Mechanical Engineering Practice 金工实习智慧树知到期末考试答案章节答案2024年南京理工大学

MechanicalEngineeringPractice金工实习智慧树知到期末考试答案+章节答案2024年南京理工大学HighspeedCNCmachiningcangenerallyremovematerialmuchslowerthanAMmachinescanaddasimilarvolumeofmaterial.

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

答案:对Inthesamelocationtestseveraltimes,takethemaximumvalueasthemeasuringresults.

答案:错ThetermRapidPrototyping(orRP)isusedinavarietyofindustriestodescribeaprocessforrapidlycreatingasystemorpartrepresentationbeforefinalreleaseorcommercialization.

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

答案:对Thetwo-plateinjectionmoldissonamedsinceitconsistsoftwoassembledsections.

答案:对Thehigherthegeometriccomplexity,thegreatertheadvantageAMhasoverCNC.

答案:对Airshipsandballoonsgoupandstayintheairbyfillingthemwithlightgases.

答案:对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:对AllAMmaststartfromasoftwaremodelthatfullydescribestheexternalgeometry.

答案:对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:对Theprimarypurposeofthepartingplaneistotightlysealthecavityofthemoldandpreventmeltleakage.

答案:对Automaticprogrammingisefficientandcanmeetallrequirements.

答案:错Measuringtheroundnesserrorcanbeusedinthreepointmethod.

答案:对Thegeometrictoleranceistolimittheshapeerrorofthepart.

答案:错Therougherthesurfaceofthepart,thebetterthewearresistance.

答案:错Thetemperatureofthemoldedpartsatthetimeofejectionisnotacomplexfunctionfothemoldedpartdesign,coolinglinedesign,materialproperties.

答案:错Vernierprotractor’sreadingprincipleassameastheverniercaliper.

答案:对ThepartingplaneoftheinjectionmoldislocatedbetweentheAandtheBplates.

答案:对Itisnotnecessarilythatthetwocavitymoldhastwocavitiestoproducetwomoldingsineachmoldingcycle.

答案:错ThethinnereachlayerisnotthecloserthefinalpartwillbetheoriginalinAM.

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

答案:对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:错TheSTLfiledescribestheexternalclosedsurfacesoftheoriginalCADmodelandformsthebasisforcalculationoftheslices.

答案:对Whatarethestepanalysisprocessfortheanalysisanddesignofvents?()

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

答案:错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:错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:错Weseethatheavier-than-airaircraftare(

)

答案:rockets;glidersDigitalistheprocessthatintegratedapplies

()totransformtraditionalcontentandtechnologysystem.

答案:informationtechnology;computertechnology;networktechnologyServicesNetworkisnotamajordriverofindustry4.0.

（）

答案:错Digitizationisthroughouttheprocess

ofProductLifeCycle.（）

答案:对Digitaldesignandmanufacturemainlyincludes()

fordatatransmission.

答案:DigitalmeansInthesecondindustrialrevolution,large-scaleproductionusingelectricdriveswasappeared..

（）

答案:对Accordingtotheshapeandprocessingrequirements,programmercompilesmachiningprocessintomachiningprogram.（）

答案:对Manufacturingresources

just

include

technicalresources

and

materialresources.（）

答案:错Industry4.0beganinthe18centurywiththeintroductionofmachinerymanufacturingequipment.

（）

答案:对Inthecompany-wideprogramlayer,wegenerallyuse

ManufacturingExecutionSystems.（）

答案:错Typically,therearefourmainmethodsofrapidprototyping.

（）

答案:对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:对Industrialdesignappearedbeforetheindustrialrevolution.（

）

答案:错Whichofthefollowingisnotafunctionofrenderings?(

)

答案:communicatewithdownstreamindustryClassicblueisthepopularcolorof(

).

答案:2020MUJIproductshaveveryrichcolors.（

）

答案:错Whenweareresearchingexistingproducts,thefollowingpointsneedtobeconsidered.(

)

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

）

答案:对Productdesignincludes（

）.

答案:improveddesign;conceptualdesign;innovativedesignDesignsketchcanhelpdesignerstoclarifydesignideasquickly.

（

）

答案:对ThesuccessoftheOXOpeelerisdueto(

).

答案:antiskidfeatures;innovativeapplicationofmaterials;beautifulappearanceAfterthepartspatternanalysis,weneedtoplaitthemachiningtool'spathanddynamic

simulatethepathbasedontheMasterCAM.

答案:对Afterwechoosethelathe,weneedtoensuretherouteoftheknifeaccordingtotherequirementsofthepartsprocessing.

答案:对Wecanchoosethelatheaccordingtotherequirementsofthepartsprocessing.

答案:对WhenwedoprogramminginMasterCAMweneedtomovethedrawingtotheoriginofthecoordinates.

答案:对Theprocessingmethodsincludemillingtheshape,millingtheplanar,chamferring,drillingholesandsoon.

答案:对WecancompleteanautomaticprogrammingofNClathebasedon(

)software.

答案:MasterCAM.Weneedselecttheparametersoftheroughmachiningandthefinishmachining.

答案:对InMasterCAMwecanseetherouteoftheknife.

答案:对weneedtomakethemodelinginthesoftwaressuchas（

）

答案:Creo;AutoCAD;SolidworksWeChoosethe

keyseatcutteraccordingtotheprocessingrequirements.

答案:对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:对WhichapparatuswasAMtechnologycommercializedwith?

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

答案:对WhicharethecharacteristicsofAMtechnology？

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

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

sinceitgaveriseto3DSystems.

答案:对WhichcanbeusedbyAdditiveManufacturing？

答案:liquids;wires;sheets;powdersThesurfaceroughnesssymbolrepresentsthemachinedsurfaceobtainedbymaterialremoval.

（）

答案:错Theouterdiametermicrometerisameasuringtoolformeasuringapertureandgroovedepth.

（）

答案:错Whenmeasuringworkpiecewithverniercaliper,themeasurementerrorwillincreaseiftheforceistoolargeortoosmall.

（）

答案:对Surfaceroughnessbelongstomicrogeometricerror.

（）

答案:对Thesurfaceroughnessofpartsisdirectlyrelatedtotheprocessingmethod.（）

答案:对Whetherapartisqualifieddependsfirstonwhetherithas