Tension control method for continuous processing line with large specification range and capacity

Abstract

The invention relates to the field of strip steel production, in particular to a tension control method for a continuous processing line with large specification range and capacity. The tension control method for the continuous processing line with large specification range and capacity adopts the tension-tension-bounce roller-tension control method, direct tension control is adopted at an inlet of a heat treatment furnace, an outlet of the heat treatment furnace as well as an inlet and an outlet of a pickling section, and the bounce roller is arranged between a second tension roller set at the outlet of the heat treatment furnace and a third tension roller set at a pickling inlet. The tension control method has the following benefits: the control effect is very ideal; the speed control accuracy is smaller than or equal to plus / minus 0.1% of the maximum speed in a steady state, and the speed control accuracy is smaller than or equal to plus / minus 0.4% of the maximum speed in a dynamic state; the tension control accuracy in a steady state is smaller than or equal to plus / minus 1.5% of a tension set value of a 8.0 mm strip when the strip thickness ranges from 6.0 mm to 8.0 mm, is smaller than or equal to plus / minus 1.5% of a tension set value of a 6.0 mm strip when the strip thickness ranges from 2.2 mm to 6.0 mm, and is smaller than or equal to plus / minus 1.5% of a tension set value of a 2.2 mm strip when the strip thickness ranges from 0.4 mm to 2.2 mm.

Description

technical field [0001] The invention relates to the field of strip steel production, in particular to a method for controlling the tension of a continuous processing line with a large specification range and production capacity. Background technique [0002] Usually the strip continuous production line is designed with a thickness range of 0.3-3.0 mm, a width range of 800-1320 mm, and a production capacity of 300,000 to 500,000 tons per year. The basic configuration is uncoiler, welding machine, looper, furnace, pickling, looper, shearing machine, and coiling machine. The method of electric transmission and automatic control configuration is: the transmission configures a single motor according to the tension required by the maximum specification , The automation system of the process section adopts the tension-speed-tension control mode, and the tension control accuracy is generally static: ±2%, dynamic ±4%. [0003] The tension control method of the traditional process se...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: how to solve the problem that when processing small-sized products, the transmission and automation systems both work in the discontinuous area, resulting in unstable working conditions, large fluctuations in strip tension and speed, and unsatisfactory process control. The problem of precision requirements

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