In a significant advancement for the steel manufacturing sector, researchers have tackled the persistent issue of slab camber during the rough rolling process in hot strip mills. Slab camber, the deviation in the flatness of steel slabs, can lead to production inefficiencies and increased costs. The study, led by WANG Hai-yu from the Automation Research Institute at Beijing Shougang Automation Information Technology Co. Ltd., has unveiled a new tilting control model that promises to enhance the quality of rolled steel products.
The research identifies several critical factors contributing to slab camber, including the differences in longitudinal stiffness of the mill on either side, incoming wedge, and the running deviation of rolled pieces. By applying spring equations and analytical methods, the team quantified these influences and developed a model that calculates the necessary adjustments to the roll gap during each pass of the rolling process. WANG noted, “Our model provides a clear quantitative relationship between the main factors affecting camber and allows for precise control adjustments, which is crucial for maintaining product quality.”
The results of this innovative approach have been compelling. After implementing the model in a 2250 mm hot strip mill, the rate of camber values that fell outside of tolerance dropped dramatically from 24.88% to just 6.62%. This improvement not only enhances the quality of the steel but also significantly reduces waste and rework, which can be a major cost driver in production. “By improving the control effect of camber, we have alleviated a long-standing problem that impacts both efficiency and profitability,” WANG added.
The implications of this research extend beyond immediate production benefits. With a more reliable rolling process, manufacturers can expect enhanced operational efficiency and reduced material costs, which ultimately translates to better pricing and competitiveness in the market. The steel industry, a cornerstone of construction and infrastructure development, stands to gain significantly from these advancements.
As the construction sector continues to evolve, innovations like the slab camber control model will likely shape future manufacturing processes. Enhanced control over product quality not only supports existing projects but also opens doors for new applications and technologies in steel production.
This groundbreaking research was published in ‘工程科学学报’, or the Journal of Engineering Science, underscoring the importance of scientific inquiry in driving industry advancements. For more information about WANG Hai-yu’s work, visit Automation Research Institute, Beijing Shougang Automation Information Technology Co. Ltd..
