The Dividing Precision Measurement of the End-Tooth Plate for Ultra-Precision Gear Machining

Abstract

For the purpose of machining ultra-precision gear, its pitch accuracy reached grade 1, instead of traditional index plate used the end-tooth plate to reform the machine dividing system of Y7125 grinder so that its dividing precision will be improved (within3). The dividing accuracy of the modified machine tool is mainly decided by the dividing accuracy of the end-tooth plate under the state of freedom. It requires the dividing accuracy of end-tooth plate itself as a reference to calibrate the dividing accuracy of Y7125 grinder. Therefore, in the paper, a set of experiment equipments are designed to measure the dividing precision of the end-tooth plate under the state of freedom and parallel experiments are carried out. From researches, it is discovered that the maximum dividing error of this plate is 0.46 and the measurement uncertainty in experiment is ±0.03. This indicates that it meets the processing requirement of the ultra precision gear and the modification turns out to be true