Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
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Fault Diagnosis of Roll Shape Under the Speed Variation in Hot Rolling Mill

  • Lee, Chang-Woo (Department of Mechanical Engineering, Konkuk University) ;
  • Kang, Hyun-Kyoo (Department of Mechanical Engineering, Konkuk University) ;
  • Shin, Kee-Hyun (Department of Mechanical and Aerospace Engineering, Konkuk University)
  • Published : 2006.09.01
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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. It is especially difficult to detect faults of a roll by using the existing frequency analysis method if the speed of the roll is changing. In this study, a new diagnosis method for roll eccentricity under the roll speed changes was developed. The new method was induced from analyzing the rolling mechanism by using rolling force models, radius-speed relationship, and measured rolling force, etc. Simulation results by using the field data show that the proposed method is very useful.

Keywords

References

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