在制造内孔一端为月牙形(也叫腰圓孔)的零件(c图所示)时,美刊介绍了一种既不用拉削又不用铣削,而是采用挤压成形的新颖工艺,其加工过程如下: 若工件材料为0-1工具钢,加工后要淬硬。(1)先加工到图a,此时台阶孔左端的小孔直径必须经过计算,以保证其圆截面积与月牙形面 When making a part with a crescent (also called a round hole) at one end of the bore (c), the American Journal introduced a novel process that uses both extrusion and broaching without broaching and without milling Processing is as follows: If the workpiece material 0-1 tool steel, hardened after processing. (1) first processed to Figure a, then the diameter of the hole at the left end of the step hole must be calculated to ensure that its circular cross-sectional area and the crescent-shaped surface