1.填写图1中刀具角度的符号、名称和工件上的三个表面。2.车削一工件,直径D=150毫米,长度L=300毫米,走刀量S=0.5毫米/转,主轴转速n=300转/分,求切削速度V和车削一刀所需时间。3.采用差动分度法加工229等分的工件,试求每次分度时分度手柄转数n和挂轮齿数?分度手柄和分度盘 1. Fill in the symbol, name and three surfaces on the workpiece in Figure 1 for the tool angle. 2. Turning a workpiece, diameter D = 150 mm, length L = 300 mm, the amount of cutting S = 0.5 mm / rev, the spindle speed n = 300 rev / min, the cutting speed V and turning a knife required time. 3. Using differential indexing process 229 equal parts of the workpiece, try each sub-indexing handle rotation number n and the number of gear teeth? Indexing handle and indexing plate