Thermal Actuators
Thermal actuators are needed especially to address the problem of non-symmetrical flatness errors. Stressometer systems can control, and be integrated with all existing spot cooling systems, whether simple on/off systems, advanced multi-step or pulse length controlled. ABB can also design and deliver new spot cooling spray bars when upgrading older mills with Stressometer Flatness Control Systems.
Overview
To achieve optimum flatness in 4 and 6 High mills, mill builders have developed increasingly advanced selective cooling systems adding thermal actuators.
In a 4 or 6 High mill a correctly designed and controlled spot cooling system permits higher rolling speeds and higher production as well as several I-units improvement in overall flatness. Keeping the roll in perfect thermal balance with the ABB spot cooling system will provide significant improvements in production.