| 摘要 |
PROBLEM TO BE SOLVED: To provide a workpiece machining method capable of easily centering a workpiece mounted on a temporary receiving part, even when the outer peripheral surface of the temporary receiving part is machined in a temporary receiving part forming step.SOLUTION: A method for manufacturing a crankshaft by use of a turning/broaching machine 1 includes: a temporary receiving step; a lifting step; a centering step; and a full clamping step. In the temporary receiving step, a crankshaft blank W is placed on first and second temporary receiving parts 32d, 42d. In the lifting step, a rear flange 210 is lifted by a first chuck pawl 32b, and a front shaft 220 is lifted by a second chuck pawl 42b. In the centering step, first and second centers 32c, 42c are inserted into first and second center holes 210CH, 220CH. |
