SU1577180A2 - Cutting plate - Google Patents

Abstract

The invention relates to metal working. The purpose of the invention is to increase processing performance. The cutting plate contains radius protrusions made on the lateral edges 4. The angular radius protrusions are displaced to the center of the cutting plate from the planes A and B, in which the axes of the radius protrusions 1 are spaced b. The cutting protrusions are inclined into the body of the cutting plate at angles of about and (Јg. During processing, the cutting allowance t is divided into steps 1, ... Ts. Step t, less than the others by the value of b, ps therefore one, the cutting protrusion is less loaded than the other ledge

Description

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FIELD: metal working.

The aim of the invention is to increase the machining productivity by increasing the Allowable Feed by reducing the load on the angular radius of the cutting insert.

 FIG. 1 shows a cutting plate in axonometric projection; in fig. 2 - the same, top view.

The cutting plate contains radial protrusions 1, which are inclined into the plate body at an angle about equal to the required back corner of the cutting plate. Along the lines 2 and 3 of the interface of the surfaces of the radial protrusions with the rear edges 4, each protrusion has the shape of a wedge with an angle o, whose apex is facing the bearing surface 5 of the cutting insert. The distance 1 between the axis of symmetry of the radial protrusions is less than two protrusion radii R, therefore their edges in the plane of the front surface 6 of the plate are connected to one another and form arcuate cutting edges 7, which consist of arcs connected to one another. The corner protrusions of the cutting plate are cylindrical 8S, the axial lines 9 of which are inclined to the axis of symmetry of the cutting plate at an angle ОЈг which is the back angle at the top of the cutting plate. The R value of the radius middle protrusions 1 and the R-i angular cylinders .8 are equal. The axial lines 9 of the angular protrusions are offset to the center of the cutting plate with respect to the point at the intersection of the front surface 6 with the planes A and B passing through the axes of the radius protrusions on the adjacent lateral edges x, and the offset b is smaller than the radius R of the protrusion.

In the manufacture of the cutting plate without displacing the axes of the corner projections to the center of the plate, the last protrusions (from the adjacent radius protrusions to a distance greater than the radius of the protrusion, therefore, at the tip of the cutting plate, the most dangerous

section K, which determines the flow during processing.

When the center lines 9 are displaced to the center of the cutting plate, the edges of the corner protrusions protrude from the adjacent radius protrusions a distance shorter and by an amount b. The distance b must be less than the radius R and is determined depending on the material being processed and the strength of the cutting insert.

During processing, the shear allowance t is divided into steps {... C., Corresponding to the number of radius protrusions I. At the same time, the depth of allowance t, cut by the angular radius protrusion PJ, is less than t. ... C by the magnitude b of the displacement of the axial lines 9 to the die-reamer, therefore, and the cutting force acting on the angular protrusion R ,, less than the others.

When used in cutters, the cutting plates are installed in the cutter body so that the radius protrusions of the adjacent plates are arranged in a checkerboard pattern; therefore, the allowance cut by Frezoy is divided into steps, which are twice as large as the radius protrusions on one face of the cutting plate.

The use of the proposed plate allows to increase the machining productivity by increasing the feed rate due to a decrease in the cutting force acting on the top of the insert.

Claims (1)

Invention Formula Cutting plate on ed. St. . No. 1230748, characterized in that, in order to increase the productivity of processing, the axes of the angular radius protrusions are offset to the center of the cutting plate relative to the intersection point of the front surface with the planes passing through the axes of the radius protrusions on. adjacent lateral faces of the cutting insert, the offset value being less than the radius of the protrusion. Compiled by V. Zolotov Editor M, Strelnikova Tehred M. Didyk Proofreader M. Kucher va Order 2444 Circulation 567 VNIIPI State Committee for Inventions and Discoveries at the State Committee for Science and Technology CXJCP at 113035, Moscow, Zh-35, 4/5 Raushsk Nab. Fi &. 2 Subscription