A cutting bit (10), in particular for face milling cutters, having an upper and a lower surface (3) which are connected by circumferential edge surfaces (4), wherein the cutting bit in plan view on to the upper surface (3) is of an approximately octagonal basic shape with alternately small and large corner angles, wherein formed between the respective corners (6, 7) at the transition of the circumferential surfaces (4) to the upper and/or lower surface (3) are respective cutting edges (1a, 1b, 1c, 1d, 2a, 2b, 2c, 2d) of which a part (2a, 2b, 2c, 2d) in a top view appear as in a slightly broken or curved over a relatively smaller radius for use as roughing cutting edges and another part extends between adjacent corners (6, 7) straight or with a relatively larger radius for use as finishing cutting edges (1a, 1b, 1c, 1d). In order to provide a cutting bit having the afore mentioned features, which may also be used as wide finishing cutter, but which nonetheless has at least two and preferably at least four finishing cutting edges which can be used for either direction of rotation, there is suggested that in the top view perpendicularly onto the upper surface the cutting bit is of a symmetrical configuration only with respect to a rotation by 180° but not with respect to a rotation by 90°.
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机译:切削头( 10 B>),特别是用于平面铣刀的切削头,其上表面和下表面( 3 B>)通过圆周边缘表面( 4)连接 B>),其中,在俯视图中,上表面( 3 B>)上的切削刀头具有近似八边形的基本形状,具有交替的小和大的转角,其中,在各个转角之间形成(在圆周表面( 4 B>)到上表面和/或下表面( 3 B>)的过渡处的 6、7 B>)是相应的切削刃( 1 B> a, I> 1 B> b I> ,1 B> c, I> 1 B> d, I> 2 B> a I> ,2 B> b I> ,2 B> c I> ,2 B> d I>),其中一部分( 2 B> a I> ,2 B> b I> ,2 B> c I> ,2 B > d I>)在顶视图中显示为在相对较小的半径上略微折断或弯曲,用于粗糙切削刃,另一部分在相邻的角之间延伸( 6,7 B >)笔直或半径较大我们用作精加工切削刃( 1 B> a I> ,1 B> b I> ,1 B> c I> ,1 B> d I>)。为了提供具有上述特征的切削刀头,其还可以用作宽的精加工刀具,但是仍然具有至少两个并且优选地至少四个精加工切削刃,其可用于任一旋转方向,建议在垂直于上表面的俯视图中,切削刀头仅相对于旋转180°而不是相对于旋转90°具有对称的构造。
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