Control method for improving rolling pace of roughing mill

Abstract

The invention discloses a control method for improving rolling pace of a roughing mill and relates to a control device or method which is specially applicable to a metal rolling mill or machined products of the metal rolling mill. Plate blank head and plate blank tail detection devices are arranged on all groups of roller beds; according to detected plate blank head and plate blank tail signals, plate blank collision prevention conditions are set, and the occupancy state of a rack and the number of the idle roller beds are determined; according to the occupancy state of the rack and the number of the idle roller beds, control modes of the groups of roller beds are set; according to the plate blank collision prevention conditions and the control modes of the groups of roller beds, transmission speeds of the groups of roller beds are controlled respectively, and starting and stopping of a second plate blank are controlled to minimize the distance between a first plate blank and the second plate blank, so that the transmission time interval between the two plate blanks is minimized. By the aid of the method, the distance between the two adjacent machined plate blanks can be greatly shortened, so that the front and back rack production is closely connected, and the rolling pace of the rolling mill and the device utilization rate can be greatly improved.

Description

Technical field [0001] The invention relates to a control device or method specially suitable for a metal rolling mill or its processed products, in particular to a control method for grouping control of roller speeds by detecting the position of the roller table where the head and tail of a slab are located, thereby improving the rolling rhythm of a rough rolling mill . Background technique [0002] The technological process of the hot rolling production line roughly includes heating, rough rolling, finishing rolling, coiling, transportation chain, finishing and other processes. First, according to the rolling plan, the slabs are sequentially loaded into the walking heating furnace Ht. After the slabs are heated to the target temperature specified by the process, the slabs are drawn out one by one by the drawing machine, placed on the roller table in front of the furnace, and then the hot slabs are transported to the rough rolling mill. In the rough rolling mill, the slab firs...

AI Technical Summary

Problems solved by technology

[0012] (3) When the strip swinging at the entrance of the first rack receives the command to stop swinging and enter steel, it takes 1-2 seconds to delay from stopping swinging to starting steel feeding, thus causing the second rack and the first It is impossible for one stand to start the rolling of steel at the same time, but it is delayed, which delays the rolling of the second stand

However, this method is to control the rolling rhythm by controlling the time of each rolling stage. Since the length of each slab in the actual production process is uncertain, this method is not suitable for the existing rough rolling production line, nor can it overcome the above-mentioned problems. There are technical disadvantages

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