METHOD FOR REDUCING NECKING IN ROLLING PROCESS

摘要

The present invention relates to a method for reducing a necking phenomenon in a rolling process. The method comprises: a step of inputting width information of strips entered into a winder via a finishing mill into a control part; a step of making the control part calculate the necking amount based on the width information; and a step of making the control part correct one or more lead rates among pinch rolls and mandrels of the winder by comparing the necking amount with a reference value. When the necking phenomenon occurs to the strips entered into the winder via the finishing mill, the present invention can reduce the necking phenomenon by correcting the lead rate of the pinch rolls and the mandrel, thereby increasing the width quality of produced coils. [Reference numerals] (AA) Start; (BB) End; (S100) Input width information of strips; (S110) Input width information on an outlet of a finishing mill; (S120) Input width information on an inlet of a winder; (S130) Does the strips enter into a mandrel?; (S140) Extract the width information corresponding to a necking section; (S150) Calculate the necking amount; (S160) Necking amount > reference value?; (S170) Correct the lead rate reduction of pinch rolls; (S180) Correct the lead rate reduction of mandrels; (S190) Store the corrected lead rates