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外文翻译--高速铣削.doc

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外文翻译--高速铣削.doc

HighspeedmillingHighspeedmachiningisanadvancedmanufacturingtechnology,differentfromthetraditionalprocessingmethods.Thespindlespeed,cuttingfeedrate,cuttingasmallamountofunitswithinthetimeofremovalofmaterialhasincreasedthreetosixtimes.Withhighefficiency,highprecisionandhighqualitysurfaceasthebasiccharacteristicsoftheautomobileindustry,aerospace,moldmanufacturingandinstrumentationindustry,suchasaccesstoawiderangeofapplications,hasmadesignificanteconomicbenefits,isthecontemporaryimportanceofadvancedmanufacturingtechnology.Foralongtime,peopledieontheprocessinghasbeenusingagrindingormillingEDMEDMprocessing,grinding,polishingmethods.AlthoughthehighhardnessoftheEDMmachineparts,butthelowertheproductivityofitsapplicationislimited.Withthedevelopmentofhighspeedprocessingtechnology,usedtoreplacehighspeedcutting,grindingandpolishingprocesstodieprocessinghasbecomepossible.Toshortentheprocessingcycle,processingandreliablequalityassurance,lowerprocessingcosts.1OneoftheadvantagesofhighspeedmachiningHighspeedmachiningasadieefficientmanufacturing,highquality,lowpowerconsumptioninanadvancedmanufacturingtechnology.Inconventionalmachininginaseriesofproblemshasplaguedbyhighspeedmachiningoftheapplicationhavebeenresolved.1.1IncreaseproductivityHighspeedcuttingofthespindlespeed,feedratecomparedwithtraditionalmachining,inthenatureoftheleap,themetalremovalrateincreased30percentto40percent,cuttingforcereducedby30percent,thecuttingtoollifeincreasedby70.Hardenedpartscanbeprocessed,afixtureinmanypartstobecompletedrough,semifinishingandfine,andallotherprocesses,thecomplexcanreachpartsofthesurfacequalityrequirements,thusincreasingtheprocessingproductivityandcompetitivenessofproductsinthemarket.1.2ImproveprocessingaccuracyandsurfacequalityHighspeedmachinesgenerallyhavehighrigidityandprecision,andothercharacteristics,processing,cuttingthedepthofsmall,fastandfeed,cuttingforcelow,theworkpiecetoreduceheatdistortion,andhighprecisionmachining,surfaceroughnesssmall.Millingwillbenohighspeedprocessingandmillingmarksthesurfacesothatthepartsgreatlyenhancethequalityofthesurface.ProcessingAluminumwhenupRa0.40.6um,piecesofsteelprocessingatuptoRa0.20.4um.1.3CuttingreducetheheatBecausethemainaxismillingmachinehighspeedrotation,cuttingashallowcutting,andfeedveryquickly,andthebladelengthoftheworkpiececontactsandcontacttimeisveryshort,adecreaseofbladesandpartsoftheheatconduction.Highspeedcuttingbydrymillingoroilcookedupabsolutemistlubricationsystem,toavoidthetraditionalprocessingtoolincontactwiththeworkpieceandalotofshortcomingstoensurethatthetoolisnothightemperatureundertheconditionsofwork,extendedtoollife.1.4ThisisconducivetoprocessingthinwalledpartsHighspeedcuttingofsmallcuttingforce,ahigherdegreeofstability,Machinablewithhighqualityemployeescomparedtothecompanymaybeverygood,butotherthanthecompanysemployeesmaySuanbuLeoutstandingworkperformance.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,FurthermoreThiscanmorefullyconcentrateonthebusinessuseoflimitedresources.Identifybusinessmodels,andthentaketheenterpriseofthecorrespondingdepartmentsandstaffwiththebusinessmodelsforcomparison,thetwocanbefoundintheperformancegap,acomparativeanalysistofindreasons,inaccordancewiththisbusinessreality,thefinalidentificationoftrainingneeds.Thecostoftrainingisneeded,ifnotthroughaneffectivewaytodeterminewhethercompaniesneedtotrainandthetrainingoftheway,butblindtotraining,suchtrainingisdifficulttoachievethedesiredresults.Acomparisononlydifferencebetweenthismodelissimpleandpracticaltraining.1.5Canbepartofsomealternativetechnology,suchasEDM,grindinghighintensityandhighhardnessprocessingHighspeedcuttingamajorfeatureofhighspeedcuttingmachinehasthehardnessofHRC60parts.Withtheuseofcoatedcarbidecuttermoldprocessing,directlytotheinstallationofahardenedtoolsteelprocessingforming,effectivelyavoidtheinstallationofseveralpartsofthefixtureerrorandimprovethepartsofthegeometriclocationaccuracy.Inthemoldoftraditionalprocessing,heattreatmenthardeningoftheworkpiecerequiredEDM,highspeedmachiningreplacethetraditionalmethodofcuttingtheprocessing,manufacturingprocesspossibletoomitdieinEDM,simplifyingtheprocessingtechnologyandinvestmentcosts.HighspeedmillingintheprecinctsofCNCmachinetools,orforprocessingcentre,alsointheinstallationofhighspeedspindleonthegeneralmachinetools.Thelatternotonlyhastheprocessingcapacityofgeneralmachinetools,butalsoforhighspeedmilling,adecreaseofinvestmentinequipment,machinetoolsincreasedflexibility.Cuttinghighspeedprocessingcanimprovetheefficiency,qualityimprovement,streamlineprocesses,investmentandmachinetoolinvestmentandmaintenancecostsrise,butcomprehensive,cansignificantlyincreaseeconomicefficiency.2HighspeedmillingHighspeedmillingthemaintechnicalhighspeedcuttingtechnologyiscuttingthedevelopmentdirectionofoneofitwithCNCtechnology,microelectronictechnology,newmaterialsandnewtechnology,suchastechnologydevelopmenttoahigherlevel.Highspeedmachinetoolsandhighspeedtooltoachievehighspeedcuttingistheprerequisiteandbasicconditions,inhighspeedmachiningintheperformanceofhighspeedmachinetoolmaterialofchoiceandtherearestrictrequirements.2.1HighspeedmillingmachineinordertoachievehighspeedmachiningGeneraluseofhighlyflexiblehighspeedCNCmachinetools,machiningcenters,andsomeuseadedicatedhighspeedmilling,drilling.Atthesametimeahighspeedmachinetoolspindlesystemandhighspeedfeedingsystem,highstiffnessofthemaincharacteristicsofhighprecisiontargetingandhighprecisioninterpolationfunctions,especiallyhighprecisionarcinterpolationfunction.Highspeedmachiningsystemsofthemachineahigherdemand,mainlyinthefollowingareasGeneraluseofhighlyflexiblehighspeedCNCmachinetools,machiningcenters,andsomeuseadedicatedhighspeedmilling,drilling.Atthesametimeahighspeedmachinetoolspindlesystemandhighspeedfeedingsystem,highstiffnessofthemaincharacteristicsofhighprecisiontargetingandhighprecisioninterpolationfunctions,especiallyhighprecisionarcinterpolationfunction.Highspeedmachiningsystemsofthemachineahigherdemand,mainlyinthefollowingareasHighspeedmillingmachinemusthaveahighspeedspindle,thespindlespeedisgenerally10000100000m/min,powergreaterthan15kW.Butalsowithrapidspeedorindesignatedspotsfaststoppingperformance.Themainaxialspacenotmorethan0.0002mm.Oftenusinghighspeedspindlehydrostaticbearings,airpressurebearing,mixedceramicbearings,magneticbearingstructureoftheform.Spindlecoolinggeneralusewithinthewateroraircooled.Highspeedprocessingmachinedrivensystemshouldbeabletoprovide4060m/minofthefeedrate,withgoodaccelerationcharacteristics,canprovide0.4m/s2to10m/s2accelerationanddeceleration.Inordertoobtaingoodprocessingquality,highspeedcuttingmachinesmusthaveahighenoughstiffness.Machinebedmaterialusedgrayiron,canalsoaddahighdampingbaseofconcrete,topreventcuttingtoolchatteraffectthequalityofprocessing.Ahighspeeddatatransferrate,canautomaticallyincreaseslowdown.Processingtechnologytoimprovetheprocessingandcuttingtoollife.Atpresenthighspeedmachinetoolmanufacturers,usuallyinthegeneralmachinetoolsonlowspeed,thefeedoftheroughandthenproceedtoheattreatment,thelastinthehighspeedmachineonthehalffinishedandfinished,inimprovingtheaccuracyandefficiencyatthesametime,asfaraspossibletoreduceprocessingCost.2.2HighspeedmachiningtoolHighspeedmachiningtoolisthemostactiveoneoftheimportantfactors,ithasadirectimpactontheefficiencyofprocessing,manufacturingcostsandproductprocessingandaccuracy.Toolinhighspeedprocessingtobearhightemperature,highpressure,friction,shockandvibration,suchasloading,itshardnessandwearresistance,strengthandtoughness,heatresistance,technologyandeconomicperformanceofthebasichighspeedprocessingperformanceisthekeyOneofthefactors.Highspeedcuttingtooltechnologydevelopmentspeed,themoreapplicationssuchasdiamondPCD,cubicboronnitrideCBN,ceramicknives,carbidecoating,CtitaniumnitrideCarbideTICNAndsoon.CBNhashighhardness,abrasionresistanceandtheextremelygoodthermalconductivity,andirongroupelementsbetweenthegreatinertia,in1300℃wouldnothavehappenedsignificantroleinthechemical,alsohasagoodstability.TheexperimentsshowthatwithCBNcuttingtoolHRC3567hardnessofhardenedsteelcanachieveveryhighspeed.Ceramicshavegoodwearresistanceandthermalchemicalstability,itshardness,toughnessbelowtheCBN,canbeusedforprocessinghardnessofHRC50parts.CarbideToolgoodwearresistance,butthehardnessthanthelowCBNandceramics.Coatingtechnologyusedknives,cuttingtoolscanimprovehardnessandcuttingtherate,forcuttingHRC4050inhardnessbetweentheworkpiece.Canbeusedtoheatresistantalloys,titaniumalloys,hightemperaturealloy,castiron,Chungang,aluminumandcompositematerialsofhighspeedcuttingCut,themostwidelyused.Precisionmachiningnonferrousmetalsornonmetallicmaterials,orthechoiceofpolycrystallinediamondGangcoatedtool.2.3HighspeedprocessingtechnologyHighspeedcuttingtechnologyforhighspeedmachiningisthekey.CuttingMethodsmisconduct,willincreaseweartooltolessthanhighspeedprocessingpurposes.Onlyhighspeedmachinetoolandnotagoodguidetechnology,highspeedmachiningequipmentcannotfullyplayitsrole.Inhighspeedmachining,shouldbechosenwithmilling,whenthemillingcutterinvolvementwiththeworkpiecechipthicknessasthegreatest,andthengraduallydecreased.Highspeedmachiningsuitableforshallowdepthofcut,cuttingdepthofnotmorethan0.2mm,toavoidthelocationofdeviationtooltoensurethatthegeometricprecisionmachiningparts.Ensurethattheworkpieceonthecuttingconstantload,togetgoodprocessingquality.Cuttingasinglehighspeedmillingpathcuttingmode,trynottointerrupttheprocessandcuttingtoolpath,reducingtheinvolvementtooltocutthenumbertoberelativelystablecuttingprocess.Tooltoreducetherapidchangeto,inotherwordswhentheNCmachinetoolsmustceaseimmediately,orJiangsu,andthenimplementthenextstep.Asthemachinetoolaccelerationrestrictions,easyto

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