Method for controlling rough rolling squat in continuous hot rolling strip

Abstract

The invention discloses a method for controlling a rough rolling squat in a continuous hot rolling strip. By means of the method, the production efficiency is improved, and the squat in a rolling plate is avoided. According to the method, when plate billets are rolled continuously, a speed difference delta V between an upper working roll and a lower working roll of a rolling mill is determined during rolling process of a roughing mill corresponding to an upper-lower temperature difference delta T of the different plate billets when the plate billets are discharged out of a furnace at a heating stage; then according to the speed difference delta V between the upper working roll and the lower working roll of the rolling mill during a practical production process, revolving speeds of the upper working roll and the lower working roll of the rolling mill are set; so that the squat does not occur on the plate billets during the rolling process; it is not necessary to stop the rolling mill to conduct adjustment and heating treatment on the upper surfaces and the lower surfaces of the plate billets; by the adoption of the method for controlling the rough rolling squat in the continuous hot rolling strip, the product quality is improved, the production efficiency is improved, and the manufacturing cost is lowered.

Description

technical field [0001] The invention relates to the technical field of steel rolling control, in particular to a method for controlling warping in rough rolling of hot continuous strip steel. Background technique [0002] It is well known that during the rough rolling of hot continuous rolling coils, the problem of head bending is a common problem in the production of hot continuous rolling coils. The upward bending of the head is called "warping head", and the downward bending is called "button head". When the head warping is too large, the rolled piece is likely to hit the water retaining chain in front of the machine, the water intercepting beam at the rear of the machine, and the entrance and exit guide device, etc.; The situation where the rolled piece hits the roller table flower stand. The main reason for the bending of the head of the rolled piece is the uneven extension of the upper and lower sides of the rolled piece. [0003] During the rolling process, the com...

AI Technical Summary

Problems solved by technology

[0004] Controlling by the traditional method requires stopping the production and adjusting the heating treatment on the top and bottom of the slab, which is a waste of time and is not conducive to continuous production

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