A bending die for a bearing cage
By designing a bending die for the bearing cage, adopting an upper and lower die structure, and combining a buffer and unloading mechanism, the difficulties of traditional dies in the process of precise bending and unloading were solved, achieving high-precision bending and efficient production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG GOLDEN EMPIRE PRECISION MACHINERY TECH CO LTD
- Filing Date
- 2025-04-30
- Publication Date
- 2026-07-31
AI Technical Summary
Traditional bending dies make it difficult to precisely control the bending angle and forming accuracy when processing ring-shaped parts, resulting in quality defects such as deformation and wrinkles. Furthermore, the unloading process can easily cause the parts to stick to the die, affecting product performance and production efficiency.
A bending die for a bearing cage was designed, which adopts an upper and lower die structure, combined with a buffer mechanism and a material ejection mechanism. Precise bending and smooth material ejection are achieved through guide post positioning and slider slide, ensuring precise control of bending force and angle.
It improves the accuracy of the bending process and the consistency of products, reduces the problems of part deformation and adhesion, and improves production efficiency and product quality.
Smart Images
Figure CN224574487U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of stamping die technology, specifically relating to a bending die for a bearing cage. Background Technology
[0002] The statements in this section are merely background information related to this utility model and do not necessarily constitute prior art.
[0003] Currently, traditional bending dies often face multiple technical challenges when bending ring-shaped parts. On the one hand, it is difficult to precisely control the bending angle and forming accuracy in a single bend, resulting in large deviations in the bending angle of the parts, making it difficult to meet high-precision assembly requirements and seriously affecting the overall performance of the product. On the other hand, uneven stress on the parts during the bending process can easily lead to quality defects such as deformation and wrinkles, reducing the product qualification rate and increasing production costs. Furthermore, existing bending dies cannot perform precise secondary bending of the bearing cage during the bending process, making it difficult to effectively guarantee the positioning accuracy and bending quality of the bearing cage. The inability to precisely control the bending force and angle results in unsatisfactory pin-through bending of the bearing cage, affecting the overall performance and service life of the bearing.
[0004] Furthermore, the traditional mold ejection process is poorly designed, easily causing parts to stick to the mold during ejection. This not only increases the difficulty of manual operation and prolongs the production cycle, but also may damage the surface of the parts during forced ejection, leading to scrapping. Simultaneously, it cannot effectively absorb impact during bending, which not only accelerates mold wear but also reduces its service life. Utility Model Content
[0005] To address the aforementioned problems, this utility model provides a bending die for a bearing cage, which solves the problems of existing bending dies being unable to perform precise secondary bending of the cage during the bending process, being unable to accurately control the bending force and angle of the bearing cage, and easily causing the parts to stick to the die during material removal.
[0006] To achieve the above objectives, this utility model is implemented through the following technical solution:
[0007] This utility model provides a bending die for a bearing cage, comprising: an upper die and a lower die; the upper die is fixedly mounted on the working arm of a punch press; the lower die is fixedly mounted on the worktable of the punch press;
[0008] The upper die includes an upper die base disposed at the lower end of the working arm. The core of the upper die base is provided with a buffer mechanism. The lower end of the upper die base is provided with an upper clamping plate and a bending plate, with the bending plate disposed at the lower end of the upper clamping plate. A spring cover plate is disposed above the working arm, and a material ejection cylinder and a cylinder fixing seat are disposed above the spring cover plate. The upper die base is also provided with two guide pillars for positioning in conjunction with the guide holes of the lower die. The lower die consists of a bending die, a lower buffer mechanism, and a lower die base housing. The bending die and the lower buffer mechanism are disposed in the cavity of the lower die base housing. The bending die achieves bending of the part under the action of the lower buffer mechanism.
[0009] As a further implementation, the buffer mechanism includes a first spring, a bending top block is provided below the first spring, a slider seat fixing plate is provided below the bending top block, and the upper end of the first spring abuts against the spring cover plate; the lower end of the slider seat fixing plate is provided with an upper pressure head, which is located in a vertical slide rail at the center of the upper clamping plate and the bending plate, for bending the part once.
[0010] As a further implementation, a chamfer is provided at the lower end of the vertical slide of the bending plate for secondary bending of the steel pipe column.
[0011] As a further implementation, the upper pressure head comprises a bending slider seat, multiple bending sliders, and a positioning block; the upper end of the bending slider seat is fixedly connected to the slider seat fixing plate, and the lower end of the bending slider seat is connected to the positioning block through a damping element; the multiple bending sliders are slidably disposed on the side of the bending slider seat.
[0012] As a further implementation, the bending slider seat is frustum-shaped, and the multiple bending sliders are connected to the bending slider seat through dovetail grooves; the bending slider is wedge-shaped, and the multiple bending sliders and the bending slider seat together form a cylindrical shape; a boss is provided at the lower end of the outer arc surface of the bending slider along the axial direction.
[0013] As a further implementation, a material ejection mechanism is provided in the cavity of the bending top block. The material ejection mechanism includes a second spring, a thrust plate, and a push rod mounting seat. The lower end of the second spring abuts against the slider seat fixing plate, and the upper end abuts against the push rod mounting seat. The upper end of the push rod mounting seat is fixedly connected to the thrust plate. The telescopic rod of the material ejection cylinder passes through the cylinder fixing seat, the spring cover plate, and the bending top block and abuts against the thrust plate. A punch is provided at the end of the telescopic rod of the material ejection cylinder to push the thrust plate and disperse the impact load on the thrust plate. Multiple push rods are provided on the push rod mounting seat. The number of push rods is the same as the number of bending sliders and corresponds one-to-one.
[0014] As a further implementation, the lower die consists of a lower die base, a lower clamping plate, and a lower cover plate; the lower die base is located below the lower clamping plate, and the lower cover plate is located above the lower clamping plate; the lower die base is fixedly mounted on the worktable of the punch press.
[0015] As a further implementation, the lower buffer mechanism includes a third spring, a fourth spring, a die push rod, and a float push rod; the third spring and the fourth spring are disposed in a cavity formed between the core of the lower die holder and the lower clamping plate; the diameter of the fourth spring is smaller than the diameter of the third spring, and the fourth spring is disposed at the center of the third spring.
[0016] As a further implementation, the top end of the third spring is provided with a sliding ring, and the sliding ring has a plurality of die push rods arranged in a circumferential array, and the top end of the fourth spring is provided with a float push rod.
[0017] As a further implementation, an inner die and an outer bending float are slidably disposed on the lower cover plate in the direction perpendicular to the normal. The die push rod passes through the lower clamping plate and is connected to the bottom end of the inner die, and the float push rod passes through the lower clamping plate and is connected to the bottom end of the outer bending float.
[0018] Compared with the prior art, the advantages and positive effects of this utility model are:
[0019] This invention incorporates a buffer mechanism in the core of the upper die holder. The presence of the first spring effectively buffers the impact force when the upper die moves downward, preventing damage to the parts and allowing the positioning block to more accurately position the bearing cage. Simultaneously, the two guide pillars on the upper die holder ensure precise positioning when combined with the lower die, significantly improving the accuracy of the entire bending process and guaranteeing product consistency and stability.
[0020] This invention achieves a double bending of a part by designing a boss along the axial direction at the lower end of the outer arc surface of the bending slider. The upper pressure head at the lower end of the slider seat fixing plate first bends the part, and then the chamfer at the lower end of the vertical slide of the bending plate performs a second bend. This design not only meets complex process requirements but also ensures that the bent pins adhere tightly to the upper surface of the boss, improving product quality.
[0021] The present invention features a material ejection mechanism installed in the cavity of the bending top block. Under the action of the telescopic rod of the material ejection cylinder, the second spring contracts, and the top rod pushes the bending slider downward, thereby reducing the diameter of the cylinder formed by multiple bending sliders and stretching the damping element. This allows the bearing cage to smoothly disengage from the upper die, effectively solving the problem of material ejection difficulties in traditional devices and greatly improving production efficiency.
[0022] The lower buffer mechanism of this utility model consists of a third spring, a fourth spring, a die push rod, and a float push rod. The use of springs of different diameters allows the inner die and the outer bending float to move flexibly and in a layered manner according to the downward pressing action of the upper die. This ensures bending accuracy and can adapt to parts of different materials and specifications, thus enhancing the versatility of the equipment. Attached Figure Description
[0023] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.
[0024] Figure 1 This is a cross-sectional structural diagram of the upper pressure die of this utility model;
[0025] Figure 2 This is a cross-sectional structural diagram of the lower pressure die of this utility model.
[0026] In the diagram: 1. Working arm; 2. Upper die base; 3. Upper clamping plate; 4. Bending plate; 5. Spring cover plate; 6. Cylinder fixing seat; 7. Unloading cylinder; 8. Telescopic rod; 9. First spring; 10. Bending top block; 11. Slider seat fixing plate; 12. Bending slider seat; 13. Bending slider; 14. Positioning block; 15. Push plate; 16. Ejector rod mounting seat; 17. Second spring; 18. Ejector rod; 19. Guide post; 20. Lower die base; 21. Lower clamping plate; 22. Lower cover plate; 23. Third spring; 24. Fourth spring; 25. Sliding ring; 26. Die ejector rod; 27. Float ejector rod; 28. Outer bending float; 29. Inner die; 30. Guide hole. Detailed Implementation
[0027] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.
[0028] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise expressly indicated by the present invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0029] Example 1
[0030] This embodiment provides a bending die for a bearing cage, such as... Figures 1-2As shown, it includes: an upper die and a lower die; the upper die is fixedly mounted on the working arm 1 of the punch press; the lower die is fixedly mounted on the worktable of the punch press;
[0031] The upper die includes an upper die base 2 disposed at the lower end of the working arm 1. The core of the upper die base 2 is provided with a buffer mechanism. The lower end of the upper die base 2 is provided with an upper clamping plate 3 and a bending plate 4. The bending plate 4 is disposed at the lower end of the upper clamping plate 3. A spring cover plate 5 is disposed above the working arm 1. A material ejection cylinder 7 and a cylinder fixing seat 6 are disposed above the spring cover plate 5. Two guide posts 19 are also provided on the upper die base 2 for positioning in conjunction with the guide holes 30 of the lower die. The lower die consists of a bending die, a lower buffer mechanism, and a lower die base 20 housing. The bending die and the lower buffer mechanism are disposed in the cavity of the lower die base 20 housing. The bending die achieves bending of the part under the action of the lower buffer mechanism.
[0032] As a further implementation, the buffer mechanism includes a first spring 9, a bending top block 10 is provided below the first spring 9, and a slider seat fixing plate 11 is provided below the bending top block 10. The upper end of the first spring 9 abuts against the spring cover plate 5. The lower end of the slider seat fixing plate 11 is provided with an upper pressure head, which is located in a vertical slide rail at the center of the upper clamping plate 3 and the bending plate 4, for bending the part once.
[0033] As a further implementation, a chamfer is provided at the lower end of the vertical slide of the bending plate 4 for secondary bending of the steel pipe column of the part.
[0034] As a further implementation, the upper pressure head consists of a bending slider seat 12, multiple bending sliders 13, and a positioning block 14; the upper end of the bending slider seat 12 is fixedly connected to the slider seat fixing plate 11, and the lower end of the bending slider seat 12 is connected to the positioning block 14 through a damping element; the multiple bending sliders 13 are slidably disposed on the side of the bending slider seat 12.
[0035] As a further implementation, the bending slider seat 12 is frustum-shaped, and the multiple bending sliders 13 are connected to the bending slider seat 12 through dovetail grooves; the bending sliders 13 are wedge-shaped, and the multiple bending sliders 13 and the bending slider seat 12 together form a cylindrical shape; a boss is provided axially at the lower end of the outer arc surface of the bending slider 13.
[0036] As a further implementation, a material ejection mechanism is provided in the cavity of the bending top block 10. The material ejection mechanism includes a second spring 17, a thrust plate 15, and a push rod mounting seat 16. The lower end of the second spring 17 abuts against the slider seat fixing plate 11, and the upper end abuts against the push rod mounting seat 16. The upper end of the push rod mounting seat 16 is fixedly connected to the thrust plate 15. The telescopic rod 8 of the material ejection cylinder 7 passes through the cylinder fixing seat, the spring cover plate 5, and the bending top block 10 and abuts against the thrust plate 15. A punch is provided at the end of the telescopic rod 8 of the material ejection cylinder 7 to push the thrust plate 15 and disperse the impact load on the thrust plate 15. A plurality of push rods 18 are provided on the push rod mounting seat 16. The number of push rods 18 is the same as the number of bending sliders 13 and corresponds one-to-one.
[0037] As a further implementation, the lower die consists of a lower die base 20, a lower clamping plate 21, and a lower cover plate 22; the lower die base 20 is disposed below the lower clamping plate 21, and the lower cover plate 22 is disposed above the lower clamping plate 21; the lower die base 20 is fixedly disposed on the worktable of the punch press.
[0038] As a further implementation, the lower buffer mechanism includes a third spring 23, a fourth spring 24, a die push rod 26, and a float push rod 27; the third spring 23 and the fourth spring 24 are disposed in the cavity formed between the core of the lower die base 20 and the lower clamping plate 21; the diameter of the fourth spring 24 is smaller than the diameter of the third spring 23, and the fourth spring 24 is disposed at the center of the third spring 23.
[0039] As a further implementation, the top end of the third spring 23 is provided with a sliding ring 25, and the sliding ring 25 has a plurality of die push rods 26 arranged in a circular array on its circumference, and the top end of the fourth spring 24 is provided with a float push rod 27.
[0040] As a further implementation, an inner die 29 and an outer bending float 28 are slidably disposed on the lower cover plate 22 in the direction perpendicular to the normal. The die push rod 26 passes through the lower clamping plate 21 and is connected to the bottom end of the inner die 29. The float push rod 27 passes through the lower clamping plate 21 and is connected to the bottom end of the outer bending float 28.
[0041] The work process includes the following steps:
[0042] S1. The upper die moves slowly downward under the drive of the working arm 1 of the punch press, and the positioning block 14 begins to contact the bearing cage on the lower die; the upper die continues to move downward, the first spring 9 begins to contract, the positioning block 14 begins to position the bearing cage on the lower die, the inner die 29 moves downward, the fourth spring 24 begins to contract, the outer bending float 28 stops, and under the pressure of the inner wall of the outer bending float 28 and the lower end face of the boss, the bending claw of the bearing cage performs the first 90° bend at this time;
[0043] S2. The upper die continues to move downward, and the bending plate 4 begins to contact the outer bending float 28. The outer bending float 28 begins to move downward until the bending plate 4 contacts the bent claw of the bearing cage. The upper die continues to move downward, and the bending plate 4 performs a second 30° bend on the bent claw of the bearing cage until the bent claw is attached to the upper surface of the boss.
[0044] S3. The upper die is reset, the telescopic rod 8 of the ejector cylinder 7 is activated, pushing the push plate 15 downward, the second spring 17 begins to contract, the push rod 18 pushes the bending slider 13 downward, at this time the diameter of the cylinder formed by the multiple bending sliders 13 decreases, the damping element is stretched until the bearing cage disengages from the upper die.
[0045] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.
Claims
1. A bending die for a bearing cage, characterized in that, include: An upper die and a lower die; the upper die is fixedly mounted on the working arm of the punch press; the lower die is fixedly mounted on the worktable of the punch press; The upper die includes an upper die base disposed at the lower end of the working arm. The core of the upper die base is provided with a buffer mechanism. The lower end of the upper die base is provided with an upper clamping plate and a bending plate, with the bending plate disposed at the lower end of the upper clamping plate. A spring cover plate is disposed above the working arm, and a material ejection cylinder and a cylinder fixing seat are disposed above the spring cover plate. The upper die base is also provided with two guide pillars for positioning in conjunction with the guide holes of the lower die. The lower die consists of a bending die, a lower buffer mechanism, and a lower die base housing. The bending die and the lower buffer mechanism are disposed in the cavity of the lower die base housing. The bending die achieves bending of the part under the action of the lower buffer mechanism.
2. A bending die for a bearing retainer as set forth in claim 1, characterized in that, The buffer mechanism includes a first spring, a bending top block is provided below the first spring, a slider seat fixing plate is provided below the bending top block, and the upper end of the first spring abuts against the spring cover plate; the lower end of the slider seat fixing plate is provided with an upper pressure head, which is located in a vertical slide rail at the center of the upper clamping plate and the bending plate, for bending the part once.
3. A bending die for a bearing retainer as set forth in claim 2, characterized in that, The lower end of the vertical slide of the bending plate is chamfered for secondary bending of the steel pipe column.
4. The bending die for a bearing retainer of claim 2 wherein, The upper pressure head consists of a bending slider seat, multiple bending sliders, and a positioning block; the upper end of the bending slider seat is fixedly connected to the slider seat fixing plate, and the lower end of the bending slider seat is connected to the positioning block through a damping element; the multiple bending sliders are slidably disposed on the side of the bending slider seat.
5. A bending die for a bearing cage as defined in claim 4, characterized in that The bending slider seat is frustum-shaped, and multiple bending sliders are connected to the bending slider seat through dovetail grooves; the bending slider is wedge-shaped, and multiple bending sliders and the bending slider seat together form a cylindrical shape; a boss is provided at the lower end of the outer arc surface of the bending slider along the axial direction.
6. A bending die for a bearing retainer as set forth in claim 4, characterized in that, The cavity of the bending top block is equipped with a material ejection mechanism, which includes a second spring, a thrust plate, and a push rod mounting seat. The lower end of the second spring abuts against the slider seat fixing plate, and the upper end abuts against the push rod mounting seat. The upper end of the push rod mounting seat is fixedly connected to the thrust plate. The telescopic rod of the ejection cylinder passes through the cylinder fixing seat, the spring cover plate, and the bending top block, and then abuts against the thrust plate. The end of the telescopic rod of the ejection cylinder is equipped with a punch for pushing the thrust plate and dispersing the impact load on the thrust plate. The push rod mounting seat is equipped with multiple push rods, the number of which is the same as the number of bending sliders, and they correspond one-to-one.
7. The bending die for a bearing retainer of claim 1 wherein, The lower die consists of a lower die base, a lower clamping plate, and a lower cover plate; the lower die base is located below the lower clamping plate, and the lower cover plate is located above the lower clamping plate; the lower die base is fixedly mounted on the worktable of the punch press.
8. A bending die for a bearing cage according to claim 7, characterized in that The lower buffer mechanism includes a third spring, a fourth spring, a die push rod, and a float push rod; the third spring and the fourth spring are disposed in the cavity formed between the core of the lower die base and the lower clamping plate; the diameter of the fourth spring is smaller than the diameter of the third spring, and the fourth spring is disposed at the center of the third spring.
9. A bending die for a bearing cage as defined in claim 8, characterized in that The third spring has a sliding ring at its top end, and the sliding ring has a plurality of die push rods arranged in a circular array. The fourth spring has a float push rod at its top end.
10. A bending die for a bearing cage as defined in claim 9, characterized in that An inner die and an outer bending float are slidably disposed on the lower cover plate in the direction perpendicular to the normal. The die push rod passes through the lower clamping plate and is connected to the bottom end of the inner die. The float push rod passes through the lower clamping plate and is connected to the bottom end of the outer bending float.