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1、英文資料翻譯PavementMaintenanceMachineIntroductionTheforerunneroftoday’sgenerationofcoldplanersweredevelopedinthe1970’s.Earlymachineswereeitherbasedonagraderorasubgradetrimmingmachine.Machinedesignhasnowsettleddown.Basicparameterssuchaspowertocuttingwidthandweighttocutt
2、ingwidthratioareremainingrelativelyconstant.Today’smachinesarecapableofmuchhigherproductionandthereliabilityofequipmentishigher.Roadmillingmachinesin1984Presentdesignofmachinesfromallmanufacturersconsistofthreebasicsystems.PowerunitThiswillbeadieselenginewhichwill
3、providepowerforbothforwardmovementonthemachineandtocuttingdrum.Powermaybetransmittedtothecuttingdrumviahydraulicormechanicalsystem.Ingeneraltherewillbebetween1~1.75horsepowerpercmofcuttingwidthofthedtum.CuttingdrumAllmachineswillhaveacuttingdrumandonmachinesof2mdi
4、ameterandoverthedrumnormallyhasadiameterofapprox1m.Thisdrumwillbelacedwithaseriesoftungstencarbideteethandingeneraltheseareofthepointattackstyle.Thedrumwillberigidlymountedinaframeordirectlymountedtothechassis.Thedepthofcutiscontrolledbyeithermovingthedrumassembly
5、upordownorthewholechassissisraisedandloweredonitssupportingwheelsortracks.ConveyingsystemMostofthelargermachinescurrentlymadehavetheirownelevationsystemwherebycutmaterialispickedup,placedonaconveyoranddepositedinawaitingtruck.Alltheabovefunctionsarecontrolledfromo
6、necentralarea.Onemanwilldriveandoperatethemachine.Itislikelythathewillhaveonemanworkingwithhimwhowillcheckthecuttingdepthfromthegroundandmakenecessaryalterationstothedepthofcut.MethodofoperationofcoldplaningmachinesTherearevirtuallynospecificationswrittenbyanycoun
7、trythatcovercoldplaning.Inmostcountriesamachineiscalledforwhichwillefficientlyremovearoadsurfacetoagivendepthwithagivenaccuracy,normally±3mm.Themethodbywhichthemachinedoesthisisnotusuallyspecifiedwiththeexceptionthatcoldmillingandself-loadingmaybespecified.Oncethe
8、separamentershavebeensettleditisuptothevariousmanufacturersoftheequipmenttoputforwardwhattheyconsidertobethemosteconomicwayandmostproductivewayofdoingth
