Control method for utilizing roller diameter difference to achieve automatic pressing zeroing of aluminum cold rolling mill

Abstract

The invention relates to a control method for realizing automatic zero approach of an aluminum cold rolling mill by utilizing the difference in roll diameter. This method determines the roll gap setting value by determining the contact rolling force and pressing rolling force parameters of the roll system, and using the roll diameter difference: the roll gap set value is calculated by calculating the roll diameter difference of the new and old roll system before and after the roll change , and give two roll gap values ​​in stages, that is, the initial roll gap value and the secondary roll gap value; then, based on the above calculation parameters, automatic pressing is performed. The method of the invention improves the production efficiency and yield of the rolling mill, and avoids the occurrence of product quality defects caused by pressing.

Description

technical field [0001] The invention relates to a control method for realizing automatic zero approach of an aluminum cold rolling mill by utilizing the difference in roll diameter. Background technique [0002] At present, the domestic aluminum six-high cold rolling mill mainly produces various strip products with high surface quality requirements. Under normal circumstances, after replacing the rolls, it is necessary to re-calibrate and clear the roll system to obtain the zero reference of rolling force, roll gap position and tilt roll position. The rolling mill adopts manual pressing, the production efficiency is low, and quality defects such as roll marks caused by pressing frequently occur, which cannot meet the requirements of downstream users for high-surface quality products (such as the company's key products). For example, the domestic 1850mm six-roller irreversible aluminum single-stand cold rolling mill, in actual production, has been manually approached to zero...

AI Technical Summary

Problems solved by technology

The rolling mill adopts manual pressing, which leads to low production efficiency and frequent quality defects such as roll marks caused by pressing, which cannot meet the requirements of downstream users for products with high surface quality (such as the company's key products).

For example, the domestically produced 1850mm six-roller irreversible aluminum single-stand cold rolling mill, in actual production, always adopts the manual method after changing rolls, which is inefficient.

Especially after the production of products with high surface quality requirements, frequent quality defects caused by abnormal calibration have a great impact on the production efficiency of the rolling mill and the stability of product quality

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