A kind of tapered roller bearing cage cutting slope die and process

Abstract

The application discloses a pitch roller bearing retainer chamfering die and process, which is characterized by the following: a chamfering bottom die with an arc concave surface is arranged, the arc of the arc concave surface is matched with the arc of a pitch roller retainer to be machined, the retainer is placed on the arc concave surface and is in close contact with the chamfering bottom die, the arc concave surface is provided with a chamfering through hole, a chamfering punch can be inserted into the chamfering through hole and is in close contact with the chamfering through hole, the chamfering punch directly punches the window beam of the retainer, removes part of the material of the window beam and forms a slope, the original machining requirement is met, the flow of the material in the window beam during machining of a groove is reduced, the deformation of the window beam is avoided, meanwhile, the chamfering can remove the excess material on the retainer, the weight of the retainer is reduced, and the performance of the retainer is more stable.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of self-aligning roller bearing cage, and particularly relates to a self-aligning roller bearing cage chamfering die and process. BACKGROUND

[0002] The bearing cage has the function of separating and fixing the rollers, preventing the contact between the rollers, providing a lubrication space, and guiding the rolling of the rollers to minimize friction and heat generation. The bearing cage has a plurality of equidistant window holes for separating and guiding the rollers. The connecting part between the window holes is called a window beam, which has the functions of connection and strength increase. The straight angle formed by the inner side and the side of the punched window hole is not conducive to the fixation and rolling of the rollers. The pressing slope process is to punch a slope surface from the straight angle formed by the inner side and the side of the window hole by using a pressing slope die. The slope surface is basically consistent with the surface of the roller to reduce the friction between the window hole and the roller, improve the strength of the bearing cage, improve the contact performance with the rolling body, and strengthen the flexibility of the bearing operation, thereby prolonging the service life of the bearing and improving the quality of the bearing.

[0003] The production process of the self-aligning roller bearing cage is roughly blanking, punching window holes, punching beam slope, and shaping. In the prior art, the window beam is pressed by a stamping die to make the window beam present a concave shape. The bearing cage produced by this processing method often has deformation of the window beam due to local stamping. The stretching flow of the material inside the window beam during stamping also leads to a decrease in the surface precision of the window beam, greatly affecting the subsequent processing flow and reducing the production qualification rate of the product. Therefore, the prior art needs to be further improved and enhanced. SUMMARY

[0004] The application provides a self-aligning roller bearing cage chamfering die and process to solve at least one of the above technical problems. The chamfering die is provided with an arc-shaped concave chamfering bottom die, the arc of the arc-shaped concave surface is matched with the arc of the self-aligning roller cage to be processed, the chamfering bottom die is matched with the chamfering bottom die, the chamfering protruding die can be inserted into the chamfering through hole and tightly matched with the chamfering through hole, the chamfering protruding die directly punches the window beam of the bearing cage, removes part of the material of the window beam, forms a slope, meets the original processing requirements, reduces the flow of the material inside the window beam during processing of the groove, avoids the deformation of the window beam, removes the excess material on the bearing cage, reduces the weight of the bearing cage, and makes the performance of the bearing cage more stable.

[0005] To achieve the above-mentioned purpose, the application provides a self-aligning roller bearing cage chamfering die, which comprises:

[0006] The chamfering die comprises a chamfering bottom die and a chamfering protruding die.

[0007] The chamfering bottom die is provided with an arc-shaped concave surface, the arc of the arc-shaped concave surface is matched with the arc of the retainer, the arc-shaped concave surface is provided with a chamfering through hole, and the chamfering punch can be inserted into the chamfering through hole and tightly fit with the chamfering through hole.

[0008] The retainer is fixed to the chamfering bottom die by the pressing mechanism and tightly fit with the arc-shaped concave surface, and the chamfering punch vertically moves downward to cut off the overlapping part of the vertical ground projection of the window beam and the vertical ground projection of the chamfering through hole, to form the slope surface from the window beam towards the bearing outer ring to the bearing inner ring.

[0009] The mechanism is provided with the chamfering bottom die with the arc-shaped concave surface, the arc of the arc-shaped concave surface is matched with the arc of the retainer to be machined, the retainer is placed to the arc-shaped concave surface to tightly fit with the chamfering bottom die, so that the deformation of the retainer of the self-aligning roller bearing with the large and small end faces is avoided, the arc-shaped concave surface is provided with the chamfering through hole, the window beam vertically projects to the ground and the vertical ground projection of the chamfering through hole overlaps, the chamfering punch can be inserted into the chamfering through hole and tightly fit with the chamfering through hole, the chamfering punch vertically moves downward to directly punch the overlapping part of the window beam of the retainer and the vertical ground projection of the chamfering through hole, to cut off part of the material of the window beam, to form the slope surface from the window beam towards the bearing outer ring to the bearing inner ring, to not only meet the original machining requirements but also reduce the flow of the internal material of the window beam when the groove is machined, to avoid the deformation of the window beam, meanwhile, the chamfering can remove the excess material on the retainer, to reduce the weight of the retainer, to make the performance of the retainer more stable.

[0010] In the preferred implementation, the arc-shaped concave surface is provided with two chamfering through holes, and the chamfering through holes are symmetrically arranged with the bisector of the arc-shaped concave surface as the middle line.

[0011] The two chamfering through holes are arranged, and the chamfering punch can chamfer the two window beams of the retainer when vertically downwardly entering the chamfering through hole, so as to improve the chamfering efficiency and the production of the product.

[0012] In the preferred implementation, the middle line of any window of the retainer is opposite to the bisector of the arc-shaped surface, the two chamfering through holes are located in the two adjacent windows, and the chamfering punch vertically moves downward to chamfer the two window beams.

[0013] Specifically, the line of each window hole of the initial position holder is coincident with the bisector of the arc surface, and the two adjacent window holes on both sides of each window hole are respectively opposite to the two slope through holes to ensure the blanking angle. At this time, the window beam of the two window holes away from the bisector of the arc surface and the corresponding slope through hole have a coincident part in the projection direction perpendicular to the ground. The two slope punches move downward to punch the coincident part into the slope through hole to realize the slope cutting operation of the two window beams. At this time, the cut slope surfaces of the two window beams are opposite to each other, the single slope cutting is completed, and the structure design is more reasonable.

[0014] In the preferred implementation, the pressing mechanism includes a pressing fixed block, the pressing fixed block has an arc surface, the curvature of the arc surface is matched with the curvature of the surface of the holder facing the bearing inner ring, and when the slope bottom die is pressed, the pressing fixed block presses the two side window hole positions of the two window beam to be processed, so that the holder is tightly attached between the arc concave surface and the pressing fixed block to fix the holder.

[0015] The arc pressing fixed block is arranged to fix the holder, so that the holder is fixed stably and convenient for slope cutting. The curvature of the arc pressing part is designed to be matched with the curvature of the surface of the holder facing the bearing inner ring, and the arc concave surface is designed to be matched with the curvature of the surface of the holder facing the bearing outer ring. The holder is attached between the arc surface and the arc pressing part, thereby preventing the holder from being extruded and deformed, and ensuring the product quality of the holder.

[0016] In the preferred implementation, the slope die further includes an upper connecting plate and a lower connecting plate, the upper connecting plate and the lower connecting plate are connected to the punch, and the upper connecting plate and the lower connecting plate are connected through an elastic expansion column. The upper connecting plate is sequentially connected with the upper die plate, the holder plate, the upper positioning plate and the slope punch from top to bottom. The slope bottom die is fixed to the lower connecting plate through the lower die seat. The pressing fixed block is arranged below the holder plate and located on both sides of the upper positioning plate. The spring is arranged between the pressing fixed block and the holder plate.

[0017] The upper connecting plate and the lower connecting plate are connected to the punch. When the upper connecting plate is pressed, the upper die plate, the holder plate, the upper positioning plate and the slope punch are driven. The pressing fixed block is pressed on the two side holder bodies of the two window beam to be processed to fix the position of the holder. The holder is fixed by using the elastic compression force, so that the stress on the holder is more moderate and the contact is non-rigid. The deformation of the holder is prevented to improve the production qualification rate of the holder. The slope punch enters the slope through hole to punch and complete the single slope cutting operation. The structure design is more reasonable.

[0018] In the preferred implementation, the pressing fixed block is provided with a matching groove, and the slope punch is arranged in the matching groove and can move relative to the pressing fixed block.

[0019] The matching groove of the pressing fixed block and the slope cutting punch are matched with each other, so that the movement and positioning of the pressing fixed block are realized, the pressing fixed block is pressed on the two side cage bodies of the two cage window beams first contacted, so as to fix the position of the cage, then the slope cutting punch enters the slope cutting hole, after the slope cutting is completed, under the elastic force of the spring, the pressing fixed block moves to the end of the slope cutting punch, the waste of the window beam possibly adhered to the end of the slope cutting punch is removed, so as to facilitate the next slope cutting and improve the production qualified rate of products.

[0020] In the preferred implementation, the cage plate rear side is provided with a punch guide rail perpendicular to the ground, so as to ensure that the action path of the slope cutting punch is accurate.

[0021] The punch guide rail can ensure the accuracy of the vertical extension of the slope cutting punch into the slope cutting hole, and improve the product qualified rate.

[0022] In the preferred implementation, the slope cutting bottom die is detachably connected with the lower die seat, and the lower die seat is provided with a positioning hole for positioning the lower die seat and the slope cutting die.

[0023] The slope cutting bottom die and the lower die seat are detachable, so that different slope cutting bottom dies with different arc concave surfaces can be replaced to correspond to different sizes of the self-aligning roller bearing cage, so as to expand the compatibility of the slope cutting equipment for different types and models of cages.

[0024] In the preferred implementation, the feeding device is further included, which is used for placing the cage to be processed above the slope cutting bottom die and making the cage fit the arc concave surface, after the single slope cutting is completed, the feeding device can be rotated to drive the cage to rotate, so that the window beams at different positions of the cage are subjected to the slope cutting operation.

[0025] The feeding device is used for placing the cage to be processed above the slope cutting bottom die, and is placed in the initial position, that is, the center line of any window hole of the cage corresponds to the bisector of the arc concave surface, and the adjacent two window holes on both sides correspond to the two slope cutting holes respectively, after the single slope cutting is completed, the feeding device is rotated, the rotation angle can be controlled according to the interval arc radian of the adjacent window hole center lines arranged on the cage, so that the slope cutting operation on the other window beams of the cage is realized, the slope cutting precision and efficiency of the window beams are improved, and the product quality is improved.

[0026] In the preferred implementation, the slope cutting process of the die includes the following steps:

[0027] S1: The loading device places the cage to be processed above the cutting slope bottom die, so that it is in contact with the arc-shaped concave surface, and the initial position is that the center line of any window hole of the cage corresponds to the bisector of the arc-shaped concave surface, and the two adjacent window holes on both sides correspond to two cutting slope through holes respectively, so as to ensure the punching angle;

[0028] S2: Start the punch to make the upper connecting plate drive the upper die plate, the cage plate, the upper positioning plate, the cutting slope punch and the pressing fixing block move downward at the same time, the pressing fixing block first contacts the cage and presses the cage on the cutting slope bottom die under the action of the spring;

[0029] S3: The cutting slope punch continues to move downward, punches the excess material on the window hole beam into the cutting slope through hole, and completes the single cutting slope;

[0030] S4: The loading device rotates, and the operations of S1-S3 are repeated to cut the slopes of other window hole beams of the cage in turn.

[0031] The above structure has the following beneficial effects:

[0032] 1. The cutting slope punch vertically moves downward to directly punch the overlapping part of the window hole beam of the cage and the vertical ground projection of the cutting slope through hole, thereby cutting part of the material of the window hole beam to form a slope surface from the window hole beam towards the bearing outer ring side to the bearing inner ring side, which not only meets the original processing requirements but also reduces the flow of the internal material of the window hole beam when the groove is processed, avoids the problem of deformation of the window hole beam, and at the same time, the cutting slope can remove the excess material on the cage, reduce the weight of the cage, and make the performance of the cage more stable.

[0033] 2. The initial position is set to make the center line of any window hole of the cage coincide with the bisector of the arc-shaped surface, and the two adjacent window holes on both sides of any window hole of the cage correspond to two cutting slope through holes respectively to ensure the punching angle. At this time, the window hole beams of the two window holes away from the arc-shaped bisector and the corresponding cutting slope through hole have overlapping parts in the vertical ground direction projection. The two cutting slope punches move downward to punch the overlapping parts into the cutting slope through hole, realize the cutting slope operation of processing the two window hole beams, and improve the efficiency of cutting slope.

[0034] 3. The arc-shaped pressing fixing block is arranged to fix the cage, so that the cage is fixed stably and conveniently for cutting slope. The curvature of the arc-shaped pressing member is designed to match the curvature of the bearing inner ring side of the cage, and the arc-shaped concave surface is designed to match the curvature of the bearing outer ring side of the cage. The cage is attached between the arc-shaped surface and the arc-shaped pressing member, thereby preventing the cage from being extruded and deformed, and ensuring the quality of the finished product of the cage. BRIEF DESCRIPTION OF DRAWINGS

[0035] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

[0036] Figure 1 A perspective view of one illustrative embodiment of the application;

[0037] Figure 2 A perspective view of one illustrative embodiment of the application Figure 1 An enlarged view of one illustrative embodiment of the application;

[0038] Figure 3 A perspective view of one illustrative embodiment of the application;

[0039] Figure 4 A perspective view of one illustrative embodiment of the application;

[0040] Figure 5 A cross-sectional view of one illustrative embodiment of the application;

[0041] Figure 6 A cross-sectional view of one illustrative embodiment of the application from another perspective;

[0042] Figure 7 An assembly view of one illustrative embodiment of the application;

[0043] Reference Signs List:

[0044] 1. A cutting slope mold; 10. An upper connecting plate; 11. An upper mold plate; 12. An elastic telescopic column; 13. A lower connecting plate; 14. A retainer plate; 15. An upper positioning plate; 16. A punch guide rail; 17. A cutting slope bottom mold; 170. An arc-shaped concave surface; 171. A cutting slope through hole; 18. A cutting slope punch; 19. A lower mold base; 190. A positioning hole;

[0045] 2. A pressing mechanism; 20. A pressing fixed block; 200. A matching groove; 21. A spring;

[0046] 3. A feeding device;

[0047] 4. A retainer; 40. A window beam; 41. A slope surface;

[0048] 5. A punch. DETAILED DESCRIPTION

[0049] In order to more clearly illustrate the overall concept of the application, the following will be described in detail in an exemplary manner with reference to the accompanying drawings.

[0050] It should be noted that in the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced according to other embodiments that do not require some of the specific details described below. Therefore, the scope of the present application is not limited to the specific embodiments described below.

[0051] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium.

[0052] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be direct connection, or indirect connection through an intermediate medium; it can be internal communication of two elements or interaction relationship between two elements. However, it is noted that direct connection means that the connection between the two main bodies does not form a connection relationship through an excessive structure, but is connected to form a whole only through the connection structure. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0053] In the present application, the description such as "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features.

[0054] As shown in Figures 1-7 The present application provides a tapered roller bearing cage chamfering die, which comprises:

[0055] The chamfering die 1 comprises a chamfering bottom die 17 and a chamfering punch 18;

[0056] The chamfering bottom die 17 is provided with an arc-shaped concave surface 170, the curvature of the arc-shaped concave surface 170 is matched with the curvature of the cage 4, and the arc-shaped concave surface 170 is provided with a chamfering through hole 171, and the chamfering punch 18 can extend into the chamfering through hole 171 and tightly fit with the chamfering through hole 171;

[0057] The retainer 4 is fixed to the slope cutting die 17 by the pressing mechanism 2 and is in close contact with the arc concave surface 170. The slope cutting punch 18 vertically moves downward to cut the overlapping part of the vertical ground projection of the window beam 40 and the vertical ground projection of the slope through hole 171, thereby forming the slope surface 41 from the window beam 40 towards the bearing outer ring side to the bearing inner ring side.

[0058] The mechanism has the slope cutting die 17 with the arc concave surface 170, the curvature of the arc concave surface 170 is matched with the curvature of the retainer 4 to be machined, the retainer 4 is placed on the arc concave surface 170 and is in close contact with the slope cutting die 17, thereby ensuring that the retainer 4 of the self-aligning roller bearing with the large and small end faces is not deformed. The arc concave surface 170 is provided with the slope through hole 171, the vertical ground projection of the window beam 40 overlaps with the vertical ground projection of the slope through hole 171, the slope cutting punch 18 can extend into the slope through hole 171 and is in close contact with the slope through hole 171, the slope cutting punch 18 vertically moves downward to directly punch the overlapping part of the window beam of the retainer 4 and the vertical ground projection of the slope through hole 171, thereby cutting part of the material of the window beam 40 to form the slope surface 41 from the window beam 40 towards the bearing outer ring side to the bearing inner ring side. The slope cutting not only meets the original machining requirements but also reduces the flow of the internal material of the window beam 40 when the groove is machined, thereby avoiding the deformation of the window beam 40. At the same time, the slope cutting can remove the excess material on the retainer 4, thereby reducing the weight of the retainer 4 and making the performance of the retainer 4 more stable.

[0059] As a preferred embodiment of the present application, Figure 1 and Figure 5 The arc concave surface 170 is provided with two slope through holes 171, and the slope through holes 171 are symmetrically arranged with the bisector of the arc concave surface 170 as the center line.

[0060] The two slope through holes 171 are provided, and the slope cutting punch 18 vertically downward into the slope through hole 171 can cut the two window beams 40 of the retainer 4, thereby improving the slope cutting efficiency and improving the production of the product.

[0061] As a preferred embodiment of the present embodiment, Figure 5 The center line of any window of the retainer 4 is opposite to the bisector of the arc surface, the two slope through holes 171 are located in the two adjacent windows, and the slope cutting punch 18 vertically moves downward to cut the two window beams.

[0062] Specifically, the line of each window hole of the initial position holder 4 is arranged to coincide with the bisector of the arc surface, and the two adjacent window holes on both sides of each window hole of the holder 4 are respectively opposite to the two slope through holes 171 to ensure the blanking angle. At this time, the window hole beams 40 of the two window holes away from the bisector of the arc surface and the corresponding slope through holes 171 have overlapping parts in the projection in the direction perpendicular to the ground. The two slope punches 18 are lowered to punch the overlapping parts into the slope through holes 171, thereby realizing the slope cutting operation of the two window hole beams. At this time, the cut slope surfaces 41 of the two window hole beams 40 are opposite to each other, the single slope cutting is completed, and the structural design is more reasonable.

[0063] In the preferred implementation, as Figure 1 and Figure 2 The pressing mechanism 2 includes a pressing fixed block 20, which has an arc surface with an arc degree matched with the arc degree of the surface of the holder 4 facing the bearing inner ring. When the slope bottom die 17 is pressed down, the pressing fixed block presses the positions of the two window holes on both sides of the two window hole beams 40 to be machined, so that the holder 4 is tightly attached between the arc concave surface 170 and the pressing fixed block to fix the holder 4.

[0064] The arc-shaped pressing fixed block is arranged to fix the holder 4, so that the holder 4 is fixed stably and facilitates slope cutting. The arc degree of the pressing fixed block 20 is matched with the arc degree of the surface of the holder 4 facing the bearing inner ring, and the arc concave surface 170 is matched with the arc degree of the surface of the holder 4 facing the bearing outer ring. The holder 4 is attached between the arc surface and the arc-shaped pressing part 20, thereby preventing the holder 4 from being extruded and deformed, and ensuring the finished product quality of the holder 4.

[0065] As a preferred scheme of the preferred implementation, as Figure 1 and Figure 7 The slope die 1 further includes an upper connecting plate 10 and a lower connecting plate 13. The upper connecting plate 10 and the lower connecting plate 13 are connected to the punch 5 and are connected through the elastic expansion column 12. The upper connecting plate 10 is sequentially connected to the upper die plate 11, the holder plate 14, the upper positioning plate 15 and the slope punch 18 from top to bottom. The slope bottom die 17 is fixed to the lower connecting plate 13 through the lower die seat 19. The pressing fixed block is arranged below the holder plate 14 and located on both sides of the upper positioning plate 15. The spring 21 is arranged between the pressing fixed block and the holder plate 14.

[0066] The upper connecting plate 10 and the lower connecting plate 13 are connected to the punch 5, the upper connecting plate 10 drives the upper die plate 11, the retainer plate 14, the upper positioning plate 15 and the slope cutting punch 18 when pressed, the fixed block is pressed on the two sides of the window beam 40 of the two retainers 4 to fix the position of the retainers 4, the retainers 4 are fixed by using the elastic compression force, the force on the retainers 4 is more moderate, the retainers 4 are not in rigid contact, the retainers 4 are not deformed, and thus the production qualified rate of the retainers 4 is improved, the slope cutting punch 18 enters the slope cutting hole 171 to perform blanking and complete single slope cutting operation, and the structure design is more reasonable.

[0067] Further, as Figure 1 , the retainer plate 14 is provided with a punch guide rail 16 perpendicular to the ground to ensure that the movement path of the slope cutting punch 18 is accurate.

[0068] The punch guide rail 16 can ensure the accuracy of the vertical extension of the slope cutting punch 18 into the slope cutting hole 171, and improve the product qualified rate

[0069] As another preferred scheme in the preferred implementation mode, as Figure 2 , the fixed block is provided with a matching groove 200, and the slope cutting punch 18 is arranged in the matching groove and can move relative to the fixed block and the slope cutting punch 18.

[0070] The matching groove of the fixed block and the slope cutting punch 18 cooperate with each other to realize the positioning of the movement of the fixed block, the fixed block is pressed on the two sides of the window beam 40 of the two retainers 4 to fix the position of the retainers 4, then the slope cutting punch 18 enters the slope cutting hole 171, after cutting the slope, under the elastic force of the spring 21, the fixed block moves to the end portion of the slope cutting punch 18, the waste of the window beam 40 that may be adhered to the end portion of the slope cutting punch 18 is removed, thereby facilitating the next slope cutting, and improving the product production qualified rate.

[0071] In the preferred implementation mode, as Figure 3 and Figure 4 , the slope cutting bottom die 17 is detachably connected with the lower die seat 19, the lower die seat 19 is provided with a positioning hole 190, and the positioning hole 190 is used for positioning the lower die seat 19 and the slope cutting die 1.

[0072] The slope cutting bottom die 17 and the lower die seat 19 are detachable, so that different slope cutting bottom dies 17 with different arc-shaped concave surfaces 170 can be replaced to correspond to different sizes of the plummer block bearing retainer 4, thereby expanding the compatibility of the slope cutting equipment to different types and different models of the retainers 4.

[0073] As a preferred embodiment of the present application, as Figure 7Further comprising a feeding device 3, the feeding device 3 is used for placing the retainer 4 to be processed above the slope cutting die 17, and making the retainer 4 fit the arc-shaped concave surface 170, after the single slope cutting is completed, the feeding device 3 can rotate to drive the retainer 4 to rotate so that the window beam at different positions of the retainer 4 can be subjected to the slope cutting operation.

[0074] The feeding device 3 is used for placing the retainer 4 to be processed above the slope cutting die 17, and placing in the initial position, that is, the center line of any window of the retainer 4 corresponds to the bisector of the arc-shaped concave surface 170 and the adjacent two windows on both sides are opposite to the two slope through holes 171 respectively, after the single slope cutting is completed, the feeding device 3 rotates, and the rotation angle can be controlled according to the interval arc radian of the adjacent window center lines arranged on the retainer 4,

[0075] Specifically, the small end of the retainer is fixed to the fixed part of the feeding device 3, the fixed part can be a clamping jaw cylinder, the feeding device rotates by the power source servo motor, the fixed part is coaxially connected with the motor shaft of the servo motor, after the single slope cutting is completed, the rotation angle of the servo motor can be controlled according to the interval arc radian of the adjacent window center lines arranged on the retainer 4, so that the retainer 4 rotates according to the angle set by the servo motor, the slope cutting operation on the other window beam 40 of the retainer 4 is realized, the slope cutting precision and efficiency of the window beam 400 are improved, and the product quality is improved.

[0076] In the preferred implementation mode, the slope cutting process of the mold comprises the following steps:

[0077] S1: the feeding device 3 places the retainer 4 to be processed above the slope cutting die 17, and makes it fit the arc-shaped concave surface 170, the initial position is that the center line of any window of the retainer 4 corresponds to the bisector of the arc-shaped concave surface 170 and the adjacent two windows on both sides are opposite to the two slope through holes 171 respectively, so as to ensure the blanking angle;

[0078] S2: the punch 5 is started to drive the upper connecting plate 10 to move downward to drive the upper die plate 11, the retainer plate 14, the upper positioning plate 15, the slope cutting punch 18 and the compression fixing block to move downward at the same time, the compression fixing block first contacts the retainer 4 and compresses the retainer 4 on the slope cutting die 17 under the action of the spring 21;

[0079] S3: the slope cutting punch 18 continues to move downward to punch the corresponding excess material on the window beam 40 into the slope through hole 171, and the single slope cutting is completed;

[0080] S4: the feeding device 3 rotates to repeat the operations of S1-S3, and the slope cutting is performed on the other window beam 40 of the retainer 4 in turn.

[0081] The places not mentioned in the application can be realized by using or referring to the existing technology.

[0082] The various embodiments in the specification are described in progressive manner, and the same or similar parts between the various embodiments can be mutually referred to, and each embodiment focuses on the difference from other embodiments.

[0083] The above merely illustrates the embodiments of the present application, but is not intended to limit the present application. The present application can be variously changed and modified by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. A crowned roller bearing cage chamfering die characterized by, The application relates to a chamfering die, which comprises a chamfering die bottom and a chamfering die punch. The chamfering die bottom is provided with an arc-shaped concave surface, the arc of which is matched with the arc of a retainer, and the arc-shaped concave surface is provided with chamfering through holes, the chamfering punch can be inserted into the chamfering through holes and tightly matched with the chamfering through holes; the arc-shaped concave surface is provided with two chamfering through holes, which are symmetrically arranged with the bisector of the arc-shaped concave surface as the middle line. The retainer is fixed on the chamfering die bottom through a pressing mechanism and tightly matched with the arc-shaped concave surface, the chamfering punch vertically moves downwards to cut off the overlapping part of the vertical ground direction projection of the window beam and the vertical ground direction projection of the chamfering through hole, thereby forming a slope surface from the window beam towards the bearing outer ring to the bearing inner ring. The middle line of any window hole of the retainer is opposite to the bisector of the arc-shaped concave surface, and the two chamfering through holes are located in the two window holes on the two adjacent sides, and the chamfering punch vertically moves downwards to perform chamfering operation on the two window beams.

2. A trochoidal bearing retainer chamfering die according to claim 1, wherein, The pressing mechanism comprises a pressing fixed block, the pressing fixed block is provided with an arc surface, the arc of the arc surface is matched with the arc of the retainer towards the bearing inner ring, and when the chamfering die bottom is pressed, the pressing fixed block presses the window hole positions of the two window beams to be machined on the two sides, so that the retainer is tightly matched between the arc-shaped concave surface and the pressing fixed block to fix the retainer.

3. A trochoidal bearing retainer chamfering die according to claim 2, wherein, The chamfering die further comprises an upper connecting plate and a lower connecting plate, the upper connecting plate and the lower connecting plate are connected with a punch and connected through elastic telescopic columns, the upper connecting plate is sequentially connected with an upper die plate, a retainer plate, an upper positioning plate and the chamfering punch from top to bottom, the chamfering die bottom is fixed on the lower connecting plate through a lower die seat, the pressing fixed block is arranged below the retainer plate and located on the two sides of the upper positioning plate, and a spring is arranged between the pressing fixed block and the retainer plate.

4. A trochoidal bearing retainer chamfering die according to claim 3, wherein, The pressing fixed block is provided with a matching groove, the chamfering punch is arranged in the matching groove, and the pressing fixed block and the chamfering punch can relatively move.

5. The tapered roller bearing cage trim die of claim 3, wherein: The rear side of the retainer plate is provided with a punch guide rail perpendicular to the ground, so that the movement path of the chamfering punch is accurately kept.

6. A trochoidal bearing retainer chamfering die according to claim 4, wherein, The chamfering die bottom is detachably connected with the lower die seat, the lower die seat is provided with positioning holes, and the positioning holes are used for positioning the lower die seat and the chamfering die.

7. A trochoidal bearing retainer chamfering die according to claim 4 wherein, The feeding device is used for placing the retainer to be machined above the chamfering die bottom and tightly matching the retainer with the arc-shaped concave surface, after single chamfering is completed, the feeding device can rotate to drive the retainer to rotate, so that the window beams at different positions of the retainer are subjected to chamfering operation.

8. The tapered roller bearing cage trim die of claim 1, wherein: The application further comprises the following steps:

9. A chamfering process based on the chamfering die for a roller bearing cage according to any one of claims 1 to 8, characterized in that, S1: the feeding device places the retainer to be machined above the chamfering die bottom, so that the retainer is tightly matched with the arc-shaped concave surface, the initial position is that the center line of any window hole of the retainer corresponds to the bisector of the arc-shaped concave surface and the two adjacent window holes on the two sides correspond to the two chamfering through holes, so as to ensure the punching angle. ​ S2: start the punch to make the upper connecting plate down to drive the upper die plate, the retainer plate, the upper positioning plate, the slope cutting punch and the compression fixing block move down at the same time, the compression fixing block first contacts the retainer and under the action of the spring, the retainer is pressed tightly on the slope cutting bottom die; S3: the slope cutting punch continues to move down, and the corresponding excess material on the window beam is punched into the slope through hole, and the single slope cutting is completed; S4: the feeding device rotates, and the operations of S1-S3 are repeated to cut the slopes of other window beams of the retainer in turn.

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