Multiple-stand strip rolling control - uses model comparisons and converging parameters to maintain strip profile and flatness

摘要

In the control system for a multiple-stand and/or cold rolling strip mill, the process control has a pass plan with the start and end dimensions, material data and roller temps. and setting systems to maintain nominal values. Separate controls are provided for variable function values at the separate stands and a computer compares models under converging parameter matching at the actual parameters to bring the individual controls into nominal values. A closed circuit gives profile and flatness control by altering the load distribution at the separate stands, by acting on the roller back bending, the camber and, if required, the roller sliding and/or setting. ADVANTAGE - By acting on all the working points of the strands the strip quality is accurately controlled.