Production process of high-precision ball bearing ring
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A production process and ball bearing technology, applied in metal rolling and other directions, can solve the problems of low precision of ball bearing rings, low material utilization rate, low production efficiency, etc., to save raw materials, improve internal quality, and improve production efficiency. Effect
Inactive Publication Date: 2011-11-23
李东炬
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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
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[0007] A production process of high-precision ball bearing rings, using machine tools to process blanks into rings; performing cold rolling and expanding technology to basically shape the rings; heat treatment and cryogenic treatment: heat treatment quenching hardness HRC60-63, cryogenic temperature control At minus 60°C to minus 90°C; the workpiece after the cold rolling and expanding process is subjected to initial grinding and fine grinding, and the plane, outer diameter, inner hole, and groove of the ferrule are ground to achieve the dimensional accuracy of the part; finally In the superfine grinding process, the groove of the bearing ring is superfinely ground to reduce the roughness of the groove and improve the roundness of the groove, and the roughness is less than 0.015Ra.
[0008] The cold rolling process is adopted, and the function of the cold rolling is to reduce the turning process, shorten the production cycle, improve the production efficiency and reduce the con...
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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...
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