Special trimming and punching integrated die for automobile plate spring

Abstract

The utility model discloses an automobile plate spring trimming and punching integrated special die which comprises an upper die frame, a lower die frame and a positioning rod, a guide sleeve is fixedly arranged at the lower end of the rear portion of the upper die frame, a guide column is fixedly arranged at the upper end of the rear portion of the lower die frame, the guide column is located under the inner side of the guide sleeve, and the upper die frame is connected with the lower die frame in a sliding mode. A positioning rod is arranged at the upper end of the middle part of the rear end part of the lower mold frame; in general, the utility model has the advantages that the structure is simple, the processing precision is improved, the processing cost is reduced, the production efficiency is improved, and the production cycle is shortened.

Description

Technical Field

[0001] The utility model belongs to the technical field of leaf spring manufacturing, and particularly relates to a special die for integrally trimming and punching an automotive leaf spring. Background Art

[0002] The leaf spring is the most critical shock-absorbing component in the automotive suspension system. Different automotive parts use leaf springs of different specifications, and leaf springs are paired and used on the same vehicle. Currently, in the production process of leaf springs, the rolling is generally divided into cold rolling and hot rolling. After the leaf spring plate is hot-rolled, a fixed die is used to trim the leaf spring plate. After trimming, it is necessary to wait for the leaf spring to cool before moving it to a punching press to complete the whole process. In the production process, the cooling after rolling takes a long time, wasting time and reducing the production efficiency of subsequent processes. Therefore, it is of great application significance to develop a special die for integrally trimming and punching an automotive leaf spring with simple structure, improved processing accuracy, reduced processing cost, increased production efficiency, and shortened production cycle. Summary of the Invention

[0003] The purpose of the utility model is to provide a special die for integrally trimming and punching an automotive leaf spring to solve the problems of too long production cycle and too high cost in the production of existing automotive leaf springs, so as to provide a special die for integrally trimming and punching an automotive leaf spring with simple structure, improved processing accuracy, reduced processing cost, increased production efficiency, and shortened production cycle, which has important application significance.

[0004] To achieve the above purpose, the technical solution provided by the utility model is:

[0005] A special die for integrally trimming and punching an automotive leaf spring, including an upper die holder, a lower die holder and a positioning rod. A guide sleeve is fixedly arranged at the lower end of the rear part of the upper die holder, and a guide post is fixedly arranged at the upper end of the rear part of the lower die holder. The guide post is located directly below the inner side of the guide sleeve, and the upper die holder and the lower die holder are slidably connected. A positioning rod is arranged at the upper middle part of the rear end of the lower die holder;

[0006] An upper template is arranged at the top of the upper die holder. An upper tool holder is fixedly arranged at the lower end of the upper template. An upper cutting knife is arranged inside the upper tool holder. A punch upper die seat is arranged on the right side of the upper tool holder. A punch locking screw is fixedly arranged at the bottom of the punch upper die seat, and a punch is arranged at the bottom of the punch locking screw;

[0007] A lower bottom plate is arranged at the bottom of the lower die holder. A lower tool holder is arranged at the rear side of the guide post at the upper end of the lower bottom plate. A lower cutting knife is arranged at the upper end of the lower tool holder. A punching bottom die seat is arranged on the right side of the lower tool holder, and a punching stripper plate is arranged at the upper end of the punching bottom die seat.

[0008] Further, the inner side of the upper cutting knife has a rounded-corner cross-section, the outer cross-section of the front side wall of the lower cutting knife is a rounded-corner cross-section, and the rounded-corner cross-section on the inner side of the upper cutting knife is tangential to the rounded-corner cross-section on the outer side of the front side wall of the lower cutting knife in structure.

[0009] Further, a positioning plate is arranged on the left side of the lower tool holder. The positioning plate has an I-shaped structure and the right side wall of the positioning plate is closely attached to the left side wall of the lower tool holder.

[0010] Further, a sliding groove is formed on the positioning rod. The clamping block arranged at the bottom of the positioning slider is located in the sliding groove and is slidably connected with the positioning rod. The bottom of the clamping block is fixedly connected with the positioning rod through a fixing bolt. A positioning pin is arranged at the upper end of the middle part of the positioning slider.

[0011] Further, a boss is arranged on the inner side of the punching and blanking plate. The inner side wall of the boss has an arc surface structure and is tangential to the arc surface at the top of the leaf spring in structure.

[0012] Beneficial effects: 1. Design a trimming device, including an upper die holder, a lower die holder, an upper cutting knife, and a lower cutting knife. When in use, the upper cutting knife and the lower cutting knife cooperate with each other to complete the trimming of the leaf spring after hot rolling.

[0013] 2. By arranging a punch upper die seat at the right side of the bottom of the upper die holder, a punch locking screw is arranged at the bottom of the punch upper die seat, a punch is arranged at the bottom of the punch locking screw, and the punch locking screw and the punch are in threaded connection. An appropriate punch can be selected and fixed according to the punching size of the leaf spring. A punching bottom die seat is arranged directly below the punch upper die seat on the right side of the lower die holder. A punching and blanking plate is fixedly arranged above the punching bottom die seat. A boss is arranged at the bottom of the punching and blanking plate. After the leaf spring is rolled and trimmed, it is moved above the punching bottom die seat and below the punching and blanking plate, and the arc surface at the top of the leaf spring closely adheres to the arc surface of the inner side wall of the boss for leaf spring positioning. After positioning, punching processing is carried out. The hot-rolled leaf spring is processed by a set of molds, saving the air cooling time of the leaf spring and improving the processing efficiency. At the same time, trimming and punching of the leaf spring are completed by the same mold, saving costs.

[0014] 3. By fixedly arranging a positioning rod at the upper end of the middle part of the rear end of the lower die holder, a positioning slider is arranged at the upper end of the positioning rod, and a positioning pin is arranged at the upper end of the middle part of the positioning slider. The positioning slider can slide back and forth above the positioning rod. The positioning slider can move back and forth according to the trimming position and the positioning hole position of the leaf spring and is then fixed to the positioning rod through the bottom bolt. During the trimming process of the leaf spring, the positioning hole can be sleeved outside the positioning pin and the leaf spring is placed above the positioning slider to complete the trimming process of the leaf spring, improving the processing accuracy and saving the processing time.

[0015] 4. By setting a positioning plate on the left side of the lower tool rest, with the right side wall of the vertical plate of the positioning plate closely attached to the left side wall of the lower tool rest, and the positioning plate having an I-shaped structure. During the positioning process of the leaf spring cutting edge, the positioning hole opened in the leaf spring is sleeved outside the positioning pin, and at the same time, the left side wall of the leaf spring closely adheres to the right side wall of the cross plate arranged at the top of the positioning plate to complete the positioning of the leaf spring. It can achieve rapid positioning, improve the processing accuracy, and save processing time. Generally speaking, the utility model has the advantages of simple structure, improved processing accuracy, reduced processing cost, increased production efficiency, and shortened production cycle. Brief Description of the Drawings

[0016] Figure 1 is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 is a three-dimensional structural schematic diagram of the upper die holder of the utility model;

[0018] Figure 3 is a three-dimensional structural schematic diagram of the lower die holder of the utility model;

[0019] Figure 4 is a three-dimensional structural schematic diagram of the punching and blanking plate of the utility model.

[0020] Reference Numerals: 0, die body; 1, upper die holder; 10, upper template; 11, guide bushing; 12, upper tool rest; 13, upper cutting tool; 14, upper die holder of punch head; 15, punch head locking screw; 2, lower die holder; 20, lower bottom plate; 21, guide post; 22, lower tool rest; 23, lower cutting tool; 24, positioning plate; 25, punching bottom die holder; 26, punching and blanking plate; 260, boss; 3, positioning rod; 30, sliding groove; 4, positioning slider; 40, clamping block; 5, positioning pin. Detailed Description of the Preferred Embodiment

[0021] The following further describes the embodiments of the utility model with reference to the drawings.

[0022] The specific embodiments of the utility model are as Figure 1 , Figure 2 , Figure 3 shown. The utility model provides a special integrated die for cutting and punching automotive leaf springs, including an upper die holder 1, a lower die holder 2, and a positioning rod 3. A guide bushing 11 is fixedly arranged at the lower end of the rear part of the upper die holder 1, and a guide post 21 is fixedly arranged at the upper end of the rear part of the lower die holder 2. The guide post 21 is directly below the inner side of the guide bushing 11, and the upper die holder 1 and the lower die holder 2 are slidably connected. A positioning rod 3 is arranged at the middle upper end of the rear end of the lower die holder 2;

[0023] The top of the upper die set 1 is provided with an upper template 10. The lower end of the upper template 10 is fixedly provided with an upper tool holder 12. An upper cutting tool 13 is arranged inside the upper tool holder 12. A punch upper die base 14 is arranged on the right side of the upper tool holder 12. A punch locking screw 15 is fixedly arranged at the bottom of the punch upper die base 14. A punch is arranged at the bottom of the punch locking screw 15.

[0024] The bottom of the lower die set 2 is provided with a lower bottom plate 20. A lower tool holder 22 is arranged behind a guide post 21 at the upper end of the lower bottom plate 20. A lower cutting tool 23 is arranged at the upper end of the lower tool holder 22. A punching bottom die base 25 is arranged on the right side of the lower tool holder 22. A punching stripper plate 26 is arranged at the upper end of the punching bottom die base 25.

[0025] As Figure 2 、 Figure 3 shown, by arranging a punch upper die base 14 at the right bottom of the upper die set 1, a punch locking screw 15 is arranged at the bottom of the punch upper die base 14, and a punch is arranged at the bottom of the punch locking screw 15. The punch locking screw 15 and the punch are connected by threads. An appropriate punch can be selected and fixed according to the punching size of the leaf spring. A punching bottom die base 25 is arranged directly below the punch upper die base 14 on the right side of the lower die set 2. A punching stripper plate 26 is fixedly arranged above the punching bottom die base 25. The vertical plates arranged on both side walls of the punching stripper plate 26 are fixedly connected to the left and right side walls of the punching bottom die base 25 by bolts. There is a certain distance between the punching stripper plate 26 and the punching bottom die base 25. A boss 260 is arranged at the bottom of the punching stripper plate 26. After the leaf spring is rolled and trimmed, it is moved to the position above the punching bottom die base 25 and below the punching stripper plate 26, and the arc surface at the top of the leaf spring closely adheres to the arc surface of the inner side wall of the boss 260 to complete the positioning of the leaf spring. After the positioning is completed, punching processing is carried out.

[0026] As Figure 1 、As Figure 3 shown, by fixedly arranging a positioning rod 3 at the upper middle part of the rear end of the lower die set 2, a positioning slider 4 is arranged at the upper end of the positioning rod 3, and a positioning pin 5 is arranged at the upper middle part of the positioning slider 4. The positioning slider 4 can slide back and forth above the positioning rod 3. The positioning slider 4 can move back and forth according to the trimming position and the positioning hole position of the leaf spring and is then fixed to the positioning rod 3 by bolts at the bottom. During the trimming process of the leaf spring, the positioning hole can be sleeved outside the positioning pin 5 while the leaf spring is placed above the positioning slider 4 to complete the trimming process of the leaf spring.

[0027] As Figure 2 、 Figure 3As shown in the figure, the inner side of the upper cutting knife 13 has a rounded corner cross-section, and the outer cross-section of the front side wall of the lower cutting knife 23 is a rounded corner cross-section. The inner rounded corner cross-section of the upper cutting knife 13 is tangential to the outer rounded corner cross-section of the front side wall of the lower cutting knife 23 in structure; during the edge cutting process of the leaf spring, the upper cutting knife 13 and the lower cutting knife 23 cooperate. While the upper cutting knife 13 presses down, the rounded corner cross-section provided on the inner side of the upper cutting knife 13 closely adheres to the outer rounded corner cross-section provided on the lower cutting knife, and the bottom of the upper cutting knife 13 coincides with the bottom of the lower cutting knife 23 to complete the edge cutting of the leaf spring.

[0028] As Figure 1 shown in the figure, a positioning plate 24 is provided on the left side of the lower tool holder 22. The positioning plate 24 has an I-shaped structure and the right side wall of the positioning plate 24 closely adheres to the left side wall of the lower tool holder 22; by providing the positioning plate 24 on the left side of the lower tool holder 22, the right side wall of the vertical plate provided on the positioning plate 24 closely adheres to the left side wall of the lower tool holder 22. The positioning plate 24 has an I-shaped structure. During the setting process, the positioning plate 24 can be dimensionally designed according to the width, height, and positioning dimensions of the leaf spring. During the edge cutting positioning process of the leaf spring, the positioning hole provided on the leaf spring is sleeved outside the positioning pin 5, and at the same time, the left side wall of the leaf spring closely adheres to the right side wall of the horizontal plate provided at the top of the positioning plate 24 to complete the positioning of the leaf spring.

[0029] As Figure 1 shown in the figure, a sliding groove 30 is provided on the positioning rod 3. The block 40 provided at the bottom of the positioning slider 4 is located in the sliding groove 30 and is slidably connected to the positioning rod 3. The bottom of the block 40 is fixedly connected to the positioning rod 3 through a fixing bolt. A positioning pin 5 is provided at the upper end of the middle part of the positioning slider 4;

[0030] By fixedly providing the positioning rod 3 at the upper end of the middle part of the rear end of the lower die holder, the length of the positioning rod 3 can be set according to the length of the leaf spring. A positioning slider 4 is provided at the upper end of the positioning rod 3, and a positioning pin 5 is provided at the upper end of the middle part of the positioning slider 4. The positioning slider 4 can slide back and forth above the positioning rod 3. The positioning slider 4 can move back and forth according to the edge cutting position and the positioning hole position of the leaf spring and is then fixed to the positioning rod 3 through the bottom bolt. During the edge cutting process of the leaf spring, the positioning hole can be sleeved outside the positioning pin 5, and at the same time, the leaf spring is placed above the positioning slider 4 to complete.

[0031] As Figure 4 shown in the figure, a convex platform 260 is provided inside the punching and stripping plate 26. The inner side wall of the convex platform 260 has an arc surface structure and is tangential to the top arc surface of the leaf spring in structure; the inner side wall of the convex platform 260 coincides with the inner arc surface of the upper cutting knife 13 in structure and is tangential to the outer arc surface of the lower cutting knife 23. During the punching positioning process of the leaf spring, the top wall of the leaf spring closely adheres to the inner side wall of the convex platform 260 to complete the front and rear positioning of the leaf spring.

[0032] When the present utility model is in use: As Figure 1 , Figure 2 , Figure 3 , Figure 4As shown in the figure, first, the upper die holder 1 needs to be fixedly connected to the upper part of the punching machine, and the lower die holder 2 needs to be fixedly connected to the lower part of the punching machine. Select a suitable positioning rod 3 according to the length of the leaf spring, and at the same time move the positioning slider 4 to a suitable position above the positioning rod 3 according to the preset positioning hole position of the leaf spring. Then, insert a fixing bolt into the bottom of the positioning slider 4 and fixedly connect it to the positioning rod 3. Select a suitable positioning plate 24 according to the width of the leaf spring and fixedly connect it to the lower bottom plate 20. Then, place the rolled leaf spring above the positioning slider 4, and at the same time, sleeved the preset positioning hole of the leaf spring on the outside of the positioning pin 5. Secondly, press the right side wall of the horizontal plate provided on the positioning plate 24 against the left side wall of the leaf spring to complete the positioning of the leaf spring. Start the punching machine, and the punching machine drives the upper die holder 1 to press down. During the pressing down process of the upper die holder 1, the upper cutting knife 13 and the lower cutting knife 23 cooperate to complete the edge cutting of the leaf spring. Then, take out the leaf spring and place the leaf spring between the punching and blanking plate 26 and the punching bottom die base 25, and at the same time press the top of the leaf spring against the inner side wall of the boss 260 to complete the punching positioning of the leaf spring. Start the punching machine, and the punching machine drives the punch upper die holder 14 and the punch to press down and cooperate with the punching bottom die base 25 and the punching and blanking plate 26 to complete the punching process of the leaf spring. During the edge cutting and punching process of the leaf spring, there is no need to complete the process after the leaf spring is air-cooled, which saves time and improves efficiency. At the same time, the edge cutting and punching of the leaf spring are completed by the same die, which saves costs. Generally speaking, the utility model has the advantages of simple structure, improved processing accuracy, reduced processing cost, improved production efficiency, and shortened production cycle.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A special die for integrated trimming and punching of automotive leaf springs, comprising an upper die holder (1), a lower die holder (2) and a positioning rod (3), characterized in that: A guide bushing (11) is fixedly arranged at the lower end of the rear part of the upper die set (1). A guide pillar (21) is fixedly arranged at the upper end of the rear part of the lower die set (2). The guide pillar (21) is located directly below the inner side of the guide bushing (11), and the upper die set (1) is slidably connected with the lower die set (2). A positioning rod (3) is arranged at the upper middle part of the rear end of the lower die set (2); An upper template (10) is arranged at the top of the upper die set (1). An upper tool holder (12) is fixedly arranged at the lower end of the upper template (10). An upper cutting knife (13) is arranged inside the upper tool holder (12). A punch upper die base (14) is arranged on the right side of the upper tool holder (12). A punch locking screw (15) is fixedly arranged at the bottom of the punch upper die base (14). A punch is arranged at the bottom of the punch locking screw (15); A lower base plate (20) is arranged at the bottom of the lower die set (2). A lower tool holder (22) is arranged at the rear side of the guide pillar (21) at the upper end of the lower base plate (20). A lower cutting knife (23) is arranged at the upper end of the lower tool holder (22). A punching bottom die base (25) is arranged on the right side of the lower tool holder (22). A punching material-removing plate (26) is arranged at the upper end of the punching bottom die base (25).

2. The special die for integrated edge cutting and punching of automotive leaf springs according to claim 1, characterized in that, The inner side of the upper cutting knife (13) has a rounded-corner cross-section. The outer cross-section of the front side wall of the lower cutting knife (23) is a rounded-corner cross-section. The inner rounded-corner cross-section of the upper cutting knife (13) is tangential to the outer rounded-corner cross-section of the front side wall of the lower cutting knife (23) in structure.

3. The special die for integrated edge cutting and punching of automotive leaf springs according to claim 1, characterized in that, A positioning plate (24) is arranged on the left side of the lower tool holder (22). The positioning plate (24) has an I-shaped structure, and the right side wall of the positioning plate (24) is closely attached to the left side wall of the lower tool holder (22).

4. A special die for integrated trimming and punching of automotive leaf springs according to claim 1, characterized in that, A sliding groove (30) is formed in the positioning rod (3). A clamping block (40) arranged at the bottom of the positioning slider (4) is located in the sliding groove (30) and is slidably connected with the positioning rod (3). The bottom of the clamping block (40) is fixedly connected with the positioning rod (3) through a fixing bolt. A positioning pin (5) is arranged at the upper middle part of the positioning slider (4).

5. The special die for integrated edge cutting and punching of automotive leaf springs according to claim 1, characterized in that, A boss (260) is arranged inside the punching material-removing plate (26). The inner side wall of the boss (260) has an arc surface structure and is tangential to the arc surface at the top of the leaf spring in structure.

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