Study on Finishing of Pinion Cutters by Form Grinding : 2nd Report, Finishing of Tooth Flanks by Multiple Motions

Abstract

This report describes a new method to finish tooth flanks of pinion cutters by form grinding with multiple relieving motions, which are the approaching motion between the grinding wheel and the pinion cutter, the rotational motion of the pinion cutter and the shifting motion of the grinding wheel. The method can successfully finish the whole depth of the cutting edge of the pinion cutter with an arbitrary profile by one-pass grinding for each tooth flank. The motions were decided as to minimize the cutting edge errors at two regrinding positions. As an example of profile calculation and the finishing test, the involute helical pinion cutter with a protuberance was selected. The profile of grinding wheel was calculated by applying the element removal method. The finishing test was conducted on the NC form gear-grinding machine and the pinion cutter with almost no profile error and a small regrinding error was obtained.