CNC machining tools must adapt to the characteristics of high-speed, high-efficiency, and high degree of automation of CNC machine tools. Generally, they should include general-purpose tools, general-purpose connection tool holders and a small number of special-purpose tool holders. The tool holder must be connected to the tool and mounted on the power head of the machine tool, so it has gradually been standardized and serialized. There are many ways to classify CNC tools. 1. According to the tool structure, it can be divided into: ①Integral type; ②Inlaid type, using welding or machine clamp connection......
Cemented carbide is mainly composed of high-hardness, refractory metal carbides (WC, TiC) micron powders, and cobalt (Co), nickel (Ni), and molybdenum (Mo) as binders. It can be used in a vacuum furnace or hydrogen Powder metallurgy products sintered in a reduction furnace. The carbides, nitrides, borides, etc. of Group IVB, VB, and VIB metals are collectively referred to as hard alloys due to their extremely high hardness and melting point. The following focuses on carbides to illustrate the structure, characteristics and applications of hard gold.
Although we always hope to have both high hardness to ensure the wear resistance of the tool, and high toughness to prevent the tool from chipping, the current technological development has not found such a superior performance tool material. Can't have both. Therefore, we will choose more suitable tool materials in practice according to the needs: the toughness of the tool material is given priority when roughing: the hardness of the tool material is given priority when finishing.
In order to improve the cutting performance of cemented carbide, more than 80% of cemented carbide tools in industrially developed countries have undergone surface coating treatment. Over the past few decades, double-coated, triple-coated and multi-coated composite blades have been developed at home and abroad, and some of them have even reached dozens of layers or hundreds of layers. Cemented carbide coating technology can generally be divided into two categories: chemical vapor deposition (CVD) technology and physical vapor deposition (PVD) technology.
Hard alloy hardness testing mainly uses Rockwell hardness tester to test HRA hardness value. The PHR series portable Rockwell hardness tester is very suitable for testing the hardness of cemented carbide. The weight accuracy of the instrument is the same as that of the desktop Rockwell hardness tester, and it is very convenient to use and carry. Cemented carbide is a kind of metal. The hardness test can reflect the difference in mechanical properties of cemented carbide materials under different chemical composition, structure and heat treatment process conditions......
The parts processed by cemented carbide cutting tools can obtain the required dimensional accuracy and surface quality, which is the most basic processing method in the machinery manufacturing industry. Cutting refers to the method of using tungsten steel cutting tools (carbide cutting tools) to remove the excess material of the processed parts. Cutting using tungsten steel cutting tools occupies an important position in the national economy. In the middle and late Spring and Autumn Period, there was the earliest surviving engineering work "Kaogongji"...
