CZ306972B6 - A cutting tool - Google Patents

Abstract

A cutting tool consisting of at least one support (1), of which: at least one cutting insert (2) extending, wherein between the carrier (1) and the cutting plate (2) there is a plurality of inserts finds a source of strength effect. The source of the force effect is a hydraulic piston (H) arranged between the carrier (1) and a cutting insert (2) and connected to the pressure supply (P) media.

Description

Cutting tool

Technical field

The invention is a cutting tool comprising at least one carrier from which at least one cutting insert protrudes.

BACKGROUND OF THE INVENTION

Increasing demands on the operational characteristics of modern production products while maintaining market-determined production costs place higher demands on the design level and technology of cutting tool production. Increasing the technical and technological level of products contradicts the need to keep production costs at the same production rate.

After a thorough analysis of the prior art in the field of utilizing stress induction in the cutting tool volume, it has been found that a related approach is used in forming technology, for example, for the construction of circular die, where prestressing is achieved by overlapping multiple layers of material forming together the die.

The disadvantages of current cutting tools, in terms of durability, service life or replacement cost, which lose their functional properties relatively quickly, are at least partially overcome by the solution described in the application.

SUMMARY OF THE INVENTION

The present invention is a cutting tool consisting of at least one carrier from which at least one cutting insert protrudes, a source of force effect being provided between the carrier and the cutting insert. From the point of view of applying a constant tension, it is advantageous if the source of force is formed by at least one hydraulic piston which is arranged between the carrier and the cutting plate and which is also connected to the pressure medium supply.

It is also advantageous if the power source is formed by a wedge-actuated screw which is arranged between the carrier and the cutting insert. Alternatively, it is possible if the force source is formed by at least one force screw arranged between the carrier and the cutting insert.

The solution to the problem of maintaining excellent cutting parameters of the cutting tool is to induce the stress applied to the cutting tool. Stress induction is achieved by introducing stresses in the required orientations to provide the required stresses - tensile or compressive - in the directions determined by the cutting tool geometry or in the directions determined by the main cutting movements. Targeted induced stresses in the cutting edge of the insert are intended to ensure that the characteristics of the stress field induced by the action of the chip being removed are counteracted.

The principle of the invention is to induce or induce stress in the volume of the active part of the cutting tool. These stresses are achieved according to the specific cutting technology by acting in the directions and orientations of the forces characteristic of the particular cutting technology. An example of the simplest special stress is the uniaxial compressive stress along the cutting edge of the tool. In some applications, a biaxial stress in the cutting portion of the tool is suitable, and in each axis it may be compressive or tensile. The specific stress direction is usually chosen according to the tool cutting edge geometry, in particular in the direction of the main cutting edge, the direction perpendicular to the tool face or according to technological factors such as the direction of the main cutting force or, for example, the feed direction.

- 1 GB 306972 B6

Clarification of drawings

Fig. 1 is a isometric view of a cutting tool with a one-sided supply; Fig. 2 is a cross-section of this tool; Fig. 3 is an isometric view of a cutting tool with a multilateral supply of pressure medium; . Fig. 5 shows a comparison of the effect of the compression state of the cutting tool due to induction with different types of tool without compression; Figs. 6 and 7 show basic examples of cutting tools in a compression state with hydroplastic clamping of the active part of the cutting tool.

DETAILED DESCRIPTION OF THE INVENTION

The cutting tool according to the invention is formed by one carrier 1, from which the cutting insert 2 protrudes. Between the carrier 1 and the cutting insert 2 there is a force source formed by a hydraulic piston H arranged between the carrier i and the cutting insert 2. supply P of the hydroplastic mass. When the required pressure is controlled, the force of the hydraulic piston 11 is applied to the wall of the cutting insert 2, which results in the biasing of the cutting insert 2 into the required compression state.

Industrial applicability

The tool described according to the invention finds its application particularly in machining materials in mechanical engineering.

Claims (1)

A cutting tool comprising at least one support (1) from which at least one cutting insert (2) extends, characterized in that a force source formed by a hydraulic piston (H) is located between the support (1) and the cutting insert (2). ) arranged between the carrier (1) and the cutting plate (2) and connected to the pressure medium supply (P).