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The basic knowledge of the tool

Update:17 Jul 2017

??? In the choice of tool angle, the need to consider t […]

??? In the choice of tool angle, the need to consider the impact of a variety of factors, such as workpiece materials, tool materials, processing properties. Generally speaking, the angle of the tool is the angle of the manufacturing and measurement. In the actual work, the angle of the actual work and the angle of the mark are different due to the different position of the tool and the direction of the cutting movement, but usually the difference is very small The
????The material of the tool must have a high hardness and abrasion resistance, the necessary bending strength, impact toughness and chemical inertness, good craftsmanship
??? Usually when the material hardness is high, wear resistance is also high; bending strength is high, the impact toughness is also high. But the higher the hardness of the material, the lower the bending strength and impact toughness. High-speed steel with high bending strength and impact toughness, and good machinability, modern is still the most widely used tool material, followed by carbide.
???? Polycrystalline cubic boron nitride is suitable for cutting high hardness hardened steel and hard cast iron. Polycrystalline diamond is suitable for cutting iron-free metals, alloy, plastic and glass fiber reinforced plastic, etc .; carbon tool steel and alloy tool steel are now only For tools such as rasp, die and tap.
???? Carbide indexable inserts have now been coated with titanium carbide, titanium nitride, aluminum oxide or composite hard layers by chemical vapor deposition. The development of the physical vapor deposition method can be used not only for carbide cutting tools but also for high speed steel tools such as drill bits, hobs, tapes and milling cutters. Hard coating as a barrier to chemical diffusion and heat conduction barrier, so that the cutting tool in the cutting speed slowed down, the life of the coating blade and the coating compared to about 1 to 3 times higher.
???? Due to the high temperature, high pressure, high speed, and work in corrosive fluid medium parts, the application of more and more difficult processing materials, cutting the level of automation and processing accuracy requirements are getting higher and higher. In order to adapt to this situation, the direction of the development of the tool will be the development and application of new tool materials; further development of the tool's vapor deposition coating technology, high toughness in the high strength of the substrate deposited higher hardness coating, better solution Tool material hardness and strength of the contradictions; further development of indexable tool structure; to improve the manufacturing accuracy of the tool to reduce the difference in product quality, and to optimize the use of the tool.

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