Plate strip hot mill rolling sequencing control method

Abstract

The invention discloses a sequential control method of sheet strip of hot-rolling mill, which comprises the steps: 1. precomputing: after the tail of former sheet strip is broken away from the first frame, the breaking-away signal is taken as control signal to start-up a second rolling model computer to rolling precompute to the next block slab, and send data to the next level control computer; 2. loading executing: the first level control computer receives rolling precomputing data of the next block slab, and store the data in buffer; the first level control computer acquires in sequence breaking-away signal of the former sheet strip of each rolling mill frame and sends the next slab precomputing data in buffer of corresponding frame to corresponding frame for execution in turn. The invention has the advantages of greatly shortening interval time of rolling between slabs, being capable of realizing fast tapping of sheet strip hot-rolling mill, remarkably improving working efficiency of sheet strip hot-rolling mill, enhancing about 20 percent of productivity with good economic benefit.

Description

technical field [0001] The invention belongs to the technical field of metallurgical metal pressure processing, and in particular relates to a rolling sequence control method of a strip hot rolling mill. Background technique [0002] There are multiple stands in the rolling area of ​​the strip hot rolling mill, see Figure 1, taking a rolling mill with six stands as an example, its rolling mill control system includes a secondary rolling model computer 1 and a primary control computer 2, where The secondary rolling model computer 1 is used to pre-calculate the rolling control parameters of each stand corresponding to the slab to be rolled, and send the pre-calculated data to the primary control computer 2. The primary control computer 2 uses After receiving the rolling data of each rack, download it to each rack and execute it separately. The conventional rolling sequence control method of the hot rolling mill is: after the tail of the current strip is thrown from the coilin...

AI Technical Summary

Problems solved by technology

The defect of this traditional design is that when the tail of the strip leaves the rolling mill and runs in the laminar cooling area, each stand is in an idle state to be rolled at the same time, which greatly reduces the operating rate of the rolling mill

Especially in the thin slab continuous casting and rolling production line, the three processes of continuous casting, heating furnace and rolling mill are closely connected. When the operating rate of the rolling mill decreases, it will directly lead to a decrease in the buffer time of the heating furnace, forcing the continuous casting to slow down and affecting the operation of the entire production line. Rhythm control, production capacity play

Generally, compared with the production of hot-rolled steel plates with normal thickness, the production of thin-gauge hot-rolled steel plates will reduce the production capacity of hot-rolled mills by 20-25% due to the long pure rolling time, which limits the widespread application of thin-gauge hot-rolled steel plate production technologies. a key question of

[0003] To sum up, regardless of whether the hot strip mill produces thick plates or thin plates, the conventionally designed rolling control sequence directly affects the production line's operating rate and production capacity, and even affects the economic benefits of the enterprise.

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