Automobile part bending die
By designing a bending mold for automotive parts, using cylinder drive connecting rods and bending rods, combined with the auxiliary support of multi-section chains, the problems of obvious creases and reduced toughness in the bending position of square tubes are solved, achieving a flatter and tougher bending effect.
Patent Information
- Application Number
- CN202421829595.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-07-30
AI Technical Summary
When bending the square pipe of the door frame in the prior art, the crease at the bending position is obvious, the internal stress increases, and the overall toughness of the square pipe is reduced.
A bending mold for auto parts is designed, using a cylinder-driven connecting rod, which is bent through the connecting rod and is equipped with multiple chains in the square tube to provide auxiliary support for the square tube and avoid obvious creases in the bending position.
Through the use of this mold, there is no obvious crease in the bending position of the square tube during bending, which improves the bending flatness and toughness of the square tube to ensure that the square tube is subjected to uniform stress.
Smart Images
Figure CN222985479U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of bending die technology, and particularly to a bending die for automotive parts. Background Art
[0002] The car door frame is composed of a square tube and a sheet metal plate, and the two form an obtuse angle. Due to the installation requirements of the car door frame, the whole car door frame needs to be bent along the length direction. Generally, workers bend one end of the car door frame through tools.
[0003] Existing manufacturing enterprises often use the method of inserting a rod for providing bending force into the square tube to perform bending when manufacturing car door frame parts. This method will cause obvious creases at the bending position on the square tube during the construction process, and the internal stress at the bending position will increase, thereby reducing the overall toughness of the square tube. Utility Model Content
[0004] In order to avoid the problems that the creases at the bending position of the square tube are obvious during the bending process, smooth bending cannot be achieved, and the overall toughness of the square tube is reduced, this application provides a bending die for automotive parts.
[0005] The bending die for automotive parts provided by this application adopts the following technical solutions:
[0006] A bending die for automotive parts, which is used to process a square tube symmetrically and integrally connected with two wing plates on one side, includes a base, a cylinder installed on the base, a limiting block arranged on the base to limit the bending of the square tube, a first punching component for punching the two wing plates, and a second punching component for punching the middle part of the square tube. The end of the cylinder telescopic rod is installed with a U-shaped block. A fixed block with a chute opened along the length direction is arranged on the base. The U-shaped block is slidably connected in the chute. Connecting holes are respectively penetrated through the two vertical plates of the U-shaped block. Connecting rods are movably connected to the U-shaped block at the positions of the two connecting holes. One end of the connecting rod away from the U-shaped block is hinged with a bending rod movably penetrating through the square tube. One end of the bending rod away from the U-shaped block is hinged with a multi-link chain. The multi-link chain movably penetrates through the inside of the square tube. The multi-link chain includes several chain links, and several chain links are sequentially hinged together. A butting block for preventing the square tube from moving along the length direction is arranged on the base.
[0007] By adopting the above technical solution, during the process of bending the square tube by the bending rod, the multi-section chain connected to one end of the bending rod penetrates through the bending position of the square tube to provide auxiliary support for the square tube, so that obvious creases will not be generated at the bending position on the square tube, improving the bending flatness of the square tube, and also ensuring that the square tube can be evenly stressed during the bending process, so that its toughness is not damaged. The setting of the connecting rod hinged to the U-shaped block is to convert the linear motion of the U-shaped rod into the curvilinear motion of the connecting rod, so that the bending rod will not suddenly receive a bending force, resulting in damage to the square tube.
[0008] Optionally, the connecting hole is an oval hole, and the length direction of the connecting hole is perpendicular to the sliding direction of the U-shaped block.
[0009] By adopting the above technical solution, when the connecting rod receives the thrust of the U-shaped rod, part of the thrust can be converted into a movement in the vertical direction. During the process of providing buffering for the bending force received by the bending rod, the stress on the connecting rod will not be too large, avoiding the fracture of the connecting rod.
[0010] Optionally, the limiting block includes a bottom groove plate and a pressing plate that are detachably connected. The bottom groove plate is provided with an installation groove along the length direction, the square tube is movably placed in the installation groove, and the pressing plate is in close contact with the inner bending surface at the top of the square tube.
[0011] By adopting the above technical solution, the square tube can be limited to prevent it from being displaced during the bending process, resulting in bending failure or even danger. The installation groove mainly provides horizontal limitation for the square tube, while the pressing plate is to prevent the unbent end of the square tube from moving, resulting in the bending degree not reaching the established standard.
[0012] Optionally, the pressing plate includes a material pressing part and a bending part that are integrally connected. The material pressing part is in close contact with the side of the square tube away from the wing plate. The side of the bending part close to the square tube is a slope, the bottom of the slope coincides with the side of the pressing plate close to the U-shaped block, and the included angle between the slope and the side of the pressing plate away from the slope is equal to the bending angle of the square tube.
[0013] By adopting the above technical solution, the bending angle of the square tube can be limited to prevent the bending angle of the square tube from becoming too large when the stroke of the cylinder is too large, exceeding the bearing limit of the square tube and resulting in fracture. At the same time, the slope surface of the slope on the bending part being in close contact with the bent part of the square tube also enables the cylinder to fully bend the square tube, preventing the shape of the square tube from elastically recovering.
[0014] Optionally, an auxiliary support structure for providing support to the square tube during the bending process is provided in the placement groove on the bottom groove plate. The auxiliary support structure includes a support block and an elastic fastener detachably installed at the bottom of the placement groove. The elastic fastener includes a buckle portion with a bent elasticity at one end. A buckle groove is formed in the bottom of the support block along the width direction. The buckle portion is buckled in the buckle groove, and the upper inclined surface of the buckle portion is always in close contact with one side of the square tube close to the wing plate.
[0015] By adopting the above technical solution, the force on the square tube during the bending process is more balanced, and at the same time, a supporting effect is provided for the bent part. And because the buckle portion has a bent elasticity, it will not affect the bending process of the square tube. The structure of the support block is set as a triangle because it can protect the support block from being damaged during the bending process of the square tube and improve the service life of the support block.
[0016] Optionally, the first punching assembly includes an arc-shaped seat with a top side dimensionally matched with the bending surface of the square tube, and two pressing blocks symmetrically and detachably connected to the arc-shaped seat. The two wing plates of the square tube are respectively clamped between the pressing blocks and the arc-shaped seat. A plurality of alignment holes are symmetrically and penetratingly formed in the arc-shaped seat. A first positioning block is arranged in each of the plurality of alignment holes. A plurality of first punching holes are formed in the first positioning block along the length direction. A first punch is movably inserted into the punching hole.
[0017] By adopting the above technical solution, the arc-shaped seat can ensure that during the punching process of the square tube, its bending structure will not be affected by a biasing force to make its bending angle smaller. The main function of the pressing block is to cooperate with the arc-shaped seat to limit the square tube to avoid deviation of the punching position. The first positioning block is mainly to prevent the punching part from being blocked during the punching process and causing the punching axis to tilt.
[0018] Optionally, the second punching assembly includes a positioning frame arranged on the base. The positioning frame includes a positioning plate and a support leg for connecting the positioning plate and the base. A contact pin is threadedly penetrated through the positioning plate. A backing plate is installed on the base at a position below the positioning plate. The square tube is placed on the backing plate, and the end of the contact pin abuts against one side of the square tube close to the wing plate. A second positioning block is installed on the positioning plate. A second punching hole is penetratingly formed in the second positioning block, and a second punch is movably inserted into the second punching hole.
[0019] By adopting the above technical solution, the square tube is placed on the positioning plate, and then the square tube is tightened by the contact pin, realizing the operation of fixing the square tube through friction. The structure is simple and has good flexibility, and the square tube can be easily disassembled, and then the square tube is punched by the second punch.
[0020] Optionally, the second punching component further includes a movable block for auxiliary support of the square tube. The movable block is slidably disposed on the base, and a pin is inserted through the movable block. The end of the pin is inserted into the punching hole on the wing plate, and a spring with both ends abutting against the wing plate and the movable block respectively is sleeved on the pin.
[0021] By adopting the above technical solution, since only one end of the square tube is fixed by the base and the abutting pin, the square tube will have a lateral displacement during the punching process. Therefore, a pin sleeved with a spring is provided to limit the square tube, and at the same time, the movable block also provides support for the bent part on the square tube, improving the stability of the square tube during the processing.
[0022] In summary, the present application includes at least one of the following beneficial technical effects:
[0023] 1. In the present application, the connecting rod that can move in the vertical direction and the horizontal direction is driven by a cylinder, and then the bending rod is driven by the connecting rod to bend the square tube, which can avoid the square tube being damaged due to suddenly receiving too large a bending force;
[0024] 2. In the present application, a multi-joint chain with chain links inserted into the square tube and hinged to each other provides internal auxiliary support for the square tube during the bending process, making the structure of the bent position of the square tube smooth, without obvious creases, and at the same time improving the structural toughness of the finished product. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 is the overall structural schematic diagram of a bending die for automotive parts in the present application.
[0026] Figure 2 is Figure 1 the enlarged view of part A in
[0027] Figure 3 is the exploded view of the limit block and its connection structure of a bending die for automotive parts in the present application.
[0028] Figure 4 is the exploded view of the structure of the first punching component of a bending die for automotive parts in the present application.
[0029] Figure 5 is the exploded view of a partial structure of the second punching component of a bending die for automotive parts in the present application.
[0030] Figure 6 is the exploded view of the movable block and its connection structure in the second punching component of a bending die for automotive parts in the present application.
[0031] Description of reference numerals: 1, square pipe; 11, wing plate; 2, base; 21, cylinder; 22, fixing block; 221, sliding groove; 23, limiting block; 231, bottom groove plate; 2311, placement groove; 232, pressing plate; 2321, material pressing part; 2322, bending part; 23221, slope; 24, abutting block; 3, U-shaped block; 31, connecting hole; 4, connecting rod; 5, bending rod; 6, multi-joint chain; 61, chain link; 7, auxiliary support structure; 71, support block; 711, buckling groove; 72, elastic fastener; 721, buckling part; 8, first punching component; 81, arc-shaped seat; 811, alignment hole; 82, pressing block; 83, first positioning block; 831, first punching hole; 84, first punch; 9, second punching component; 91, positioning frame; 911, positioning plate; 912, support leg; 92, abutting pin; 93, backing plate; 94, second positioning block; 941, second punching hole; 95, second punch; 96, movable block; 961, waist-shaped groove; 97, plug pin; 98, spring; 99, adjusting short rod. Detailed implementation manners
[0032] The following will Figures 1-6 further elaborate on this application in detail.
[0033] The embodiment of this application discloses a bending die for automobile parts.
[0034] Referring to Figure 1 and Figure 2 A bending die for automobile parts is mainly used to process a square pipe 1 with two long strip-shaped wing plates 11 symmetrically arranged and integrally connected to one side along the length direction. It mainly includes a base 2, a cylinder 21 installed at one end of the base 2, and a fixing block 22 fixedly arranged on the base 2. Both the cylinder 21 and the fixing block 22 are arranged on the axis along the width direction at the upper end of the base 2. The end of the telescopic rod of the cylinder 21 is fixedly installed with a U-shaped block 3, and the U-shaped block 3 is slidably arranged in the fixing block 22 along the length direction of the base 2. Specifically, a sliding groove 221 is opened on the side of the fixing block 22 close to the base 2, and the two vertical plates of the U-shaped block 3 are slidably connected to the inside of the sliding groove 221 and make reciprocating motions in the sliding groove 221.
[0035] Referring to Figure 2 and Figure 3, Further, through holes 31 are respectively formed through the two vertical plates of the U-shaped block 3, and the two through holes 31 coincide with each other in the horizontal direction. A short shaft is inserted into the through hole 31, and both ends of the short shaft are respectively movably inserted into the two through holes 31. One end of a connecting rod 4 is rotatably sleeved in the middle of the short shaft, and the other end of the connecting rod 4 is hinged to a bending rod 5. The bending rod 5 extends into the square tube 1 for bending the square tube 1. A limiting block 23 is fixedly arranged on the base 2. During the bending process of the square tube 1, the square tube 1 is always inside the limiting block 23 and is fixed. At the same time, an abutting block 24 abuts against the end of the square tube 1 far away from the bending rod 5. The abutting block 24 is fixedly arranged on the base 2 to prevent the square tube 1 from moving along the length direction.
[0036] Since the U-shaped block 3 slides back and forth on the fixing plate, the position of the short shaft in the kidney-shaped groove 961 is uncertain. Therefore, the short shaft in the attached drawings of the embodiments of the present application is no longer shown, but those skilled in the art can infer the position of the short shaft from the positions of the U-shaped block 3 and the connecting rod 4.
[0037] Preferably, the through hole 31 is a kidney-shaped hole, and its extending direction is parallel to the vertical plane. When the air cylinder 21 drives the U-shaped block 3 to slide inside the fixed block 22, the connecting rod 4 will push the bending rod 5 under the drive of the U-shaped block 3. Since the bending rod 5 is hinged to the connecting rod 4, the bending rod 5 will bend the square tube 1.
[0038] During this process, since the connecting rod 4 always transmits a thrust to the bending rod 5, the bending rod 5 will squeeze the inner wall of the upper side of the end of the square tube 1, resulting in deformation at this position. Designing the through hole 31 as a kidney-shaped hole can enable the connecting rod 4 to slide to the upper end of the kidney-shaped hole when the bending rod 5 squeezes the square tube 1. At this time, the connecting rod 4 will generate a horizontal thrust on the bending rod 5, thus avoiding the bending rod 5 from squeezing the inner wall of the square tube 1.
[0039] Refer to Figure 3 , One end of the bending rod 5 is hinged with a multi-joint chain 6. The multi-joint chain 6 includes a plurality of chain links 61 hinged in sequence. When the bending rod 5 bends the square tube 1, the multi-joint chain 6 is inserted into the bending position inside the square tube 1 to provide auxiliary support for the square tube 1, making the bending process of the square tube 1 smoother. At the same time, since the respective chain links 61 of the multi-joint chain 6 are hinged, there will be no obvious creases at the bending position of the square tube 1 after it is bent, which can protect the structural toughness of the square tube 1.
[0040] Refer to Figure 3, the limiting block 23 specifically includes a bottom groove plate 231 and a pressing plate 232 that are detachably connected. The bottom groove plate 231 is provided with a placement groove 2311 running through in the length direction. The square tube 1 is placed in the placement groove 2311 and its two sides are in contact with the inner walls of the placement groove 2311. The pressing plate 232 is installed at the upper end of the square tube 1 inside the bottom groove plate 231, and the side close to the bottom groove plate 231 is in close contact with one end of the upper side of the square tube 1, which is used to limit the square tube 1.
[0041] Referring to Figure 3 , further, the pressing plate 232 specifically includes a material pressing part 2321 and a bending part 2322 that are integrally connected. The material pressing part 2321 is in close contact with the side of the square tube 1 away from the wing plate 11 to limit the square tube 1 and prevent the square tube 1 from moving in the vertical direction during the process of being bent again. The bending part 2322 is close to the bending rod 5, and the side close to the square tube 1 is a slope 23221 structure at an angle with the material pressing part 2321. The bottom of the slope 23221 coincides with the side of the pressing plate 232 close to the U-shaped block 3, and the inclination angle of the slope 23221 is equal to the bending angle of the square tube 1, so that the square tube 1 will not have a situation where the bending angle is too large during the bending process.
[0042] Referring to Figure 3 , furthermore, an auxiliary support structure 7 for supporting the square tube 1 is provided in the placement groove 2311 of the bottom groove plate 231, so that the square tube 1 can be deformed smoothly when being bent, and the bending force of the bending rod 5 when bending the square tube 1 can be reduced. The auxiliary support structure 7 specifically includes a support block 71 and an elastic fastener 72 fixedly installed at the bottom of the placement groove 2311. The side of the support block 71 away from the square tube 1 is movably sleeved on the bottom groove plate 231, and a buckle groove 711 is opened at its bottom. The elastic fastener 72 includes a buckle part 721 that is movably matched with the buckle groove 711, and the opening has bending elasticity.
[0043] When one end of the square tube 1 is bent, the support block 71 pops up under the action of the buckle part 721, and the upper end of the support block 71 is always in contact with the bottom end of the part of the square tube 1 separated by the bending part 2322. At this time, the support block 71 and the bending part 2322 on the pressing plate 232 act together to form a clamping effect on the square tube 1, thereby protecting the structure of the square tube 1 from being damaged when it is bent and improving the qualification rate of the finished product.
[0044] Referring to Figure 1 and Figure 4, The embodiment of the present application further includes a first punching assembly 8 for punching two symmetrically integrally connected wing plates 11 on the square tube 1. It includes an arc-shaped seat 81 whose top side is completely fitted and matched with the arc-shaped surface on the side of the square tube 1 away from the wing plate 11, and two pressing blocks 82 symmetrically and detachably connected to the arc-shaped seat 81. The two wing plates 11 of the square tube 1 are respectively clamped between the pressing block 82 and the arc-shaped seat 81 to completely limit the square tube 1. A number of alignment holes 811 are symmetrically and penetratingly provided on the arc-shaped seat 81, and a first positioning block 83 for installing a punching member is provided at the upper end of the arc-shaped seat 81 at the positions of the alignment holes 811. A number of first punching holes 831 are vertically provided on the first positioning block 83, and a first punch 84 for punching the wing plate 11 is movably inserted into the first punching hole 831.
[0045] It should be noted that the positions of the alignment holes 811 and the first positioning block 83 shown in the accompanying drawings of the embodiment of the present application are only one structure that can implement the technical solution of the present application, and do not limit the content of the present application. The positions of the alignment holes 811 and the first positioning block 83 can be determined according to the processing requirements during actual processing.
[0046] Refer to Figure 5 , The embodiment of the present application further includes a second punching assembly 9 for punching the square tube 1. It includes a positioning frame 91 fixedly installed on the base 2. The positioning frame 91 includes a positioning plate 911 parallel to and spaced from the base 2 and a number of support legs 912 for supporting the positioning plate 911. A number of abutting pins 92 are threadedly inserted into the positioning plate 911, and the bottom end of the abutting pin 92 abuts against the side of the square tube 1 close to the wing plate 11 to fix the square tube 1.
[0047] At the same time, a backing plate 93 is installed on the side of the square tube 1 away from the abutting pin 92, and the square tube 1 is placed on the backing plate 93. A second positioning block 94 is also provided on the positioning plate 911, and a second punching hole 941 is penetratingly provided in the second positioning block 94, and a second punch 95 is slidably inserted into the second punching hole 941 to punch the middle part of the square tube 1 along the axis.
[0048] Refer to Figure 6 , Further, since the backing plate 93 is a flat plate structure and cannot provide support for the bent part 2322 of the square tube 1, it will cause the bent part 2322 of the square tube 1 to shake during the punching process, and then cause a slight deviation in the punching position. To solve this problem, the present application provides a movable block 96 slidably arranged on the base 2 to limit the bent part 2322 of the square tube 1. A plug pin 97 is slidably arranged in the movable block 96 along a direction perpendicular to the bent part 2322 of the square tube 1, and a spring 98 whose two ends are respectively abutted against the plug pin 97 and the inside of the movable block 96 is sleeved inside the plug pin 97. The plug pin 97 penetrates through the punching hole on the wing plate 11 to facilitate restricting the square tube 1 from shaking.
[0049] Optionally, a kidney-shaped groove 961 is formed on the side of the movable block 96, and an adjusting short rod 99 is slidably inserted into the kidney-shaped groove 961. The end of the adjusting short rod 99 extends into the movable block 96 and abuts against the spring 98 to adjust the elastic force of the spring 98.
[0050] The implementation principle of an automobile part bending die according to an embodiment of the present application is as follows:
[0051] The air cylinder 21 drives the U-shaped rod block to slide along the chute 221, so that the connecting rod 4 generates a thrust on the bending rod 5, and the bending rod 5 and the multi-section chain 6 are pushed into the square tube 1 located in the placement groove 2311. Then, the bending rod 5 is hinged to the connecting rod 4, which causes the bending rod 5 to move upward, thereby performing a bending operation on the square tube 1.
[0052] After that, since the bending rod 5 abuts against the inner wall of the square tube 1, the bending rod 5 is blocked, and then the connecting rod 4 slides to the top of the kidney-shaped groove along the vertical direction in the kidney-shaped groove to fully bend the square tube 1 and avoid damaging the inner wall of the square tube 1.
[0053] Then, the bent square tube 1 is clamped by the arc-shaped seat 81 and the pressing block 82 on the first punching assembly 8, and the first punch 84 punches holes in the wing plate 11. Finally, the square tube 1 is placed on the backing plate 93. The backing plate 93 and the abutting pin 92 jointly perform extrusion and limit on the square tube 1. Then, the bent portion 2322 of the square tube 1 is positioned by the plug pin 97 to prevent the square tube 1 from shaking during the punching process. The second punch 95 punches the middle of the square tube 1 for the last time.
[0054] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.
Claims
1. A bending die for automobile parts, used for processing a square tube (1) with two wing plates (11) connected symmetrically on one side, comprising a base (2), a cylinder (21) mounted on the base (2), a limit block (23) arranged on the base (2) for limiting the bending of the square tube (1), a first punching assembly (8) for punching holes in the two wing plates (11), and a second punching assembly (9) for punching holes in the middle of the square tube (1), characterized in that: A U-shaped block (3) is installed at the end of the telescopic rod of the cylinder (21); a fixed block (22) with a slide groove (221) is provided on the base (2) along the length direction; the U-shaped block (3) is slidably connected in the slide groove (221); connecting holes (31) are penetrated on the two vertical plates of the U-shaped block (3); the U-shaped block (3) is movably connected to a connecting rod (4) at the position of the two connecting holes (31); the connecting rod (4) is away from the U-shaped block ( 3) one end of the square tube (1) is hinged with a bending rod (5) which is movably arranged in the square tube (1); the end of the bending rod (5) which is away from the U-shaped block (3) is hinged with a multi-section chain (6); the multi-section chain (6) is movably arranged in the square tube (1); the multi-section chain (6) includes a plurality of chain links (61); the plurality of chain links (61) are hinged together in sequence; and an abutment block (24) is provided on the base (2) for preventing the square tube (1) from moving in the length direction.
2. The automobile parts bending mold according to claim 1, characterized in that: The connection hole (31) is a waist-shaped hole, and the length direction of the connection hole (31) is perpendicular to the sliding direction of the U-shaped block (3).
3. The automobile parts bending mold according to claim 1, characterized in that: The limit block (23) comprises a detachably connected bottom groove plate (231) and a pressure plate (232); the bottom groove plate (231) is provided with a placement groove (2311) extending through the bottom groove plate (231) along the length direction; the square tube (1) is movably placed in the placement groove (2311); and the pressure plate (232) is in close contact with the inner bending surface of the top end of the square tube (1).
4. The automobile parts bending mold according to claim 3, characterized in that: The pressing plate (232) comprises a pressing portion (2321) and a bending portion (2322) which are integrally connected, the pressing portion (2321) being in close contact with a side of the square tube (1) away from the wing plate (11), the side of the bending portion (2322) close to the square tube (1) being a slope (23221), the bottom of the slope (23221) being coincident with a side of the pressing plate (232) close to the U-shaped block (3), and the angle between the slope (23221) and a side of the pressing plate (232) away from the slope (23221) being equal to the bending angle of the square tube (1).
5. The automobile parts bending mold according to claim 3, characterized in that: An auxiliary support structure (7) for providing support to the square tube (1) during the bending process is arranged in the placement groove (2311) on the bottom groove plate (231), the auxiliary support structure (7) comprising a support block (71) and an elastic fastener (72) detachably mounted on the bottom of the placement groove (2311), the elastic fastener (72) comprising a buckle portion (721) having bending elasticity at one end, a buckle groove (711) is provided at the bottom of the support block (71) along the width direction, the buckle portion (721) is buckled in the buckle groove (711), and the upper end inclined surface of the buckle portion (721) is always in close contact with the side of the square tube (1) close to the wing plate (11).
6. The automobile parts bending mold according to claim 1, characterized in that: The first punching assembly (8) comprises an arc seat (81) whose top side matches the size of the bending surface of the square tube (1), and two pressing blocks (82) symmetrically and detachably connected to the arc seat (81); the two wing plates (11) of the square tube (1) are respectively clamped between the pressing blocks (82) and the arc seat (81); the arc seat (81) is symmetrically provided with a plurality of positioning holes (811); a first positioning block (83) is provided in each of the plurality of positioning holes (811); a plurality of first punching holes (831) are provided in the first positioning block (83) along the length direction; a first punch (84) is movably inserted into the punching holes.
7. The automobile parts bending mold according to claim 1, characterized in that: The second punching assembly (9) comprises a positioning frame (91) arranged on the base (2), the positioning frame (91) comprises a positioning plate (911) and a supporting leg (912) for connecting the positioning plate (911) and the base (2), a contact pin (92) is threadedly penetrated on the positioning plate (911), a pad (93) is installed on the base (2) below the positioning plate (911), the square tube (1) is placed on the pad (93), and the end of the contact pin (92) is in contact with a side of the square tube (1) close to the wing plate (11), a second positioning block (94) is installed on the positioning plate (911), a second punching hole (941) is penetrated through the second positioning block (94), and a second punch (95) is movably penetrated in the second punching hole (941).
8. The automobile parts bending mold according to claim 7, characterized in that: The second punching assembly (9) further comprises a movable block (96) for auxiliary support of the square tube (1); the movable block (96) is slidably arranged on the base (2); a latch (97) is inserted into the movable block (96); an end of the latch (97) is inserted into a punching hole on the wing plate (11); and a spring (98) is sleeved on the latch (97) with two ends respectively abutting against the wing plate (11) and the movable block (96).