工業用自動糸切りミシンの回転軸に生じる衝撃トルク

概要

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In industrial sewing machines with automatic thread trimmer driven by the cam mechanism, transient torque is produced in the rotating shaft during thread trimming. In this report, a method of estimating the transient torque is studied. As a result, this method which theoretically estimates the torque to the equivalent torsional vibration model of two-degree-of-freedom is found to be valid. Especially, as for the two notaple transient torques T_t and T_t produced during returning period of the follower, the followings are made clear. T_t is caused mainly by the inertia force, and it is produced durring catching process of thread. On the other hand, T_t is caused mainly by the needle thread tension, and it is produced during drawing process of thread. Although T_t is in proportion to the square of the arm shaft speed, T_t is independent on the speed. Therefore, it is possible to estimate T_t statically by the force acting on the cam.
公益社団法人精密工学会の論文
1983-04-05