Surface processing method for self-lubricating joint bearing after hard chromium plating of spherical surface of inner ring of self-lubricating joint bearing

Abstract

The invention provides a surface processing method for a self-lubricating joint bearing after hard chromium plating of the spherical surface of an inner ring of the self-lubricating joint bearing. Thesurface processing method comprises the following steps that S1, a pig iron rod is used for being matched with grinding paste 1 for rough grinding processing; S2, a copper rod is used for being matched with grinding paste 2 for fine grinding processing; and S3, a polishing cloth is used for being matched with grinding paste 3 for polishing processing. Compared with the prior art, the surface processing method has the following beneficial effects that under meeting the requirement of hard chromium plating of the spherical surface of the inner ring of the product, it is ensured that geometricaltolerance such as the size, the roundness, the symmetry degree, the spherical difference and the surface roughness of the bearing meets design requirements, and the appearance precision of the bearing is further improved.

Description

technical field [0001] The invention relates to a method for processing the surface of the spherical surface of the inner ring of a self-lubricating joint bearing after hard chrome plating, and belongs to the technical field of self-lubricating joint bearings. Background technique [0002] Self-lubricating joint bearings are mainly composed of outer rings, inner rings and liners. The friction pair in the bearing is mainly steel and liner rubbing against each other. During the use of self-lubricating spherical plain bearings under working conditions, due to the harsh operating environment, the spherical surface of the inner ring has poor wear resistance and is prone to wear under heavy loads. Lighter wear will cause the axial clearance of the bearing to exceed the standard If the degree of wear is serious, the entire inner ring will be separated from the outer ring and wear and fail prematurely. It can be seen that the wear of the bearing will bring a lot of inconvenience to...

AI Technical Summary

Problems solved by technology

However, during the hard chromium plating process of the inner ring spherical surface, due to the unevenness of the thickness of the spherical hard chromium plating layer, the outer dimensions of the bearing after hard chromium plating will change, especially the spherical difference of the inner ring of the bearing will be greatly affected. At the same time, it will also affect the roughness of the spherical surface, which will lead to a poor fit between the outer ring and the inner ring of the bearing, causing premature wear and failure of the local area of ​​the bearing friction pair, and some even stuck and cannot be used normally.

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