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(1)有一个燕尾形工件需要刨或铣加工出如图1所示形状,求X尺寸为多少?(刨工、铁工)(2)求图2两相邻孔中心距是多少?(钻工)(3)用一把硬合金切断车刀(图3)进行切断,已知合力为120公斤,合力与P_z力之夹角为30°。求P_z和P_y各为多少公斤并标出径向切削力P_v;画出对工件的反作用力系图。(车工)(4)在车床上使用三爪定心卡盘,夹持工件偏心孔(图4),求垫块高度H应为多少毫米?(可不考虑卡爪
(1) a dovetail-shaped workpiece needs to be shaved or machined out of the shape shown in Figure 1, how much the X size? (Planing, ironwork) (2) Figure 2 two adjacent holes center distance is what? Drill) (3) with a hard alloy cutting tool (Figure 3) to cut off, known to work together to 120 kg, the resultant force and P_z force angle of 30 °. Find P_z and P_y each for how many kilograms and mark the radial cutting force P_v; Draw the reaction force diagram of the workpiece. (Lathe) (4) Use a three-jaw centering chuck on the lathe to hold the workpiece eccentric hole (Figure 4) and ask for the height H of the pad to be mm