Manufacturing method of mechanical machining tool

Abstract

The invention provides a manufacturing method of a mechanical machining tool. The method comprises the steps that electrofusion sintering is carried out on hard alloy powder or ceramic powder, then, a breaking method is utilized for obtaining powder with the granularity ranging from 10 micrometers to 25 micrometers, and dried powder is conveyed to plasma spraying equipment; smooth treatment is carried out on a template surface, and therefore the roughness of the template surface is smaller than or equal to 1.5 micrometers; and then, dry air is utilized for cleaning the template surface, and a high-temperature coating is directly used or coated. Compared with an existing powder metallurgical hot-pressing method, in terms of material preparation, adding of binding agents and other additional materials such as polyvinyl alcohol, cellulose ether and amylum starch can be reduced; in terms of the technology, a preliminary forming step before hot pressing and a technological step of removing extra added materials can be removed; and in terms of a structure, the tool which is uniform in porosity, consistent in density and uniform in strength can be obtained, and in terms of performance, hardness, toughness, self-lubricating performance, self-blade performance and wear resistance of the tool can be improved.

Description

technical field [0001] The invention relates to a preparation method of a machining tool and belongs to the technical field of machinery. Background technique [0002] In short, the above characteristics of the tool preparation method determine that the tool production process is complex, there are many additives or other substances, and some additives need to be removed during the preparation process, and the coating preparation on the surface of the tool increases the production cost. In addition, problems in the complex production control steps of the process will easily lead to a decline in the quality of the tool or unqualified, and the yield of the tool is not high. There are many factors affecting the cost of machining. Cost-effective cutting tools are the key to reducing processing costs. Reducing the amount of lubricating fluid is also one of the important factors. Therefore, self-lubricating high-strength and tough cutting tools have become the development trend of...

AI Technical Summary

Problems solved by technology

At present, the knives prepared by powder metallurgy hot pressing method have uneven porosity, inconsistent density, and uneven strength.

Thermal spraying technology is mostly used for surface strengthening and surface modification, such as spraying a layer of coating on the surface of the metal substrate of high-speed steel tools to improve the wear resistance, corrosion resistance, high temperature oxidation resistance, electrical insulation, heat insulation, radiation protection, properties such as wear reduction and sealing, but there is no relevant literature and patent information to explain that thermal spraying technology directly prepares the tool body or matrix