Method for preventing slab from sliding at inlet of fixed width machine

Abstract

The invention provides a method for preventing a slab from sliding at the inlet of a fixed width machine and relates to the technical field of hot rolling. The method comprises the steps of measuring the elevation values of an inlet roll way and an inlet lower pinch roll of the fixed width machine under the condition of the same base point to obtain an elevation difference; when the elevation value of the inlet lower pinch roll is smaller than that of the inlet roll way of the fixed width machine, selecting and mounting a gasket with the preset thickness under a bearing block of the inlet lower pinch roll according to the elevation difference, and re-measuring the elevation value; when the difference between the elevation values is smaller than the target preset elevation value, reselecting the gasket with the different preset thickness. The elevation value of the inlet lower pinch roll is improved, so after a kowtow slab enters the inlet lower pinch roll of the fixed width machine, even if the kowtow position is lapped on an inlet lower guide roll of the fixed width machine and a rear slab is raised, the inlet lower pinch roll of the fixed width machine can be kept contacted with the slab, so the kowtow slab can be effectively prevented from skidding at the inlet lower pinch roll of the fixed width machine.

Description

technical field [0001] The invention relates to the technical field of hot rolling, in particular to a method for preventing a slab from slipping at the entrance of a sizing machine. Background technique [0002] Width sizing machine is the main width adjustment equipment of hot rolling production line. Changing the slab width of the slab continuous casting machine is relatively complicated, and the large reduction capacity of the fixed width machine can meet the needs of different width specifications of hot-rolled strip steel. The use of the sizing machine can not only greatly improve the production efficiency of continuous casting, but also avoid the "dog bone" defect raised by the vertical roll, making the sizing machine more and more widely used in the hot rolling production line. [0003] At present, due to various factors such as continuous casting process, improper stacking of slab warehouse, large temperature difference between the upper and lower surfaces of the h...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned technical problems, the object of the present invention is to provide a method for preventing the slipping of the kowtow slab at the entrance of the width-fixing machine. It does not need to be equipped with special equipment and tools. Slipping problem at the entrance of fixed width machine

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