Analysis of Causes and Remedy of Chattering in the Aluminum Four stand Tandem Cold Rolling Mill: A Case Study

The chattering of cold rolling mills is an undesirable phenomenon of mechanical vibrations, which reduces the productivity and product quality. Generally, chatter phenomenon observed in mostly high speed cold rolling of thin gauge at last and second last stand of tandem cold rolling mill. The chatte...

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Bibliographic Details
Published in:Journal of the Institution of Engineers (India) Series C 2022-02, Vol.103 (1), p.107-119
Main Authors: Vaidya, Vivek Anil, Vaidya, Nalini Vivek, Vaidya, Vaishnav Vivek
Format: Article
Language:English
Subjects:
Active control
Aerospace Technology and Astronautics
Aluminum
Aluminum base alloys
Case studies
Case Study
Cold
Cold rolling mills
Cold tandem mills
Damage prevention
Engineering
Industrial and Production Engineering
Mechanical Engineering
Rolling speed
Shape control
Strip
Vibration
Vibration monitoring
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Summary:The chattering of cold rolling mills is an undesirable phenomenon of mechanical vibrations, which reduces the productivity and product quality. Generally, chatter phenomenon observed in mostly high speed cold rolling of thin gauge at last and second last stand of tandem cold rolling mill. The chatter vibration causes unacceptable variation of gauge of the strip and visible pattern on the strip surface. This undesirable mill vibration also inflicts serious damage on mill equipment, limiting the rolling speed below designed operating rolling speed leading to production loss. This paper described the practical aspect of chatter vibration with case study from four stand aluminum cold rolling mill at Maaden aluminum rolling mill, KSA. The four stand cold rolling mill is four HI equipped with CVC for a shape control system capable of producing thinner gauge of 0.15 mm 2100 mm wide aluminum Alloy grade AA3104. An online monitoring of vibrations is installed which detects chatter and prevent further damage. The mill rolling speed is designed for 1800 m per minute, but speed limited to 1000 mpm due to mill chatter vibration. The causes and remedies are discussed and most influential factors which enable the chatter are addressed. End result obtained after application of optimum values of most influential active control factors shows there is improvement observed but not up to desired level.
ISSN:2250-0545
2250-0553
DOI:10.1007/s40032-021-00773-w