The machining of non-standard equipment parts requires ultra-lubricated surface and high machining accuracy. This requires the tool to have a high standard life. Whether the tool is worn or not will be based on whether the quality of the machined surface is reduced out of tolerance. The standard life of diamond tools is very high, and the tool wear is very slow during high-speed cutting. Therefore, in ultra-precision cutting, the cutting speed is not restricted by the tool life, which is different from the general cutting rules.
The cutting speed selected for non-standard equipment parts processing practice is often selected according to the dynamic characteristics of the ultra-precision machine tool used and the dynamic characteristics of the cutting system, that is, the rotation speed with the smallest vibration is selected. Since the surface roughness is the smallest at this speed, the processing quality is the highest. Obtaining high-quality non-standard machining surface is the primary problem in the processing of non-standard equipment parts. The use of good quality, especially good dynamic characteristics, ultra-precision machine tools with small vibration can use high cutting speed, and can carry out processing power.
The selection of processing parameters of non-standard equipment parts mainly includes the selection of cutting tool viewpoints, the selection of cutting speed, and the selection of cutting depth and feed rate. From past experience, we know that when processing plastic materials, if a tool with a larger rake angle is selected, the formation of built-up edge can be effectively suppressed. This is when the tool rake angle increases, the cutting force decreases, the cutting deformation is small, and the tool and chips The contact length is shortened, reducing the base formed by the built-up edge.
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