| 摘要 |
PROBLEM TO BE SOLVED: To provide a broach conducting a cutting edge processing of a coating broach covering a large number of cutting edges with hard coating, and capable of stably cutting for a long time causing few machining errors. SOLUTION: This coating broach having a large number of cutting edges on a tool body, and covering the cutting edges with hard coating. In the coating broach, a cutting surface near the cutting edges is made to be a non-coating surface, and asperities on a hard coating surface in a flank side neat the cutting edges are removed by polishing. The surface roughness of the polished surface is made to be not more than 1μm at the maximum surface roughness Ry. COPYRIGHT: (C)2003,JPO
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