METHOD AND DEVICE FOR FORMING AND CONTROLLING EDGE OF METAL PLATE

PURPOSE:To obtain high quality rolled stocks having rectangular shape edge surfaces without meanders by detecting a pressing force in the plate width direction of a right and a left edger roll forming edges positioned right under a screw-down device of a rolling mil and controlling a right and a left rolling screwdown force to make a right and a left pressing force equal. CONSTITUTION:Both edges of a rolled stock 3 bitten and extended to the full roll width by shift of work rolls 1 and 2 are pressed by edger rolls in the rolling direction positioned right under the work rolls 1 and 2 and edge surfaces 23 are formed into a rectangular shape. A right and a left pressing force P1 and P2 are detected by a pressing force adjusting device 9 through a pressing force detector 25. A difference DELTAP between the pressing forces P1 and P2 is obtained by a proportional arithmetic element 26 and a screwdown adjusting device controls a right and a left screwdown device so as to make the DELTAP zero. In this method, meanders of the stock 3 are eliminated and the stock 3 has a good rectangular edge surfaces 23 with the highly accurate plate width.