Improvement on strip flatness of cold temper mills by modifying roll contour shape

<正> A study on roll gap profile (strip profile) control was accomplished in a 1700 mm single-stand temper mill. Some criticalproblems such as the deviation of work roll contour caused by grinding and wear, the effectiveness of work roll bending were dis-cussed. Using a finite element model, the effects of roll contours (ground and wear) on strip profile were investigated. The rollbending effect on strip thickness was also analyzed. It is pointed out that there are some special features of flatness control in thetemper mill: during temper rolling, roll deformation is slight due to small rolling load, and the loaded roll gap profile mainly dependson work roll contour, while the backup roll has a little effect on gap crown; the effect of bending force on gauge can not be ignoreddue to the coupling between flatness control and gauge control. A new roll contour arrangement adaptable to the mill was presentedand has been put into practical production. The application of the new set of rolls showed some good resul