Solutions for the Global Metals Industry
Solutions for the Global Metals Industry
Solutions for the Global Metals Industry
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Integrating Models <strong>for</strong> Superior ControlTMEIC’s automation system provides superior cold mill control based on accurate level 2 process models and integratedlevel 1 controls. Some process models are listed below along with <strong>the</strong> shape control block diagram.Level 2 Process Models Ensure Production of Quality ProductForce and Power ModelsForce, torque, and power modelswith <strong>the</strong> effects of tension andfriction.Flow Stress ModelsFlow stress models with <strong>the</strong>material chemistry and workhardening effects on elongation.Friction ModelsCompensation <strong>for</strong> coefficient offriction variations.Strain ModelIn-coil strain distribution.Thermal and wear effects on rolldiameter profile.InteractionsInteractions between tension,<strong>for</strong>ward slip, friction, and speed.Textured RollsThe coefficient of friction effectof textured rolls.Product VariationsProduct dependent transferfunctions <strong>for</strong> level 1 control.De<strong>for</strong>medRollRadiusEntryThicknessEntryTensionRollRadiusMetal De<strong>for</strong>mation ModelRollForceExitThicknessNRollForceDe<strong>for</strong>mationPowerPressure due toroll-strip frictionExit TensionRoll Wear ModelPressure due tometal de<strong>for</strong>mationresistanceReferences from <strong>the</strong> model provide <strong>the</strong> setup <strong>for</strong>level 1 controls, as shown in <strong>the</strong> diagram below.ShapeControlBlockDiagramOperatorRB AdjustRoll Side-ShiftPositionModelCMSetupModelThread/RunFeedbackFlatnessFeedbackType of RollBending andShiftRoll ForceRollContourModelRollWearModelRollThermalModelGround Roll CrownStack Crown VerniersStripTensionRollDeflectModelModelStripBucklingModelStrip PropertiesProfileVernierPDI EntryProfileRoll profileactuatorBucklingThresholdModelRoll GapContourPhysicalModelModelStripPhysicalModelRollGapCrownStrip Recalculation <strong>for</strong> Limit ConstraintsPass #Max/Min Roll Gap CrownsStripStrainRangePassConstraintsStrip ConstraintsPass #Per Unit Profile andStrip ConstraintsNo TensionThreadRunModelStripFlatness&ThicknessStrategy1. Run Condition2. Mill Fully Threaded3. Post Entry ThreadFlatnessRoll SensorBending &ShiftingReferencesControlClosed LoopFlatnessControl© 2011 TMEIC Corporation. All Rights Reserved.Page 17 of 40
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