我厂生产的柴油机进、排气门锻件图,如图1所示(括号内为加工尺寸),原来是先在空气锤上拔出杆部,经加热后,再分别在250公斤空气锤、120吨冲床和60吨冲床上进行镦头、切边和切去杆部余料的工作。共需二火,使用三套模具和三台设备。因而,生产效率低,燃油消耗高,占用设备多。 I plant the diesel engine intake and exhaust valve forgings map, shown in Figure 1 (parentheses for the processing size), the original is the first in the air hammer pulled out the rod, after heating, and then in the 250 kg air hammer, 120 tons of punching presses and 60 tons of punching head for heading, trimming and cutting off more than the expected work of the rod. A total of two fires, the use of three sets of molds and three equipment. Thus, low productivity, high fuel consumption, occupy more equipment.