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1, the center offset method
   

(1) TIMKEN thrust ball bearing ring inner, outer diameter rescue
   

First part exists at each defect (asymmetric) sizes accurately measured, calculated wherein the minimum grinding amount (grinding) to the finished size deviation M, and then grinding the parts for the center offset ( toward the direction of the defect increases the grinding capacity offset), the maximum offset of M / 2, i.e. the defect is relatively increased grinding capacity, focusing grinding.
   

(2) of the ferrule, outer raceway rescue
   

TIMKEN thrust ball bearing ring grinding design basis for ID or OD (outside) diameter after that first grinding grinding raceway, circle example, if the inner raceway asymmetric type defects, you need to The accurate measurement of the inner diameter dimension of the part, and calculate the maximum grinding capacity M, and the inner raceway defect at the maximum grinding capacity M1. M1 with center offset method of grinding is carried out to ensure the parts hardness carburized layer depth premise, the total offset can not be completed in an offset grinding is generally divided into several grinding through partial The shift test grinding - measurement - to adjust the offset - try the repeated process of grinding to complete, until the defects worn, re-alignment, the normal grinding corrected ovality. Lower the efficiency of this method, and requires the operator to have a higher level of technology, but in a higher success rate using this method to save a stand-alone, single-piece production, not to delay the production schedule. Verified after a few years of practice to good effect.
   

2, the chemical deposition method
   

TIMKEN thrust ball bearings parts beyond the design standards for dimensional tolerances, chemical deposition method can be used to save. The principle of the chemical deposition through a variety of chemical reaction between the chemical raw material, evenly generated surface of the part of a certain thickness of the metal plating layer, by attaching tempered to ensure hardness and mechanical properties of the metal layer and the original parts. Chemical deposition only increases the size of the parts, does not change the shape of the tolerances of the parts, so for dimensional tolerances tolerance parts, using chemical deposition is an effective method of rescue, at present, the maximum unilateral deposition thickness of up to about 0.1mm.
   

3, heat treatment up Method
   

TIMKEN thrust ball bearing steel quenching organizations quenched martensite, a small amount of undissolved secondary carbides, and about 12% to 14% of retained austenite. Quenched martensite and residual austenite is unstable tissue, the decomposition of the martensite in tempering process of the steel volume shrinkage, and the decomposition of the residual austenite volume swell of the steel.