Manufacturing process of high-speed precision bearing steel ball

Abstract

The invention discloses a manufacturing process of a high-speed precision bearing steel ball. The high-speed precision bearing steel ball is made of mould casting GCr15 vacuum degassing refining bearing steel as a raw material. The raw material is subjected to ball billet forming, ball polishing, heat treatment, ball milling, surface reinforcing, preliminarily grinding, flaw detection, fine grinding, super fine grinding, cleaning, rust prevention and package to obtain a finished product. The ball billet forming comprises two working procedures, i.e. lightly pulling the raw material and automatically cutting and cold forging and forming. The manufacturing process is characterized in that the raw material is lightly pulled before the ball billet forming process is carried out, the diameter of the material which is lightly pulled is reduced by 0.2-0.3 mm and then cold forging is carried out; and in the working procedure of cold forging, the compression ratio of the raw material is controlled to be between 1.9 and 2.5, the formed ball billet is in a state of no annular belt or a micro annular belt and does not have two obvious pole posts. The invention has the advantages that the high-speed precision bearing steel ball with high precision, low noise, stable quality and no surface defects can be produced by using the process.

Description

technical field [0001] The invention relates to a production process of steel balls, in particular to a method of using metal as the material to carry out ball blank forming, light balls, heat treatment, grinding balls, surface strengthening, preliminary grinding, flaw detection, fine grinding, super fine grinding, Cleaning, final anti-rust packaging into finished products process to produce high-speed precision bearing steel ball manufacturing process. Background technique [0002] The high-speed precision bearing steel balls currently on the market have low precision, high noise, and unstable quality due to the materials used and ordinary manufacturing processes, and because there is no application of surface strengthening technology, there are defects on the surface, which seriously affects the steel balls. pass rate and product life. Contents of the invention [0003] The main task of the present invention is to provide a high-speed and high-precision bearing steel ba...

AI Technical Summary

Problems solved by technology

[0002] The high-speed precision bearing steel balls currently on the market have low precision, high noise, and unstable quality due to the materials used and ordinary manufacturing processes, and because there is no application of surface strengthening technology, there are defects on the surface, which seriously affects the steel balls. The qualification rate and product service life