汽车基础造型课件

TostartyourSURFACESdrawing,gotonewdrawing,choosePART.OncethePartscreenappears,clickonSTART,chooseMECHANICALDESIGN,andthenWIREFRAMEandSURFACEDESIGN.Newiconswillappear,andthesearetheonesyouwilluseforyourSURFACEdrawings.116TostartyourSURFACESdrawing1Thefirstthingyouwillwanttodoislayoutyourguidelines.YoucandothisbychoosingPOINTfromthetoolbar,andputtingthemwhereyouneedthem.Thefirstoneyouplaceisattheorigin,or0,0,0.HitOK.Thenplaceoneatx=50andoneatx=-50sothatyouareworkingoffofareferencepoint.117Nowwewillprofileanautobody…Thefirstthingyouwillwant2ChooseLINEfromthetoolbar,andtheLineDefinitiondialogboxwillappear.InLINETYPE,pickPoint-Point,thenchoosethex=50pointaspoint1andx=-50aspoint2.HitOK.Nowwecancopythenewlycreatedlineover25mm.TodothisclickTRANSLATEfromthetoolbar,choosethelineasELEMENT,ZXplaneasthedirectionand25mmasthedistance.118ChooseLINEfromthetoolbar,3WecannowRENAMEthefirstlinewemadeasCentreline.Todothis,putyourpointeronthelinetohighlightitandrightclickonit.ThenchoosePROPERTIES.AtthePropertiesscreen,choosetheFeaturePropertiestab(clickon“more”ifyougettheshort

dialogbox)highlightnamebeclickingonitandtypecentreline.HitOKtoreturntotheworkview.Nowwecanstarttomaketheautobodyshape.119WecannowRENAMEthefirstli4ChoosetheZXplaneandthenclickonSKETCHER.Itisherethatwearegoingtoputinthepointstodefinethebasiccarshapeasshown.Pickpointandlayoutthepointsroughlyasshown.(Ifyoudoubleclickpoint,itwillstayactivetodomorethanonepointatatime).NowchooseSPLINEandjoinallofthepointstoformonesmoothlycurvedline.Thisisnowyourbasiccarshape.120ChoosetheZXplaneandthenc5 NowwecandoafewTRANSLATIONSatthesametime.First,clicktheTRANSLATEicon,thenSketch1istheelement,ZXplaneistheDirectionanddistanceis25mm.ChooseTranslateagain.ThistimeTranslat.1fromthespecificationtreeistheelement,ZXplaneisagainthedirection,andthedistanceis–85mm.Renamethislinecenteline2.121 NowwecandoafewTRANSLATI6Wenowneedtoaddsomelinestothefrontandbackofthecartoguidethesurfacesthere.Jointhecentrelineandtranslat.1withaline.RenameitSIDESURFACEGUIDE.NowTRANSLATEthatline20mminusingSideSurfaceGuideastheelement,Translat.1Asthedirection.RenameitSideSurfaceCentre.Jointheotherendofthecarwithaline,butdonottranslateit,aswewilluseSideSurfaceCentreasthecentreofthecurvedsurface.122Wenowneedtoaddsomelines7NowmakethefirstsurfaceusingEXTRUDE.Clickontheicon,inthedialogboxpickTranslat.2asProfile.ZXPlaneasDirectionandextrusionLimit1as25mm.Reversedirectionifneeded,andclickOK.RenameitTOP.123Nowmakethefirstsurfaceusi8

NowclicktheSWEEPicon.ChooseCIRCLEastheProfiletype.WiththeGuideCurvetabpicked,chooseTranslat.1astheGuideCurve1.124 NowclicktheSWEEPicon.Cho9NowpicktheCenterCurvetab.Centreline2istheCentercurve,Translat1istheReferenceanglecurve.Enter–20intheangle2area.NowclickOK.125NowpicktheCenterCurvetab.10Nowwecandothefrontandbacksurfaces…ChooseSWEEPagainandentertheinformationasdonehereusingthepreviouslyrenamedlines…126Nowwecandothefrontandba11Yourcarshouldbegintotakeshapenow.Wewilldothesamethingfortheback…127Yourcarshouldbegintotake12Forthebackside,sidesurfaceguide2willbeGuideCurve.Noticewearegoingtorotatethissurfacearoundthesamecenterasthefrontone.EntertheCentercurveinformationasshown.RenameSweep1as“Side”,Sweep2as“Front”andSweep3as“Back”.NowwecanbegintoTRIMtheoverlap.128Forthebackside,sidesurfac13ThisistheTRIMicon.Wewillusethistotrimofftheoverlappingsurfaces.OnceyouclickontheTRIMicon,theTRIMDEFINITIONdialogboxwillappear.First,chooseTOPasElement1andSIDEaselement2.Youwillnoticethatonyourpart,anoverlapwillturnopaque.Ithisisthepartyouwanttoremove,hitOK,ifnot,clickonthe“Othersideofelement1or2”button.Oncethecorrectpartisopaque,clickApplyandOK.Fortheother2trims,followwhatisshown.Trim1andTrim2canbechosenfromthetree,buttheyaresimplytheTOPsurface,renamedbyCatia.129ThisistheTRIMicon.Wewill14HereishalfofthebasiccarshapewiththeextralinesremovedTheycanberemovedbyRightClickingonthelineyouwishtoremoveandclickingonHide/Show.130Hereishalfofthebasiccar15Nowmaketheotherhalfofthecar.ClicktheSYMETRYicon,andenterTrim3asElementandZXPlaneasReference.131Nowmaketheotherhalfofthe16Nowyoucanmakethe2halvesintoonewholewiththeJOINicon.IntheDialogBox,clickonTrim3andSymetry1thenOK.132Nowyoucanmakethe2halves17Nowwecanmakethepartasolid.GotoPartDesign.133Nowwecanmakethepartasol18ClickonCLOSEfromthetoolbarandclickonJoin1forObjecttoclose.134ClickonCLOSEfromthetoolba19NowyourbasiccarbodyshapeisSOLID.ReadyforyoutoFillet,Pocket,Render,orrefinetoyourspecifications.135Nowyourbasiccarbodyshape20TostartyourSURFACESdrawing,gotonewdrawing,choosePART.OncethePartscreenappears,clickonSTART,chooseMECHANICALDESIGN,andthenWIREFRAMEandSURFACEDESIGN.Newiconswillappear,andthesearetheonesyouwilluseforyourSURFACEdrawings.116TostartyourSURFACESdrawing21Thefirstthingyouwillwanttodoislayoutyourguidelines.YoucandothisbychoosingPOINTfromthetoolbar,andputtingthemwhereyouneedthem.Thefirstoneyouplaceisattheorigin,or0,0,0.HitOK.Thenplaceoneatx=50andoneatx=-50sothatyouareworkingoffofareferencepoint.117Nowwewillprofileanautobody…Thefirstthingyouwillwant22ChooseLINEfromthetoolbar,andtheLineDefinitiondialogboxwillappear.InLINETYPE,pickPoint-Point,thenchoosethex=50pointaspoint1andx=-50aspoint2.HitOK.Nowwecancopythenewlycreatedlineover25mm.TodothisclickTRANSLATEfromthetoolbar,choosethelineasELEMENT,ZXplaneasthedirectionand25mmasthedistance.118ChooseLINEfromthetoolbar,23WecannowRENAMEthefirstlinewemadeasCentreline.Todothis,putyourpointeronthelinetohighlightitandrightclickonit.ThenchoosePROPERTIES.AtthePropertiesscreen,choosetheFeaturePropertiestab(clickon“more”ifyougettheshort

dialogbox)highlightnamebeclickingonitandtypecentreline.HitOKtoreturntotheworkview.Nowwecanstarttomaketheautobodyshape.119WecannowRENAMEthefirstli24ChoosetheZXplaneandthenclickonSKETCHER.Itisherethatwearegoingtoputinthepointstodefinethebasiccarshapeasshown.Pickpointandlayoutthepointsroughlyasshown.(Ifyoudoubleclickpoint,itwillstayactivetodomorethanonepointatatime).NowchooseSPLINEandjoinallofthepointstoformonesmoothlycurvedline.Thisisnowyourbasiccarshape.120ChoosetheZXplaneandthenc25 NowwecandoafewTRANSLATIONSatthesametime.First,clicktheTRANSLATEicon,thenSketch1istheelement,ZXplaneistheDirectionanddistanceis25mm.ChooseTranslateagain.ThistimeTranslat.1fromthespecificationtreeistheelement,ZXplaneisagainthedirection,andthedistanceis–85mm.Renamethislinecenteline2.121 NowwecandoafewTRANSLATI26Wenowneedtoaddsomelinestothefrontandbackofthecartoguidethesurfacesthere.Jointhecentrelineandtranslat.1withaline.RenameitSIDESURFACEGUIDE.NowTRANSLATEthatline20mminusingSideSurfaceGuideastheelement,Translat.1Asthedirection.RenameitSideSurfaceCentre.Jointheotherendofthecarwithaline,butdonottranslateit,aswewilluseSideSurfaceCentreasthecentreofthecurvedsurface.122Wenowneedtoaddsomelines27NowmakethefirstsurfaceusingEXTRUDE.Clickontheicon,inthedialogboxpickTranslat.2asProfile.ZXPlaneasDirectionandextrusionLimit1as25mm.Reversedirectionifneeded,andclickOK.RenameitTOP.123Nowmakethefirstsurfaceusi28

NowclicktheSWEEPicon.ChooseCIRCLEastheProfiletype.WiththeGuideCurvetabpicked,chooseTranslat.1astheGuideCurve1.124 NowclicktheSWEEPicon.Cho29NowpicktheCenterCurvetab.Centreline2istheCentercurve,Translat1istheReferenceanglecurve.Enter–20intheangle2area.NowclickOK.125NowpicktheCenterCurvetab.30Nowwecandothefrontandbacksurfaces…ChooseSWEEPagainandentertheinformationasdonehereusingthepreviouslyrenamedlines…126Nowwecandothefrontandba31Yourcarshouldbegintotakeshapenow.Wewilldothesamethingfortheback…127Yourcarshouldbegintotake32Forthebackside,sidesurfaceguide2willbeGuideCurve.Noticewearegoingtorotatethissurfacearoundthesamecenterasthefrontone.EntertheCentercurveinformationasshown.RenameSweep1as“Side”,Sweep2as“Front”andSweep3as“Back”.NowwecanbegintoTRIMtheoverlap.128Forthebackside,sidesurfac33ThisistheTRIMicon.Wewillusethistotrimofftheoverlappingsurfaces.OnceyouclickontheTRIMicon,theTRIMDEFINITIONdialogboxwillappear.First,chooseTOPasElement1andSIDEaselement2.Youwillnoticethatonyourpart,anoverlapwillturnopaque.Ithisisthepartyouwanttoremove,hitOK,ifnot,clickonthe“Othersideofelement1or2”button.Once