| 摘要 |
PROBLEM TO BE SOLVED: To provide a hobbing machine in which a detection structure is formed simple and the phase of a hob is accurately discriminated. SOLUTION: A dummy workpiece 26 cylindrically formed on the outer periphery is set on the axis of a workpiece. A gear generation is performed in the dummy workpiece 26 by using the end area 17a-2 of the edge 17a of the hob 17 not used for finishing. Therefore, a fine slit part 26a is formed in the dummy workpiece 26. Then, the position of the fine slit part 26a is detected by a sensor, and based on the detected results, the phase of the fine slit part 26a is discriminated. According to the phase of the fine slit part 26a, the phase of the edge 17a of the hob 17 is converted. COPYRIGHT: (C)2009,JPO&INPIT
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