Development of pinch rolls to control strip wandering in strip processing lines

In strip processing lines, it is important to restrain strip wandering whic h obstructs operational reliability and makes productivity decline. To impr ove the stability of the strip conveyance at the existing facilities in add ition to the new facilities, a compact guiding apparatus was able to be int roduced easily and was valid. In this report, the structure of the unique b ent roll covered with a rubber sleeve, which has a wandering restraint func tion, was examined and the effect was clarified using an experimental appar atus. A rubber sleeve that needs durability to endure expansion and contrac tion by rotation of the bent roll was also examined. Production machine siz e rolls were newly developed and evaluated as pinch rolls in processing lin es. Under the general condition to set pinch forces identically on both sid es of the roll, this roll always has the ability to restrain strip wanderin g. When putting deviation of pinch forces on both sides, the ability of the wandering correction was increased. It was proposed that the wandering cor rection system, which controls the pinch force using the output of width se nsor, was useful in the processing line. It was also possible to use these pinch rolls as the wandering correction apparatus at the place where it is difficult to use a general guiding apparatus because there is no restrictio n of line tension.