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1. 发明申请

WO2004103603A1 PRODUCTION OF CLAD PIPES 审中-公开
标题翻译：生产管道
公开(公告)号：WO2004103603A1
公开(公告)日：2004-12-02
申请号：PCT/AU2004/000672
申请日：2004-05-20
申请人： CLADTEK INTERNATIONAL PTY LTD , MONTAGUE, Paul, Anthony
发明人： MONTAGUE, Paul, Anthony
IPC分类号： B21D39/04
CPC分类号： B21C37/154 , B21D39/04 , B21D39/20 , Y10T29/4994
摘要： A method of manufacturing a tubular structure such as a clad pipe (10) having inner and outer pipe sections (11, 13) with an interference fit therebetween and also a clad pipe (10) manufactured in accordance with that method. The method comprises the following steps: (a) positioning two pipe sections one within the other to provide an assembly (15) comprising the inner pipe section (11) and the outer pipe section (13); (b) radially expanding a portion of the inner pipe section (11) into engagement with the surrounding portion of the outer pipe section (13) using an expansion tool (17); (c) continuing to radially expand said portion of the inner pipe section (11) to plastically expand said portion of the inner pipe section (13) and elastically expand the surrounding portion of the outer pipe section (13); and (d) repeating steps (b) and (c) for one or more further portions of the inner pipe section (11). Because the inner pipe section (11) is radially expanded into a condition which it undergoes plastic deformation and the outer pipe section (13) is radially expanded to undergo elastic but not plastic deformation, interference between the inner and outer pipe sections is achieved due to the residual tensile stress in the outer pipe section (13) and the residual compression stress in the inner pipe section (11). The method may also involve establishing a metallurgical bond between the confronting surfaces of the two pipe sections (11, 13).
摘要翻译：一种制造管状结构的方法，例如包覆管（10），其内部和外部管段（11,13）与其间具有过盈配合，并且还包括根据该方法制造的复合管（10）。该方法包括以下步骤：（a）将两个管段定位在另一管内，以提供包括内管段（11）和外管段（13）的组件（15）。（b）使用膨胀工具（17）将所述内管段（11）的一部分径向膨胀成与所述外管段（13）的周围部分接合; （c）继续使所述内管部分（11）的所述部分径向膨胀，以使所述内管部分（13）的所述部分塑性膨胀并使所述外管部分（13）的周围部分弹性膨胀; 和（d）对于内管段（11）的一个或多个其它部分重复步骤（b）和（c）。由于内管部（11）径向膨胀成其发生塑性变形的状态，外管部（13）径向膨胀以发生弹性而不产生塑性变形，因此，由于内管部外管部（13）中的残余拉伸应力和内管部（11）中的残留压缩应力。该方法还可以涉及在两个管段（11,13）的相对表面之间建立冶金结合。

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