Study on Cutting State Monitoring using Speed Difference Square Method

This paper deals with a new monitoring method of cutting state without dynamometers. The authors applied to examine the Speed Difference Square Method (SDSM) in this study. SDSM is a method to monitor the end milling process, and is based on the rotational speed of the milling spindle. The authors focused on the income and outgo of cutting power around the spindle, defined the SDSM index. In previous study of the authors, high correlation between the SDSM index and the cutting force by end face cutting on square end mill became clear. In this study, it was cleared that the ratio of cutting force of the thrust direction is greatly affect the correlation between cutting force and the SDSM index. And in plane cutting and contour cutting, the lower cutting of the ratio of cutting force of the thrust direction is suitable for monitoring of cutting state by the SDSM.