Mechanical Engineering Practice 金工實習(xí)智慧樹知到期末考試答案章節(jié)答案2024年南京理工大學(xué)

MechanicalEngineeringPractice金工實習(xí)智慧樹知到期末考試答案+章節(jié)答案2024年南京理工大學(xué)HighspeedCNCmachiningcangenerallyremovematerialmuchslowerthanAMmachinescanaddasimilarvolumeofmaterial.

答案:錯Thelargepointerofthedialindicatorrotatesbyonedivision,indicatingthatitsrodmovesby0.01mm,sothereadingvalueofthedialindicatoris0.01mm.

答案:對Inthesamelocationtestseveraltimes,takethemaximumvalueasthemeasuringresults.

答案:錯ThetermRapidPrototyping(orRP)isusedinavarietyofindustriestodescribeaprocessforrapidlycreatingasystemorpartrepresentationbeforefinalreleaseorcommercialization.

答案:對Theverniercaliperwithareadingvalueof0.02mm,thescalespacingontherulerbodyis0.02mmlargerthanthescalespacingonthevernier.

答案:對Thetwo-plateinjectionmoldissonamedsinceitconsistsoftwoassembledsections.

答案:對Thehigherthegeometriccomplexity,thegreatertheadvantageAMhasoverCNC.

答案:對Airshipsandballoonsgoupandstayintheairbyfillingthemwithlightgases.

答案:對Airship,an

aircraft

that

consists

of

a

cigar-shaped

gas

bag,

or

envelope,

filledwith

a

lighterthanairgas

to

provide

lift,

a

propulsion

system,and

soon.

答案:對AllAMmaststartfromasoftwaremodelthatfullydescribestheexternalgeometry.

答案:對Airship,an

aircraft

that

consists

of

a

cigar-shaped

gas

bag,

or

envelope,

filledwith

a

lighterthanairgas

to

provide

lift,

a

propulsion

systemand

soon.

答案:對Theprimarypurposeofthepartingplaneistotightlysealthecavityofthemoldandpreventmeltleakage.

答案:對Automaticprogrammingisefficientandcanmeetallrequirements.

答案:錯Measuringtheroundnesserrorcanbeusedinthreepointmethod.

答案:對Thegeometrictoleranceistolimittheshapeerrorofthepart.

答案:錯Therougherthesurfaceofthepart,thebetterthewearresistance.

答案:錯Thetemperatureofthemoldedpartsatthetimeofejectionisnotacomplexfunctionfothemoldedpartdesign,coolinglinedesign,materialproperties.

答案:錯Vernierprotractor’sreadingprincipleassameastheverniercaliper.

答案:對ThepartingplaneoftheinjectionmoldislocatedbetweentheAandtheBplates.

答案:對Itisnotnecessarilythatthetwocavitymoldhastwocavitiestoproducetwomoldingsineachmoldingcycle.

答案:錯ThethinnereachlayerisnotthecloserthefinalpartwillbetheoriginalinAM.

答案:錯AMtakesfulladvantageofmanyoftheimportantfeaturesofcomputertechnology,bothdirectly(intheAMmachinesthemselves)andindirectly(withinthesupportingtechnology).

答案:對Objectivesinmoldcoolingsystemdesigninclude().

答案:minimizemoldcost;facilitatemoldusage;minimizevolumeandcomplexityAdditiveManufacturingisbecomingmoreandmorepopularinmedicalapplications,wherepatient-specificgeometriesarerequired.WhichcanbeformedbyAdditiveManufacturing？

答案:dentistry;orthopedics;hearingaidsComparedtosteel,whataretheadvantagesofplastics?（）

答案:betterprocessingperformance;betterplasticity;lowdensity;bettercorrosionresistanceAircraftsgenerallyrefertoflightvehiclesflyingintheatmosphere,like().

答案:Airplanes;helicopters;hot-airballoonsWhatarethestagesinmostinjectionmoldingprocesses?()

答案:cooling;injection;plastication;moldresetting;packingTheinnerdiameterdialindicatorandtheinnerdiametermicrometercanreadthemeasuredsizedirectlyfromthemeasuringinstrument.

答案:錯TheSTLfiledescribestheexternalclosedsurfacesoftheoriginalCADmodelandformsthebasisforcalculationoftheslices.

答案:對Whatarethestepanalysisprocessfortheanalysisanddesignofvents?()

答案:Theairdisplacementrateshouldbeestimatedrelativetothemeltflowrate.;Thenumber,type,andlocationofventsmustbeassessed.;Thewidth,length,andthicknessofeachventmustbespecified.Thevernieruniversalanglerulercanmeasureanyanglefrom0°to360°.

答案:錯Thestandardizationofthebasicdimensionsisto().

答案:simplifythespecificationsandquantityoffixed-valuetoolsandmeasuringtoolsTheworkingprincipleofthedialindicatoristoconvertthelinearmovementofthemeasuringrodintoapointer（）throughtherackandgeartransmission.

答案:SwingmotionMatchingholeandshaft,thesizeoftheholeisφ40+0.15+0.05mm,thesizeoftheshaftisφ400.-0.10mm,andtheirgapis（）.

答案:0.25Whatrelationshipsarestudiedinmaterialsscience?()

答案:processing;structure/composition;performance;propertiesVerniercalipersaresuitablefor（）sizemeasurementandinspection.

答案:MediumaccuracyParallelismtolerancebelongsto（）toleranceinpositiontolerance.

答案:OrientationWhichofthefollowingoperationsarestepsofmetallographicspecimenspreparation?()

答案:grinding;polishing;mounting;etchingWiththeadditionofsomesupportingtechnologieslike（）,etc.AMtechnologycanbepossibletomanufactureavastrangeofdifferentpartswithdifferentcharacteristics.

答案:polishers;grinders;silicon-rubbermolding;drillsInthemarkingofthesurfaceroughnesscode,theparametercodemaynotbemarkedwhenthe（）parameterisused.

答案:RaThecoaxialitytolerancebelongsto（）tolerance.

答案:OrientationTheassemblyprocessofthehelicoptermodelneedstobeverycareful,payattentiontoeverydetail,including(

)

答案:Glue;DirectionoftheapronpartThe

helicopter

uses

gravity

and

updrafts

of

airto

keep

it

flying;

slope

soaring

relies

onwind

rising

off

dunes

or

hillsides.

答案:錯Glider

a

heavier-than-air

craft

with

flapping

wings.

A

flapping

motion

of

wings

is

used

inflight

by

various

living

beings,

such

as

birds.

答案:錯Weseethatheavier-than-airaircraftare(

)

答案:rockets;glidersDigitalistheprocessthatintegratedapplies

()totransformtraditionalcontentandtechnologysystem.

答案:informationtechnology;computertechnology;networktechnologyServicesNetworkisnotamajordriverofindustry4.0.

（）

答案:錯Digitizationisthroughouttheprocess

ofProductLifeCycle.（）

答案:對Digitaldesignandmanufacturemainlyincludes()

fordatatransmission.

答案:DigitalmeansInthesecondindustrialrevolution,large-scaleproductionusingelectricdriveswasappeared..

（）

答案:對Accordingtotheshapeandprocessingrequirements,programmercompilesmachiningprocessintomachiningprogram.（）

答案:對Manufacturingresources

just

include

technicalresources

and

materialresources.（）

答案:錯Industry4.0beganinthe18centurywiththeintroductionofmachinerymanufacturingequipment.

（）

答案:對Inthecompany-wideprogramlayer,wegenerallyuse

ManufacturingExecutionSystems.（）

答案:錯Typically,therearefourmainmethodsofrapidprototyping.

（）

答案:對Pearliteisatwo-phased,lamellarstructurecomposedofalternatinglayersof().

答案:ferriteandcementiteMaterialscienceistheinvestigationoftherelationshipamong().

答案:processing;structure/composition;properties;performanceTheuseofmaterialsbeginsin().

答案:stoneageStructuralmaterialsinclude().

答案:aluminum;steel;ironObservedphasesduringopticalmicroscopyobservationofironandsteelinclude().

答案:α-ferrite;δ-ferrite;γ-austenite;CementiteIroncanbeclassifiedinto().

答案:whitecastiron;spheroidalgraphitecastiron;greycastironStepsofmetallographicspecimenspreparationinclude().

答案:etching;grinding;polishing;mountingFunctionalmaterialsinclude().

答案:superconductingmaterials;magneticmaterialsThedeterminationof()onspecimensisimportantforqualitycontrol.

答案:grainsizeNaturalmaterialsinclude().

答案:bone;fibers;feather;clayServiceisalsoakindofproduct.（

）

答案:對Industrialdesignappearedbeforetheindustrialrevolution.（

）

答案:錯Whichofthefollowingisnotafunctionofrenderings?(

)

答案:communicatewithdownstreamindustryClassicblueisthepopularcolorof(

).

答案:2020MUJIproductshaveveryrichcolors.（

）

答案:錯Whenweareresearchingexistingproducts,thefollowingpointsneedtobeconsidered.(

)

答案:price;appreciation;function;materialPayingattentiontoindustrialdesignisApple'swaytosuccess.（

）

答案:對Productdesignincludes（

）.

答案:improveddesign;conceptualdesign;innovativedesignDesignsketchcanhelpdesignerstoclarifydesignideasquickly.

（

）

答案:對ThesuccessoftheOXOpeelerisdueto(

).

答案:antiskidfeatures;innovativeapplicationofmaterials;beautifulappearanceAfterthepartspatternanalysis,weneedtoplaitthemachiningtool'spathanddynamic

simulatethepathbasedontheMasterCAM.

答案:對Afterwechoosethelathe,weneedtoensuretherouteoftheknifeaccordingtotherequirementsofthepartsprocessing.

答案:對Wecanchoosethelatheaccordingtotherequirementsofthepartsprocessing.

答案:對WhenwedoprogramminginMasterCAMweneedtomovethedrawingtotheoriginofthecoordinates.

答案:對Theprocessingmethodsincludemillingtheshape,millingtheplanar,chamferring,drillingholesandsoon.

答案:對WecancompleteanautomaticprogrammingofNClathebasedon(

)software.

答案:MasterCAM.Weneedselecttheparametersoftheroughmachiningandthefinishmachining.

答案:對InMasterCAMwecanseetherouteoftheknife.

答案:對weneedtomakethemodelinginthesoftwaressuchas（

）

答案:Creo;AutoCAD;SolidworksWeChoosethe

keyseatcutteraccordingtotheprocessingrequirements.

答案:對Near-netshapingisanotherimportantfeatureofAMtechnology,whichsignificantlyminimizesmaterialuseandwaste.AjointstudyhasshownthatAMisabletoreducetheconsumptionofrawmaterialsbyupto

答案:75%WhichisthemostwidelyusedAMtechniqueatthepresentday？

答案:FusedDepositionModeling(orFDM)WherecouldAdditiveManufacturingbeused?

答案:art;jewelry;architecture;medical;defense;aerospace;automotiveWellsuitingtherequestsofmodernmanufacturingclimate,AdditiveManufacturingisviewedasthenewindustrialrevolution,makingitswayintoacontinuouslyincreasingnumberofindustries.

答案:對WhichapparatuswasAMtechnologycommercializedwith?

答案:Stereolithography(SLorSLA)AMmachineisaWhatYouSeeIsWhatYouBuild(WYSIWYB)processthat’sparticularlyvaluablethemorecomplexthegeometryis.

答案:對WhicharethecharacteristicsofAMtechnology？

答案:shortleadtime;superiorflexibility;near-netshaping;instantlocalproductiononaglobalscaleWhicharethesametechniqueswithAdditiveManufacturing？

答案:freeformfabrication;RapidPrototyping;additivefabrication;3DprintingWhileearlierworkinJapanisquitewell-documented,provingthatthisconceptcouldberealized,itwasthepatentbyCharlesHullthatisgenerallyrecognizedasthemostinfluential

sinceitgaveriseto3DSystems.

答案:對WhichcanbeusedbyAdditiveManufacturing？

答案:liquids;wires;sheets;powdersThesurfaceroughnesssymbolrepresentsthemachinedsurfaceobtainedbymaterialremoval.

（）

答案:錯Theouterdiametermicrometerisameasuringtoolformeasuringapertureandgroovedepth.

（）

答案:錯Whenmeasuringworkpiecewithverniercaliper,themeasurementerrorwillincreaseiftheforceistoolargeortoosmall.

（）

答案:對Surfaceroughnessbelongstomicrogeometricerror.

（）

答案:對Thesurfaceroughnessofpartsisdirectlyrelatedtotheprocessingmethod.（）

答案:對Whetherapartisqualifieddependsfirstonwhetherithas