創成倣機構による加工精度向上に関する研究

　バンケル型機関のロータハウジング内周面はトロコイド曲線の形状である．本論文はこの形状を高精度に加工する倣機構付き創成機構について述べる．トロコイド形状は創成機構をそなえた内面研削盤によって生産加工される．創成機構は慣性力や慣性トルクあるいは組立誤差などのために，加工中のロータハウジングの運動軌跡が理想的位置からのずれを生じ，加工精度が低下する．創成機構による工作物運動精度を高めるため，倣機構を追加した．その結果，トロコイド形状の加工精度が向上した．

 The working chamber of a Wankel rotary engine makes a peri-trochoidal form. This paper describes an analytical and experimental investigation how to create this form precisely. The form is manufactured by the internal grinder, which consists of a generating mechanism. The mechanism is deformed by inertia forces and assembly errors of mechanism and so forth. For that reason, in process the track of a workpiece is derailed from the theoretical line. Consequently the ground formative accuracy is affected badly.
 To compensate for the distortion, we attached a copying device to the generating mechanism. We have investigated how this copying device improves the formative accuracy of a trochoidal form. We have obtained theoretical estimation of the copying device and compared the theoretical results with the experimental ones. We found good agreement between them.