资源描述：
《略谈特种加工技术—激光焊接（on the special processing technology of laser welding）》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、略谈特种加工技术—激光焊接（Onthespecialprocessingtechnologyoflaserwelding）OnthespecialprocessingtechnologyoflaserweldingThisisknownas"thetwenty-firstCenturyuniversaltool",thelaserprocessingtechnology,advancedprocessingtechnologyitisahighlyflexibleandintelligent.Thelaserweldingisone
2、oftheimportantaspectsoftheapplicationoflasermaterialprocessingtechnology,ithasopenedaneweraofwelding.Laserweldinghasbeenwidelyusedinmanufacturingindustry,thefieldofpowdermetallurgy,automobileindustry,electronicindustry,biomedicalandotherfields.Weldingtechnologyintheeco
3、nomicandsocialdevelopmentofourcountryhasplayedanimportantrole,butwiththeprogressofscienceandtechnology,applicationofnewmaterialsandnewtechnology,thetraditionalweldingtechnologyhasbeenunabletomeettheincreasinglyhighrequirementsandconditions,whichmakesthelasermeltingofma
4、terialsscience,mechanics,computerscienceandotherrelatedknowledgeandtechnologytheweldingcameintobeing.WorkingprincipleoflaserweldingLaserweldingishaveexcellentdirectivity,highbrightness,highstrength,highmonochromaticity,highcoherencecharacteristicsoflaserbeamradiationto
5、thesurfaceareaoftheworkpiece,alaserbeampassingthroughthefocusingopticalsystem,thepowerdensityofthelaserfocusis104-107W/cm2,andtheinteractionisthroughthelaserweldingmaterial,inaveryshortperiodthetimetobeweldedtoformahighlyconcentratedheatsource,heatcanbeweldedafterzonem
6、eltingandcoolingcrystallizationformasolidsolderjointandweld.Accordingtothelaserandthedifferentwaysofworking,therearetwokindsoflaserweldingmethod,Apulsedlaserwelding,mainlyforsinglepointandcontinuousfixedmaterialweldingbook,acircularformationofthesolderjointsduringweldi
7、ng;Theotheroneiscontinuouslaserwelding,mainlyforlargethickpiecesofweldingandcutting,formingacontinuousweldweldingprocess.Speakingingeneral,thechoiceofweldingmaterial,laserweldingmachine,workingplatform,isthemainfactoraffectingtheeffectoflaserwelding.Themeltingphenomena
8、intheweldingprocesscanproduceandproduceintensitydependsmainlyonthematerialsurface,laserpowerdensityandpeakpower,goodc
