Production process of high-precision ball bearing ring

Abstract

The invention discloses a production process of a high-precision ball bearing ring and belongs to the technical field of machine manufacturing. The process comprises the following steps of: machining a blank into a ring by use of a machine tool; performing cold-rolling expansion treatment to primarily shape the ring; performing heat treatment and cryogenic treatment under such conditions that the quenching hardness of heat treatment reaches the level HRC60-63 and the cryogenic temperatures is controlled within the range of minus 60 DEG C to minus 90 DEG C; after cold-rolling expansion treatment, performing raw grinding treatment and fine grinding treatment on the planes, outer circumference, inner cavity and channels of the ring until the dimensional precision of a component is reached; and finally performing ultra-fine grinding treatment on the channels of the bearing ring so as to reduce the roughness of the channels, improve the roundness of the channels and ensure that the roughness is less than 0.015 Ra. According to the invention, the production process is simple, the production period is shortened, and the production efficiency is increased; and besides, the cold-rolling expansion treatment ensures that the fatigue resistance and precision of the bearing ring are improved, so that the service life of the bearing ring is longer.

Description

technical field [0001] The invention relates to a production process of a ball bearing ring, in particular to a production process of a high-precision ball bearing ring applied under high-speed operating 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. Now the more common process of producing ball bearing rings includes turning (plane, outer diameter, inner hole, groove, eight chamfers), heat treatment, grin...

AI Technical Summary

Problems solved by technology

Now the more common process of producing ball bearing rings includes turning (plane, outer diameter, inner hole, groove, eight chamfers), heat treatment, grinding (plane, outer diameter, inner hole, groove), The groove is super-precision, the whole process is mainly due to the cumbersome lathe processing, and the precision of the processed ball 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