Large-size high-precision retainer hole chopping tool

Abstract

The invention relates to the technical field of bearing manufacturing, in particular to a hole chopping tool for a large-size high-precision retainer, and aims to solve the problems that when a traditional punching tool is used for machining a large-size retainer pocket lock point, deformation is prone to occurring, and the width of the lock point is not stably controlled. The punch unit and the buffer unit are both arranged on the supporting unit and oppositely arranged on the two sides of a supporting part in the supporting unit, the buffer unit is installed on the supporting unit, one end of the punch unit is detachably connected with the supporting unit, and the other end of the punch unit is detachably connected with the buffering unit. And the other end of the punch unit jumps over a supporting part in the supporting unit and is lapped above the buffer unit. The hole chopping tool is mainly used for hole chopping machining of pocket lock points in large and oversize bearing retainers.

Description

Technical Field

[0001] The invention relates to the technical field of bearing manufacturing, and in particular to a large-size and high-precision retainer hole chopping tool. Background Art

[0002] At present, domestic aviation bearings are mainly medium-sized and medium-large, with a bearing accuracy level of P4. Domestic processing experience is rich, and manufacturing equipment is mature and stable. With the continuous development of my country's aviation industry, some large and extra-large bearings have been independently designed and developed, and large size and high precision have gradually become the main characteristics of aircraft engine bearings.

[0003] During the operation of bearings, cages play a vital role, especially when large and extra-large bearings are working, the cages will be subjected to large centrifugal forces, impacts and vibrations. In order to ensure the processing quality of large and extra-large bearing cages, the cage end faces, inner diameters, outer diameters and other surfaces are processed by high-precision equipment, but some cage pocket locking points are still processed by stamping. Large and extra-large bearing cages are large in size, and the presses used have a large stroke range and high pressure. They are easy to deform during processing, and the locking point width control is unstable, which cannot meet the high-precision requirements. This leads to the embarrassing situation that the processing range of the equipment meets the requirements, but the processing accuracy is not enough; the processing accuracy meets the requirements, but the processing range does not meet the requirements.

[0004] In summary, there is an urgent need for a large-size and high-precision cage chopping tool to solve the above problems. Summary of the invention

[0005] The present invention aims to solve the problem that the locking point of the pocket hole of a large-sized cage is easily deformed and the locking point width is unstable when the locking point is processed by the traditional punching tool, and further provides a large-sized high-precision cage hole chopping tool;

[0006] A large-size high-precision retainer chopping tool, the chopping tool comprising a support unit, a punch unit and a buffer unit, the punch unit and the buffer unit are both arranged on the support unit, and the punch unit and the buffer unit are relatively arranged on both sides of a support portion in the support unit, the buffer unit is installed on the support unit, one end of the punch unit is detachably connected to the support unit, and the other end of the punch unit jumps over the support portion in the support unit and is placed above the buffer unit;

[0007] Further, the support unit includes a tooling base and a workpiece support, the workpiece support is arranged at the top center of the tooling base, and the workpiece support is detachably connected to the tooling base by bolts;

[0008] Furthermore, a No. 1 positioning groove is re-processed on the top of the tooling base, a No. 1 positioning convex block is processed on the bottom of the workpiece support, and the No. 1 positioning convex block is arranged correspondingly with the No. 1 positioning groove, and the tooling base realizes positioning of the workpiece support through the cooperation of the No. 1 positioning convex block and the No. 1 positioning groove;

[0009] Furthermore, a concave arc-shaped supporting surface is processed on the top of the workpiece support, a positioning protrusion is provided at the center of the arc-shaped supporting surface, and the positioning protrusion and the arc-shaped supporting surface are integrally formed;

[0010] Furthermore, the contour of the positioning protrusion is matched with the contour of the cage pocket, and the height of the positioning protrusion is 3 mm:

[0011] Further, the buffer unit includes a buffer spring and a guide column, the guide column is vertically arranged on the top of the tooling base, and the guide column is arranged on one side of the workpiece support, the guide column is detachably connected to the tooling base by bolts, the buffer spring is sleeved on the guide column, and the bottom of the buffer spring is fixed to the top of the tooling base by hot melt adhesive;

[0012] Further, the punch unit includes a punch, a pressure rod, a mounting seat and a hinge assembly, the mounting seat is arranged on the top of the tooling base, and the mounting seat is arranged on the other side of the workpiece support, the mounting seat is detachably connected to the tooling base by bolts, one end of the pressure rod is arranged on the mounting seat and is hingedly arranged with the mounting seat through the hinge assembly, the other end of the pressure rod jumps over the workpiece support and is placed above the buffer spring, the punch is inserted in the pressure rod and is detachably connected to the pressure rod, and the working end of the punch is arranged corresponding to the positioning protrusion;

[0013] Further, the punch includes an insert screw, a No. 2 positioning protrusion and a punching block, the punching block, the No. 2 positioning protrusion and the insert screw are coaxially arranged in sequence from top to bottom, and the fixed end of the insert screw is fixedly connected to the bottom of the No. 2 positioning protrusion, the top of the No. 2 positioning protrusion is fixedly connected to the fixed end of the punching block, the top of the punching block is a working end, and four punching points are arranged on the working end of the punching block, and the punching block performs locking point processing on the pocket hole of the cage through the four punching points;

[0014] Furthermore, a No. 2 positioning groove is processed at the bottom of the pressure rod, and a connecting through hole is processed at the bottom of the No. 2 positioning groove. The threaded end of the inserted screw in the punch passes through the No. 2 positioning groove and the connecting through hole in sequence and extends to the top of the pressure rod. A locking nut is provided on the top of the pressure rod, and the locking nut is sleeved on the threaded end of the inserted screw. The pressure rod cooperates with the No. 2 positioning groove and the No. 2 positioning protrusion to position the punch, and the pressure rod cooperates with the inserted screw to realize threaded disassembly connection with the punch through the locking nut;

[0015] Furthermore, a No. 3 positioning protrusion is provided at the bottom of the mounting seat, a No. 3 positioning groove is processed at the top of the tooling base, and the No. 3 positioning protrusion is correspondingly arranged with the No. 3 positioning groove, and the tooling base positions the mounting seat through the cooperation between the No. 3 positioning groove and the No. 3 positioning protrusion.

[0016] The beneficial effects of this application compared to the prior art are as follows:

[0017] 1. The present application provides a large-size high-precision cage chopping tool, which can realize the chopping of large and extra-large bearing cages using a high-precision hydraulic press (small size). The device has a simple structure and is easy to control. It can be applied to the processing of cages of different sizes. It can ensure the stability of the bearing cage when chopping the pocket holes, and can ensure that the positioning references of multiple pocket holes are consistent, which is of great significance for solving the problems of dimensional deformation and unstable locking amount during the cage chopping process.

[0018] 2. The present application provides a large-size, high-precision retainer hole chopping tool, which simplifies the structure of the existing tooling in view of the processing characteristics of the locking points of the pocket holes of large and extra-large bearing retainers. Non-important limit constraint structures are optimized without affecting the subsequent use of locking points. The production cost of the optimized tooling is greatly reduced, which is in line with the requirements of industrial production economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the hole chopping tool described in this application;

[0020] Figure 2 This is a schematic diagram of the structure of the tool base in the hole chopping tool described in this application;

[0021] Figure 3 This is a schematic diagram of the structure of the workpiece base in the hole chopping tool described in this application;

[0022] Figure 4 This is a schematic diagram of the structure of the buffer spring in the hole chopping tool described in this application;

[0023] Figure 5 This is a schematic diagram of the structure of the guide column in the hole chopping tool described in this application;

[0024] Figure 6 This is a schematic diagram of the structure of the punch in the hole chopping tool described in this application;

[0025] Figure 7 This is a schematic diagram of the structure of the pressure rod in the hole chopping tool described in this application;

[0026] Figure 8 This is a schematic diagram of the structure of the mounting seat in the hole chopping tool described in this application;

[0027] Fig. 9This is a schematic diagram of the structure of the fixing nut in the hole chopping tool described in this application;

[0028] Fig.10 This is a schematic diagram of the structure of the core shaft of the hole chopping tool described in this application;

[0029] In the figure: 1 tooling base, 11 No. 1 positioning groove, 12 No. 3 positioning groove, 2 workpiece support, 21 No. 1 positioning convex block, 22 positioning convex block, 3 buffer spring, 4 guide column, 5 punch, 51 insert screw, 52 No. 2 positioning convex block, 53 punching block, 6 pressure rod, 61 No. 2 positioning groove, 62 connecting through hole, 7 mounting seat, 71 No. 3 positioning convex block, 8 fixing nut, 9 spindle and 10 bearing retainer. Point F in the figure is the contact point between the high-precision hydraulic press and the pressure rod. DETAILED DESCRIPTION

[0030] Specific implementation method 1: Combination Figures 1 to 10 To explain the present embodiment, a large-size and high-precision retainer chopping tool is provided in the present embodiment. The chopping tool comprises a support unit, a punch unit and a buffer unit. The punch unit and the buffer unit are both arranged on the support unit, and the punch unit and the buffer unit are relatively arranged on both sides of the support portion in the support unit. The buffer unit is installed on the support unit, one end of the punch unit is detachably connected to the support unit, and the other end of the punch unit jumps over the support portion in the support unit and is placed above the buffer unit.

[0031] In this embodiment, a large-size and high-precision cage chopping tool is provided, which can realize the chopping hole processing of large and extra-large bearing cages using a high-precision hydraulic press (small size). The device has a simple structure and is easy to control. It can be applied to the processing of cages of different sizes. It is of great significance to solve the problems of dimensional deformation and unstable locking amount in the cage chopping process.

[0032] Specific implementation method 2: Combination Figures 1 to 10 This embodiment is described. The difference between this embodiment and the first embodiment is that the support unit includes a tool base 1 and a workpiece support 2. The workpiece support 2 is arranged at the top center of the tool base 1, and the workpiece support 2 is detachably connected to the tool base 1 by bolts. Other components and connection methods are the same as those of the first embodiment.

[0033] Specific implementation method three: Combination Figures 1 to 10 This embodiment is described. The difference between this embodiment and the second embodiment is that the top of the tool base 1 is re-processed with a No. 1 positioning groove 11, and the bottom of the workpiece support 2 is processed with a No. 1 positioning convex block 21, and the No. 1 positioning convex block 21 is arranged correspondingly with the No. 1 positioning groove 11. The tool base 1 realizes positioning of the workpiece support 2 through the cooperation of the No. 1 positioning convex block 21 and the No. 1 positioning groove 11. Other components and connection methods are the same as those of the second embodiment.

[0034] Specific implementation method four: Combination Figures 1 to 10 This embodiment is described. The difference between this embodiment and the third embodiment is that a concave arc-shaped support surface is processed on the top of the workpiece support 2, a positioning protrusion 22 is provided at the center of the arc-shaped support surface, and the positioning protrusion 22 is integrally formed with the arc-shaped support surface. Other components and connection methods are the same as those of the third embodiment.

[0035] Specific implementation method five: Combination Figures 1 to 10 This embodiment is described. The difference between this embodiment and the fourth embodiment is that the contour of the positioning protrusion 22 is matched with the contour of the cage pocket, and the height of the positioning protrusion 22 is 3 mm. The other components and connection methods are the same as those of the fourth embodiment.

[0036] In combination with specific embodiments two to five, the tooling base 1 is used as the main supporting component to support all components in the hole chopping tooling, and the workpiece support 2 is used to support the bearing retainer to be processed. In order to improve the fit between the workpiece support 2 and the bearing retainer, the workpiece support 2 adopts an arc surface design that is the same as the outer contour surface of the retainer. In order to ensure the position accuracy of each hole chopping and the accuracy of the retainer positioning, a positioning protrusion is further provided on the supporting surface of the workpiece support 2. The positioning protrusion cooperates with the pocket hole to be chopped, and retains sufficient locking point processing depth. The present application also provides a No. 1 positioning protrusion 21 and a No. 1 positioning groove 11 on the tooling base 1 and the workpiece support 2, respectively, to improve the positioning accuracy between the workpiece support 2 and the tooling base 1.

[0037] Specific implementation method six: Combination Figures 1 to 10 This embodiment is described. The difference between this embodiment and the specific embodiment is that the buffer unit includes a buffer spring 3 and a guide column 4. The guide column 4 is vertically arranged on the top of the tooling base 1, and the guide column 4 is arranged on one side of the workpiece support 2. The guide column 4 is detachably connected to the tooling base 1 by bolts, and the buffer spring 3 is sleeved on the guide column 4, and the bottom of the buffer spring 3 is fixed to the top of the tooling base 1 by hot melt adhesive. Other components and connection methods are the same as those of the specific embodiment 5.

[0038] The function of the buffer unit in this embodiment is to, on the one hand, buffer the impact force when the pressure rod 6 is pressed down, and on the other hand, reset the pressure rod 6 through the rebound force of the buffer spring 3 after the high-precision hydraulic press is separated from the pressure rod 6.

[0039] Specific implementation method seven: Combination Figures 1 to 10This embodiment is described. The difference between this embodiment and the sixth embodiment is that the punch unit includes a punch 5, a pressure rod 6, a mounting seat 7 and a hinge assembly. The mounting seat 7 is arranged on the top of the tool base 1, and the mounting seat 7 is arranged on the other side of the workpiece support 2. The mounting seat 7 is detachably connected to the tool base 1 by bolts. One end of the pressure rod 6 is arranged on the mounting seat 7 and is hinged to the mounting seat 7 by the hinge assembly. The other end of the pressure rod 6 jumps over the workpiece support 2 and is placed above the buffer spring 3. The punch 5 is inserted in the pressure rod 6 and is detachably connected to the pressure rod 6. The working end of the punch 5 is arranged corresponding to the positioning protrusion 22. Other components and connection methods are the same as those of the sixth embodiment.

[0040] In this embodiment, the hinge assembly includes a locking nut 8 and a core shaft 9. An insert block is provided at one end of the pressure rod 6. The pressure rod 6 is inserted into the mounting seat 7 through the insert block. One end of the core shaft 9 passes through the mounting seat 7 and the insert blocks on the pressure rod 6 and extends to the locking nut 8 located on the outside of the mounting seat 7. The mounting seat 7 and the pressure rod 6 are connected together by the locking nut 8 and the core shaft 9. The clearance between the insert block and the core shaft 9 is matched to ensure sufficient rotational freedom. The punch 5 is connected to the pressure rod 6 in a detachable connection manner. In this way, the designer takes into account that the punch 5 is a consumable part, and the detachable connection method facilitates the replacement of the punch 5.

[0041] Specific implementation method eight: Combination Figures 1 to 10 This embodiment is described. The difference between this embodiment and the seventh embodiment is that the punch 5 includes an insertion screw 51, a second positioning protrusion 52 and a punching block 53. The punching block 53, the second positioning protrusion 52 and the insertion screw 51 are coaxially arranged from top to bottom, and the fixed end of the insertion screw 51 is fixedly connected to the bottom of the second positioning protrusion 52, and the top of the second positioning protrusion 52 is fixedly connected to the fixed end of the punching block 53. The top of the punching block 53 is the working end. The working end of the punching block 53 is provided with four punching points. The punching block 53 performs locking point processing on the cage pocket through the four punching points. Other components and connection methods are the same as those of the seventh embodiment.

[0042] In this embodiment, the No. 2 positioning protrusion 52 is used to cooperate with the No. 2 positioning groove 61 for positioning to ensure the stability of the installation of the punch 5. The punch block 53 is the main working part, which is used to punch the edge of the pocket hole to complete the preparation of the locking point. The insert screw 51 is used as a connecting part to connect with the pressure rod 6.

[0043] Specific implementation method nine: Combination Figures 1 to 10This embodiment is described. The difference between this embodiment and the eighth embodiment is that the bottom of the pressure rod 6 is processed with a second positioning groove 61, and the bottom of the second positioning groove 61 is processed with a connecting through hole 62. The threaded end of the plug-in screw 51 in the punch 5 passes through the second positioning groove 61 and the connecting through hole 62 in sequence and extends to the top of the pressure rod 6. A locking nut is provided on the top of the pressure rod 6, and the locking nut is sleeved on the threaded end of the plug-in screw 51. The pressure rod 6 cooperates with the second positioning groove 61 and the second positioning protrusion 52 to realize the positioning of the punch 5. The pressure rod 6 cooperates with the plug-in screw 51 through the locking nut to realize the threaded detachable connection with the punch 5. Other components and connection methods are the same as those of the eighth embodiment.

[0044] Specific implementation method ten: Combination Figures 1 to 10 This embodiment is described. The difference between this embodiment and the specific embodiment eight is that the bottom of the mounting seat 7 is provided with a No. 3 positioning protrusion 71, the top of the tooling base 1 is processed with a No. 3 positioning groove 12, and the No. 3 positioning protrusion 71 is arranged correspondingly with the No. 3 positioning groove 12, and the tooling base 1 realizes the positioning of the mounting seat 7 through the No. 3 positioning groove 12 and the No. 3 positioning protrusion 71. The other components and connection methods are the same as those of the specific embodiment eight.

[0045] In this embodiment, the third positioning protrusion 71 and the third positioning groove 12 are used to determine the arrangement position of the mounting seat 7 to ensure the positioning accuracy of the mounting seat 7 .

[0046] The present invention has been disclosed as above with preferred implementation cases, but it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent implementation cases with equivalent changes by using the above-disclosed structures and technical contents without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above implementation cases based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

[0047] How it works

[0048] When the present application is used, the various components are first assembled according to the connection relationship described in Specific Embodiments 1 to 10, the bearing retainer that needs to be chopped is installed on the workpiece support 2, and the pocket hole that needs to be chopped is set on the positioning protrusion 22, one end of the pressure rod 6 passes through the bearing retainer and is placed on the buffer spring 3, and the tooling with the installed bearing retainer is transferred to the bottom of the high-precision hydraulic press, and it is ensured that the stamping end of the high-precision hydraulic press is located above the end of the pressure rod 6 placed on the buffer spring 3. After the arrangement is completed, the high-precision hydraulic press is started, and the stamping end of the high-precision hydraulic press drives the pressure rod 6 to move downward, and at the same time drives the punch 5 to impact the target pocket hole, and the target pocket hole is locked. After the locking point processing of the target pocket hole is completed, the staff manually rotates the bearing retainer clockwise so that the next target pocket hole is set on the positioning protrusion 22, and repeats the above-mentioned locking point processing steps until the locking point processing of all pocket holes in the bearing retainer is completed.

Claims

1. A large-size high-precision cage chopping tool, characterized by: The hole chopping tool includes a support unit, a punch unit and a buffer unit. The punch unit and the buffer unit are both arranged on the support unit, and the punch unit and the buffer unit are relatively arranged on both sides of the support part in the support unit. The buffer unit is installed on the support unit, one end of the punch unit is detachably connected to the support unit, and the other end of the punch unit jumps over the support part in the support unit and is placed above the buffer unit.

2. A large-size high-precision retainer chopping tool according to claim 1, characterized in that: The support unit comprises a tooling base (1) and a workpiece support (2); the workpiece support (2) is arranged at the top center of the tooling base (1), and the workpiece support (2) is detachably connected to the tooling base (1) via bolts.

3. A large-size high-precision retainer chopping tool according to claim 2, characterized in that: The top of the tool base (1) is re-processed with a No. 1 positioning groove (11), and the bottom of the workpiece support (2) is processed with a No. 1 positioning convex block (21), and the No. 1 positioning convex block (21) and the No. 1 positioning groove (11) are arranged in a corresponding manner. The tool base (1) positions the workpiece support (2) through the cooperation of the No. 1 positioning convex block (21) and the No. 1 positioning groove (11).

4. A large-size high-precision retainer chopping tool according to claim 3, characterized in that: A concave arc-shaped supporting surface is processed on the top of the workpiece support seat (2), a positioning protrusion (22) is provided at the center of the arc-shaped supporting surface, and the positioning protrusion (22) and the arc-shaped supporting surface are integrally formed.

5. A large-size high-precision retainer chopping tool according to claim 4, characterized in that: The contour of the positioning protrusion (22) is matched with the contour of the retaining frame pocket, and the height of the positioning protrusion (22) is 3 mm.

6. A large-size high-precision retainer chopping tool according to claim 5, characterized in that: The buffer unit comprises a buffer spring (3) and a guide column (4), wherein the guide column (4) is vertically arranged on the top of a tooling base (1), and the guide column (4) is arranged on one side of a workpiece support (2), the guide column (4) is detachably connected to the tooling base (1) by means of bolts, the buffer spring (3) is sleeved on the guide column (4), and the bottom of the buffer spring (3) is fixed to the top of the tooling base (1) by means of hot melt adhesive.

7. A large-size high-precision retainer chopping tool according to claim 6, characterized in that: The punch unit comprises a punch (5), a pressure rod (6), a mounting seat (7) and a hinge assembly, wherein the mounting seat (7) is arranged on the top of a tool base (1), and the mounting seat (7) is arranged on the other side of a workpiece support (2), the mounting seat (7) is detachably connected to the tool base (1) by bolts, one end of the pressure rod (6) is arranged on the mounting seat (7) and is hingedly arranged with the mounting seat (7) by the hinge assembly, the other end of the pressure rod (6) jumps over the workpiece support (2) and is placed above the buffer spring (3), the punch (5) is inserted into the pressure rod (6) and is detachably connected to the pressure rod (6), and the working end of the punch (5) is arranged corresponding to the positioning protrusion (22).

8. The large-size high-precision retainer chopping tool according to claim 7 is characterized by: The punch (5) comprises an insert screw (51), a second positioning protrusion (52) and a punching block (53). The punching block (53), the second positioning protrusion (52) and the insert screw (51) are coaxially arranged in sequence from top to bottom, and the fixed end of the insert screw (51) is fixedly connected to the bottom of the second positioning protrusion (52), and the top of the second positioning protrusion (52) is fixedly connected to the fixed end of the punching block (53). The top of the punching block (53) is a working end. Four punching points are arranged on the working end of the punching block (53). The punching block (53) performs locking point processing on the retainer pocket hole through the four punching points.

9. A large-size high-precision retainer chopping tool according to claim 8, characterized in that: The bottom of the pressure rod (6) is processed with a second positioning groove (61), and the bottom of the second positioning groove (61) is processed with a connecting through hole (62). The threaded end of the inserted screw (51) in the punch (5) passes through the second positioning groove (61) and the connecting through hole (62) in sequence and extends to the top of the pressure rod (6). A locking nut is provided on the top of the pressure rod (6), and the locking nut is sleeved on the threaded end of the inserted screw (51). The pressure rod (6) cooperates with the second positioning groove (61) and the second positioning protrusion (52) to position the punch (5). The pressure rod (6) cooperates with the inserted screw (51) to achieve threaded detachable connection with the punch (5).

10. A large-size high-precision retainer chopping tool according to claim 9, characterized in that: A No. 3 positioning protrusion (71) is provided at the bottom of the mounting seat (7), a No. 3 positioning groove (12) is processed at the top of the tooling base (1), and the No. 3 positioning protrusion (71) and the No. 3 positioning groove (12) are arranged in a corresponding manner, and the tooling base (1) positions the mounting seat (7) by means of the No. 3 positioning groove (12) and the No. 3 positioning protrusion (71).

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