By analyzing the contact area between the Upper Die and cylindrical solid workpiece during Orbital Forming process, an approximate formula for calculating the contact area rate is proposed.
通过对摆辗加工中摆头与圆柱实心工件接触面积的分析，给出了计算其接触面积率的近似公式。
Because stress and temperature around the die land is higher than others else, the die land will become a main area of die invalidation.
由于模具工作带附近的应力和温度均较其它部位大，从而使得模具工作带成为挤出模具失效的主要区域。
As per discussion there is 72 preliminary die drawing as attached file . Please advise which are critical area and dimension that IEC have to pay special attention .
附件里面是先前的72种设计的草图。请告知IEC所特别关注的区域和尺寸！
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