Method for processing stable and reliable roll gap measuring signals of aluminum alloy cold rolling

Abstract

The invention provides a method for processing stable and reliable roll gap measuring signals of aluminum alloy cold rolling. The method comprises the steps that in the aluminum alloy cold rolling process, alarm signals sent by a roll gap signal sensor through a transmitter are converted into switching value signals S connected into an automatic control system by a relay; and the automatic controlsystem judges the switching value signals S so as to filter false alarms, and evaluates whether the roll gap signal sensor is blocked or whether the signal deviation of the roll gap signal sensor istoo large. According to the method, the aluminum alloy cold rolling operation can be more stable and reliable.

Description

Technical field [0001] The invention relates to the technical field of non-ferrous metals, in particular to a method for processing a stable and reliable roll gap measurement signal for cold rolling of aluminum alloy. Background technique [0002] In aluminum alloy cold rolling equipment, the mill hydraulic roll gap control (HGC) system is an important part of mill thickness control and an important technical means to improve strip thickness accuracy. HGC generally uses the sony magnetic ruler SR-721 to measure the roll gap signal, and cooperates with the MD20B transmitter to send the displacement signal to the automation control system through the counter module. The RES button on the front panel of MD20B can manually reset the magnetic tape alarm. When the magnetic scale signal is stable, this method can meet the requirements of cold rolling production. [0003] However, according to the above-mentioned sony magnetic ruler to measure the roll gap signal processing method, it ca...

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Problems solved by technology

[0003] However, according to the above-mentioned processing method of the sony magnetic ruler measuring the roll gap signal, it can theoretically meet the requirements of HGC, but it ignores that the magnetic ruler is limited by the site and process layout. In the cold rolling mill body with large oil and gas, the distance between the magnetic scale and the automatic control system is often long, and the sensor signal attenuation is serious. With the increase of the transmission distance, the anti-interference ability of the signal is also greatly weakened, so the magnetic scale signal often cannot Absolutely stable, once an instant or permanent alarm occurs, the control system does not automatically detect it in time, there is no automatic safety interlock, the magnetic ruler signal no longer changes with the action of the AGC cylinder, and no longer truly reflects the actual roll gap size, resulting in Equipment accidents such as roll tilting and roll gnawing, production interruption, and roll regrinding will reduce the integrity rate of equipment, resulting in poor shape of the aluminum plate in production, quality accidents with large thickness differences, and reduced yield

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