Highspeed milling高速铣削机械工程毕业设计英文文献及翻译.docx
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Highspeedmilling高速铣削机械工程毕业设计英文文献及翻译
High-speedmilling——高速铣削(机械工程毕业设计英文文献及翻译)
High-speedmilling——高速铣削
High-speedmachiningisanadvancedmanufacturingtechnology,differentfromthetraditionalprocessingmethods.Thespindlespeed,cuttingfeedrate,cuttingasmallamountofunitswithinthetimeofremovalofmaterialhasincreasedthreetosixtimes.Withhighefficiency,highprecisionandhighqualitysurfaceasthebasiccharacteristicsoftheautomobileindustry,aerospace,moldmanufacturingandinstrumentationindustry,suchasaccesstoawiderangeofapplications,hasmadesignificanteconomicbenefits,isthecontemporaryimportanceofadvancedmanufacturingtechnology.Foralongtime,peopledieontheprocessinghasbeenusingagrindingormillingEDM(EDM)processing,grinding,polishingmethods.AlthoughthehighhardnessoftheEDMmachineparts,butthelowertheproductivityofitsapplicationislimited.Withthedevelopmentofhigh-speedprocessingtechnology,usedtoreplacehigh-speedcutting,grindingandpolishingprocesstodieprocessinghasbecomepossible.Toshortentheprocessingcycle,processingandreliablequalityassurance,lowerprocessingcosts.
1Oneoftheadvantagesofhigh-speedmachining
High-speedmachiningasadie-efficientmanufacturing,high-quality,lowpowerconsumptioninanadvancedmanufacturingtechnology.Inconventionalmachininginaseriesofproblemshasplaguedbyhigh-speedmachiningoftheapplicationhavebeenresolved.
1.1Increaseproductivity
High-speedcuttingofthespindlespeed,feedratecomparedwithtraditionalmachining,inthenatureoftheleap,themetalremovalrateincreased30percentto40percent,cuttingforcereducedby30percent,thecuttingtoollifeincreasedby70%.Hardenedpartscanbeprocessed,afixtureinmanypartstobecompletedrough,semi-finishingandfine,andallotherprocesses,thecomplexcanreachpartsofthesurfacequalityrequirements,thusincreasingtheprocessingproductivityandcompetitivenessofproductsinthemarket.
1.2Improveprocessingaccuracyandsurfacequality
High-speedmachinesgenerallyhavehighrigidityandprecision,andothercharacteristics,processing,cuttingthedepthofsmall,fastandfeed,cuttingforcelow,
theworkpiecetoreduceheatdistortion,andhighprecisionmachining,surfaceroughnesssmall.Millingwillbenohigh-speedprocessingandmillingmarksthesurfacesothatthepartsgreatlyenhancethequalityofthesurface.ProcessingAluminumwhenupRa0.40.6um,piecesofsteelprocessingatuptoRa0.2~0.4um.1.3Cuttingreducetheheat
Becausethemainaxismillingmachinehigh-speedrotation,cuttingashallowcutting,andfeedveryquickly,andthebladelengthoftheworkpiececontactsandcontacttimeisveryshort,adecreaseofbladesandpartsoftheheatconduction.High-speedcuttingbydrymillingoroilcookedupabsolute(mist)lubricationsystem,toavoidthetraditionalprocessingtoolincontactwiththeworkpieceandalotofshortcomingstoensurethatthetoolisnothightemperatureundertheconditionsofwork,extendedtoollife.
1.4Thisisconducivetoprocessingthin-walledparts
High-speedcuttingofsmallcuttingforce,ahigherdegreeofstability,Machinablewithhigh-qualityemployeescomparedtothecompanymaybeverygood,butotherthanthecompany'semployeesmaySuanbuLeoutstandingworkperformance.ForourChinapractice,weusethemodelstodeterminethemethodofstafftrainingneedsaresimpleandeffective.Thisstudymodelscanbeanexternalobject,itcanalsobeacombinationofinternalandexternal.Wemustfirstclearstrategyforthedevelopmentofenterprises.Throughtheinternalandexternalbusinessenvironmentandorganizationalresources,suchasanalysis,thefuturedevelopmentofaclearbusinessgoalsandoperationalpriorities.Accordingtothebusinessdevelopmentstrategycanbecomparedtofindthebusinessmodels,throughacomparativeanalysisofthefinalizationofbusinessmodels.Indeterminingbusinessmodels,a,istheunderstandingofitsdevelopmentstrategy,oritsmarketshareandmarketgrowthrate,orthestaffofthesituation,andsoon,accordingtothecompaniestodeterminetheactualsituation.Asenterprisesindifferentperiodofdevelopment,itsfocusisdifferent,whichmeansthatenterprisesneedtoinvestthemanpowerandfinancialresourcesthefocusisdifferent.Soinacertainperiodoftime,enterprisesshouldaccuratelyselectedtheirbusinessmodelscomparedwiththedepartmentsandposts,somorepracticalsignificance,becausethebusinessmodelsarenotalwaysgood,buttocomparesomeaspectsdidnothavemuchpracticalsignificance,FurthermoreThis
canmorefullyconcentrateonthebusinessuseoflimitedresources.Identifybusinessmodels,andthentaketheenterpriseofthecorrespondingdepartmentsandstaffwiththebusinessmodelsforcomparison,thetwocanbefoundintheperformancegap,acomparativeanalysistofindreasons,inaccordancewiththisbusinessreality,thefinalidentificationoftrainingneeds.Thecostoftrainingisneeded,ifnotthroughaneffectivewaytodeterminewhethercompaniesneedtotrainandthetrainingoftheway,butblindtotraining,suchtrainingisdifficulttoachievethedesiredresults.Acomparisononlydifferencebetweenthismodelissimpleandpracticaltraining.1.5Canbepartofsomealternativetechnology,suchasEDM,grindinghighintensityandhighhardnessprocessing
High-speedcuttingamajorfeatureofhigh-speedcuttingmachinehasthehardnessofHRC60parts.Withtheuseofcoatedcarbidecuttermoldprocessing,directlytotheinstallationofahardenedtoolsteelprocessingforming,effectivelyavoidtheinstallationofseveralpartsofthefixtureerrorandimprovethepartsofthegeometriclocationaccuracy.Inthemoldoftraditionalprocessing,heattreatmenthardeningoftheworkpiecerequiredEDM,high-speedmachiningreplacethetraditionalmethodofcuttingtheprocessing,manufacturingprocesspossibletoomitdieinEDM,simplifyingtheprocessingtechnologyandinvestmentcosts.
High-speedmillingintheprecinctsofCNCmachinetools,orforprocessingcentre,alsointheinstallationofhigh-speedspindleonthegeneralmachinetools.Thelatternotonlyhastheprocessingcapacityofgeneralmachinetools,butalsoforhigh-speedmilling,adecreaseofinvestmentinequipment,machinetoolsincreasedflexibility.Cuttinghigh-speedprocessingcanimprovetheefficiency,qualityimprovement,streamlineprocesses,investmentandmachinetoolinvestmentandmaintenancecostsrise,butcomprehensive,cansignificantlyincreaseeconomicefficiency.
2High-speedmilling
High-speedmillingthemaintechnicalhigh-speedcuttingtechnologyiscuttingthedevelopmentdirectionofoneofitwithCNCtechnology,microelectronictechnology,newmaterialsandnewtechnology,suchastechnologydevelopmenttoahigherlevel.High-speedmachinetoolsandhigh-speedtooltoachievehigh-speedcuttingistheprerequisiteandbasicconditions,inhigh-speedmachiningintheperformanceof
high-speedmachinetoolmaterialofchoiceandtherearestrictrequirements.2.1High-speedmillingmachineinordertoachievehigh-speedmachiningGeneraluseofhighlyflexiblehigh-speedCNCmachinetools,machiningcenters,andsomeuseadedicatedhigh-speedmilling,drilling.Atthesametimeahigh-speedmachinetoolspindlesystemandhigh-speedfeedingsystem,highstiffnessofthemaincharacteristicsofhigh-precisiontargetingandhigh-precisioninterpolationfunctions,especiallyhigh-precisionarcinterpolationfunction.High-speedmachiningsystemsofthemachineahigherdemand,mainlyinthefollowingareas:
Generaluseofhighlyflexiblehigh-speedCNCmachinetools,machiningcenters,andsomeuseadedicatedhigh-speedmilling,drilling.Atthesametimeahigh-speedmachinetoolspindlesystemandhigh-speedfeedingsystem,highstiffnessofthemaincharacteristicsofhigh-precisiontargetingandhigh-precisioninterpolationfunctions,especiallyhigh-precisionarcinterpolationfunction.High-speedmachiningsystemsofthemachineahigherdemand,mainlyinthefollowingareas:
High-speedmillingmachinemusthaveahigh-speedspindle,thespindlespeedisgenerally10000~100000m/min,powergreaterthan15kW.Butalsowithrapidspeedorindesignatedspotsfast-stoppingperformance.Themainaxialspacenotmorethan0.0002mm.Oftenusinghigh-speedspindle-hydrostaticbearings,airpressure-bearing,mixedceramicbearings,magneticbearingstructureoftheform.Spindlecoolinggeneralusewithinthewateroraircooled.
High-speedprocessingmachine-drivensystemshouldbeabletoprovide40~60m/minofthefeedrate,withgoodaccelerationcharacteristics,canprovide0.4m/s2to10m/s2accelerationanddeceleration.Inordertoobtaingoodprocessingquality,high-speedcuttingmachinesmusthaveahighenoughstiffness.Machinebedmaterialusedgrayiron,canalsoaddahigh-dampingbaseofconcrete,topreventcuttingtoolchatteraffectthequalityofprocessing.Ahigh-speeddatatransferrate,canautomaticallyincreaseslowdown.Processingtechnologytoimprovetheprocessingandcuttingtoollife.Atpresenthigh-speedmachinetoolmanufacturers,usuallyinthegeneralmachinetoolsonlowspeed,thefeedoftheroughandthenproceedtoheattreatment,thelastinthehigh-speedmachineonthehalf-finishedandfinished,inimprovingtheaccuracyandefficiencyatthesametime,asfaraspossibletoreduceprocessingCost.
2.2High-speedmachiningtool
High-speedmachiningtoolisthemostactiveoneoftheimportantfactors,ithasadirectimpactontheefficiencyofprocessing,manufacturingcostsan