Numerical control turning ultra-hard blade with V-shaped cubic boron nitride cutting units

Abstract

The invention provides a numerical control turning ultra-hard blade with V-shaped cubic boron nitride cutting units, and belongs to the technical field of metal cutting tools. The numerical control turning ultra-hard blade is formed by welding the cubic boron nitride cutting units to a hard alloy base body. The cubic boron nitride cutting units are the V-shaped cubic boron nitride cutting units, the upper end face and the lower end face of the hard alloy base body are each provided with two acute angles, each acute angle is provided with one V-shaped cubic boron nitride cutting unit, V-shaped protrusions are arranged on the hard alloy base body, the V-shaped cubic boron nitride cutting units stretch across the V-shaped protrusions, and the inner walls of the V-shaped cubic boron nitride cutting units are attached to the V-shaped protrusions. By the adoption of the V-shaped cubic boron nitride cutting units, the section welding area is increased, welding strength is improved, and the cutting toughness and impact force resistance of the blade are improved. The area of the upper end faces of the cubic boron nitride cutting units is reduced, a round cubic boron nitride composite sheet blank can be cut into more V-shaped cubic boron nitride cutting units under the condition of the certain area, resources are saved, and waste is reduced.

Description

technical field [0001] The invention relates to an indexable numerically controlled turning superhard insert with a V-shaped cubic boron nitride cutting unit for finishing high-hardness metal materials, and belongs to the technical field of metal cutting tools. Background technique [0002] Conventional cubic boron nitride inserts are composed of non-groove conventional cubic boron nitride cutting units welded on the cemented carbide substrate. In the processing of high-hard metal materials, non-groove turning superhard Performing dry cutting as an alternative to the grinding process, these inserts have only negative lands at the front of the cutting edge. Although this type of insert has the characteristics of small size, high hardness, strong wear resistance of the cutting edge, and strong versatility, due to its simple rake face, large waste area, no tip inclination, and too many cutting areas, there are High production cost, small welding area, poor toughness, high cutt...

AI Technical Summary

Problems solved by technology

Although this type of insert has the characteristics of small size, high hardness, strong wear resistance of the cutting edge, and strong versatility, due to its simple rake face, large waste area, no tip inclination, and too many cutting areas, there are High production cost, small welding area, poor toughness, high cutting resistance, too long cutting residue, too high blade tip temperature and other defects that affect the life of the blade, especially in the cutting process of high hardness and high viscosity metal materials. High cutting temperature , serious cutting hardening, easy to form built-up edge, high resistance to plastic deformation, and difficult to guarantee surface quality and precision, etc., failed to fully utilize the characteristics of cubic boron nitride materials in the processing process in the most reasonable and material-saving way

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