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Influence of alumina powder on the cutting performance of white corundum

With the wide application of hard and brittle materials such as ceramics, glass and semiconductors in the fields of optics, aerospace, and microelectronics, more and more attention is paid to their precision and ultra-precision processing. The large abrasive grain white corundum has the advantages of high processing efficiency and good wear resistance. The large abrasive grain white corundum after precision trimming can be used for ultra-precision grinding of hard and brittle materials. However, after dressing, the large abrasive particles and the large grinding force are not conducive to reducing the sub-surface damage of the workpiece.

Aiming at this problem in the ultra-precision grinding process of large-abrasive white corundum, a laser processing method based on the surface structuring of large-abrasive white corundum is proposed, which aims to improve the large-abrasive white corundum through the structuring of the surface of the grinding wheel. Grinding performance. Two typical pulsed laser light sources, namely nanosecond laser and femtosecond laser, are used to conduct laser processing experiments on the surface of white corundum. The type of laser light source affects the processing efficiency, processing quality and graphitization of white corundum. After comparison, the LDU5 ultraviolet nanometer is selected. The second pulse laser is used as the processing light source for subsequent experiments. Through the single-grain white corundum micro-groove laser processing technology experiment, the relationship between the groove width, groove depth and laser processing parameters, combined with the large abrasive grain white corundum surface micro-groove laser processing experimental results, select the appropriate process parameters , Finished the surface structuring processing of large abrasive grain white corundum. The online electrolytic sharpening technology (ELID) is used to assist the white corundum grinding and dressing method to dress the large abrasive grained white corundum with structured surface.

Aluminium oxide powder should be avoided during transportation and smelting. It will affect the chemical composition and color of the white corundum sand and reduce the quality of the product. In addition, in order to reduce the aluminum oxide powder flying during the smelting process and stabilize the furnace, it is required The particle size of the alumina powder is as large as possible, and the moisture content is as small as possible. It is more suitable to use sand-like alumina powder as the raw material of white corundum, which can reduce flying losses, improve working conditions, and increase economic benefits.

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June 2024
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