Hisashi Tamura

A Study on the Improvement in Accuracy of Three-Coordinate Measuring Machine : A Measuring Method of the Distribution of Error Vector

For the purpose of the improvement in measuring accuracy of three-coordinate measureing machine, the measuring method of the systematic errors is proposed. The method described here is based on the distance measuring method which was reported in the earlier paper by authors, and is adequate to determine the distribution of error vector in the measuring range. Then measurement was practically carried out and the distributions of error vector were clarified about two types of three-coordinate measuring machines. In connection with the experimental results, the relation between the distribution of error vector and the geometrical accuracy of machines is discussed. Also the variation of error vector according to the room temperature change is examined and the results is reported.

Research of gear cutting method of helical gear and spiral bevel gear. Basic theory and examples of design.

グリーソン式こう配歯まがりばかさ歯車はよい歯当りを得ることが困難な歯車である.本報では,良好な歯当りを得るため,この歯車を小さな相対曲率で接触する点接触歯車にすることを提案し,その理論と歯切結果についてのべる.本法はグリーソン式カッタの内側切れ刃を円弧にすることで点接触歯車を得るが,カッタ配置を理論的に決定すること以外は従来の片刃歯切法と同じであることから,実用的歯切法であると考えてよい.