Machining technology for alloy steel separation type solid retainer

A solid cage and processing technology technology, applied in the field of machining, can solve the problems of unstable inner and outer diameters of the cage, poor machining accuracy of the outer and inner diameters of the cage, unqualified roughness of the cage, etc. Dimensional stability, avoiding chipping, and improving the effect of mutual difference between pockets

Active Publication Date: 2017-03-15
AVIC HARBIN BEARING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problem that the surface roughness of the outer diameter and inner diameter of the cage is unqualified, the machining accuracy of the outer diameter and inner diameter of the cage is poor, and the dimensions of the inner and outer diameters of the cage are unstable problem, and then provides a processing technology of alloy steel separation solid cage

Method used

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  • Machining technology for alloy steel separation type solid retainer
  • Machining technology for alloy steel separation type solid retainer
  • Machining technology for alloy steel separation type solid retainer

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specific Embodiment approach 1

[0044] Specific implementation mode one: combine Figure 1 to Figure 11 Describe this embodiment, the processing technology of a kind of alloy steel separation type entity cage of this embodiment, the steps are as follows:

[0045] 1. Car forming: the cage adopts forgings or bars for feeding and processing, the forgings are ring-shaped workpieces, and the bars are cylindrical workpieces;

[0046] a) When using forgings for feeding processing, the workpiece is first rough-turned into shape, then quenched and tempered, and finally fine-turned into shape. The specific method is:

[0047] 1. First, the two ends of the workpiece, the inner diameter, the outer diameter, and the chamfered inner and outer corners are rough-turned. The size of the workpiece obtained after rough turning is the machining allowance left for the finished cage: outer diameter allowance 1.5-1.6mm, inner diameter allowance 1.1 ~ 1.3mm, end face allowance 0.7 ~ 0.8mm, and then quench and temper the workpiece ...

specific Embodiment approach 2

[0070] Specific implementation mode two: combination Figure 11 To illustrate this embodiment, the cage with an outer diameter ≤ 40 mm is processed by bar feeding, and the cage with an outer diameter > 40 mm and inner diameter ≥ 30 mm is processed by forging. With such a design, if the size of the workpiece is too small, forgings cannot be made, and only bar stock can be used. The advantages of forgings can eliminate internal defects of parts or blanks; forgings have good shape and dimensional stability, and have high comprehensive mechanical properties; the biggest advantages of forgings are good toughness, reasonable fiber structure, and small performance changes between forgings. Other compositions and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0071] Embodiment 3: The drill bit selected in step 3 is a cobalt-containing high-speed steel drill bit with a diameter ranging from 2 to 2.05 mm. With this design, the alloy steel material is hard and sticky, and the hardness reaches 37-38HRC after quenching and tempering treatment. The rivet hole processing belongs to deep hole processing, and the processing depth of the hole is 7-8 times the diameter of the hole. It is easy to fold the drill bit during processing. The drill bit made of cobalt material has the characteristics of high temperature resistance and wear resistance. It has good toughness and sharp cutting edge, which can avoid the generation of sticky chips and built-up edge. materials and difficult-to-process materials. Other compositions and connections are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses a machining technology for an alloy steel separation type solid retainer, and belongs to the technical field of machining. The machining technology solves the problems that according to an existing machining technology for an alloy steel separation type solid retainer, the roughness of the outer diameter surface and the inner diameter surface of the retainer is disqualified, the machining precision of the outer diameter and the inner diameter of the retainer is poor, and the inner diameter size and the outer diameter size of the retainer are not stable. The machining technology comprises the following steps of turning forming, uniform grinding of two end faces, rivet hole drilling, pin inserting, mark punching, outer diameter grinding, inner diameter final turning and chamfering, hole drilling and milling, deburring, pin dismounting, cavity milling, second rivet hole chamfering, bright polishing, cleaning, flaw detection, final inspection, silver plating and packaging. The machining technology is used for machining the alloy steel separation type solid retainer.

Description

technical field [0001] The invention relates to a processing technology of a bearing cage, which belongs to the technical field of mechanical processing. Background technique [0002] Rolling bearings have a high rated speed and a long service life, and are a type of high-precision bearings, especially deep groove ball bearings, which are the most widely used type of rolling bearings. As one of the main components of the bearing, the cage has higher and higher requirements on its machining accuracy. Especially for the alloy steel separate solid cage, its processing technology directly affects its precision. [0003] The conventional process flow of the existing alloy steel separate solid cage is: rough turning forming → quenching and tempering → thin turning forming → drilling rivet holes (ordinary drilling machine) → inverted rivet hole corners → pins → marking → drilling → reaming Hole (ordinary drilling machine)→grinding outer diameter→finishing inner diameter→chamferin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 曹阳张凯锐王涛刘颖志薛雪徐雷孙慧广廖子华佐景涛张翔杜杰孙怀全范继承武伟高强石广超
Owner AVIC HARBIN BEARING
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