Regulation system in the manufacture of hot rolled strips by means of a multi-stand hot rolling mill

US5502992A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Gunter Sorgel · Nürnberg, DE
• Friedemann Schmid · Erlangen, DE

Key dates

• Filing date: Dec 28, 1993
• Grant date: Apr 2, 1996
• Expiry date: Dec 28, 2013

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B21B37/16
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

The invention relates to control in the manufacture of hot strip by means of a multi-stand hot-strip rolling mill, especially a wide-strip rolling mill, which has a higher-order process control system with a sampling plan with the initial and final dimensions, with material data, rolling temperatures, etc., and a guidance system for setpoint control of lower-order decoupled individual regulators for the variable functional parameters of the individual roll stands, e.g. roll adjustment, rotational speed, torque, etc., with the setpoints of the individual regulators being determined by means of a computation process using model equations with convergent parameter adjustment to the actual parameters, in such fashion that a working point control that can be determined in advance is provided and section control and regulation are accomplished by changing the load distribution on the individual stands in such fashion that the working points lie in the previously determined tolerance range of a shape control line.