锻工车间在模锻锤上锻造直径80毫米以下,高度23毫米以下的圆锥外套,以往一直存在着大小端面裂纹。该裂纹在锻件上因有氧化皮包裹着,直接看不出来,经过下工序车削之后,才能检查出来。因大小端面产生裂纹而报废的平均为8％,有时甚至一批零件中废品达到40％,严重影响生产。 经过反复多次的试验,改进了模具的结构,终于使大小端面裂纹被消灭,突破了这一技术关键。 Forging workshop in the forging hammer forging diameter of 80 mm below the height of 23 mm conical jacket, in the past there has always been the size of face cracks. The crack in the forging due to oxide wrapped, can not directly see through the next process of turning, to check out. Because of the size of the surface cracks and the average retirement of 8%, and sometimes even a batch of parts reached 40% of waste, seriously affecting the production. After repeated tests, to improve the structure of the mold, and finally the size of the surface cracks have been eliminated, breaking the key technology.