CUTTING PLATE AND PRECAST ELEMENTS Russian patent published in 2017 - IPC B23B27/10 B23B27/16 

FIELD: mechanical engineering.

SUBSTANCE: cutting plate has two identical opposing face surfaces, build in the shape of polygons and located between the side surfaces, the cutting edge, located at the intersection of mentioned side surfaces of one or both face surfaces, a central opening, whose axis is the axis of symmetry of the cutting plate. In this case, the central hole has a cylindrical portion and a tapered portion adjacent to one of the face surfaces. The cylindrical portion of the central opening in the restricted cross section convex curve whose number is equal to the number of corners of the polygons end faces conjugate concave surfaces in cross section, intersecting the bisectors of the angles of the end surfaces of polygons.

EFFECT: increase of the efficiency of lubricating and cooling supply.

3 cl, 5 dwg