A die for steel back pressure chamfer forming

Abstract

This utility model relates to the field of mold technology and discloses a mold for steel back-pressure chamfering, including an upper mold base. A tangential punch is installed in the middle of the inner wall of the upper mold base. A gear ring insert is fixedly connected to the right side of the middle of the inner wall of the upper mold base. A main punch is installed on the left side of the outer wall of the gear ring insert. A pre-cutting punch is fixedly connected to the left side of the bottom of the inner wall of the upper mold base. A stripper plate is fixedly connected to the left side of the bottom of the upper mold base. A lower mold base is installed at the bottom of the upper mold base. A concave template is fixedly connected to the top of the lower mold base. A chamfering insert is fixedly connected to the right side of the outer wall of the concave template. In this utility model, the tangential punch installed in the middle of the inner wall of the upper mold base can achieve the stamping effect. At the same time, the ejector fixed to the right side of the chamfering insert can be used as an ejector during mold forming, which satisfies the integrated forming chamfering of steel back-pressure chamfering and meets production requirements.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a mold for steel back pressure chamfering. Background Technology

[0002] In modern industrial manufacturing, steel back-pressure chamfering plays a crucial role in the production of numerous products, ranging from automotive parts and electronic device housings to building structural components. Its applications are extremely wide-ranging. This process utilizes specific molds to plastically deform steel under pressure, precisely shaping the required chamfered structure. This is key to improving product assembly accuracy, appearance quality, and mechanical properties. In the manufacturing of automotive engine cylinder heads, precise steel back-pressure chamfering ensures a tight seal, effectively preventing gas leakage and guaranteeing efficient and stable engine operation. In the production of aluminum alloy housings for electronic devices, smooth chamfers not only enhance the product's feel and aesthetics... It can also prevent users from being scratched during use. It can be said that the performance of steel back pressure chamfering forming mold directly determines the quality of the product and its market competitiveness. Although steel back pressure chamfering forming mold has been improved to some extent with the continuous advancement of technology, and some molds have begun to adopt multi-station design and automated control technology, there are still many shortcomings in practical applications. Although some multi-station molds have improved production efficiency to a certain extent, positioning errors are prone to occur during the switching of stations, resulting in a decrease in chamfering accuracy. Moreover, the application of automated control technology in molds is not yet mature, and often requires a lot of manual intervention and adjustment, making it impossible to truly achieve fully automated production.

[0003] Currently, steel back-pressure chamfering forming dies on the market mainly consist of core forming components and material adaptation modules. Looking back at the development history of steel back-pressure chamfering forming dies, early die designs were relatively simple, often employing single-process, single-angle forming methods. The die structures were also relatively rough. During processing, it relied primarily on manual operation using experienced workers, applying pressure through simple stamping equipment to initially form a chamfer in the steel within the die. This traditional process has many insurmountable defects, severely restricting the improvement of production efficiency and product quality. Furthermore, from a precision control perspective, the manufacturing precision of traditional dies is limited, making it difficult to meet the high precision requirements of modern industry for steel back-pressure chamfering. Precision requirements mean that key components of molds, such as punches and dies, are prone to dimensional deviations during processing, leading to large tolerances in chamfer angles. This can have serious consequences in the manufacturing of products with extremely high assembly precision requirements, such as aerospace components. It may cause parts to not fit tightly together, affecting the stability and reliability of the overall structure. Moreover, during long-term use, the mold is subject to repeated impact loads, and its surface is prone to wear, further aggravating dimensional deviations. For example, when a certain automotive parts manufacturer uses traditional molds for steel back-pressure chamfering, the scrap rate of the products is high, which greatly increases production costs. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a steel back pressure chamfering mold, which aims to improve the problem that traditional steel back pressure forming molds in the prior art are difficult to chamfer.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a steel back-pressure chamfering mold, comprising an upper mold base, a tangential punch installed in the middle of the inner wall of the upper mold base, a gear ring insert fixedly connected to the right side of the middle of the inner wall of the upper mold base, a main punch installed on the left side of the outer wall of the gear ring insert, a pre-cutting punch fixedly connected to the left side of the bottom of the inner wall of the upper mold base, a stripper plate fixedly connected to the left side of the bottom of the upper mold base, a lower mold base installed at the bottom of the upper mold base, a concave template fixedly connected to the top of the lower mold base, a chamfering insert fixedly connected to the right side of the outer wall of the concave template, guide pins fixedly connected to both the left and right sides of the middle of the inner wall of the concave template, a chamfering insert installed near the middle of the top of the inner wall of the concave template, an ejector fixedly connected to the right side of the outer wall of the chamfering insert, punch holes opened on both the left and right sides of the bottom of the ejector, and a concave mold insert fixedly connected to the right side of the punch holes.

[0006] As a further description of the above technical solution:

[0007] A connecting plate is fixedly connected to the inner wall of the upper mold base near the top, and a spring is fixedly connected to both the left and right sides of the inner wall of the connecting plate.

[0008] As a further description of the above technical solution:

[0009] The upper mold base has a support shaft fixedly connected to the front and rear sides of the top center, and a spring is installed on the outer wall of the support shaft.

[0010] As a further description of the above technical solution:

[0011] The top of the second spring is fixedly connected to a top cover, and holes are provided around the top of the top cover.

[0012] As a further description of the above technical solution:

[0013] The upper mold base has support shafts at the four corners of its top, and threaded pins are threaded to the front and rear sides of the inner wall of the upper mold base.

[0014] As a further description of the above technical solution:

[0015] Limiting shafts are fixedly connected to the left and right sides of the upper mold base near the edges, and connecting shafts are fixedly connected to the four corners of the top of the lower mold base.

[0016] As a further description of the above technical solution:

[0017] The top surface of the lower mold base is fixedly connected to the left and right sides near the center with a limiting shaft, and the front and rear sides of the upper mold base are both threadedly connected with threaded shafts.

[0018] As a further description of the above technical solution:

[0019] The front and rear sides of the top surface of the lower mold base are fixedly connected to a second support shaft, and the outer wall of the second support shaft is provided with a third spring.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, the tangential punch installed in the middle of the inner wall of the upper die base can achieve the stamping effect. At the same time, the main punch is fixed on the right side of the inner wall of the upper die base for the main stamping. The concave template fixed on the top of the lower die base is used for material forming. The guide pins fixed on both the left and right sides of the middle of the inner wall of the concave template are used to guide the die. At the same time, the chamfering insert is fixed on the inner wall of the guide pin near the right side for chamfering the die. The ejector fixed on the right side of the chamfering insert is used to eject the die during forming, which satisfies the integrated forming chamfering of the steel back pressure chamfering and meets the production requirements. Attached Figure Description

[0022] Figure 1 This is a perspective view of the front side of the upper mold base of a steel back-pressure chamfering mold proposed in this utility model;

[0023] Figure 2 This is a structural diagram of the top cover of a steel back-pressure chamfering mold proposed in this utility model;

[0024] Figure 3 This utility model provides a structural diagram of the connecting plate of a steel back-pressure chamfering mold.

[0025] Figure 4 This is a structural diagram of the limiting shaft of a mold for steel back-pressure chamfering proposed in this utility model;

[0026] Legend:

[0027] 1. Upper die base; 2. Tangential punch; 3. Gear ring insert; 4. Main punch; 5. Die insert; 6. Ejector; 7. Hole punch; 8. Chamfer insert; 9. Lower die base; 10. Guide pin; 11. Die plate; 12. Stripper plate; 13. Pre-cut punch; 14. Connecting plate; 15. Spring 1; 16. Threaded pin; 17. Support shaft 1; 18. Spring 2; 19. Top cover; 20. Support shaft 2; 21. Limiting shaft 1; 22. Connecting shaft; 23. Spring 3; 24. Limiting shaft 2; 25. Threaded shaft; 26. Hole. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see the appendix Figure 1 - Appendix Figure 3This utility model provides an embodiment of a steel back-pressure chamfering mold, comprising an upper mold base 1, a tangential punch 2 installed in the middle of the inner wall of the upper mold base 1, a gear ring insert 3 fixedly connected to the right side of the middle of the inner wall of the upper mold base 1, a main punch 4 installed on the left side of the outer wall of the gear ring insert 3, a pre-cutting punch 13 fixedly connected to the left side of the bottom of the inner wall of the upper mold base 1, a stripper plate 12 fixedly connected to the left side of the bottom of the upper mold base 1, a lower mold base 9 installed at the bottom of the upper mold base 1, a concave template 11 fixedly connected to the top of the lower mold base 9, a chamfering insert 8 fixedly connected to the right side of the outer wall of the concave template 11, guide pins 10 fixedly connected to both the left and right sides of the middle of the inner wall of the concave template 11, a chamfering insert 8 installed near the middle of the top of the inner wall of the concave template 11, and a lower mold base 9 stably installed at the bottom of the upper mold base 1, which provides a solid foundation for the entire mold. At the top of the lower mold base 9, a concave template 11 is firmly fixedly connected. The concave template 11 is one of the core components of the mold. On the right side of the outer wall of the concave template 11, a chamfer insert 8 is connected by a precise fixing method. The chamfer insert 8 is used to form the chamfer of the workpiece. An ejector 6 is fixedly connected to the right side of the outer wall of the chamfer insert 8. The bottom left and right sides of the ejector 6 are provided with punch holes 7. The right side of the punch holes 7 is fixedly connected to the concave mold insert 5.

[0030] Specifically, a tangential punch 2 is precisely installed at the center of the inner wall of the upper die holder 1. This tangential punch 2 is mainly used to realize the tangential punching function. In the right-side area of ​​the center of the inner wall of the upper die holder 1, a gear ring insert 3 is connected by a sturdy fixing method. This gear ring insert 3 is mainly used for support and positioning. A main punch 4 is installed on the left-side part of the outer wall of the gear ring insert 3. This main punch 4 plays a key role in the stamping process. In the bottom left-side position of the inner wall of the upper die holder 1, a pre-cutting punch 13 is firmly fixed. This pre-cutting punch 13 is used for the pre-cutting process to ensure the initial forming of the material. In the bottom left-side area of ​​the upper die holder 1, a stripper plate 12 is also reliably fixed. This stripper plate 12 is used to smoothly remove the material after stamping. In the top of the inner wall of the concave die 11, near the center, a chamfering insert 8 is also installed. In the right-side part of the outer wall of the chamfering insert 8, an ejector 6 is fixed by a sturdy connection method. This ejector 6 is used to eject the workpiece after stamping.

[0031] Please see the appendix Figure 2 - Appendix Figure 4A connecting plate 14 is fixedly connected to the inner wall of the upper mold base 1 near the top. Springs 15 are fixedly connected to the left and right sides of the inner wall of the connecting plate 14. Support shafts 17 are fixedly connected to the front and rear sides of the top surface of the upper mold base 1. Springs 18 are installed on the outer wall of the support shafts 17. A top cover 19 is fixedly connected to the top of the springs 18. Holes 26 are opened around the top of the top of the top cover 19. Support shafts 20 are opened at the four corners of the top of the upper mold base 1. Multiple holes 26 are evenly opened around the top of the top of the top cover 19 to facilitate ventilation or other functional requirements. In addition, support shafts 20 are opened at the four corners of the top of the upper mold base 1 to enhance the support and stability of the overall structure. Threaded nails 16 are threadedly connected to the front and rear sides of the inner wall of the upper mold base 1.

[0032] Specifically, a connecting plate 14 is fixedly connected to the inner wall of the upper mold base 1 near the top. Springs 15 are firmly fixedly connected to both the left and right sides of the inner wall of the connecting plate 14 to ensure the stability and elasticity of the structure. Support shafts 17 are fixedly connected to both the front and rear sides of the top center of the upper mold base 1. Springs 18 are installed on the outer wall of the support shafts 17. A top cover 19 is fixedly connected to the top of the springs 18. At the same time, threaded nails 16 are fixed to both the front and rear sides of the inner wall of the upper mold base 1 by threaded connection to ensure the tight connection and firmness between the components.

[0033] Please see the appendix Figure 1 - Appendix Figure 3 Limiting shaft 1 21 is fixedly connected to the left and right sides near the edge of the upper mold base 1. Connecting shaft 22 is fixedly connected to the four corners of the top of the lower mold base 9. Limiting shaft 24 is fixedly connected to the left and right sides near the middle of the top surface of the lower mold base 9. Threaded shaft 25 is threadedly connected to the front and rear sides of the upper mold base 1. Limiting shaft 24 is also reliably fixedly connected to the top surface of the lower mold base 9 on its left and right sides near the middle to ensure the positioning accuracy of the mold base. Threaded shaft 25 is installed on the front and rear sides of the upper mold base 1 through threaded connection. This connection method is convenient for adjustment and fixation. Supporting shaft 20 is fixedly connected to the front and rear sides of the top of the lower mold base 9. Spring 3 23 is provided on the outer wall of the supporting shaft 20.

[0034] Specifically, the upper mold base 1 is securely connected to limit shaft 21 on both its left and right sides near the edges to ensure its stability and accuracy during operation. The lower mold base 9 is securely connected to connecting shaft 22 at its four top corners. The top surface of the lower mold base 9 is securely connected to support shaft 20 on both its front and rear sides. Spring 3 23 is provided on the outer wall of support shaft 20 to provide necessary elastic support and ensure the stable operation and flexible adjustment of the entire mold base system.

[0035] Working principle: The tangential punch 2 installed in the middle of the inner wall of the upper die holder 1 can achieve the stamping effect. At the same time, the main punch 4 is fixed on the right side of the inner wall of the upper die holder 1 for the main stamping. The concave template 11 fixed on the top of the lower die holder 9 is used for material forming. The guide pins 10 fixed on both the left and right sides of the middle of the inner wall of the concave template 11 are used to guide the die. At the same time, the chamfering insert 8 is fixed on the inner wall of the guide pin 10 near the right side for chamfering the die. The ejector 6 fixed on the right side of the chamfering insert 8 is used to eject the die during forming, which meets the integrated forming chamfering of the steel back pressure chamfering and meets the production requirements.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A mold for steel back-pressing chamfering, comprising an upper mold base (1), characterized in that: A tangential punch (2) is installed in the middle of the inner wall of the upper die holder (1). A gear ring insert (3) is fixedly connected to the right side of the middle of the inner wall of the upper die holder (1). A main punch (4) is installed on the left side of the outer wall of the gear ring insert (3). A pre-cutting punch (13) is fixedly connected to the left side of the bottom of the inner wall of the upper die holder (1). A stripper plate (12) is fixedly connected to the left side of the bottom of the upper die holder (1). A lower die holder (9) is installed at the bottom of the upper die holder (1). A stripper plate (12) is fixedly connected to the top of the lower die holder (9). A concave template (11) is provided with a chamfer insert (8) fixedly connected to the right side of its outer wall. Guide pins (10) are fixedly connected to the left and right sides of the middle part of the inner wall of the concave template (11). A chamfer insert (8) is installed near the middle of the top of the inner wall of the concave template (11). An ejector (6) is fixedly connected to the right side of the outer wall of the chamfer insert (8). A punch (7) is provided on the left and right sides of the bottom of the ejector (6). A die insert (5) is fixedly connected to the right side of the punch (7).

2. The mold for steel back-pressure chamfering according to claim 1, characterized in that: A connecting plate (14) is fixedly connected to the inner wall of the upper mold base (1) near the top, and springs (15) are fixedly connected to the left and right sides of the inner wall of the connecting plate (14).

3. The mold for steel back-pressure chamfering according to claim 1, characterized in that: The upper mold base (1) has a support shaft (17) fixedly connected to the front and rear sides of the top center of the top surface, and a spring (18) is installed on the outer wall of the support shaft (17).

4. The mold for steel back-pressure chamfering according to claim 3, characterized in that: The top of the second spring (18) is fixedly connected to a top cover (19), and holes (26) are provided around the top of the top cover (19).

5. The mold for steel back-pressure chamfering according to claim 1, characterized in that: The upper mold base (1) has four support shafts (20) at the top corners, and the upper mold base (1) has threaded nails (16) threadedly connected to the front and rear sides of the inner wall.

6. The mold for steel back-pressure chamfering according to claim 1, characterized in that: Limiting shafts (21) are fixedly connected to the left and right sides of the upper mold base (1) near the edge, and connecting shafts (22) are fixedly connected to the four corners of the top of the lower mold base (9).

7. The mold for steel back-pressure chamfering according to claim 1, characterized in that: The lower mold base (9) has a limit shaft (24) fixedly connected to the left and right sides of the top surface near the middle, and the upper mold base (1) has a threaded shaft (25) threadedly connected to the front and rear sides.

8. The mold for steel back-pressure chamfering according to claim 1, characterized in that: The front and rear sides of the top face of the lower mold base (9) are fixedly connected to the second support shaft (20), and the outer wall of the second support shaft (20) is provided with the third spring (23).

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