A Method of Improving the Horizontal Accuracy of the Lower Support Roller

Abstract

The invention relates to a method for improving the horizontal precision of a lower supporting roller. Before a lower working roller of a rolling machine is replaced, whether the gap between the lowerwork roller and the lower supporting roller is not smaller than 10 mm is determined, when the gap is not smaller than 10 mm, the following operation is carried out, the lower supporting roller is lifted, a hydraulic cylinder is used for pushing a ladder pad to the position, corresponding to an arc cushion plate of the lower supporting roller, of the first-stage pad of the ladder pad, the lower supporting roller descends, the lower supporting roller is separated from the lower work roller, the arc cushion plate of the lower supporting roller sits on the first-stage pad, the lower work roller falls on a roller replacing rail, the lower work roller is replaced through the roller replacing rail, the lower supporting roller is lifted so as to support the lower work roller, the lower work roller is fixed to a roller base, the ladder pad is pushed to the work position through the hydraulic cylinder, the lower supporting roller descends, the arc pad of the lower supporting roller is pressed on the ladder pad, and the subsequent steel rolling procedure is carried out. Through the method, the horizontal precision of the lower supporting roller is improved, the roller replacing safety is improved, the rigidity of the rolling machine is improved, and the intermediate slab edge camber precision is improved.

Description

technical field [0001] The invention relates to the technical field of steel rolling, in particular to a method for improving the horizontal accuracy of a lower support roll. Background technique [0002] The horizontal accuracy of the lower back-up roll is very important to the stiffness of the rolling mill and the camber of the rough-rolled intermediate slab. The foreign matter on the lower step pad and the arc-shaped backing plate directly affects the level of the roll gap. The specific performance is: when there is foreign matter on the lower step pad, The heights on both sides of the roll are different, and the rigidity of the lower roll is poor during rolling, which causes the roll gap to change, and further causes the camber of the intermediate billet. [0003] For a long time, how to reduce the camber of the intermediate billet and improve the rigidity of the rough rolling roll has been an important and difficult point. The levelness accuracy of the lower roll will b...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a method for improving the horizontal accuracy of the lower support roll, which solves or partially solves the problem in the prior art that the horizontal accuracy of the lower support roll cannot be guaranteed when the work roll is changed, which will lead to quality defects in slab rolling technical problem

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