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The reason for the deformation layer formed by the SKF imported bearing grinding force

Source: China Bearing Network Time: 2013-03-25

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SKF bearings are used in the grinding process; the outer surface of SKF bearing is affected by the cutting force and friction of the grinding wheel; the outer layer of SKF bearing constitutes the directional plastic deformation layer and the work hardening layer; these bearing deformation layers will affect the SKF import. Bearing stress changes and service life; the following is the correlation analysis of these metamorphic layers.
1. The high temperature deformation layer of SKF imported bearings will form the temperature at the force surface; the elastic limit of the bearing surface will decrease rapidly; the serious condition will make the elasticity disappear; when the tightening force and the friction force together; Will cause free expansion; subject to the base metal; bearing shrinkage; plastic deformation in the outer layer. High temperature plastic deformation does not change in the grinding process; will increase with the increase of the bearing surface temperature.
Second, SKF imported shaft cold plastic deformation layer each abrasive grain is just like a cutting edge. However, in many cases; the rake angle of the cutting edge is negative; the abrasive grain is in addition to the cutting effect; Plow effect; leaving a significant plastic deformation layer on the bearing surface. The degree of deformation of this deformation layer will increase with the degree of grinding wheel bluntness and the increase of grinding feed.
Third, the SKF bearing processing hardened layer using the microhardness method and the metallographic method of time due to the deformation of the outer layer of the hardness caused by the processing deformation; casting and heat treatment heating formed by the outer decarburization layer; and then in the future processing is not completely gone; Residues on the outer surface of the bearing will also constitute a softening and tampering of the exterior; the service life of the external bearing will decrease.
The above is the analysis of the reason for the transformation layer of the SKF imported bearing grinding force; in the purchase of the bearing must be carefully selected to select the genuine SKF imported bearings; is the machine to worry about the work of ensuring.

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