公开(公告)号：US6131431A

公开(公告)日：2000-10-17

申请号：US49181

申请日：1998-03-27

申请人： Hiroshi Ona

发明人： Hiroshi Ona

IPC分类号： B21C47/02 ,  B21C37/06 ,  B21C37/08 ,  B21C37/083 ,  B21D5/12 ,  B29C53/48

CPC分类号： B29C53/48 ,  B21C37/06 ,  B21C37/083 ,  B21D5/12

摘要： There is disclosed a pipe member rolled up as a coil and roll-formed, the pipe member made of material having a spring-back characteristics and having a specific residual stress distribution existing along a direction perpendicular to the rolling-up direction of said pipe member, the specific residual stress distribution being formed by being wounded around a longitudinal direction thereof by roll-forming, and when the member is unfurled out, two longitudinal edge portions of the member being overlapped to each other thus forming a pipe shape.

摘要翻译： 公开了一种作为卷材卷成的管件，由具有回弹特性且具有特定的残余应力分布的材料制成的管件，其沿与所述管件的卷起方向垂直的方向存在 特定的残余应力分布是通过辊轧形成在其纵向方向上而形成的，并且当该部件展开时，该部件的两个纵向边缘部分彼此重叠，从而形成管状。