Split cylindrical roller cage machining process

Abstract

The present application relates to the processing of entity cage, in particular to the processing technology of split cylindrical roller cage, and specifically includes the following steps: step one: positioning the cage seat on the positioning tool, and drilling the cage seat counterbore; step two: taking the cage seat counterbore processed in step one as the positioning reference, drilling the cage cover counterbore, drilling the cage seat cover matching rivet hole, and removing the cage cover to mill the cage seat pocket hole. The present application optimizes the entire processing procedure and uses the positioning tool. By taking the cage seat counterbore as the positioning reference to process the cage cover counterbore and the cage seat cover matching rivet hole, the workpiece does not deform during the drilling of the cage seat counterbore and can be directly used as the positioning reference of the next step. At the same time, the deburring and shaping procedures in the traditional process are removed, the production rhythm is saved, the uncertain factors affecting the product quality caused by the increased procedures are reduced, the production cost is reduced, the labor intensity of the operator is reduced, and the work efficiency is improved.

Description

Technical Field

[0001] This invention relates to the machining of solid cages, specifically to the machining process of split cylindrical roller cages, belonging to the field of bearing cage machining technology. Background Technology

[0002] The machining of a split cylindrical roller bearing cage, which consists of a cage housing and a cage cover, requires machining the countersunk holes in the cage cover, the rivet holes in the cage housing cover, the countersunk holes in the cage housing, and the pocket holes in the cage housing.

[0003] The traditional processing flow is as follows:

[0004] 30. Drill the countersunk holes for the cage cover, drill the matching rivet holes for the cage seat cover, remove the cage cover and mill the cage seat pocket holes (1. To ensure the coaxiality of the countersunk holes and rivet holes of the cage cover, they need to be machined in one step; 2. To ensure the fit between the cage cover and the seat rivet holes, the cage cover and the seat rivet holes need to be machined together; 3. To ensure the relative position of the rivet holes and the seat pocket holes, the seat pocket holes need to be machined in one step for positioning).

[0005] Step 40: Remove residual burrs (Purpose: To remove residual burrs from the edge of the retainer pocket, reducing their impact on subsequent shaping processes).

[0006] 50. Sequence: Cage base shaping (the cage base has a large diameter and deep hole, and is processed by material removal. The material undergoes stress deformation during material removal, causing slight deformation of the processed workpiece, making it unsuitable as a reference for the next processing step. Manual shaping is required to meet the positioning reference requirements).

[0007] 60. Drill countersunk holes in the cage seat (using pins and pre-machined rivet holes for positioning, drill countersunk holes on both sides of the cage seat. If the shaping in the 50th step is not in place, the coaxiality of the countersunk holes drilled in the 60th step and the rivet holes drilled in the 30th step cannot be guaranteed, which can easily lead to scrap, increase inspection pressure, and increase company losses).

[0008] Traditional processes are lengthy and complex. A fourth deburring step is added to the fifth-stage shaping process to remove burrs that affect the shaping. The fifth-stage shaping process is complex and heavily influenced by the fourth-stage deburring step, resulting in low efficiency and requiring highly skilled operators. Furthermore, manual shaping yields inconsistent results, leading to unstable product quality and difficulty in increasing shaping speed. This becomes a constraint on the entire process when production volume increases. The shaped retainer base serves as the reference for the sixth-stage countersinking hole; the instability of manual shaping directly affects the coaxiality of the countersinking hole and rivet hole in the sixth-stage process, easily resulting in defective products. Summary of the Invention

[0009] In view of the shortcomings of the prior art, the present invention simplifies and optimizes the entire processing procedure and, with the help of matching positioning fixtures, achieves accurate and stable positioning, thus meeting the requirements of the new process design.

[0010] To achieve the above objectives, the technical solution adopted by this invention is: a split-type cylindrical roller cage processing technology, specifically including the following steps:

[0011] Step 1: Position the cage holder on the positioning fixture and drill countersunk holes in the cage holder;

[0012] Step 2: Using the countersunk hole of the cage seat processed in Step 1 as the positioning reference, drill the countersunk hole of the cage cover, drill the matching rivet holes of the cage seat cover, remove the cage cover and mill the cage seat pocket hole.

[0013] Furthermore, the countersunk hole processed in step one is located on the bottom surface of the retainer base, and the side opposite to the bottom surface is the top surface. When processing the countersunk hole on the bottom surface of the retainer base, the top surface of the retainer base will press against the positioning fixture and push the positioning fixture downward.

[0014] Furthermore, in process two, the countersunk hole processing of the cage cover involves flipping the bottom surface of the cage base from process one so that the processed countersunk hole is aligned and positioned with the positioning fixture; at this time, the top surface of the cage base faces upward and fits the cage cover, thereby completing the countersunk hole processing of the cage cover.

[0015] Furthermore, in step two, when the retainer seat and cover are fitted with rivet holes, the drill bit is inserted downwards through the countersunk hole of the retainer cover for machining until the drill bit reaches the position of the positioning fixture and presses the positioning fixture downwards.

[0016] The positioning fixture used in the processing technology of this invention has a telescopic structure;

[0017] The positioning fixture includes: a tire seat, a positioning slider, a fastening bolt, a compression spring, a dustproof sealing ring, and a dustproof reset cover plate; the upper surface of the tire seat has an inner hole for accommodating the positioning slider, and a fastening bolt is fitted inside the positioning slider. The head of the fastening bolt passes through the positioning slider and is fixedly connected to the tire seat. A compression spring is fitted on the outer diameter of the fastening bolt below the positioning slider. The upper end of the compression spring abuts against the lower end face of the positioning slider, and the lower end abuts against the bottom surface of the inner hole of the tire seat; a dustproof sealing ring is also provided between the outer diameter of the positioning slider and the inner wall of the tire seat;

[0018] Furthermore, the outer diameter of the positioning slider matches the inner diameter of the tire seat bore, and the inner diameter of the dustproof sealing ring matches the outer diameter of the positioning slider; this does not affect the movement of the positioning slider within the tire seat bore.

[0019] Furthermore, the inner diameter of the positioning slider is set to a stepped platform that matches the bolt head portion of the fastening bolt. A horizontal platform is set at the inner diameter position of the positioning slider that is flush with the upper end face of the bolt head. The lower end of the dustproof reset cover plate abuts against the horizontal platform of the positioning slider, and the upper end face of the dustproof reset cover plate is flush with the upper end face of the positioning slider.

[0020] Furthermore, the outer diameter of the dustproof reset cover plate is perfectly fitted to the inner diameter of the upper part of the positioning slider platform.

[0021] When the spring is initially uncompressed, the positioning slider of the positioning fixture has a certain extension height relative to the upper plane of the tire seat. At this time, the upper surface of the inner bottom surface of the positioning slider is in contact with the lower end face of the bolt head of the fastening bolt. However, when force is applied to the positioning fixture during the cage processing, the positioning slider descends, compressing the spring and causing deformation. At this time, the upper surface of the inner bottom surface of the positioning slider is separated from the lower end face of the bolt head of the fastening bolt. The downward movement of the positioning slider compresses the positioning slider of the positioning fixture into the tire seat, thus forming the telescoping function of the positioning fixture of the present invention.

[0022] The beneficial effects of using the processing technology of the present invention are:

[0023] The entire machining process is optimized and positioning fixtures are used. The countersunk hole of the cage seat is used as the positioning reference to machine the countersunk hole of the cage cover, and the rivet hole is machined in conjunction with the cage seat cover. The workpiece does not deform during the drilling of the countersunk hole of the cage seat and can be directly used as the positioning reference for the next step. At the same time, the deburring and shaping processes in the traditional process are eliminated, saving production time, reducing the uncertainty of product quality caused by the added process, reducing production costs, reducing the labor intensity of operators, and improving work efficiency. Attached Figure Description

[0024] Figure 1 This is a structural diagram of the positioning tooling used in the present invention.

[0025] Figure 2 This is a schematic diagram of the countersinking of the cage seat in process one.

[0026] Figure 3 The diagram shows the process of machining the countersunk holes of the cage cover and the rivet holes of the cage cover in step two, using the countersunk holes of the cage seat as the positioning reference.

[0027] In the diagram: 1. Carrier seat; 1.1. Inner hole; 2. Compression spring; 3. Fastening bolt; 4. Dustproof sealing ring; 5. Positioning slider; 6. Dustproof reset cover plate; 7. Upper surface of carrier seat; 8. Cage seat; 9. Countersunk hole to be machined for cage seat; 10. Rivet holes to be machined for cage seat and cover; 11. Cage cover; 12. Countersunk hole to be machined for cage cover; 13. Upper surface of the inner bottom of positioning slider; 14. Lower end face of bolt head portion of fastening bolt. Detailed Implementation

[0028] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] like Figure 1-3 The manufacturing process for the split cylindrical roller cage shown includes the following steps:

[0030] Step 1: Position the cage seat 8 on the positioning fixture and drill the countersink hole 9 in the cage seat;

[0031] Step 2: Using the countersunk hole 9 of the cage seat processed in Step 1 as the positioning reference, drill the countersunk hole 12 of the cage cover, drill the matching rivet holes 10 of the cage seat and cover, remove the cage cover 11 and mill the pocket hole of the cage seat 8.

[0032] The positioning fixtures used in the above processing technology are of a telescopic structure;

[0033] The positioning fixture includes: a tire seat 1, a positioning slider 5, a fastening bolt 3, a compression spring 2, a dustproof sealing ring 4, and a dustproof reset cover plate 6; the upper surface 7 of the tire seat has an inner hole 1.1 for accommodating the positioning slider 5, and the positioning slider 5 is fitted with a fastening bolt 3 inside, the head of the fastening bolt 3 passing through the positioning slider 5 and fixedly connected to the tire seat 1; a compression spring 2 is sleeved on the outer diameter of the fastening bolt 3 below the positioning slider 5, the upper end of the compression spring 2 abutting against the lower end face of the positioning slider 5, and the lower end abutting against the lower bottom surface of the inner hole 1.1 of the tire seat; a dustproof sealing ring 4 is also provided between the outer diameter of the positioning slider 5 and the inner wall of the tire seat 1;

[0034] Furthermore, the inner diameter of the positioning slider 5 is set to a stepped platform that matches the bolt head portion of the fastening bolt 3. A horizontal platform is set at the inner diameter position of the positioning slider 5, which is flush with the upper end face of the bolt head. The lower end of the dustproof reset cover 6 abuts against the horizontal platform of the positioning slider 5, and the upper end face of the dustproof reset cover 6 is flush with the upper end face of the positioning slider 5.

[0035] When the spring is not initially compressed, the positioning tooling has a certain extension height relative to the upper plane 7 of the tire seat. At this time, the upper surface 13 of the bottom surface inside the positioning tooling is in contact with the lower end face 14 of the bolt head part of the fastening bolt. However, when force is applied to the positioning tooling during the cage processing, the positioning tooling 5 moves downward to compress the spring 2 and deforms. At this time, the upper surface 13 of the bottom surface inside the positioning tooling is separated from the lower end face 14 of the bolt head part of the fastening bolt.

[0036] The countersunk hole 9 processed in step one is located on the bottom surface of the retainer seat 8. The side opposite to the bottom surface is the top surface. When processing the countersunk hole 9 on the bottom surface of the retainer seat, the top surface of the retainer seat 8 will press against the positioning fixture and push the positioning fixture downward. That is, the positioning slider 5 of the positioning fixture is compressed into the base 1. This does not affect the relative position of the retainer seat 8 and the base 1 in the fixed axial direction. The upper surface 13 of the bottom surface inside the positioning slider is separated from the lower end surface 14 of the bolt head part of the fastening bolt.

[0037] Furthermore, in process two, the countersunk hole 12 of the cage cover is processed by flipping the bottom surface of the cage seat from process one, so that the processed countersunk hole 9 is aligned and positioned with the positioning fixture; this fixes the relative circumferential position of the cage seat 8 and the fixture 1; at this time, the top surface of the cage seat 8 faces upward and fits the cage cover 11, thereby completing the processing of the countersunk hole 12 of the cage cover.

[0038] Furthermore, in the second process, when the retainer seat and cover are fitted with rivet holes 10, the drill bit is inserted downwards through the countersunk hole 12 of the retainer cover for machining until the drill bit reaches the position of the positioning fixture and presses the positioning fixture downwards; the drill bit can press the dustproof reset cover plate 6 on the positioning slider 5 downwards, and the stroke space can be used as a machining empty tool.

Claims

1. A manufacturing process for a split-type cylindrical roller cage, characterized in that, Specifically, the following procedures are included: Step 1: Position the cage holder on the positioning fixture and drill countersunk holes in the cage holder; Step 2: Using the countersunk hole of the cage seat processed in Step 1 as the positioning reference, drill the countersunk hole of the cage cover, drill the matching rivet holes of the cage seat and the cage cover, remove the cage cover and mill the pocket hole of the cage seat. The countersunk hole processed in step one is located on the bottom surface of the cage base. The side opposite to the bottom surface is the top surface. When processing the countersunk hole on the bottom surface of the cage base, the top surface of the cage base will press against the positioning fixture and push the positioning fixture downward. When drilling the countersunk hole for the retainer cover in step two, the bottom surface of the retainer seat from step one is flipped over so that the machined countersunk hole is aligned and positioned with the positioning fixture; at this time, the top surface of the retainer seat faces upward and fits the retainer cover, thereby completing the countersunk hole machining of the retainer cover. In step two, when drilling the rivet holes for the cage seat and cage cover, the drill bit is inserted downwards from the countersunk hole of the cage cover for machining until the drill bit reaches the position of the positioning fixture and presses the positioning fixture downwards. The positioning fixture includes: a tire seat, a positioning slider, a fastening bolt, a compression spring, a dustproof sealing ring, and a dustproof reset cover plate; the upper surface of the tire seat has an inner hole for accommodating the positioning slider, and a fastening bolt is fitted inside the positioning slider. The head of the fastening bolt passes through the positioning slider and is fixedly connected to the tire seat. A compression spring is fitted on the outer diameter of the fastening bolt below the positioning slider. The upper end of the compression spring abuts against the lower end face of the positioning slider, and the lower end abuts against the bottom surface of the inner hole of the tire seat; a dustproof sealing ring is also provided between the outer diameter of the positioning slider and the inner wall of the tire seat; When the spring is not initially compressed, the positioning tooling has a certain extension height relative to the upper plane of the tire seat. At this time, the upper surface of the bottom surface inside the positioning tooling is in contact with the lower end face of the bolt head of the fastening bolt. However, when force is applied to the positioning tooling during the cage processing, the positioning tooling descends and compresses the spring to generate deformation. At this time, the upper surface of the bottom surface inside the positioning tooling is separated from the lower end face of the bolt head of the fastening bolt.

2. The processing technology for the split cylindrical roller cage according to claim 1, characterized in that: The positioning fixture used is a telescopic structure.

3. The processing technology for the split cylindrical roller cage according to claim 1, characterized in that: The outer diameter of the positioning slider matches the inner diameter of the tire seat bore, and the inner diameter of the dustproof sealing ring matches the outer diameter of the positioning slider.

4. The processing technology for the split cylindrical roller cage according to claim 1, characterized in that: The inner diameter of the positioning slider is set to a stepped platform that matches the bolt cap of the fastening bolt. A horizontal platform is set at the inner diameter position of the positioning slider that is flush with the upper end face of the bolt cap. The lower end of the dustproof reset cover plate abuts against the horizontal platform of the positioning slider, and the upper end face of the dustproof reset cover plate is flush with the upper end face of the positioning slider.

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