中文摘要：

激光驱动飞片微冲裁技术是在约束层模式下利用脉冲激光辐照飞片箔材诱导冲击波驱动高能飞片加载金属薄壁工件实现冲裁的微孔制造技术。实验中，使用INNOLASSpitLight2000Nd—YAG短脉冲激光器，20μm厚的铝制飞片；采用厚度为0．5trimAISI1095钢薄片制作微模具，模具硬度为58HRC，利用皮秒激光铣削技术在模具中心加工微模孔阵列，在厚度为20μm的铝箔板上一次性冲裁出三个外接圆直径为500μm的梅花状通孔。通，过KEYENCEVHX-1000C超景深三维显微系统进行观测，微冲孔具有良好的冲裁轮廓质量，工件上表面与冲裁断面有圆角带过渡，下表面轮廓处毛刺现象不明显。并以ANSYS／LS-DYNA为平台，使用有限网格单元法和流体动力学光滑粒子法对微冲裁过程进行了数值模拟，分别从断面形成、等效应力分布、等效塑性应变分布以及粒子位移变化等不同方面分析了激光驱动飞片多孔微冲裁工艺的基本特性。

英文摘要：

Laser-driven flyer micro-punching technology is a micro-holes manufacturing process. When an intense laser pulse irradiates onto the ablative layer, a flyer with high speed will impact the thin metal workpiece thus punching is completed. In this experiment, a short pulse Nd-YAG laser （INNOLAS Spitlight 2000） is employed, and AI foils with thickness of 20μm are employed as flayers. AISI 1095 high-carbon steel is used as material of die, whose hardness is 58 HRC. The sheet used to make punching die is 0.5 ram in thickness and the through die-openings array in the center position are fabricated by picosecond laser. Three plum-like micro holes with 500 μm in diameter are punched simultaneously on the 20μm thick AI foils. Under the KEYENCE VHX-1000C digital microscope, it can be found that the quality of sheared edges is good, there is an appropriate rollover zone between upper surface and punched fracture, burrs are also reduced a lot. In addition, simulations are conducted by ANSYS/LS-DYNA. The methods of finite element mesh （FEM） and smoothed particle hydrodynamics （SPH） are used. In the simulation, formation process of fracture, equivalent stress distribution, equivalent plastic strain distribution and evolution of displacement of specified particles are studied to analyze basic characteristics of laser-driven flyer micro-punching technology.