题目

英语翻译
in drawing,the limit of deformation is reached when the lode required to deform the flang becomes greater than the load -carring capacity of the cup wall.the failure site will be in the unwork area near the bottom of the cup wall.the hold-down pressure on top of the blank must be sufficient to keep the material from wrinkling as it goes into the die.

提问时间：2021-01-30

答案

在图中（drawing也可指拉制,吃不准）当使法兰（凸缘）变形所需的负荷（原文lode矿脉讲不通）大于杯壁的负载承载容量时就达到变形的极限,故障点将位于接近杯壁底部的未加工区,毛坯顶部的夹持压力必需足以使材料进入模子时不会起皱.