The dynamic stress concentration problems at the swallowtail on a hammer forging die are investigated by using the dynamic photoelastie method. 用动态光弹性法研究了锤锻模燕尾的动态应力集中问题。
It has elaborated the advantages replacing open -die forging with flashless die forging technology. 阐述了用闭式模锻工艺代替开式模锻的优点。