Method of parallel rolling by two roughing mills in the rough roll zone on hot rolling production line

Abstract

The parallel rolling process with two roughing mills in the roughing area of the production line features that the computer program controlled 3 gate + 3 gate rolling mode with the first roughing mills R1 in forward direction rolling and the second roughing mills R1 in reverse direction rolling simultaneously. In the first or the third gates of the R1 and the R2, the R2 is preferential, while in the second gate of the R1 and the R2, the R1 is preferential. The present invention has effectively controlled time sequence, and compared with original rolling process, the present invention has reduced rolling time, saving in power consumption, and raised rolling quality.

Description

technical field [0001] The invention belongs to the technical field of steel rolling, in particular to a rough rolling method of a hot rolling production line. Background technique [0002] The rough rolling area of ​​the hot rolling production line usually consists of two rough rolling mills R1 and R2, and the distance between the rough rolling mills R1 and R2 is relatively short. The rough rolling mill R1 in the rough rolling area of ​​our company's 1780 hot rolling production line was added between the fixed-width press SP and the rough rolling mill R2 in order to increase production during the equipment transformation period, so the two-roll rough rolling mill R1 and the four-high rough rolling mill R2 The distance between the fixed-width press SP and the two-roll roughing mill R1 is less than 30 meters. Therefore, if two rough rolling mills R1 and R2 are rolled simultaneously, it is easy to cause a collision accident of the slab between the two rough rolling mills. Ac...

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Problems solved by technology

This mutual waiting not only affects the output, but also increases the iron scale, wastes a lot of raw materials, increases the cost, and also loses heat, which increases the gas cons...

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