SU1199471A2 - Cutting tool - Google Patents

Abstract

CUTTING ON AUTH. St. 1138255, characterized in that, with the aim of increasing the reliability of fastening, a hole is made in the holder perpendicular to the longitudinal slit), and at the cutting end of the restrictive insert the bevel is made at an angle to the axis of the hole opposite to the tip of the cutting element, the cutter is provided with said hole with a threaded hole with a screw installed in it, designed to interact with the bevel of the restrictive insert. О О 4 si с Ю 887 FIG.

Description

The invention relates to metalworking, in particular to cutters with mechanical fastening of cutting inserts from superhard materials.

The purpose of the invention is to increase the reliability of attachment of the cutting element in the tool holder · by preventing the possibility of movement of the restrictive insert securing the cutting element under the action of vibrations that occur during cutting.

The fixation of the restrictive insert ensures its constant contact with the cutting element and prevents the possibility of the cutting element freeing up and shifting under the influence of cutting forces, which affects the quality of the machined surface and the resistance of the cutter.

In FIG. 1 shows a cutter, ^ a cut; in FIG. 2 - the same, top view; in FIG. 3 is a section AA in FIG. 2.

! The cutter contains a split holder 1, on the parts of which a socket is made in which the cutting element 2 is placed. Along the slot 3 of the split holder 1, a hole 4 is made in which a restrictive insert 6 is installed with its split end 5, the integral end of which interacts with the cutting element 2.

A bevel 7 is made at the split end 5, at an angle β toward the cutting element 2. In the holder 1, perpendicular to the longitudinal slot 3 is made

99471. 2, an opening 8 in which a sleeve 9 is installed, in a threaded hole of which a screw 10 is placed, interacting with the bevel 7 of the split end 5 _{5 of the} restrictive insert.

A cutting element 2 is installed in the slot of the split holder 1, and a restrictive insert is inserted into the hole 4 with its split end 5 until it contacts the cutting element 2. In this form, the cutter is mounted in a mandrel (not shown) and is compressed by a screw interacting with the flat 11 made on a cutting holder 15, 1. In this case, the split holder is compressed together with the restrictive insert, and the cutting element 2 is fixed. After that, the screw 10 is screwed through the hole in the mandrel 20 until it stops against the bevel 7 of the split end 5 of the restrictive insert. ..

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Under the action of the components a and b 25 of the force r developed by the screw 10, the restrictive insert is pressed in the hole 4 in the direction opposite to the tip of the cutter, and additionally secures the cutting element 2.

3Q Screw 10, being in contact with the bevel 7 of the split end 5 of the limiter insert, prevents it from moving in opening 4 in the direction of the tip of the cutter. This ensures constant contact of the integral end of the restrictive insert 6 with the cutting element 2.

VNIIPI Order 776.6 / 14 Circulation 1085 Subscribed

Branch of PPP Patent, Uzhgorod, 4, Pro'ektnaya St.

Claims (1)

CUTTER by auth. St. No. 1138255, characterized in that, in order to increase the reliability of fastening, a hole is made in the holder, perpendicular to the longitudinal slot, and a bevel is made at the split end of the restrictive insert at an angle to the axis of the hole to the side; opposite from the top of the cutting element, and the cutter is equipped with a sleeve with a threaded hole located in the specified hole and a screw installed in it, designed to interact with the bevel of the restrictive insert ς © ζ © <!