SYSTEM FOR CONTROLLING STRIP PROFILE Russian patent published in 1998 - IPC

FIELD: rolled stock production, namely, sheet rolling mills. SUBSTANCE: system includes main hydraulic circuit for counterbending rolling rolls of rolling mill stand with counterbending hydraulic cylinders whose working cavities are hydraulically connected with pressure regulators. Each pressure regulator is provided with pressure feedback pickup. System also includes unit for generating control signals; pumping unit whose output is connected with circuit for counterbending rolling rolls; additional hydraulic circuit for counterbending rolling rolls arranged in main hydraulic line between pumping unit and main hydraulic circuit. Additional hydraulic circuit is in the form of two standby pressure regulators mutually joined in parallel by means of pipelines. Each standby pressure regulator is connected with hydraulic distributor. Main hydraulic circuit is provided with hydraulic distributors. Pressure regulators are hydraulically connected through respective distributors with working cavities of hydraulic cylinders for counterbending rolls and with additional hydraulic circuit for counterbending rolls. EFFECT: three-level redundancy of pressure regulator, enhanced reliability of system, high accuracy of controlling strip profile. 8 cl, 1 dwg