A study on roll gap profile (strip profile) control was accomplished in a 1700 mm single-stand
temper mill. Some critical
problems 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 roll
bending effect on strip thickness was also analyzed. It is pointed out that there are some special features of flatness control in the
temper mill: during temper rolling, roll deformation is slight due to small rolling load, and the loaded roll gap profile mainly depends
on work roll contour, while the backup roll has a little effect on gap crown; the effect of bending force on gauge can not be ignored
due to the coupling between flatness control and gauge control. A new
roll contour arrangement adaptable to the mill was presented
and has been put into practical production. The application of the new set of rolls showed some good results: larger crown control
range of work roll bender, higher rolling stability, better strip profile and flatness quality.