Method for uniformly controlling quality parameters of cold-rolled strip steel

Abstract

The invention relates to a method for uniformly controlling quality parameters of cold-rolled strip steel. The method comprises the following steps of realizing mutual transformation of time and space of continuous value parameters; aligning the head, the tail and the length of a steel coil; reversely pushing the pre-rolling parameter positions according to the process sequence, and sequentially finding parameter values of the final process parameter positions corresponding to all the processes; collecting whole-process quality points, and changing single values and continuous values into parameters stored according to space; and carrying out primary correlation analysis and unary linear analysis on each self-varying item and each dependent item to obtain the correlation between the parameters. The method is suitable for a data analysis and screening scheme of a steel process, the single values and the continuous values can be compounded together for analysis, the analysis precision is improved, and the method has the capability of analyzing mutual influence among cross-process parameters; labor force for manually and frequently processing data is liberated, and finally product process stability control and enterprise economic benefits are effectively improved.

Description

Technical field [0001] This patent application belongs to the technical field of cold rolling car board, and more specifically, it is related to a method of uniformly controlling the quality parameters of the cold rolled strip. Background technique [0002] The steel metallurgical process has experienced a full process process from smelting, hot rolling and cold rolling. Material properties from liquid transition into solid state. Material heat treatment control from hot rolling to cold rolling. Process processes cause input, and output is not strong. Mainly reflected in the following aspects: [0003] 1. It is difficult to correspond to the spatial position of key quality points and control parameters. The actual secondary control record parameter value is based on time variation law. [0004] In order to achieve the process of the steel process, the current process parameters are recorded in the form of time. Process parameters are functions of time. For example, hot rolling wi...

AI Technical Summary

Problems solved by technology

However, in the process of quality analysis and quality control, it is difficult to complete the quality judgment of the entire coil of strip steel by using the corresponding relationship between process parameters and time. Because of the change of production speed, the length of the strip steel does not correspond to the time in equal proportions. relation

The relationship between traditional technology and time makes it difficult to control the quality of physical strip steel

[0012] 2. Single value and continuous value cannot be analyzed together

Example: Liquid material parameters do not match solid material parameters

[0013] 3. The parameters of solid materials have the problem of head-to-tail reversal and length changes after different processes, and it is impossible to achieve a direct correspondence between the material parameters of multiple processes in terms of length

However, due to the large variety of products and the deviation of process control, the performance may not be able to obtain a more ideal state

Images