| 摘要 |
A detachable cutting plate which is of polygonal, equilateral, but not equiangular, shape and designed for centerless descaling of rough-drawn or rough-rolled materials, by radial mounting on a rotary multi-tool head, characterized in that it comprises along each main cutting edge two adjoining chip-breaking surfaces consisting of separate concave grooves; (a) the first facing the straight part of the main cutting edge, of which the axis directing the surface is parallel with the said edge and forming a cutting angle alpha 1; (b) the second facing the curved part of the edge connecting the main cutting edge to the secondary planing edge having a directing axis perpendicular to the plane bisecting the curved cutting part and forming a cutting angle alpha 2.
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