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Manufacturing method of precision ball bearing cage

A manufacturing method and cage technology, which are applied in the field of bearing manufacturing, can solve the problems of large running noise, large synchronous current changes, and low qualification rate of bearing installation batches, etc., and achieve the effects of improving performance, improving installation qualification rate and improving performance.

Inactive Publication Date: 2010-02-17
LUOYANG BEARING SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to propose a gyro motor precision ball that can solve the problems of high and low temperature gyro motor bearing running noise, large synchronous current change, low qualified rate of bearing installed batches, and unstable movement of the cage under low temperature. The manufacturing method of the bearing cage, so as to improve the performance of the gyro motor and meet the requirements of the national high-tech project for bearings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0032] Precision ball bearing cage materials for high and low temperature motors in strapdown vertical reference platform flexible gyro motors of a key model;

[0033] 1. Select raw materials; the particle size of polyimide is 150 mesh, the logarithmic viscosity is 135ml / g, and the apparent density is 0.38g / cm 3 , determine the batches of raw materials that can meet this target;

[0034] 2. Raw material pretreatment: pass the polytetrafluoroethylene and tungsten disulfide powder through a 100-mesh sieve, and then use hot air drying at 120°C±2°C to remove moisture;

[0035] 3. Ingredients: Accurately weigh various raw materials according to the weight ratio, stir and mix them in a high-speed mixer 4 times, each time for 15 seconds, then grind the mixture finely with a mortar, grind for 15 minutes, and use a twenty-fold microscope to observe If there is no obvious uneven phenomenon, it is qualified, and it is stored in a dry container for standby;

[0036] 4. Loading: Accurate...

no. 2 example

[0044] A precision ball bearing cage material for a resource satellite gyro motor motor;

[0045] 1. Select raw materials; determine the logarithmic viscosity of polyimide to be 130ml / g, and the apparent density to be 0.35g / cm 3

[0046] 2. The initial pressure is 40MPa, and the pressure is increased to 55MPa after removing the gasket;

no. 3 example

[0048] Precision ball bearing cage material for liquid floating gyro motor motor of a warship;

[0049] 1. The initial pressure is 45MPa, and the pressure is increased to 60MPa after removing the gasket;

[0050] The bearing cage manufactured by the method of the invention has been successfully used in the precision ball bearings for high and low temperature gyro motors in strapdown vertical reference platform flexible gyro motors of a key model. Due to the high speed (20,000 rpm) and demanding performance requirements of this motor (the current change of the gyro motor within the temperature range of 100°C cannot be greater than 1%), it also has high and low temperature performance requirements, and the bearing performance needs to take into account the high temperature of 60°C and low temperature. -40°C, the current range of the gyro motor is not more than 5mA under the condition of -40°C. The bearing cage of the invention fully meets the high and low temperature performanc...

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Abstract

The invention belongs to bearing manufacturing technology, and relates to a manufacturing method of a precision ball bearing of a flexible gyro motor of a reference platform. The technical steps of the cage of the present invention are as follows: selection of raw materials - raw material pretreatment - batching - charging - press molding - sintering - cold and heat cycle treatment - mechanical processing - cleaning and oil immersion. The invention can solve the problems such as high operating noise of gyro motor bearings under high and low temperature conditions, large synchronous current changes, low pass rate of bearing installed batches, and unstable movement of cages at low temperatures. Use under the condition of 100°C (+60°C~-40°C).

Description

technical field [0001] The invention belongs to bearing manufacturing technology, and relates to a manufacturing method of a precision ball bearing of a flexible gyro motor of a reference platform. Background technique [0002] my country's gyro motor bearing technology is basically developed on the basis of independent research and development, and has been well applied in gyro motors with temperature control devices. However, there is no gyro motor bearing suitable for use under the condition that there is no temperature control device and the ambient temperature changes up to 100°C (+60°C~-40°C). The existing bearings generally have low temperature during use under the above conditions Unstable performance, high noise and low installed pass rate, etc., the installed pass rate is only below 20%, which cannot meet the requirements of the host. Therefore, the bearing cage of the gyro motor becomes the main factor affecting the performance of the gyro motor. Contents of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/08B29C43/02C10M107/44F16C33/44
Inventor 王子君王枫葛世东李建星李雪梅王萍
Owner LUOYANG BEARING SCI & TECH CO LTD
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