抄録
Laser peen forming is an incremental sheet metal forming using shock waves induced by a short pulse laser. The authors have adopted laser peen forming with a femtosecond laser for thin-sheet-metal bending. To investigate properties of such forming, several thin sheets of pure aluminum, phosphor bronze and austenitic stainless steel were bent. Results showed that there is a relationship between bending angle and the product of spot diameter and fluence (density of pulse energy). Forming a spot shape was effective in changing bending efficiency. These results are useful for controlling bending deformation. The influences of material properties and sheet thickness were investigated. It was found that thinner and softer sheet metal was easy to bend. Moreover, the forming properties of phosphor bronze and stainless steel were easily affected by the condition of the laser emitter.
