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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INNOLAS SpitLight 2000Nd-YAG短脉冲激光器,20μm厚的铝制飞片;采用厚度为0.5mm AISI 1095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KEYENCE VHX-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。
Laser-driven flyer Micro-blanking technology is a micro-hole manufacturing technology that uses pulsed laser to irradiate fly foil to induce blaster in high-energy flying-sheet loaded metal thin-walled workpiece. In the experiment, an INNOLAS SpitLight 2000 Nd-YAG short pulse laser and an aluminum flyer with a thickness of 20 μm were used. A micro-mold with a thickness of 0.5 mm AISI 1095 steel sheet was used, the mold hardness was 58 HRC, and the micro- Die-hole array, a thickness of 20μm aluminum foil plate blanked out three punctured circle diameter of 500μm plum blossom-like through-hole. By KEYENCE VHX-1000C super-depth of field 3D microscopy observation, micro-punching has a good blanking contour quality, the workpiece surface and blanking section fillet with the transition, the lower surface of the glitch phenomenon is not obvious. Based on the ANSYS / LS-DYNA platform, the finite element method and the hydrodynamic smooth particle method were used to simulate the micro-blanking process. From the section formation, the equivalent stress distribution, the equivalent plastic strain distribution, Displacement and other aspects of changes in the laser-driven multi-hole porous micro-blanking the basic characteristics of the process.