Polycrystalline cubic boron nitride cutting tool

Abstract

The invention discloses a polycrystalline cubic boron nitride cutting tool. The polycrystalline cubic boron nitride cutting tool comprises a tool body, a mounting hole is formed in the center of the upper surface of the tool body, a clamping layer is fixedly connected to the inner wall of the mounting hole, tool bits are arranged at three corners of the tool body, and a groove is formed in one side of each tool bit. Boron nitride coatings are sprayed on the outer surfaces of the tool bits, chip grooves are formed in the two outer side walls of each tool bit, cooling fins are arranged on one sides of the boron nitride coatings, and mounting positioning holes are formed in the upper surface of the tool body. According to the polycrystalline cubic boron nitride cutting tool, the purpose of improving the quality of the tool bits is achieved through the arrangement of the boron nitride coatings, the purposes of improving the chip removal efficiency and preventing chips from being too long and difficult to remove are achieved through the arrangement of the chip grooves and the grooves, the purposes of accurate positioning and firm mounting are achieved through the matched arrangement ofthe clamping layer and the mounting positioning holes, and the purpose of improving the heat dissipation performance of the tool bits is achieved through the arrangement of the cooling fins.

Description

technical field [0001] The invention relates to the technical field of cubic boron nitride, in particular to a polycrystalline cubic boron nitride cutting tool. Background technique [0002] Cutting tools are tools used for cutting in mechanical manufacturing. The vast majority of knives are for machine use, but some are also for hand use. Since the knives used in mechanical manufacturing are basically used to cut metal materials, the term "knife" is generally understood as a metal cutting tool. Knives for cutting wood are called woodworking knives. The material used to make knives must have high high temperature hardness and wear resistance, necessary bending strength, impact toughness and chemical inertness, good processability (cutting, forging and heat treatment, etc.), and not easily deformed. Generally, when the hardness of the material is high, the wear resistance is also high; when the bending strength is high, the impact toughness is also high. But the harder th...

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a polycrystalline cubic boron nitride cutting tool, which has the advantages of improving the hardness of the cutter head, improving the heat dissipation efficiency and improving the installation accuracy, and solves the problems of easy damage of the cutter head, poor heat dissipation efficiency and insufficient installation exact question

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