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Precise ceramic bearing and machining process thereof

A processing technology and technology of precision ceramics, applied in the direction of bearing components, shafts and bearings, mechanical equipment, etc., can solve the problems of rotational speed, temperature rise, unsatisfactory service life, etc., to shorten the production cycle, reduce the machining process, and reduce the friction coefficient. Effect

Inactive Publication Date: 2012-08-15
李东炬
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AI Technical Summary

Problems solved by technology

The rolling elements of ordinary precision bearings are generally steel, and their speed, temperature rise, and life cannot meet the requirements of current high-speed machine tools

Method used

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  • Precise ceramic bearing and machining process thereof
  • Precise ceramic bearing and machining process thereof

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Embodiment Construction

[0019] A precision ceramic bearing and its processing technology. The bearing mainly includes an inner ring, an outer ring, a rolling body and a cage. The rolling body is installed in the pocket of the cage. The inner ring is located inside the rolling body, and the outer side is located at the The outer side forms a whole, which is characterized in that the rolling elements are made of Si 3 N 4 Silicon nitride material with a density of 3.18-3.3 grams per cubic centimeter. The processing steps of precision ceramic bearings are as follows:

[0020] a. Processing procedure of inner ring and outer ring:

[0021] 1) Forming: CNC lathe is used to process the blank into a ring shape;

[0022] 2) Cold rolling: basically process and shape the ferrule;

[0023] 3) Heat treatment and cryogenic treatment: the heat treatment quenching hardness is HRC60-63, and the cryogenic temperature is controlled at minus 60°C to minus 90°C;

[0024] 4) Grinding: Grinding the plane, outer diamete...

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Abstract

The invention relates to a ceramic ball bearing, particularly relates to a precise ceramic bearing and a machining process thereof and belongs to the field of bearings and machining thereof. According to the precise ceramic bearing and the machining process thereof, a rolling body utilizes a silicon nitride ceramic material, the density is reduced, the centrifugal force is reduced by more than 40%, the limited rotating speed is improved by more than 30% and the service life of the bearing is prolonged by more than 50%. Meanwhile, the silicon nitride ceramic material has the advantages of small friction coefficient, strong self-lubricating capability, wear resistance, high-temperature resistance and the like. Furthermore, a sleeve ring machining process adopts cold rolling and the effect of the cold rolling procedure reduces a lathing procedure, shortens the production cycle, improves the production efficiency and reduces the consumption of raw materials. If the precise ceramic bearing is manufactured by a common cutting machining process, the utilization rate of materials is commonly 40-50%, but if the precise ceramic bearing is manufactured by a cold rolling method, the material utilization rate can reach 70-80%.

Description

technical field [0001] The invention relates to a ceramic ball bearing, in particular to a precision ceramic bearing and its processing technology, belonging to the field of bearings and its processing. Background technique [0002] Rolling bearing is a precision mechanical element that changes the sliding friction between the running shaft and the shaft seat into rolling friction, thereby reducing friction loss. Rolling bearings generally consist of outer rings, inner rings, rolling elements and cages. With the rapid development of numerical control technology, "composite, high-speed, intelligent, and precise" has become the mainstream trend of today's machine tool industry technology development, because high-speed machining can improve processing efficiency, shorten processing cycle, and save processing energy consumption. For modern high-speed processing machine tools, the spindle speed is required to reach tens of thousands to hundreds of thousands of revolutions per mi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C33/32F16C33/00
Inventor 李东炬
Owner 李东炬
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