Analysis of the way of SKF bearing grinding burn

Source: Bearing network time: 2017-12-27

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The effect of grinding heat on SKF bearings is in the grinding process; if the heat temperature is not good, the surface of the workpiece is easy to form burns; the outer surface of the workpiece (tens of microns to several hundred microns deep) is unevenly annealed and softened. (for hardened steel); perhaps hardened (for untempered steel). Severe burned workpiece; appearance of brown or black oxide film; but sometimes the oxide film can be ground; at this moment, it should be etched with diluted acidic solution; Found a burn.
Usually SKF bearings are used to grind burns:
a, vibrating burn: along the outer surface of the workpiece vibration pattern spread; mainly due to the oscillation of the process system.
b. Scratch burns: that is, the wear marks are scattered along the grinding wheel; it is formed by the grinding wheel not being sharp.
c. Columnar burns: unequal distances along the axial direction of the workpiece; the lack of magnetic force of the uncentered clamp; the workpiece occurs with the grinding wheel rotating and instantaneous sliding; the damage is deep.
d, partial burns: it is because the grinding allowance is not uniform; the grinding thickness is inconsistent.
e. Uniform burns: it is because the grinding allowance is not uniform; the grinding wheel is too hard; the feed rate is too large; the SKF bearing speed is too low or too high.
f, in addition to burns; the instantaneous high temperature of the workpiece surface is very simple, the internal stress forms cracks.

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