14)How_to_create_a_Tire_Specification_2006CVT.ppt

SvenDidszunContinentalAG*,FromCuredTireDefinition“(CTDs)toarealtireThespecificationforSAV,SvenDidszunContinentalAG*,CoordinationofreferencegreentirewithcolleaguesfromPI,CTTandP&L:beaddesignsidewall/rimstripinnerliner/squeegeebeltpackageply/carcass,Existingdatatobecollectedwithregardtonewproduct(fromFEMand/orProject):articlenumberfromprojectleaderorBMmouldcavitydesigntreadpatterndataCTD(Curedtiredimensions),SvenDidszunContinentalAG*,CoordinationofreferencegreentirewithcolleaguesfromPI,CTTandP&L:beaddesignsidewall/rimstripinnerliner/squeegeebeltpackageply/carcass,Existingdatatobecollectedwithregardtonewproduct(fromFEMand/orProject):articlenumberfromprojectleaderorBMmouldcavitydesigntreadpatterndataCTD(Curedtiredimensions),SvenDidszunContinentalAG*,Mouldcavitylayout,Targetofthefinalizedspecificationistoreachthedefinedcross-sectioninthegivenmouldcavity,SvenDidszunContinentalAG*,Collectingtreadpatterndata,TreadpatterndatacoordinationduringFEMlayoutphasewithpatternlayoutergreentreadlayouthastobedoneaccordingly,SvenDidszunContinentalAG*,CuredTireDimensions(CTDs),targetcross-sectionforcomparisonwithrealcross-section.dimensionsofspecifiedtiremeetCTDs(withinspec.limits)targetcross-sectionreachedandtirescanbetested,ofcoldtirecross-section,SvenDidszunContinentalAG*,Determinationofpartswhichshouldbeused,e.g.beadsidewall/rimstripinnerlinerbeltpackageply/carcass(kindofply,notwidth),CriteriafordeterminingthegreenpartsduringdevelopmentprojectpartsaccordingtoperformanceinrequirementbookWideconsolidationwithplanttoolboxkeepcomplexityonalowlevelTheidealcaseisthepossibilitytouseanexistinggreentire,SvenDidszunContinentalAG*,Gatheringinformation,ReferencespecificationandReleaseNotesReleaseNotewasbasedonETO99797SpecificationofPilotserieshaddeviationtoETOGatheringinformationfromETOownerDecisiontousegreenpartsasdoneinETO99797,inthiscasethethickersidewallprofile,Example12R,SvenDidszunContinentalAG*,Preparationofspecification,InformationabouttheupcomingnewspecificationtotheresponsibledepartmentsCuringbladderlayoutCuretimecalculation,SvenDidszunContinentalAG*,Preparationofspecification,InformationabouttheupcomingnewspecificationtotheresponsibledepartmentsCuringbladderlayoutCuretimecalculation,Startofspecification,SvenDidszunContinentalAG*,Example12R22.5,InputfortheappropriateforminnertirediameterdistanceW:W(beadtobeadintire)mouldedbasewidthbeadtoediameterCheck,ifthecurrentcuringbladdertypecanbeusedOtherwisethecorrectbladdertypewillbedeterminedbytheresponsibledepartment,Curingbladderlayoutrequest,SvenDidszunContinentalAG*,InputfortheappropriateforminnertirediameterdistanceW:W(beadtobeadintire)mouldedbasewidthbeadtoediameterCheck,ifthecurrentcuringbladdertypecanbeusedOtherwisethecorrectbladdertypewillbedeterminedbytheresponsibledepartment,Example12R22.5,Curingbladderlayoutrequest,SvenDidszunContinentalAG*,Curingbladderlayoutrequest,SvenDidszunContinentalAG*,Example12R22.5,Curetimerequest,Tubeless/Tubetype,Inputfromcuringbladderlayout,dependsontheproducingplant(askProcessDevelopment),SvenDidszunContinentalAG*,Curetimerequest,fornewpattern,ifopenorcompactshoulder.,Requestedcuringtemperature,SvenDidszunContinentalAG*,Selection:-shouldercushionbeltedgecushionfromplanttoolbox,Selectionofassemblies:comparisonwithsimilarproductswhatoftheexistingcanbeused?“definitionofnewprofilesifnecessary,SvenDidszunContinentalAG*,Selection:-shouldercushionbeltedgecushionfromplanttoolbox,Selectionofassemblies:comparisonwithsimilarproductswhatoftheexistingcanbeused?“definitionofnewprofilesifnecessary,StartofETOtirebuilding,SvenDidszunContinentalAG*,CalculationofK:K“,WhatisthemeaningofK:K“?K:KmeansKernzuKern“theinsidedistancebetweenthebeadcoresonthebuildingdrum,WhyistheK:K“figuresoimportant?thepositionofthebeadcoreisfixedbytheK:Khighinfluenceontheouterdimensionsofthetire(thelowertheK:Kthelowerthetirewidth)K:Kfiguresignificantlyinfluencestheradialpressuredistribution(wearbehaviour),WhatisthefirststeptodeterminetheK:K?MeasuretheLNmeasurementinacross-sectiondrawing.,SvenDidszunContinentalAG*,CalculationofK:K“,WhattotakeintoaccountwithregardtoK:K?atoolowK:Kmightleadtopulled-throughplycordsduringshapingonSAVandstrained“cordsinthetireatoohighK:KmightleadtoS-orC-likebendedcarcassplycordsinthetire,WhatistheinfluenceofK:Kvaluevariation?smallvariationsoftheK:K(3mm)leadstohigherorlowerplyturn-upwhenchoosinghighervariationsplywidthadaptationshouldbeconsidered,HowistheK:Kvalueused?InputforTBS-SystemSettingfigureattheSAVforbuilding,SvenDidszunContinentalAG*,CalculationofK:K“,WhatisthedifferenceoftheK:Kinasketch(LN)andtheK:Katthebuildingmachine?differentplantshavedifferentbuildingmachinesthevaluehastobeadaptedaccordingtothefollowingtable(LN*factor),alsotobeconsideredduringtransfers,SvenDidszunContinentalAG*,Determinationofthecarcassplywidth,Whataretheinfluencingfactorsforthecarcassplywidth?outertireshapefixedbycavitynewK:K“mightleadtoanewplywidth,incaseoffixedK:K“:thewiderthecarcassthemoreoftheplyisavailablebesidethebeadcoreandthereforethehighertheplyturn-upwillbe,SvenDidszunContinentalAG*,Determinationofthecarcasplywidth,Whatarethemostimportantrulesfortheplyturn-up?specificationofplyturn-upheightsinDesignGuidesasCTDW31“Example:plyturn-upspecifiedfor295/60R22.5=30mm,step-offofplyturn-upandbeadreinforcement(s)hastobeconsidered,W31,Determinationofthecarcassplywidth,SvenDidszunContinentalAG*,Howcanthefinalplywidthbedetermined?DeterminetheK:Kvalueofthereferencegreentire.Thedifferenceindicatesthenewwidthwhenkeepingthesameplyturn-upheight.Measuretheplylengthinacross-sectiondrawingfromplyturn-upedgetoplyturn-upedge,Whichspecialitiesshouldbetakenintoaccount?Thewidthdeterminedbythedifference(acc.toA)orbythemeasuredvalue(acc.toB)shouldberoundedupordowninstepsof5mmExample:measuredwidthfromdrawing=487,5mmpossiblewidthscanbe485mmor490mmIMPORTANT:ChecktheplywidthwithPIdepartmentforcomplexityreasonThepositioningofthebeadgreenpartsshouldbecheckedandadapted,Determinationofthecarcassplywidth,SvenDidszunContinentalAG*,Whyshrinksthebeltwidth?thebeltdrumdiameterisingeneral1,5-2,5%lowerthanthebeltdiameterinthetirethegreentireispressedintothemouldsegmentsduringthemouldingprocessthecircumferenceofthebeltpackageincreases,Beltwidthshrinkage,Whatmeans“beltwidthshrinkage”?beltwidthreductionduetoincreasedcircumferenceofthebeltpackage,SvenDidszunContinentalAG*,Beltwidthshrinkage,Whatisspecialaboutthebeltshrinkage?besidethewidthofthebeltlayeralsotheanglechangeschangeoftheanglesisdifferentfromoutsidetowardsthecentrethehighestchangeoftheanglehappensinthecentre,Arethechangesoftheanglesforallbeltlayersandallbeltdesignsthesame?No,theanglesofthefirstlayerofatrianglebeltare50or60thisreducestheshrinkagethediamondbeltdesignsuffersfromthemissing50-or60-beltlayer,SvenDidszunContinentalAG*,Beltlift/Overallbeltlift,Beltlift,duringtheshapingprocessthegreentireisstretchedthefirsttimethegreentireispressedintothemouldsegmentsduringthemouldingprocess(beltlift)Theoverallbeltliftisthedifferenceofthebeltdrumdiameterandthebeltpackagediameterinthecuredtire,Whatisthebeltliftandtheoverallbeltlift?,SvenDidszunContinentalAG*,rmm=rbeltinmouldrbeltonbeltdrum,Radiusbeltinmould=(IDmould)-PT-L21-G1.n=rbeltinmould,Radiusbeltonbeltdrum=Beltdrumradius,Beltlift/Overallbeltlift,Tobeconsidered,becausefirstbeltlayerisdirectlyappliedonthisdiameter,SvenDidszunContinentalAG*,Beltlift/Overallbeltlift,Whyisitimportanttoknowthebeltlift?Targetofthespecificationistoreachthegivencross-sectionofthecuredtiredButthegreentireislaidoutbythespecificationDuringthemoulding/curingthegreenpartswillbedeformedandmovedThetreadmaterialwillbemovedduetotheshrinkageofthebeltThebeltliftisnecessaryforcalculationsofthesematerialflowsinadvance,SvenDidszunContinentalAG*,Howistheexactdifferencecalculated?thebeltliftisknownasapercentvaluefordifferenttiresizes(basedonnominalrimsize),Beltlift/Overallbeltlift,Calculationofthebeltliftbasedonthevaluesandthefollowingformula:,SvenDidszunContinentalAG*,Whatisbehindthetreadlayout?layoutoftheextrudedgreentreadprofilegeometry,Treadlayout,Whatarethespecialitiesofthetread?thetreadpatternoftherealtirecontainsgrooves,rips,sipesandblocksbesideotherdesignelementsthegreentreadasanextrusionproducthasaconstantshapeonitscircumferenceDuringthemouldingthetreadmaterialispressedintothemouldsegmentsthecorrectmaterialflowduringthemouldinghastobeensured,SvenDidszunContinentalAG*,Treadlayout,realtire,SvenDidszunContinentalAG*,Treadlayout,HowdoyouusetheManhattancurve?adaptationoftheroughsketchedcurvetoasmoothextrudablecontourtheareabelowbothcurvesisthesame!,SvenDidszunContinentalAG*,Treadlayout,Treaddie,HowdoIgetthisdrawing?InputofthecoordinatesoftheadaptedManhattancurveintoTBS,SvenDidszunContinentalAG*,Treadlayout,Attention:thewholetreadisshown!,Whatshouldbepaidattentiontointhemeasuringreport?deviationfromspecificationweighthastobeintarget,SvenDidszunContinentalAG*,Treadlayout,Howcanthesuccessofthetreadlayoutbeproved?checkthebeltappearanceinthecross-section(e.g.strongwaviness)checktheundertreaddepthvisualappearance,Exampleofwavybeltlayers,HowmanyETOloopsarenecessaryforatreadlayout?usually2to3loops,SvenDidszunContinentalAG*,Whyisthegreentirecircumferencecalculated?GreentirecircumferenceshouldbeloweroratleastequaltothemoulddimensionsinordertoavoidcompressionofgreenpartsduringmouldingAdditionalcontrolparameterduringtirebuilding,Calculationofgreentirecircumference,SvenDidszunContinentalAG*,HowisthegreentirecircumferencecalculatedforSAV?,Calculationofgreentirecircumference,Greentirecircumference=,Greentirediameter(onmachine)=(beltdrumdiameter+2(treadthickness+beltpackage)(1+beltlift),SvenDidszunContinentalAG*,Greenpartpositioning,Whatisthemeaningofthegreenpartpositioning?thepositionofthegreenpartatthebuildingdrummustbedefinedSupportinglasermarkingsatthebuildingdrumwillbeadjustedaccordingtopositioningItisnecessarytoknowthemeaningofthepositioningdescriptions,SvenDidszunContinentalAG*,Greenpartpositioning,Whatareasymmetricparts?Partsorassemblieswithdifferentdistancestotheleftortotheright,SvenDidszunContinentalAG*,Whathappensifthebasisforthepositioningisnotthecentreofthedrum(relativepositioning)?basedonanalreadypositionedgreenpartmeasuredtotheoutsideofthedrumnaming:letterD“toP“combinedwithO“forOutwards,Greenpartpositioning,SvenDidszunContinentalAG*,Greenpartpositioning,Whathappensifthebasisforthepositioningisnotthecentreofthedrum(relativepositioning)?basedonanalreadypositionedgreenpartmeasuredtotheoutsideofthedrumnaming:letterD“toP“combinedwithI“forInwards,SvenDidszunContinentalAG*,Greentirelayout(Explo“),Whatisagreentirelayout(GTL)?TheGTLisavisualisationoftheinformationofagreentirespecificationThesinglegreenpartsorassembliesareshowninthesamescaleandatthepositionwheretheywillbeappliedatthebuildingdrumThevisualisation