インプロセス計測加工精度補償の研究(第3報) : 汎用旋盤を用いた円筒切削の制御

概要

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In the previous reports, the author proposed a new system, named the workpiece-referred form accuracy control system (WORFAC), and confirmed an effectiveness of this method. On this report, this method is tried to be applied to an ordinary lathe, and to get a higher cutting form accuracy with a simple mechanism. The workpiece is put between a cutting tool and a sensor, which are attached on a same tool post. The cutting tool is set on the micro-tool servo with a piezoelectric actuator. The non-contact optical surface sensor detects the error of the relative distance between the cutting tool the machined surface. So far, the quantity of feedback is the same amount as the error of detected distance. Here, a new function of corrective servo is found out by changing the feedback volume which is the amount multiplied by Some coefficient m (less than 1) to the detected error. This function can reduce and converge the errors of the carriage motion. Changing the coefficient, the amount of remaining error of manufactured surface can be chosen. These characters are confirmed by both simulation on a computer and experiment of cylindrical turning.
1993-06-05