汽车起重机上有许多锻件,形状比较复杂,重量适中,宜于用模锻方法生产。我厂过去采用自由锻锤上胎模锻的方法生产,这种工艺有:锻件质量低,模具寿命短和工人劳动强度大等缺点。现根据我厂当前的生产批量,选择比较经济合理的措施,由胎膜锻改为在螺旋压力机上模锻工艺,我厂自行设计和制造了一台500吨双盘摩擦压力机(见图1)。该机于 There are many forgings on the truck crane. The shape of the crane is complex and the weight is moderate. It is suitable for production by die forging. In the past, our factory used the method of free forging hammer upper tire forging. This process has the following disadvantages: low forging quality, short die life and labor intensity of workers. Now according to the current production volume of our factory, choose more economic and reasonable measures, from forging film to forging technology in the screw press. Our factory designed and manufactured a 500-ton double disc friction press (see Figure 1). ). The aircraft