CATIA装配设计Connector Assembly.docx

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