本文提出预变形模具设计方法，它把模孔形状预先设计成与型材挤压时变形相反的方向，从而获得合格的挤压型材。

In this paper the predeformed designing method has been proposed, according to it, die holes should be predeformed with the direction opposite to that which tend to happen during extrusion practices.

youdao

本文提出预变形模具设计方法，它把模孔形状预先设计成与型材挤压时变形相反的方向，从而获得合格的挤压型材。

In this paper the predeformed designing method has been proposed, according to it, die holes should be predeformed with the direction opposite to that which tend to happen during extrusion practices.

youdao