| 摘要 |
FIELD: machine building.SUBSTANCE: cutting plate has a polygonal shape with two opposite end surfaces and peripheral surface located between them, meanwhile a middle plain M, intersecting the cutting plate, is located between end surfaces, viahole passing between end surfaces, cutting edge formed on the intersection of each end surface with the peripheral surface. Meanwhile the cutting edge has sequentially alternating and conjugate among themselves and separated by the top the sections of main and auxiliary cutting edges. The cutting edge tops in pairs one with reference to another are offset in plains of respectively opposite end surfaces on the plan from above on the cutting plate to the angles ? and ?, the tangential bearing surfaces are located around the viahole on each opposite end surface and have faces with the shape of the second order surfaces. To minimise internal stresses in the cutting plate on each tangential bearing surface at least three faces are made which have the shape of the second order surfaces with tops located symmetrically with reference to the viahole axis and facing from its axis towards the periphery of the cutting plate, and depression directed along the tangent towards the viahole with the exit towards it, so on opposite tangential bearing surfaces the faces are located with 180 degrees mirror symmetry, and on the plan from above on the cutting plate the projection of axes of depressions of edges form a trigon, and the tops of faces of opposite tangential bearing surfaces are mutually shifted to an acute angle ?1 or ?1, equal respectively to the angle ? or angle ? of mutual shift of tops of cutting edges of opposite end surfaces of the cutting plate. The cutting tool, in particular face cutter, has the tool holder head with one or several sockets, meanwhile each socket has one bearing surface and side contact surfaces for the named cutting plate.EFFECT: improvement of performance of cutting plate at processing of hard-processing materials at the expense of minimising of internal stresses.8 cl, 10 dwg |
