发明名称 BROACH
摘要 The present invention relates to a broach capable of sufficiently increasing the machining accuracy of cutting. A plurality of cutting edges (3) that are arranged on an outer circumference of a shaft-shaped broach body (2) are provided with a spline teeth group (7), which contains a plurality of spline teeth (8) that groove a prepared hole of a work material, and a round teeth group (9), which is disposed in a different position from the spline teeth group (7) along an axis direction (O) and contains a plurality of round teeth (10) that machine an inner circumference of the prepared hole. At least one gullet (12) is formed to extend along the outer circumference of the broach body (2) in a circumferential direction around the axis between the round teeth that are adjacent to one another in the axis direction (O) in the round teeth group (9). The gullet (12) extends toward the axis direction (O), gradually twisting toward the circumferential direction. The spline teeth group (7) and the round teeth group (9) are formed integrally on the outer circumference of the broach body (2).
申请公布号 KR20140118811(A) 申请公布日期 2014.10.08
申请号 KR20140033948 申请日期 2014.03.24
申请人 MITSUBISHI MATERIALS CORPORATION 发明人 YOSHIZUMI NAOKI;KOBAYASHI YOSHIO;KOHNO KENSUKE
分类号 B23D43/04;B23D37/04 主分类号 B23D43/04
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