| 摘要 |
PROBLEM TO BE SOLVED: To produce a wide flange shape with high dimensional precision by attaching a reaction force detector on a bias core angle regulation driving system of upper and lower restricting rolls, and detecting the generating amount of a web center bias based on the relation of a pre-set reaction force and the web center bias amount. SOLUTION: A bias core sleeve 14 is fitted in a space of web restricting rolls 15, a sectorial tooth shape 14-1 is graven on the outer circumference of this setting part, a driving gear 16 is turned so as to be engaged to this tooth shape, a reaction force detector 20 as the bias core angle regulation driving system 17 is attached on the rotary shaft of this driving gear 16, and the rotation driving device of a swinging motor 19, etc., is installed. The reaction force during rolling of the web restricting roll 15 is detected with the reaction force detector 20 directly from the bias core sleeve 14 or through a hydraulic pressure meter of a hydraulic motor. This detected value is calculated and treated based on the relation with the web center bias amount which is pre-obtained and set corresponding to the kind of wide flange shape in the pre-operation time, and the web center bias generating amount is detected. |
