Punching and hole flanging structure for automobile parts

Abstract

The utility model discloses a punching and hole flanging structure for automobile parts. The punching and hole flanging structure comprises an upper die base, an upper die foot is fixed on the upper die base, an elastic pressing piece is arranged in the upper die foot, an outer guide sleeve and a concave die plate are fixed on the upper die base at the same time, a hole flanging concave die insert is arranged in the concave die plate, and a material ejecting block is arranged in the hole flanging concave die insert. A lower cushion plate is fixed on the lower die base, a lower fixing plate is arranged on the lower cushion plate, an inner guide column and a male die base are arranged on the lower fixing plate, a hole flanging male die is arranged on the male die base, and an ejector plate penetrates through the inner guide column and the hole flanging male die to be arranged above the lower fixing plate. The hole flanging male die is of a large-heap-degree die drawing gentle slope transition structure and is provided with the male die base, the hole flanging male die can be replaced on the premise that die stripping is not needed, the problems that in the prior art, positioning is difficult to replace, the replacement period is long, cost is high, operation is complex and the like are solved, hole flanging and inner chamfering are achieved at the same time, the risk of hole flanging cracking is reduced, and production efficiency is improved. Compared with a hole flanging structure of a conventional structure, the chamfering procedure before hole flanging can be reduced, and the die chamfering cost and the punching labor cost are reduced.

Description

Technical Field

[0001] This utility model relates to a stamping and flanging structure for automotive parts, belonging to the field of stamping die technology. Background Technology

[0002] With the rapid development of the automotive industry, the requirements for the versatility and stability of automotive parts are becoming increasingly stringent. At the same time, the replacement cycle of automotive parts is becoming shorter and the cost control is becoming more stringent. Therefore, the stamping die development process requires that the punch and die selected for stamping dies have superior performance such as quick changeability, stability and economy. In addition, cracking is not allowed after the flanged products are flanged.

[0003] Existing stamping die conventional positioning and flanging punch structures cannot meet the above requirements. Existing stamping flanging punch structures are basically cylindrical with chamfered corners (see reference). Figure 1 The replacement requires disassembling the entire lower mold, which is inefficient and needs improvement. Utility Model Content

[0004] The purpose of this utility model is to overcome the deficiencies of the existing technology and provide a stamping and flanging structure for automotive parts, which can ensure that the product does not crack after flanging and reduce the chamfering process before flanging.

[0005] To achieve the above-mentioned technical objectives and effects, this application provides the following technical solution:

[0006] A stamping and flanging structure for automotive parts includes an upper die fixture and a lower die fixture arranged opposite to each other. The upper die fixture is connected to an external stamping device to move toward or away from the lower die fixture to achieve stamping and flanging operations.

[0007] The upper mold fixture includes an upper mold base, a spring-loaded component, a concave template, a piercing concave insert, and an ejector block. The concave template is disposed on the side of the upper mold base facing the lower mold fixture. At least one piercing concave insert is disposed inside the concave template, which plays a positioning and supporting role in the mold. The ejector block is slidably disposed between the upper mold base and the piercing concave insert. The spring-loaded component is disposed on the side of the upper mold base away from the lower mold fixture, and the number of spring-loaded components corresponds to the number of piercing concave inserts. The spring-loaded component has a spring-loaded part connected to the ejector block to realize the sliding movement of the ejector block being pressed in and ejected.

[0008] The lower die fixture includes a lower die base, a punch base, a piercing punch, and an ejector plate. The punch bases are located on the side of the lower die base facing the upper die base, and their number corresponds to the number of piercing die inserts. The piercing punch has a large draft angle transition structure and is detachably located on the side of the punch base facing the upper die base. The ejector plate is jacking up and down on the lower die base. The punch base and the piercing punch pass through the ejector plate. When the ejector plate is at its highest point, the piercing punch is located inside the ejector plate. When the ejector plate descends, the piercing punch protrudes out of the ejector plate. A guide assembly is provided between the upper die base and the lower die base.

[0009] Preferably, the end of the piercing punch facing the upper die base has an inlet portion, the diameter of which is smaller than the diameter of the product to be pierced, and the inlet portion has a large taper draft angle, which transitions with the chamfer of the piercing punch.

[0010] Preferably, the upper mold base has an upper mold foot on the side opposite to the lower mold tooling, and the spring-loaded component is embedded in the upper mold foot.

[0011] Preferably, the upper mold base has a sliding hole for the ejector block to slide, and the swivel die insert has a swivel groove coaxially arranged and connected with the sliding hole. The inner diameter of the swivel groove is smaller than the inner diameter of the sliding hole. The ejector block is composed of a limiting part and an ejector part arranged coaxially. The outer diameter of the limiting part is equal to the inner diameter of the sliding hole, and the outer diameter of the ejector part is equal to the inner diameter of the swivel groove. The limiting part is located at the end of the ejector part away from the lower mold base.

[0012] Preferably, a lower pad is provided on the side of the lower mold base facing the upper mold base, and a lower fixing plate is provided on the side of the lower pad away from the lower mold base. The punch base passes through the lower fixing plate and is fixed to the lower pad by the lower fixing plate. The ejector plate is raised and lowered on the side of the lower fixing plate away from the lower mold base. Multiple ejector rods are provided on the side of the ejector plate facing the lower fixing plate. The multiple ejector rods pass through the lower fixing plate, the lower pad, and the lower mold base in sequence.

[0013] Furthermore, at least one inner guide post is fixedly connected to the middle of the lower fixing plate, the inner guide post passes through the top material plate, and the concave template is provided with a guide groove adapted to the inner guide post.

[0014] Preferably, the guiding assembly includes an outer guide post and an outer guide sleeve. Multiple outer guide posts and outer guide sleeves are provided correspondingly. The outer guide posts are provided on the side of the lower mold base facing the upper mold base, and the outer guide sleeves are provided on the side of the upper mold base facing the lower mold base. The outer guide posts pass through the outer guide sleeves and the upper mold base.

[0015] Preferably, the piercing punch is inserted into the punch seat and fixed by bolts.

[0016] Preferably, the spring is a nitrogen spring.

[0017] The stamping and flanging structure for automotive parts provided by this utility model has the following advantages:

[0018] This utility model discloses a stamping and flanging structure for automotive parts. It optimizes the conventional flanging punch base by adding a large taper draft angle transition. When the flanging punch is introduced into the product, it enables chamfering within the flanging hole of the stamped part, while simultaneously providing a gentle slope transition to the flanging radius (R), thus ensuring that the stamped part does not crack after flanging. Furthermore, the flanging punch is designed with a quick-change structure, allowing for rapid replacement without disassembling the die. This effectively solves the problems of existing flanging punches, such as difficulty in replacement, long replacement cycles, high costs, complex operation, and easy cracking of stamped parts during flanging. This utility model optimizes the flanging punch structure, enabling chamfering during the flanging process. For stamped parts prone to cracking during flanging, it reduces the need for pre-flanging chamfering and deburring processes, lowering process costs. Attached Figure Description

[0019] Figure 1 A schematic diagram of the existing stamping and piercing punch structure;

[0020] Figure 2 This is a structural diagram of the product to be perforated according to an embodiment of this utility model;

[0021] Figure 3 A side view of a stamping and flanging structure for automotive parts provided in this embodiment of the present invention;

[0022] Figure 4 A cross-sectional structural diagram of a stamping and flanging structure for automotive parts provided for an embodiment of this utility model;

[0023] Figure 5 A schematic cross-sectional view of a stamped and folded upper part for automotive parts, provided as an embodiment of this utility model;

[0024] Figure 6 A cross-sectional structural diagram of a stamping and flanging structure for automotive parts in the flanging working state, provided for an embodiment of this utility model;

[0025] Figure 7 A cross-sectional structural diagram of the ejector plate after the punching and punching structure for automotive parts is ejected in the punching and punching state, as provided in an embodiment of this utility model.

[0026] Figure 8 This is a schematic diagram of the structure of the piercing punch provided in an embodiment of the present utility model;

[0027] Figure 9 This is a schematic diagram of the assembled cross-sectional structure of the main component of this utility model, showing the connection relationship between the piercing punch and the punch holder.

[0028] In the picture:

[0029] 1-Upper mold fixture; 11-Upper mold base; 111-Sliding hole; 12-Spring pressing part; 13-Diamond plate; 14-Flipping die insert; 141-Flipping groove; 15-Ejector block; 151-Limiting part; 152-Ejector part; 2-Upper mold foot; 3-Lower mold fixture; 31-Lower mold base; 32-Punch base; 33-Flipping punch; 331-Introducing part; 34-Ejector plate; 4-Lower backing plate; 5-Lower fixing plate; 6-Ejector rod; 7-Inner guide post; 8-Guide assembly; 81-Outer guide post; 82-Outer guide sleeve. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0031] Reference Figures 2-7 A stamping and flanging structure for automotive parts includes an upper die fixture 1 and a lower die fixture 3 arranged opposite to each other. The product to be flanged is placed on the lower die fixture 3. The upper die fixture 1 is detachably connected to an external stamping device to move toward or away from the lower die fixture 3 to achieve the stamping and flanging operation. The connection between the upper die fixture 1 and the stamping device is prior art and will not be described in detail.

[0032] Reference Figure 4-7The upper mold fixture 1 includes an upper mold base 11, a spring-loaded component 12, a concave template 13, a flanging concave mold insert 14, and an ejector block 15. The concave template 13 is fixedly installed on the side of the upper mold base 11 facing the lower mold fixture 3 by welding or bolting. At least one flanging concave mold insert 14, which plays a positioning and supporting role in the mold, is embedded in the concave template 13. The ejector block 15 is slidably disposed between the upper mold base 11 and the flanging concave mold insert 14. The spring-loaded component 12 is installed on the side of the upper mold base 11 away from the lower mold fixture 3, and the number of spring-loaded components corresponds to the number of flanging concave mold inserts 14. The spring-loaded component 12 has a spring-loaded part connected to the ejector block 15 to realize the pressing and ejection of the ejector block 15. In this embodiment, two flanging die inserts 14 are preferably installed, which can simultaneously realize the stamping and flanging operations of two products, which is convenient and fast. The spring pressure component 12 adopts a nitrogen spring, which provides stable spring pressure by storing and releasing high-pressure nitrogen, and effectively balances the pressure inside the die through the spring pressure, ensuring the stability and accuracy of the flanging process. After stamping, the scrap is ejected immediately to prevent the scrap from getting stuck in the die, ensuring the normal operation of the die and extending its service life. At the same time, the nitrogen spring has a fast response and can complete compression and rebound in a short time, adapting to the production needs of high-speed continuous stamping, thereby improving production efficiency.

[0033] Furthermore, the upper mold base 11 is provided with a sliding hole 111 for the ejector block 15 to slide. The swivel die insert 14 has a swivel groove 141 that is coaxially arranged and connected with the sliding hole 111. The inner diameter of the swivel groove 141 is smaller than the inner diameter of the sliding hole 111, thus forming a stepped structure. The ejector block 15 is composed of a limiting part 151 and an ejector part 152 that are coaxially integrally formed. The outer diameter of the limiting part 151 is equal to the inner diameter of the sliding hole 111, and the outer diameter of the ejector part 152 is equal to the inner diameter of the swivel groove 141. The limiting part 151 is located at the end of the ejector part 152 that is away from the lower mold base 31. Thus, while the ejector block 15 is ejected, the sliding of the ejector block 15 can be limited by the stepped section formed between the swivel groove 141 and the sliding hole 111.

[0034] Furthermore, an upper mold foot 2 is welded and fixed on the side of the upper mold base 11 away from the lower mold tooling 3, and a spring-loaded component 12 is embedded in the upper mold foot 2.

[0035] Reference Figures 4-9The lower die fixture 3 includes a lower die base 31, a punch base 32, a piercing punch 33, and an ejector plate 34. The punch base 32 is fixedly installed on the side of the lower die base 31 facing the upper die base 11, and the number corresponds to the number of piercing die inserts 14. The piercing punch 33 has a large-scale draft slope transition structure and is detachably installed on the side of the punch base 32 facing the upper die base 11. Specifically, the piercing punch 33 is inserted into the punch base 32 and fixed by bolts to form a quick-release mechanism. The structure can be changed so that the piercing punch 33 can be quickly changed without disassembling the mold; the top plate 34 is lifted and installed on the lower mold base 31, the punch base 32 and the piercing punch 33 pass through the top plate 34. When the top plate 34 is at its highest position, the piercing punch 33 is located inside the top plate 34. When the top plate 34 is lowered, the piercing punch 33 protrudes out of the top plate 34 and can then extend into the piercing die insert 14 with the pressure drop of the upper mold base 11 to realize the piercing operation.

[0036] Furthermore, the end of the piercing punch 33 facing the upper die base 11 is integrally formed with an inlet portion 331. The diameter of the inlet portion 331 is smaller than the diameter of the product to be pierced. The inlet portion 331 is provided with a large taper draft angle. The draft angle on the inlet portion 331 transitions with the chamfer of the piercing punch 33. When the piercing punch 33 introduces the product, it can realize the chamfering function of the stamped part piercing, and at the same time, it transitions to the piercing R, thereby ensuring that the stamped part does not crack after piercing.

[0037] Furthermore, a lower backing plate 4 is welded or bolted to the side of the lower mold base 31 facing the upper mold base 11. A lower fixing plate 5 is welded or bolted to the side of the lower backing plate 4 away from the lower mold base 31. The punch base 32 passes through the lower fixing plate 5 and is fixed to the lower backing plate 4 by covering it with the lower fixing plate 5. The ejector plate 34 is raised and lowered on the side of the lower fixing plate 5 away from the lower mold base 31. Multiple ejector rods 6 are provided on the side of the ejector plate 34 facing the lower fixing plate 5. The multiple ejector rods 6 pass through the lower fixing plate 5, the lower backing plate 4 and the lower mold base 31 in sequence.

[0038] Furthermore, at least one inner guide post 7 is fixedly connected to the middle of the lower fixed plate 5. The inner guide post 7 passes through the top material plate 34. The concave template 13 is provided with a guide groove (not shown in the figure) that matches the inner guide post 7. The inner guide post 7 and the guide groove can play a preliminary guiding role in the stamping of the upper die tooling 1 and the lower die tooling 3.

[0039] Reference Figures 3-7 A guide assembly 8 is also installed between the upper die holder 11 and the lower die holder 31 to further ensure the stability and accuracy of the stamping of the upper die fixture 1 and the lower die fixture 3.

[0040] The guide assembly 8 includes an outer guide post 81 and an outer guide sleeve 82. Multiple outer guide posts 81 and outer guide sleeves 82 are correspondingly provided. The outer guide post 81 is welded and fixed to the side of the lower die base 31 facing the upper die base 11. The outer guide sleeve 82 is welded and fixed or bolted to the side of the upper die base 11 facing the lower die base 31. The outer guide post 81 passes through the outer guide sleeve 82 and the upper die base 11. Thus, the cooperation between the outer guide post 81 and the outer guide sleeve 82 further guides the stamping of the upper die fixture 1 and the lower die fixture 3.

[0041] The working principle of the stamping and flanging structure for automotive parts of this utility model is as follows:

[0042] In this embodiment, the piercing punch 33 and the punch holder 32 together form the punch part.

[0043] Reference Figure 5 When the mold opens, the ejector plate 34 is pushed away from the lower fixed plate 5 by the ejector force of the ejector rod 6, and the product to be turned is positioned on the ejector plate 34 by the turning punch 33, ready for turning. At the same time, the upper mold ejector block 15 is in the ejection position under the ejection action of the nitrogen spring of the spring pressure component 12.

[0044] Reference Figure 6 As the upper die moves downward, the outer guide post 81 is inserted into the outer guide sleeve 82, and the piercing punch 33 presses the punch to be pierced into the piercing die insert 14. The ejector block 15 moves upward under the pushing force of the piercing punch 33, and the upper die continues to press down until the die plate 13 and the ejector plate 34 are stuck together, completing the piercing action.

[0045] Reference Figure 7 After the hole is turned over, as the upper die moves upward, the ejector block 15 is ejected from the turned-over stamping part by the nitrogen spring of the spring-loaded component 12 and continues to move upward, and the outer guide post 81 disengages from the outer guide sleeve 82. After the upper and lower dies are completely separated, the ejector pushes out of the ejector plate 34 to complete the stripping action.

[0046] The above description is merely a preferred embodiment of this utility model and is not intended to limit this utility model in any form or substance. It should be noted that those skilled in the art can make various improvements and additions without departing from this utility model, and these improvements and additions should also be considered within the protection scope of this utility model. Any modifications, alterations, and equivalent changes made by those skilled in the art without departing from the spirit and scope of this utility model using the disclosed technical content are equivalent embodiments of this utility model. Furthermore, any modifications, alterations, and evolutions made to the above embodiments based on the essential technology of this utility model are still within the scope of the technical solution of this utility model.

Claims

1. A stamping and flanging structure for automotive parts, characterized in that, It includes an upper die fixture (1) and a lower die fixture (3) arranged opposite to each other. The upper die fixture (1) is connected to an external stamping device to move toward or away from the lower die fixture (3) to realize the stamping and turning operation. The upper mold fixture (1) includes an upper mold base (11), a spring-loaded component (12), a concave template (13), a piercing concave mold insert (14), and an ejector block (15). The concave template (13) is disposed on the side of the upper mold base (11) facing the lower mold fixture (3). At least one piercing concave mold insert (14) is disposed inside the concave template (13) to provide positioning and support in the mold. The ejector block (15) is slidably disposed between the upper mold base (11) and the piercing concave mold insert (14). The spring-loaded component (12) is disposed on the side of the upper mold base (11) away from the lower mold fixture (3) and its number corresponds to the number of piercing concave mold inserts (14). The spring-loaded component (12) has a spring-loaded part connected to the ejector block (15) to realize the sliding movement of the ejector block (15) being pressed in and ejected. The lower mold fixture (3) includes a lower mold base (11), a spring-loaded component (12), a spring-loaded component (13), a piercing concave mold insert (14), and an ejector block (15). 31) A punch base (32), a piercing punch (33), and an ejector plate (34). The punch base (32) is located on the side of the lower die base (31) facing the upper die base (11), and the number of punch bases corresponds to the number of piercing die inserts (14). The piercing punch (33) is a large-scale draft transition structure and is detachably located on the side of the punch base (32) facing the upper die base (11). The ejector plate (34) is raised and lowered on the lower die base (31). The punch base (32) and the piercing punch (33) pass through the ejector plate (34). When the ejector plate (34) is at its highest point, the piercing punch (33) is located inside the ejector plate (34). When the ejector plate (34) is lowered, the piercing punch (33) protrudes from the ejector plate (34). A guide assembly (8) is provided between the upper die base (11) and the lower die base (31).

2. The stamping and flanging structure for automotive parts as described in claim 1, characterized in that, The end of the piercing punch (33) facing the upper die base (11) has an inlet portion (331). The diameter of the inlet portion (331) is smaller than the diameter of the product to be pierced. The inlet portion (331) is provided with a large taper draft angle. The draft angle on the inlet portion (331) transitions with the chamfer of the piercing punch (33).

3. The stamping and flanging structure for automotive parts as described in claim 1, characterized in that, The upper mold base (11) is provided with an upper mold foot (2) on the side opposite to the lower mold tooling (3), and the spring-loaded component (12) is embedded in the upper mold foot (2).

4. The stamping and flanging structure for automotive parts as described in claim 1, characterized in that, The upper mold base (11) is provided with a sliding hole (111) for the ejector block (15) to slide. The swivel die insert (14) has a swivel groove (141) that is coaxially arranged and connected with the sliding hole (111). The inner diameter of the swivel groove (141) is smaller than the inner diameter of the sliding hole (111). The ejector block (15) is composed of a limiting part (151) and an ejector part (152) arranged coaxially. The outer diameter of the limiting part (151) is equal to the inner diameter of the sliding hole (111). The outer diameter of the ejector part (152) is equal to the inner diameter of the swivel groove (141). The limiting part (151) is located at the end of the ejector part (152) that is away from the lower mold base (31).

5. The stamping and flanging structure for automotive parts as described in claim 1, characterized in that, The lower mold base (31) is provided with a lower pad plate (4) on the side facing the upper mold base (11). The lower pad plate (4) is provided with a lower fixing plate (5) on the side away from the lower mold base (31). The punch base (32) passes through the lower fixing plate (5) and is fixed on the lower pad plate (4) by the lower fixing plate (5). The ejector plate (34) is raised and lowered on the side of the lower fixing plate (5) away from the lower mold base (31). The ejector plate (34) is provided with multiple ejector rods (6) on the side facing the lower fixing plate (5). The multiple ejector rods (6) pass through the lower fixing plate (5), the lower pad plate (4) and the lower mold base (31) in sequence.

6. The stamping and flanging structure for automotive parts as described in claim 5, characterized in that, At least one inner guide post (7) is fixedly connected to the middle of the lower fixing plate (5). The inner guide post (7) passes through the top material plate (34). The concave template (13) is provided with a guide groove that matches the inner guide post (7).

7. The stamping and flanging structure for automotive parts as described in claim 1, characterized in that, The guide assembly (8) includes an outer guide post (81) and an outer guide sleeve (82). Multiple outer guide posts (81) and outer guide sleeves (82) are provided correspondingly. The outer guide post (81) is provided on the side of the lower mold base (31) facing the upper mold base (11), and the outer guide sleeve (82) is provided on the side of the upper mold base (11) facing the lower mold base (31). The outer guide post (81) passes through the outer guide sleeve (82) and the upper mold base (11).

8. The stamping and flanging structure for automotive parts as described in claim 1, characterized in that, The piercing punch (33) is inserted into the punch seat (32) and fixed by bolts.

9. The stamping and flanging structure for automotive parts as described in claim 1, characterized in that, The spring-loaded component (12) is a nitrogen spring.

Images