One of the main goals of high-speed cutting is to reduce production costs through high productivity, and improve overall competitiveness by shortening production time and delivery time. It is mainly used in finishing processes. From the research of high-speed cutting mechanism, we see that with the increase of cutting speed, the metal removal rate has been greatly improved. The high strain rate of the material makes the chip forming process and the gap between the tool and the workpiece The various phenomena that occur on the contact surface are different from those under traditional cutting conditions. In order to achieve high-speed cutting, tool material, cutting oil, and tool path become the key to solving the problem. Yida Borun will briefly introduce the types of cutting tools.
one ,High-speed steel and non-coated carbide tools
Generally speaking, low-performance tools, such as high-speed steel and uncoated cemented carbide, are widely used in ordinary cutting, but their high-speed performance is not good. High-performance tools, such as polycrystalline diamond tools, are the hardest of all tool materials, and have very high wear resistance and speed capabilities. Cutting heat has little effect on it. In high-speed processing of non-ferrous and non-metallic materials Time fully embodies its superiority. But it has poor impact resistance and poor thermal performance when cutting steel and cast iron materials. Because in high-speed cutting of ferrous metals, the carbon atoms in the tool material will diffuse to the workpiece, causing increased tool wear.
Two, Carbide tool
Carbide cutting tools have the largest application volume, accounting for 80% of the total sales of various cutting tools. 90% of normal speed metal cutting uses cemented carbide tools. Cemented carbide has good impact toughness, but its high-speed performance is not good. In addition, high-speed cutting tools must have extremely high thermal hardness and chemical stability, and cemented carbide cannot meet the requirements in this regard.
Three, CBN tool
CBN tool has excellent heat resistance and can cut hard materials at high temperatures, but it is expensive and cannot process soft metal materials. The aluminum-based ceramic material with good chemical stability is just suitable for this kind of processing, but it lacks thermal hardness and cannot be used for high-speed processing.
Four, coated carbide tools
Coated carbide tools suitable for high-speed cutting. Due to the use of coating materials with good heat resistance and high hardness and multi-layer coating technology, the coated carbide tools have a large cutting range and long life. The performance is much better than uncoated cemented carbide. Therefore, coated cemented carbide has a tendency to replace ordinary uncoated cemented carbide.
tool coating technology can be used not only on hardened alloy tools, but also on other tool materials, such as cermets, ceramics, etc.
Five, ceramic knives
Ceramic tools are also tools that can be used for high-speed cutting, and are an important part of the research and development of tool materials in recent years. The whisker-reinforced ceramic tool is a tool made of special materials. It is suitable for high-speed machining due to its good impact resistance and strong thermal shock resistance.
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