A Study on the Fault Diagnosis of 3-D Roll Shape in Rolling Systems

Abstract The metal processing system usually consists of various components such like motors, work rolls, backup rolls, idle rolls, sensors, etc. Even a simple fault in a single component in the system may cause a serious damage on the final product. It is therefore necessary to diagnose the faults of the components to detect and prevent system failure. Especially, the defects in a work roll are critical to the quality of strip. In this study, a new 3-D diagnosis method for roll shape defects in rolling processes was developed. The new method was induced from analyzing the rolling mechanism by using rolling force models, tension models, Hitchcock’s equations, and measurement of strip thickness, etc. Computer simulation shows that the proposed method is very useful in the diagnosis of 3D roll shape. Copyright © 2004 IFAC