Rotary cutting tool and method for manufacturing such a rotary cutting tool
AssigneeSakai Threading Tool Co., Ltd.
InventorHitoshi Yamaguchi
Life of this patent
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Abstract
A rotary cutting tool is provided which is less likely to cause chips to get stuck, and which can be manufactured at a low cost. The rotary cutting tool includes a body having a relief surface (6) and a rake face (7) which is connected to the relief surface (6). An oxide film (9) is formed on the rake face (7) by oxidizing the surface of the body, and a hard film (8) is formed on the relief surface (6) and the oxide film (9), The hard film (8) is made of a metal carbide, a metal nitride, a metal carbonitride, or a solid solution thereof.
Claims10
A rotary cutting tool comprising a body having a relief surface (6) and a rake face (7) which is connected to said relief surface (6), wherein an oxide film (9) is formed on said rake face (7) by oxidizing the surface of the body, the oxide film (9) being absent from the relief surface (6), and wherein a hard film (8) is formed on said relief surface (6) and said oxide film (9), said hard film (8) comprising a metal carbide, a metal nitride, a metal carbonitride, or a solid solution thereof.
A method of manufacturing a rotary cutting tool comprising a body (10), said method comprising the steps of forming a rake face (7) on said body (10), oxidizing, after forming the rake face, a portion of the surface of the body including said rake face (7) to form an oxide film thereon, cutting, after forming said oxide film, an outer periphery of said body (10) to form a relief surface (6), coating, after forming the relief surface, a portion of the surface of the body including said relief surface (6) with a metal carbide, a metal nitride, a metal carbonitride, or a solid solution thereof.
Dependencies are inferred from the claim text.