Simultaneous proceeding method of online countercurrent roller changing and dynamic procedure changing for ESP finishing mill group

Abstract

The invention provides a simultaneous proceeding method of online countercurrent roller changing and dynamic procedure changing for an ESP finishing mill group. Racks over roller changing racks are adjusted according to input rolling technology and rolling mill parameters, the roller changing racks are raised and adjusted when thickened points reach the roller changing racks, racks below the roller changing racks are adjusted when a roller changing rack Fi is withdrawn from rolling, a standby rack roller is pressed down and adjusted when the thickened points reach a standby rack, and the racksbelow the standby rack are adjusted when a roller changing rack Fj is withdrawn from the rolling, the simultaneous proceeding of non-stop online roller changing and rolling procedure changing is realized. According to the simultaneous proceeding method, rotational speed and roller gap of each stage of roller changing are adjusted, product procedure is changed, the entering process of the standbyrack is achieved online under the premise that stable rolling of a rolling mill is ensured, non-stop online roller changing and rolling procedure changing are achieved, and continuity of an ESP production line is ensured.

Description

technical field [0001] The invention relates to the field of metallurgical continuous casting and rolling, in particular to a method for performing countercurrent on-line roll changing and dynamic program change in an ESP finishing rolling mill at the same time. Background technique [0002] Endless Strip Production (ESP) is a cutting-edge technology in the field of short-process hot-rolled strip at home and abroad. It can make full use of the heat energy of molten steel and produce products that can replace cold-rolled strips on an efficient and compact production line. The high-quality thin-gauge hot-rolled steel strip of the product can save energy by 40% compared with the traditional hot-rolled production line, which can greatly reduce production costs, save energy and reduce emissions, thereby reducing energy consumption and environmental pollution. [0003] However, since the products of the ESP production line are mainly thin-gauge plate and strip products, the roll w...

AI Technical Summary

Problems solved by technology

However, every time the ESP finishing mill changes the schedule, a thickening zone of 5 meters or even longer will be generated, resulting in steel loss and waste of resources

Although the online roll changing process can completely eliminate the existence of the variable thickness zone of the finished strip through a reasonable roll changing strategy, it is only possible in theory. Produces variable thickness zones in the finished strip

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