STUDY ON THE MACHINING ACCURACY OF ROUND-OFF TRUING METHOD- EXPERIMENTAL ANALYSIS OF ERROR FACTORS-

The round-off truing method of a grinding wheel for a precision form grinding, where the circular motion of a CNC grinding machine and an abrasive stick are utilized, was proposed by the authors. In the previous studies, experiments and simulations were performed to clarify the mechanism and appropriateness of this method. Truing accuracy for a precision form grinding, however, could not be realized through these studies. In this study, truing experiments have been performed to realize the effects of geometrical and motional errors on the truing accuracy. The distribution of wear ratio of the abrasive stick, α, directly affects the truing accuracy. Compensation method of the maldistribution of α is then proposed, and the proposed method results in the improvement in truing accuracy. Key words: form grinding, round-off truing, abrasive stick, brake truer, truing accuracy, form error, wear ratio 1