動力伝達用ポリアセタール歯車の強度の研究 (第2報)

静電容量法による摩耗進行追跡

抄録

This report concerns the relationship between the extent of intermesh and the degree of toothsurface wear when a polyacetal spur gear is engaged with a steel gear. In the present study, a change in backlash was observed by measuring the electrostatic capacity across the sectorial electrodes mounted on the side of the tested gear. By measuring the distribution of temperature from the circumference to the center of the gear caused by frictional heat on the tooth surface, a study was made on the wear on the tooth surface with respect to the effect of thermal expansion on backlash. Results obtained are as follows : (1) Observing changes in backlash during operation, it was found that when the amount of thermal expansion is greater than the amount of wear, backlash is reduced below that immediately after the starting operation. (2) A greater load on the tooth increased the amount of wear per one revolution resulting in rapid increase in backlash. (3) It was found that the wear rate was largely influenced by the applied load and less influenced by the number of revolutions.