公开(公告)号：US4608850A

公开(公告)日：1986-09-02

申请号：US775344

申请日：1985-09-12

申请人： John A. Ballantyne ,  William L. Otto, Jr.

发明人： John A. Ballantyne ,  William L. Otto, Jr.

IPC分类号： B21B1/06 ,  B21B31/20

CPC分类号： B21B1/06 ,  B21B2263/16

摘要： A method of operating a rolling mill in a manner that avoids the occurrence of alligatoring in a slab of metal as it is reduced in thickness in the mill. The slab is subject to a schedule of repeated passes through the mill to effect a predetermined amount of reduction in thickness of the slab in each pass. The method comprises the steps of analyzing the pass schedule of such a slab, and noting any pass in the schedule that has a combination of entry gauge and reduction draft that may subject the slab to alligatoring. An untapered nose of the slab is next presented to the bite of the mill, and if the combination of entry gauge and reduction draft is one that is not subject to alligatoring, the slab is passed through the mill to reduce its thickness as scheduled. However, if the combination of entry gauge and reduction draft is one that causes or tends to cause alligatoring in the slab, the method changes the size of the working gap of the mill by an amount that changes the combination of entry gauge and reduction draft to one that does not subject the slab to alligatoring. The nose of the slab is then directed to the bite of the mill having the changed working gap, and, once the nose of the slab has entered the bite of the mill, the working gap thereof is returned to the size that will effect the schedule reduction and thickness of the slab.

摘要翻译： 一种轧制机的操作方法，其可以避免在轧制机中厚度减小时金属板块中出现鳄鱼皮的发生。 板坯经受重复通过轧机的时间表，以在每次通过中实现预定量的板坯厚度的减小。 该方法包括以下步骤：分析这种板坯的通行进度，并注意到具有可能使板坯进行鳄鱼化的入口规格和还原吃水的组合的进度表中的任何通过。 板坯的未开口的鼻子接下来呈现给研磨机的咬口，并且如果进样量计和还原气流的组合是不经过鳄鱼的，则将板坯通过磨机以按计划减小其厚度。 然而，如果进样量计和还原气流的组合是导致或倾向于在板坯中引起鳄鱼的组合，则该方法将磨机的工作间隙的大小改变为将进样量计和还原气流的组合改变为 一个不会使板块变成鳄鱼皮。 然后将板坯的鼻子导向具有变化的工作间隙的轧机的咬入口，并且一旦板坯的鼻部进入轧机的咬合状态，其工作间隙将恢复到将影响时间表的尺寸 板坯的减薄和厚度。