我厂生产的3NB80泥浆泵,其空气包系受压容器。为提高零件的机械强度,延长使用寿命,工艺由原铸钢件整体浇铸改为锻钢件上下壳体焊接。图1为空气包下壳体零件图,图2为下壳体锻件图。该零件几何形状类似厚壁封头,特点是外径尺寸大、孔深、壁厚、中间有高凸缘,形状特殊,锻造工艺性差,成形难。针对上述问题,我们进行了多次试验,最后在3吨蒸汽锤上采用模锻成形工艺,获得成功。实践证明,合理的出坯尺寸和锻模,是该零件锻造成形的关键。下壳体锻造分四火完工:一、二火:将钢锭切除烧冒口,然后锻成图3形状尺寸的坯件。边缘厚薄要均匀,否则翻边成形后的 The 3NB80 mud pump that I plant produces, its air bag presses the container. In order to improve the mechanical strength of the parts and prolong the service life, the process is changed from the whole casting of the original cast steel parts to the welding of the upper and lower shells of the forged steel parts. Figure 1 shows the parts of the shell under the air bag, Figure 2 shows the forgings of the lower shell. The part geometry is similar to the thick-walled head, characterized by large outer diameter, deep hole, wall thickness, high flange in the middle, special shape, poor forging process and difficult forming. In response to the above problems, we conducted a number of tests, the last three-ton steam hammer on the use of forging forming process, to be successful. Practice has proved that a reasonable billet size and forging die, the key part forging forming. The lower shell forging four fire completed: one or two fire: cut the burning riser steel ingot, and then forged into the shape of Figure 3 blank size. Edge thickness to be uniform, or burring after forming