【简答题】车削工件内孔,毛坯内孔直径 d w =100mm ,加工后工件孔直径 d m =106mm ,一次切削完成。已知机床主轴转速 n w =320r/min ,进给速度 v f =mm/min ,车刀几何角度分别为 g 0 =15 °, a 0 =8 °, Kr=45 °, Kr’=30 °, l s=0 °,加工工件材料单位面积切削力 kc=1962N/mm 2 。求主运动速度 Vc 、进给量 ...
【简答题】“The more you learn, the more you earn,” said the pop singer Cyndi Lauper as she accepted her high school diploma(证书) , at the age of 35 ! Although Cyndi made it without a high school degree, most peo...