过去,我厂在锻造图1所示的吊环(工件材料为45钢)时,是在250公斤空气锤上采用胎模锻锻出的。但是中间8毫米凸筋锻不出来,因而给机械加工带来了很多困难。后来改进了胎模和锻造工艺,解决了上述问题,并且使材料消耗 In the past, my factory forging the rings shown in Figure 1 (the workpiece material is 45 steel), is forged on a 250 kg air hammer using a tire forging. However, the middle 8 mm rib can not be forged, which brings a lot of difficulties to the machining. Later, the improvement of the mold and forging process, to solve the above problems, and make the material consumption