随着内燃机车生产的发展,模锻件的产量逐年增加,对模锻件的质量要求不断提高,我厂在缺乏大型模锻设备的情况下,为满足生产需要,利用两吨和三吨自由锻锤进行模锻和半模锻。半模锻是介于模锻与胎模锻之间的一种工艺方法,它的下模固定在砧座上,上模则不固定。上、下模靠导销定位。在起模时,把上模用链条挂在锤头上,靠锤头上升运动带起上模。半模锻与模锻的不同点是,在锤击过程中,上、下模始终合在一起,锻件在模腔中不 With the development of the production of diesel locomotives, the output of die forgings has been increasing year by year, and the quality requirements for die forgings have been continuously improved. In the absence of large die forging equipment, in order to meet the production needs, our factory utilizes two and three tons of free forging hammers Forging and semi-forging. Semi-forging is between die forging and forging a process between the mold, which is fixed in the anvil lower mold, the mold is not fixed. Upper and lower die positioning by the guide pin. In the starting mode, the upper die hanging on the hammer with a chain, lifting the hammer by the upper mold. The difference between semi-forging and forging is that during the hammering process, the upper and lower dies are always together, and the forging is not in the mold cavity