| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method for a taper steel plate with a small positional deviation at a starting point of roll gap change.SOLUTION: A rolling method for a taper steel plate by a plural-path reverse rolling, which has a thick part of uniform plate thickness in the longitudinal direction of a steel plate, a thin part of uniform plate thickness and a thinner plate thickness, and a taper part with the plate thickness continuously reduced from the thick part to the thin part, is characterized by calculating a positional deviation length (&Dgr;L) in the longitudinal direction of a steel plate at a change starting point of a roll gap from a rise of rolling load due to a positional deviation at a change starting point of a roll gap in the longitudinal direction of rolling, or from the past record of rolling load omission in the rolling at a taper part in a front path, and by correcting a rolling estimated length at the thick part or the thin part in a next path by the positional deviation length (&Dgr;L). |
