Title

NEWLY DEVELOPED UNIVERSAL CROWN CONTROLL MILL “HYPER UCM” FOR ROLLING OF HIGH-STRENGTH STEEL

NEWLY DEVELOPED UNIVERSAL CROWN CONTROLL MILL “HYPER UCM” FOR ROLLING OF HIGH-STRENGTH STEEL

Authorship

Masuda, Toyotsugu; Maeno, Ichiro; Yasunari, Shin-ichi; Higuchi., Hajime

Masuda, Toyotsugu

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Maeno, Ichiro

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Yasunari, Shin-ichi

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Higuchi., Hajime

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DOI

10.5151/2594-5297-22608

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Abstract

The demand of high-strength steel, for example “High-tensile strength steel” in the automotive industry and “Electrical (silicon) steel”, has been increasingly accelerated in recent years. Particularly in the cold rolling field, harder- and thinner-strip rolling techniques have become urgent requirements which must be dealt with. The HYPER UCM, which was newly developed for rolling harder- and thinner-strips with a higher accuracy, provides a high degree of strip quality by the use of smaller work rolls driven by work roll drive system using new M-H spindle developed by Mitsubishi- Hitachi. HYPER UCM is the advanced 6 High UCM mill (Universal Crown Control Mill) which has best combination of work roll diameter, intermediate roll diameter and back up roll diameter in consideration of strip shape control ability and hertz stress between rolls. As a result, HYPER UCM has achieved 20-40% smaller work rolls compared with existing standard UCM mills’ under the work roll drive system. And, the one of key-technologies that realize HYPER UCM is high-performance work roll drive system consisting of optimally designed gear reducer and new M-H spindles. To drive smaller work roll, these components have been developed to keep sufficient rigidity and stability under the condition of high revolution. In this paper, Mitsubishi- Hitachi will highlight the specification, configuration and performance, which will be achieved by HYPER UCM in the tandem mill and reversing mill.

The demand of high-strength steel, for example “High-tensile strength steel” in the automotive industry and “Electrical (silicon) steel”, has been increasingly accelerated in recent years. Particularly in the cold rolling field, harder- and thinner-strip rolling techniques have become urgent requirements which must be dealt with. The HYPER UCM, which was newly developed for rolling harder- and thinner-strips with a higher accuracy, provides a high degree of strip quality by the use of smaller work rolls driven by work roll drive system using new M-H spindle developed by Mitsubishi- Hitachi. HYPER UCM is the advanced 6 High UCM mill (Universal Crown Control Mill) which has best combination of work roll diameter, intermediate roll diameter and back up roll diameter in consideration of strip shape control ability and hertz stress between rolls. As a result, HYPER UCM has achieved 20-40% smaller work rolls compared with existing standard UCM mills’ under the work roll drive system. And, the one of key-technologies that realize HYPER UCM is high-performance work roll drive system consisting of optimally designed gear reducer and new M-H spindles. To drive smaller work roll, these components have been developed to keep sufficient rigidity and stability under the condition of high revolution. In this paper, Mitsubishi- Hitachi will highlight the specification, configuration and performance, which will be achieved by HYPER UCM in the tandem mill and reversing mill.

Keywords

High-tensile strength steel; Small work roll; Work roll drive system; Spindle.

High-tensile strength steel; Small work roll; Work roll drive system; Spindle.