Key words diamond tool|2020-08-10 10:46:32
Abstract Diamond tools can be used for precision machining of non-metallic hard and brittle materials such as graphite, high wear resistance materials, composite materials, high silicon aluminum alloys and other tough non-ferrous metal materials. There are many types of diamond tools with significant performance differences. The structure, preparation methods and application fields of different types of tools...
Diamond tools can be used for precision processing of non-metallic hard and brittle materials such as graphite, high wear-resistant materials, composite materials, high silicon aluminum alloys and other tough non-ferrous metal materials. There are many types of diamond tools with significant performance differences. Different types of tools have different structures, preparation methods and application fields, resulting in large differences in the wear resistance of diamond tools.
Wear resistance of diamond tools
When a diamond tool cuts copper, the crater wear on the rake face of the tool is caused by the oxidation of the diamond by the catalytic action of copper, and the cutting edge of the tool is in full contact with the workpiece without any gaps without oxidation wear; When the tool cuts aluminum, aluminum carbide is generated due to the direct contact between the working surface and the tool surface. The workpiece material is removed by the cutting edge and the cutting edge is worn. However, the direction of wear is opposite to that of copper cutting (extends from the cutting edge to the flank ), so there will be no crater wear on the rake face.
What is the convenience of diamond tool wear
Common diamond tool wear includes rake face wear and flank wear. With the continuous extension of the cutting time of the diamond tool in the factory, the temperature of the cutting area continues to rise, because the diamond tool is constantly working, when the thermochemical reaction temperature is reached, a new metamorphic layer will be formed on the surface of the tool. The metamorphic layers are mostly oxides and carbides with very poor strength, which continue to form, disappear with the chips, and gradually form a worn surface. Under the continuous action of the cutting force, especially the alternating pulse load, of the diamond crystal tool, one C atom after another gets enough energy and escapes from the crystal lattice, causing crystal defects, and the gravitational force between the atoms is weakened. Under the action of external force, the crystal lattice Shearing and spalling occur between them, and the wear of the lattice level is gradually formed. After a certain amount of the lattice level is worn, the wear surface of the tool will gradually form.
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Henry Wang | Quote Manager
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