光学学报, 2014, 34 (s2): s214006, 网络出版: 2014-12-02  

激光驱动飞片加载软模微弯曲成形方法

Micro Bending Method by Soft Punch under Laser-Driven Flyer Loading
作者单位
江苏大学机械工程学院, 江苏 镇江 212013
摘要
为了研究激光驱动飞片加载软模微弯曲成形,提出的激光驱动飞片加载软模微弯曲成形方法是在脉冲激光冲击波压力下,利用软模作为柔性冲头作用于金属箔板使工件成形。实验中使用Innolas Gmbit公司生产的Spitlight 2000 THG脉冲激光器作为激光源,聚氨酯橡胶薄膜作为软模,采用德国LPKF-ProtoMat-C60型雕刻机在印刷电路板上加工出深度为115 μm的U型槽模具特征,在厚度为30 μm的铜箔板上冲击成形U型凹槽。对工艺参数(激光能量、软模厚度)对成形的影响进行了研究,以及对采用飞片和软模组合作用于工件与采用飞片直接作用于工件进行了对比实验。实验结果表明采用飞片和软模作用于工件能够增大工件的最大成形深度,而且能够提高该技术的成形能力和质量。
Abstract
In order to investigate the micro bending forming by soft punch under laser-driven flyer loading, this paper presents a kind of micro bending method by soft punch under laser-driven flyer loading. In the experiments, a pulse Nd-YAG laser (Innolas Gmbit Spitlight 2000 THG) with Gaussian distribution beam is employed, and the polyurethane rubbers are used as the soft punch. The U-shaped groove with 115 μm in depth is machined on the printed circuit board with the micro-milling of the circuit board engraving machine (LPKF-ProtoMat-C60). After laser impact, the 30 μm thickness cooper foils can replicate the U-shaped groove from the mold. In order to understand the micro bending deformation of metal foil sheet based on the U-shaped groove mold, the influence of various process parameters (including laser energy, the soft punch thickness) on the micro bending deformation is investigated. In addition, for comparing the micro bending experiments by soft punch under laser-driven flyer loading with the micro bending experiment based on the laser-driven flyer, the corresponding experiment is also carried out. The results show the maximum depth of the work piece can be increased by using the flyer and soft punch, the process can improve the work piece forming ability and quality.

张迪, 王霄, 顾春兴, 沈宗宝, 杜道忠, 马友娟, 刘会霞. 激光驱动飞片加载软模微弯曲成形方法[J]. 光学学报, 2014, 34(s2): s214006. Zhang Di, Wang Xiao, Gu Chunxing, Shen Zongbao, Du Daozhong, Ma Youjuan, Liu Huixia. Micro Bending Method by Soft Punch under Laser-Driven Flyer Loading[J]. Acta Optica Sinica, 2014, 34(s2): s214006.

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