RU2323067C2 - Built-up cutting tip - Google Patents

Abstract

FIELD: processes and equipment for working metals by cutting, tools with mechanical fastening of cutting tips.

SUBSTANCE: tip includes body in central hole of which insert of construction material in the form of body of revolution is arranged. In order to improve strength of tip and vibration resistance of tool, surface of said central opening joined with insert is provided with latticed riffles and insert is made of copper or aluminum alloy or of alloy steel.

EFFECT: improved strength of tip, enhanced vibration resistance of tool.

2 dwg

Description

The invention "Prefabricated cutting insert" relates to the processing of metals by cutting, in particular to a cutting tool.

Known tools with mechanical fastening of the cutting insert through its hole. One of the drawbacks of these tools is the insufficient vibration resistance of the insert that occurs during processing under the action of cutting forces, which leads to a limitation of technological capabilities and untimely destruction of the cutting edge. In practice, in order to avoid this undesirable phenomenon, the processing parameters are changed, which leads to a decrease in productivity and a deterioration in the quality of the processed surface.

Known methods for increasing the vibration resistance of a tool of this type by improving the mounting mechanism of the cutting insert, as well as the inclusion of vibration damping elements from an elastic material in it [1, 2].

Known prefabricated cutting insert, which contains in the Central hole an insert of structural material in the form of a body of revolution in order to increase strength and expand technological capabilities [3].

Also known is a combined cutting insert containing an insert of a structural material in the form of a body of revolution in the central hole in order to provide a method for attaching the cutting insert through a threaded hole [4].

This technical solution of prefabricated cutting inserts does not affect the increase in vibration resistance of the tool, which is their disadvantage.

The objective of the invention is to increase the resistance of the cutting insert and improve the operational characteristics of the tool by increasing vibration resistance.

This problem is solved by the fact that an insert in the form of a body of revolution with a hole is installed by the method of plating on the corrugated surface of the hole of the cutting insert, which ensures vibration damping. The insert is made of ductile materials such as copper alloy, aluminum alloy and alloy steel. It is established that the use of such inserts increases the vibration resistance of the cutting insert by 5 ... 50%.

The device is illustrated in graphic materials.

Figure 1 shows a cutting plate with mesh corrugation in the hole.

Figure 2 shows a cutting plate with a vibration damping insert.

The device contains:

1 - plate body, 2 - hole in the plate with mesh corrugation, 3 - insert.

The device operates as follows:

Combined cutting insert has a housing 1 with a hole, the surface of which is made with mesh corrugation 2 (figure 1). An insert 3 of plastic material is inserted and mated to the opening of the housing 1 by a plating method (FIG. 2). The inner surface of the insert 3 can be made in the form of a cylinder or any other shape corresponding to the method of attachment. Thus, the loads between the plate fixing mechanism and the plate itself will be transmitted through the insert. The insert material consists of a relatively strong metal with plastic properties, which leads to a significant absorption of the elastic energy of the applied vibrations during the cutting process. In the laboratory, inserts from a copper alloy of the MK brand, an aluminum alloy of the D20 brand, and alloy steel of the 20X grade were tested. Based on experimental studies, it was determined that inserts made of copper alloy increase vibration resistance by 40 ... 50%, of aluminum alloy by 20 ... 30%, of alloy steel by 5-7%.

Using the proposed device will significantly change the vibration load on the prefabricated cutting insert, which will make it possible to improve operational characteristics and increase tool life.

Information sources

1. Copyright certificate SU 1315153 A1, B23B 27/16, 06/07/1987

2. Patent RU 2106228 C1, 6 В23В 27/16, 03/10/1998

3. Patent RU 2038925 C1, 6 В23В 27/00, 27/16, 27/22, 07/09/1995,

4. Patent DE 2935435 A1, B23B 27/16, 03/19/1981

Claims (1)

A prefabricated cutting insert containing an insert in the form of a body of revolution located in the central hole of the body, characterized in that the surface of the central hole mating with the insert is mesh corrugated, and the insert is made of copper or aluminum alloy or alloy steel.

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