On Determining the Hardness of Grinding Wheels—II

Abstract

This second progress report on the crush grading of grinding wheels by means of force measurements takes up the question of the effect of variations in system rigidity on hardness ratings. Preliminary results with the consecutive infeed or single-pass procedure show no appreciable effect with a substantial reduction in rigidity. On the other hand, the two-pass or alternate infeed procedure is shown to be sensitive to system rigidity. This characteristic complicates the problem of devising a procedure for deriving a dimensionless hardness number. On the other hand, it offers a mechanism for isolating the effective rigidity of the grinding wheel itself.