一、加工对象广州钢琴厂平均每日要车削如图1所示零件的两端圆弧头约17000件。毛胚是冷拉45号钢,一般硬度为Rc35,但有时Rc45的也有,用剪床剪断下料。该厂原先采用如图2所示的整体三刃旋风切刀。三刃旋风切刀装在工厂自制的专用自动机上,工件夹紧不 First, the object of processing The average daily piano factory in Guangzhou to turn as shown in Figure 1 shows the arc ends of about 17,000 pieces. Blank is cold drawn 45 steel, the general hardness of Rc35, but sometimes there are Rc45, cut with a shear bed cutting. The factory originally used as shown in Figure 2 as a whole three-blade whirlwind cutter. Three-blade whirlwind cutter installed in the factory-made special automatic machine, workpiece clamping is not