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1、英文資料翻譯PavementMaintenanceMachineIntroductionTheforerunneroftoday’sgenerationofcoldplanersweredevelopedinthe1970’s.Earlymachineswereeitherbasedonagraderorasubgradetrimmingmachine.Machinedesignhasnowsettleddown.Basicparameterssuchaspowertocuttingwidthandweighttocuttingwidthratioareremai
2、ningrelativelyconstant.Today’smachinesarecapableofmuchhigherproductionandthereliabilityofequipmentishigher.Roadmillingmachinesin1984Presentdesignofmachinesfromallmanufacturersconsistofthreebasicsystems.PowerunitThiswillbeadieselenginewhichwillprovidepowerforbothforwardmovementonthemac
3、hineandtocuttingdrum.Powermaybetransmittedtothecuttingdrumviahydraulicormechanicalsystem.Ingeneraltherewillbebetween1~1.75horsepowerpercmofcuttingwidthofthedtum.CuttingdrumAllmachineswillhaveacuttingdrumandonmachinesof2mdiameterandoverthedrumnormallyhasadiameterofapprox1m.Thisdrumwill
4、belacedwithaseriesoftungstencarbideteethandingeneraltheseareofthepointattackstyle.Thedrumwillberigidlymountedinaframeordirectlymountedtothechassis.Thedepthofcutiscontrolledbyeithermovingthedrumassemblyupordownorthewholechassissisraisedandloweredonitssupportingwheelsortracks.Conveyings
5、ystemMostofthelargermachinescurrentlymadehavetheirownelevationsystemwherebycutmaterialispickedup,placedonaconveyoranddepositedinawaitingtruck.Alltheabovefunctionsarecontrolledfromonecentralarea.Onemanwilldriveandoperatethemachine.Itislikelythathewillhaveonemanworkingwithhimwhowillchec
6、kthecuttingdepthfromthegroundandmakenecessaryalterationstothedepthofcut.MethodofoperationofcoldplaningmachinesTherearevirtuallynospecificationswrittenbyanycountrythatcovercoldplaning.Inmostcountriesamachineiscalledforwhichwillefficientlyremovearoadsurfacetoagivendepthwithagivenaccurac
7、y,normally±3mm.Themethodbywhichthemachinedoesthisisnotusuallyspecifiedwiththeexceptionthatcoldmillingandself-loadingmaybespecified.Oncetheseparamentershavebeensettleditisuptothevariousmanufacturersoftheequipmenttoputforwardwhattheyconsidertobethemosteconomicwayandmostproductivewayofdo
8、ingth
