| 摘要 |
PURPOSE:To control the profile and shape of a plate material with high accuracy by rolling said material while moving upper and lower work rolls in the directions opposite from each other. CONSTITUTION:The taper start points 22A-22C of the work rolls 19A-19C of 3 stands on the upper stream in a tandem rolling mill are set on the side inner than the side ends of the plate and the taper start point 22D of the work roll 19D of the final stand or the side ends of the rolls are set on the outside near the side ends of the plate. Rolling is usually executed successively from the wider plates toward the narrower plates and therefore the work roll shift is so executed that the tapered parts of the work rolls are shifted toward the central side of the plate width. The work roll shift of the 2nd stand is started after the end of the work roll shift of the 1st stand. The work roll shift of the 3rd and 4th is executed in the same manner. |
