機(jī)械外文翻譯--虛擬制造在齒輪生產(chǎn)中的應(yīng)用.doc
《機(jī)械外文翻譯--虛擬制造在齒輪生產(chǎn)中的應(yīng)用.doc》由會(huì)員分享,可在線閱讀,更多相關(guān)《機(jī)械外文翻譯--虛擬制造在齒輪生產(chǎn)中的應(yīng)用.doc(15頁(yè)珍藏版)》請(qǐng)?jiān)谘b配圖網(wǎng)上搜索。
1、ApplicationofvirtualmanufacturingingenerationofgearsReceived:29November2004/Accepted:5May2005/Publishedonline:24November2005Spfinger-Verlag.LondonLimited2005AbstractThemanufacturingprocessofgearsisfairlycomplicatedduetothepresenceofvarioussimultaneousmotionsofthecutterandthejob.Inthispaper,anattempt
2、ismadetogeneratemeaningfuldesigndataforspurandhelicalgearsandthecorrespondingrackformcutternecessaryforthemanufacturing.Usingthisinformation,solidmodelsforthecutterandblankaredevelopedandfinallygear-manufacturingprocessesaresimulatedinavirtualmanufacturingenvironment.Theuserhastheoptiontochoosebetwe
3、endesignsandmanufacturemodeatwill.Theintegratedprocessmayalsohelptodevelopanoptimizedproduct.Forbetterunderstandingoftheoperationalprinciple,ananimationfacilityintheformofamovieisincludedinthepackage.KeywordsVirtualmanufacturing;Animation;Geargeneration1IntroductionAgearisaverycommonmachineelementin
4、mechanicalengineeringapplications.However,manufacturingofthegearseemstobefairlycomplicatedeventothepersonhavingthoroughtechnicalknowledgeintherelatedfield.Theconventionalgeargenerationprocesseslikeforming,shaping,hobbing,etc.areusuallyrepresentedintwo-dimensionalsketch.Theremaybesomecomponentsthatar
5、enotadequatelydescribedbythetwo-dimensionalapproach.Inthecaseofgeargeneration,itmaybedifficulttounderstandthecomplexgeometriesandthemanufacturingarrangementwiththehelpof2Dmodels.Theselimitationscanbepartiallyovercomeandunderstandingwillbemoremeaningfulifoneuses3Dsolidmodelsinstead.However,thedevelop
6、mentofthemodelsusing3Dsolidsmaynotalwaysensuretheclarityofthecomplexgeargenerationprocessunlessoneusesanimationtorepresenttilemotionofthegearblankandthegearcutter.Thiscanbeachievedveryefficientlywiththehelpofthevirtualmanufacturingtechnique.Itisatechnologytocreateavirtualenvironmentonthecomputerscre
7、entosimulatethephysicalworld.Theknowledgebaseandexpertisegainedfromtheworkinthevirtualenvironmentenablestheusertoapplythemmoremeaningfullyinreallifesituations.Ahostofliteratureisavailableonvirtualmanufacturingindifferentareasamongwhichsomeoftherecentandimportantworksarereferredbelow.TesicandBaneljee
8、1haveworkedintheareaofrapidprototyping,whichisanewtechnologyfordesign,visualizationandverification.Graphicaluserinterfaces,virtualrealitytechnologies,distillation,segregationandautointerpretationaresomeoftheimportantfeaturesoftheirwork.Balylissetal.2dealtwiththedevelopmentofmodelsinavirtualenvironme
9、ntusingthevirtualrealitytechnologiesprovidinganoutstanding3Dvisualizationoftheobject.In1994,G.M.Balylissetal.3presentedtheoreticsolidmodelingtechniquesusingtheVMtools,likeVP,MI,(virtualrealitymanufacturinglanguage)and3DSludioMax.Theyhavedevelopeddifferentpartsofanautomobileandthroughthespecialeffect
10、ofanimationimpartedallpossiblemotiontothemodel.ThetechnologyisfurtherenhancedbyKiulera4,whotreatedproductandprocessmodelingasakernelforthevirtualmanufacturingenvironment.Inhiswork,Kimurahasincorporatedsignificantmodelingissueslikerepresentation,representationlanguage,abstraction,standardization,conf
11、igurationcontrol,etc.ArangarasauandGadh5contributedtowardsthevirtualprototypingthatareconstructedusingsimulationoftheplannedproductionprocessusingvirtualmanufacturingonaplatformofMAYA,3DStudioMaxandVRML,etc.At.JadavpurUniversity,researchwork6,7isbeingcarriedouttosimulatethegearmanufacturingprocesses
12、usingAIIll)CADand31)StudioMaxasplatforms.Softwarehasbeendevelopedthathelpsthedesignengineerstounderstandtheproblemsrelatedtospurgearoperationanditsmanufacturingprocess.Astudyofthestateoftileartandliteraturereviewrevealthatthescopeofvirtualmanufacturingiswideopenforsimulatingspurgeargenerationprocess
13、es.Computersimulationcanbeveryeffectivelyusedforviewingalongwithaidingsubsequentanalysisofdifferentcomplicatedmanufacturingprocessesusingtheconceptofdesigncenteredvirtualmanufacturing.Withthisobjectiveinmind,anattemptismadetovirtuallymanufacturespurandhelicalgearsfromtheblankusingarackcutter.Thescop
14、eoftheworkincludesthegenerationofdesigndataforthespurandhelicalgearsandtherackformcutter,thegenerationofsolidmodelsforthecutterandblank,andfinallytosimulategear-manufacturingprocessthroughanimation.Themainmotivationoftheworkistosimplifythetaskofdesigning,andtostudythegeargenerationprocessthatcanbeun
15、derstoodbyalaymanandtopresentarealisticviewofit.Alltheprocessesaredevelopedontheplatformofthe3DStudioMax,whichisoneofthemostimportantvirtualtools.Thesoftwareisdevelopedusingmax-script,anobjectcontainedprogramminglanguagethatcanberunin3DStudioMaxenvironment.2DescriptionofthesoftwareThemax-scriptlangu
16、ageisbasicallyanimageprocessorthatcreatesthevisualeffectsin3DStudioMax.Inaddition,itcanbeusedfordesigncalculationandsubsequentchecking.Anattemptismadetodeveloptheentirepackageinmodularformsothatanyfurtherimprovementcanbeimplementedeasilywithoutaffectingtheothers.Theentireworkiscarriedoutina3Denviron
17、ment.ThemodularstructureoftheentirepackageispresentedinFig.l.Themajormodulesare:inputmodule,geardesignmodule,virtualmanufacturingmoduleandspecialmodule.Abriefdescriptionofthesemodulesismentionedbelow.2.1InputmoduleThismoduleisdevelopedtoprovideinputparametersthatareessentialfor(tiedesignanddevelopme
18、ntofthespurandhelicalgearsandthecorrespondingcutters.Inordertomakethesoftwareuserfriendly,theprocessofinputtingthedataisspecificallydonethroughaninputdialogue-boxcreatedbythemax-script-language.AsampledialogueboxisshowninFig.2.Somefieldshavesomerestrictionslikepredefinedlowerorupperlimitsorpredefine
19、dstepsforincrementordecrement.Thisisdonepurposivelytomaketheenvironmentmoreuserfriendlyandtorestricttheuserfromenteringinvaliddata,forexample,ausercannotmakethenumberofgearteethlessthan18.2.2Gear-designmoduleBeforegoingforthegenerationofthegears,oneshouldevaluatethevariousdesignparametersofthegearst
20、obemanufacturedbasedontheinputparameters.Inordertodesignagearpair,thefollowingdataareessential.IRpmatwhichthegearisrunning2.Thepowerbeingtransmitted3.ThetransmissionratiooftheassemblyInaddition,usersmayspecifythefollowingoperationalconditions/parameters:1.Precisionofthegearassembly2.Pressureangleoft
21、hegear3.Materialofthepinion4.Typeofshockloadrequiredforthepiniontotakeup5.HelixangleincaseofhelicalgearIftheuserisnotsatisfiedwiththeoutput,hecanmodifytheinputtoobtaindesiredoutput.Inthismodule,theentiredesignprocedureforthegearshasbeentreated.Thedifferentaspectsofdesigncalculations,forexample,dynam
22、icload,staticload(fatigueload)andthewearloadhavebeencalculatedinseparateprograms,andaredisplayedthroughtheoutputdialogbox.Whiledesigningthegear,ithasbeenkeptinmindthatthegearhastoformmeshwiththatoftherack,socarehasbeentakentoavoidtheinterferenceofthematingpair.2.2.1MethodologyVarietiesofgearcuttingp
23、rocessesareavailableandaregenerallybeingfollowedintheindustriesduringtheirmanufacturing.Inthispaper,Focusisgivenongearmanufacturingthroughgeneration.Theunderlyingprincipleofgeardesignisbasedonthefactthattheprofilesofapairofgearteethbearadefiniterelationshiptoeachothersuchthatthepairofteethhaveaprede
24、terminedrelativemotionandcontactateveryinstant.Therefore,iftherelativemotionoftheprofilesandtheformofoneofthemisknown,thedeterminationoftheformoftheothermayberegardedastileproblemcapableofsolutionbyeithergraphicaloranalyticalmeans.Theactualproductionofgeartoothrepresentsasolutiontotheaboveproblembym
25、echanicalmeansknownasgeneration.Thegenerationisamethodthatfollowsthefollowingprinciples.1.Acuttingedge(basicallyagearwithcuttingedges)isgivenamotion.Asaresult,itiscausedtosweepoutthesurfacecorrespondingtotheactualteethsurfacesoftheknownmemberofapairofconjugategears.2.Ablankismountedatanappropriatere
26、lationshiptothecutter.Itisgivenamotionthatthefinishedgearmusthaverelativetothatofthecutter.Asaresultofthesimultaneousmovementandthecuttingactionofthecutter,teethareformedontheblankconjugatetothatrepresentedbythecutter.Infactduetotheadditionoftherelativemotion,theprofilegiventotheworkpieceisdifferent
27、fromthatofthecutter.Thisdifferentiatesthegeneratingfromtheformingoperation.2.2.2SpurgearGenerationofspurgearbymeansofcuttercorrespondinginformtothematinggeariswellknown.Cuttermaybeintheformofarack.Foraninvolutesystemoftoothprofiles,thecuttercorrespondingtotherackwillhavestraightsides.Thearrangemento
28、fsuchacutterrelativetotheblankisshowninFig.3.Thecutterisadjustedradiallywithrespecttotheaxisofthework.Itisreciprocatedsothatitsedgesmaysweepoutthesurfaceoftheteethoftheimaginaryrackformingthebasisofthedesignofthetoothprofileoftheblank.Inadditiontothisreciprocation,thecutterisadvancedinthedirectionof
29、thepitchlineandatthesametimetheworkisrotatedaboutitsaxisataspeedsuchthatitispitchpointhasthesamelinearvelocityasthatoftherack.Inotherwords,thepitchcircleoftheblankandthepitchlineoftherackrolltogether.Inconsequencethestraightcuttingsedgesgeneratetheinvoluteprofileintheblank.Forsuchaprocesstobecontinu
30、ous,Thelengthofthecuttershouldbesomewhatlongerthanthepitchcircumferenceofthework;sincethisisusuallyimpracticableThecutteriswithdrawnfromtheworkafterithasadvancedadistanceequaltoallintegralnumberofpitchesandreturntoitsstartingpoint,theblankinthemeantimeremainsstationaryThisisrepeateduntilalltheteetha
31、recut2.2.3HelicalgearItiswellknownthatahelicalinvolutegearisconjugatetoastraightrackhavinginclinedteethTherefore,thesamemethoddescribedabovecanbeemployedtomanufactureahelicalgearHowever,thedirectionofreciprocationoftherackcuttermustbeinclinedtotheaxisoftheblankatallangleequaltothehelixangleofthegearThecuttermustrollovertheblankinadirectionsimilartothatdescribedearlierThesimultaneousmotioninvolvedandtheorientationof
- 溫馨提示:
1: 本站所有資源如無(wú)特殊說(shuō)明,都需要本地電腦安裝OFFICE2007和PDF閱讀器。圖紙軟件為CAD,CAXA,PROE,UG,SolidWorks等.壓縮文件請(qǐng)下載最新的WinRAR軟件解壓。
2: 本站的文檔不包含任何第三方提供的附件圖紙等,如果需要附件,請(qǐng)聯(lián)系上傳者。文件的所有權(quán)益歸上傳用戶所有。
3.本站RAR壓縮包中若帶圖紙,網(wǎng)頁(yè)內(nèi)容里面會(huì)有圖紙預(yù)覽,若沒(méi)有圖紙預(yù)覽就沒(méi)有圖紙。
4. 未經(jīng)權(quán)益所有人同意不得將文件中的內(nèi)容挪作商業(yè)或盈利用途。
5. 裝配圖網(wǎng)僅提供信息存儲(chǔ)空間,僅對(duì)用戶上傳內(nèi)容的表現(xiàn)方式做保護(hù)處理,對(duì)用戶上傳分享的文檔內(nèi)容本身不做任何修改或編輯,并不能對(duì)任何下載內(nèi)容負(fù)責(zé)。
6. 下載文件中如有侵權(quán)或不適當(dāng)內(nèi)容,請(qǐng)與我們聯(lián)系,我們立即糾正。
7. 本站不保證下載資源的準(zhǔn)確性、安全性和完整性, 同時(shí)也不承擔(dān)用戶因使用這些下載資源對(duì)自己和他人造成任何形式的傷害或損失。
最新文檔
- 深圳益田假日廣場(chǎng)商綜合體研究
- 有趣的漢字(教育精品)
- 有理數(shù)的乘方第一課時(shí)(教育精品)
- 閉合電路歐姆定律的運(yùn)用(教育精品)
- 第十課第2框(教育精品)
- 除數(shù)是兩位數(shù)的筆算除法例1
- 紅色大氣紀(jì)念改革開(kāi)放40周年P(guān)PT模板課件
- 孕期合理用藥_002
- 人教版八年級(jí)平面鏡成像市公開(kāi)課金獎(jiǎng)市賽課一等獎(jiǎng)?wù)n件
- 29 陌上桑_課件
- 100個(gè)人的村子[1]
- 1922-邊角邊課件
- 分?jǐn)?shù)的基本性質(zhì)1 (2)(教育精品)
- 《小數(shù)的意義(例1)》教學(xué)課件(教育精品)
- 《角的度量》課件3(完整)