Abstract
The problem of work-regenerative waviness encountered in centreless grinding is discussed with respect to the dynamic characteristics of the machine and the effect of the geometrical configuration of the workpiece in the system of the grinding operation. An analytical method is described for deriving threshold stability charts which are useful for discussing the relative stability of different grinding configurations. It is shown that certain configurations may lead to chatter regardless of the dynamic characteristics of the machine, and these are termed geometrically unstable. The frequency of the geometrical instability is determined theoretically and gives agreement with the results of experiments and computer predictions of the workpiece shape.
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