Method for increasing thickness detection precision of stainless steel cold-rolling mill

Abstract

Disclosed is a method for increasing thickness detection precision of a stainless steel cold-rolling mill. The method is characterized by including the steps that steel grade codes and raw material manufacturers are combined to give serial numbers to steel grades, as for different raw material manufacturers which each steel grade corresponds to, corresponding thickness standard plates are respectively manufactured, and the standard plates are used for calibrating a thickness gauge so as to determine alloy compensation coefficients of the steel grades. Thereby, the different raw material manufacturers can be effectively distinguished, and errors of the detection precision of the thickness gauge due to original same steel grade mark but different raw material manufacturers can be avoided. By means of the method for increasing the thickness detection precision of the stainless steel cold-rolling mill, a control system of an existing stainless steel cold-rolling mill is fully utilized, special transformation and added devices are not required, producing requirements can be met, the thickness detection precision can be greatly improved, and the method is simple, practical and reliable.

Description

technical field [0001] The invention relates to the field of thickness detection of stainless steel cold-rolled products, in particular to a method for improving the thickness detection accuracy of a stainless steel cold-rolling mill. Background technique [0002] Thickness accuracy is very important for stainless steel cold-rolled products, and to ensure the thickness control accuracy, the thickness detection accuracy of the thickness gauge must be ensured first. [0003] Measuring principle of the thickness gauge: The X-ray source of the thickness gauge produces a certain intensity of radiation. After being absorbed by the stainless steel, the sensor receives and detects the X-ray passing through the stainless steel, and then converts it into a voltage to calculate the thickness of the stainless steel to be measured. The more alloying elements in stainless steel and the higher the atomic weight of the alloying elements, the higher the absorption rate of X-rays of the thick...

AI Technical Summary

Problems solved by technology

[0008] Disadvantages: In actual operation, the mutual influence of multiple alloy elements on the thickness gauge is not considered, and the thickness deviation of on-site detection is large, some reaching tens of microns, which cannot meet the needs of users

[0011] Disadvantages: Only one raw material manufacturer can be used to make thickness standard samples. If the current rolled steel coil alloy elements of other raw material manufacturers are quite different from the standard sample, it will have a certain impact on the thickness detection accuracy.

This method only distinguishes different steel grades, and cannot effectively distinguish raw material manufacturers

After on-site testing, the same steel grade and different raw material manufacturers will cause an error of 0-30 μm in the detection accuracy of the thickness gauge, which needs to be urgently resolved