the sliding block, the elastic assembly being used for pushing the sliding block to slide so as to separate the sliding block from the edge of the steel plate; a pressure maintaining assembly is installed on the lower die base, the guide block is formed with a pressure maintaining avoiding hole, a power output end of the pressure maintaining assembly is arranged through the pressure maintaining avoiding hole and is separably connected with the sliding block; wherein, a lower end surface of the upper flanging assembly is oppositely arranged with the sliding block, the upper flanging assembly pushes the sliding block to compress the elastic assembly and slide when closed, so that the sliding block pushes the edge of the flanged steel plate inward; wherein, the pressure maintaining assembly comprises a linear driving member and a pressure maintaining rod, the linear driving member is installed on the lower die base, a first end of the pressure maintaining rod is fixedly connected to a power output end of the linear driving member, the pressure maintaining rod is arranged through the pressure maintaining avoiding hole and is separably connected with the sliding block. The sliding block has a sliding part, the sliding part is slidably arranged in the slanting limiting guide slot. The sliding part is formed with a limiting gap, the guide block is formed with an avoiding hole, the rebound suppression mechanism further comprises a limiting member, the limiting member is arranged through the limiting gap and the avoiding hole, the limiting member is further threadedly connected to the lower die base. One end of the limiting member is completely accommodated in the avoiding gap. The slanting limiting guide slot is a dovetail groove, and the sliding part is a dovetail convex part.

2. The automotive structural part flanging die of claim 1, wherein The guide block is further formed with a slanting rectangular slide groove, the slanting rectangular slide groove is in communication with the slanting limiting guide slot, another part of the sliding block is slidably connected to a groove wall of the slanting rectangular slide groove.

3. The automotive structural part flanging die of claim 2, wherein, The elastic assembly is a spring pin.

4. The automotive structural part flanging die of claim 3, wherein A pushing surface is arranged at a lower end of the upper flanging assembly, an upper end of the sliding block is provided with a stress surface, the pushing surface and the stress surface are in close contact when the upper flanging assembly pushes the sliding block.

5. The automotive structural part flanging die of claim 2, wherein, The automobile structure flanging die according to any one of claims 1 to 8 is provided.

6. The automotive structural part flanging die of claim 5, wherein, ​ 7. The automotive structural part flanging die of claim 1, wherein, ​ 8. The automotive structural part flanging die according to any one of claims 1 to 7, characterized by, ​ 9. An automobile structural member forming apparatus characterized by comprising: ​

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