先进制造技术复习题--总

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1、MODEL11.What’sthedefinitionofCAD?CADisanadvancedinformationhandlingtechnologytosolvedesignproblemsforengineers.CADcombinespeople’sabilitiesofdeducingandcreationwithcomputer’sfunctionsofprocessingandinformationstorage2.What’sthehistoricaldevelopmentofCAD?(1)2DDrawingand3DWireframemodel

2、ingin1960s(2)Surfacemodelingin1970s;(3)Solidmodelingin1980s;(4)Parameterizedandvariablemodelingin1990s.3.Whatarethethreemethodsofproductdesigninclude?Pleasegivetheircharacterizes.RoutineDesign（常规设计）:onlychangingsomeparametersInnovativeDesign（革新设计）:changingsomepartsCreativeDesign（创新设计）

3、:developinganewproduct4.Pleasegivethephasesthatproductdesignprocessisdividedinto.DemandAnalysis→ConceptualDesign→DetailDesign→ProductionPlanning5.Whatarethethreephasesofconceptualdesign?Generate、Value、Select6.WhatarethefunctionsofCAD?(1)Geometrymodeling(2)Designreviewandanalysis(3)Dyn

4、amicimitating(4)Designdocumentation7.Whatarethethreemethodsofgeometrymodeling?Andgivethedisadvantageofeachmethod.WireframeModeling:(1)Unabletoexpresscurvemodels(2)AmultivocalmodelSurfaceModeling:(1)Onlysuitableforshell;(2)Noinformationaboutsolidorhollow,insideoroutside;(3)Noinformatio

5、naboutqualityandvolume;(4)Unsuitableforanalysis.SolidModeling:(1)Lackofengineeringinformation(tolerance,roughness,material);(2)Can’trealizeintegrationofCAD/CAM.8.Whatarethepopularmethodsofsolidmodeling?①Constructivesolidgeometry(CSG)②Sweeprepresentation9.HowdoesFEAwork?Andwhichparamet

6、ersdoesFEAdemand?1)Breakinganobjectupintomanysmallrectangularortriangularelements;2)Analyzingtheresponseofeachfiniteelementtothestress,heat,orotherforce;3)Combiningallelementsandpredictingthereactionofthewholeobject.MODEL2Basicconcepts：1、theconcepts,componentsandcharacteristicsofNC,NC

7、,CNC,MCU,DPU,CLUandMC①NumericalControlAsysteminwhichactionsarecontrolledbythedirectinsertionofnumericaldataatsomepoint.Thesystemmustautomaticallyinterpretatleastsomeportionofthisdata.②DirectNumericalControl(DNC)DNCreferstoamanufacturingsystemthatusesacentralcomputertocontrolseveralmac

8、hines