A Control Method for Realizing Automatic Zeroing of Aluminum Cold Rolling Mill Using Roll Diameter Difference

A control method and roll diameter difference technology, applied in rolling mill control devices, metal rolling, metal rolling, etc., can solve problems such as unsatisfactory requirements, low production efficiency, and low efficiency, so as to avoid product quality defects and improve production efficiency effect

Active Publication Date: 2018-12-18
CHINALCO RUIMIN
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  • Application Information

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

Method used

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  • A Control Method for Realizing Automatic Zeroing of Aluminum Cold Rolling Mill Using Roll Diameter Difference

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Experimental program
Comparison scheme
Effect test

Embodiment approach

[0057] The first step: meet the pressing conditions;

[0058] Step 2: Give certain parameters such as bending roll and tilting roll value, roll gap position, rolling force, etc., and start the pressing system after the actual value of bending roll meets the requirements;

[0059] Step 3: After the pressing system is started, open the rolling oil system;

[0060] Step 4: After the rolling oil is turned on, set the roll gap value for the second time in APC mode: G ref =G 二次 , continue to press the upper cylinder at a low speed until T Act =T 接触 (of which: G ref : given roll gap value, T Act : Actual rolling force, T 接触 : Roll contact rolling force);

[0061] Step 5: Start the main motor, and set the rolling force T ref =T 压靠 , here take 800 tons ((of which: T ref : Given rolling force, T 压靠 : the roller system presses against the rolling force);

[0062] Step 6: After satisfying the zero-clearing condition of the roller system pressure contact, clear the related valu...

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Abstract

The invention relates to a control method for utilizing a roller diameter difference to achieve automatic pressing zeroing of an aluminum cold rolling mill. The method comprises the steps of determining given roller gap values by determining the parameters of contact rolling force and squeezin rolling force of roller systems and utilizing the roller diameter difference, wherein the given roller gap values are calculated by calculating the roller diameter difference of the new and old roller systems before roller replacement, and the two roller gap values including the initial roller gap valueand the secondary roller gap value are given by stages; conducting automatic pressing on the basis of the calculation parameters. By means of the method, the production efficiency and finished productratio of the rolling mill are increased, and the occurrence of product quality defects caused by pressing is avoided.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/00
Inventor 王积友赵平新周国彬欧祈武黄金哲
Owner CHINALCO RUIMIN
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