激光冲压钛合金板小曲率成形研究

Study on little curvature forming of titanium alloy sheet under laser shock

为了探索钛合金板材激光冲击成形的新工艺这一目的,采用了激光冲击波技术对钛合金板料进行了激光冲击成形实验和仿真分析,取得了在激光波长为1.054μm、脉宽约23ns、能量约35 J、有效光斑直径8mm、脉冲重复率0.5Hz条件下,钛合金板料变形的实验和仿真数据。实验和仿真结果均表明,对于钛合金这一类用传统的加工工艺难以成形的材料,采用激光冲击这一新颖先进的加工手段,只要控制好用于冲击的激光参数和冲击路径,就可以使板料发生事先设定的小曲率变形。这一实验和仿真结果对揭示在激光连续冲击条件下,激光加工参数、板料力学性能、约束边界、冲击路径等条件对板料小曲率成形深度、成形轮廓的影响是有帮助的。

For the sake of probing into the new technique of titanium alloy sheet shaping under laser shock, simulation and experiments were executed on titanium alloy sheet. The experimental and simulative data were obtained under the condition of 1. 054μm laser wavelength,23 ns pulse width, about 35J laser energy,8mm laser bright spot diameter and 0.5 Hz pulse repetition rate. The results indicated that for such hard-shaped materials as titanium alloy with conventional technology, the little curvature forming of titanium alloy sheet could be happen with such a novel and advanced shape forming technology as long as the laser parameters and shock paths were effectively controlled. The experimental and simulative results were helpful to studying the effect of laser parameters, metal properties, confining boundary and shock path on titanium sheet shaping under the condition of consecutive laser shock.