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1. 发明专利

JPS5966919A Manufacture of electric welded tube 失效
标题翻译：电焊管制造
公开(公告)号：JPS5966919A
公开(公告)日：1984-04-16
申请号：JP17745382
申请日：1982-10-07
申请人： Sumitomo Metal Ind Ltd
发明人： NAKANO MASASHI , MATSUFUSA TATSUO , ETOU SHIGEHIDE
IPC分类号： B21C37/30 , B21C37/08
CPC分类号： B21C37/0807
摘要： PURPOSE:To obtain an electric welded tube of roundness by making a sizing roll tube of a prescribed shape pass through, at the final stage of a sizing process in which a welded tube is made to pass through alternately a vertical roll and a horizontal roll, and reducing the tension residual stress in the tube circumferential direction. CONSTITUTION:A sizing roll 7 having a caliber which is horizontally long and elliptical is provided on at least the final stage of a sizing process in which a vertical roll 5a and a horizontal roll 5b are placed alternately on several stages. A welded tube 1b is made to pass through this sizing process, and tension residual stress in the tube circumferential direction is reduced and equalized by the roll 7. In this way, after a hydraulic test, a good roundness is obtained.
摘要翻译：目的：通过使规定形状的定径辊管通过，获得圆形电焊管，在使焊接管交替地穿过垂直辊和水平辊的施胶过程的最后阶段，并减少管周向的张力残余应力。构成：具有水平长和椭圆形的口径的定型辊7设置在其中垂直辊5a和水平辊5b交替地放置在几个台上的施胶过程的至少最后阶段。焊接管1b通过该施胶过程，并且通过辊7减小并均衡管圆周方向上的张力残余应力。以这种方式，在液压试验之后，获得良好的圆度。

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