METHOD FOR ROLLING IRREGULAR SHAPED STRIP

PURPOSE:To allow efficient rolling by providing plural die grooves on the outer periphery in the barrel part of work rolls and longitudinally moving the work rolls properly according to a reduction pass schedule and rolling the irregular shaped strip having different thicknesses in the transverse direction by the prescribed die grooves. CONSTITUTION:A previously roughly molded stock 5 for the deformed strip is passed in the 1st die groove of the upper work roll 1 and is rolled at a prescribed draft. The upper work roll 1 is moved in one direction along the axial center of rotation thereof and the 2nd die groove 16 is placed in the position of the 1st die groove before the movement. The irregular shaped strip after the 1st pass is passed in this 2nd die groove and is rolled at the prescribed draft. The upper work roll 1 is then moved along the axial center of rotation and the movement thereof is stopped in the state in which the 3rd die groove 1c exists in the position of the 2nd die groove before the movement. The irregular shaped strip after the 2nd pass is passed in this 3rd die groove and is rolled to form the irregular shaped strip product. Since the rolling is executed at the specified draft in this way, the rolling speed is increased and the efficient rolling of the irregular shaped shape is executed.