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1、ProcessandDevelopmentofLaserFormingCHENDun-jun XIANGYi-bin WUShi-chun LIMiao-quan(CollegeofMaterialsScienceandEngineering,NorthwesternPolytechnicalUniversity)Abstract: Processcharacteristicsandfourdifferenttypesofmethodswhichincludesheetbendingtowardsthelaserbeam,sheetbendingawayfromthelaser
2、beam,rodbendingandspacedeformationareintroduced.Thedifferentformingmechanismsandpossibleapplyingfieldsarestated.Thedevelopmentprospectoflaserformingisforecast.Keywords: laserforming;sheet;rod;formingmechanismLaserformingisakindofmaterialbylaserbeamirradiationtoformtheinternalsurfaceofnon-uni
3、formthermalstressfieldtoachievethematerialformingthenewtechnology.Byadjustingthelasermachiningprocessparametersandselecttheappropriatescanpathcanbeformedonanyofthebendingparts,pipefittingsandothercomplexthree-dimensionalsurfaceandotherparts.Comparedwiththeconventionalshape,anditsdistinguishi
4、ngfeatureis[1~5]:①laserformingisfreeform,sotheproductioncycleisshort,flexiblelarge,especiallyforsmallbatchproductionoflargeparts;②forminganon-contactlaserforming,Deformationwithoutexternalforce,andthusdoesnotproducerebounddeformationandtheresultingproblems;③laserformingisahotforming,thedefor
5、mationofthetotalaccumulatedbythemultiplescans.Andiscarriedoutunderthehot,thereforedifficulttoshapeatroomtemperature,thedifficultyofsheetmetalformingdeformationorbrittlematerial.1.LaserformingprocessequipmentBecausethelaserbeamformingthepatternofnospecificrequirements,therefore,currentlyonthe
6、marketforcuttingandwelding,theconventionallaserprocessingmachine(suchasCO2,excimer,Nd:YAGlaser)canbeusedforlaserforming.Accordingtodifferentrequirementsoftheworkpieceshape,choosethesecondaxis,three-axisorfive-axislaserprocessingmachine,inordertoobtainanyofthelaserscanningtrajectory.If,asaded
7、icatedlaserformingequipment,shouldalsohavethecoolingdevice,theshapedetectingdeviceandinfraredthermometer.2.MethodandmechanismoflaserformingprocessHistoryofthedevelopmentoflaserformingmorethantenyears,inforeigncountriescurrentlydevelopinganumberofsp