APPLICATION OF INDUCTION HEATING TO CONTROL SHEET FLATNESS IN COLD ROLLING MILLS

摘要

A system for rolling metal strip (1) having a substantially uniform flatness including a rolling mill including a pair of work rollers (5) for reducing the thickness of a metal strip, an induction heating apparatus (10a) in close proximity to at least one roller (5), bending jacks corresponding to each of the rollers (5), and a cooling spray system (25) in proximity to the rollers (5); a flatness measuring device (15) positioned to measure a differential in flatness of the metal strip; and an mill control interface (30) connected between the flatness measuring device (15) and the rolling mill's actuators, in which the mill control interface (30) is configured to actuate the induction heating apparatus (10a), the bending jacks and the cooling spray system (25) to substantially eliminate flatness differentials is the metal strip's flatness. The induction coil heating apparatus (10a) is configured to eliminate high tension on the strip edges caused by the temperature gradients in the work rolls (5) at the edges of the metal strip.