1 center offset method

1.1 pairs of bearing sleeve circle, diameter of the rescue

First there is the part of the defect (asymmetric type) size for accurate measurement, which calculates the minimum amount of grinding (finished size to the amount of deviation of the mill) M, and then grinding the parts center offset (defects increases toward the direction of the offset amount of wear), the maximum offset is M / 2, which increases wear on the relative amount of defects, focusing on grinding.

1.2 pairs of sets of circles, outer raceway rescue

Grinding bearing rings design basis for the ID or OD, that is, first grinding (and beyond) after grinding roller diameter, within the circle, for example, if there is asymmetric inner raceway-type defects, the need to accurately measure the parts diameter size, and calculate the maximum amount of M and the mill raceway defects within the maximum grinding capacity M1. When M1 <M, in the grinding inner diameter center to be offset when the maximum offset of M1 / ??2, which give the processing time within the inner raceway defect relative increase in mill capacity in advance, and then grinding in raceway, its focus will be grinding at the defects, waste can be saved. When M1 ≥ M, the normal grinding mill can not afford, under the circumstances the method can be used to save about 1.1.

Center offset method is used to ensure parts grinding hardness, case depth of the premise, the total offset can not be completed in one shift grinding, grinding is generally divided into several times, that is offset by the test Mill - Measurement - adjust offset - try to complete the grinding process repeated until the defect worn, re-alignment, the normal grinding correct elasticity. This method is inefficient, and requires the operator to have a higher technical level, but in stand-alone, single-piece production using this method to save the high success rate, not to delay the production schedule.
 
2 chemical deposition methods

beyond the design tolerance standard for the bearing parts, chemical deposition method can be used to save. Chemical deposition of works by a variety of chemical reactions between the chemicals, even in parts of the surface have a certain thickness of the metal coating, tempered by an additional metal layer and parts to ensure the original hardness and mechanical properties of the same. Chemical deposition only increased the size of parts, components do not change the shape of tolerance, which is why tolerance-tolerance parts, using chemical deposition method is an effective rescue, at present, the maximum sediment thickness of up to 0.1mm or so unilateral.



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