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1. 发明公开

KR1020140118811A 브로치 审中-实审
标题翻译：拉刀
公开(公告)号：KR1020140118811A
公开(公告)日：2014-10-08
申请号：KR1020140033948
申请日：2014-03-24
申请人： 미츠비시 마테리알 가부시키가이샤
发明人： 요시즈미나오키 , 고바야시요시오 , 고노겐스케
IPC分类号： B23D43/04 , B23D37/04
CPC分类号： B23D43/005 , B23D37/00 , B23D43/06 , Y10T407/16 , Y10T407/1671
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).
摘要翻译：本发明涉及能够充分提高切削加工精度的拉刀。设置在轴状拉刀体（2）的外周上的多个切削刃（3）设置有花键齿组（7），其包含多个花键齿（8），所述花键齿工件材料的孔，以及沿着轴线方向（O）设置在与花键齿组（7）不同的位置的圆齿组（9），并且包含多个圆形齿（10），其将准备孔的内周。至少一个齿槽（12）形成为沿圆周方向沿圆周方向沿圆周方向沿圆周方向（O）彼此相邻的圆齿之间的轴线延伸，组（9）。齿槽（12）朝向轴方向（O）延伸，朝向圆周方向逐渐扭转。花键齿组（7）和圆齿组（9）一体形成在拉刀体（2）的外周。

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