Patent ID: 9056385
Filing Date: 2015-06-16
Classification: B23Q,B24B,G05B

Abstract:
1. A grinding machine comprising a grinding wheel configured to grind a workpiece, and a grinding wheel control system configured to move the grinding wheel relative to the workpiece to grind the workpiece to have a predetermined finish dimension, the grinding machine comprising: a first control section configured to preset a contact position at which the grinding wheel contacts a first workpiece; a second control section configured to position, based on the contact position that has been preset, the grinding wheel at a first product grinding start position located back away from the contact position; a third control section configured to move the grinding wheel from the first product grinding start position to grind the first workpiece by a predetermined amount from the contact position so as to obtain a dimension larger than a finish dimension if an outer surface of the workpiece is ground or to obtain a dimension smaller than the finish dimension if an inner surface of the workpiece is ground, and thereafter to feed the grinding wheel back to the first product grinding start position; a fourth control section configured to measure a diameter of the first workpiece that has been ground, and to calculate a residual amount to be ground to obtain the finish dimension, based on a result of the measurement; and a fifth control section configured to position the grinding wheel at a position shifted toward the workpiece by a correction amount, the position being a normal grinding start position in grinding a second and subsequent workpieces, and to move the grinding wheel from the normal grinding start position to grind the workpiece to a finish feed completion position.