Method capable of reducing strip steel edge shearing amount

Abstract

The invention relates to a method capable of reducing strip steel edge shearing amount. The method is suitable for the cold rolled silicon steel production and comprises the steps that rolling mill offline steel coil edge crack defect conditions are classified; secondly, a single-side shearing method is adopted in the edge crack defects of the A class to achieve edge shearing; thirdly, a non-equal-side shearing method is adopted in the edge crack defects of the B class and the C class; fourthly, in the cold rolling mill strip penetrating process, the positions of a deviation correcting rollerand the strip steel are adjusted to coincide with the central position of a production line; fifthly, when a cold rolling mill begins to start, the strip steel runs at the low speed, measuring is carried out multiple times, when it is found that the edge shearing amount is not even, a device is manually deviated in time to achieve adjustment, and in addition, tension of the rolling in the specialcondition is controlled. According to an automatic control system of an edge shear unit, the method that the dual-side edge shearing manner is adopted to achieve set value inputting, according to actual needs, and manual adjustment is achieved is adopted, the strip steel minimum shear amount is achieved, the product yield is improved, and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of cold-rolled steel strips, in particular to a method for reducing the trimming amount of steel strips in the production of cold-rolled silicon steel. Background technique [0002] In iron and steel products, cold-rolled silicon steel is used to make iron cores of various motors and transformers. It is an indispensable and important soft magnetic alloy in electric power, electronics and military industry, and is also an important metal functional material for energy saving. Such products are Due to the complex production process and many control difficulties of the high-tech products that are urgently needed in the country, their production can be used as a manifestation of the comprehensive strength of a country's steel industry. [0003] As the yield strength and tensile strength of cold-rolled silicon steel increase significantly with the increase of silicon content, the elongation decreases significantl...

AI Technical Summary

Problems solved by technology

[0004] At present, domestic cold-rolled silicon steel manufacturers generally use edge trimming to remove edge cracks after rolling. The edge trimming unit is controlled by an automatic control system. The final strip center deviates from the center of the production line, which has a great impact on subsequent operations; if both sides are trimmed with the same amount of trimming, it will have a greater impact on the yield and high production costs