Strip steel tail rolling oil spray control system

Abstract

The invention relates to a strip steel tail rolling oil spray control system. The system comprises a rotation speed sensor, a roller diameter sensor, a roller gap sensor, a load relay state sensor, a loop height sensor, a rolling pressure sensor, a displayer, a rolling oil valve and a programmable logic controller (PLC). The system is characterized in that signal output ends of the rotation speed sensor, the roller diameter sensor, the roller gap sensor, the load relay state sensor, a loop height sensor and the rolling pressure sensor. The signal output end of the PLC is connected with the control end of the rolling oil valve, and the displayer is connected with the PLC. By means of the system, the rolling oil valve is controlled accurately according to real-time data of the finish rolling production process, the delay self-learning repair function is perfected, excessive remaining rolling oil is prevented from being retained on the roller surface, and the strip steel threading stability is greatly improved, and the system is reliable in operation and high in control accuracy.

Description

technical field [0001] The invention relates to a control system, in particular to a strip steel tail rolling oil injection control system. Background technique [0002] Lubricated rolling technology, which is the symbol of modern steel rolling, has been widely used in iron and steel enterprises. In production practice, the timing control of rolling oil opening and closing is very critical: if the timing of rolling oil spraying is stopped too early, the rolling pressure at the tail of the strip will increase sharply, which will affect the stability of steel throwing, and tail flicker and tail breakage will occur. , tripping and other phenomena, which affect the production capacity and the roll consumption index of the roll; if the rolling oil spraying time is too late, not only will there be unevenly distributed rolling oil on the roll surface, but also affect the relationship between the bite angle and the friction angle , is not conducive to biting, and may cause changes ...

AI Technical Summary

Problems solved by technology

In production practice, the timing control of rolling oil opening and closing is very critical: if the timing of rolling oil spraying is stopped too early, the rolling pressure at the tail of the strip will increase sharply, which will affect the stability of steel throwing, and tail flicker and tail breakage will occur. , tripping and other phenomena, which affect the production capacity and the roll consumption index of the roll; if the rolling oil spraying time is too late, not only will the uneven distribution of rolling oil remain on the roll surface, but also affect the relationship between the bite angle and the friction angle , which is not conducive to biting, and may lead to changes in the bounce of the rolling mill, affecting the head thickness of the strip, and causing waste of rolling oil and environmental pollution

It is usually controlled by switching on and off of the load relay plus a certain delay, but the control accuracy is low, and too much residual rolling oil is often retained on the surface of the roll, which affects the stability of the fast strip threading.

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