UNIVERSAL ROLLING METHOD AND DEVICE THEREFOR

PROBLEM TO BE SOLVED: To roll shapes having high quality without difference in flange thickness and web deviation by making the diameter of a vertical rolls on one side larger than that on the other side and rolling a rolled stock as pushing the horizontal rolls in the direction of the vertical roll whose roll diameter is smaller. SOLUTION: A pair of upper and lower horizontal rolls 13, 14 and a pair of right and left vertical rolls are arranged around a rolled stock 12 for manufacturing a wide flange shape and the rolled stock 12 is rolled with these rolls 13-16. The roll diameter D1 of the vertical roll 15 is set larger than the diameter D2 of the other vertical roll 16, rolling reaction force P1 of the vertical roll 15 having larger roll diameter is made larger than the rolling reaction force P2 of the vertical roll 16. Rolling is executed as always pushing the horizontal rolls 13, 14 against the vertical roll 16 whose roll diameter is smaller. Then, the difference caused by operation variation in the roll clearances between the vertical rolls 15, 16 and the side faces of the horizontal rolls 13, 14 are not generated and the wide flange shape without the difference in the flange thickness and web deviation is rolled.