The method of pairing bearings without grinding

Abstract

The invention discloses a bearing pairing grinding-free method comprising the steps: 1) calculating the maximum value Tmax and the minimum value Tmin of the total height of bearings after fitting; 2) firstly calculating the maximum value alphamax and the minimum value alphamin of a contact angle of a bearing set; then calculating the maximum value aemax and the minimum value aemin of a bearing outer ring groove; 3) after calculating the maximum value aemax and the minimum value aemin of the bearing outer ring groove, according the tolerance ranges of the above known values, through grinding inner rings and outer rings of the bearings with a grinding machine and keeping the data within the tolerance ranges of the above known values, measuring the bearings suitable for fitting through measurement blocks, measuring the distribution range of projection values of the bearings, and performing fine adjustment according to the deviation between the measured results and set targets so that the assembly technological process is finished. The bearing pairing grinding-free method has the advantages of simple and efficient pairing process, time and labor saving, and high pairing efficiency.

Description

technical field [0001] The invention relates to a grinding-free method for paired bearings. Background technique [0002] Angular contact ball bearings can bear radial loads and axial loads at the same time, and are usually installed in pairs in applications. With the rapid development of the machine tool industry, the market for preloaded ultra-precision paired angular contact bearings for machine tool spindles is huge. The so-called protruding amount of assembly refers to the distance that the end face of the inner ring protrudes from the end face of the outer ring at the same end face of the bearing after the bearing bears a certain axial preload. When the base surface of a single bearing protrudes from another set of base surfaces, the protrusion amount is taken as +, and when it is recessed, the protrusion amount is taken as - value. So from a certain point of view, the universal paired bearing is actually selected with a suitable protrusion and assembled within the r...

AI Technical Summary

Problems solved by technology

[0004] The above methods have disadvantages. The first method requires the bearing to be disassembled, which may easily cause scratches on the ring groove and the steel ball. In addition, the existence of the height dispersion of the ring before the grinding plane and the machining error during grinding will make the reassembly The measured value of the bearing protrusion of the sleeve deviates from the target value more or less, and cannot be completely selected and matched. A small part of the bearings need to be disassembled twice or more to achieve the purpose; the second method does not need to dismantle the sleeve, but The processing and matching efficiency is very low, and the power consumption of a single set of bearings is relatively high

A single set of bearings is measured multiple times on the protrusion gauge. Due to the multiple impacts of the measurement load, it is easy to cause bumps on the parts

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