完整版机械毕业设计外文翻译7243268.docx
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完整版机械毕业设计外文翻译7243268
IntroducitonofMachining
Haveashapeasaprocessingmethod,allmachiningprocessfortheproductionofthemostcommonlyusedandmostimportantmethod.Machiningprocessisaprocessgeneratedshape,inthisprocess,Driversdeviceontheworkpiecematerialtobeintheformofchipremoval.Althoughinsomeoccasions,theworkpieceundernocircumstances,theuseofmobileequipmenttotheprocessing,However,themajorityofthemachiningisnotonlysupportingtheworkpiecealsosupportingtoolsandequipmenttocomplete.
Machiningknowtheprocess.Forcasting,forgingandmachiningpressure,everyproductionofaspecificshapeoftheworkpiece,evenaspareparts,almosttheshapeofthestructure,toalargeextent,dependoneffectiveintheformofrawmaterials.Ingeneral,throughtheuseofexpensiveequipmentandwithoutspecialprocessingconditions,canbealmostanytypeofrawmaterials,mechanicalprocessingtoconverttherawmaterialsprocessedintothearbitraryshapeofthestructure,aslongastheexternaldimensionslargeenough,itispossible.Becauseofaproductionofspareparts,evenwhenthepartsandstructureoftheproductionbatchsizesaresuitablefortheoriginalcasting,Forgingorpressureprocessingtoproduce,butusuallyprefermachining.
Strictprecisionandgoodsurfacefinish,Machiningthesecondpurposeistheestablishmentoftheandsurfacefinishpossibleonthebasisof.Manyparts,ifanyothermeansofproductionbelongingtothelarge-scaleproduction,WellMachiningisalow-toleranceandcanmeettherequirementsofsmallbatchproduction.Besides,manypartsontheproductionandprocessingofcoarseprocesstoimproveitsgeneralshapeofthesurface.Itisonlynecessaryprecisionandchooseonlythesurfacemachining.Forinstance,thread,inadditiontomechanicalprocessing,almostnootherprocessingmethodforprocessing.Anotherexampleistheblacksmithpieceskeyholeprocessing,aswellastrainingtobeconductedimmediatelyafterthemechanicalcompletionoftheprocessing.
PrimaryCuttingParameters
Cuttingtheworkpieceandtoolbasedonthebasicrelationshipbetweenthefollowingfourelementstofullydescribe:
thetoolgeometry,cuttingspeed,feedrate,depthandpenetrationofacuttingtool.
CuttingToolsmustbeofasuitablematerialtomanufacture,itmustbestrong,tough,ordertoeffectivelyprocessing,andcuttingspeedmustadapttothelevelofspecificparts--withknives.Generally,themoretheworkpieceortoolforreciprocatingmovementandfeedrateoneachtripthroughthemeasurementofinches.Generally,inotherconditions,feedrateandcuttingspeedisinverselyproportionalto。
Depthofpenetrationofacuttingtool--toinchesdollars--isthetooltotheworkpiecedistance.Rotarycuttingittothechiporequaltothewidthofthelinearcuttingchipthickness.Roughthanfinishing,deeperpenetrationofacuttingtooldepth.
WearsofCuttingTool
Wealreadyprocessedandtherattleofthecountlesscracksedgetool,welearnthattoolweararebasicallythreeforms:
flankwear,theformerflankwearandV-Notchwear.Flankwearoccurredinboththemainbladeoccurredviceblade.Onthemainblade,shoulderremovedbecausemostmetalchipmandate,whichresultedinanincreasecuttingforceandcuttingtemperatureincrease,Ifnotallowedtocheck,Thatcouldleadtotheworkpieceandthetoolvibrationandprovideforefficientcuttingconditionsmaynolongerexist.Vice-bladedon,itisdeterminedworkpiecedimensionsandsurfacefinish.Flankwearsizeofthepossiblefailureoftheproductandsurfacefinisharealsoinferior.Inmostactualcuttingconditions,astheprincipalintheformerfirstdeputyflankbeforeflankwear,weararrivalenough,Toolwillbeeffective,theresultsaremadeunqualifiedparts.
AsToolstressonthesurfaceuneven,chipandflankbeforeslidingcontactzonebetweenstress,inslidingcontactthestartofthelargest,andincontactwiththetailofzero,soabrasivewearintheregionoccurred.Thisisbecausethecardcuttingedgethanthenearbysettlementsnearthemoreseriouswear,andbladedchipduetothevicinityoftheformerflankandlostcontactwearlighter.ThisresultsfromacertaindistancefromthecuttingedgeofthesurfaceformedbeforetheknifepointMapit,whichisusuallyconsideredbeforewear.Undernormalcircumstances,thisiswearcross-sectionalshapeofanarc.Inmanyinstancesandfortheactualcuttingconditions,theformerflankwearcomparedtoflankwearlight,Thereforeflankwearmoregenerallyasatoolfailureofscalesigns.Butbecausemanyauthorsthecuttingspeedoftheincrease,Maetosurfacetemperaturethantheknifesurfacetemperaturesfaster.butbecauseanyformofwearrateisessentiallytemperaturechangesbythesignificantimpact.Therefore,theformeru