| 摘要 |
PROBLEM TO BE SOLVED: To drill a high-grade hole with reduced burrs and fuzz in a fiber-reinforced composite material represented by FRP, and maintaining excellent hole drilling quality for a long period of time by extending the service life of a tool while suppressing an increase in economic burden. SOLUTION: The hole is drilled in the fiber-reinforced composite material comprising reinforced fiber and matrix resin by using a ball end mill 1 or a radius end mill. The feed of the tool per one blade, and a ratio of the radius of the inscribed circle of a cutting edge to the feed are appropriately selected, and hole drilling is performed while sucking chips. COPYRIGHT: (C)2009,JPO&INPIT
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