我厂生产的立放运井架车液压缸下缸盖外形较复杂,自由锻造既费工又费料,而且锻件质量差,机械加工很麻烦。后来改在两吨自由锻锤上进行胎模锻造获得成功。锻件的单件重量由自由锻件的60公斤下降到胎模锻件的42公斤,单件节约钢材18公斤。按年产100件计,每年可节约锻造费用3600余元,而且锻件的加工余量较小,减少了机械加工工时,从而降低了 I plant the production and delivery of derrick cylinder hydraulic cylinder head shape is more complex, free forging both costly and expensive materials, and forgings of poor quality, machining is very troublesome. Later changed to two tons of free forging hammer tire forging success. The weight of a single piece of forgings is reduced from 60 kg for free forgings to 42 kg for forgings and 18 kg for single pieces. According to the annual output of 100 pieces, annual forging costs can be saved more than 3600 yuan, and forging smaller allowances, reducing the machining time, thereby reducing the