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4.4 Comprehensive Practice Questions
Write the processing program of the parts shown in Figure 4-6 and process them, and select three turning tools according to the processing requirements, No. 1 tool turning outer circle, No. 2 knife groove, No. 3 knife turning thread. It is required to correctly select the tool change point to avoid collision between the machine tool and the workpiece and fixture during tool change. Tool change point is selected as A(200,350) point. The cutting amount is: the spindle speed (rpm) is 630, 315 and 200 respectively in the outer circle, groove and thread. The feed speed F (mm/min) is 150, 160 and 150 respectively in the outer circle, groove and thread.