High precision hot press silicon nitride ceramic ball bearing and its manufacturing method

A technology of silicon nitride ceramic balls and manufacturing methods, which is applied in the direction of ball bearings, manufacturing tools, bearing components, etc., can solve the problems that high-precision ceramic bearings cannot be purchased, hot-pressed silicon nitride materials are difficult to process hard and brittle materials, etc.

Active Publication Date: 2008-01-30
SHENYANG JIANZHU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since the hot-pressed silicon nitride material is a hard and brittle material that is extremely difficult to process, the current international market can only provide limited ceramic balls below grade 10.
G5 and G3 ceramic balls are nowhere to be purchased, and the corresponding high-precision ceramic bearings are also unavailable

Method used

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  • High precision hot press silicon nitride ceramic ball bearing and its manufacturing method
  • High precision hot press silicon nitride ceramic ball bearing and its manufacturing method
  • High precision hot press silicon nitride ceramic ball bearing and its manufacturing method

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Embodiment Construction

[0063]The specific technical solutions of the present invention will be further described below in conjunction with embodiments:

[0064] The high-precision hot-pressed silicon nitride ceramic ball bearing shown in Figures 1 to 4 includes: an inner ring 2 and an outer ring 1 made of steel. The inner ring 2 and the outer ring 1 respectively have two facing each other. One of the arc raceways 5 and 6; a number of ceramic ball rolling elements 3 arranged between and in contact with the raceways 5 and 6 of the inner and outer rings; one set between the inner and outer rings 1, 2 In order to maintain the ceramic ball rolling element 3 rolling element isolation ring, that is, the cage 4. The ball bearing is of angular contact type, that is to say, the outer ring 1 and the inner ring 2 respectively have a respective outer raceway 5 and an inner raceway 6, which face each other with their concave surfaces facing each other. In this example , The outer ring 1 has a lock, which makes the be...

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Abstract

A heat pressing silicon nitride ceramics ball bearing with high precision and a method for manufacture same belong to the bearing production technology, which is suitable for installation at a numerically controlled machine with high precision, high rotary speed and top grade and at a machining center principal shaft. The heat pressing silicon nitride ceramics ball bearing with high precision in accordance with the present invention comprises an inner ring and an outer ring made from steel, with each respectively being equipped with a ball bearing circular arc rollaway nest; a ceramic ball rolling body set between the ball bearing rollaway nests of the inner and outer rings; a rolling body spacing ring, or a retainer, mounted between the inner and outer rings and used for holding the ceramic ball; and is characterized in that said ceramic ball rolling body is obtained through a conical contour grinding process and technical equipment, with the accuracy thereof achieving G5 and G3. The present invention is characterized as follows: the extreme operational speed is high; the running accuracy is high; it is high temperature resistant and is suitable for running dry; the weight is light; it can work stably at a high-corrosivity medium for a long time; the standardize degree is high, it is convenient to maintain and interchange.

Description

Technical field [0001] The invention relates to a high-precision angular contact ball bearing, in particular to a high-precision hot-pressed silicon nitride ceramic ball bearing and a manufacturing method thereof, belonging to bearing manufacturing technology, and suitable for installation on high-precision, high-speed, high-end CNC machine tools And on the spindle of the machining center. Background technique [0002] The CNC machine tool is an important basic equipment of the national economy, and it reflects the comprehensive strength of a country. The core support of the CNC machine tool spindle is a high-speed precision ball bearing. The steel ball rolling elements in the ball bearing are held laterally by a steel cage, and the steel balls are arranged in the raceways of the inner and outer rings that are also made of steel. The main disadvantage of these known bearings is the limited life span at high speeds. This is because the poor performance of the frictional surface ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C19/06F16C33/32F16C33/62F16C33/44F16C33/64B24B11/06
Inventor 吴玉厚张珂
Owner SHENYANG JIANZHU UNIVERSITY
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