Manufacturing process and processing equipment for a cylindrical roller bearing cage

Abstract

The present application discloses a manufacturing process and processing equipment for a cylindrical roller bearing retainer, the manufacturing process of which includes: S1. Continuous blanking: using an automatic feeder for continuous feeding, during which the strip material is sequentially punched with positioning holes, strip shape, pre-punched, fine-punched, cut, and sloped; S2. Rolling: using a punching machine and a symmetrical rolling die to roll the strip material, performing contour positioning processing on the strip material during the rolling process, and using a rotary motor for rolling; S3. Welding: using automatic welding equipment to weld the two end interfaces of the rolled material, positioning the rolled material from both the inside and outside of the rolled material during the welding process. During the continuous blanking process, the roller window of the bearing retainer is pre-punched and fine-punched, thereby improving the structural strength of the product, ensuring product quality, improving the hole opening efficiency, and reducing production costs.

Description

Technical Field

[0001] The present invention relates to the technical field of bearing retainer processing, and in particular to a manufacturing process and processing equipment for a cylindrical roller bearing retainer. Background Art

[0002] A bearing cage is a bearing component that partially wraps around all or part of the roller body and moves with it, isolating the rolling elements and usually guiding and retaining them inside the bearing.

[0003] In the manufacture of existing cylindrical roller bearing retainers, laser cutting is generally used to obtain strips of the required size, and then pockets are cut into the strips. Then, rolling and welding are performed to obtain an annular bearing retainer, and finally surface treatment, heat treatment and other processes are performed to finally obtain the finished product. However, the energy consumption and processing costs of strip cutting and pocket cutting in the current manufacturing process of cylindrical roller bearing retainers are high, and the cut strips are uneven, requiring subsequent shaping processes. In addition, during the rolling and welding processes, the production cycle of rolling is slow, the positioning effect is poor, the consistency and qualified rate of the products are low, and during welding, inaccurate positioning, inconsistent roundness of the inner and outer diameters of the bearing retainer, and roundness that does not meet the standards often occur, and the welding operation is inconvenient.

[0004] Therefore, how to improve the product quality, production efficiency and reduce production costs of bearing cages needs to be solved urgently. Summary of the Invention

[0005] To address the technical issues described in the aforementioned background technology, the first objective of this application is to propose a manufacturing process for cylindrical roller bearing cages, wherein the roller windows of the bearing cages are pre-punched and fine-punched during the continuous blanking process, thereby improving the structural strength of the product, ensuring product quality, increasing drilling efficiency, and reducing production costs. A second objective is to propose a processing device for cylindrical roller bearing cages, which accelerates the production cycle of the rolling process, improves production efficiency, enhances the positioning stability of the bearing cage during welding, and improves welding efficiency and quality, thereby improving product quality.

[0006] In order to achieve the first objective above, this application adopts the following technical solution:

[0007] This application proposes a manufacturing process for a cylindrical roller bearing cage, which includes the following steps:

[0008] S1. Continuous feeding: Automatic feeder is used for continuous feeding. During the feeding process, the strip material is punched with positioning holes, strip shape, pre-punched, fine-punched, cut and sloped.

[0009] S2. Rolling: The strip is rolled using a punch and a symmetrical rolling die. During the rolling process, the strip is contoured and positioned, and a rotary motor is used for rolling.

[0010] S3. Welding: Use automatic welding equipment to weld the two ends of the rolled material. During the welding process, the rolled material is positioned from both the inside and outside of the rolled material.

[0011] Among them, the punching of positioning holes is for punching positioning holes for the roller windows of the bearing retainer, the material strip shape is for shaping the periphery of the strip material, the pre-punching is for pre-punching the roller windows, the fine punching is for fine punching the roller windows, and the cutting is for cutting off the strip material; the pressing slope is for pressing the periphery of one side of the strip material toward the other side into an oblique angle.

[0012] From the above, an automatic feeder is used for feeding, and then the positioning holes, material strip shape, pre-punching and fine punching are performed, and finally cutting and slope pressing are performed. The positioning holes can be used to position the opening of the roller window, and the material strip shape can provide a top reference for subsequent punching. Pre-punching can reduce the strength of the punching knife edge, and fine punching can meet the product data requirements when the roller window is sloped. In this way, the manufacturing process of this application has a high degree of automation and high production efficiency. In the continuous blanking process, the roller window of the bearing cage is pre-punched and fine punched, which reduces the knife edge strength, improves the structural strength of the product, ensures product quality, and improves the hole opening efficiency and reduces production costs.

[0013] As an optional implementation method for manufacturing cylindrical roller bearing cages, the automatic welding equipment's welding fixtures simultaneously adhere to both the inside and outside of the packaged material. This ensures consistent and standard roundness of the inner and outer diameters of the bearing cage, as well as accurate and stable positioning, significantly improving welding efficiency and quality.

[0014] As an optional implementation of the manufacturing process of a cylindrical roller bearing cage, it also includes the following steps:

[0015] S4. Calibration: Calibrate the bearing cage after welding to provide a measurement reference for the subsequent slope pressing process;

[0016] S5. Slope pressing: Each vertical beam of each roller window is sloped to form a sloped surface. Specifically, each vertical beam of the product is sloped to form a special contact form and slope shape, and the contact position is guaranteed to be free of sharp corners. The radial and axial assembly of the bearing meets the requirements. The slope pressing mold can adopt a floating positioning structure, which is accurate and easy to process. The slope pressing die can be processed by CNC precision engraving. The mold can form a special slope surface according to special requirements, and has a wide range of applications.

[0017] S6. Finish turning: Finish turning the two end faces of the bearing retainer to ensure that the product height, bottom height and bottom height variation fully meet the product technical requirements.

[0018] In order to achieve the second purpose of this application, this application also proposes a processing equipment for a cylindrical roller bearing retainer, which works according to the manufacturing process of a cylindrical roller bearing retainer in any one of the above items, and includes a welding tool, the welding tool includes a clamping mold and a supporting mold, the clamping mold is driven by a clamping power structure, and the clamping mold clamps the bearing retainer from the outside of the bearing retainer; the clamping mold includes at least a first clamping part and a second clamping part, and a welding port is left at the joint between the first clamping part and the second clamping part; the supporting mold supports the bearing retainer on the inner side of the bearing retainer, and the supporting mold is provided with a welding groove at the position corresponding to the welding port.

[0019] When the bearing retainer needs to be welded, the inner surface of the bearing retainer is fitted with the outer side of the supporting mold. The supporting mold is a circular supporting mold, which is concentric with the bearing retainer. The function of the supporting mold is to carry and position the bearing retainer to ensure the roundness of the bearing retainer. Then the clamping power structure is started to drive the clamping mold so that the first clamping part and the second clamping part are close to each other, and the bearing retainer is clamped from the outside of the bearing retainer. The clamping mold plays the role of clamping, positioning and fixing the bearing retainer. At this point, the inner and outer surfaces of the bearing retainer are fitted with the supporting mold and the clamping mold respectively, ensuring the consistency and standardization of the inner and outer diameter roundness of the bearing retainer after forming.

[0020] After the first and second clamping parts clamp the bearing retainer, a weld joint is left at the joint between them. This facilitates welding of the two ends of the bearing retainer by the welding equipment. The support mold has welding grooves at the corresponding locations of the weld joints to avoid welding and to provide heat dissipation. Throughout the welding process, the support mold and clamping mold fit tightly against the inside and outside of the bearing retainer, ensuring stable positioning and preventing weld point shifting.

[0021] As an optional implementation of equipment for processing cylindrical roller bearing cages, the clamping die has a positioning boss on one side of the bearing cage, corresponding to the window in the bearing cage. This boss guides and positions the bearing cage, ensuring a smoother weld during welding and ensuring product consistency.

[0022] As an optional implementation method of processing equipment for cylindrical roller bearing retainers, the invention includes a support frame, the support frame including a support base plate, a support baffle, and a support table, the support baffle being connected to the support base plate, and the support table being connected to the support base plate; one side of the clamping mold abuts against the support base plate, and the clamping mold moves along the surface of the support base plate; the clamping power structure is connected to the support baffle, and the support baffle supports and fixes the clamping power structure; the support mold is connected to the support table, and the support table supports and fixes the support mold. Thus, the support base plate provides a moving plane for the clamping mold, so that the movement of the clamping mold is smooth and the structure is stable, the support baffle can fix and support the clamping power structure, and the support table can stabilize the position of the support mold.

[0023] As an optional implementation of a cylindrical roller bearing cage processing device, the support base is provided with a slide rail along which the clamping die can move to clamp and release the bearing cage. The slide rail guides the movement of the clamping die, ensuring smooth movement and also providing space for movement.

[0024] As an optional implementation method of a processing equipment for a cylindrical roller bearing retainer, it also includes a rolling tool, which includes an upper mold mechanism, a rotating shaft mechanism and a lower mold mechanism, wherein: the upper mold mechanism includes a connected upper mold base and an upper forming die, the upper forming cavity of the upper forming die is semicircular, and the upper mold base can drive the upper forming die to move up and down; the lower mold mechanism includes a stamping block and a connected lower mold base and a lower forming die, the stamping block is located in the lower forming die, the stamping block can enter and exit the lower forming cavity of the lower forming die, the lower forming cavity is semicircular, the lower forming cavity is arranged opposite to the opening of the upper forming cavity, and the lower forming cavity and the upper forming cavity can form a complete circle; the rotating shaft mechanism is located between the upper forming die and the lower forming die, the rotating shaft mechanism includes a circular rotating shaft, the circular rotating shaft is axially parallel to the upper forming cavity, the circular rotating shaft is connected to the stamping block, and the circular rotating shaft can enter the upper forming cavity and the lower forming cavity respectively under the drive of the stamping block.

[0025] Thus, when rolling a workpiece, the workpiece is first placed between the circular rotating shaft and the upper forming die. The punch block moves upward and out of the lower forming cavity, driving the circular rotating shaft upward toward the upper forming die. During the upward movement, the circular rotating shaft drives the workpiece to gradually enter the upper forming cavity and punch the workpiece, thereby forming a U-shaped workpiece with the opening facing downward. After the U-shaped workpiece is formed, the two ends will shrink in the lower forming die. The lower forming die temporarily supports the U-shaped workpiece and fixes it in the upper forming cavity. At this time, the punch block moves downward into the lower forming cavity, driving the circular rotating shaft into the lower forming cavity. Then, the upper die seat drives the upper forming die downward. During the downward pressure of the upper forming die, the two ends of the U-shaped workpiece opening merge with the edge of the lower forming cavity of the lower forming die until the upper forming cavity coincides with the circular rotating shaft, thus forming a complete circular workpiece surrounding the circular rotating shaft. With the above working process as a cycle, a large number of rolled workpieces can be produced quickly. The workpiece can complete the entire rolling process in one go. No manual assistance is required in the intermediate process, and only manual material loading and unloading is required, thereby improving product consistency and production efficiency.

[0026] The rolled workpiece is made around a circular rotating shaft, so the roundness of the rolled workpiece is closely related to the circular rotating shaft. In this embodiment, the circular rotating shaft can rotate axially, which can avoid long-term and frequent local repeated pressure causing local plastic deformation of the circular rotating shaft, and thus causing the roundness of the rolled workpiece to be unqualified, thereby ensuring product quality. Specifically, the circular rotating shaft can be rotated in advance each time stamping is performed.

[0027] Since the circular rotating shaft is connected to the punch block, it can move synchronously with the punch block and stably enter and exit the lower forming cavity. However, the lack of restriction between the circular rotating shaft and the upper forming die will cause the circular rotating shaft to be unable to smoothly enter and exit the upper forming cavity. Therefore, as an optional implementation method of a processing device for a cylindrical roller bearing retainer, the rotating shaft mechanism includes a guide plate, one end of which is connected to an end face of the circular rotating shaft, and the upper forming die is also provided with a guide cavity, the guide plate is located in the guide cavity, and the guide plate can move up and down along the edge of the guide cavity. In this way, the guide plate is located in the guide cavity and can move repeatedly in the guide cavity. The edge of the guide cavity can provide a guiding and limiting function for the guide plate, thereby guiding and limiting the circular rotating shaft in and out of the upper forming cavity, so that the circular rotating shaft can stably enter and exit the upper forming cavity, thereby improving the stability of the structure.

[0028] As an optional implementation of a cylindrical roller bearing cage processing device, the rotating shaft mechanism further includes a rotating rod coaxially connected to the circular rotating shaft. The rotating rod passes through the circular rotating shaft and is rotatably connected to the guide plate, thereby driving the circular rotating shaft in axial rotation. In this case, the circular rotating shaft is connected to the punch block via the guide plate, and rotating the rotating rod rotates the circular rotating shaft, providing simple, convenient, and labor-saving operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0030] Figure 1 is a schematic diagram of the three-dimensional structure of a welding tool in an exemplary embodiment;

[0031] Figure 2 Schematic diagram of the three-dimensional structure of a clamping die of a welding tool in an exemplary embodiment;

[0032] Figure 3 It is a schematic diagram of the three-dimensional structure of a rolling tool in an exemplary embodiment.

[0033] a. Welding tool; b. Rolling tool;

[0034] a1. Clamping mold; a11. First clamping portion; a12. Second clamping portion; a13. Welding port; a14. Positioning boss;

[0035] a2. Support mold; a21. Welding groove;

[0036] a3. Clamping power structure;

[0037] a4. Support frame; a41. Support base; a42. Support baffle; a43. Support platform; a44. Slide rail; a45. Reinforcement block; a46. Weight reduction hole;

[0038] b1. Upper die mechanism; b11. Upper die base; b12. Upper forming die; b121. Upper forming cavity; b122. Guide protrusion;

[0039] b2. Lower die mechanism; b21. Stamping block; b22. Lower die base; b23. Lower forming die; b231. Lower forming cavity; b232. Guide cavity; b233. Guide groove;

[0040] b3. Shaft mechanism; b31. Circular shaft; b32. Guide plate; b321. Oil reservoir; b33. Rotating rod;

[0041] b4. shock-absorbing column;

[0042] b5. Positioning plate. DETAILED DESCRIPTION

[0043] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described with reference to the accompanying drawings. The same reference numerals in the drawings represent components with the same structure or similar structures but the same functions.

[0044] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0045] This application first proposes a manufacturing process for a cylindrical roller bearing cage, which includes the following steps:

[0046] S1. Continuous feeding: Automatic feeder is used for continuous feeding. During the feeding process, the strip material is punched with positioning holes, strip shape, pre-punched, fine-punched, cut and sloped.

[0047] S2. Rolling: The strip is rolled using a punch and a symmetrical rolling die. During the rolling process, the strip is contoured and positioned, and a rotary motor is used for rolling.

[0048] S3. Welding: Use automatic welding equipment to weld the two ends of the rolled material. During the welding process, the rolled material is positioned from both the inside and outside of the rolled material.

[0049] Among them, punching positioning holes is to punch positioning holes for the roller windows of the bearing retainer, the material strip shape is to shape the periphery of the strip material, pre-punching is to pre-punch the roller windows, fine punching is to fine punch the roller windows, and cutting is to cut off the strip material; pressing the slope is to press the periphery of one side of the strip material to the other side into an oblique angle.

[0050] From the above, an automatic feeder is used for feeding, and then the positioning holes, material strip shape, pre-punching and fine punching are performed, and finally cutting and slope pressing are performed. The positioning holes can be used to position the opening of the roller window, and the material strip shape can provide a top reference for subsequent punching. Pre-punching can reduce the strength of the punching knife edge, and fine punching can meet the product data requirements when the roller window is sloped. In this way, the manufacturing process of this application has a high degree of automation and high production efficiency. In the continuous blanking process, the roller window of the bearing cage is pre-punched and fine punched, which reduces the knife edge strength, improves the structural strength of the product, ensures product quality, and improves the hole opening efficiency and reduces production costs.

[0051] In an exemplary embodiment of the manufacturing process for cylindrical roller bearing cages, the welding tooling of automated welding equipment simultaneously adheres to both the inside and outside of the packaged material. This ensures consistent and standard roundness of the inner and outer diameters of the bearing cage, as well as accurate and stable positioning, significantly improving welding efficiency and quality.

[0052] In an exemplary embodiment of a process for manufacturing a cylindrical roller bearing cage, the process further includes the following steps:

[0053] S4. Calibration: Calibrate the bearing cage after welding to provide a measurement reference for the subsequent slope pressing process;

[0054] S5. Slope pressing: Each vertical beam of each roller window is sloped to form a sloped surface. Specifically, each vertical beam of the product is sloped to form a special contact form and slope shape, and the contact position is guaranteed to be free of sharp corners. The radial and axial assembly of the bearing meets the requirements. The slope pressing mold can adopt a floating positioning structure, which is accurate and easy to process. The slope pressing die can be processed by CNC precision engraving. The mold can form a special slope surface according to special requirements, and has a wide range of applications.

[0055] S6. Finish turning: Finish turning the two end faces of the bearing retainer to ensure that the product height, bottom height and bottom height variation fully meet the product technical requirements.

[0056] The present application also proposes a cylindrical roller bearing cage processing device, which works according to any one of the above cylindrical roller bearing cage manufacturing processes, with reference to Figure 1-2 It includes a welding tool a, which includes a clamping mold a1 and a supporting mold a2. The clamping mold a1 is driven by a clamping power structure a3, and the clamping mold a1 clamps the bearing retainer from the outside of the bearing retainer; the clamping mold a1 includes at least a first clamping part a11 and a second clamping part a12, and a welding port a13 is left at the joint between the first clamping part a11 and the second clamping part a12; the supporting mold a2 supports the bearing retainer on the inner side of the bearing retainer, and the supporting mold a2 is provided with a welding groove a21 at the position corresponding to the welding port a13.

[0057] When the bearing retainer needs to be welded, the inner surface of the bearing retainer is fitted with the outer side of the support mold a2. The support mold a2 is a circular support mold a2, which is concentric with the bearing retainer. The function of the support mold a2 is to carry and position the bearing retainer to ensure the roundness of the bearing retainer. Then the clamping power structure a3 is started to drive the clamping mold a1, so that the first clamping part a11 and the second clamping part a12 are close to each other, and the bearing retainer is clamped from the outside of the bearing retainer. The clamping mold a1 plays the role of clamping, positioning and fixing the bearing retainer. At this point, the inner surface and outer surface of the bearing retainer are fitted with the support mold a2 and the clamping mold a1 respectively, ensuring the consistency and standardization of the inner and outer diameter roundness of the bearing retainer after forming.

[0058] After the first and second clamping parts a11 and a12 clamp the bearing retainer, a weld opening a13 is left at the joint between them. This facilitates welding of the two ends of the bearing retainer by the welding equipment. The support mold a2 has a welding groove a21 at the location corresponding to the weld opening a13, which avoids the connection during welding and also serves to dissipate heat. Throughout the welding process, the support mold a2 and the clamping mold a1 fit tightly against the inner and outer sides of the bearing retainer, ensuring stable positioning and preventing the weld points from shifting.

[0059] The first clamping part a11 and the second clamping part a12 are symmetrical in shape, which makes it more convenient to take and place the bearing retainer. To ensure that the first clamping part a11 and the second clamping part a12 can move flexibly, their upper, lower, left and right sides are designed with planes, and the diagonal sides are designed with slopes, which can reduce the weight of the mold and reduce the driving force of the clamping power structure a3.

[0060] In an exemplary embodiment of a cylindrical roller bearing cage processing apparatus, the size of the weld opening a13 corresponds to the size of the roller window of the bearing cage. If the weld opening a13 is too large, it will affect the stability of the bearing cage; if it is too small, it will be inconvenient to operate the welding apparatus. Therefore, the size of the weld opening is adjusted to the size of the roller window of the bearing cage, which can reserve maximum welding space without affecting the stability of the bearing cage.

[0061] In an exemplary embodiment of a cylindrical roller bearing cage processing apparatus, a positioning boss a14 is formed on one side of a clamping mold a1, which clamps the bearing cage. This boss a14 corresponds to the window in the bearing cage. This boss a14 guides and positions the bearing cage, ensuring a smoother weld during welding and ensuring product consistency.

[0062] In an exemplary embodiment of a cylindrical roller bearing retainer processing apparatus, at least one positioning boss a14 is provided, and these bosses are evenly spaced within the inner side of the clamping mold a1. When there is only one positioning boss a14, it is located in the middle of the inner side of the clamping mold a1. Specifically, the boss a14 is located at half the height of the clamping mold a1. Those skilled in the art will appreciate that multiple positioning bosses a14 may be provided. When multiple positioning bosses a14 are provided, the spacing between the bosses a14 must be more precisely determined to prevent the roller window of the bearing retainer from entering the positioning boss a14.

[0063] In an exemplary embodiment of a processing device for a cylindrical roller bearing retainer, the device includes a support frame a4, which includes a support base plate a41, a support baffle a42, and a support platform a43. The support baffle a42 is connected to the support base plate a41, and the support platform a43 is connected to the support base plate a41. One side of a clamping mold a1 abuts against the support base plate a41, and the clamping mold a1 moves along the surface of the support base plate a41. The clamping power structure a3 is connected to the support baffle a42, which supports and fixes the clamping power structure a3. The support mold a2 is connected to the support platform a43, which supports and fixes the support mold a2. Thus, the support base plate a41 provides a moving plane for the clamping mold a1, ensuring smooth movement and a stable structure of the clamping mold a1. The support baffle a42 can fix and support the clamping power structure a3, and the support platform a43 can stabilize the position of the support mold a2.

[0064] In an exemplary embodiment of a cylindrical roller bearing retainer manufacturing apparatus, a support base plate a41 is provided with a slide rail a44, along which a clamping mold a1 can move to clamp and release the bearing retainer. The slide rail a44 guides the movement of the clamping mold a1, ensuring smooth movement and providing space for movement.

[0065] In an exemplary embodiment of a processing device for a cylindrical roller bearing retainer, a reinforcement block a45 is also included. The reinforcement block a45 is located on the side of the support baffle a42 close to the support platform a43. The reinforcement block a45 is respectively connected to the support base plate a41 and the support baffle a42. The reinforcement block a45 can enhance the supporting strength of the support baffle a42 for the clamping power structure a3.

[0066] In an exemplary embodiment of a cylindrical roller bearing cage processing apparatus, the clamping power structure a3 includes a cylinder.

[0067] In an exemplary embodiment of a cylindrical roller bearing cage processing apparatus, a clamping mold a1 is provided with weight-reducing holes a46 around the circumference of the bearing cage, thereby reducing the mold weight while maintaining the overall strength of the mold.

[0068] In an exemplary embodiment of a cylindrical roller bearing cage processing apparatus, a supporting mold a2 is provided with weight-reducing holes a46 around the circumference of the bearing cage, thereby reducing the mold weight while retaining the overall strength of the mold.

[0069] In an exemplary embodiment of a cylindrical roller bearing cage processing device, referring to Figure 3, which also includes a rolling tool b, which includes an upper mold mechanism b1, a rotating shaft mechanism b3 and a lower mold mechanism b2, wherein: the upper mold mechanism b1 includes a connected upper mold base b11 and an upper forming die b12, the upper forming cavity b121 of the upper forming die b12 is semicircular, and the upper mold base b11 can drive the upper forming die b12 to move up and down; the lower mold mechanism b2 includes a punching block b21 and a connected lower mold base b22 and a lower forming die b23, the punching block b21 is located in the lower forming die b23, and the punching block b21 can enter and exit the lower forming cavity b2 of the lower forming die b23 31, the lower molding cavity b231 is semicircular, and the lower molding cavity b231 is arranged opposite to the opening of the upper molding cavity b121, and the lower molding cavity b231 and the upper molding cavity b121 can form a complete circle; the rotating shaft mechanism b3 is located between the upper molding die b12 and the lower molding die b23, and the rotating shaft mechanism b3 includes a circular rotating shaft b31, and the circular rotating shaft b31 is axially parallel to the upper molding cavity b121, and the circular rotating shaft b31 is connected to the punching block b21. The circular rotating shaft b31 can enter the upper molding cavity b121 and the lower molding cavity b231 respectively under the drive of the punching block b21.

[0070] Therefore, refer to Figure 3 When rolling the workpiece, first place the workpiece between the circular rotating shaft b31 and the upper forming die b12. The punching block b21 moves up and out of the lower forming cavity b231, driving the circular rotating shaft b31 to move up toward the upper forming die b12. During the upward movement, the circular rotating shaft b31 drives the workpiece to gradually enter the upper forming cavity b121 and punch the workpiece, thereby obtaining a U-shaped workpiece with the opening facing downward. After the U-shaped workpiece is formed, the two ends will shrink in the lower forming die b23, and the lower forming die b23 will temporarily support the U-shaped workpiece. The workpiece is fixed in the upper forming cavity b121. At this time, the punch block b21 moves down into the lower forming cavity b231, driving the circular rotating shaft b31 into the lower forming cavity b231. Then, the upper die holder b11 drives the upper forming die b12 to press down. During the downward pressing process of the upper forming die b12, the two ends of the U-shaped workpiece opening are guided by the edge of the lower forming cavity b231 of the lower forming die b23 to merge until the upper forming cavity b121 coincides with the circular rotating shaft b31, and a complete circular workpiece surrounding the circular rotating shaft b31 is obtained. Taking the above working process as a cycle, a large number of rolled workpieces can be produced quickly. The workpiece can complete the entire rolling process at one time. No manual assistance is required in the intermediate process. Only manual material loading and unloading is required, which improves product consistency and production efficiency.

[0071] The rolled workpiece is made around the circular rotating shaft b31, so the roundness of the rolled workpiece is closely related to the circular rotating shaft b31. In this embodiment, the circular rotating shaft b31 can rotate axially, which can avoid long-term and frequent local repeated pressure causing local plastic deformation of the circular rotating shaft b31, and thus causing the roundness of the rolled workpiece to be unqualified, thereby ensuring product quality. Specifically, the circular rotating shaft b31 can be rotated in advance each time stamping is performed.

[0072] Since the circular rotating shaft b31 is connected to the stamping block b21, it can move synchronously with the stamping block b21 and stably enter and exit the lower molding cavity b231. However, the lack of restriction between the circular rotating shaft b31 and the upper molding die b12 will cause the circular rotating shaft b31 to be unable to smoothly enter and exit the upper molding cavity b121. Therefore, in an exemplary embodiment of a processing equipment for a cylindrical roller bearing retainer, the rotating shaft mechanism b3 includes a guide plate b32, one end of the guide plate b32 is connected to an end face of the circular rotating shaft b31, and the upper molding die b12 is also provided with a guide cavity b232, and the guide plate b32 is located in the guide cavity b232, and the guide plate b32 can move up and down along the edge of the guide cavity b232. In this way, the guide plate b32 is located in the guide cavity b232 and can move repeatedly in the guide cavity b232. The edge of the guide cavity b232 can provide guidance and limiting functions for the guide plate b32, thereby guiding and limiting the circular rotating shaft b31 in and out of the upper molding cavity b121, so that the circular rotating shaft b31 can stably enter and exit the upper molding cavity b121, thereby improving the structural stability.

[0073] In an exemplary embodiment of a cylindrical roller bearing retainer processing apparatus, the rotating shaft mechanism b3 further includes a rotating rod b33, which is coaxially connected to the circular rotating shaft b31. The rotating rod b33 passes through the circular rotating shaft b31 and is rotatably connected to the guide plate b32, driving the circular rotating shaft b31 in axial rotation. The circular rotating shaft b31 is connected to the punching block b21 via the guide plate b32. Rotating the rotating rod b33 rotates the circular rotating shaft b31, making operation simple, convenient, and labor-saving.

[0074] Reference Figure 3 The upper forming die b12 is provided with guide protrusions b122 on its side, and the lower forming die b23 is provided with guide grooves b233 on its side that match the guide protrusions b122. As a result, when the lower forming die b23 is pressed downward by the upper die holder b11, the guide protrusions b122 on both sides of the upper forming die b12 enter the guide grooves b233 on both sides of the lower forming die b23, guiding and limiting the downward pressure of the lower forming die b23, further improving structural stability and the quality of the rolled workpiece. In other embodiments, the upper forming die b12 can be provided with guide grooves b233 on its side, and the lower forming die b23 can be provided with guide protrusions b122 on its side that match the guide grooves b233.

[0075] In an exemplary embodiment of a cylindrical roller bearing retainer manufacturing apparatus, a damping column b4 is provided on the end of the upper forming die b12 facing the lower forming die b23; alternatively, a damping column b4 is provided on the end of the lower forming die b23 facing the upper forming die b12. In this way, the damping column b4 can cushion the impact force of stamping, thereby reducing damage to the die and ensuring its service life.

[0076] In an exemplary embodiment of a cylindrical roller bearing cage processing apparatus, the apparatus further includes positioning plates b5, comprising a first positioning plate b5 and a second positioning plate b5, respectively connected to the sides of the upper forming die b12. The positioning plates b5 are used to position and position the workpiece. This allows manual unloading of the workpiece by simply positioning the workpiece directly on the positioning plates b5, making the operation simple, convenient, and efficient, and improving rolling efficiency.

[0077] In an exemplary embodiment of a cylindrical roller bearing cage processing apparatus, the punching blocks b21 include a first punching block b21 and a second punching block b21, which are arranged on either side of the lower forming cavity b231 along the axial direction of the circular shaft b31. This ensures the balance of the shaft b31 and the reliability of the punching process.

[0078] In an exemplary embodiment of a cylindrical roller bearing cage manufacturing apparatus, the portion where the first punch block b21 and / or the second punch block b21 connect to the circular shaft b31 is recessed downward along the edge of the circular shaft b31. This ensures the stability of the circular shaft b31 and improves structural stability.

[0079] In an exemplary embodiment of a cylindrical roller bearing cage processing apparatus, an oil reservoir b321 is provided on the side of the guide plate b32 where it connects to the circular rotating shaft b31. Because the guide plate b32 repeatedly moves within the guide cavity b232, lubricating oil or grease is required. To prevent rapid lubricant consumption, the oil reservoir b321 is provided on the guide plate b32 to store the lubricant and ensure smooth movement of the guide plate b32 within the guide cavity b232.

[0080] In an exemplary embodiment of a cylindrical roller bearing retainer processing device, the oil storage tank b321 is X-shaped, I-shaped or O-shaped. Figure 3 , the oil storage tank b321 is X-shaped.

[0081] In an exemplary embodiment of a processing device for a cylindrical roller bearing retainer, a positioning platform is provided on the outer wall of the circular rotating shaft b31, and the positioning platform corresponds to the size and shape of the roller window of the finished bearing retainer. Furthermore, the positioning platform can also elastically expand and contract in the radial direction of the circular rotating shaft b31, so that the positioning platform can enter and exit the circular rotating shaft b31. In this way, the positioning platform can position a roller window of the bearing retainer, ensure the stability of the bearing retainer during the rolling process, and can also calibrate the roller window. Specifically, the positioning platform is located on the upper semicircle of the circular rotating shaft b31, and the positioning platform elastically expands and contracts in the radial direction of the circular rotating shaft b31. During the process of punching the blank into a U-shaped workpiece, the position of the bearing retainer can be automatically adjusted so that the roller window enters the positioning platform.

[0082] The various embodiments in this specification are described in a progressive manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences between the other embodiments. In particular, the system embodiments are generally similar to the method embodiments, so the description is relatively simple. For relevant parts, refer to the description of the method embodiments.

[0083] The above are merely embodiments of the present invention and are not intended to limit the present invention. It will be apparent to those skilled in the art that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are intended to be included within the scope of the claims of the present invention.

Claims

1. A process for manufacturing a cylindrical roller bearing cage, characterized in that: The following steps are involved: S1. Continuous feeding: Automatic feeder is used for continuous feeding. During the feeding process, the strip material is punched with positioning holes, strip shape, pre-punched, fine-punched, cut and sloped. S2. Rolling: The strip is rolled using a punch and a symmetrical rolling die. During the rolling process, the strip is contoured and positioned, and a rotary motor is used for rolling. The rolling tooling includes an upper die mechanism, a rotating shaft mechanism, and a lower die mechanism, wherein: The upper die mechanism includes an upper die base and an upper forming die connected to each other, the upper forming cavity of the upper forming die is semicircular, and the upper die base can drive the upper forming die to move up and down; The lower die mechanism includes a punching block and a connected lower die base and a lower forming die. The punching block is located in the lower forming die and can enter and exit the lower forming cavity of the lower forming die. The lower forming cavity is semicircular and is arranged opposite to the opening of the upper forming cavity. The lower forming cavity and the upper forming cavity can form a complete circle. The rotating shaft mechanism is located between the upper forming die and the lower forming die, and the rotating shaft mechanism includes a circular rotating shaft, which is parallel to the axial direction of the upper forming cavity and connected to the punching block. The circular rotating shaft can enter the upper forming cavity and the lower forming cavity respectively under the drive of the punching block; The circular rotating shaft can be rotated axially. After each stamping, the circular rotating shaft is rotated to avoid long-term and frequent local repeated pressure causing local plastic deformation and affecting the roundness of the rolled workpiece, thereby improving product consistency and product quality; It also includes a positioning plate, the positioning plate includes a first positioning plate and a second positioning plate respectively connected to both sides of the upper forming die, and the positioning plate is used to place and position the workpiece; A positioning platform is provided on the outer wall of the circular rotating shaft. The positioning platform corresponds to the size and shape of the roller window of the finished bearing cage. The positioning platform can be elastically extended and retracted along the radial direction of the circular rotating shaft, so that the positioning platform can move in and out of the circular rotating shaft to position the roller window of the bearing cage and ensure the stability of the bearing cage during the rolling process. When the workpiece is rolled, the blank is manually positioned directly on the positioning plate, and the punching block moves up and out of the lower forming cavity, driving the circular rotating shaft to move up in the direction of the upper forming die. During the upward movement, the circular rotating shaft drives the workpiece to gradually enter the upper forming cavity and punch the workpiece, thereby obtaining a U-shaped workpiece with the opening facing downward. In the process of punching the blank into a U-shaped workpiece, the positioning table enters the roller window, and after the U-shaped workpiece is formed, the two ends will shrink in the lower forming die, and the lower forming die temporarily supports the U-shaped workpiece and fixes it in the upper forming cavity. At this time, the punching block moves down into the lower forming cavity, driving the circular rotating shaft into the lower forming cavity, and then the upper die seat drives the upper forming die to press down. During the downward pressing process of the upper forming die, the two ends of the U-shaped workpiece opening are merged along the edge of the lower forming cavity of the lower forming die until the upper and lower forming cavities coincide with the circular rotating shaft, and a complete circular workpiece surrounding the circular rotating shaft can be obtained. S3. Welding: Use automatic welding equipment to weld the two ends of the rolled material. During the welding process, the rolled material is positioned from both the inside and outside of the rolled material.

2. The manufacturing process of a cylindrical roller bearing cage according to claim 1, characterized in that: The welding tool of the automatic welding equipment is bonded to the inner side and the outer side of the package material at the same time.

3. The manufacturing process of a cylindrical roller bearing cage according to claim 1, characterized in that: The following steps are also included: S4. Calibration: Calibrate the bearing cage after welding; S5. Slope pressing: Slope each vertical beam of each roller window to form a slope shape; S6. Finish turning: Perform finish turning on both end faces of the bearing retainer.

4. A cylindrical roller bearing cage processing equipment according to any one of claims 1 to 3, characterized in that: The welding tool comprises: A clamping die is driven by a clamping power structure, and the clamping die clamps the bearing retainer from the outside of the bearing retainer; the clamping die includes at least a first clamping portion and a second clamping portion, and a welding joint is left at the joint between the first clamping portion and the second clamping portion; A supporting mold is provided, wherein the supporting mold supports the bearing retainer on the inner side of the bearing retainer, and the supporting mold is provided with a welding groove at a position corresponding to the welding port.

5. The processing equipment for cylindrical roller bearing cage according to claim 4, characterized in that: A positioning boss is provided on one side of the clamping die for clamping the bearing retainer, and the positioning boss corresponds to the window of the bearing retainer.

6. The processing equipment for cylindrical roller bearing cage according to claim 4, characterized in that: The support frame includes a support base, a support baffle and a support platform, wherein the support baffle is connected to the support base, and the support platform is connected to the support base; One side of the clamping mold abuts against the supporting base plate, and the clamping mold moves along the surface of the supporting base plate; The clamping power structure is connected to the supporting baffle, and the supporting baffle supports and fixes the clamping power structure; the supporting mold is connected to the supporting platform, and the supporting platform supports and fixes the supporting mold.

7. The processing equipment for cylindrical roller bearing cage according to claim 6, characterized in that: The supporting base plate is provided with a slide rail, and the clamping mold can move along the slide rail to clamp and release the bearing retainer.

8. The cylindrical roller bearing cage processing equipment according to claim 4, characterized in that: The rotating shaft mechanism includes a guide plate, one end of which is connected to an end face of the circular rotating shaft. The upper forming die is also provided with a guide cavity. The guide plate is located in the guide cavity and can move up and down along the edge of the guide cavity.

9. The processing equipment for cylindrical roller bearing cage according to claim 8, characterized in that: The rotating shaft mechanism further includes a rotating rod, which is coaxially connected to the circular rotating shaft. The rotating rod passes through the circular rotating shaft and is rotationally connected to the guide plate. The rotating rod can drive the circular rotating shaft to rotate axially.

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