A processing mold and processing device for thin-walled bearing retainer

Abstract

The utility model discloses a processing die and processing device for a thin-walled bearing retainer, comprising: an upper die assembly, having a punch, the punch comprising a first ball socket punch and a second ball socket punch, the cross section of the first ball socket punch being a U-shaped surface, the cross section of the second ball socket punch comprising an arcuate surface and a guide surface connected to the opening of the arcuate surface, the width of the first ball socket punch being greater than the width of the arcuate surface of the second ball socket punch; a lower die assembly, having a clamp for clamping a material strip, the lower die assembly having a first positioning groove and a second positioning groove. The punch comprises a first ball socket punch and a second ball socket punch, the shapes of the first ball socket punch and the second ball socket punch are different, and the width of the first ball socket punch is greater than the width of the arcuate surface of the second ball socket punch, so that the width of the processed first ball socket can be greater than the width of the second ball socket, and the ball in the first ball socket can rotate and move to adjust the force position and reduce the problem of ball jamming.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing processing, in particular to a processing mold and a processing device for a thin-wall bearing retainer. Background Art

[0002] Bearing is an important component in modern mechanical equipment. Its main function is to support the mechanical rotating body, reduce the friction coefficient of the mechanical rotating body during movement, and ensure the rotation accuracy of the mechanical rotating body.

[0003] Thin-walled bearings are small, light, compact and stable bearing products, widely used in precision machinery, aerospace, automobiles, robots and other fields. Its structure mainly consists of inner ring, outer ring, rolling element and cage. Among them, the inner ring and outer ring are the main parts of the thin-walled bearing, and the rolling element rolls between the inner and outer rings. The function of the cage is to keep the position of the rolling element stable and separate the rolling elements to prevent them from colliding with each other.

[0004] Usually, the cage is provided with a ball pocket (also called a ball socket), and the rolling body is confined in the ball pocket but can rotate in the ball pocket. However, when the bearing is subjected to uneven force, the rolling body is prone to get stuck in the ball pocket.

[0005] Therefore, how to provide a processing mold for a thin-walled bearing cage to realize the ball pockets processed on the thin-walled bearing cage to reduce the problem of rolling element sticking is a technical problem that technical personnel need to solve urgently. Utility Model Content

[0006] In view of this, the utility model provides a processing mold for a thin-walled bearing cage, so as to realize processing of different ball pockets on the thin-walled bearing cage to reduce the problem of rolling element sticking. In addition, the utility model also provides a processing device having the processing mold for the thin-walled bearing cage.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A processing die for a thin-walled bearing cage, comprising:

[0009] An upper die assembly, wherein the upper die assembly has a punch for punching a material strip, the punch comprising a first ball socket punch and a second ball socket punch, the first ball socket punch being used to punch out a first ball socket on the material strip, the second ball socket punch being used to punch out a second ball socket on the material strip, the cross section of the first ball socket punch being a U-shaped surface, the cross section of the second ball socket punch comprising an arcuate surface and a guide surface connected to an opening of the arcuate surface, the width of the guide surface gradually increasing from the opening of the arcuate surface toward a direction away from the opening of the arcuate surface, and the width of the first ball socket punch being greater than the width of the arcuate surface of the second ball socket punch;

[0010] The lower die assembly has a first positioning groove corresponding to the first ball and socket punch and a second positioning groove corresponding to the second ball and socket punch.

[0011] Preferably, in the above-mentioned processing mold, the upper mold assembly includes:

[0012] An upper die base, the upper die base is used to be connected to a machine tool, and the punch is detachably connected to the upper die base;

[0013] a stripper plate, through which the punch passes, and along which the stripper plate is movable;

[0014] A spring is arranged between the stripper plate and the upper die seat and is used for resetting the stripper plate.

[0015] Preferably, in the above-mentioned processing mold, the stripper plate has a guide groove, and the punch cooperates with the guide groove and can move along the guide groove.

[0016] Preferably, in the above-mentioned processing mold, the lower mold assembly includes:

[0017] A lower die base, the lower die base being used for connecting with a machine tool;

[0018] A lower die groove, wherein the lower die groove is detachably mounted on the lower die base, and the lower die groove has the first positioning groove and the second positioning groove;

[0019] The clamp is installed on a side of the lower die groove facing the upper die assembly.

[0020] Preferably, in the above-mentioned processing mold, the fixture includes:

[0021] An adjusting frame, wherein one side of the adjusting frame has a mounting groove, and the lower mold groove is located in a space enclosed by the adjusting frame;

[0022] A guide plate, the guide plate is detachably fixed to the side wall of the adjustment frame and abuts against a side of the adjustment frame away from the mounting groove;

[0023] A locking plate, one side of which is located in the adjusting frame and opposite to the guide plate, a accommodating groove for the material strip is formed between the locking plate and the guide plate; the other side extends out of the adjusting frame through the mounting groove, one of the two side surfaces of the locking plate and the guide plate close to each other has an avoidance groove, the avoidance groove is used to avoid the punch, and the other is a plane;

[0024] A driving member is connected to the locking plate and is used to drive the locking plate and the guide plate to clamp the material strip.

[0025] Preferably, in the above-mentioned processing mold, one of the stripper plate and the lower mold groove has a first guide column, and the other has a first guide sleeve for positioning and cooperating with the first guide column, and the locking plate and / or the guide plate has a mounting hole for the first guide column to pass through;

[0026] and / or,

[0027] One of the upper die base and the lower die base is provided with a second guide column, and the other is provided with a second guide sleeve positioned with the second guide column.

[0028] Preferably, in the above-mentioned processing mold, the mounting hole is a waist-shaped hole extending along the moving direction of the locking plate.

[0029] Preferably, in the above-mentioned processing mold, the lower mold groove has a positioning block for positioning the material strip, and the positioning block cooperates with the first ball socket and / or the second ball socket of the material strip to limit the position.

[0030] A processing device for a thin-walled bearing retainer comprises the processing mold described in any one of the above items.

[0031] The utility model discloses a processing mold for a thin-walled bearing retainer, wherein the punch comprises a first ball socket punch and a second ball socket punch, and the shapes of the first ball socket punch and the second ball socket punch are different, so that ball sockets with different shapes can be processed, and the width of the first ball socket punch is greater than the width of the arc surface of the second ball socket punch, so that the width of the processed first ball socket can be greater than the width of the second ball socket, and the ball in the first ball socket can rotate and move to adjust the force position and reduce the problem of ball jamming. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 It is a schematic structural diagram of a thin-walled bearing retainer disclosed in an embodiment of the utility model;

[0034] Figure 2 It is a structural schematic diagram of a processing mold for a thin-walled bearing retainer disclosed in an embodiment of the utility model;

[0035] Figure 3 It is a front view of a processing mold of a thin-walled bearing retainer disclosed in an embodiment of the utility model;

[0036] Figure 4 It is a structural schematic diagram of a lower die assembly of a processing die for a thin-walled bearing retainer disclosed in an embodiment of the utility model;

[0037] Figure 5 It is a partial structural schematic diagram of a lower die assembly of a processing die for a thin-walled bearing retainer disclosed in an embodiment of the utility model;

[0038] Figure 6 It is a structural schematic diagram of the locking plate of the lower mold assembly disclosed in the embodiment of the utility model;

[0039] Figure 7 It is a structural schematic diagram of the guide plate of the lower mold assembly disclosed in the embodiment of the utility model;

[0040] Figure 8 A top view of a lower die groove of a lower die assembly disclosed in an embodiment of the utility model;

[0041] Fig. 9 It is a structural schematic diagram of the upper mold assembly disclosed in the embodiment of the utility model;

[0042] Fig.10 It is a structural schematic diagram of a part of the structure of the upper mold assembly disclosed in the embodiment of the utility model;

[0043] Fig.11 It is a structural schematic diagram of a punch of an upper die assembly disclosed in an embodiment of the utility model;

[0044] Fig.12 It is a structural schematic diagram of the unloading plate of the upper mold assembly disclosed in the embodiment of the utility model. DETAILED DESCRIPTION

[0045] The utility model discloses a processing die for a thin-walled bearing cage, so as to realize processing of different ball pockets on the thin-walled bearing cage to reduce the problem of rolling body jamming. In addition, the utility model also discloses a processing device having the processing die for the thin-walled bearing cage.

[0046] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0047] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0048] Thin-walled bearings are small, light, compact and stable bearing products, widely used in precision machinery, aerospace, automobiles, robots and other fields. Its structure mainly consists of inner ring, outer ring, rolling element and cage. Among them, the inner ring and outer ring are the main parts of the thin-walled bearing, and the rolling element rolls between the inner and outer rings. The function of the cage is to keep the position of the rolling element stable and separate the rolling elements to prevent them from colliding with each other.

[0049] Usually, the cage is provided with a ball socket, and the rolling body is confined in the ball socket but can rotate in the ball socket. However, when the bearing is subjected to uneven force, the rolling body is prone to get stuck in the ball socket.

[0050] like Figure 1 As shown, the thin-walled bearing retainer 100 has a first ball socket 101 and a second ball socket 102, wherein the first ball socket 101 is a U-shaped groove, and the second ball socket 102 includes a ball socket with an opening, and the side wall at the opening of the ball socket is an inclined surface that gradually expands from the ball socket to a direction away from the ball socket. Balls are arranged in the ball socket and the first ball socket 101. Since the size of the first ball socket 101 along the circumferential direction of the thin-walled bearing retainer 100 is larger than the diameter of the ball socket, the balls in the first ball socket 101 will move during the rotation. When the bearing is unevenly stressed and causes the balls to get stuck, the balls in the first ball socket 101 can change the stress position by sliding, thereby reducing the probability of getting stuck.

[0051] Combination Figures 2 to 12 As shown, the present application discloses a processing mold for a thin-walled bearing retainer, including an upper mold assembly 1 and a lower mold assembly 2.

[0052] The upper die assembly 1 has a punch 16 for punching the material strip 3. The punch 16 includes a first ball-socket punch 161 and a second ball-socket punch 162. The first ball-socket punch 161 is used to punch out a first ball socket (for Figure 1 The first ball socket 101 in the material strip 3 is punched out by the second ball socket punch 162. Figure 1 The cross section of the first ball socket punch 161 is a U-shaped surface, and the cross section of the second ball socket punch 162 includes an arc surface and a guide surface connected to the opening of the arc surface, and the width of the guide surface gradually increases from the opening of the arc surface to the direction away from the opening of the arc surface. The cross section of the first ball socket punch 161 is a U-shaped surface, so that a ball socket with a U-shaped structure can be punched out on the material strip 3, and the arc surface of the cross section of the second ball socket punch 162 can punch out an arc groove on the material strip 3, and the guide surface can punch out an opening at the arc groove, and the side of the buckle is an inclined surface.

[0053] The width of the first ball socket punch 161 is greater than the width of the arcuate surface of the second ball socket punch 162 , so that the width of the first ball socket is greater than the width of the second ball socket, so that the ball in the first ball socket can move.

[0054] It should be noted that the shape and size of the cross-section of the first ball socket punch 161 and the second ball socket punch 162 can be set according to the shape and size of the ball socket of the thin-walled bearing retainer 100. Of course, the first ball socket punch 161 and the second ball socket punch 162 can be arranged alternately, or be set accordingly according to the ball socket of the thin-walled bearing retainer 100, and both are within the protection range.

[0055] The punch 16 can move relative to the lower die assembly 2 , and the lower die assembly 2 has a clamp for clamping the material strip 3 . The lower die assembly 2 has a first positioning groove 272 corresponding to the first ball-and-socket punch 161 and a second positioning groove 274 corresponding to the second ball-and-socket punch 162 .

[0056] During the processing of the material strip 3, the material strip 3 is clamped in the lower mold assembly 2 by a clamp to fix the material strip 3, and the machine tool is started to drive the upper mold assembly 1 to move toward the lower mold assembly 2 until the first ball socket punch 161 is inserted into the first positioning groove 272, and the second ball socket punch 162 is inserted into the second positioning groove 274, so as to realize the processing of the first ball socket and the second ball socket on the material strip 3.

[0057] The punch of the processing mold of the thin-walled bearing retainer in the present application includes a first ball socket punch 161 and a second ball socket punch 162, and the shapes of the first ball socket punch 161 and the second ball socket punch 162 are different. Therefore, ball sockets with different shapes can be processed, and the width of the first ball socket punch 161 is greater than the width of the arc surface of the second ball socket punch 162, so that the width of the processed first ball socket can be greater than the width of the second ball socket, and the ball in the first ball socket can rotate and move to adjust the force position and reduce the problem of ball jamming.

[0058] Combination Figures 9 to 12 As shown, in some embodiments, the upper die assembly 1 includes: an upper die base 11 , a punch fixing plate 12 , a stripper plate 13 , a spring 14 and a punch 16 .

[0059] The upper die base 11 is used to connect with the machine tool, the punch 16 is detachably fixedly connected to the punch fixing plate 12, and the punch fixing plate 12 is detachably connected to the upper die base 11 through the upper pad, so that the punch 16 can be detachably installed on the upper die base 11. The connection method of the upper die base 11, the upper pad, the punch fixing plate 12 and the punch 16 is protected but not limited to screw connection.

[0060] The punch 16 passes through the stripper plate 13 , and the stripper plate 13 can move along the punch 16 . Specifically, the stripper plate 13 can move along the extension direction of the punch 16 . The spring 14 is disposed between the stripper plate 13 and the upper die seat 11 to reset the stripper plate 13 .

[0061] During the process of punching the material strip 3 with the punch 16 and inserting the punch 16 into the lower die assembly 2, the stripper plate 13 moves along the punch 16 toward the upper die base 11 under the extrusion of the lower die assembly 2, and the spring 14 is squeezed during the movement of the stripper plate 13, so that the spring 14 is in a compressed state; after the stamping is completed, the upper die assembly 1 moves away from the lower die assembly 2. During this process, the stripper plate 13 gradually moves toward the lower die assembly 2 under the action of the spring 14 until the spring 14 returns to its initial state. At this time, the punch 16 is retracted into the stripper plate 13, and the punch 16 is separated from the material strip 3.

[0062] The number of the springs 14 includes, but is not limited to, four, and they are evenly arranged along the circumference of the punch 16 .

[0063] In some embodiments, the stripper plate 13 has a guide groove, and the punch 16 cooperates with the guide groove and can move along the guide groove. Fig.10 and Fig.12 As shown, the first ball-and-socket punch 161 of the punch 16 cooperates with the first guide groove 131 and can slide along the first guide groove 131 ; the second ball-and-socket punch 162 cooperates with the second guide groove 132 and can slide along the second guide groove 132 .

[0064] In the present application, by setting the guide groove to have the same shape as the punch, the stability of the mutual movement between the guide groove and the punch 16 can be improved.

[0065] Combination Figures 4 to 8 As shown, the lower die assembly 2 includes: a lower die base 21, a lower die groove 27 and a clamp.

[0066] The lower die base 21 is used for detachable connection with the machine tool, the lower die groove 27 is detachably mounted on the lower die base 21, and the lower die groove 27 has a first positioning groove 272 and a second positioning groove 274. The lower die base 21 is used to place the material strip 3. The clamp is installed on the side of the lower die groove 27 facing the upper die assembly 1.

[0067] The present application discloses a specific structure of a lower die assembly 2. In some embodiments, the lower die assembly 2 can be improved according to different needs. It should be noted that the clamp can clamp the material strip 3 at the positioning groove, and after the punch 16 is inserted into the positioning groove, the first ball socket and the second ball socket can be punched out on the material strip 3.

[0068] The clamp in the present application includes: an adjustment frame 22 , a clamping member 23 and a driving member 24 .

[0069] Among them, one side of the adjustment frame 22 has a mounting groove 221, and the lower die groove 27 is located in the space surrounded by the adjustment frame 22. The shape of the adjustment frame 22 includes but is not limited to a rectangular frame, and the side walls of the adjustment frame 22 and the lower die groove 27 are detachably connected to facilitate the replacement of the lower die groove 27. The lower die groove 27 is located in the space surrounded by the adjustment frame 22, and the height of the side wall of the adjustment frame 22 is greater than the height of the lower die groove 27. The height of the two side walls of the adjustment frame 22 is less than the height of the other two side walls, and one of the side walls with a higher height is provided with a mounting groove 221.

[0070] The clamping member 23 is disposed at the adjusting frame 22, and can be limited by the step structure formed by the side wall of the adjusting frame 22. Specifically, the clamping member 23 includes a guide plate 232 and a locking plate 231, wherein the guide plate 232 is detachably fixed in the side wall of the adjusting frame 22, and abuts against the side of the adjusting frame 22 away from the mounting groove 221. It can be understood that the guide plate 232 is limited at the step of the side wall of the adjusting frame 22, and abuts against the side away from the mounting groove 221.

[0071] One side of the locking plate 231 is located in the adjustment frame 22 and is opposite to the guide plate 232. A receiving groove for the material strip 3 is formed between the locking plate 231 and the guide plate 232. The other side of the locking plate 231 protrudes outward from the adjustment frame 22 through the mounting groove 221. One side of the locking plate 231 can abut against the guide plate 232, and the other side protrudes outward through the mounting groove 221, and the locking plate 231 can move in a direction relative to the guide plate 232. The driving member 24 is connected to the locking plate 231 and is used to drive the locking plate 231 and the guide plate 232 to clamp the material strip 3. A baffle 26 is provided on the side of the locking plate 231 away from the adjustment frame 22. The baffle 26 is detachably connected to the adjustment frame 22, and the baffle 26 and the mounting groove 221 form a closed through hole. The locking plate 231 is inserted into the through hole and moves along the through hole.

[0072] The locking plate 231 and the guide plate 232 in the present application are arranged opposite to each other, and a receiving groove extending along the length direction of the material strip 3 is formed between the two.

[0073] Based on the above, in some embodiments, one of the two sides of the locking plate 231 and the guide plate 232 that are close to each other has an avoidance groove, which is used to avoid the punch 16, and the other side is a plane. Figure 6 As shown, the locking plate 231 has a first avoidance groove 2313 and a second avoidance groove 2312 on one side close to the guide plate 232, wherein the first avoidance groove 2313 is used to be opposite to the first ball punch 161, and the second avoidance groove 2312 is used to be opposite to the second ball punch 162. During the punching process of the punch 16, the first ball punch 161 passes through the first avoidance groove 2313 and then is inserted into the first positioning groove 272, and the second ball punch 162 passes through the second avoidance groove 2312 and then is inserted into the second positioning groove 274. Both the first avoidance groove 2313 and the second avoidance groove 2312 are U-shaped grooves.

[0074] Figure 7 It is shown that one side of the guide plate 232 close to the locking plate 231 is a plane 2321, which is used to contact the material strip 3 to form the bottom surface of the ball socket of the retaining frame.

[0075] In order to ensure the accuracy of the stamping process of the punch 16, in some embodiments, one of the unloading plate 13 and the lower die groove 27 has a first guide column 15, and the other has a first guide sleeve 271 for positioning and cooperating with the first guide column 15, and the locking plate 231 and / or the guide plate 232 have a mounting hole for the first guide column 15 to pass through.

[0076] Exemplarily, a first guide column 15 is provided on the unloading plate 13, and a first guide sleeve 271 is fixed on the lower die groove 27. When the upper die assembly 1 moves toward the lower die assembly 2, the first guide column 15 is first inserted into the first guide column 15 to position the punch 16, ensuring that the punch 16 can be opposite to the material strip 3, and can ensure that the punch 16 can be inserted into the corresponding positioning groove through the avoidance groove.

[0077] In order to ensure that the first guide column 15 can be stably inserted into the first guide sleeve 271, the first mounting hole 2314 of the locking plate 231 and the second mounting hole 2322 on the guide plate 232 in the embodiment of the present application are waist-shaped holes extending along the moving direction of the locking plate 231.

[0078] In some embodiments, one of the upper die base 11 and the lower die base 21 is provided with a second guide post 25 , and the other is provided with a second guide sleeve 17 positioned with the second guide post 25 .

[0079] Exemplarily, a second guide column 25 is fixed on the lower mold base 21, and a second guide sleeve 17 is fixed on the upper mold base 11. The second guide column 25 is moved relative to the second guide sleeve 17 to position the movement of the upper mold base 11, thereby ensuring that the first guide column 15 can be inserted into the first guide sleeve 271 during the movement of the upper mold base 11.

[0080] In some embodiments, the lower die groove 27 has a positioning block 273 for positioning the material strip 3, and the positioning block 273 cooperates with the first ball socket and / or the second ball socket of the material strip 3 to limit the position. The locking plate 231 has a slot 2311 adapted to the positioning block 273. During the punching process of the material strip 3, the punch 16 can only punch out a ball socket of a preset length on the material strip 3. Therefore, the material strip 3 needs to be moved along the punching direction. After the movement, in order to ensure the distance between adjacent ball sockets, the positioning block 273 can be used to position the length direction of the material strip 3 to avoid displacement of the material strip 3 along the length direction, and to ensure that the spacing between the ball sockets in the length direction of the material strip 3 can meet the requirements.

[0081] In addition, the present application also discloses a processing device for a thin-walled bearing retainer, including the processing mold for the thin-walled bearing retainer disclosed in the above-mentioned embodiment. Therefore, the processing device for a thin-walled bearing retainer having the processing mold for the thin-walled bearing retainer also has all the above-mentioned technical effects, which will not be repeated here.

[0082] In addition, the present application also discloses a method for processing a thin-walled bearing retainer, using the processing mold disclosed in the above embodiment, comprising the following steps:

[0083] S1. Cut strips.

[0084] Cut long strips into strips of preset length.

[0085] S2. Punching.

[0086] The sheared material strip is conveyed to the processing mold, and the material strip is clamped by a clamp, the upper mold assembly is started, the upper mold assembly moves toward the lower mold assembly, the punch punches out the first ball socket and the second ball socket on the material strip, and the upper mold assembly moves away from the lower mold assembly.

[0087] S3, cut into strips.

[0088] Cut the punched material strips into preset lengths.

[0089] S4. Bending.

[0090] The material strips obtained by cutting are bent in sections using a pressing wheel.

[0091] S5. Welding.

[0092] The two ends of the bent material strip are welded together to obtain a circular ring retainer.

[0093] S6. Rub the weld.

[0094] The welding slag at the weld of the circular ring retainer after welding is leveled to reduce the welding slag generated at the weld after welding.

[0095] S7, rolling and rounding.

[0096] The circular ring retainer after rubbing the weld is rounded and then made round to obtain a finished retainer with roundness that meets the requirements.

[0097] The processing method of the thin-walled bearing retainer disclosed in the present application can use the processing mold disclosed in the above embodiment to punch out ball sockets of different sizes and shapes on the material strip. After the ball is installed, the ball can move and rotate in the ball socket, thereby solving the problem of sticking when the bearing is subjected to uneven force.

[0098] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0099] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A processing mold for a thin-walled bearing cage, characterized in that: include: An upper die assembly, wherein the upper die assembly has a punch for punching a material strip, the punch comprising a first ball socket punch and a second ball socket punch, the first ball socket punch being used to punch out a first ball socket on the material strip, the second ball socket punch being used to punch out a second ball socket on the material strip, the cross section of the first ball socket punch being a U-shaped surface, the cross section of the second ball socket punch comprising an arcuate surface and a guide surface connected to an opening of the arcuate surface, the width of the guide surface gradually increasing from the opening of the arcuate surface toward a direction away from the opening of the arcuate surface, and the width of the first ball socket punch being greater than the width of the arcuate surface of the second ball socket punch; The lower die assembly has a first positioning groove corresponding to the first ball and socket punch and a second positioning groove corresponding to the second ball and socket punch.

2. The processing mold according to claim 1, characterized in that: The upper mold assembly comprises: An upper die base, the upper die base is used to be connected to a machine tool, and the punch is detachably connected to the upper die base; a stripper plate, through which the punch passes, and along which the stripper plate is movable; A spring is arranged between the stripper plate and the upper die seat and is used for resetting the stripper plate.

3. The processing mold according to claim 2, characterized in that: The stripping plate has a guide groove, and the punch cooperates with the guide groove and can move along the guide groove.

4. The processing mold according to claim 2, characterized in that: The lower mold assembly comprises: A lower die base, the lower die base being used for connecting with a machine tool; A lower die groove, wherein the lower die groove is detachably mounted on the lower die base, and the lower die groove has the first positioning groove and the second positioning groove; The clamp is installed on a side of the lower die groove facing the upper die assembly.

5. The processing mold according to claim 4, characterized in that: The fixture comprises: An adjusting frame, wherein one side of the adjusting frame has a mounting groove, and the lower mold groove is located in a space enclosed by the adjusting frame; A guide plate, the guide plate is detachably fixed to the side wall of the adjustment frame and abuts against a side of the adjustment frame away from the mounting groove; A locking plate, one side of which is located in the adjusting frame and opposite to the guide plate, a accommodating groove for the material strip is formed between the locking plate and the guide plate; the other side extends out of the adjusting frame through the mounting groove, one of the two side surfaces of the locking plate and the guide plate close to each other has an avoidance groove, the avoidance groove is used to avoid the punch, and the other is a plane; A driving member is connected to the locking plate and is used to drive the locking plate and the guide plate to clamp the material strip.

6. The processing mold according to claim 5, characterized in that: One of the stripper plate and the lower die groove has a first guide column, and the other has a first guide sleeve for positioning and cooperating with the first guide column, and the locking plate and / or the guide plate has a mounting hole for the first guide column to pass through; and / or, One of the upper die base and the lower die base is provided with a second guide column, and the other is provided with a second guide sleeve positioned with the second guide column.

7. The processing mold according to claim 6, characterized in that: The mounting hole is a waist-shaped hole extending along the moving direction of the locking plate.

8. The processing mold according to claim 4, characterized in that: The lower die groove has a positioning block for positioning the material strip, and the positioning block cooperates with the first ball socket and / or the second ball socket of the material strip to limit the position.

9. A processing device for a thin-walled bearing retainer, characterized in that: Comprising the processing mold as described in any one of claims 1 to 8.

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