Processing method for inner-ring-free cylindrical roller bearing alloy steel solid retainer

A technology of cylindrical roller bearings and solid cages, applied in the field of bearings, can solve problems such as substandard roughness of machining precision pockets, cracks on rolling surfaces, etc., to avoid breakage of broaches, stabilize machining dimensions, and improve geometric accuracy and the effect of dimensional accuracy

Inactive Publication Date: 2019-03-22
AVIC HARBIN BEARING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the machining accuracy and the surface roughness of the pocket hole of the bearing cage are not up to standard after adopting the existing processing procedure of the bearing cage, and the problem that cracks appear on the rolling surface during the process of rolling the lock mouth, the present invention provides A processing method for alloy steel solid cage of cylindrical roller bearing without inner ring

Method used

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  • Processing method for inner-ring-free cylindrical roller bearing alloy steel solid retainer
  • Processing method for inner-ring-free cylindrical roller bearing alloy steel solid retainer
  • Processing method for inner-ring-free cylindrical roller bearing alloy steel solid retainer

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specific Embodiment approach 1

[0019] Specific implementation mode one: combine Figure 1-Figure 6 To illustrate this embodiment, a method for processing an alloy steel solid cage of a cylindrical roller bearing without an inner ring in this embodiment includes the following steps:

[0020] Turning, quenching and tempering, rough grinding of outer diameter, fine turning of both ends, fine turning of inner diameter, uniform grinding of both ends, final grinding of outer diameter, final grinding of inner diameter, turning of inner steps, marking, drilling, milling of square holes, square drawing Hole, deburring, cleaning, stress relief annealing, finishing, roll lock, dynamic balancing, magnetic particle inspection, silver plating, final inspection and packaging processes.

[0021] The following takes the implementation of a certain type of bearing cage made of 40CrNiMoA as an example:

[0022] Step 1: Car forming: turning the inner diameter d to The height dimension S is turned to 23.6-23.7mm, and the out...

specific Embodiment approach 2

[0047] Specific Embodiment 2: The preheating temperature of stress relief annealing in the process of this embodiment is 150±5°C, the preheating time of stress relief annealing is 120±10min, and the final heating temperature of stress relief annealing is 550±5°C.

[0048] Other compositions and connections are the same as in the first embodiment.

specific Embodiment approach 3

[0049] Specific implementation mode three: combination figure 1 To illustrate this embodiment, the process of this embodiment leaves a machining allowance of 0.15-0.25 mm for milling a square hole.

[0050] This setting ensures the accuracy of the subsequent square hole. If the margin is too large, the pocket hole accuracy and surface roughness cannot be guaranteed. If the margin is too small, the milling tool marks during the square hole milling process cannot be completely removed. , can not meet the process requirements.

[0051] Other compositions and connections are the same as those in the second embodiment.

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Abstract

The invention discloses a processing method for an inner-ring-free cylindrical roller bearing alloy steel solid retainer, and relates to the technological field of bearings. The problems that after anexisting bearing retainer processing process, the working accuracy of a pocket hole of the bearing retainer and the surface roughness of the pocket hole do not reach the standard, and rolling surfacecan generate cracks in the lock opening rolling process are solved. The processing method comprises the following processes of lathe forming, hardening and tempering, rough grinding of the outer diameter, fine lathing of the two end faces, fine lathing of the inner diameter, even grinding of the two end faces, final grinding of the outer diameter, final grinding of the inner diameter, turning ofinner steps, marking, drilling, milling of square holes, pulling of the square holes, deburring, cleaning, stress relief annealing, glazing, lock opening rolling, dynamic balancing, magnetic powder inspection, silver plating, final inspection and packaging. According to the processing method, stress relief annealing is carried out before lock opening rolling is carried out, and the cracks generated by machining stress superposition and a surface cold hardening layer on the rolling surface are avoided. The processing method is suitable for processing the inner-ring-free cylindrical roller bearing alloy steel solid retainer.

Description

technical field [0001] The invention relates to the technical field of bearings, in particular to a method for processing a bearing cage. Background technique [0002] Cylindrical roller bearings are a widely used type of rolling bearings. The cylindrical rollers and raceways are linear contact bearings with large load capacity and mainly bear radial loads. This type of bearing is suitable for high-speed rotation and is mainly used in main shaft aero-engine bearings. As one of the important components of the bearing, the cage has higher and higher requirements for its design structure and machining accuracy. [0003] The existing processing steps of the bearing cage are: forming, rough grinding outer diameter, rough turning first plane, rough turning second plane, rough turning inner diameter, quenching and tempering, fine grinding outer diameter, fine turning first plane, fine turning second plane Two planes, manual marking, fine turning inner diameter, drilling, drawing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 曹阳于清成唐双晶薛雪张翔纪春华于寒刘新强高强杜杰苏海宇金宏宇张宇张宏乔范继承王德军王雷毕立行
Owner AVIC HARBIN BEARING
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