A new analytical model for laser bending

Abstract

A new calculating formula on the bending angles of sheet metal was obtained.The formula involves in the energy (laser power,absorption,scanning velocity,laser spot diameter),geometric (sheet thickness) and material parameters (thermal expansion coefficient,heat specific,density,thermal conductivity,Youngs modulus,yield strength).The formula was tested by experiments.The experimental results show that hte precision of the formula is higher than that of the other formulae.And the minimal energy density that makes the sheet metal be deformed can be forecasted conveniently by the formula.It is helpful to the choice of process parameters,so it has higher engineering value.