RU2698113C1 - Support plate and cutting tool - Google Patents

Abstract

FIELD: technological processes.

SUBSTANCE: invention relates to machining of materials, assembled cutting tool with mechanical fastening of cutting plates. Disclosed is a support plate for a cutting plate, mechanically fixed in a body of the cutting tool body, having a body with a through hole, consisting of an upper part, on which the upper support surface is located, and a lower part, on which lower support surface is located, connected by support elements located partially on side surface along periphery of plate and partially between upper and lower parts and made integral with body. In particular, support elements are made in form of rods bent in direction of lower surface, pairwise converging to upper surface.

EFFECT: reduced peak loads associated with cyclic and impact changes of cutting forces and reduced chastises and chips of cutting edges of cutting edges installed on support plates in sockets of cutting tools.

3 cl, 5 dwg

Description

The invention relates to the field of processing materials by cutting, a prefabricated cutting tool with mechanical fastening of the cutting inserts.

Known support plate for a cutting insert mechanically fixed in the socket of the cutting tool body, having a body with a through hole bounded by parallel upper and lower supporting surfaces for interaction with the lower surface of the cutting plate and the lower supporting wall of the cutting tool housing socket, the side surface located between the upper and lower surfaces, while the axis of the through hole is perpendicular to the upper and lower supporting surfaces (see, for example er, “Interchangeable multi-faceted carbide carbide inserts”, M., Publishing house of standards, 1986, “Interchangeable multi-faceted carbide carbide support plates of square shape”, GOST 19076-80, p. 156, 157).

Also known is a cutting tool comprising a housing with at least one socket, in which a cutting insert mounted on a support plate is mechanically fixed with a screw (see "Progressive Cutting Tools and Metal Cutting Modes", Handbook, edited by V. Baranchikov. ., M., "Engineering", 1990, p. 74, Fig. 15),

Support plates are made of materials with high hardness and strength at elevated temperatures arising during the cutting process, such as hard alloys or high speed steels. Since the cutting process is accompanied by cyclic and shock loads (for example, when turning discontinuous surfaces or milling), the technical problem is to reduce the peak values of the cyclic and shock loads, which lead to chips and chipping on the cutting edge of the cutting insert mounted on the support plate.

This problem is solved in that the supporting plate for the cutting insert mechanically fixed in the socket of the cutting tool body has a body with a through hole bounded by parallel upper and lower supporting surfaces for interacting with the lower surface of the cutting plate and the lower supporting wall of the cutting tool housing socket, the side surface located between the upper and lower surfaces, while the axis of the through hole is perpendicular to the upper and lower supporting surfaces, according to the invention, the body is made up of the upper part, on which the upper abutment surface is located, and the lower part, on which the lower abutment surface is located, connected by abutment elements located partially on the side surface on the periphery of the plate and partially between the upper and lower parts and made for one with the body.

This problem is also solved due to the fact that the supporting elements are made in the form of rods curved in the direction of the lower surface, converging in pairs to the upper surface.

The cutting tool for solving this problem by increasing the reliability of attachment of the cutting and supporting plates contains a housing with at least one socket, in which a cutting plate mounted on the supporting plate is mechanically fixed with a screw, and a protrusion is made in the socket on the lower supporting wall a threaded hole for a screw included in the through hole of the base plate, and the height of the protrusion does not exceed the thickness of the base plate.

The proposed support plate and cutting tool are shown in FIG. 1-5, on which:

in FIG. 1 is a front view of a support plate for a tetrahedral cutting insert;

in FIG. 2 is a top view of FIG. one;

in FIG. 3 is a front view of a support plate for a circular cutting insert;

in FIG. 4 is a plan view of FIG. 3

in FIG. 5 is a sectional view of an assembly of a cutting tool assembly with a support plate mounted in its support, a plane passing through the axis of the support plate opening.

The support plate has a body 1 with a through hole 2 bounded by parallel to the upper 3 and lower 4 supporting surfaces for interaction with the lower surface of the cutting plate and the lower supporting wall of the cutting tool housing socket, the side surface 5 located between the upper and lower surfaces, respectively. The axis 6 of the through hole is perpendicular to the upper and lower supporting surfaces.

The shape of the support plate in a plan view corresponds to the shape of the cutting insert and can be multifaceted (for example, tri-, four-, five- or hexagon) or round. In FIG. 1-4, an example shows a tetrahedral and a circular support plate, respectively.

The body 1 is made up of the upper 7 part, on which the upper 3 supporting surface is located, and the lower 8 part, on which the lower 4 supporting surface is located, connected by supporting elements 9, located partially on the side surface on the periphery of the plate and partially between the upper and lower parts and made in one piece with the body 1.

The supporting elements 9 can be made in the form of rods curved in the direction of the lower surface, converging in pairs to the upper surface.

Most preferably, the backing plate is made using additive powder technology using a 3-D printer.

The cutting tool 10 (see FIG. 5) comprises a housing 11 with at least one socket, in which a cutting insert 13 is mounted mechanically with a screw 12 and is mounted on the support plate 14. In this case, the lower supporting surface of the cutting plate interacts with the upper supporting surface a supporting plate, and the lower supporting surface of the supporting plate interacts with the lower supporting wall 15 of the socket.

A protrusion 16 with a threaded hole for a screw 12 included in the through hole of the base plate is made in the socket on the lower support wall, and the height of the protrusion does not exceed the thickness of the base plate. The protrusion increases the rigidity of the screw 12 by reducing its departure.

The implementation of the body of the base plate of two parts connected by supporting elements allows to reduce peak loads associated with cyclic and impact changes in cutting forces and to reduce due to this chipping and chipping of the cutting edges of the cutting plates mounted on the supporting plates in the nests of the cutting tool.

Claims (3)

1. The support plate for a cutting insert mechanically fixed in the socket of the cutting tool body, having a body with a through hole bounded by parallel upper and lower supporting surfaces for interaction with the lower surface of the cutting plate and the lower supporting wall of the cutting tool housing socket, a side surface located between the upper and lower surfaces, while the axis of the through hole is perpendicular to the upper and lower supporting surfaces, characterized in that the body is made up of the upper part, on which the upper abutment surface is located, and the lower part, on which the lower abutment surface is located, connected by abutment elements located partially on the lateral surface along the periphery of the plate and partially between the upper and lower parts and made in one piece with the body. 2. The support plate according to claim 1, characterized in that the support elements are made in the form of rods curved in the direction of the lower surface, converging in pairs to the upper surface. 3. A cutting tool comprising a housing with at least one socket, in which a cutting insert is mounted mechanically with a screw, mounted on a support plate according to claim 1 or 2, and a protrusion with a threaded hole for a screw is made in the socket on the lower supporting wall included in the through hole of the base plate, and the height of the protrusion does not exceed the thickness of the base plate.

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