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发明授权
CN109414771B 切削刀片及可转位刀片式旋转切削工具 有权

切削刀片及可转位刀片式旋转切削工具
摘要：
切削刀片(5)具备切削刃部(4)，切削刃部(4)具备：底切削刃(11)，呈朝向中心轴(C)方向的前端侧凸出的圆弧形状；外周切削刃(9)，呈朝向径向外侧凸出的圆弧形状；和刀头圆弧半径切削刃(13)，用于将底切削刃(11)的径向外端和外周切削刃(9)的中心轴(C)方向的前端相连，并且呈朝向前端外周侧凸出的圆弧形状。底切削刃(11)和外周切削刃(9)被形成为以假想直线(VL)为对称轴彼此线对称的形状，其中，该假想直线(VL)经过刀头圆弧半径切削刃(13)的圆弧中心点(O)且以45°的角度(α)与中心轴(C)交叉。
摘要（英）：

A cutting insert (5) includes a cutting edge portion (4), and the cutting edge portion (4) includes a bottom cutting edge (11) forming an arc shape that protrudes toward a front end side in a central axis (C) direction, an outer peripheral cutting edge (9) forming an arc shape that protrudes toward an outside in a radial direction, and a cutting edge of corner R (13) that connects an outer end of the bottom cutting edge (11) in the radial direction and a front end of the outer peripheral cutting edge (9) in the central axis (C) direction and forms an arc shape that protrudes toward a front end outer circumferential side. The bottom cutting edge (11) and the outer peripheral cutting edge (9) are formed so as to form a linearly symmetric shape together with respect to an imaginary straight line (VL) that passes through an arc central point (O) of the cutting edge of corner R (13) and intersects the central axis (C) at an angle ± of 45° as a symmetry axis.

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