Abstract
The high precision gears are strongly required for advanced motion and power transmission. And the improved evaluation technology for the precision gears is becoming indispensable. Moreover, the reliability of the measured value became important when the accuracy of the gear becomes high, and the establishment of the traceability system has been needed. For the establishment of the traceability system, the higher precision gear measuring machine (GMM) with lower uncertainty is expected to improve gear calibration uncertainty. For the purpose, we proposed a new concept of the high precision GMM from analyzing the problems of the conventional GMM, and we have developed a prototype of the high precision GMM using the direct drive mechanism. Then, the high measurement capability of the developed GMM was verified by the evaluation method using the gear artifacts such as involute, helix and pitch artifact. On the other hand, some new methods conducting GMM accuracy evaluation using simple shapes such as sphere and plane have been proposed as standards. Therefore, we tried a new evaluation method for tooth profile measurement using a sphere artifact whose sphere was treated as the tooth flank, and the high measurement capability of the developed GMM was verified by a new evaluation method. This paper describes about the evaluation results of the developed GMM for tooth profile measurement using sphere artifacts and discusses the effectiveness of the sphere artifact as a new artifact.
