A bearing cage press slope mold

Abstract

The utility model relates to bearing retainer press slope machining technical field, especially a kind of bearing retainer press slope mould, lower mould top is equipped with female die, female die edge position is equipped with several guide holes, central position is equipped with the recess for accommodating bearing retainer, recess circumferentially extends out for each group of press slope male die press slope male die movable slot;Upper mould upper cylinder inside top position is equipped with mandrel backing plate, upper cylinder bottom is equipped with press slope guide frame, mandrel backing plate bottom is equipped with mandrel, its circumferential side is uniformly distributed multiple press slope male dies, press slope male die top end is connected with male die guide frame to realize that press slope male die can be radially expanded, and male die guide frame and mandrel backing plate between are equipped with elastic member;Mandrel backing plate is fixed with several inner guide posts upper end, and inner guide post lower end is used to cooperate with guide hole;It can realize one-time to all window hole beam of entire retainer press slope, simultaneously, when upper mould is pressed down, the inner guide post of upper mould cooperates with the guide hole of lower mould, so that upper mould and lower mould always remain on same axis, guarantee press slope quality.

Description

Technical Field

[0001] This utility model relates to the field of bearing cage beveling technology, and in particular to a bearing cage beveling mold. Background Technology

[0002] The bearing cage is an indispensable component of a bearing. Its function is to evenly separate the rolling elements, preventing them from contacting and colliding with each other, thereby ensuring the normal operation and performance of the bearing. In the manufacturing process of the bearing cage, the beveling process is a crucial step. Its function is to bevel the inner side of the perforated beam formed after punching. The quality of the beveling directly affects the performance and service life of the cage.

[0003] The invention patent with publication number CN114210869A discloses a method and apparatus for producing stamped cages of angular contact bearings. The pressing method involves feeding the cage into a spring collet via a feeding mechanism, and a servo motor driving the die frame forward to deliver the cage between the punching punch and the punching die. The machine tool slide moves downward, and the punching punch and the punching die close together to achieve punching and pressing. However, this pressing method requires the punching punch and the punching die to close multiple times to complete the pressing work of a set of cages, and it is impossible to complete the pressing work of the entire cage in one stamping.

[0004] The invention patent with publication number CN118218915A discloses a processing method and equipment for a conical cage. The sloping mold of this solution includes a punch and a pressing mold, which can realize the one-time sloping work of the cage. However, it lacks a guiding structure, which easily leads to inaccurate sloping, resulting in indentations at the window beam or the end ring of the cage, and a high defect rate. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a bearing cage sloping mold. The sloping punch is arranged in a ring around the mandrel, which can realize the sloping work of all window beams of the entire cage in one go. At the same time, when the upper mold is pressed down, the inner guide post of the upper mold cooperates with the guide hole of the lower mold, so that the upper mold and the lower mold always keep on the same axis, achieving precise sloping and ensuring the quality of sloping.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0007] A bearing cage pressing die, comprising:

[0008] The lower die has a concave die at its top, several guide holes at the edge of the concave die, and a groove at the center to accommodate the bearing retainer. The groove extends outward in the circumferential direction to form a punch movable groove for each set of pressing punches to press the slope.

[0009] The upper mold includes an upper cylinder. A mandrel pad is provided at the top of the inner side of the upper cylinder. A pressure guide frame is provided at the bottom of the upper cylinder. A mandrel is provided at the bottom of the mandrel pad. The lower end of the mandrel is inverted conical. Multiple sets of pressure punches are evenly distributed around its perimeter. The top of the pressure punch is connected to the punch guide frame to enable the pressure punch to expand radially. An elastic element is provided between the punch guide frame and the mandrel pad. The upper ends of several inner guide pillars are fixed on the mandrel pad. The lower ends of the inner guide pillars are used to cooperate with guide holes. The lower ends of the mandrel and the pressure punch pass through the pressure guide frame. The upper mold presses down to enable the mandrel and the pressure punch to slide relative to each other to expand the pressure punch.

[0010] As a further implementation, the lower mold includes a lower mold base, the top of which is fixed with a lower template, and a cavity mold pad and a cavity mold are arranged sequentially above the lower template mold; the guide holes are evenly distributed around the periphery of the cavity mold.

[0011] As a further implementation, a first circular opening is provided on the die plate and a second circular opening is provided on the lower die plate. The outer diameter of the second circular opening is smaller than the outer diameter of the first circular opening. A ejector core is installed through the circular opening. The top of the ejector core extends to the groove position of the die and is adapted to the inner diameter of the lower part of the groove.

[0012] As a further implementation, the top of the ejector core is provided with a magnet mounting groove for supporting and magnetically fixing the bottom surface of the retainer workpiece. The outer diameter of the top of the ejector core is adapted to the outer diameter of the bottom surface of the retainer workpiece. The lower die base is provided with a telescopic component. The output end of the telescopic component extends to the first circular opening and connects to the ejector core. The ejector core lifts the retainer workpiece after it has been pressed up to the top surface of the die cavity.

[0013] As a further implementation, the upper mold includes an upper mold base, the bottom of which is connected to the upper cylinder and the mandrel pad through an upper template. The inner guide pillars are vertically arranged and evenly distributed around the mandrel. The lower end of the inner guide pillars passes through the slope guide frame and is coaxially arranged with the guide hole.

[0014] As a further implementation, the punch guide frame is slidably sleeved on the mandrel, and its interior is provided with an annular expansion channel for the top of the pressure punch to expand; the cross-section of the expansion channel is inclined relative to the axis of the mandrel.

[0015] As a further implementation, the top of one side of the slope-pressing punch is provided with a first groove and the bottom is provided with a second groove. The upper part of the first groove forms a sliding part for sliding cooperation with the expansion channel; the lower part of the second groove forms a slope-pressing part with a slope-pressing surface for pressing the window beam.

[0016] As a further implementation, the side of the pressing punch away from the slot is used for sliding engagement with the inverted conical outer surface of the mandrel; the inner center of the pressing guide frame has an opening that extends outward in the circumferential direction to form multiple sets of punch guide grooves for sliding of the pressing punch, and the side of the pressing punch between the first slot and the second slot is used for sliding engagement with the inner surface of the punch guide groove, and the inner surface of the punch guide groove is inclined relative to the mandrel axis.

[0017] As a further implementation, the bottom end of the punch guide frame is provided with a vertical positioning post. The lower end of the positioning post extends through the pressure guide frame and down to the bottom of the pressure guide frame. When the upper die presses downward and the positioning post abuts against the top surface of the die, the mandrel expands the pressure punch.

[0018] As a further implementation, the groove extends through the die cavity, and a stop is formed between the adjacent movable slots of the punches. The upper section of the inner side of the stop is inclined, and the inclination is adapted to the inclination of the outer side of the retainer workpiece to abut against the retainer. The lower section is vertically arranged for sliding cooperation with the ejector core.

[0019] The beneficial effects of this utility model are as follows:

[0020] 1. The pressing punch of this utility model is ring-shaped and arranged around the mandrel, which can realize the pressing work of all window beams of the entire retainer in one go. At the same time, when the upper die is pressed down, the inner guide post of the upper die cooperates with the guide hole of the lower die, so that the upper die and the lower die always keep on the same axis, realizing precise pressing and ensuring the pressing quality.

[0021] 2. The positioning column of this utility model can be set so that after the pressure part enters the cage, the pressure punch is expanded by the mandrel to pressure it. When the upper die rises, the pressure punch can be tightened back towards the mandrel axis under the action of the spring, so as to ensure that the pressure punch can be smoothly withdrawn from the workpiece.

[0022] 3. The ejector core of this utility model is equipped with a magnet at its top, which can fix the workpiece and ensure the quality of the beveling. The upper part of the die at the top of the workpiece after beveling can be moved by a cylinder. 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 view of the bearing cage pressing mold in this embodiment of the present invention;

[0025] Figure 2 This is a cross-sectional view of the bearing cage pressing mold in this embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of the slope-pressing tray in an embodiment of this utility model;

[0027] Figure 4 This is a schematic diagram of the slope-pressing plate in an embodiment of this utility model;

[0028] Figure 5 This is a schematic diagram of the slope guide frame in an embodiment of this utility model;

[0029] Figure 6 This is a schematic diagram of the structure of the concave mold in an embodiment of this utility model;

[0030] Figure 7 This is a schematic diagram of the structure of the pressure punch in an embodiment of this utility model;

[0031] Figure 8 This is a schematic diagram showing the positional relationship between the pressure punch and the punch movable groove in an embodiment of this utility model.

[0032] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0033] The components are: 1. Sloping punch, 11. Upper die base, 12. Upper template, 13. Upper cylinder, 14. Sloping guide frame, 15. Mandrel pad, 16. Mandrel, 17. Inner guide post, 18. Sloping tray, 19. Sloping pull plate; 111. Spring, 112. Positioning post; 141. Punch guide groove, 181. Lower slope surface, 191. Upper slope surface; 21. Lower die base, 22. Lower template, 23. Die pad, 24. Die, 241. Punch movable groove, 242. Stop block; 25. Unloading core, 251. Groove, 252. Through hole, 253. Magnet mounting groove; 101. Sliding part, 102. Outer guide surface, 103. First slot, 104. Second slot, 105. Sloping surface, 106. Inner guide surface. Detailed Implementation

[0034] 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.

[0035] Example 1

[0036] In a typical embodiment of this utility model, refer to Figures 1-8 As shown, a bearing cage beveling die includes a lower die and an upper die. The lower die is provided with a concave die, and the upper die is provided with a mandrel 16 and a beveling punch 1. The upper die presses downward, and the lower end of the beveling punch 1 extends into the cage workpiece. The mandrel 16 expands the beveling punch 1, so that the beveling punch 1 beveles the window beam of the cage in one go.

[0037] The lower die has a cavity 24 at the top, and several guide holes are provided at the edge of the cavity 24. A groove for accommodating the bearing retainer is provided at the center. The groove extends outward in the circumferential direction to provide a punch movable groove for each set of pressing punches to press the slope.

[0038] like Figure 1 As shown, the lower mold structure includes a lower mold base 21, a lower template 22, a die backing plate 23, a die 24, and a ejector core 25.

[0039] The lower mold base 21 is fixed to the top of the lower template 22, the lower template 22 is fixed to the top of the die pad 23, and the die pad 23 is fixed to the top of the die 24.

[0040] Multiple sets of guide holes are evenly distributed along the reversing direction near the edge of the concave die 24, which are inserted into the inner guide post of the upper die when it is pressed down, so as to achieve the function of guiding and positioning and ensure the accuracy of the slope pressing.

[0041] The guide hole is located on the periphery of the groove in the die cavity, such as... Figure 6 As shown, three sets of guide holes can be provided around the die cavity, spaced 120° apart. A groove extends through the die cavity. Since the groove extends outwards circumferentially to create movable slots for each set of sloping punches, the number of movable slots 241 is the same as the number of sloping punches. When the sloping portion at the lower end of the sloping punch 1 expands outwards to slop the window beam, the sloping portion can move into the movable slot 241 to facilitate smooth sloping. The movable slot 241 has a semi-circular cross-section, achieved by extending outwards circumferentially from the circular groove at the center of the die cavity.

[0042] like Figure 6 and Figure 8 As shown, a stop 242 is formed between adjacent punch movable slots 241. The upper section of the inner surface of each set of stop blocks 242 is inclined, with the inclination matching the inclination of the outer surface of the retainer workpiece to abut against the retainer. The lower section of the inner surface is vertically arranged for sliding engagement with the outer surface of the ejector core. Therefore, the inscribed circle radius of the lower section of the inner surface of multiple sets of stop blocks matches the upper outer diameter of the ejector core. Figure 1 As shown.

[0043] Understandably, the upper rear end of the baffle is adapted to the thickness of the window opening beam, and the inner side is used to hold the window opening beam in place.

[0044] In this example, a first circular opening is provided on the die plate 23, and a second circular opening is provided on the lower die plate 22. The outer diameter of the second circular opening is smaller than the outer diameter of the first circular opening, and the ejector core is installed through the circular opening.

[0045] The upper and lower sections of the ejector core 25 are both cylindrical. The outer diameter of the upper cylindrical section matches the inner diameter of the first circular opening and also matches the inner diameter of the inner side of the lower section of the baffle. The lower cylindrical section matches the inner diameter of the second circular opening.

[0046] When the ejector core 25 is not extended, the bottom surface of the upper cylindrical section is in contact with the top surface of the lower template 22. The top surface of the upper cylindrical section is at the same height as the bottom end of the upper inclined surface inside the baffle, and a cavity supporting the workpiece is formed between the top surface of the upper cylindrical section and the upper inclined surface inside the baffle.

[0047] Furthermore, the top of the ejector core is provided with a magnet mounting groove 253 for mounting a magnet. The top of the ejector core is used to support and magnetically fix the bottom surface of the retainer workpiece, thereby fixing the retainer and ensuring the stability of the slope pressing operation. The outer diameter of the top of the ejector core is adapted to the outer diameter of the bottom surface of the retainer workpiece. A groove 251 is also provided in the middle of the top of the ejector core, and a through hole 252 is provided in the lower cylindrical section of the ejector core.

[0048] The lower mold base is equipped with a telescopic component. The output end of the telescopic component extends upward to the first circular opening of the lower mold plate 22 and connects to the lower end of the ejector core. The telescopic component is a cylinder. The output end of the cylinder lifts the retainer workpiece after the slope is pressed to the top surface of the die through the ejector core. At this time, the top surface of the ejector core is flush with the top surface of the die.

[0049] like Figure 1 As shown, the upper mold includes an upper mold base 11, with an upper template 12 fixed to the bottom of the upper mold base 11. An upper cylinder 13 and a mandrel pad 15 are fixed to the bottom of the upper template 12. The upper cylinder 13 is a cylindrical structure, and the mandrel pad 15 is located at the top of the inner side of the upper cylinder 13. A slope guide 14 is provided at the bottom opening of the upper cylinder 13.

[0050] like Figure 1 As shown, a mandrel 16 is vertically positioned at the center of the bottom of the mandrel pad inside the upper cylinder 13. The mandrel 16 is a solid structure, with its lower end in an inverted cone shape, specifically an inverted frustum. The mandrel consists of two sections from top to bottom: the upper section is cylindrical, and the lower section is frustum-shaped.

[0051] like Figure 1 As shown, a punch guide frame is provided on the inner side of the upper cylinder 13. The punch guide frame is sleeved at the position of the cylindrical structure on the upper section of the mandrel and can slide up and down along the mandrel.

[0052] The punch guide frame includes a slope tray 18, and a slope pull plate 19 is connected to the lower part of the slope tray 18.

[0053] Multiple sets of pressure punches are evenly distributed around the mandrel. The top of the pressure punch is connected to the punch guide frame to enable the pressure punch to expand radially. An elastic element, which is a spring 111, is provided between the pressure tray 18 and the mandrel pad. When the punch guide frame is close to the mandrel pad, the spring 111 can be compressed.

[0054] like Figure 1As shown, the upper ends of several vertical inner guide pillars 17 are fixed on the mandrel pad, and the lower ends of the inner guide pillars 17 are used to mate with guide holes. Three sets of inner guide pillars are also provided. The inner guide pillars are located around the mandrel, and they pass downwards sequentially through the pressure plate 18, the pressure pull plate 19, and the pressure guide frame 14, extending below the pressure guide frame 14. When the upper die presses down, the inner guide pillars 17 can enter the guide holes, achieving positioning of the workpiece during stamping by the upper and lower dies.

[0055] The mandrel and the lower end of the pressure punch pass through the pressure guide frame, and the upper die presses down to achieve relative sliding between the mandrel and the pressure punch to expand the pressure punch.

[0056] The punch guide frame has an annular expansion channel inside for the expansion of the top of the pressure-slope punch; the cross-section of the expansion channel is inclined relative to the mandrel axis. The upper end of the expansion channel is connected to the mandrel, the lower end is lower than the upper end, and the outer diameter of the lower end is larger than the outer diameter of the upper end.

[0057] like Figure 7 As shown, the beveling punch 1 has a first groove near the top on one side (outer side) and a second groove near the bottom. Both the first groove 103 and the second groove 104 are U-shaped. The first groove allows the beveling punch 1 to form a sliding part 101 on its upper part. The sliding part 101 is a block-shaped structure, extending parallel to the length of the top surface of the beveling punch 1 and perpendicular to the truncated cone section of the lower section of the mandrel. The sliding part 101 slidably engages in the expansion channel.

[0058] like Figure 3 and Figure 4 As shown, the pressure tray 18 and the pressure plate 19 are ring structures with a circular opening in the center for connecting with the mandrel. The bottom surface of the pressure tray 18 and the top surface of the pressure plate 19 near the edge are provided with a ring plane. The pressure tray 18 and the pressure plate 19 are connected into a punch guide frame by setting mounting holes at the position of the ring plane.

[0059] In the bottom surface of the slope tray 18, the inner part of the annular plane is set as a lower slope surface 181, and the corresponding position on the top of the slope pull plate 19 is set as an upper slope surface 191. After the slope tray 18 and the slope pull plate 19 are installed, the space between the lower slope surface 191 and the upper slope surface 181 forms an expansion channel for cooperation with the sliding part. The lower part of the second slot 104 on the outer side of the slope punch 1 forms a slope part, and the slope part has slope surfaces 105 on both sides for sloping the window beam.

[0060] The pressing punch 1 has an inner guide surface 106 on the side away from the slot, which is used for sliding engagement with the inverted conical outer surface of the mandrel, such as... Figure 1 As shown.

[0061] During stamping, the pressure bend enters the workpiece and uses the pressure bends on both sides to press the window beam. It can be understood that the thickness of the pressure bend punch 1 is adapted to the distance between two adjacent window beams, so that the two pressure bends 105 on one pressure bend punch 1 can press the adjacent window beams on their close sides.

[0062] like Figure 5 As shown, the slope guide frame 14 has a central opening for the lower end of the mandrel 16 and the slope punch 1 to pass through. The opening of the slope guide frame 14 extends outward in the circumferential direction to form multiple sets of punch guide grooves 141 for the slope punch to slide. The inner side of the punch guide groove is inclined relative to the mandrel axis, as shown. Figure 1 As shown.

[0063] The side surface between the first groove 103 and the second groove 104 on the outer side of the beveling punch 1 is an outer guide surface 102, which is used to slide with the inner side surface of the punch guide groove 141. The portion between the first groove 103 and the second groove 104 on the outer side of the beveling punch 1 is located between the beveling pull plate 19 and the die 24.

[0064] like Figure 2 As shown, the bottom end of the slope-pressing plate 19 is provided with a vertical positioning post 112. The lower end of the positioning post 112 extends through the slope-pressing guide frame 14 and below the slope-pressing guide frame 14. When the upper die presses downward, and the lower end of the positioning post 112 abuts against the top surface of the die 24, the mandrel expands the slope-pressing punch. Figure 1 and Figure 2 As shown.

[0065] Specifically, the upper die descends, and the lower end of the beveling punch 1 can directly enter the retainer in the die cavity. Then, the lower end of the positioning pin 112 abuts against the top surface of the die cavity 24. After that, the upper die continues to descend, the punch guide frame does not descend, and the spring 111 begins to be compressed, so that the mandrel moves downward relative to the beveling punch 1, allowing the beveling punch 1 to expand outward along the expansion channel. The beveling work is achieved by the expansion of the beveling punch 1 by the mandrel.

[0066] After the beveling is completed, the upper die rises, and the spring 111 releases its elastic force, causing the mandrel to move upward relative to the beveling punch 1. The lower end of the beveling punch 1 contracts, allowing the entire upper die to leave the workpiece. Then, the cylinder in the lower die holder 21 pushes the ejector core to push the workpiece out of the die cavity.

[0067] In this embodiment, the slope-pressing punch is arranged in a ring around the mandrel, which can realize the slope-pressing work of all window beams of the entire retainer in one go. At the same time, when the upper die presses down, the inner guide post of the upper die cooperates with the guide hole of the lower die, so that the upper die and the lower die always keep on the same axis, achieving precise slope pressing and ensuring slope pressing quality.

[0068] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A bearing cage pressing mold, characterized in that, include: The lower die has a concave die at its top, several guide holes at the edge of the concave die, and a groove at the center to accommodate the bearing retainer. The groove extends outward in the circumferential direction to form a punch movable groove for each set of pressing punches to press the slope. The upper mold includes an upper cylinder. A mandrel pad is provided at the top of the inner side of the upper cylinder. A pressure guide frame is provided at the bottom of the upper cylinder. A mandrel is provided at the bottom of the mandrel pad. The lower end of the mandrel is inverted conical. Multiple sets of pressure punches are evenly distributed around its perimeter. The top of the pressure punch is connected to the punch guide frame to enable the pressure punch to expand radially. An elastic element is provided between the punch guide frame and the mandrel pad. The upper ends of several inner guide pillars are fixed on the mandrel pad. The lower ends of the inner guide pillars are used to cooperate with guide holes. The lower ends of the mandrel and the pressure punch pass through the pressure guide frame. The upper mold presses down to enable the mandrel and the pressure punch to slide relative to each other to expand the pressure punch.

2. The bearing cage pressing mold according to claim 1, characterized in that, The lower mold includes a lower mold base, the top of which is fixed with a lower template, and a cavity mold pad and a cavity mold are arranged sequentially above the lower template mold; the guide holes are evenly distributed around the periphery of the cavity mold.

3. The bearing cage pressing mold according to claim 2, characterized in that, The die plate is provided with a first circular opening, and the lower die plate is provided with a second circular opening. The outer diameter of the second circular opening is smaller than that of the first circular opening. The ejector core is installed through the circular opening. The top of the ejector core extends to the groove position of the die and is adapted to the inner diameter of the lower part of the groove.

4. The bearing cage pressing mold according to claim 3, characterized in that, The top of the ejector core is provided with a magnet mounting groove for supporting and magnetically fixing the bottom surface of the retainer workpiece. The outer diameter of the top of the ejector core is adapted to the outer diameter of the bottom surface of the retainer workpiece. The lower die base is provided with a telescopic component. The output end of the telescopic component extends to the first circular opening and connects to the ejector core. The ejector core lifts the retainer workpiece after it has been pressed up to the top surface of the die cavity.

5. A bearing cage beveling mold according to claim 1, characterized in that, The upper mold includes an upper mold base, the bottom of which is connected to the upper cylinder and the mandrel pad through an upper template. The inner guide pillars are vertically arranged and evenly distributed around the mandrel. The lower end of the inner guide pillars passes through the slope guide frame and is coaxially arranged with the guide hole.

6. A bearing cage beveling mold according to claim 5, characterized in that, The punch guide frame is slidably sleeved on the mandrel, and its interior is provided with an annular expansion channel for the top of the pressure punch to expand; the cross section of the expansion channel is inclined relative to the axis of the mandrel.

7. A bearing cage beveling mold according to claim 6, characterized in that, The top of one side of the slope-pressing punch is provided with a first groove and the bottom is provided with a second groove. The upper part of the first groove forms a sliding part for sliding cooperation with the expansion channel; the lower part of the second groove forms a slope-pressing part with a slope-pressing surface for pressing the window beam.

8. A bearing cage beveling mold according to claim 7, characterized in that, The side of the pressure punch away from the slot is used for sliding engagement with the inverted conical outer surface of the mandrel; the inner center of the pressure punch guide has an opening that extends outward in the circumferential direction to form multiple sets of punch guide grooves for sliding of the pressure punch; the side of the pressure punch between the first slot and the second slot is used for sliding engagement with the inner surface of the punch guide groove; the inner surface of the punch guide groove is inclined relative to the mandrel axis.

9. A bearing cage beveling mold according to claim 6, characterized in that, The bottom end of the punch guide frame is provided with a vertical positioning post. The lower end of the positioning post extends through the slope guide frame and down to the bottom of the slope guide frame. When the upper die presses downward and the positioning post abuts against the top surface of the die, the mandrel expands the slope punch.

10. A bearing cage beveling mold according to claim 3, characterized in that, The groove extends through the die cavity, and a stop is formed between the adjacent movable slots of the punches. The upper section of the inner side of the stop is inclined, and the inclination matches the inclination of the outer side of the retainer workpiece to abut against the retainer. The lower section is vertically arranged for sliding cooperation with the ejector core.

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