ABS塑件的注射成型工艺分析及模具设计外文翻译.docx
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ABS塑件的注射成型工艺分析及模具设计外文翻译
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Treatingandthemodernmouldmakehighspeed
One,summarizes
1thepresentsituationthatthemouldmakesatpresentandtrend
Themouldisimportanthandicraftequipment,occupiesdecisivepositioninindustriddepartmentssuchasconsumergoods,electricalequipmentelectron,automobile,aircraftfabrication.Themouldisimportanthandicraftequipment,occupiesdecisivepositioninindustriddepartmentssuchasconsumergoods,electricalequipmentelectron,automobile,aircraftfabrication.Industrialproductpartroughprocess75%,thefinishmachining50%andplasticpart90%willbecompletedfromthemould.TheChinesemouldmarketdemandalreadyreachesscaleof500hundredmillionyuanatpresent.Theautomobilemould,theannualgrowthratecoveringpieceofmouldespeciallywillexceed20%;Alsopromptbuildingmaterialmoulddevelopment,variousheterotypematerialthemould,wallsurfaceandfloormouldbecomenewmouldgrowthpoint,plasticdoorsandwindowsandplasticdrain-pipeincreasetoexceeding30byintheupcomingseveralyears%;Thehomeappliancemouldannualgrowthratewillexceed10%;TheITindustryyearincreases%speedequallyexceeding20,theneedtothemouldaccountsfor20ofmouldmarketplace%.2004annualChinesemachinetoolsimplementsindustryoutputvalue
willcontinuetoincrease.Ourcountrymouldfabricationmarketpotentialisenormous.Thebasisdatacounts,inrecentyears,ourcountrymouldyeargrossoutputvaluereaches3billionU.S.dollar,entranceexceeds1billionU.S.dollar,exceed100millionU.S.dollaroutlet.Increasebyfrom25%toincreaseto200550%of1995.Theexpertforetellsthatabroad:
Asiaportionbeingoccupiedbyinmouldfabricationinthewholeworld,willfrom25%toincreaseto200550%of1995.
Chinesemouldindustryhasbeenexpandingbyleapsandbounds,hasformedeastChinaandtwobigSouthChinabases,andhasexpandedgraduallyarrivingatotherprovince.In2002(Shandong,Anhui,Sichuan)in1996~,mouldmanufacturingindustryoutputvalueannualaveragegrowth14%,growsby25%in2003.In2003ourcountrymouldoutputvalueis45billionRMB.Thegrossproductplaceoccupiestheworldthe3rd,exportsamouldincreases33.5%comparedtolastyear336,800,000U.S.dollar.But,contentslowourcountrytechnologymouldsalreadypileupinexcessofrequirement,verymostsupportofaccurate,complicatedtopgrademouldimports.Everyyeartheentrancemouldexceeds1billionU.S.dollar.Exceed100millionU.S.dollaroutlet.Precisemouldaccuracyrequiresthat3mums,large-scalemouldsrequirethat8000satisfiedkNagreewellwithmodelforceinjectionmachinerequestin2~;Theminitypemouldneedstherequestsatisfyingthediameter1mmsilentstocktube.Atpresent,adoptquick-cuttingtoproduceamouldalreadybecomingthegeneraltrendthatthemouldmakes,afewmouldshaveproducedamanufacturerinabroad,high-speedmachinetoollargeareahassubstitutedtheelectricsparkmachinetool,quick-cuttinghasimprovedthemouldefficacygreatly.Machinetoolenterpriseaimsatmouldmanufacturingenterprises,sometreatingcentres60%allaboveofthemachinetoolproducingafactorysellstreatingenterprisetoamould.Themouldfabricationenterprisesubstitutingtheelectricsparkfinishmachiningmouldgraduallyinabroadhasadoptquick-cuttingalreadycommonly,quick-cuttinghasproducedamouldalreadybecomingthegeneraltrendthatthemouldmakesgradually,hasimprovedthemouldefficacyandmassgreatly.Adoptquick-cuttingtoreplaceelectricsparkproducingamould,cangetonthestickobviously,improvesmouldaccuracy,lifetimegrowing.
2highspeedprocessesapplicationinmakinginthemould
2.1quick-cuttingmerit:
1)cutterhighrotationrateandthemachinetoolheightenterbegiventoandhighacceleration,improvemetalexcisionrategreatly;
2)quick-cuttingdiminutionscutaforce;
3)quick-cuttingheatmajorpartgenerateheatfromthecuttingsentrainment,workpiecebeingshort;
4)quick-cuttingcutdownvibration,improvetreatingmass;
2.2highspeedtreatingapplytothebeneficialresultthatthemouldprocesses
1)fleetnessroughprocessandhalffinishmachining,improvetreatingefficiency;
2)highspeedhigh-accuracyfinishmachiningreplaceonlyentiretheheightprocessing,indicatingmass,formaccuracyrise,50%,cutsdownrepairamillbyhandthanEDMprocessesapotentiation;
3)cutsthesurfaceprocessingfinalmoldingstiffly,improvesurfacemass,formaccuracy,thetreating(notonlybeingthatsurfaceharshnessislow,andthesurfaceradianceishigh),beingusedforcomplicatedsurfacehasmoreadvantage;
4)thesurfacelossthatEDMtreatingproduces,improvemouldlife-span20%;
5)processesanelectroderapidlycombiningwiththeCAD/CAMtechnology,especially,theformiscomplicated,thin-wallissimilartoanelectrode.
3adoptquick-cuttingtoprocessamouldneedingtheproblemsolving
Ininthehomeland,sincetheaspectcausesuchasfund,technology,thequick-cuttingapplyingproduceamouldbeintheinitialstagestage.Returnthemachinetool,cutter,handicraftbacktoexistenceaswellassomeproblemofaspectneedstoproceedorderlyothersolve.
Theshortcomingisthatfinishedcostishigh,correctcuttersigmatismhavecomparativelyhighdemand,cannothaveusedbigcutters,needtohavethecomplicatedcomputerprogrammingtechnologytobeusedforsupport,equipmentrunningcostheight.
Two,thehighspeedprocessingamould'sprocessesamachinetool
Mouldfinishmachiningandhardcuttingtreatingrequirethatthenumericalcontrolhigh-speedmachinetool,formboard,modelputuptheprecisionprocessingneed,high-effectnumericalcontrolmachinetooletc.Themouldaimingatproducesalotofmachinetoolenterprise,sometreatingcentres60%allaboveofthemachinetoolproducingafactorysellsenterprisetoamould.
Thefixedassetshaving5billionyuanwithoutexceptionintheupcomingseveralyearsthrowsintomouldindustry,80%isthemachinetoolbuyingamouldprocessequipment,justsayingeveryyearhaving4billionyuanofRMBtobuyJinqieamongthem.
Atpresentaverageourcountrynumericalcontrolmachinetoolutilizationratioapproximately20%,thehigh-speedmachinetoolutilizationratio3~5%.Also,mouldenterprisehastheunitsuitabletobuyahigh-speedmachinetool,complieswith6000~40000rmp'stohave.
1high-speedmachinetooltechnologyparameterdemands
Processcentrechiefaxishigh-power,highrotationrate,satisfiedrudefinishmachining;Thefinishmachiningmouldwantstoneedtoreach15000~20000rmplikethecutter,themachinetoolwithminordiameter.Generally,thechiefaxisrotationratemachinetoolunder10000rpmcancarryoutroughprocessandhalffinishmachining,cannotreachthefinishmachiningaccuracy;
Havenowaytoreach400theabovem/mincuttingspeed.
2fivescrollsofmachinetoolsapplicationincreasesatrend
1)treatingrouteisnimble,thesurfaceformiscomplicated;
2)treatingrangeisbig,thevarioustypemouldsuitableprocesses;
3)cutslife-spanofconditioneasytocutdowncutterwear,toraiseacutter,;
3thesoftwaresbuyingCAD/CAMandhigh-speedmachinetoolsassort
Onthegroundsofthemachinetool,majorpartcounting,havingseveralbillionsU.S.dollartobeusedtoenterporteveryyear,theelectromachiningmachinetoolandthehigh-speedmachinetoolneedtoimport.Three,quick-cuttingmouldcuttertechnology
Quick-cuttingprocessesthecutterneedingallocatingproperquick-cutting.Progressingprocessingcuttermaterial'sinhighspeedhasurgeddevelopmentofhighspeedtreating.Thecutter,knifeedgeheadquarterandhightenacitybasegatheringcrystalstrengtheningtheceramicscutterbeingabletobeusedgivingconsiderationtohighhardnessexperienceandobservecarbidealloycoatingbecomingpossibility.Gatherthecrystalcubenitridingboron(PCBN)bit,whosehardnessmayamountto3500~4500HV.Gathercrystalmiamond(PCD)it'shardnessbutamountto6000~10000HV.GermanySCS,JapanMitsubishi(magicalsteel)andSumitomo,
SwitzerlandShanteweike,USAKennaareinrecentyearsswiftlylargewaitforthefamousabroadcuttercompanytosuccessivelyhavedebutedtherespectivequick-cuttingcutter,notonlycutterhavingaveragestructuralsteelofquick-cutting,theceramicscutterstillhavingdirectquick-cuttingofenergyquenchinghardsteeliswaitingforaneffecttosurpassthehardcutter,especiallythecoatingcutterappearsallofasudden,bringingintoplayinquenchinghalffinishmachiningandfinishmachiningofhardsteel.Newcuttermaterialandcuttertechnologyappearingalreadymakethebottleneckproblemthathighspeedhasprocessednolongerbeabletoappearonthecutter.
But,expensiveentrancecutterpricealsoblocksquick-cuttingmouldkeyfactor.
Abovetocometosayingthecutterandthecutterholderaccelerationreach3gsthesort,thecuttercircularrunoutneedstobesmallerthan0.015mm,buttheknifelengthisunablegreaterthan4timescuttersdiameter.TherealityaccordingtoSANDVIKcompanyhascounted,thecarbidealloyhasstoodonintheentiretyusingcarbonnitridingtitanium(TICN)coatingwhenmilli