关键词: 白层；磨削加工；磨削参数；经验公式

Abstract:

Based on the tests of grinding GCr15 hardened bearing steel, the influences of grinding parameters such as wheel speed, workpiece speed, grinding depth and cooling condition on the thickness of white layer were studied. The experiments indicate rapid heating, rapid quenching and plastic flow result in white layers in grinding process. White layer depth varies with the different combinations of grinding parameters. Grinding depth has the most important impact on white layer depth, wheel speed follows, and workpiece speed at the last. The depth of white layer increases with the increase of grinding depth and wheel speed. The coolant, the reductions of wheel speed and grinding depth all tend to reduce the white layer formation and its thickness.And a statistical model is proposed for the prediction of the thickness of white layer in grinding.

Key words: white layer;grinding process;grinding parameter;statistical model