公开(公告)号：US20150174630A1

公开(公告)日：2015-06-25

申请号：US14416728

申请日：2013-07-24

Applicant: SMS Meer GmbH

Inventor： Uwe Muschalik ,  Jens Magenheimer ,  Anna Rott ,  Koos van Putten

IPC: B21C25/04 ,  F15D1/02 ,  F16L9/22 ,  B21C23/21 ,  F16L9/02

CPC classification number: B21C25/04 ,  B21C23/085 ,  B21C23/205 ,  B21C23/217 ,  B21C25/08

Abstract: If a mandrel for extruding metal pipes, having two axially offset pressing surfaces with different radial embossing and having a transition region between these two pressing surfaces has a support surface in the transition region then the negative effect of narrowing, which arises owing to the mandrel shifting from a first pressing position, in which the first of the two pressing surfaces interacts with a die, to a second pressing position, in which the second pressing surface interacts with the die, can be minimized.

Abstract translation: 如果用于挤压金属管的心轴具有两个具有不同径向压花并且在这两个按压表面之间具有过渡区域的轴向偏移的压紧表面，则在过渡区域中具有支撑表面，然后由于心轴移动而产生变窄的负面影响 从第一按压位置（其中两个按压表面中的第一个压模表面与模具相互作用）到第二压紧位置，其中第二按压表面与模具相互作用可以被最小化。