注塑模具設(shè)計(jì)技術(shù)中英文對(duì)照外文翻譯文獻(xiàn)

摩托車頭盔模具設(shè)計(jì)PAGE34PAGE35中英文資料對(duì)照外文翻譯英文：DesignandTechnologyoftheInjectionMold1、3DsolidmodeltoreplacethecenterlayermodelThetraditionalinjectionmoldingsimulationsoftwarebasedonproductsofthecenterlayermodel.Theusermustfirstbethin-walledplasticproductsabstractintoapproximateplaneandcurvedsurface,thesurfaceiscalledthecenterlayer.Inthecenterlayertogeneratetwo-dimensionalplanartriangularmeshes,theuseofthesetwo-dimensionaltriangularmeshfiniteelementmethod,andthefinalresultoftheanalysisinthesurfacedisplay.Injectionproductmodelusing3Dsolidmodel,thetwomodelsareinconsistent,twomodelinginevitable.Butbecauseofinjectionmoldingproductshapeiscomplexanddiverse,themyriadsofchangesfromathree-dimensionalentity,abstractionofthecenterlayerisaverydifficultjob,extractionprocessisverycumbersomeandtime-consuming,sothedesignofsimulationsoftwarehavefearofdifficulty,ithasbecomewidelyusedininjectionmoldingsimulationsoftwarethebottleneck.HSCAE3Dislargelyaccepted3Dsolid/surfacemodeloftheSTLfileformat.NowthemainstreamCAD/CAMsystem,suchasUG,Pro/ENGINEER,CATIAandSolidWorks,canoutputhighqualitySTLformatfile.Thatistosay,theusercanuseanycommercialCAD/CAEsystemstogeneratethedesiredproducts3DgeometricmodeloftheSTLformatfile,HSCAE3DcanautomaticallyaddtheSTLfileintoafiniteelementmeshmodel,throughthesurfacematchingandintroductionofanewboundaryconditionstoensurecoordinationofcorrespondingsurfaceflow,basedon3Dsolidmodelofanalysis,anddisplayofthree-dimensionalanalysisresults,replacingthecenterlayersimulationtechnologytoabstractthecenterlayer,andthengeneratemeshthiscomplicatedsteps,brokethroughsystemsimulationapplicationbottlenecks,greatlyreducingtheburdenofusermodeling,reducesthetechnicalrequirementoftheuser,theusertrainingtimefromthepastfewweeksshorterforafewhours.Figure1isbasedonthecentrallayermodelandsurfacemodelbasedon3Dsolid/flowanalysissimulationcomparisonchart.2、Finiteelement,finitedifference,thecontrolvolumemethodsInjectionmoldingproductsarethinproducts,productsinthethicknessdirectionofsizeismuchsmallerthantheothertwodimensions,temperatureandotherphysicalquantitiesinthethicknessdirectionofthechangeisverylarge,iftheuseofasimplefiniteelementandfinitedifferencemethodwillcauseanalysistimeistoolong,cannotmeettheactualneedsofmolddesignandmanufacturing.Weintheflowplanebyusingfiniteelementmethod,thethicknessdirectionbyusingfinitedifferencemethod,wereestablishedandplaneflowandthicknessdirectionscorrespondingtothesizeofthegridandcoupling,whiletheaccuracyisguaranteedunderthepremiseofthecalculationspeedtomeettheneedofengineeringapplication,andusingthecontrolvolumemethodissolved.Themovingboundaryproblemin.Forinternalandexternalcorrespondencesurfacedifferencesbetweenproducts,canbedividedintotwopartsthevolume,andrespectivelyformedthecontrolequation,thejunctionofinterpolationtoensurethatthetwopartharmonycontrast.3、NumericalanalysisandartificialintelligencetechnologyOptimizationofinjectionmoldingprocessparametershasbeenoverwhelmingmajorityofmolddesignstaffconcerns,thetraditionalCAEsoftwarewhileincomputersimulationofadesignatedundertheconditionsoftheinjectionmoldingconditions,butisunabletoautomaticallyoptimizethetechnicalparameters.UsingCAEsoftwarepersonnelmustbesettodifferentprocessconditionsweremultipleCAEanalysis,combinedwithpracticalexperienceintheprogramwerecomparedbetween,cangetsatisfactoryprocessscheme.Atthesametime,thepartsaftertheCAEanalysis,thesystemwillgeneratealargeamountofinformationabouttheproject(product,process,analyzestheresults),whichoftenresultsinavarietyofdataform,requiringtheusertohavetheanalysisandunderstandingoftheresultsofCAEanalysisability,sothetraditionalCAEsoftwareisakindofpassivecomputationaltools,canprovideuserswithintuitionistic,effectiveengineeringconclusion,tosoftwareusersdemandistoohigh,theinfluenceofCAEsysteminthelargerscopeofapplicationandpopularization.Inviewoftheabove,HSCAE3DsoftwareintheoriginalCAEsystembasedonaccuratecalculationfunction,theknowledgeengineeringtechnologyisintroducedthesystemdevelopment,theuseofartificialintelligenceistheabilityofthinkingandreasoning,insteadoftheusertocompletealargenumberofinformationanalysisandprocessingwork,directlyprovideguidingsignificancefortheprocessofconclusionsandrecommendations,effectivelysolvetheCAEofthecomplexityofthesystemandtherequirementsoftheusersofthecontradictionbetween,shorteningoftheCAEsystemandthedistancebetweentheuser,thesimulationsoftwarebytraditional"passive"computationaltoolsto"active"optimizationsystem.HSCAE3Dsystemartificialintelligencetechnologywillbeappliedtotheinitialdesign,theresultsoftheanalysisofCAEinterpretationandevaluation,improvementandoptimizationanalysisof3aspects.譯文：注塑模具設(shè)計(jì)的技術(shù)用三維實(shí)體模型取代中心層模型

傳統(tǒng)的注塑成形仿真軟件基于制品的中心層模型。用戶首先要將薄壁塑料制品抽象成近似的平面和曲面，這些面被稱為中心層。在這些中心層上生成二維平面三角網(wǎng)格，利用這些二維平面三角網(wǎng)格進(jìn)行有限元計(jì)算，并將最終的分析結(jié)果在中面上顯示。而注塑產(chǎn)品模型多采用三維實(shí)體模型，由于兩者模型的不一致，二次建模不可避免。但由于注塑產(chǎn)品的形狀復(fù)雜多樣、千變?nèi)f化，從三維實(shí)體中抽象出中心層面是一件十分困難的工作，提取過程非常繁瑣費(fèi)時(shí)，因此設(shè)計(jì)人員對(duì)仿真軟件有畏難情緒，這已成為注塑成形仿真軟件推廣應(yīng)用的瓶頸。

HSCAE3D主要是接受三維實(shí)體/表面模型的STL文件格式?，F(xiàn)在主流的CAD/CAM系統(tǒng)，如UG、Pro/ENGINEER、CATIA和SolidWorks等，均可輸出質(zhì)量較高的STL格式文件。這就是說，用戶可借助任何商品化的CAD/CAE系統(tǒng)生成所需制品的三維幾何模型的STL格式文件，HSCAE3D可以自動(dòng)將該STL文件轉(zhuǎn)化為有限元網(wǎng)格模型，通過表面配對(duì)和引入新的邊界條件保證對(duì)應(yīng)表面的協(xié)調(diào)流動(dòng)，實(shí)現(xiàn)基于三維實(shí)體模型的分析，并顯示三維分析結(jié)果，免去了中心層模擬技術(shù)中先抽象出中心層，再生成網(wǎng)格這一復(fù)雜步驟，突破了仿真系統(tǒng)推廣應(yīng)用的瓶頸，大大減輕了用戶建模的負(fù)擔(dān)，降低了對(duì)用戶的技術(shù)要求，對(duì)用戶的培訓(xùn)時(shí)間也由過去的數(shù)周縮短為幾小時(shí)。圖1為基于中心層模型和基于三維實(shí)體/表面模型流動(dòng)分析模擬情況對(duì)比圖。

2．有限元、有限差分、控制體積方法的綜合運(yùn)用

注塑制品都是薄壁制品，制品厚度方向的尺寸遠(yuǎn)小于其他兩個(gè)方向的尺寸，溫度等物理量在厚度方向的變化又非常大，若采用單純的有限元或有限差分方法勢(shì)必造成分析時(shí)間過長(zhǎng)，無法滿足模具設(shè)計(jì)與制造的實(shí)際需要。我們?cè)诹鲃?dòng)平面采用有限元法，厚度方向采用有限差分法，分別建立與流動(dòng)平面和厚度