A control method for the welding seam of silicon steel strip passing through the tension leveler

Abstract

The invention discloses a control method for allowing silicon steel strip welding seams to pass through a withdrawal and straightening machine, and belongs to the technical field of withdrawal and straightening control methods of acid rolling units. The control method comprises the following steps that the range of the steepness and the iron loss value of the positions, near the welding seams, offront and rear silicon steel strips and control modes of the corresponding withdrawal and straightening machine are set, wherein the control modes comprise the roller set quick opening mode, the speed-reducing withdrawal and straightening mode and the constant-speed withdrawal and straightening mode; when the steepness of the welding seams of the front and rear silicon steel strips meets the set range, the roller set quick opening mode is adopted; and when the steepness of the welding seams of the front and rear silicon steel strips does not meet the set range, the speed-reducing withdrawal and straightening mode or the constant-speed withdrawal and straightening mode is selected according to the range of the iron loss value of the silicon steel strips. The control method has the beneficial effects that the corresponding control mode is selected according to the shape and performance of the silicon steel strips, so that the energy-saving effect is achieved, the shape of the silicon steel strips is effectively improved, the pickling quality is improved, the rolling cycle is shortened, the occurrence rate of the strip breaking accidents is reduced, and the withdrawal and straightening quality of the silicon steel strips is improved.

Description

technical field [0001] The invention relates to the technical field of a tension leveling control method for an acid rolling mill, in particular to a control method for a silicon steel strip weld seam passing through a tension leveler. Background technique [0002] The pickling rolling unit is a combined pickling and cold rolling unit. Pickling is the first treatment process of cold rolling. Its main function is to remove the iron oxide layer adhering to the steel surface, prepare for subsequent processing, and prevent New defects appear during washing. The tension-leveler is located before the pickling section, and is used for tension-leveling the hot-rolled strip steel, breaking the scale of the strip steel, and ensuring that the strip steel can be fully pickled, which plays a decisive role in the pickling effect. [0003] In the pickling process of hot-rolled strip steel, it is necessary to weld the front and rear coils together and pass through the pickling area; at the...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned technical problems, the present invention provides a control method for the weld seam of the silicon steel strip to pass through the tension leveler, which mainly solves the problem of adopting the non-stretch and straighten mode of the weld seam due to the low elongation of the silicon steel strip and the unstable structure of the weld seam. Affects the pickling quality and rolling rhythm of the silicon steel strip, and the problem of strip breakage at the weld will occur when a specific weld tensioning mode is adopted. The purpose is to design a control method that can Different control modes are selected according to the shape and properties of the silicon steel strip, so that the shape of the silicon steel strip head and tail can be effectively improved, which can improve the pickling quality, improve the rolling rhythm, reduce the incidence of broken strip accidents, and improve the silicon steel strip. Tensile quality

Images