簡介:第1頁沖壓工藝及模具設(shè)計試題1答案一,填空題50分1冷沖模是利用安裝在壓力機(jī)上的模具對材料施加壓力,使其變形或分別,從而獲得沖件的一種壓力加工方法。(4)2沖壓加工獲得的零件一般無需進(jìn)行(機(jī)械)加工,因而是一種節(jié)約原材料,節(jié)約能耗的少,無(廢料)的加工方法。23性變形的物體體積保持不變,其表達(dá)式可寫成Ε1Ε2Ε30。24材料的沖壓成形性能包括(形態(tài)凍結(jié)性)和(貼模性)兩部分內(nèi)容。25,材料的應(yīng)力狀態(tài)中,壓應(yīng)力的成分(愈大),拉應(yīng)力的成分(愈?。欣诓牧纤苄缘陌l(fā)揮。26、用的金屬材料在冷塑性變形時,隨變形程度的增加,全部強(qiáng)度指標(biāo)均(提高),硬度也(提高),塑性指標(biāo)(降低),這種現(xiàn)象稱為加工硬化。37、件的切斷面由(圓角帶,光亮帶,剪裂帶,毛刺區(qū))四個部分組成。48、裁變形過程大致可分為(彈性變形階段,塑性變形階段,斷裂分別階段)的三個階段。310,在設(shè)計模具時,對尺寸精度,斷面垂直度要求高的工件,應(yīng)選用(較?。┑拈g隙值;對于斷面垂直度及尺寸精度要求不高的工件,以提高模具壽命為主,應(yīng)選用(較大)的間隙值。211、孔時,因工件的小端尺寸及凸模尺寸一樣,應(yīng)先確定凸模尺寸,即以凸模尺寸為基礎(chǔ),為保證凸模磨損到肯定程度仍能沖出合格的零件,故從孔凸?;境叽鐟?yīng)取(在制件的最大極限尺寸旁邊),而沖孔凹?;境叽鐒t按凸?;境叽纾由献钚〕跏茧p面間隙)。212、凸,凹模分別加工的優(yōu)點是凸,凹模具有(互換性),制造周期(短),便于(修理)。其缺點是(制造公差)小,凸,凹模的制造公差應(yīng)符合(ΔPΔD≤△Z)的條件。(5)13、搭邊是一種(工藝)廢料,但它可以補償(定位)誤差和(板料寬度)誤差,確保制件合格;搭邊還可(提高條料的剛性),提高生產(chǎn)率;此外還可避開沖裁時條料邊緣的毛刺被(拉入模具間隙),從而提高模具壽命。514、為了實現(xiàn)小設(shè)備沖裁大工件或使沖裁過程平穩(wěn)以減少壓力機(jī)的振動,常用(階梯凸模沖裁)法,(斜刃沖裁)和(加熱沖裁)法來降低沖裁力。315、導(dǎo)料銷導(dǎo)正定位多用于(單工序模)和(復(fù)合模)中,而導(dǎo)正銷通常及(側(cè)刃),也可及(擋料銷)協(xié)作運用。316、為了提高彎曲極限變形程度,對于側(cè)面毛刺大的工件,應(yīng)(先去除毛刺);當(dāng)毛刺較小時,也可以使有毛刺的一面處于(彎曲件的內(nèi)側(cè)),以免產(chǎn)生應(yīng)力集中而開裂。217、在彎曲變形區(qū)內(nèi),內(nèi)層纖維切向受(壓縮)應(yīng)變,外層纖維切向受(拉伸)應(yīng)變,而中性層(保持不變)。318、彎曲件需多次彎曲時,彎曲次序一般是先彎(外角),后彎(內(nèi)角);前次彎曲應(yīng)考慮后次彎曲有牢靠的(定位),后次彎曲不能影響前次已成形的形態(tài)。3三,簡答題(20分)1,什么是沖裁間隙沖裁間隙及沖裁件的斷面質(zhì)量有什么關(guān)系沖裁凸模及凹模橫向尺寸的差值稱為沖裁間隙。間隙小沖裁件的斷面質(zhì)量較好2、彎曲回彈的表現(xiàn)形式是什么產(chǎn)生回彈的主要緣由是什么彎曲回彈的表現(xiàn)形式為彎曲半徑的變化和彎曲角的變化。產(chǎn)生回彈的主要緣由是材料的力學(xué)性能,相對彎曲半徑,彎曲中心角,彎曲方式,模具間隙等。3、拉深變形區(qū)的應(yīng)力應(yīng)變的特點是什么拉深變形區(qū)為凸緣部分,切向為壓應(yīng)力,徑向為拉應(yīng)力,切向壓應(yīng)力的肯定值最大,所以在切向是壓應(yīng)變,徑向為拉應(yīng)變。4、拉深時簡單出現(xiàn)什么樣的質(zhì)量問題為什么凸緣的起皺和底部圓角R處的開裂,前者是因為切向壓應(yīng)力太大,后者是R處的塑性變形小,加工硬化現(xiàn)象弱。四,畫制件圖(畫制件圖(1010分)分)依據(jù)圖示的凹模簡圖1,畫出沖裁件的制件圖;2,畫出該沖裁件的排樣圖。福建農(nóng)林大學(xué)考試試卷福建農(nóng)林大學(xué)考試試卷()卷)卷得分一,填空題(每空1分,共21分)1.沖裁斷面的4個特征區(qū),分別是圓角帶,光亮帶,斷裂帶和毛刺,它們各自發(fā)生在變形分別第3頁一,填空題填空題2020分(每空格分(每空格1分)分)1,沖裁工序主要包括落料和沖孔。2,寬板彎曲變形屬于單向應(yīng)力狀態(tài),拉深變形是三向應(yīng)力狀態(tài)。3,彈壓卸料板具有壓料和卸料的雙重作用。4,材料的塑性越好,塑性變形的穩(wěn)定性越強(qiáng),許可的最小彎曲半徑就越小。5,沖裁件的切斷面由圓角帶,光亮帶,剪裂帶,毛刺四個部分組成。6,沖裁工件的校平模具主要有平面模和齒形模兩種。7,筒形件拉深過程中,凸緣部分的切向壓應(yīng)力使凸緣材料易產(chǎn)生起皺,主要防止措施采納壓料圈和施加大小合適的壓料力。8,依據(jù)材料的合理利用狀況,條料排樣法可分為有廢料排樣,少廢料排樣和無廢料排樣。二,單項選擇題單項選擇題2828分(每小題分(每小題2分,錯選分,錯選,漏選漏選,多選均不得分)多選均不得分)1,拉深后坯料的徑向尺寸(),切向尺寸(A)。A,增大減小B,增大增大C,減小增大2,有凸緣筒形件拉深,其中(A)對拉深系數(shù)影響最大。A,凸緣相對直徑B,相對高度C,相對圓角半徑3,以下工序不屬于伸長類變形的是(B)A,內(nèi)孔翻邊B,縮口C,脹形4,圓筒形制件在拉深成形時,一般是底部厚度略有變簿,且筒壁從下向上漸漸(A)A,厚度增厚B,厚度減簿C,硬度減少5,為使沖裁過程的順當(dāng)進(jìn)行,將梗塞在凹模內(nèi)的沖件或廢料順沖裁方向從凹模孔中推出,所須要的力稱為(C)。A,推料力B,斜料力C,頂件力6,點的主應(yīng)力狀態(tài)圖有(C)種。A,3種B,6種C,9種7,分開加工的凸模,凹模,為了保證凸模及凹模的沖裁間隙,它們的制造公差必需滿意的條件是(B)。A,B,ZZDPMINMAX?????ZZDPMINMAX?????C,ZZDPMINMAX?????8,彎曲件為(B),無需考慮設(shè)計凸,凹模的間隙。A,Π形B,V形C,U形
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簡介:外文原文ABSTRACTDIEDESIGNINGISADEMANDINGANDHARDWORK.TODESIGNASEPARATEDIEFOREACHPRODUCTISTIMECONSUMINGANDEXPENSIVETASK.THISPAPERPRESENTSANIDEAOFSETSOFSTANDARDREFERENCEDIES.ITGIVESACONCEPTOFFLEXIBLEDIEDESIGNINGUSINGAREFERENCESTANDARDDIEDESIGNEDINAPOPULARCOMMERCIALCAD/CAMSOFTWAREPRO/ENGINEER.RATHERTHANDESIGNINGASEPARATEDIEFOREACHPART,JUSTUPDATETHEDIEDESIGNBYSELECTINGTHEDIEDIMENSIONSASREQUIRED.THEUSEOFTHISCONCEPTWILLPROVETOREDUCETIMEANDCOSTOFPRODUCTINMANUFACTURINGINDUSTRY.KEYWORDSDIE;FLEXIBLEDIEDESIGNINGSYSTEM;STANDARDIZATION;PRO/E;SECONDARYDEVELOPMENTATPRESENT,THEINDUSTRIALDEVELOPEDCOUNTRIESANDREGIONSINTHEMOLDINDUSTRYHASBEENGRADUALLYSTANDARDIZEANDSERIALIZATIONINCHINA,ALTHOUGHTHEMAJORITYDIEWITHINTHEENTERPRISESHAVEBUSINESSSTANDARDS,BUTGENERALLYNOTHIGHDEGREEOFSTANDARDIZATION,STANDARDIZATIONOFSTAMPINGDIEINTHEDIELIMITEDPARTSOFTHEPARTSTOACHIEVEREALSAVINGSSTAMPINGDIEDESIGNTIMEANDSHORTENTHEPROCESSINGCYCLE,COSTSAVINGS,REDUCEDESIGNANDMANUFACTURINGSTAFFWORKLOADPURPOSES,ITNEEDSTODEVELOPAFLEXIBLESTAMPINGDIEDESIGNSYSTEMATTHESAMETIME,STAMPINGDIESERIALIZATIONOFTHESCOPEOFSTANDARDIZATIONANDCANNOTBECONFINEDTODIEPARTOFTHEFIXEDPANELS,BOARDS,THETOPPLATEUNLOADINGDEVICECOMMONLYUSEDCOMPONENTSSUCHASSTAMPINGOREVENDIESTRUCTURE,WESHOULDACHIEVESERIALIZATIONANDSTANDARDIZATIONASCAD/CAMTECHNOLOGYINTHEDESIGNANDMANUFACTUREDIEINTHECOURSEOFEXTENSIVEAPPLICATION,ITSHOULDFIRSTBESTANDARDIZEDSTAMPINGDIEFROMTHECADSYSTEMBEGANSOMELARGESCALECOMMERCIALIZATIONOFTHECAD/CAMSOFTWARE,SUCHASPRO/E,UG,ANDSOONHAVEDEVELOPEDASPECIALIZEDINJECTIONMOLDDESIGNPACKAGEANDSTAMPINGDIEDESIGNFORTHESPECIALSOFTWARE,USERSNEEDTOBEDEVELOPEDLTHEAPPLICATIONTOOLSPRO/EINSTAMPINGDIEDESIGNFLEXIBILITYINTHESYSTEMDEVELOPMENTPRO/ENGINEERBYTHEUNITEDSTATESHASDEVELOPEDASETOFPTCCAD/CAM/CAESOFTWAREPRO/EUSINGASINGLEDATABASEANDFEATUREBASED,THEDESIGNPARAMETERSOFTHEMODEL,PROVIDESUSERSWITH1THEDEVELOPMENTISVERYCONVENIENTFORSTAMPINGDIEFLEXIBLESYSTEMOFTOOLSJUICE11FAMILYTABLEFANAILYFABLEKNOWNASTHEFAMILYTABLE,THESTRUCTUREUSEDTOCREATETHESAMEORSIMILARPARTSOFTHESIZEANDCHARACTERISTICSOFTHESTANDARDIZEDDATABASETABLES,ISDEVOTEDTOTHEESTABLISHMENTOFASTANDARDPARTSLIBRARYTOOLTHEUSEOFTHEFORMERPARTSRELATIONSBETWEENTHEASSEMBLYANDPARTSASSEMBLYINTHEPRESENCEOFMIDDLEANUMBEROFFEATURES13PRO/PROGRAMPRO/PROGRAMPROGRAMISTHEPRO/EOFAPROCEDURALTOOL,SIMILARTOITSGRAMMARVBAANDOFFICESOFTWAREINTHEMACROACERWHENUSERSUSEOFPRO/ENGINEERTODESIGNTHEPRODUCTOFVARIOUSKINDSOFINFORMATIONTODOCUMENTTHEFORMATWILLBERECORDEDTHROUGHTHEPRO/PROGRANDOCUMENTEDITING,CANBEACHIEVEDONTHECHARACTERISTICSOFTHEHIDE,DELETEANDREORDERTHEASSEMBLYOFCOMPONENTSTOADDANDREPLACEMENTOPERATIONTHESEFEATURESSTAMPINGDIESFORTHEESTABLISHMENTOFSTANDARDPARTSLIBRARY,STANDARDSANDFLEXIBLEDESIGNSTRUCTUREOFTHESYSTEMISVERYUSEFULPROGRAMFILESINTHESTRUCTURECANBEBROADLYCLASSIFIEDINTOTHETITLE,SETOFPARAMETERSRELATIONSHIP,TOADDFEATURESPARTSANDUPDATINGTHEQUALITYATTRIBUTES,SUCHASFIVEPARTSIN“INPUTENDINPUT“XIAOLOCATEDBETWEENTHEPARAMETERSOFTHE“RE1ATIONSENDREALATIONS“RELATIONSBETWEENTHEVARIOUSADDINTHE“ADDENDADD“ANDADDEDFEATURESPARTMODULEORPARTSASSEMBLYMODULEPRO/PROGRAMPROVIDESTHREETYPESOFPARAMETERSNUMBERNUMERICALSTRINGSTRINGANDYESNOIT2STANDARDSMOLDBASEOFTHEDEVELOPMENT21STANDARDSMOLDBASECLASSIFICATIONANDORGANIZATIONSDIESTAMPINGDIEISANIMPORTANTPARTTHETYPICALMODELTHEREARETHREETYPESREARGUIDEDMODEBACKPILLARSETS,THEMIDDLEGUIDEDMODECENTERPILLARSETSANDTHEGUIDEDMODEANGLEDIAGONALPILLARSETSEACHTYPEOFDIEALSOINCLUDESAVARIETYOFSPECIFICATIONSACCORDINGTODIEBOUNDARYDEMARCATIONSIZE,REARGUIDED,INALB22SPECIFICATIONS,D0SPECIFICATIONS6LB,MIDDLEGUIDED,INTHENINED0SPECIFICATIONS,THEGUIDEDMODEKOKLBSPECIFICATIONS723INORDERTOFACILITATETHEMANAGEMENTANDDATACALLS,THESTANDARDMODEOFTHEDIRECTORYOFTHEBESTESTABLISHEDINTHEPRO/EINSTALLATIONDIRECTORYASTHREECATEGORIESTHELARGERSTRUCTURALDIFFERENCES,ITMAYDIETHEROOTOFTHEESTABLISHMENTOFTHREEOTHERSUBDIRECTORIES,EACHSUBDIRECTORYCONTAINSALLTHECOMPONENTPARTSMODE,ANDEACHTYPEOFPARTSCANBEADOPTEDPRO/ESOFTWAREFORTHEFAMILYTABLE,ANDTOOLS
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簡介:學(xué)校代碼10410序號050659本科畢業(yè)設(shè)計題目題目燈座注塑模具的設(shè)計學(xué)院院工學(xué)院姓名名學(xué)號號專業(yè)業(yè)農(nóng)業(yè)機(jī)械化及自動化年級級05級指導(dǎo)教師指導(dǎo)教師二OO九年九年五月五月INJECTIONMOLDOFLAMPHOLDERABSTRACTWORLDWIDECOMPETITIONISBECOMINGINCREASINGLYFIERCELYAMONGMANUFACTURINGINDUSTRYPROVIDINGINDIVIDUALIZEDPRODUCTFORCUSTOMERSWITHHIGHEFFICIENCY,LOWCONSUMPTIONANDHIGHQUALITY,HASBECOMEANIMPORTANTSYMBOLOFCOMPETITIVENESSFORAMODERNENTERPRISEMOULDHASBEENKNOWNAS“THEFATHEROFINDUSTRIAL”THEQUALITYOFMOULD,WILLDIRECTLYAFFECTTHEQUALITYOFPRODUCTS,PRODUCTION,COST,PRODUCTIONOFNEWPRODUCTSANDPRODUCTREPLACEMENTCYCLEOFOLD,THEPACEOFSTRUCTURALADJUSTMENTENTERPRISEPRODUCTSANDMARKETCOMPETITIVENESSANDECONOMICSITUATIONTHEQUALITYOFTHEMOLUDTHEEVERINCREASINGDEMANDSWITHTHEDEVELOPMENTOFPLASTICSINDUSTRY,PLASTICMOULDTISDEVELOPINGMOREANDMORERAPIDLYINRECENTYEARS,THEDEMANDSOFPEOPLEFORALLKINDSOFEQUIPMENTSANDSUPPLIESLIGHTWEIGHTANDBEAUTIFULANDTHEDEMANDOFFEELISBECOMINGHIGHERANDHIGHER,WHICHPROVIDESABROADERMARKETFORTHEPLASTICPRODUCTSTHEDEVELOPMENTOFPLASTICMOULD,ITISNECESSARYTOFOLLOWTHEDEVELOPMENTOFPLASTICPRODUCTSPLASTICMOLDISDEVELOPINGINCREASINGLYTODAY,NODOUBTINJECTIONMOULDPLASTICMOULDHASBECOMETHEREPRESENTATIVEOFTHEDEVELOPMENTOFADVANCED,INTHEPLASTICMOULDTOOCCUPYTHECORESTATUSTHISDESIGNISAPLASTICINJECTIONMOLDFORAPLASTICPRODUCTOFLAMPHOLDERASETOFMOULDWITHONEMODULEANDFOURCAVITIESHASBEENDESIGNEDTHROUGHACOMPREHENSIVEANALYSISOFTHESTRUCTUREANDPROPERTIESADETAILEDDESCRIPTIONOFMOLDINGPARTANDTECHNOLOGICALPROCESS,THESELECTIONOFTECHNOLOGICALPARAMETERSANDCALCULATIONOFTHEIMPORTANTPARTATTHESAMETIME,ADESIGNFORITSMOLDINGPART,INJECTIONSYSTEM,REJECTINGMECHANISMOFINJECTIONMOLDANDOTHERMAKEUPOFTHEMOULD,ASWELLASTHEWORKINGPROCESSOFTHEMOULD,WERESPECIFIEDINDETAILKEYWORDSMANUFACTURINGINDUSTRY、MOULD、PLASTICPRODUCTS、INJECTIONMOLD、PLASTICMOLDING、INJECTIONMOLD、PLASTICPRODUCTOFLAMPHOLDER/LAMPBASE、MOLDINGPART、TECHNOLOGICALPROCESS、INJECTIONSYSTEM、REJECTINGMECHANISMOFINJECTIONMOLD、
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