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1.选择合理的切削用量 1. Select reasonable cutting dosage 经济有效的加工方式必然是合理的选择了切削条件，切削速度、进给量和切深会直接引起刀具的损伤，切削速度如果提高，则刀尖温度就会上升，会产生机械、化学、热的磨损。一般切削速度提高20%，则刀具寿命会减少1/2。 Economic and effective processing way is necessarily reasonable selection of the cutting conditions, cutting speed, feed and cutting depth will directly cause the damage of the cutting tool, cutting speed, if increase, the blade temperature will rise, will produce mechanical, chemical, thermal wear. The average cutting speed increased by 20%, cutting tool life by a factor of two. 用户要根据被加工的材料、硬度、切削状态、材料种类、进给量以及切深等，来选择使用合适的切削速度，有规则的、稳定的磨损是理想条件。 According to users of processed material, hardness, cutting condition, material type, feed and cutting depth etc., to select and use appropriate cutting speed, regular, stable wear is the ideal condition. 2.合理选择刀具 2. Reasonable selection of knives (1)粗车时，要选强度高、耐用度好的刀具，以便满足粗车时的要求。 (1) when heavy vehicles are used, select the tool with high strength and durability to meet the requirements of the rough car. (2)精车时，要选精度高、耐用度好的刀具，以保证加工精度的要求。 (2) in fine car, choose the tool with high precision and good durability to ensure the processing precision. (3)为了减少换刀时间和方便对刀，应尽量采用机夹刀和机夹刀片。 (3) in order to reduce the time and convenience of changing the knife, use machine clamping knife and machine clamp blade as far as possible. 3.合理选择夹具 3. Reasonable selection of fixtures (1)尽量选用通用夹具来装夹工件，不要采用专用夹具。 (1) try to use the generic fixture to install the fixture and not use a special fixture. (2)零件定位基准应重合，从而减少定位误差。 (2) the positioning datum of the parts should coincide, thus reducing the positioning error. 4.确定加工路线 4. Determine the processing route