Troubleshooting method for high-speed wire rolling line

Abstract

The invention relates to a high-speed wire rolling fault processing method. When wire rolling fails, a PLC sends out a flying shear acting order to a flying shear system, and a flying shear is started; timing starts while the flying shear is started, when timing is conducted to reach the time T, the PLC sends out a clamping and breaking shear acting order to a clamping and breaking shear system, and a clamping and breaking shear is started; and after the flying shear shears off a rolled piece, the subsequent continuous rolled piece enters a chopping shear through a trip switch guide pipe to be subjected to chopping shearing. According to the high-speed wire rolling fault processing method, the wire rolling fault time is shortened, production is recovered as soon as possible, steel piling cannot be caused, and the service life of equipment cannot be affected.

Description

technical field [0001] The invention relates to the field of high-speed wire rod production, in particular to a fault handling method for a high-speed wire rod rolling line. Background technique [0002] With the continuous development of science and the continuous progress of society, at present, some large-scale steel mills in China are expanding production, making continuous progress, carrying out new construction, renovation, relocation, and continuous improvement of steel rolling technology. The accuracy of automation control is improved, the production capacity is continuously increased, the failure rate of equipment is greatly reduced, and the production efficiency is continuously improved. At present, the automatic control systems of the steel rolling systems of major domestic steel mills use PLC or DCS as the main control system, and cooperate with major systems such as electrical transmission and mechanical devices to complete the work from raw materials to finishe...

AI Technical Summary

Problems solved by technology

When a fault occurs in the rolling line, the PLC sends an action command to the No. 3 flying shear and the clamping shear at the same time. The clamping shear is driven by a solenoid valve, and the 3# flying shear is a motor rotation action. The action time of the clamping shear is relatively short. Short, 3# flying shears need a certain amount of time (generally tens of milliseconds) from action to completion. Since the red steel line speed is relatively high at this time (greater than 10m / s), it will cause fault cutting when starting the flying shears. Because the jamming shear first touches the high-temperature rolled piece, the high-speed rolled piece will bend and deform itself due to the large inertia, causing the rolled piece to deviate from the shearing position of the flying shear. When the flying shear reaches the shearing position, it cannot Shearing to the rolled piece or effectively shearing the rolled piece causes a large amount of steel piled up at the flying shear

The high-temperature scrap steel on the cutting edge not only increases the difficulty of handling, but also greatly lengthens the failure time, and if it is not handled in time, the high-temperature red steel will damage the 3# flying shear mechanical equipment and affect the life of the equipment

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