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外文翻译--加工介绍 英文版.pdf

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外文翻译--加工介绍 英文版.pdf

172008.12newsmechanicalEnglisharticleIntroductionofMachiningHoskins,JosiahAbstractMachinerymanufacturingindustryontheworldeconomyplaysanimportantrole,andthemachiningprocessistheestablishmentofmachinerymanufacturingtechnologyandanimportantpartofthecriticalwork.Inthispaper,theoutputshaftisafixtureoftheprocessingtechnologyanddesign,focusedonseveralimportantprocessingonthesurfaceofacertainsize,shape,locationrequirements,therearestillsomestrength,surfaceroughness,andotherrequirements,butthesewillbereflectedinthetext.Keywordsmanufacturingoutputshaftprocessingtechnologyfixture.Haveashapeasaprocessingmethod,allmachiningprocessfortheproductionofthemostcommonlyusedandmostimportantmethod.Machiningprocessisaprocessgeneratedshape,inthisprocess,Driversdeviceontheworkpiecematerialtobeintheformofchipremoval.Althoughinsomeoccasions,theworkpieceundernocircumstances,theuseofmobileequipmenttotheprocessing,However,themajorityofthemachiningisnotonlysupportingtheworkpiecealsosupportingtoolsandequipmenttocomplete.Machiningknowtheprocesshastwoaspects.Smallgroupoflowcostproduction.Forcasting,forgingandmachiningpressure,everyproductionofaspecificshapeoftheworkpiece,evenaspareparts,almosthavetospendthehighcostofprocessing.Weldingtorelyontheshapeofthestructure,toalargeextent,dependoneffectiveintheformofrawmaterials.Ingeneral,throughtheuseofexpensiveequipmentandwithoutspecialprocessingconditions,canbealmostanytypeofrawmaterials,mechanicalprocessingtoconverttherawmaterialsprocessedintothearbitraryshapeofthestructure,aslongastheexternaldimensionslargeenough,itispossible.Becauseofaproductionofspareparts,evenwhenthepartsandstructureoftheproductionbatchsizesaresuitablefortheoriginalcasting,Forgingorpressureprocessingtoproduce,butusuallyprefermachining.Strictprecisionandgoodsurfacefinish,Machiningthesecondpurposeistheestablishmentofthehighprecisionandsurfacefinishpossibleonthebasisof.Manyparts,ifanyothermeansofproductionbelongingtothelargescaleproduction,WellMachiningisalowtoleranceandcan182008.12newsmechanicalEnglisharticlemeettherequirementsofsmallbatchproduction.Besides,manypartsontheproductionandprocessingofcoarseprocesstoimproveitsgeneralshapeofthesurface.Itisonlynecessaryprecisionandchooseonlythesurfacemachining.Forinstance,thread,inadditiontomechanicalprocessing,almostnootherprocessingmethodforprocessing.Anotherexampleistheblacksmithpieceskeyholeprocessing,aswellastrainingtobeconductedimmediatelyafterthemechanicalcompletionoftheprocessing.PrimaryCuttingParametersCuttingtheworkpieceandtoolbasedonthebasicrelationshipbetweenthefollowingfourelementstofullydescribethetoolgeometry,cuttingspeed,feedrate,depthandpenetrationofacuttingtool.CuttingToolsmustbeofasuitablematerialtomanufacture,itmustbestrong,tough,hardandwearresistant.Toolgeometrytothetipplaneandcutteranglecharacteristicsforeachcuttingprocessmustbecorrect.Cuttingspeedisthecuttingedgeofworkpiecesurfacerate,itisinchesperminutetoshow.Inordertoeffectivelyprocessing,andcuttingspeedmustadapttothelevelofspecificpartswithknives.Generally,themorehardworkpiecematerial,thelowertherate.ProgressiveTooltospeediscutintotheworkpiecespeed.Iftheworkpieceortoolforrotatingmovement,feedrateperroundoverthenumberofinchestothemeasurement.Whentheworkpieceortoolforreciprocatingmovementandfeedrateoneachtripthroughthemeasurementofinches.Generally,inotherconditions,feedrateandcuttingspeedisinverselyproportionalto。Depthofpenetrationofacuttingtooltoinchesdollars–isthetooltotheworkpiecedistance.Rotarycuttingittothechiporequaltothewidthofthelinearcuttingchipthickness.Roughthanfinishing,deeperpenetrationofacuttingtooldepth.WearsofCuttingToolWealreadyhavebeenprocessedandtherattleofthecountlesscracksedgetool,welearnthattoolweararebasicallythreeformsflankwear,theformerflankwearandVNotchwear.Flankwearoccurredinboththemainbladeoccurredviceblade.Onthemainblade,shoulderremovedbecausemostmetalchipmandate,which192008.12newsmechanicalEnglisharticleresultedinanincreasecuttingforceandcuttingtemperatureincrease,Ifnotallowedtocheck,Thatcouldleadtotheworkpieceandthetoolvibrationandprovideforefficientcuttingconditionsmaynolongerexist.Vicebladedon,itisdeterminedworkpiecedimensionsandsurfacefinish.Flankwearsizeofthepossiblefailureoftheproductandsurfacefinisharealsoinferior.Inmostactualcuttingconditions,astheprincipalintheformerfirstdeputyflankbeforeflankwear,weararrivalenough,Toolwillbeeffective,theresultsaremadeunqualifiedparts.AsToolstressonthesurfaceuneven,chipandflankbeforeslidingcontactzonebetweenstress,inslidingcontactthestartofthelargest,andincontactwiththetailofzero,soabrasivewearintheregionoccurred.Thisisbecausethecardcuttingedgethanthenearbysettlementsnearthemoreseriouswear,andbladedchipduetothevicinityoftheformerflankandlostcontactwearlighter.ThisresultsfromacertaindistancefromthecuttingedgeofthesurfaceformedbeforetheknifepointMapit,whichisusuallyconsideredbeforewear.Undernormalcircumstances,thisiswearcrosssectionalshapeofanarc.Inmanyinstancesandfortheactualcuttingconditions,theformerflankwearcomparedtoflankwearlight,Thereforeflankwearmoregenerallyasatoolfailureofscalesigns.Butbecausemanyauthorshavesaidinthecuttingspeedoftheincrease,Maetosurfacetemperaturethantheknifesurfacetemperatureshaverisenfaster.Butbecauseanyformofwearrateisessentiallytemperaturechangesbythesignificantimpact.Therefore,theformerusuallywearinhighspeedcuttinghappen.Themaintoolflankwearthetailisnotprocessedwiththeworkpiecesurfaceincontact,Thereforeflankwearthanwearalongwiththeendsmorevisible,whichisthemostcommon.Thisisbecausethelocaleffect,whichisasroughonthesurfacehashardenedlayer,Thiseffectisbycuttinginfrontofthehardeningoftheworkpiece.Notjustcutting,andasoxidationskin,thebladelocalhightemperaturewillalsocausethiseffect.Thispartialwearnormallyreferredtoaspitsexualwear,butoccasionallyitisveryserious.DespitetheemergenceofthepitsontheCuttingToolnatureisnotmeaningfulimpact,butoftenpitsgraduallybecomedarkerIfcuttingcontinuedthecase,thentherecutterfracturecrisis.Ifanyformofsexualallowedtowear,eventuallywearrateincreaseobviouslywillbeatooltodestroyfailuredestruction,thatwillnolongertoolfor202008.12newsmechanicalEnglisharticlecutting,causetheworkpiecescrapped,itisgood,cancauseseriousdamagemachine.Forvariouscarbidecuttingtoolsandforthevarioustypesofwear,intheeventofaseriouslapse,onthetoolthathasreachedtheendofthelifecycle.Butforvarioushighspeedsteelcuttingtoolsandwearbelongingtothenonuniformityofwear,hasbeenfoundWhenthewearandeventoallowforaseriouslapse,themostmeaningfulisthatthetoolcanremilluse,ofcourse,Inpractice,cuttingthetimetousethantheshorttimelapse.Severalphenomenaareonetoolseriouslapsebeganfeaturesthemostcommonisthesuddenincreasecuttingforce,appearedontheworkpieceburningringpatternsandanincreaseinnoise.TheEffectofChangesinCuttingParametersonCuttingTemperaturesInmetalcuttingoperationsheatisgeneratedintheprimaryandsecondarydeformationzonesandthisresultsinacomplextemperaturedistributionthroughoutthetool,workpieceandchip.Atypicalsetofisothermsisshowninfigurewhereitcanbeseenthat,ascouldbeexpected,thereisaverylargetemperaturegradientthroughoutthewidthofthechipastheworkpiecematerialisshearedinprimarydeformationandthereisafurtherlargetemperatureinthechipadjacenttothefaceasthechipisshearedinsecondarydeformation.Thisleadstoamaximumcuttingtemperatureashortdistanceupthefacefromthecuttingedgeandasmalldistanceintothechip.Sincevirtuallyalltheworkdoneinmetalcuttingisconvertedintoheat,itcouldbeexpectedthatfactorswhichincreasethepowerconsumedperunitvolumeofmetalremovedwillincreasethecuttingtemperature.Thusanincreaseintherakeangle,allotherparametersremainingconstant,willreducethepowerperunitvolumeofmetalremovedandcuttingtemperatureswillreduce.Whenconsideringincreaseinundeformedchipthicknessandcuttingspeedthesituationismorecomples.Anincreaseinundeformedchipthicknessandcuttingspeedthesituationismorecomplex.Anincreaseinundeformedchipthicknesstendstobeascaleeffectwheretheamountsofheatwhichpasstotheworkpiece,thetoolandchipremaininfixedproportionsandthechangesincuttingtemperaturetendtobesmall.Increaseincuttingspeed,however,reducetheamountofheatwhichpassesintotheworkpieceandthisincreasethetemperatureriseofthechipinprimarydeformation.

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