(1) When the machined workpiece is too high, it should be roughened with different length of knife in layers. After using a large knife for roughening, the residual material should be removed with a small knife.
(2) The flat bottomed cutter is used to process the plane, and the ball cutter is used less so as to reduce the processing time; if there is a slope and it is an integer, it should be processed with a slope cutter.
(3) The reasonable setting of tolerance can balance the machining accuracy and the computer calculation time, do more procedures, and reduce the idle tool time.
(4) If the hardness of the blank material is high, the reverse milling is selected; if the hardness of the blank material is low, the down milling is selected. Rough machining up milling, finish machining down milling.
(5) The tool material has good toughness and low hardness, which is suitable for rough machining, while the tool material with poor toughness and high hardness is suitable for finish machining.
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