Rolling mill halt controlling method and controlling system thereof

Abstract

The invention discloses a rolling mill halt controlling system. The system comprises a rolling mill controlling unit, a main control unit, a plate thickness controlling module and an industrial control computer; thickness meters are arranged at outlets and inlets of working rollers; the system further comprises an encoder which is used for detecting the length of a rolling plate; the plate thickness controlling module is respectively connected with the encoder and the thickness meters; the plate thickness controlling module and the industrial control computer are connected with each other andinteract in data; the plate thickness controlling module issues a deceleration command when the length between the working rollers and a rolling line reaches the residual length; the plate thickness controlling module issues a constant speed or delayed halt command to a rolling mill when the designed data of thickness of a target rolled plate is compared with real-time data acquired from the thickness meters; and the main control unit is respectively connected with the plate thickness controlling module and the rolling mill controlling unit and the main control unit receives the commands fromthe plate thickness controlling module. The rolling mill halt controlling method and the controlling system thereof which are high in safety coefficient and do not cause waste of materials are provided.

Description

technical field [0001] The invention relates to the technical field of steel strip production equipment, in particular to a control method and a control system for shutting down of a rolling mill. Background technique [0002] When the existing reversible rolling mill is used for cold rolling to produce steel strips, all the main performance indicators can meet the production needs after being put into production, but there are some deficiencies in the control of the tail part of the rolled plate, and there is room for improvement. The reversing rolling mill performs multiple cold rolling on the steel strip to meet the usage requirements. According to the prior art, a control system for the thickness of rolled plates is disclosed on the website of the State Intellectual Property Office. The announcement number is CN106180207B. The steel plate is sent into the rolling mill for rolling, and the thickness of the steel plate before and after rolling is monitored in real time by ...

AI Technical Summary

Problems solved by technology

Only use the thickness gauge to test the thickness of the steel plate before rolling to realize the deceleration or shutdown of the rolling mill unit, and it is impossible to achieve accurate shutdown. If the rolling line is rolled over, it will cause an accident and the safety factor is low; if the calculated length is shorter than the actual length, it will cause Rolling mill stopped early, wasting material

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