我车间加工LD5类锻件时,经常发生因开长槽而使零件发生“向内收缩”和剪刀式翘曲”现象。其中以“向内收缩”危害最大,常造成零件外形尺寸“缺肉”而不符合产品图纸。例如生产某大梁接头时,由于加工长槽零件内收缩变形严重,致使外形尺寸L收缩达3.8毫米,详见表1。产生上述变形的主要原因在于锻件的残余应力太 When machining LD5 forgings in our workshop, the phenomenon of “inward shrinkage” and scissor warpage often occur due to the long grooves, of which “inward shrinkage” is the most damaging and often leads to parts lacking in dimensions But does not meet the product drawings.For example, the production of a girder joints, due to the processing of long groove parts contraction and serious, resulting in the shrinkage of dimensions L 3.8 mm, as shown in Table 1. The main reason for the deformation is the forging residual stress too