What does the principle that cutting dosage chooses when thick, finish machining have to differ

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What does the principle that cutting dosage chooses when thick, finish machining have to differ? Answer: (1) when rough machining, give priority to in order to improve productivity commonly, but also should consider economy and finished cost, choose amount of larger back penetration of a cutting tool and feed normally, use inferior cutting rate; (2) when semifinishing machining and finish machining, answer to fall in the premise that assures to machine quality, efficiency of cutting of give attention to two or morethings, economy and finished cost, choose volume of minor back penetration of a cutting tool and feed normally, choose the cutting tool material with cutting high performance and reasonable geometrical parameter, with raising cutting rate as far as possible. CNC Milling CNC Machining