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1. 发明公开

EP1707280A4 METHOD FOR PRODUCING SEAMLESS PIPE 有权
标题翻译：用于生产无缝管
公开(公告)号：EP1707280A4
公开(公告)日：2007-08-29
申请号：EP05703618
申请日：2005-01-14
申请人： SUMITOMO METAL IND
发明人： HAYASHI CHIHIRO
IPC分类号： B21B17/14 , B21B19/04 , B21B19/08 , B21B23/00
CPC分类号： B21B23/00 , B21B17/14 , B21B19/04 , B21B19/08
摘要： A method for producing a seamless pipe in which carburization occurring in the production process of a pipe is prevented and the stretch-rolling process is rationalized. In the process of producing a seamless pipe, a pipe bored in a boring-rolling step is rolled without using an inner surface restricting tool in the stretch-rolling step or without performing stretch-rolling, swaging-rolling is performed in a swaging-rolling step, and wall-thickness machining is performed by means of a cold-rolling machine or a cold-drawing machine in a cold-rolling step. According to the method, trapping of graphite fine particles to the inner/outer surfaces of the pipe caused in conventional stretch-rolling is reduced and carburization of pipe can be prevented. The method is especially effective as a carburization preventive measure of extremely low carbon stainless steel and high alloy steel.

2. 发明公开

EP2318158A1 ROLLING MILL OF ROTATING EXPANDER TYPE FOR TUBULAR BODIES WITH TIP-STABILIZING SYSTEM 有权
标题翻译：技术的旋转扩展器管体的MILL花边稳定系统
公开(公告)号：EP2318158A1
公开(公告)日：2011-05-11
申请号：EP09757469.3
申请日：2009-05-29
申请人： DANIELI & C. OFFICINE MECCANICHE S.p.A.
发明人： CERNUSCHI, Ettore , MARINI, Fabrizio
IPC分类号： B21B19/08 , B21B25/00
CPC分类号： B21B19/08 , B21B25/00
摘要： A rolling mill of rotating expander type for tubular bodies, comprising: working rollers (1, 2) arranged inclined with respect to the rolling axis; a tip (3) fitted on a beam (4), so that the tubular body is pushed in rotation between the rollers and the tip, and subjected to deformation in order to increase the perimeter; a tip-stabilizing system placed behind said tip, about the beam, and integrated in the rolling mill.

3. 发明授权

EP0649354B1 TWO STAGE DIE SET 失效
标题翻译：两阶段MATRITZENSATZ
公开(公告)号：EP0649354B1
公开(公告)日：1998-10-21
申请号：EP93915597.4
申请日：1993-07-09
申请人： Bodnar, Ernest R.
发明人： Bodnar, Ernest R.
IPC分类号： B21D22/04 , B21D28/36 , B21B19/08
CPC分类号： B21D28/36 , B21D22/04
摘要： A two stage die set for sequentially blanking an opening in a work piece, and thereafter forming edges of the work piece around the opening and having a male die assembly (14), having a male blanking die (30), a male forming die (32) spaced from the male blanking die (30), and a recess (34) therebetween, a female die assembly (16) having a generally hollow female die sleeve (52), the die sleeve (52) being shaped and dimensioned to correspond to the shape of the male blanking die (30) and to receive it in telescopic relation, a moveable support plate (64) located around the female die sleeve (52), the moveable plate (64) being biassed so as to urge it into a first extended position, and the moveable plate (64) yielding to the male forming die (32) of the male die assembly (14), when the male and female dies (14, 16) are closed together, so that the male blanking die (30), in co-operation with the female die sleeve (52) blanks out a portion of a work piece (W) and forms an opening, and upon further relative movement between the male and female dies (14, 16) towards one another, the male forming die (32) co-operates with moveable plate (64) and the female die sleeve (52), to cause deformation of an edge portion of the work piece (W) around the opening, ejector apparatus (38) in the male blanking die (30) being resiliently movable, so that it is withdrawn into the blanking die (30), upon closure of the die on a work piece, and, after blanking of the portion of the work piece the ejector (38) is extended from the male die (14), and displaces the blanked out slug portion, and, a passageway (88) in the female die assembly (16) communicating with the female die sleeve (52) for receiving the slug which is then disposed of through the passageway (88).

4. 发明授权

EP2318158B1 ROLLING MILL OF ROTATING EXPANDER TYPE FOR TUBULAR BODIES WITH TIP-STABILIZING SYSTEM 有权
标题翻译：技术的旋转扩展器管体的MILL花边稳定系统
公开(公告)号：EP2318158B1
公开(公告)日：2013-07-10
申请号：EP09757469.3
申请日：2009-05-29
申请人： DANIELI & C. OFFICINE MECCANICHE S.p.A.
发明人： CERNUSCHI, Ettore , MARINI, Fabrizio
IPC分类号： B21B19/08 , B21B25/00
CPC分类号： B21B19/08 , B21B25/00

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