| 摘要 |
PROBLEM TO BE SOLVED: To provide a groove machining broach for making concentric the inside diameter part and the groove part of the inside of a hole in a work, and performing concentric outer peripheral machining with reference to the inside diameter to make the groove part and the outer peripheral part concentric, and also to provide a broaching method. SOLUTION: In the groove machining broach 1 for machining the hole shape of a hollow part having the groove part and the inside diameter part extending in the axial direction in the hole inside part, at least in the finishing part 3a, the groove part machining cutting blades 23, 24, 25 for machining the groove and the inside diameter machining cutting blades 26, 27, 28 for machining the inside diameter part are disposed in the same lines, and recess parts 29, 30, 31 having no cutting blade and not contacting a workpiece are provided between the groove part machining cutting blade and the inside diameter part machining cutting blade. The material quality of the cutting blade is a cemented carbide, and before heat treatment, the groove part and the inside diameter part of the work are broached with machining allowance. After heat treatment, the groove part and the inside diameter part are simultaneously finished by the groove machining broach 1. Further, the outer periphery is machined with reference to the inside diameter part. COPYRIGHT: (C)2004,JPO
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