A Method of Controlling the Slab Width Using the Gap Measurement of Vertical Rollers in Reverse Pass of Rough Rolling

Abstract

In view of the fact that conventional rough-rolling vertical rollers adopt the method of empty pass during reverse rolling without carrying out width control on the strip steel, the method of the present invention is to adopt the small rolling force control mode for the vertical rollers during the rough-rolling reverse rolling. The vertical roll is rolled and the roll gap is measured, and the slab width is calculated according to the roll gap model. Use this width to re-set the rough rolling width and learn the widening model. The method can solve the problem that accurate width measurement data cannot be obtained in the middle pass of rough rolling at present, and accurately provide the slab entrance width re-set and calculated during the rough rolling process, thereby improving the final rough rolling width accuracy.

Description

technical field

[0001] The present invention relates to the technical field of steel rolling control. Specifically, the present invention relates to the use of the small rolling force control of the vertical rollers in the reverse pass of rough rolling, and the measurement of the width of the slab through the roll gap of the vertical rollers, so as to more reasonably carry out the middle pass of rough rolling. Slab width control and model learning ensure the accuracy of slab width control. Background technique

[0002] Due to factors such as investment and measurement environment, generally hot rolling production lines are equipped with width measuring instruments only at the rough rolling exit during the rough rolling stage. However, the slab width control in rough rolling is often multiple passes, and the slab width in the middle pass can only be estimated by the model. This method restricts the further improvement of the width control precision of the rough-rolled slab. ...

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