Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 13, 2017 - November 17, 2017
In current transfer machines for the conveyance of flexible bands, operation sometimes stops as a result of fluctuations in the tension of the flexible band, necessitating the readjustment of the machine and causing a reduction in productivity. Therefore, in this study, the factors influencing the positioning accuracy of the flexible band were clarified, and a method of monitoring the operating condition of the transfer machine was developed and with the ultimate goal of improving productivity. The results of this study indicate that the cause of the failure is the fluctuations in the torque of the transfer machine and the displacement of the part used to process the flexible band (processing part). To detect abnormalities in the tension of the flexible band, methods using a clamp-on ammeter, a rotary encoder, and a strain gauge were proposed. The displacement of the processing part was measured using a laser displacement sensor. Because the tension of the flexible band and the current and torque of the motor were found to show the same trends as the rotational speed of the motor was varied, it is considered that abnormalities can be detected by monitoring the current and torque. In addition, because the processing part apparently undergoes elastic deformation, it is necessary to determine the influence of this deformation on the machining accuracy.
