光学学报, 2011, 31 (s1): s100121, 网络出版: 2011-06-23  

激光驱动飞片冲击下的箔板微小孔制造

Micro-hole Manufacturing on Metal Sheet by Laser-Driven Flyer Punching
作者单位
江苏大学机械工程学院, 江苏 镇江 212013
摘要
针对传统微小孔制造工艺在加工过程中遇到的微冲头的制造、冲头与模具的对准性等难题,提出一种基于激光驱动飞片技术实现对工件微冲裁的新工艺。由于飞片在强激光的辐照下会产生较高的动能,当其碰撞到工件上时会产生强大的动态加载压力,结合模具的限制作用,便可实现对工件的冲裁。利用微铣刀在印刷电路板上加工出直径为1 mm的微小孔作为模具,调节作用于飞片上的激光能量大小,实现了对铜箔工件的冲裁,利用XTZ-FG型体式显微镜和蔡司公司AxioCSM700真彩色共焦扫描显微镜对实验结果进行了观察,发现冲裁后的工件不但具有规则的圆孔特征,而且具有较好的光洁度。用数值模拟的方法对该冲裁过程进行分析,证明了该工艺的可行性,为减少实验次数、优化工艺参数奠定了基础。
Abstract
In conventional mechanical punching, the size of the punched holes is limited due to the difficulties of tool fabrication, the difficulties of punch-to-die alignment and the increasing costs of tool fabrication. In order to overcome these problems, a novel micro-hole manufacturing technique based on laser-driven flyer punching is presented. A flyer is irradiated by a short and intense laser pulse, resulting in a high speed and high punch pressure. When the flyer is loaded on the workpiece, the bending and axial stretching of workpiece would take place, and the workpiece could be sheared off around the corner of die. The single micro-hole mould with 1 mm diameter is machined by the micro-milling cutter on printed circuit board. The micro-punching experiment is conducted on copper successfully by controlling the laser energy and good edge quality is obtained. The experimental results are observed by an XTZ-FG stereo-microscope and an AxioCSM700 scanning microscope. The novel process of punching is also numerically studied, which confirms the feasibility of this method and lays the foundation for optimizing the process parameters and reducing the number of experiments.

刘会霞, 王鹤军, 王霄, 沈宗宝, 黄志辉, 李威, 郑远远. 激光驱动飞片冲击下的箔板微小孔制造[J]. 光学学报, 2011, 31(s1): s100121. Liu Huixia, Wang Hejun, Wang Xiao, Shen Zongbao, Huang Zhihui, Li Wei, Zheng Yuanyuan. Micro-hole Manufacturing on Metal Sheet by Laser-Driven Flyer Punching[J]. Acta Optica Sinica, 2011, 31(s1): s100121.

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