摊铺机的熨平板外文翻译.docx

摊铺机的熨平板外文翻译.docx

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摊铺机的熨平板外文翻译

Paverscreed

1.1FunctionFulfilledbytheScreed

Thescreed,theroadpaver‘sworkingtool,fulfilsthefunctionofuniformlycompactingthepavingmaterialacrosstheentirepavewidthandproducingaclose-texturedandlevelsurface.Thescreed‘scompactingsystemsshallpre-compactthemixtothegreatestpossibleextent.Thisistominimizetheinfluenceoflayerthicknessupontheamountofsubsequentcompactionbyrollingwhenbringingaboutthepavement’sfinaldensity.

Forpre-compaction,differentcompactingsystemsareavailable:

T=Tamper（aneccentricshaftcausesthetamperbartomoveupanddown）

V=Vibrators（vibrationsaregeneratedbyaneccentricshaftactingonthescreedplatesatrightanglestothedirectionofmotion）

P=PressureBar（s）（thepressurebar（s）arehydraulicallypressedontothemixatafrequencyof68Hz（approx.）andamaximumpressureof130bar）

P1=Screedequippedwith1PressureBar

P2=Screedequippedwith2PressureBar

1.2ExtendingScreedsandBolt-onExtensions

ForallVOGELEscreeds,bolt-onextensionsareavailable.TheVOGELEsystemofbolt-onextensionsallowstoeasilyandsturdilybuildupscreedstoanypavewidthdesired.Evenwhenpavinginlargewidths,VOGELEscreedsworkwithhighestprecisionandachievesuperbdegreesofuniformdensityrightuptothepavementedges.Whenfittingbolt-onextensions,caremustbetakentoensurethatthebottomedgeofthescreedplateisflushwiththeadjacentunits,otherwiseastepmaybeproducedinthepavementorthescreedplanninganglemaychange.Duringthepavingprocess,thiscanhaveanegativeeffectonpre-compaction,surfacestructureandfloatingbehaviourofthescreed.

1.3Set-UpoftheExtendingScreed

1.Positionbothextendingunitsinplacesothatthescreedplateofthebasicunitandthescreedplatesoftheextendingunitsareroughlylevel.

2.Slackenthechainsconnectingthespindlesontheextendingunitsothateachspindlecanbeadjustedindependently.

3.Carefullylowerthescreedontotheextendingunits.Timbershouldbeplacedunderthemiddleofthetwoextendingunits.

4.Nowadjustthescreedplanningangleviathetowpointramssothatthescreedplaterestsonthetimber.

5.Removethelockingscrewfromthethreadedbushonallspindles.

6.Adjustallthreadedbushes.

7.Refitthelockingscrews.

8.Raisethescreedandsecureitsothatitcannotsink.

9.Layaruleralongtheinnerandouterspindlepairsandthenadjusttheheightoftheextendingunitviathefrontandrearspindleswiththeaidofaspecialwrench,sothatthescreedplateofthebasicunitislevelwiththetrailingedgeoftheextendingunit.Nowadjusttheplanningangleoftheextendingunitviathefrontspindle.

10.Reconnectthespindlepairswiththechains.

11.Raisetheframeoftheextendingunitbyapprox.4mmsothatitroughlycorrespondstotheplanningangleofthescreed.

12.Duringthefirston-sitejob,theheightoftheextendingunitsmustbecorrecteduntilalongitudinalstepisnolongervisible.

1.4Fixed-WidthScreeds

1.4.1CompactingSystemsInstalledinFixed-WidthScreeds

TV=TamperandVibrators

Installedin:

-SB250-SB300

Recommendedfor:

-Allconventionalmixes.

-Materialswhichareeasytocompactorthinnerpavementlayers.

-Jobswherepavingcanbedoneinalargelyconstantwidth.

-Largeradii.

TP2=Tamperand2PressureBars

Installedin:

-SB250（andHydraulicBolt-onExtensions）

-SB300（andHydraulicBolt-onExtensions）

Recommendedfor:

-Allconventionalmixes.

-AscreedinTP2versionachievesahighpre-compactionevenofthickpavementlayers.

-Mixeswhicharedifficulttocompactonaccountoftheirgrainshapeandconsistency.

-Jobswherepavingcanbedoneinalargelyconstantwidth.

-Largeradii.

-Lesseffortrequiredforsubsequentcompactionbyrolling.

TP1=Tamperand1PressureBar

Installedin:

-SB250（andHydraulicBolt-onExtensions）

-SB300（andHydraulicBolt-onExtensions）Recommendedfor:

-Allconventionalmixes.

-Pre-compactionbyascreedinTP1versionishigherthanbyaTVscreed,butlowerthanbyascreedinTP2version.

-Jobswherepavingcanbedoneinalargelyconstantwidth.

-Largeradii.

-Lesseffortrequiredforsubsequentcompactionbyrolling.

TVP2=Tamper,Vibratorsand2PressureBars

Installedin:

-SB250-SB300-SB250B

Recommendedfor:

-Jobswherepavingcanbedoneinalargelyconstantpavewidth.

-Largeradii.

-SB250,SB300:

Allconventionalmixes.

-SB250B:

ForpavingPCC?

asthistypeofjobdoesnotincludesubsequentcompactionbyrolling.

1.4.2Fixed-WidthScreedsandBolt-onExtensions

Asageneralrule,bolt-onextensionsshouldbefittedsymmetricallyonbothsidesofthescreed,whereverpossible.TheadvantageofaFixed-WidthScreedisadeeperscreedplateof500mmcomparedtoascreedplateof250mmfoundonExtendingScreeds.Thishasapositiveeffectuponthescreed‘sfloatingbehaviour.

Moreover,theleadingedgeoftheFixed-WidthScreedformsasinglelineovertheentirepavewidthanddifferentplanninganglesdonotleavemarksinthepavement.Fixed-WidthScreedsarecapableofhandlingconsiderablylargerpavewidthsthanExtendingScreeds,albeitwithrestrictionsasregardsthescreed‘svariability.Asaresult,Fixed-WidthScreedsareparticularlysuitedtopavinglongsectionswithalarge,unchangingpavewidth.

1.4.3BuildingUpaFixed-WidthScreedwithBolt-onExtensions

Bolt-onextensionsarefittedtoenlargethescreed’swidth.Thetrailingedgesofthescreedplatesshallbeflushacrosstheentirepavewidth.Theleadingedgesofthescreedplatesshouldbesethighertowardstheoutsidebyroughly0.5mm.

Inordertopreventthebolt-onextensionsfrombendingtowardstherearasaresultofthepressureexertedbythemix,horizontalbracesmustbefitted.

Horizontalbracesaretobefittedinsuchawaythatthetrailingedgesofthescreedplatesareflush.

Tocompensatetheupliftattheouteredgesofthescreed,thereshouldbealightsagofthescreedwhenraised.Themagnitudeofthissagdependsonthepavewidth.Thesagcanbeadjustedbywayofthebracesoverthescreed’sbasicunit.

1.5Set-UpofTamper

Thetampershallbesettoanidenticalstrokelengthacrosstheentirepavewidth.Thesettingcanbechangedbysimplyturningtheeccentricbushontheshaftdrivingthetamperbar.Thedrivingshaftisaccessiblefrombehind,sothatthiscaneasilybedonebetweenjobsitesections.Adjustingthelowerreversalpointofthetamperbar,however,takesmoretime.First,thetampershieldsneeddemounting.Thenremovethescrewsonallshaftbrackets.Afterlooseningthelockingnut

（2）,thetamperbarcanbeadjustedviabolt

（1）.Theheighttobesetdependsonthetamperstrokeselected.

1.6Set-UpofTamperShield

Thetamper（3）mustbesetsothatitrestsonthewearstrip

（1）acrossthefullwidth.Thenadjustthespringsteelbar

（2）onthetampershieldbymeansofscrew（4）fromtherearofthescreeduntilagapof0.5-1mmisobtainedbetweentamperbarandthespringsteelbar.Releasescrews（6）andfitvarioussmallshims（5）toalignthetampershield.Withthetampershieldcorrectlyaligned,thespringsteelbar

（2）isatleastparallelwiththetamperorpreferablyinclinedslightlytothefront.Checktheclearancebetweentamperandspringsteelbarandcorrect,ifnecessary.

Tip!

Atastrokelengthof2mm,thetamperbarshouldbeflushwiththescreedplate

（checkwithyourhand）.

1.7Set-UpofPressureBar（s）

1.Unscrewthenut

（2）withanti-twistdevice（3）onthehydraulicram

（1）forthepressurebar.

2.Turnthehydraulicram

（1）toadjusttheheightofthepressurebar.Theclearance（7）betweenpressurebarandbottomedgeofthescreedplateshouldbeatleast4mm.

3.Checkthatthehydraulicramforthepressurebarmakescontactwithmetalplate（5）whenretracted.

4.Setpre-tensionofspring（6）to5.5mmvianut（4）toyieldadistance（8）of59.5mm.

5.Resecurethehydraulicram（3）forthepressurebar.

1.8BevelIrons

Bevelironsshapeandcompacttheedgesofthepavement.Theyareavailablewithabeveledgeof45°and60°.Theirsizedependsonthethicknessofthelayertobepaved.Aheatingrodcanbeinstalledasanoptiontoimprovetheslidingpropertiesofthebeveliron.

1.9FunctionCheckofScreedHeating

Allscreedcomponentsincontactwiththehotmixshouldbeheatedtoapprox.90°Cbeforestartingwork.Itisrecommendedtoprotectthescreedagainstexcessivelossofheattothesurroundingssothattheheatingpowercanbeutilizedeffectively,forinstancebyputtingdownthescreed,preferablyonhotmix.Asphaltmaysticktothetamperbar,screedplatesorpressurebar（s）ifthescreedtemperatureistoolow.Thiscanleadtotheformationofstripsandanirregularsurfacetexture.Thefloatingbehaviourofthescreedmayvarybeforeitreachesitsoperatingtemperature,withtheresultthatlayerthicknessmayalsovaryanddeviatefromthedesiredone.Forthe“dash2“machines,amonitoringunitforscreedheatingisavailableasanoptionalextra.Thisfeaturemonitorseachsingleheatingrodforproperfunctionandindicatesanyfaultwithoutdelay.

Shouldoneofthegreenindicatorlightsextinguishoveraprolongedperiodoftime,thenthereasonmaybe:

nPoorinsulation

nAsymmetricalpowerconsumption

nGeneratortemperaturetoohigh

Tip!

Directlyafterswitchingonscreedheating,correctoperationoftheheatingrodscanbecheckedbycautiouslytouchingthetamperbar,screedplatesandpressurebar（s）.

Advantage：

Afailureofheatingrodsisdetectedimmediately.Newpartscanbeprocuredwithoutdelaytoprompt