Production process for high-precision roller bearing ring

Abstract

The invention discloses a production process for a high-precision roller bearing ring, which belongs to the technical field of mechanical manufacture. The production process comprises the following steps of: turning a blank into an annular shape by adopting a machine tool; carrying out a cold rolling expansion process and basically processing and forming the ring; carrying out heat treatment and cryogenic treatment; controlling the quenching hardness (Hardness Rockwell) of the heat treatment to be 60-63 and controlling the cryogenic temperature to be -60DEG C to -90DEG C; carrying out preliminary grinding and fine grinding processes on workpieces subjected to cold rolling expansion process; carrying out grinding processing on a plane, the outside diameter, an inner hole and a channel of the ring to reach the size precision of parts; and finally, carrying out an ultra-fine grinding procedure, i.e. carrying out ultra-fine grinding on the channel of the ring, reducing the roughness and improving the roundness of the channel, wherein the roughness of the channel is smaller than 0.015Ra. According to the production process disclosed by the invention, the flow is simple, the production period is shortened and the production efficiency is improved; and after cold rolling and deforming, a grain structure of a metal material is more compact, a metal streamline is unchanged and no cut-off is generated, thus the fatigue resisting strength of the material is improved.

Description

technical field [0001] The invention relates to a production process of a roller bearing ring, in particular to a production process of a high-precision roller bearing ring applied under high-speed operation conditions, and belongs to the technical field of mechanical manufacturing. Background technique [0002] Bearings are widely used in almost all industries of national defense and civilian use such as machinery manufacturing, aerospace, transportation, energy, electric power, mining, metallurgy, construction, chemical industry, IT, and home appliances. Bearings are usually composed of inner and outer rings, rolling elements, and cages, and each of its components should have the characteristics of wear resistance, corrosion resistance, fatigue resistance, impact resistance, high roughness, and high dimensional accuracy. The more common production process of roller bearing rings now includes turning (plane, outer diameter, inner hole, groove, eight chamfers), heat treatmen...

AI Technical Summary

Problems solved by technology

The more common production process of roller bearing rings now includes turning (plane, outer diameter, inner hole, groove, eight chamfers), heat treatment, grinding (plane, outer diameter, inner hole, groove) , The channel is ultra-fine, the whole process is mainly due to the cumbersome lathe processing, and the precision of the processed roller bearing ring is not high, the material utilization rate is low, the production cycle is long, the production efficiency is low, and the manufacturing cost is high