Abstract：The laser bending test of C194 copper alloy was conducted by pulsed lasers to investigate the effect of laser parameters on bending angle. The tensile strength, load displacement curve, microhardness, surface topography and surface roughness before bending were compared with those after bending. The results indicate that the bending angle increases firstly and then decreases with the increase of laser power and defocusing distance. The bending angle decreases with the increases of scanning velocity,while increases with the increase of scanning times. The relationship between scanning times and bending angle shows approximate linearity for low scanning cycle. The tensile strength is decreased by the increase of laser power, while increased by refining grain at low power condition. There is no obvious stiffening in bended specimen with average surface hardness increasing by 3.3%. The surface roughness and section roughness in x, y direction of sheet metal are increased at different degree by the uneven temperature field induced from laser bending process.
2012, Vol. 33 
