MACHINING APPARATUS AND MACHINING METHOD

摘要

A machining apparatus includes: a workpiece spindle having a retainer that retains a workpiece having a noncircular peripheral surface; an adjustment unit that adjusts a retaining force between the workpiece and the retainer; a phase determination member that can determine a phase of the workpiece; and a phase determination detection unit that detects completion of the phase determination. The retaining force is a retaining force for phase determination until the phase determination is completed, and the retaining force is switched to a retaining force for machining which is larger than the retaining force for phase determination after the phase determination is completed.

主权项

1. A machining apparatus, comprising:
a workpiece retainer that retains a workpiece having a noncircular peripheral surface; a workpiece spindle having an attachment portion to which the workpiece retainer is attached; an adjustment unit that adjusts a retaining force between the workpiece and the workpiece retainer; a phase determination member that is placed in a rotation range of the workpiece, and that determines a phase of the workpiece as the workpiece is rotated so that the peripheral surface contacts the phase determination member and the workpiece rotates relative to the workpiece retainer; a phase determination detection unit that detects completion of the phase determination; a control unit that controls the adjustment unit so that the retaining force is a retaining force for phase determination until the phase determination is completed, and the retaining force is switched to a retaining force for machining which is larger than the retaining force for phase determination after the phase determination is completed, and that uses a phase of the workpiece spindle at the time the phase determination is completed as a machining reference phase; and a machining unit that machines the workpiece by using the machining reference phase as a reference.