Patent ID: 9221140
Filing Date: 2015-12-29
Classification: B23Q,G05B,Y10T

Abstract:
1. A method of machining a workpiece by intermittent cutting with a machine tool including a rotation drive motor which relatively rotates a tool and the workpiece and a feed drive motor which relatively moves the tool and the workpiece on a two-dimensional plane or in a three-dimensional space, the method comprising: previously obtaining a correlation between abrasion of the tool and a frequency response band of at least one of a feedback control unit controlling an operation of the rotation drive motor and a feedback control unit controlling an operation of the feed drive motor, the correlation being such that the abrasion of the tool has a minimum value when the frequency response band is a predetermined reference frequency response band, and the abrasion of the tool increases as the frequency response band becomes wider relative to the reference frequency response band and also increases as the frequency response band becomes narrower relative to the reference frequency response band; and machining the workpiece by setting, based on the obtained correlation, the frequency response band of a corresponding feedback control unit so that the abrasion of the tool is within a predetermined allowable range.