Silicon nitride ceramic ball bearing and processing method thereof

Abstract

The invention relates to a silicon nitride ceramic ball bearing and a processing method thereof, which are used for precise and high-speed machine tool spindles. A groove is arranged between an inner ring and an outer ring of the bearing, and a rolling body is arranged in a window of a holding frame and embedded in the groove between the outer ring and the inner ring, wherein the center of the inner ring is provided with a hole; the rolling body is made of silicon nitride ceramics; both end faces between the outer ring and the inner ring are provided with a multi-lip and multi-cavity sealing ring, and a dust-proof cover is arranged outside the sealing ring; the holding frame is made of high-rigidity engineering plastics; and the dust-proof cover is made of a magnetic material. A silicon nitride ceramic ball is adopted to replace a traditional steel ball and used as the rolling body of the bearing, and an advanced superaudio frequency surface quenching heat treatment technology is adopted, thus the bearing has small density, small elastic deformation after stressing, high relative load rigidity and smaller thermal expansion coefficient, friction coefficient and heat generated during working. At the same time of improving the ball precision, the invention improves the groove precision of the inner ring and the outer ring and the size precision of a holder. Through the high precision of the bearing, the spindle rotation precision of a machine tool can be improved, and the quality of precise part surfaces and mould cutting surfaces can also be improved.

Description

Technical field [0001] The invention relates to a high-precision bearing in the technical field of mechanical transmission, in particular to a silicon nitride ceramic ball bearing used for a precision and high-speed machine tool spindle and a processing method thereof. Background technique [0002] Bearings are the basic accessories of modern machine tools and the cornerstone of machine tool machining accuracy. Precision and surface quality of parts. In traditional machinery or general machinery, the speed is mainly from several hundred to several thousand revolutions per minute. With the rapid development of numerical control technology, "composite, high-speed, intelligent, precision, and environmental protection" has become the main trend of the development of machine tool industry technology, because high-speed machining can effectively improve the machining efficiency of machine tools and shorten the processing cycle of workpieces. For modern high-speed processing mach...

AI Technical Summary

Problems solved by technology

Due to the high precision, high speed, and high reliability requirements of machine tool spindle bearings, there are some special requirements for rolling element materials, while the speed and temperature rise, life and load capacity, stiffness, vibration resistance, and noise of general bearing steel rolling element bearings Cannot meet the requirements of modern machine tools

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