SHAPE CONTROLLING METHOD OF ROLLING STOCK

PURPOSE:To perform the easily adjustable shape control of a rolling stock by controlling the primary shape component of a detected sheet shape by a draft leveling device and controlling the components of higher order except the primary one by sharing them among the operating terminals except said device. CONSTITUTION:A rolled steel sheet 2 is wound up by a tension reel 4 through a deflector roll 3. A shape detector 5 detects the shape of sheet 2, to detect its shape parameter by a recognition unit 10. An operation correcting-quantity detecting unit 12 obtains an operation correcting-quantity based on the deviation between the shape parameter of an aimed shape generator 11 and the actual one obtained from the unit 10, to transmit it to the operating terminals of a rolling reduction unit 13, etc. At that time, a primary shape component is approximated by a linear function and is controlled by the unit 13, and the components of higher order are controlled by sharing them among other operating terminals. Because both controls are performed without mutual interference, the shape control can be performed with simple and easy adjustment.