CATIA基础教程8

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DRAFTINGandDIMENSIONING98Aproperlydimensioneddrawingofapartisveryimportanttothemanufacturingoutcome.WithCATIA,itcanbeaverysimpleprocess.ThissimpleGuideBlockwillshowbasicdimensioningformats.99ThereareafewsimplewaystogofromPartDesigntoDRAFTING.IfyoudoubleclickthePartDesignicon(toprighthandcorner)youwillaccessanavigationwindowasshown.Fromhere,youcanpickDRAFTING.PartDesigniconChooseDRAFTING100AnotherwaytodoitistoclicktheSTARTdrag-downmenuandchooseDRAFTING.Drafting101TheNEWDRAWINGCREATIONdialogboxwillappear.Thefirstthingtodoispickyourautomaticlayout.Next,youcanchooseMODIFYandchangeISOandANSIstandards,numberofsheetsandorientation,scaleandothers.Orangeshowsithasbeenchosen102Quicklythedrawingisgenerated.Alloftheviewsweaskedforinproperorientationtoeachother.Thisdrawingisnowreadyfordimensions.Sincethefrontviewishighlighted,wecanstartthere.103ClickonDIMENSIONINGfromthetoolbar……Andthenchooseacurvedsurfacetodimension.ChosensurfaceDIMENSIONING104IfdefaultisDIAMETER,thisiswhatyouwillsee.IfyouwishtodimensionaRADIUS,highlightthelineandrightclickonit.105WhenDIMENSIONTYPEappears,noticethatitisdefaulttoDiameter.HighlightRADIUSCenterandclickonit.106YourdimensionisnowaRadius.Lengthenandshortenthedimensionlinebydraggingit.ClickandDrag107YoucanaddnotesbeforeandafterthedimensionbyclickingontheredtrianglesRedtriangles108Thistextboxwillappear.Simplyclickintheemptyfieldnextto“TextAfter”andtypethenote.ClickonOKwhenyou’redoneandyournotewillappearinthedrafting.Typenotehere109Inthisexample,“TYP”wastypedtoindicatethedimensionisTYPICALfortheseradii.Afteryouhaveclickedintheboxtoenteryournoteasseenonthepreviouspage,pressthe“SpaceBar”oncetoleaveaspacebetweenthedimensionandyournoteasseenhere1Space110Alllinescanbedoneinthesameway.SimplypickthemandclickonDimension.Ifyouareworkingonalargedrawing,thissinglelinepickingwouldberathertedious.Thereisanotherway…111ClickonGENERATINGDIMENSIONSStepByStep.ThiswillallowCATIAtodothedimensioningforyouoneatatime,everyfewseconds,whatevertimeoutyouchoose.GeneratingDimensionsiconClickheretostartthedimensioning.112Oncealloftheautomaticdimensioningisfinished,youwillgetanANALYSISofwhatwasdone.113AftertheAutoDimension,youmaywanttogobackandmakechanges.Thisisassimpleashighlightingthedimensionandmakingtheappropriatechange.114

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