High-end bicycle chain inner chain plate integrated forming die

Abstract

The utility model discloses an integral forming die for an inner chain plate of a high-end bicycle chain, and belongs to the technical field of chain manufacturing. A pre-punching station, a waist waste cutting station, a waist chamfering station, a middle hollow hole cutting station, a waist thinning station, a flange upward punching station, a downward flange forming station, a whole piece blanking station and a waste cutting station are sequentially arranged between the upper die and the lower die in the advancing direction of the strip steel. By improving the mold structure, the production efficiency can be improved, the quality of the inner chain plate is ensured, and the production cost is reduced; the inner chain plate can be formed through one die, and meanwhile the problems that when the inner chain plate is punched, the proportion of a flange tearing belt is large, and the flatness is poor can be obviously solved.

Description

Technical Field

[0001] This invention belongs to the field of chain manufacturing technology, specifically relating to an integrated molding mold for the inner chain plate of a high-end bicycle chain. Background Technology

[0002] A chain is a transmission device composed of metal links or rings, primarily used for mechanical transmission and traction. While consisting of rigid components, chains are part of a flexible system and are widely used in various basic mechanical components.

[0003] The inner link plate is a key component of the chain. High-end bicycle chains require inner link plates with high flatness, small height difference (height difference of the flange plane) at the flange (the flange formed by the punching and turning of the flange hole at the end of the chain plate) and small tear strip. Existing molds are mostly split molds, and the manufacturing process is divided into steps such as stamping blanking and flange forming. This is not only inefficient and increases labor and machine costs, but also results in unsatisfactory quality of the inner link plate. Utility Model Content

[0004] This invention discloses an integrated molding die for the inner chain plate of a high-end bicycle chain. By improving the die structure, the quality of the inner chain plate of the bicycle chain can be effectively improved, production efficiency can be increased, and production costs can be reduced.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A high-end bicycle chain inner chain plate integrated molding die includes an upper die and a lower die. Between the upper die and the lower die, along the direction of the strip steel travel, there are sequentially arranged a pre-punching station, a waist scrap cutting station, a waist chamfering station, a center hollowing hole cutting station, a waist thinning station, a flange upward punching station, a downward flange forming station, a whole piece blanking station, and a scrap cutting station.

[0007] Preferably, the upper mold includes an upper mold base, and the lower end of the upper mold base is provided with a first fixing plate, a second fixing plate, and a third fixing plate in sequence along the direction of strip travel. The lower ends of the first fixing plate, the second fixing plate, and the third fixing plate are respectively connected to a first guide plate, a second guide plate, and a third guide plate. The lower mold includes a lower mold base, and the top of the lower mold base is provided with a first concave template opposite to the first guide plate, a second concave template opposite to the second guide plate, and a third concave template opposite to the third guide plate.

[0008] Preferably, the pre-punching station includes a coarse punch, the upper end of which is connected to the first part of the fixing plate, and the lower end of which passes through the first part of the guide plate. A pre-punching die is provided on the first part of the die plate below the coarse punch to cooperate with the coarse punch.

[0009] Preferably, the waste cutting station includes a waste cutting punch, the upper end of which is connected to the first fixed plate and the lower end passes through the first guide plate. A waste cutting die is provided on the first concave template opposite to the waste cutting punch. A waste cutting guide insert is embedded in the first fixed plate, and the waste cutting punch passes through the waste cutting guide insert and is guided by it.

[0010] Preferably, the waist chamfering station includes a waist chamfering punch, the upper end of which is embedded in the first part of the fixing plate, and the lower end passes through the first part of the guide plate. A waist chamfering die is provided on the first part of the die plate opposite to the waist chamfering punch.

[0011] Preferably, the center-cutting hollow hole station includes a center-cutting hollow hole punch. The top end of the center-cutting hollow hole punch is connected to the first part of the fixing plate, and the lower end passes through the center-cutting hollow hole guide insert preset in the first part of the guide plate and is guided by it. The center-cutting hollow hole die is provided on the first part of the die plate below the center-cutting hollow hole punch.

[0012] Preferably, the waist thinning station includes a waist thinning punch, the upper end of which is connected to the first part of the fixing plate, and the lower end passes through the first part of the guide plate and protrudes from the lower end of the first part of the guide plate.

[0013] Preferably, the flange-upward punching station includes a flange-upward punching punch, the lower end of which is connected to the lower die base, and the upper end of which passes through the second part of the concave template. A compression spring is connected between the lower end of the second part of the concave template and the lower die base.

[0014] Preferably, the downward flange forming station includes a downward flange punch, the upper end of which is fixed to the upper mold base, and the lower end passes through the third part fixing plate and the third part guide plate in sequence. The third part concave template opposite to the downward flange punch is provided with a downward flange punch, the lower end of which is fixedly connected to the lower mold base, and the upper end passes through the downward flange punch guide insert embedded in the third part concave template.

[0015] Preferably, the blanking station includes a blanking punch, the upper end of which is connected to a third fixed plate and the lower end of which passes through a third guide plate. A blanking die is provided on a third concave template opposite to the blanking punch. The scrap cutting station includes a scrap cutting upper punch, the upper end of which is connected to a third fixed plate and the lower end of which passes through a third guide plate. A scrap cutting lower punch is provided on a third concave template opposite to the scrap cutting upper punch.

[0016] The beneficial effects of this new type of high-end bicycle chain inner chain plate integrated molding die are as follows:

[0017] This new invention improves production efficiency, ensures the quality of the inner chain plate, and reduces production costs through improvements to the mold structure. The inner chain plate can be formed with only one mold. At the same time, this invention can significantly improve the problems of large flange tear band ratio and poor chain plate flatness when punching the inner chain plate, and can reduce the height difference of the flange plane. Attached Figure Description

[0018] Figure 1 A schematic diagram of the overall cross-sectional structure of this novel invention;

[0019] Figure 2 The material layout diagram of this novel material.

[0020] 1. Pre-punching die; 2. Lower die base; 3. First part die plate; 4. Upper die base; 5. First part fixing plate; 6. First part guide plate; 7. Rough punch; 8. Waist-cutting die; 9. Waist-cutting punch; 10. Waist-cutting guide insert; 11. Waist chamfering punch; 12. Waist chamfering die; 13. Center-cutting hollow hole die; 14. Center-cutting hollow hole punch; 15. Center-cutting hollow hole guide insert; 16. Third part guide plate 17. Main plate; 18. Third part concave plate; 19. Waist thinning punch; 20. Flange upward punch; 21. Second part guide plate; 22. Second part fixing plate; 23. Second part spring; 24. Downward flange punch; 25. Whole piece blanking die; 26. Whole piece blanking punch; 27. Downward flange punch; 28. Scrap cutting lower punch; 29. ​​Scrap cutting upper punch; 30. Third part fixing plate; 31. Stripper plate. Detailed Implementation

[0021] The following description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0022] The following embodiments can be understood as a part of the local structure or method of the present invention, or as a combination of embodiments to explain the connotation of a larger range of structures or methods of the present invention.

[0023] Example 1

[0024] A high-end bicycle chain inner chain plate one-piece molding mold, such as Figure 1As shown, the device includes an upper die and a lower die. Between the upper die and the lower die, along the direction of the strip's travel, there are sequentially arranged a pre-punching station, a waist scrap cutting station, a waist chamfering station, a center hollowing hole cutting station, a waist thinning station, a flange upward punching station, a downward flange forming station, a whole sheet blanking station, and a scrap cutting station.

[0025] like Figure 1 As shown, the upper mold includes an upper mold base 4. The lower end of the upper mold base 4 is provided with a first fixing plate 5, a second fixing plate 21, and a third fixing plate 30 in sequence along the direction of strip travel. The lower ends of the first fixing plate 5, the second fixing plate 21, and the third fixing plate 30 are respectively connected to a first guide plate 6, a second guide plate 20, and a third guide plate 16. The lower mold includes a lower mold base 2. The top of the lower mold base 2 is provided with a first concave template 3 opposite to the first guide plate 6, a second concave template 22 opposite to the second guide plate 20, and a third concave template 17 opposite to the third guide plate 16.

[0026] In this embodiment, the function of the first to third guide plates is to guide the upper and lower dies to align in the correct position, thereby improving the accuracy of the mold equipment and protecting the punch and die. The structural principle is that the opening and closing angle of the mold is small, and the punch does not detach from the guide plate, which can play a continuous guiding role.

[0027] Example 2

[0028] like Figure 1 As shown, the pre-punching station includes a coarse punch 7. The upper end of the coarse punch 7 is connected to the first part of the fixing plate 5, and the lower end passes through the first part of the guide plate 6. A pre-punching die 1 that mates with the coarse punch 7 is provided on the first part of the concave template 3 below the coarse punch 7. The pre-punching station is used to coarsely punch the chain plate holes.

[0029] like Figure 1 As shown, the waste cutting station includes a waste cutting punch 9. The upper end of the waste cutting punch 9 is connected to the first fixed plate 5, and the lower end passes through the first guide plate 6. A waste cutting die 8 is provided on the first concave template 3 opposite to the waste cutting punch 9. A waste cutting guide insert 10 is embedded in the first guide plate. The waste cutting punch 9 passes through the waste cutting guide insert 10 and is guided by it.

[0030] like Figure 1 As shown, the waist chamfering station includes a waist chamfering punch 11. The upper end of the waist chamfering punch 11 is embedded in the first part of the fixing plate 5, and the lower end passes through the first part of the guide plate 6. The first part of the concave template 3 opposite to the waist chamfering punch 11 is provided with a waist chamfering concave die 12.

[0031] like Figure 1 As shown, the center-cutting perforation station includes a center-cutting perforation punch 14. The top end of the center-cutting perforation punch 14 is connected to the first part of the fixing plate 5, and the lower end passes through the center-cutting perforation guide insert 15 preset in the first part of the guide plate 6 and is guided by it. A center-cutting perforation die 13 is provided on the first part of the concave template 3 below the center-cutting perforation punch 14. Note: The center perforation is a weight-reducing hole opened in the middle of the chain plate.

[0032] like Figure 1 As shown, the waist thinning station includes a waist thinning punch 18. The upper end of the waist thinning punch 18 is connected to the first fixed plate 5, and the lower end passes through the first guide plate 6 and protrudes from the lower end of the first guide plate 6. The waist thinning punch 18 achieves the thinning effect by pressing the strip down onto it with the upper die.

[0033] Example 3

[0034] like Figure 1 As shown, the flange-upward punching station includes flange-upward punching pins 19. The lower end of the flange-upward punching pin 19 is connected to the lower die base 2, and the upper end passes through the second part of the concave template 22. A compression spring is connected between the lower end of the second part of the concave template 22 and the lower die base. In this embodiment, multiple flange-upward punching pins 19 are provided according to the strip steel traveling direction, preferably four. The four flange-upward punching pins 19 are staggered to avoid mutual interference when punching workpieces in the same row.

[0035] Example 4

[0036] like Figure 1 As shown, the downward flange forming station includes a downward flange punch 27. The upper end of the downward flange punch 27 is fixed to the upper mold base, and the lower end passes through the third part fixing plate 30 and the third part guide plate 16 in sequence. The third part concave template 17 opposite to the downward flange punch 27 is provided with a downward flange punch 24. The lower end of the downward flange punch 24 is fixedly connected to the lower mold base, and the upper end passes through the downward flange punch guide insert embedded in the third part concave template.

[0037] like Figure 1 As shown, the blanking station includes a blanking punch 26, the upper end of which is connected to the third fixed plate, and the lower end of which passes through the third guide plate 16. A blanking die 25 is provided on the third concave template 17 opposite to the blanking punch 26. The scrap cutting station includes a scrap cutting upper punch 29, the upper end of which is connected to the third fixed plate 30, and the lower end of which passes through the third guide plate 16. A scrap cutting lower punch 28 is provided on the third concave template 17 opposite to the scrap cutting upper punch 29.

[0038] The working principle of this new type:

[0039] like Figure 1 As shown, the new method of punching chain plate holes involves three processes. The rough punching pin 7 and the downward flange punch 27 perform downward punching, while the upward flange punching pin 19 performs upward fine punching. This avoids the situation where multiple downward punchings result in a large tear band and insufficient brightness (existing punching methods are mostly unidirectional punching, which leads to a flange forming at the outer end of the chain plate hole, resulting in a large tear band at the lower end and insufficient brightness within the hole). The rear edge of the second guide plate 20 is chamfered to guide the strip steel under the second guide plate, preventing the strip steel from getting stuck at the junction of the first guide plate 6 and the second guide plate 20.

[0040] like Figure 1 As shown, the second part of the concave template 22 uses the spring force of a compression spring for buffering to prevent excessive wear on the flange upward punching punch 19 caused by rigid pressing material during fine punching.

[0041] like Figure 1 As shown, the third part of the concave template 17 adopts a shearing blanking method to remove the waste material generated after the waist chamfer. When the formed inner chain plate is blanked, the inner chain plate is squeezed to the discharge port of the lower die by the whole blanking punch 26 along the whole blanking concave die 25 (which is a common structure and is not shown in the figure), thereby improving the flatness of the chain plate.

Claims

1. A high-end bicycle chain inner plate integrated forming die, characterized by: The upper die and the lower die are provided with a pre-punching station, a waist waste cutting station, a waist chamfering station, a middle hollow hole cutting station, a waist thinning station, a flange upward punching station, a downward flange forming station, a whole piece blanking station and a waste cutting station in sequence along the direction of the strip steel.

2. A high-end bicycle chain inner plate integrated forming die according to claim 1, characterized in that: The upper die comprises an upper die seat, and the lower end of the upper die seat is sequentially provided with a first part of the fixed plate, a second part of the fixed plate and a third part of the fixed plate along the direction of the strip steel.

3. A high-end bicycle chain inner plate integrated forming die according to claim 2, characterized in that: The pre-punching station comprises a rough punching punch, the upper end of the rough punching punch is connected with the first part of the fixed plate, the lower end penetrates through the first part of the guide plate, and the first part of the concave die plate below the rough punching punch is provided with a pre-punching concave die matched with the rough punching punch.

4. A high-end bicycle chain inner plate integrated forming die according to claim 3, characterized in that: The waist waste cutting station comprises a waist waste cutting punch, the upper end of the waist waste cutting punch is connected with the first part of the fixed plate, the lower end penetrates through the first part of the guide plate, the first part of the concave die plate opposite to the waist waste cutting punch is provided with a waist waste cutting concave die, the first part of the guide plate is embedded with a waist waste cutting guide insert, and the waist waste cutting punch penetrates through the waist waste cutting guide insert and is guided by the waist waste cutting guide insert.

5. A high end bicycle chain inner plate integrated forming die according to claim 4, characterized in that: The waist chamfering station comprises a waist chamfering punch, the upper end of the waist chamfering punch is embedded in the first part of the fixed plate, and the lower end penetrates through the first part of the guide plate, and the first part of the concave die plate opposite to the waist chamfering punch is provided with a waist chamfering concave die.

6. A high end bicycle chain inner plate integrated forming die according to claim 5, characterized in that: The middle hollow hole cutting station comprises a middle hollow hole cutting punch, the upper end of the middle hollow hole cutting punch is connected with the first part of the fixed plate, the lower end penetrates through the middle hollow hole guide insert embedded in the first part of the guide plate and is guided by the middle hollow hole guide insert, and the first part of the concave die plate below the middle hollow hole cutting punch is provided with a middle hollow hole cutting concave die.

7. A high end bicycle chain inner plate integrated forming die according to claim 6, characterized in that: The waist thinning station comprises a waist thinning punch, the upper end of the waist thinning punch is connected with the first part of the fixed plate, and the lower end penetrates through the first part of the guide plate and protrudes from the lower end of the first part of the guide plate.

8. A high-end bicycle chain inner plate integrally formed mold according to claim 7, characterized in that: The flange upward punching station comprises a flange upward punching punch, the lower end of the flange upward punching punch is connected with the lower die seat, and the upper end penetrates through the second part of the concave die plate, and the second part of the concave die plate is connected with the lower die seat through a compression spring.

9. A high end bicycle chain inner plate integrally formed die as claimed in claim 8, characterized in that: The downward flange forming station comprises a downward flange punch, the upper end of the downward flange punch is fixed with the upper die seat, the lower end penetrates through the third part of the fixed plate and the third part of the guide plate in sequence, the third part of the concave die plate opposite to the downward flange punch is provided with a downward flange punch, the lower end of the downward flange punch is fixedly connected with the lower die seat, and the upper end penetrates through the downward flange punch guide insert embedded in the third part of the concave die plate.

10. A high end bicycle chain inner plate integrally formed die as claimed in claim 9, characterized in that: The whole blanking station comprises a whole blanking punch, the upper end of the whole blanking punch is connected with the third fixed plate, the lower end passes through the third part of the guide plate, and a whole blanking die is arranged on the third part of the die plate opposite to the whole blanking punch. The waste cutting station comprises a waste cutting upper punch, the upper end of the waste cutting upper punch is connected with the third part of the fixed plate, the lower end passes through the third part of the guide plate, and a waste cutting lower punch is arranged on the third part of the die plate opposite to the waste cutting upper punch.

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