CATIA装配设计Connector Assembly.docx
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CATIA装配设计Connector Assembly.docx
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CATIA装配设计ConnectorAssembly
ConnectorAssembly
Inthisexercise,youwillassemblethedifferentcomponentsmakinguptheconnectorassemblyandlearnhowtoanalyzeanassembly.
Step
(1):
AssemblingComponents
1.StartanewCATProductassemblywithStartmenu+MechanicalDesign+AssemblyDesignorFile+New+Product.
Watchout :
withtheCATIACompanion,clickontheexerciseicon(loadmodel) :
thiswillopenadefaultemptyProduct.Then,selectFile+OpenmenuandclickontheCancelbuttonintheFileSelectionbox(Thisisanecessarystepthatwillsettheselectionpathfortherestofthisexercise).
2.Right-clickonthedefaultproductinthespecificationtreeandselectPropertiesoptioninthecontextualmenutogetthePropertiesdialogbox.
3.Type“AssemblyConnector”inthePartNumberfieldlocatedinthe“Product”tab:
Thenameisdisplayedinthespecificationtree:
4.Let’saddthecomponentsthatareready(=alreadydesigned)inthisassembly.
Right-clickontheblueConnectorAssemblyandselect“Existingcomponents…”under"Components"branchinthecontextualmenu(orusetheicon
orthemenuInsert+Existingcomponent…”)andinthefolderConnectorAssembly_MasterExercise,selectCATASMConnector_Shell.CATPart
5.Repeatthesameprocedureandselect:
CATASMConnector_Card_Assembly.CATProduct
Usingthe[ctrl]keyyoucouldhaveselectedandinsertedbothcomponentsatonce.
Thepartandtheassembly,areaddedinthegeometryandinthetree:
6.Nowlet’sduplicatetheshellforthebottompartoftheconnectorassembly:
CopytheConnectorShell
7.PasteitintoConnectorAssembly.
Thesecondinstanceoftheconnectorshellisaddedinthetreeandinthegeometry.Hint:
youdonotseeitinthegeometryasitisattheexactsamepositionasthefirstinstance.
8.Let’sgivesomemoreexplicitnamestotheinstances:
InPropertiesofthefirstinstance(i.e.:
ConnectorShell(Connectorshell.1))Keyin"TopShell"inthetop“Instancename”field;
9.Repeattheprocedureonthesecondinstanceandtype“Bottomshell”inthe“Instancename”field:
Bothinstancesarerenamedinthetree.
10.WithFile+SaveAllas..,savetheassemblyinyourworkfolderunderthename“ConnectorAssembly2”andmakeaPropagateDirectorybeforevalidating.
Step
(2):
PositioningComponents
Inthisstep,wewilldefineallthenecessaryconstraintstodefinetherelationbetweenthecardsubassemblyandthe2shells.
1.StartingfromtheConnectorAssembly2thatyousaved,let’sfirstfixthecardassemblyinspace:
itwillbethereferenceelement.
Inthetreeorinthegeometry,selecttheConnectorCardAssemblycomponentandclickonthefixicon
thecomponentisnowfixedinspace
2.Let’snowpositionthecomponentsinthegeometryroughlyastheywillbeassembledandinsuchawayastobeabletoselectallthenecessaryelementslatertoputtheconstraints.Wewillstartbyseparatingthe2shells:
-MakesurethattheConnectorAssemblyistheactivecomponent(bluenodeinthetree)
-Draganddropthecompassontothetopfaceofoneoftheconnectorshellinstancesuntilitturnsgreen
-SelecttheTopShellinstanceinthetreesothisonewillbemovedwiththecompass
3.Positionyourcursoranywherealongthezaxisonthecompassanddragupwards
4.TomovetheBottomShellnow,selectitinthetreeorinthegeometrytohaveithighlightedinorange(notethatthecompassstaysgreen)andinthesameway,moveyourcursoronthezaxisofthecompassanddragdownwardsthistime:
5.Nowlet’sfliptheBottomShelltohaveitmatchthetopone:
Selectthezyarconthecompass(seepictureabove)anddragalongituntiltheshellisflipped180degrees
6.Nowlet’srepositionthe2shellswithrespecttotheCard:
theybothneedtoberotated180degreesonthexyplaneofthecompass.
Multiselectwith[ctrl]keybothcomponents.Selectthexyarconthecompassanddragclockwiseuntilbothcomponentsareflipped180degrees
7.Nowthatallcomponentsareroughlyinplace,let’sstartconstrainingthem:
Wewillfirstsettheaxialconstraintsbetweentheholesofthetopshellandthecard.
Selecttheaxialicon
zoomontheleftholes,andselecttheinsideoftheleftholeonthetopshellandtheinsideofthecorrespondingholeonthecard:
Note:
donothesitatetozoom:
withtheinsideoftheholeselected,theholeaxisonlyappearswhenthezoomisbig.
Whentheconstraintisset,thetopshellmovesabovethecardsoastohavebothholeaxesperfectlyaligned(seerightpictureabove).The2redcirclesarethesymbolsshowingthecoaxialconstraint.
8.Repeatthesameprocedureontherightholeofthetopshellwithitscorrespondingholeinthecard:
Note:
thatbothcoaxialconstraintsappearas2CoincidencenodesunderthenewConstraintsnodeaddedinthetree.
Nowthetopshellcannotslideanymoreonthehorizontalplane,butitcanstillmoveupordown,solet’sfinishconstrainingitinthatdirection:
Selectthecontacticon
andthetopfaceofthecard.Thenrotatetheassemblysoastobeabletoselectthebottomfaceofoneofthestandoffsonthetopshell:
Note:
againdonothesitatetozoomenoughtobeabletoselectthebottomfaceofthestandoff.
TheSurfacecontactisaddedinthetreeand2squaresymbolsappearonthegeometry.
NowtheTopShellisfullyconstrainedwithrespecttotheCardassembly.
9.Nowlet’srepeatthesameproceduretoconstraintheBottomShelltothecard:
Doucle-clicktheaxialicon
soastokeepitonforbothholes.
-SelecttheinsideoftheBottomShellleftholeandtheinsideofthecorrespondingholeonthecard.Notethatyouneedtozoomtohavetheaxesshowingandtorotatethewholeassemblytobeabletoselecttheholeonthecard.
-Repeatfortherighthole.
Thecirclesymbolsareaddedonthegeometryandbothconstraintsappearinthetree.
10.FinallyconstraintheBottomShelltoCardintheverticaldirection:
SelecttheContacticon
andthebottomfaceoftheCard,thenrotateagainandzoomwelltobeabletoselectthetopfaceofoneofthestandoffs:
Thebottomshellautomaticallymovesupsoastomatchthetopshellaroundthecardassembly,
Thelastconstraintisaddedinthetree(Surfacecontact.6)andthe2squaresymbolsareaddedonthegeometry
Savetheconstrainedassemblywiththesamename(withFile+Save).
NotethatyoucancheckthattheassemblyisproperlyandfullyconstrainedbymovingallcomponentsapartwiththecompassandthenupdatingitwiththeUpdateicon:
allcomponentsmustbebackinplace:
Step(3):
Analysingtheassembly
Inthisstep,wewillanalyzeourConnectorAssemblyforclashes.
1.StartingfromtheConnectorAssembly2thatyousavedinstep2,checkthatthetopnodeisactive(=ConnectorAssemblynodeisblueinthetree)andpulldowntheAnalyzemenutogettheComputeClashoption:
The“ClashDetection”dialogboxisdisplayedempty.
2.Checkthatthetoppulldownlistissetto“Clash”andasyoucananalyzeclashesbetween2componentsonly:
let’sstartwiththeTopShellandtheConnectorCardAssembly.UsetheControlkeytomulti-selecttheminthetree.WhentheirnamesareintheClashDetectionboxlist,thenclickontheApplybutton:
3.NotethattheiconunderthelistshowsaredlighttoindicatetheClash.
Hereyouneedtoclickinthegeometryspacetobetterseewheretheclashis:
4.RepeatthesameanalysiswiththeBottomShell:
youwillfindthesameresult.
5.SavetheAssembly.
Step(4):
EditingPart
Inthisstep,wewilleliminatetheclashesbetweentheConnectorCardAssemblyandConnectorShellsbyeditingtheConnectorShellin-contextoftheassembly
TheideaistomakeanopeningintheConnectorShellsothattheCardSocketReceptaclecanstickoutoftheshell,andtoleaveasmallclearancespacearounditsothatitmountseasily.
Let’smodifythedesignoftheShell.
a)NotethatastheTopShellandtheBottomShellare2instancesofthesameShell,weonlyneedtomodifythesourceConnectorShell,itwillmodifybothinstances.
b)NotealsothatwedonotneedtoknowtheexactsizeoftheSocketReceptacle.Bydesigningincontext,wewillusetheouteredgesoftheSocketReceptacletoseta1mmclearancearounditwhenwedefinethepockettoremovethematerialtomaketheopening.
1.StartingfromtheConnectorAssemblythatyousavedinstep2or3(ConnectorAssembly_withClashesforus),hidethebottomshellcomponent
2.OpentheTopShellnodeinthetreeanddoubleclickontheConnectorShellCATParticon
toenterthePartDesignworkbench.
3.ThenselectthefrontfaceoftheConnectorSocketReceptacle
andentertheSketcher
4.SelecttheRectangletool
todrawtheprofileofthepocketaroundtheSocketReceptacle.
Notethatyoudraw2rectanglesatthesametimeasyouaredrawingonbothinstancesoftheShellatthesametime.
Notealsothatyoucandrawthepocketprofileroughlyhere–donottrytohaveanyexactvalues.
5.Tomakethingseasierandseebetter,wecanhidethesecondinstance,theBottomShell:
selecttheConnectorShell(BottomShell)nodeinthetreeandthehide/showtool
6.Nowlet’spositiontherectangleatexactly1mmdistancearoundtheSocketReceptacle:
Double-clickontheDimensiontooltokeepitactiveforawhile
7.SelecttheleftmostedgeofSocketReceptacleandtheleftsideoftherectangle
(Hint:
youmayhavetozoomorrotatetheconnectoralittletoselecttheedge)
Whenthedimensionisdisplayed,double-clickonittosetitexactlyto1mm
8.WhiletheDimensiontoolisstillon,selectthetopedgeoftheSocketReceptaclea
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