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What are the diamond tools and suitable materials?


As we all know, diamond is the hardest substance in the human world and is fully used in many occupations and fields.

Now in the machining and machine tool profession, diamond is made into the tool used on the machine tool, which solves the ultra-high surface brightness required for machining workpieces such as hard alloy, cubic boron nitride tool, ceramic tool and high speed steel tool. Diamond tools, such as smoothness, ultra-high precision, high hardness and other difficult-to-machine materials, are known as superhard tools or gemstone tools (diamond tools) in the mechanical manufacturing profession.

The old saying goes: "There is no gold in the red, no one is perfect", "the brine is tofu, and one is the one." It means that there is no perfect innocence in the world, and everything has its own interests and shortcomings. Yes, the diamond tool made of diamond is the hardest thing in the world. It is not the workpiece of any data. It is not all hard materials. It is suitable for processing with diamond tools. It also has the scope of processing data.

Let us take a look at the functional features of diamond tools and the classification of the application materials as follows:

Features of diamond cutters

Diamond tools have high hardness, high compressive strength, good thermal conductivity, high wear resistance, very low friction coefficient, and ultra-high finish. Diamond tools are divided into two types: sealed type and brazed type. Brazed forming tools are used to weld diamond data to the shank or other substrate by insert welding. High machining accuracy and improved machining efficiency in high-speed cutting.

Diamond tool function index:

1, the hardness of polycrystalline diamond tools (PCD cutters) can reach 8000HV, 8~12 times that of cemented carbide.

2, polycrystalline diamond tool (PCD tool) thermal conductivity of 700W / mK, 1.5 to 9 times that of cemented carbide, or even higher than PCBN and copper, so PCD cutter heat transfer is agile, with high temperature red hardness.

3, the friction coefficient of diamond tool (PCD tool) is generally only 0.1 ~ 0.3 (the friction coefficient of cemented carbide is 0.4 ~ 1), so PCD tool can significantly reduce the cutting force;

4. The thermal expansion coefficient of diamond cutter (PCD cutter) is only 0.9×10^-6~1.18×10^-6, which is only equivalent to 1/5 of cemented carbide. Therefore, PCD cutter has small thermal deformation and high processing precision;

5. The affinity between the diamond tool (PCD tool) and the non-ferrous metal and non-metal materials is very small. During the processing, the chip is not easy to adhere to the tip of the tool to form a built-up edge.

Classification of the use of diamond tools

For now, the materials suitable for processing with diamond tools are roughly divided into non-ferrous metal materials, non-metal materials, and composite materials. The data breakdown is as follows: