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图1(见第41页)是我厂产品C630-1车床主轴上的大齿轮的简图及毛坯尺寸(括号内尺寸是齿轮的净尺寸),毛坯重量39公斤,材料45钢。按其形状及其投影面积在5吨模锻锤上锻造比较理想,至少也应在3吨模锻锤上进行。但我厂没有这类大型设备。过去一直利用初锻、终锻二套胎模在2吨蒸汽锤上经过二火锻造成型。第一火镦粗、利用初锻胎模初锻并冲孔;第二火压槽,并利用上盖及终锻胎模闷锻成型。因此,生产效率较低,班产
Figure 1 (see page 41) is a sketch of the gearwheel on the main spindle of our C630-1 lathe and the size of the blank (the size in brackets is the net size of the gear). The weight of the blank is 39 kg and the material 45 is steel. According to its shape and its projected area of 5 tons forging hammer forging ideal, at least should also be on the 3-ton forging hammer. However, I plant no such large-scale equipment. In the past has been the use of initial forging, and finally forging two sets of tire mold in the 2 tons of steam hammer after two fire forging molding. The first fire upsetting, the use of initial forging embryo initial forging and punching; the second fire trough, and the use of the upper cover and forging die forging die. Therefore, the production efficiency is lower and the grade is produced