机械专业毕业设计外文翻译切削加工新概念Word文档格式.docx

机械专业毕业设计外文翻译切削加工新概念Word文档格式.docx

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Thenewconceptofcuttingprocessing

Thenowadayscuttingtoolcompanycannotonlybeagainthemanufactureandthesalescuttingtool,inordertosucceed,theymustbeconsistentwiththeglobalizationmanufacturetendencymaintenance,throughenhancestheefficiency,cooperateswiththecustomerreducesthecost.ApproachestheinstantaneousglobalcompetitionafterthisafterNAFTA,theWTOtime,theworldcompanyismakingquicklytothesamefeeling,islighter,acheaperresponse.Inotherwords,theymaketheproductandthecomponentscontaincaninhighspeedunderrevolve,asaresultofthecostpressure,best,islightermoreovermustmakecheaply.Obtainsthesegoalsabestwayisthroughdevelopsandappliesthenewmaterial,buttheseisnewandtheimprovementmaterialusuallyallwithdifficultyprocesses.Ininthiskindofcommercialpowerandthetechnicaldifficultycombinationisespeciallyprominentintheautomobileandtheaviationindustry,andhasbecomehastheexperiencethecuttingtoolcompanytoresearchanddevelopthedepartmentthemostimportantdrivinginfluence.

Forexample,takesthemodularcastirontosaythat,ithasbecometheenginepartandotherautomobiles,theagriculturethematerialwhichseedaybydaywiththeequipmentandinthemachinetoolindustrycomponents.Thiskindofalloyprovidesthelowproductioncostandthegoodmachinecapabilitycombination.Theyarecheaperthanthesteelproducts,buthasahigherintensityandtoughnesscomparedtothecastiron.Butatthesametimethemodularcastironisextremelywear-resisting,hasfastbreaksbyrubbingthecuttingtoolmaterialthetendency.Inthiswearresistantverygreatdegreebeadluminousbodycontentinfluence.Someknownmodularcastironbeadluminousbodycontenthigher,itsresistancetowearbetter,moreoveritsmachinabilityisworse.Moreover,themodularcastironporositycausesoffandontocut,thisevenmorereducesthelife.

Mayestimatethat,thehighdegreeofhardnessandthehighwear-resistingcuttingmaterialqualitymustconsiderthemodularcastironthehighresistancetowear.AndthematerialqualitycontainsextremelyhardTiCinfact（carbonizedtitanium）orTiCN（carbontitaniumnitrides）thickcoatingwhencuttingspeedeachminute300metersprocessesthemodularcastirontoproveusuallyiseffective.Butalongwithcuttingspeedincrease,scrap/Thecuttingtooljunctionplanetemperaturealsoisincreasing.Whenhassuchsituation,theTiCcoatingfavorsinhasthechemicalreactionwiththeironandsoftens,morepressuresfunctioninanti-crescentmoonhollowattritioncoating.Undertheseconditions,hopedhasonechemicalstabilitybettercoating,likeAl2O3（althoughunderlowspeedwasinferiortoTiChardoriswear-resisting）.

Thechemicalstabilitybecomesanimportantperformanceperformancedividinglinecomparedtotheresistancetowearthefactor,thespeedandthetemperatureisdecidedinisprocessedthemodularcastironthecrystalgrainstructureandtheperformance.ButusuallythickcoatingofTiCNandTiCoronlyductileironoxidesinthesoilcoatingisappliedto,becausethetodaymajorityofthiskindsareprocessedthematerialthecuttingspeedineachminute150to335metersbetween.Ishigherthaneachminute300meterapplicationsregardingthespeed,thepeopletothiskindofmaterialaresatisfied.

Inordertocausethisscopeperformancetobemostsuperior,themountainhighresearchedanddevelopedandhaspromotedinviewofmodularcastironprocessingmaterialqualityTX150.Thiskindofmaterialqualityhashardalsotheanti-distortionsubstrate,isveryidealregardingtheprocessingmodularcastiron.Itscoatingtheoxidecompoundcoatingwhichhollowlywearsbythickverywear-resistingcarbontitaniumnitridesandathinanti-crescentmoon,thetopisthinlayerTiN.Thiskindofcoatingwhichneedsthecenterwarmchemistrygasphasedepositionusingthestateoftheartproductionresistancetowearandtheanti-crescentmoonhollowattritionwhichtheCVDcoatingcompletedegreeofhardnessmoreoverthetoughsmoothnessincreases（MTCVD）thecraft.Substrate/Thecoatingcombinationperformancegivestheveryhighanti-plasticdeformationandthecuttingedgemicrocollapsestheability,causesittobecomeunderthenormalspeedtoprocessthemodularcastirontheidealmaterialquality.

Thecoatingceramicsalsodisplaycaneffectivelyprocessthemodularcastiron.Inthepast,thealuminumoxideceramicsapplicationwhichnotthecoatingtoughgoodsuchasnitridingsiliconandthesiliconcarbidetextilefiberstrengthenedtheworkpiecematerialchemistryparalysislimit.Todaybutcouldresistthescrapdistortionprocessthroughtheusetohavethehighthermalcoatingcuttingtoollifealreadyremarkablytoincrease.Butcertainearlythisdomainsworkpieceprocessingusealuminumoxidesspreadthelayercrystalstohavetostrengthentheceramics,todaymostresearchconcentrateintheTiNcoatingnitridingsilicon.Thiskindofcoatingcanremarkablyopenupthetoughgoodceramicstheapplicationscope.

Whenmachining,theworkpiecehasprocessedthesurfaceisdependsuponthecuttingtoolandtheworkpiecemakestherelativemotiontoobtain.Accordingtothesurfacemethodofformation,themachiningmaydivideintotheknifepointpathlaw,theformedcuttingtoollaw,thegeneratingprocessthreekinds.

Theknifepointpathlawisdependsupontheknifepointtobeoppositeintheworkpiecesurfacepath,obtainsthesuperficialgeometryshapewhichtheworkpiecerequests,liketheturningouterannulus,theshapingplane,thegrindingouterannulus,withtheprofileturningformingsurfaceandsoon,theknifepointpatharedecidedthecuttingtoolandtheworkpiecerelativemotionwhichprovidesintheenginebed;

Theformedcuttingtoollawabbreviationforming,iswiththeformedcuttingtoolwhichmatcheswiththeworkpiecefinalsuperficialoutline,ortheformedgrindingwheelandsoonprocessestheformedsurface,likeformedturning,formedmillingandformgrindingandsoon,becauseformsthecuttingtoolthemanufacturequitetobedifficult,thereforeonlyusesinprocessingtheshortformedsurfacegenerally;

Thegeneratingprocessnamerollscutsmethod,iswhentheprocessingthecuttingtoolandtheworkpiecedounfoldthemovementrelatively,thecuttingtoolandtheworkpiececentrodemakethepuretrundlemutually,betweenbothmaintainsthedefinitetransmissionratiorelations,obtainstheprocessingsurfaceistheknifeedgeinthiskindofmovementenvelope,inthegearprocessingrollsthetooth,thegearshaping,theshaving,thetophorizontaljadepiecetoothandrubsthetoothandsoontobethegeneratingprocessprocessing.Somemachininghasatthesametimetheknifepointpathlawandtheformedcuttingtoolmethodcharacteristic,likethreadturning.

Themachiningqualitymainlyisreferstotheworkpiecetheprocessingprecisionandthesurfacequality（includingsurfaceroughness,residualstressandsuperficialhardening）.Alongwiththetechnicalprogress,themachiningqualityenhancesunceasingly.The18thcenturylaterperiods,themachiningprecisioncountsbythemillimeter;

Atthebeginningof20thcentury,machiningprecisionGaoYida0.01millimeter;

Tothe50'

s,themachiningprecisionhasreachedamicronlevel;

The70'

s,themachiningprecisionenhancesto0.1micron.

Theinfluencemachiningqualityprimaryfactorhasaspectsandsoonenginebed,cuttingtool,jig,workpiecesemifinishedmaterials,techniqueandprocessingenvironment.Mustimprovethemachiningquality,musttakethesuitablemeasuretotheabovevariousaspects,likereducestheenginebedworkerror,selectsthecuttingtoolcorrectly,improvesthesemifinishedmaterialsquality,thereasonablearrangementcraft,theimprovementenvironmentalconditionandsoon.

Enhancesthecuttingspecificationstoenhancethematerialexcisionrate,isenhancesthemachiningefficiencytheessentialway.Thecommonlyusedhighlyeffectivemachiningmethodhasthehigh-speedcutting,theforcecutting,theplasmaarcheatingcutsandvibratesthecuttingandsoon.

Thegrindingspeediscalledthehigh-speedgrindingin45meters/secondabovecuttings.Usesthehigh-speedcutting（orgrinding）bothmayenhancetheefficiency,andmayreducethesurfaceroughness.Thehigh-speedcutting（orgrinding）requeststheenginebedtohavethehighspeed,thehighrigidity,thehighefficiencyandthevibration-proofgoodcraftsystem;

Requeststhecuttingtooltohavethereasonablegeometryparameterandtheconveniencetightway,butalsomustconsiderthesafereliablechipbreakingmethod.

Theforcecuttingreferstotheroughingfeedorcutsthedeepmachininggreatly,usesintheturningandthegrindinggenerally.Theforceturningmaincharacteristicisthelathetoolbesidesthemaincuttingedge,butalsosomeisparallelintheworkpiecehasprocessedsuperficialthevice-cuttingedgesimultaneouslytoparticipateinthecutting,thereforemayenhancetofeedquantitycomparedtothegeneralturningseveraltimesofevenseveraltimes.Compareswiththehigh-speedcutting,theforcecuttingcuttingtemperatureislow,thecuttingtoollifeislong,thecuttingefficiencyishigh;

Theshortcomingisprocessesthesurfacetoberough.Whenforcecutting,theradialdirectioncuttingforcedeathofaparentisnotsuitablefortoprocessthetallandslenderworkpieceverymuch.

Thevibrationcuttingisalongthecuttingtooldirectionoffeed,theattachmentlowfrequencyorthehighfrequencyvibrationmachining,mayenhancethecuttingefficiency.Thelowfrequencyvibrationcuttinghastheverygoodchipbreakinge