RU2395373C1 - Cutting tool and cutting plate for it - Google Patents

Abstract

FIELD: mechanics. ^ SUBSTANCE: cutting tool is designed for processing of holes and comprises body, where at least one replaceable cutting plate is installed, being arranged in appropriate seat fixed in it by means of fastening screw and having two cutting blades. On body there is at least one support plate rigidly fixed, having support surface for interaction with processed surface of hole. In order to reduce consumption of tool materials, at least on one support plate there are grooves arranged, which form at least one ribbon on its support surface. Cutting plate has two cutting blades, every of which includes cutting and calibrating edges. At the same time calibrating edges of both blades are parallel to each other. In order to achieve the same technical result in section perpendicular to calibrating edges, it is arranged in the form of angle limited in longitudinal direction by means of end surfaces, besides shelves of angle are arranged at internal angle of 90-120 and are symmetrical relative to its bisector. ^ EFFECT: at the same time from the side of end surfaces there are grooves arranged as limited by conical surfaces intended for interaction with head of fastening screw. ^ 3 cl, 10 dwg

Description

The invention relates to the field of metal cutting tools, tools for processing holes, such as drills or reamers.

Known cutting tool for processing holes with a longitudinal axis and comprising a housing on which at least one interchangeable cutting insert is installed, located in the corresponding housing slot, fixed therein by means of a fixing screw and having two cutting blades, and at least one rigidly fixed a support plate having a support surface for interacting with the machined surface of the hole (see international application WO 2009/030455, B23D 77/02, 2009), / 1 /.

Also known is a cutting insert for mounting a cutting tool for machining holes in a housing socket, having two cutting blades, each of which includes a cutting and calibrating edge, while the calibrating edges of both blades are parallel to each other (see / 1 /).

The cutting and support plates of tools for machining holes are made of expensive tool materials such as hard alloys, so it is urgent to reduce the consumption of these materials when making cutting and support plates.

The problem in relation to the cutting tool is solved by the fact that in the tool having a longitudinal axis and comprising a housing on which at least one interchangeable cutting insert is installed, located in the corresponding housing socket, fixed therein by means of a fixing screw and having two cutting blades, and at least one support plate having a support surface for interacting with the machined surface of the hole is rigidly fixed, according to the invention, at least one support plate is made We have recesses forming at least one ribbon on its supporting surface.

In this case, the task is also solved by the fact that the ribbon or ribbons are located symmetrically with respect to its longitudinal axis.

Regarding the cutting insert, the problem is solved in that the cutting insert for installation in the housing of the cutting tool for processing holes, having two cutting blades, each of which includes cutting and calibrating edges, while the calibrating edges of both blades are parallel to each other, according to the invention in the cross section perpendicular to the calibrating edges, the cutting insert is made in the form of a corner, bounded in the longitudinal direction by the end surfaces, and the flanges of the corner are located at an internal angle om 90 ° -120 ° and are symmetrical with respect to its bisectrix, the side end faces recesses bounded by conical surfaces designed to interact with the head of the fixing screw.

The proposed invention is presented in figures 1-10, in which:

figure 1 shows the end view of the cutting tool;

figure 2 shows a left view of figure 1;

figure 3 shows a view of figure 1 when one ribbon is formed on the support plate;

figure 4 shows a view of figure 1 with the formation on the base plate of several ribbons;

figure 5 shows a section bB in figure 1;

figure 6 shows a section bb in figure 3;

in Fig.7 shows a section GG in Fig.4;

on Fig shows an end view of the cutting insert;

in Fig.9 shows a left view in Fig.8;

figure 10 shows a section DD in figure 8.

The cutting tool for processing holes has a longitudinal axis 1 and comprises a housing 2. For connecting to a machine spindle or adapter, a shank 3 is attached to the housing.

At least one interchangeable cutting insert 4 is installed on the housing 2, located in the corresponding housing slot, fixed therein by means of a fixing screw 5 and having two cutting blades 6 and 7.

To direct the cutting tool along the treated surface on the housing 2 is rigidly fixed, for example by soldering, at least one support plate 8 having a supporting surface for interaction with the machined surface of the hole.

Recesses 9 are made on at least one support plate 8, forming at least one ribbon 10 on its supporting surface. FIGS. 3 and 6 show the implementation of the support plate with one ribbon. Figures 4 and 7 show the implementation of the support plate with several ribbons. Ribbons 10 can be arranged symmetrically with respect to the longitudinal axis 1 of the cutting tool.

To supply coolant to the cutting and support plates in the shank 3 and the housing 2 can be made corresponding holes 11.

The implementation of the recesses 9 can reduce the consumption of hard alloy and improve the lubrication conditions of the base plates.

The cutting insert 4 is designed to be installed in the socket of the cutting tool for processing holes and has two cutting blades 6 and 7, each of which includes a cutting 12 and a calibrating 13 edge. In this case, the calibrating edges 13 of both blades are parallel to each other.

In a cross section perpendicular to the calibrating edges 13, the cutting insert is made in the form of a corner bounded in the longitudinal direction by the end surfaces 14, and the flanges of the corner are located at an internal angle of 90 ° -120 ° and are symmetrical with respect to its bisector 15. Moreover, from the end surfaces 14 made recesses limited by conical surfaces 16, designed to interact with the head of the fixing screw 5.

The implementation of the cutting insert in the form of a corner can significantly reduce the consumption of hard fame in comparison with its implementation, for example in the form of a rhombus.

Claims (3)

1. A cutting tool for processing holes, comprising a longitudinal axis and a housing on which at least one interchangeable cutting insert is mounted, located in a corresponding housing slot, secured therein by a fixing screw and having two cutting blades, and at least one rigidly fixed a support plate having a support surface for interacting with the machined surface of the hole, characterized in that at least one support plate has recesses forming on its support surface of at least one ribbon. 2. The cutting tool according to claim 1, characterized in that the ribbon or ribbons are located symmetrically relative to its longitudinal axis. 3. A cutting insert designed to be fixed by means of a fixing screw in a socket of a cutting tool body for processing holes and having two cutting blades, each of which includes a cutting and calibrating edge, wherein the calibrating edges of both blades are parallel to each other, characterized in that in cross section perpendicular to the calibrating edges, it is made in the form of a corner, bounded in the longitudinal direction by the end surfaces, and the shelves of the corner are located at an internal angle of 90-120 ° and are symmetrical with respect to in particular, its bisector, while on the side of the end surfaces grooves are made limited by conical surfaces intended for interaction with the head of the fixing screw.

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