汽室阀体一般由阀体圈和尾部两个锻造毛坯,经粗车后再焊接成一体。用这种方法制成的锻坯加工余量大,费工费料,工件质量差。后来我厂改在3吨自由锻锤上用胎模复合挤压的新工艺进行整体锻造,收到满意的效果,其工件见图a。阀体的整体锻造,节约了钢材,实现了全纤维锻造,提高了零件的内在质量。若按年产50台机车,每年可节约6千元。 Steam chamber valve body and tail by the general two forging rough, after the rough car and then welded into one. Forged blanks made by this method have large machining allowances, expensive materials and poor work quality. Later, I plant to 3 tons of free forging hammer die with a new composite extrusion process forging the whole, received satisfactory results, the workpiece shown in Figure a. The overall body forging, saving steel, to achieve a full fiber forging, improve the inherent quality of the parts. If the annual output of 50 locomotives, annual savings of 6,000 yuan.