Hot rolling bar plate scythes bend and bias-running online detection method

Abstract

The invention discloses an online detection method for a hot rolling plate-blank camber and running deviation. The method is that: on the condition of the normal production of a continuous casting machine and a heating furnace, the centerline of the whole heating furnace, namely, the centerline is found out according to the width size of the surrounding of the heating furnace and the width size of the produced plate-blank, and then the horizontal distance from the plate-blank to a fixed point can be respectively measured and compared at the inlet and the outlet of the heating furnace, and continuous measurement is conducted for many times along the length direction of the plate-blank, at last, the graph of the plate-blank camber can be achieved and the intuitive description about the plate-blank camber and the shape of the camber can be realized; therefore, the origin of the problem can be analyzed and the good condition for later workstage rolling can be created.

Description

technical field [0001] The invention relates to a method for on-line detection of whether a slab is deviated during operation in a heating furnace and whether the slab has camber defects. Background technique [0002] In order to ensure rolling in the subsequent process, the slab must be heated to 1100-1250°C in the heating furnace when it comes out of the continuous casting machine, and some even higher. Therefore, during the heating process, due to the high local temperature in the heating furnace, the heating Direct heating of the slab by flames, unreasonable heating model of the heating furnace and other reasons may cause uneven temperature of the slab along the width direction, thermal stress, and camber phenomenon of the slab. Camber refers to the presence of a pronounced bend along the length of the slab. For a long time, the slab camber phenomenon reflected in the slab rolling process of hot rolling mills is very obvious. Due to the lack of effective means and meth...

AI Technical Summary

Problems solved by technology

Due to the lack of effective means and methods, it is difficult to obtain accurate data

In addition, the slab moves under the drive of the furnace roller in the heating furnace. Due to the mismatching factors such as the speed of the furnace roller and the installation accuracy, the slab may cause deviation in the furnace. In severe cases, the furnace must be shut down.

Since there is no better way to detect it, it is difficult to deal with this kind of problem

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