板材激光加热弯曲成型的研究

建立了板材激光加热弯曲成型的温度场模型,利用有限元分析软件ANSYS编制了分析激光沿直线扫描板材的仿真软件,分析计算了板材在不同参数下的变形规律。计算结果表明,当其它参数不变的情况下,弯曲角度随着板厚的增加逐渐减少;随着板宽增加而增加;随着激光功率增加先增加后减少;随着光斑直径增大而减小;随着扫描速度的增加先增大后减小;板厚或激光扫描速度较大时板材将发生背向激光束方向的弯曲。并从理论上对板材的激光加热弯曲变形规律作了进一步的分析。

A study on laser bending of sheet metal

An analytical model to describe the temperature field was established for laser bending of sheet metal. In order to analyze the forming rule of the change to different parameters,a simulation software is programmed on laser scanning sheet metal along the line through the finite element analysis' software-ANSYS. The result shows that the bending angle decreases with the increasing thickness of sheet metal,increases with the increasing width of sheet metal,increases first and decreases afterwards with the increasing laser power,focus diameter or scanning speed if others factors remain unchanged. In addition sheet metal will bend deviating from the laser beam if there is a big thickness or a high scanning speed. Finally,the further academic analysis is carried out on the forming rule of laser bending of sheet metal.