Numerical simulation and experimentation of a novel micro scale laser high speed punching
Numerical simulation and experimentation of a novel micro scale laser high speed punching
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DOI：
10.1016/j.ijmachtools.2010.02.003
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发表时间：
2010-05-01
影响因子：
14
通讯作者：
Tao, Maoke
中科院分区：
文献类型：
--
作者：
Liu, Huixia;Shen, Zongbao;Tao, Maoke
提出了一种新的薄板微细冲压加工技术。激光诱导冲击波起到微冲头的作用。可以通过调节激光能量来控制成形速度。利用单次脉冲在厚度为10µm的板材上成功地冲出了直径为250µm的微小孔，获得了良好的边缘质量。微开模用PHi=220微米的铜电极进行电火花加工，在激光脉冲作用下，采用牺牲性涂层产生高压等离子体，未观察到熔化、灼伤或烧蚀迹象。并对微尺度激光高速冲压新工艺进行了数值研究。此外，该方法还可用于在具有非圆形微开模孔的薄板上加工非圆形微小孔。随着激光高速冲压技术的进一步发展，激光高速冲压具有非接触、低成本、高效率等特点，有望成为一种重要的微细冲压技术。(C)2010爱思唯尔有限公司。保留所有权利。
A novel process technology for micro punching of thin sheet metals is presented in this paper. The laser induced shock waves act as the micro punch. The forming speed can be controlled by adjusting the laser energy. Micro holes of 250 mu m in diameter were successfully punched on sheet metal of 10 mu m in thickness by single pulse, and good edge quality was obtained. The micro die-opening is produced by electrical discharge machining (EDM) using the copper electrode of phi=220 mu m. In the experiment, a sacrificial coating is used to generate high-pressure plasma under a laser pulse, so no signs of melting, burning, or ablation were observed on the workpiece. The novel process of micro scale laser high speed punching is also numerically studied. In addition, this method can be used to fabricate noncircular micro holes on thin sheet metals with noncircular micro die-openings. With further development, laser high speed punching may become an important micro punching technology, which is characterized by non-contact, low cost, and high efficiency. (C) 2010 Elsevier Ltd. All rights reserved.