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1. 发明授权

US4006618A Method of producing seamless steel tube 失效
标题翻译：生产无缝钢管的方法
公开(公告)号：US4006618A
公开(公告)日：1977-02-08
申请号：US597812
申请日：1975-07-21
申请人： Samon Yanagimoto , Minoru Kawaharada , Seishiro Yoshiwara , Susumu Mizunuma , Motoaki Sugiyama
发明人： Samon Yanagimoto , Minoru Kawaharada , Seishiro Yoshiwara , Susumu Mizunuma , Motoaki Sugiyama
IPC分类号： B21B17/08 , B21B23/00 , B21B19/04 , B21B37/00
CPC分类号： B21B23/00 , B21B17/08
摘要： In a method of producing seamless steel tube from billet having a square or rectangular cross-section by the step of piercing a workpiece and rolling steps following the piercing step, each of such steps being conducted with a plug held by a mandrel toward the center of cross section of the workpiece while the workpiece is rolled by a pair of rolls with axes arranged horizontally. The piercing step includes guiding the workpiece by a plurality of pairs of guide rolls provided along the rolling line ahead of the rolling rolls as the billet is forced therethrough to maintain the billet in such a position that the hollow shell will not have any nonuniformity of wall thickness and piercing workpiece with a plug as the workpiece is pushed and inserted between the rolling rolls under the forced guidance by a pushing force working in the axial direction, and as the plug progresses into the center of cross section of the workpiece, so as to pierce the workpiece, thereby producing seamless steel tube having very little nonuniformity of the wall thickness.
摘要翻译：在通过穿孔工件和穿孔步骤之后的轧制步骤的具有正方形或矩形横截面的坯料生产无缝钢管的方法中，每一个步骤都是用一个心轴向中心延伸的当工件被水平排列的一对辊轧制时，工件的横截面。穿孔步骤包括当坯料被迫穿过其中时沿着轧制线前面的轧制线设置的多对导向辊来引导工件，以将坯料保持在这样的位置，使得中空壳体不会具有任何不均匀的壁厚度和穿孔工件随着工件被推动并在强制引导下通过在轴向工作的推力而插入轧辊之间，并且当插头进入工件的横截面中心时，以便刺穿工件，从而生产壁厚不均匀的无缝钢管。

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