Packaging steel strip produced waves of reason and solution

Packaging steel strip causes of wave and solution ( 1) Defect characteristics: shape wave bending along the rolling direction is ups and downs. Waves can appear in the middle of the strip, side, two sides or two ribs. ( 2) Reasons (1) roll curve with large and small, roll the partial high temperature and emulsion flow is small, the roll is convex type, produce waves in the middle. (2) roll curve with small and large, or low temperature make the roll is concave type, waves have two sides. (3) roll improper level adjustment, pressure big, big side of edge wave under pressure. (4) emulsion nozzle clogging are prone to two ribs. 5. Poor control of roll shape, the varieties, specifications of rolling schedule is unreasonable, breast roll excessive wear. 6. Raw materials or bad profile surface defects such as large area convex hull. ( 3) To prevent and eliminate method (1) reduction for different right allocation. (2) the correct configuration roll shape curve, the rational use of emulsion flow dong, good control of roll shape. (3) order of steel rolling, as planned in accordance with the provisions, change of roll. (4) the correct roll level adjustment and zero adjustment. (5) grinding roll curve as required. 6. Improve the raw material plate shape and plate is poor, the material condition is bad, should increase the early as far as possible under time pressure. ( 4) Check to determine (1) check with the naked eye, the plate on the platform test string. (2) the judgment standard with ladle curvature. Make the following provisions: another common plate length is more than the wave superposition method to calculate available, but no more than 30 mm total height. (3) edge wave form can change feet form of delivery.