激光焊接手册.pdf

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Contributors:PhilipsCFTSiemensFiatCRFSTEAGmicroPartsThermoformFhG-ILTRofin-SinarAveciaDSMResearchKath.UniversiteitLeuvenNewadvancesinpolymerlaserwelding21HZDGYDQFHVLQSROPHUODVHUZHOGLQJ1Summaryandconclusions2Introduction3Basicprocessinformatio

2、n3.1Potentialoflaserwelding3.2Parametersandtheirinfluence3.3Materials3.4Equipment3.5Weldgeometry3.6Weldquality4ApplicationsAcknowledgement,authorsAppendix(references)Thisdocumentmaybedistributedfreely,undertheprovisionthatnochangesaremade.Partsofthispublicationmaybereproducedifduereferenceism

3、adetothisdocument.Thepictureonthefrontpageshowsthe3DContourweldingofarearlightusingarobotaswellasafibrecoupleddiodelasersystem.(picturebycourtesyofILT)Newadvancesinpolymerlaserwelding36XPPDU&RQFOXVLRQVPolymerlaserweldingisanemergingjoiningtechnology.Itoffersseveraladvantagescomparedtoexi

4、stingweldingtechniques,suchas:n([FHOOHQWYLVXDODSSHDUDQFH•Noorhardlyanyweld-flashisformed•Nodamagetoproductexteriorasonlylimitedmechanicalloadisexertedduringwelding..n:LGHDSSOLFDELOLW•LaserweldingisideallysuitedforPLQLDWXULVDWLRQGood-qualitybondscanbeobtainedeveniftheavailableweldinga

5、reaisverysmall,whileprocess-timescanbe<0.5s.•Ontheotherhand,laser-weldingcanalsobeusedtoadvantageforYHUODUJHSURGXFWVwithseveralmetersofweld-length.•ThermoplasticHODVWRPHUVcanbewelded.n0LQLPDOLQIOXHQFHRQWKHSURGXFW•Theheat-affectedzoneisverysmall.Asaresult,built-instressesarenotlarge.•

6、Sensitivecomponentsorpartsarenotaffected,eveniftheseareclosetotheweldzone.Noelectricalfieldsormechanicalvibrationsaregenerated,contrarioustomostotherweldingprocesses.n:HOGLQJRI'VKDSHGZHOGLQJFRQWRXUVn3URFHVVIOH[LELOLWWiththeproperweldingequipment,itisquiteeasytoswitchfromoneproductto

7、another.Someboundaryconditionsastomaterialsandproductdesignhavetobefulfilled.Themostimportantconditiontothematerialsisthatoneproductpartshouldbetransparentforlaserradiation,whereastheotherparthastobeabsorbent.Asregardsproductdesign,them