公开(公告)号：US4413494A

公开(公告)日：1983-11-08

申请号：US234115

申请日：1981-02-13

申请人： Martin Gilvar ,  Philips Wykes

发明人： Martin Gilvar ,  Philips Wykes

IPC分类号： B21C47/00 ,  B21B13/00 ,  B21B39/00 ,  B21B39/14 ,  B21C47/14 ,  B21D7/08

CPC分类号： B21B39/14 ,  B21B13/005 ,  B21B39/006 ,  B21B2203/22

摘要： In a rolling mill wherein hot rolled rod is directed along a downwardly curved path into a vertical laying head which forms the rod into a series of rings, a method of and apparatus for propelling the rod through the laying head. The rod is passed between a pair of adjustable driven pinch rolls located in advance of the downwardly curved path. An initial closing force is exerted on the pinch rolls to establish an initial parting prior to entry of a rod front end therebetween. The initial parting is sized to produce at least some rod deformation while providing a driving relationship between the pinch rolls and the rod. The initial closing force is greater than the momentary surge in separating force accompanying impact of a rod front end with the pinch rolls. The initial parting is maintained until the rod front end has negotiated the downwardly curved path and has passed through the laying head, at which time the initial closing force is released. The pinch rolls can then either be opened completely to allow the rod to continue running freely therebetween, or the initial closing force can be replaced by a lower secondary closing force which allows the rod to push the pinch rolls apart to a secondary parting. The second parting continues the driving relationship between the pinch rolls and the rod, without any accompanying rod deformation.

摘要翻译： 在其中热轧棒沿着向下弯曲的路径被引导到将杆形成一系列环的垂直铺设头的轧机中，一种通过铺设头推动杆的方法和装置。 杆在位于向下弯曲的路径之前的一对可调节的从动夹送辊之间通过。 在夹紧辊之间施加初始闭合力，以在杆前端进入之前建立初始分型。 初始分型的大小可以产生至少一些杆变形，同时提供夹送辊和杆之间的驱动关系。 初始闭合力大于伴随夹紧辊的杆前端冲击的分离力的瞬时浪涌。 保持初始分型，直到杆前端已经协商了向下弯曲的路径并且已经通过铺设头，此时初始闭合力被释放。 然后可以完全打开夹送辊以允许杆在它们之间自由地继续运行，或者初始闭合力可以由较低的次级关闭力代替，其允许杆将夹送辊推开到第二分离。 第二次分型继续夹紧辊和杆之间的驱动关系，没有任何伴随的杆变形。