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1、ChapterNineDRAWINGUSINGSURFACES115TostartyourSURFACESdrawing,gotonewdrawing,choosePART.OncethePartscreenappears,clickonSTART,chooseMECHANICALDESIGN,andthenWIREFRAMEandSURFACEDESIGN.Newiconswillappear,andthesearetheonesyouwilluseforyourSURFACEdrawings.116Thefirstthingyouwillwanttodois
2、layoutyourguidelines.YoucandothisbychoosingPOINTfromthetoolbar,andputtingthemwhereyouneedthem.Thefirstoneyouplaceisattheorigin,or0,0,0.HitOK.Thenplaceoneatx=50andoneatx=-50sothatyouareworkingoffofareferencepoint.117Nowwewillprofileanautobody…ChooseLINEfromthetoolbar,andtheLineDefinit
3、iondialogboxwillappear.InLINETYPE,pickPoint-Point,thenchoosethex=50pointaspoint1andx=-50aspoint2.HitOK.Nowwecancopythenewlycreatedlineover25mm.TodothisclickTRANSLATEfromthetoolbar,choosethelineasELEMENT,ZXplaneasthedirectionand25mmasthedistance.118WecannowRENAMEthefirstlinewemadeasCe
4、ntreline.Todothis,putyourpointeronthelinetohighlightitandrightclickonit.ThenchoosePROPERTIES.AtthePropertiesscreen,choosetheFeaturePropertiestab(clickon“more”ifyougettheshortdialogbox)highlightnamebeclickingonitandtypecentreline.HitOKtoreturntotheworkview.Nowwecanstarttomaketheautobo
5、dyshape.119ChoosetheZXplaneandthenclickonSKETCHER.Itisherethatwearegoingtoputinthepointstodefinethebasiccarshapeasshown.Pickpointandlayoutthepointsroughlyasshown.(Ifyoudoubleclickpoint,itwillstayactivetodomorethanonepointatatime).NowchooseSPLINEandjoinallofthepointstoformonesmoothlyc
6、urvedline.Thisisnowyourbasiccarshape.120NowwecandoafewTRANSLATIONSatthesametime.First,clicktheTRANSLATEicon,thenSketch1istheelement,ZXplaneistheDirectionanddistanceis25mm.ChooseTranslateagain.ThistimeTranslat.1fromthespecificationtreeistheelement,ZXplaneisagainthedirection,andthedist
7、anceis–85mm.Renamethislinecenteline2.121Wenowneedtoaddsomelinestothefrontandbackofthecartoguidethesurfacesthere.Jointhecentrelineandtranslat.1withaline.RenameitSIDESURFACEGUIDE.NowTRANSLATEthatline20mminusingSideSurfaceGuideastheelement,Translat.1Asthedirection.RenameitSideSurfaceCen
8、tre.Jointheo