Abstract
This paper deals with a method for centerless grinding of light workpieces having a concentric through hole. The machining accuracy for light workpieces tend to be poor compared with that for solid workpieces. This phenomenon was clarified through geometrical and dynamic analysis of a centerless grinding system companing a regulating wheel, a grinding wheel and a supporting blade.
The lead angle of the regulating wheel used to feed a workpiece yields a non-uniform peripheral speed in the axial direction of the regulating wheel. Higher peripheral speed of the regulating wheel induces an upward friction force on the workpiece with a lower peripheral speed. This upward friction force causes an abnormal motion of the workpiece during grinding, which results in inferior machining accuracy. This phenomenon becomes more and more conspicuous on lighter workpieces.
