资源描述：
《风洞模型的计算机辅助设计和辅助制造（英）》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。
1、归‘卜7丫，、(‘习雌理汕甘l;011if/l"/'，经;厂}tq,v}})确屯莽勺工兮
2、纬蜘·之一钾翱场慈只才0-1,1,%丫迄一}}Ttt}"工炭。龟雾研L泥、、’{,L}I,rye若}不过“，，爹洲版和必份‘补耀九种时甲二，夕扣畔‘叮枷“‘}自‘“叫·‘鸿诊仙/v+芝一I`-I(‘-柞本孙‘殊('午2,)6--}r/l私和Y2}},私渺伽g(cfv,,c知t,}(,}u,钢““。I}/Iy可粼擎汤畔/乡分;-5S计，}r,F)c、可务等而、'}'/1-ft-。j}’洲/2l仰司竿‘习·,}('I
3、Uovyh,es},,cIK/-)物节“帆‘厂/vct吟‘八·}}Pq}}·}(+1)c}}卫落;，64"irl乙/VC-扮嘟外xM}ABSTRACT:PrecisionMachiningisthetechnologyusedtoproduceavVO)rkpiecewithprecisedimensions.Ingeneralitisaverywideexpression,andhasrelationswithlotsofengineeringfields.Thispaperisconcentrati
4、ngontheresearchonmanufacturingarocketmodel,whichisconsideredasaprecisemachiningprocess.Thesuitablefieldcoveredbyprecisionmechanicscience,andservingtheaimverywellistheComputer-AidedDesign&Computer-AidedManufacturing(CAD/CAM)technology.Thishasbeendiscussed
5、wellanddeterminedbythemechanicalengineeringdepartmentinBeijingUniversityofAeronauticsandAstronautics(BUAA).However,CAD/CAMrelativelyisanewtechnology,anditsmaincomponentsaretheComputersandComputerNumericalControlled(CNC)Machines,thushighdrawingsqualitycan
6、beobtainedbyusingtheavailableCADsoftwares(draftingormodeling),andhighmanufacturingaccuracycanbeachievedbyusingtheCNCmachines,andthisistheexacttargetoftheprecisionmechanicresearchtobediscussedinthisreport.InChapter1,aliteratureintroductioniswritenaboutthe
7、emergenceofCAD/CAMtechnology,andaboutthemaincomponentsofthistechnologyincludinggeometricmodelingsoftwares(CADsystems),NCpartprogrammingandtheCNCmachines.InChapter2,ithasfocusedonhowtheCAD/CAMtechnologycomponentsmentionedabovecanbeused,andsomepracticalexa
8、mplesarestudiedindetails(preparegeometricmodelingdrawings,andNCpartprograms,andfinallythemachining).InChapter3,ithasconcentratedontheaimofthisresearchthatisthemachiningofawindtunnelmodel.Thepracticalexamplesandthewindtunnelmodeldrawingsarepreparedbyusing
9、Unigraphicsmodelingsoftware.TheNCprogramsforthepracticalexamplesaremanuallywriten,whileforthewindtunnelmodel;thedrawingistransferredtoCAXA'ssoftwaretodeveloptheNCprogram.ThisisbecauseusingUnigraphicssoftwareforthisdutywasv
