T-roll – for top productivity and supreme product quality
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T-roll – for top productivity and supreme product quality
Transcript of T-roll – for top productivity and supreme product quality
T-roll – for top productivityand supreme product quality
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T-ROLL
T-roll – a technology packagesets new standards
Many years of experience in serving the metals rollingindustry and the subsequent in-depth knowledge of the rolling process enabled SMS group to develop anadvanced cold rolling technology package significantlyimproving the production process.
“T-roll” incorporates new physical process models whichare capable of reflecting and simulating the rolling processin an innovative, extensive quality.
T-roll provides a better, fundamental understanding ofthe physical processes in the roll gap and opens com-plete new possibilities for process optimisation, productquality improvements and an increase of plant produc-tivity.
Offline service package for existing mills for theanalysis and subsequent improvement of the produc-tion process. Online integral tool in a mill set-up system or a level 1process control system Continuous rolling process analysis and monitoringtool
More profit due to higher yield and improved product quality
Precise mill and roll gap modelling
T-roll considers and describes the complex interdepend-ence of the mechanical, thermal and tribological aspectsof the rolling process in a new, singular approach.
The online application of T-roll provides complete newpossibilities for the design of the rolling process. Espe-cially when processing new or special materials the opti-mal operating conditions can be calculated and ensured.
Tribological process modelling
The tribological roll gap model is one of the highlights of T-roll. Tribology is a discipline concerned with thefriction, wear and lubrication of counteracting bodies. In conventional roll gap models the friction coefficient isassumed to be constant from roll gap entry to exit andthe dependence from the rolling speed is determinedempirically. In contrast to that the SMS group tribologi-cal model, based on a physical approach, calculates theevolution of the local friction coefficient in the roll gapas a function of various tribologically relevant parame-ters, like, for example, properties of lubricant, rough-ness of strip and roll, mechanical and thermal charac-teristics of pass, etc.
Precise mill and roll gap modelling
Impressive reference results
The improved performance of an existing reversing cold mill for grain-oriented silicon steel illustrates the impres-sive benefits provided by the T-roll technology.
In combination with the SMS group X-pact process control system, T-roll brought the following advantages:
clear improvement of strip gauge tolerancessignificant increase of rolling speedevident decrease of off-gauge lengthsreduced number of strip breaksadaptation and optimisation of the emulsion conditioningprevention of too high roll temperaturesease of operators‘ workdevelopment of new, improved pass schedulesreduced number of passes
Clear increase of rolling speed
The comparison of calculated and measured strip surface rough-ness of a 5 pass sequence shows the accuracy of the model.
Finish pass rolling of 0,652 mm down to 0,283 mmMeasured thickness deviations: 2-sigma = 2,10 μm
Increased mill performance illustrated for three materials
The competitive advantage
T-roll can be utilised for numerous mill applications –tandem mills, single-stand reversing mills, DCR mills,skin pass mills, multi-roll mills – processing differentmaterials such as steel, stainless steel, aluminium stripand foil, copper and brass.
Benefits
Improved cold rolling processIncreased productivityExcellent product qualityReduced operational costQuick return on investment
SMS group GmbH
Wiesenstrasse 3057271 Hilchenbach, Germany
Eduard-Schloemann-Strasse 440237 Dusseldorf, Germany
Phone: +49 211 881-1800Telefax: +49 211 [email protected] W
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“The information provided in this brochure contains a general description of the performance characteristics of the products concerned. The actual products may not always have thesecharacteristics as described and, in particular, these may change as a result of further developments of the products. The provision of this information is not intended to have and will nothave legal effect. An obligation to deliver products having particular characteristics shall only exist if expressly agreed in the terms of the contract.”
