过去我们厂成批锻制6135水泵轴,由于该零件杆部细而长又带台阶,用成型模具加工比较困难,操作时工艺要求也比较高,所以我们就用(?)28毫米的原材料锻出头部的形状,但锻件一直不能达到图纸的设计要求。后来我们分析了金属在锻造状态中变形与变形力之间的变形关系,制订了一个“胎模自由挤延法”锻造工 In the past our factory forged 6135 pump shaft in batches, because the parts of the rod thin and long and step, the use of mold processing more difficult, the process requirements are relatively high, so we use (?) 28 mm of raw materials forging Head shape, but forgings have not been able to meet the design requirements of the drawings. Later, we analyzed the deformation of the metal in the forging state and deformation of the relationship between the deformation force, developed a “free-wheeling method” forging workers