The Design And Research Of Scaly Rupturing Roll Control System In Acid-washing Set Of Cold-rolling Mill Based On Material Flow Information

The paper is based on the modifies and designs for the scaly rupturing roll control system at acid-washing set in cold-rolling mill of Baosteel.The paper analyzes the shortage of control method of former system and the force-bearing status of scaly rupturing roll and advances a new control method. New system adopts the method of position linking with pressure control, thereby keeping metal strip distort steadily and avoids it run out. On the base of above, the electrical and software system is designed and the problem of transmitting the information from processing computer of acid-washing product process into the industry control computer is solved.The design includes: The developement of the PLC control program at automation layer, consequently the reliable control of scaly rupturing roll is realized. Moreover, the monitoring system at process layer is set up and the monitoring software is used to design HMI and the visualizing accurate control system is realized. The communication program is realized in Visual Basic. The exchanging of information from process computer to industry control computer is realized by DDE (Dynamic Data Exchange).The main contribution of the paper lies in two aspects as follow: (1) control model with position and pressure control of scaly rupturing roll is builded, (2) The problem of acquiring the material flow information from processing computer is solved, by using multi-subjects knowledge comprehensively, such as hydraulic theory, modern control theory, computer and network techniques ans so on. The research work is with important theoretic significance and practical value.