激光弯曲工艺中板材厚度的影响规律

来源期刊：中国有色金属学报1999年第1期

论文作者：李纬民 卢秀春 刘助柏

关键词：织构，单轴拉伸，铝板，取向分布函数（ODF）

Key words：laster bending, flexible forming, numerical simulation, minimal relative laser-besm radius

摘    要：

用大变形弹塑性有限元法对金属板材柔性成形新工艺——激光弯曲进行了动态数值模拟。从热学及热力学的观点出发，阐明了该工艺的变形机理，建立了弯曲过程中的应力模型；论证了板料厚度对温度梯度和弯曲角度的影响，提出了能够实现激光弯曲工艺的最小相对光束半径的新概念，为该工艺进一步深入研究奠定了基础。模拟结果与试验吻合较好。

Abstract: A new flexible forming technique of sheet metal,laser bending process,has been numerically simulated by using finite element method of large elastic-platic deformation.Form the thermodynamics and the theory of heat,the mechanism of laser bending was expounded and the stress model in the process was built.The foundation was laid for further researching the thchnoligy.The influence of sheet thickness on the temperature gradient and bending angle was discussed.The new concept of minimal relative laser-beam radius was proposed,on which the laser bending can be based.It was shown that the calculated values are in good accordance with the experiments.