Hinge shaft straightening stamping die
By designing a straightening stamping die for hinge shafts, the problem of low straightness accuracy during hinge shaft stamping was solved, achieving efficient and precise hinge shaft processing and improving the versatility of the die.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING SHOUHANG SCI TECH DEV CO
- Filing Date
- 2024-12-21
- Publication Date
- 2026-04-28
AI Technical Summary
The existing hinge shaft stamping method has low straightness accuracy, which leads to uneven force on the head, causing offset and affecting the perpendicularity of the shaft cap position.
The hinge shaft straightening stamping die includes an upper die plate, a lower die plate, an upper extrusion assembly, a lower extrusion assembly, and a limit spring assembly. Through the cooperation of the limit spring post, spring, and sliding assembly, the hinge shaft can be efficiently and accurately shaped and straightened.
It simplifies the process steps, improves production efficiency, ensures the straightness accuracy of the hinge shaft, enhances the versatility and adaptability of the mold, and can quickly complete the processing of hinge shafts of different specifications.
Smart Images
Figure CN224168612U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a stamping die, specifically a hinge shaft straightening stamping die. Background Technology
[0002] In mechanical manufacturing, steel wire is often used as the raw material for shaft parts. Due to its inherent properties and the influence of various factors during production, transportation, and storage, steel wire is generally bent. However, shaft parts have strict requirements for straightness during manufacturing and subsequent applications. Before processing, shaft products need to undergo straightening and stamping. The longest hinge shaft is 260mm. Using existing stamping methods (such as…) Figure 1 As shown, the hinge shaft is vertically stamped on the mold by a punch. Due to the low straightness accuracy of the hinge shaft, it is extremely difficult to ensure that the head of the hinge shaft is subjected to uniform force during the stamping process. This uneven force will inevitably cause the head of the hinge shaft to shift during the stamping process, resulting in a deviation in the verticality of the shaft cap position. Utility Model Content
[0003] To address the problem that low straightness accuracy in existing hinge shaft stamping methods leads to uneven force distribution at the head, causing offset and affecting the perpendicularity of the shaft cap, the purpose of this utility model is to provide a hinge shaft straightening stamping die.
[0004] To achieve the above objectives, the present invention adopts the following technical solution:
[0005] A hinge shaft straightening stamping die includes an upper die plate, a lower die plate, an upper extrusion assembly disposed on the upper die plate, a lower extrusion assembly disposed on the lower die plate, and a limiting spring-loaded assembly disposed between the upper die plate and the lower die plate. A hinge shaft die cavity is provided between the upper extrusion assembly and the lower extrusion assembly. The limiting spring-loaded assembly includes a limiting spring-loaded post I and a limiting spring-loaded post II disposed on the lower die plate. The upper die plate is provided with through holes that match the limiting spring-loaded post I and the limiting spring-loaded post II. Spring I and spring II are respectively sleeved around the periphery of the limiting spring-loaded post I and the limiting spring-loaded post II.
[0006] Preferably, the upper extrusion assembly includes an upper forming block, an upper straightening block I, and an upper straightening block II disposed on the upper template, and the lower extrusion assembly includes a lower forming block, a lower straightening block I, and a lower straightening block II disposed on the lower template, and the hinge shaft mold cavity is disposed between the upper forming block, the upper straightening block I, the upper straightening block II and the lower forming block, the lower straightening block I, and the lower straightening block II.
[0007] Preferably, a sliding component is further provided between the upper template and the lower template. The sliding component includes an upper sliding block on the upper template, a limiting spring block on the lower template, and a lower sliding block slidably connected within the limiting spring block. A groove is formed in the limiting spring block, and the lower sliding block is slidably connected within the groove. A spring III is provided between the inner wall of the groove and the lower sliding block. An inclined surface I is provided at the lower end of the upper sliding block, and an inclined surface II is provided on one side of the lower sliding block that contacts and connects with the inclined surface I.
[0008] Preferably, the lower sliding block is provided with a limiting block, and the upper sliding block has a slot that matches the limiting block.
[0009] Preferably, a limiting block I is provided on one end face of the lower sliding block near the upper forming block and the lower forming block.
[0010] Preferably, a limiting block II is also provided on the lower template, and the limiting block II is attached to the end face of the upper straight block II and the lower straight block II away from the upper straight block I and the lower straight block I.
[0011] Preferably, limiting post I and limiting post II are further provided between the upper template and the lower template.
[0012] The positive and beneficial effects of this utility model are as follows:
[0013] 1. This utility model integrates the straightening and stamping operations, which originally required multiple independent processes, into a single machine, simplifying the process steps. By controlling the mechanical movement of the mold, it achieves efficient and precise shaping of the hinge shaft material, resulting in high straightness accuracy of the hinge shaft and enabling rapid processing of the hinge shaft, thus increasing production efficiency. Furthermore, by replacing the upper forming block, upper straightening block I, upper straightening block II, and lower forming block, lower straightening block I, and lower straightening block II of different specifications, hinge shaft mold cavities of different specifications can be formed, meeting the production needs of hinge shafts and shaft caps of different lengths, diameters, and specifications, greatly improving the versatility and adaptability of the mold. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the existing stamping die structure for the hinge shaft;
[0015] Figure 2 This is a schematic diagram of the hinge shaft straightening stamping die structure of this utility model;
[0016] Figure 3 This is a schematic diagram of the lower template structure of this utility model;
[0017] Figure 4 This is a schematic diagram of the straightening block structure of this utility model;
[0018] Figure 5 This is a cross-sectional view of the sliding component of this utility model;
[0019] Figure 6 This is a schematic diagram of the upper sliding block structure of this utility model;
[0020] Figure 7 This is one of the schematic diagrams of the sliding block structure of this utility model;
[0021] Figure 8 This is the second schematic diagram of the sliding block structure of this utility model;
[0022] In the diagram: 1-Upper template, 2-Upper sliding block, 3-Limiting spring-loaded post I, 4-Spring I, 5-Limiting spring-loaded block, 6-Lower template, 7-Lower sliding block, 8-Limiting block I, 9-Lower forming block, 10-Limiting post I, 11-Lower straightening block I, 12-Lower straightening block II, 13-Limiting block II, 14-Limiting spring-loaded post II, 15-Spring II, 16-Upper straightening block II, 17-Upper straightening block I, 18-Upper forming block, 19-Spring III, 20-Limiting post II, 21-Limiting block, 22-Slot, 23-Groove, 24-Hinge shaft mold cavity. Detailed Implementation
[0023] The present invention will be further described below with reference to some specific embodiments.
[0024] See Figures 2-8 A hinge shaft straightening stamping die includes an upper template 1, a lower template 6, an upper extrusion assembly disposed on the upper template 1, a lower extrusion assembly disposed on the lower template 6, and a limiting spring-loaded assembly disposed between the upper template 1 and the lower template 6. A hinge shaft cavity 24 is formed between the upper extrusion assembly and the lower extrusion assembly. The upper half of the hinge shaft cavity is formed on the upper extrusion assembly, and the lower half is formed on the lower extrusion assembly. The limiting spring-loaded assembly includes a limiting spring-loaded post I3 and a limiting spring-loaded post II14 disposed on the lower template 6. The upper template 1 is provided with through holes that match the limiting spring-loaded post I3 and the limiting spring-loaded post II14. Springs I4 and II15 are respectively sleeved around the limiting spring-loaded post I3 and the limiting spring-loaded post II14. The lower ends of springs I4 and springs II15 are fixed to the lower template 6, and the upper ends abut against the upper template 1.
[0025] Furthermore, the upper extrusion assembly includes an upper forming block 18, an upper straightening block I 17, and an upper straightening block II 16 disposed on the upper template 1, and the lower extrusion assembly includes a lower forming block 9, a lower straightening block I 11, and a lower straightening block II 12 disposed on the lower template 6, and the hinge shaft mold cavity 24 is disposed between the upper forming block 18, the upper straightening block I 17, the upper straightening block II 16 and the lower forming block 9, the lower straightening block I 11, and the lower straightening block II 12.
[0026] Furthermore, a sliding component is provided between the upper template 1 and the lower template 6. The sliding component includes an upper sliding block 2 on the upper template 1, a limiting spring block 5 on the lower template 6, and a lower sliding block 7 slidably connected within the limiting spring block 5. An inclined surface I is provided at the lower end of the upper sliding block 2, and an inclined surface II is provided on one side of the lower sliding block 7 that contacts and connects with the inclined surface I. A groove 23 is provided in the limiting spring block 5, and a slider is provided at the bottom of the lower sliding block 7 that is slidably connected to the groove 23. A spring III 19 is provided between the inner wall of the groove 23 and the slider of the lower sliding block 7.
[0027] Furthermore, a limiting block 21 is provided on the lower sliding block 7, and a slot 22 matching the limiting block 21 is provided on the upper sliding block 2. Through the cooperation of the limiting block 21 and the slot 22, the upper sliding block 2 and the lower sliding block 7 are connected together and do not separate during movement.
[0028] Furthermore, a limiting block I8 is provided on the end face of the lower sliding block 7 near the upper forming block 18 and the lower forming block 9. During the stamping process, the left end of the steel wire is subjected to extrusion pressure under the combined action of the upper and lower forming blocks and the limiting block I. Through the shape design of the hinge shaft mold cavity, the left end of the steel wire is guided to gradually form a shaft cap shape that meets the requirements, thereby completing the straightening of the shaft and the stamping process of the shaft cap.
[0029] Furthermore, a limiting block II 13 is also provided on the lower template 6. The limiting block II 13 fits against the end face of the upper straight block II 16 and the lower straight block II 12 away from the upper straight block I 17 and the lower straight block I 11. During the stamping process, the steel wire undergoes plastic deformation, and its length gradually extends due to continuous extrusion. This extension is uniform and controllable, ensuring the dimensional accuracy of the final product. As the steel wire continues to extend, its right end gradually approaches and eventually contacts the limiting block II. After the right end of the steel wire contacts the limiting block II, further extension to the right is effectively prevented, ensuring the dimensional accuracy of the product.
[0030] Furthermore, limiting posts I 10 and II 20 are provided between the upper template 1 and the lower template 6. Limiting posts I 10 and II 20 limit the lowest stamping position of the upper template 1.
[0031] The method of using this utility model hinge shaft straightening stamping die includes the following steps:
[0032] (1) The movement of the press is the power source of the entire processing process. When the press moves downward, it contacts the upper die plate. The upper die plate moves downward synchronously with the movement trend of the press. The downward movement of the upper die plate drives the upper sliding block, the upper forming block, the upper straightening block I and the upper straightening block II to move downward together.
[0033] (2) When the upper sliding block moves downward, it first contacts the lower sliding block. The contact between the upper and lower sliding blocks on the inclined surface of the ramp structure will convert the vertical movement of the upper sliding block into the horizontal movement of the lower sliding block. Then the limiting block I installed on the end face of the lower sliding block will also move to the right. Relying on the slot structure in the upper and lower sliding blocks and the limiting of the lower sliding block and the limiting rebound block, the upper sliding block will not move downward after moving to the specified distance. Therefore, the lower sliding block will also stop moving to the right. At the same time, during the downward movement of the upper template, the upper forming block, the upper straight block I and the upper straight block II will all move downward under the drive of the upper template. Then the upper forming block, the upper straight block I and the upper straight block II will contact the lower forming block, the lower straight block I and the lower straight block II. The upper template will contact the limiting post I and the limiting post II.
[0034] (3) The steel wire is precisely placed in the hinge shaft mold cavity surrounded by the lower forming block, lower straightening block I, lower straightening block II and upper forming block, upper straightening block I, upper straightening block II. The steel wire is subjected to the combined action of these components and the corresponding upper forming block, upper straightening block I and upper straightening block II, and a series of orderly and powerful impacts and extrusions are applied to the steel wire. Then the steel wire begins to undergo plastic deformation. The length of the steel wire will gradually extend due to continuous extrusion. This extension is uniform and controllable, ensuring the dimensional accuracy of the final product. As the steel wire continues to extend, its right end will gradually approach and eventually contact the limiting block II. After the right end of the steel wire contacts the limiting block II, further extension to the right is effectively prevented, ensuring the dimensional accuracy of the product. At the same time, the left end of the steel wire is subjected to extrusion force under the combined action of the upper and lower forming blocks and the limiting block I. Through the shape design of the hinge shaft mold cavity, the left end of the steel wire is guided to gradually form a shaft cap shape that meets the requirements, thereby completing the straightening of the shaft and the stamping of the shaft cap.
[0035] (4) After processing, the press will rise rapidly. As the press moves upward, the spring III installed on the limit spring pins I and II and the limit spring block will release elastic potential energy, and the upper template will move upward. The rise of the upper template will drive the upper sliding block, the upper forming block, the upper straight block I and the upper straight block II to move upward together. At the same time, the lower sliding block will drive the limit block I to move to the left and return to its original position.
[0036] (5) After the above components have completed their movement, the operator can easily use appropriate tools to remove the stamped hinge shaft from the mold, and then continue the above operation to successfully achieve mass production of the hinge shaft.
[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.
Claims
1. A hinge shaft straightening stamping die, characterized in that, It includes an upper template (1), a lower template (6), an upper extrusion assembly set on the upper template (1), a lower extrusion assembly set on the lower template (6), and a limiting spring assembly set between the upper template (1) and the lower template (6). A hinge shaft mold cavity (24) is provided between the upper extrusion assembly and the lower extrusion assembly. The limiting spring assembly includes a limiting spring post I (3) and a limiting spring post II (14) set on the lower template. A through hole matching the limiting spring post I (3) and the limiting spring post II (14) is provided on the upper template (1). Spring I (4) and spring II (15) are respectively sleeved around the limiting spring post I (3) and the limiting spring post II (14).
2. The hinge shaft straightening stamping die according to claim 1, characterized in that, The upper extrusion assembly includes an upper forming block (18), an upper straightening block I (17), and an upper straightening block II (16) disposed on the upper template (1). The lower extrusion assembly includes a lower forming block (9), a lower straightening block I (11), and a lower straightening block II (12) disposed on the lower template (6). The hinge shaft mold cavity (24) is disposed between the upper forming block (18), the upper straightening block I (17), the upper straightening block II (16) and the lower forming block (9), the lower straightening block I (11), and the lower straightening block II (12).
3. The hinge shaft straightening stamping die according to claim 2, characterized in that, A sliding component is also provided between the upper template (1) and the lower template (6). The sliding component includes an upper sliding block (2) on the upper template (1), a limiting spring block (5) on the lower template (6), and a lower sliding block (7) slidably connected in the limiting spring block (5). A groove (23) is opened in the limiting spring block (5). The lower sliding block (7) is slidably connected in the groove (23). A spring III (19) is provided between the inner wall of the groove (23) and the lower sliding block (7). An inclined surface I is provided at the lower end of the upper sliding block (2), and an inclined surface II is provided on one side of the lower sliding block (7) that contacts and connects with the inclined surface I.
4. The hinge shaft straightening stamping die according to claim 3, characterized in that, The lower sliding block (7) is provided with a limiting block (21), and the upper sliding block (2) is provided with a slot (22) that matches the limiting block (21).
5. The hinge shaft straightening stamping die according to claim 3, characterized in that, The lower sliding block (7) is provided with a limiting block I (8) on the end face of the side of the upper forming block (18) and the lower forming block (9).
6. The hinge shaft straightening stamping die according to claim 2, characterized in that, The lower template (6) is also provided with a limiting block II (13), which is attached to the end face of the upper straight block II (16) and the lower straight block II (12) away from the upper straight block I (17) and the lower straight block I (11).
7. The hinge shaft straightening stamping die according to any one of claims 1-6, characterized in that, Limiting posts I (10) and limiting posts II (20) are also provided between the upper template (1) and the lower template (6).