New Type of Cutoff Tools and Hard-Alloy Multifaceted Unresharpenable Plates for Their Equipping

Abstract

Nastasenko VA

Purpose: This paper deals with the sphere of designing and manufacture cutting tools in designing with assembled parting-off cutters equipped with multifaceted unresharpenable plates (MUP).

Methodology: Lathe tools are the most popular among cutting tools and one of the ways of their improvement is to turn to assembled structures with mechanical fixing quickly replaceable multifaceted unresharpenable plates. In the sphere of developing assembled parting-off cutters the most effective technical solutions where found by foreign firms: Sandvik Coromant, Iscar, Horn, Taegu Tec, Mitsubishi and others. The analysis of these constructions show that 2 principles realized here: 1) side fixing of plate to the head of holder body 2) side installation with plate fixing by tacks ore elastic clamps. In the first case multiage plates are used and in the second case one and two edge ones. The simplest variant – is to set standard MUP on lateral side and form. However, such variant is not acceptable as considerable radius of mating lateral faces MUP (r≥ 0,2 mm). To eliminate radius r is possible by making flats m or ark grooves with radius rb at the tap of MUP.

Result: The system of plates of new type is developed – lateral multifaceted unresharpenable plates (LMUP) created basing on standard hard alloy plates. Increase the depth of cutting of from 6,1 to 16,5 mm, relative expense of hart material alloy on one cutting plate edge in 1,1 – 2times superior in mass to the mass base plate.

Originality: New type of cutting plates was developed – lateral multifaceted unresharpened plates (LMUP), their differential feature is the availability of sharp cutting edges on side faces made by additional sharpening along the tops of their flats or arc grooves. These plates of decoding to the Russian Federation patent for the invention �?? 2366542.

Practical value: Suggested LMUP even in minimum trihedral execution are considerably superior to in size-mass characteristics to multiedge bas plates of leading world producers: Sandvik Coromant, Iscar, Horn, Taegutec, Mitsubishi and others which allows to recommend then for wide application.

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