Experimental and Numerical Simulation Research on Micro-Gears Fabrication by Laser Shock Punching Process
Experimental and Numerical Simulation Research on Micro-Gears Fabrication by Laser Shock Punching Process
复制标题
激光冲击冲孔加工微型齿轮的实验与数值模拟研究
DOI：
10.3390/mi6080969
复制
发表时间：
2015-08-01
期刊：
影响因子：
3.4
通讯作者：
Wang, Xiao
中科院分区：
文献类型：
--
作者：
Liu, Huixia;Li, Jianwen;Wang, Xiao
本文采用Spitlight 2000型Nd-YAG激光器对微型齿轮进行激光冲击成形，深入探讨了激光能量、软冲性能和压边圈等工艺参数对微型齿轮成形质量的影响。结果表明，冲击能量为1690 mJ时，尺寸精度最好。在低能量激光作用下，材料的断裂模式主要为拉伸断裂而不是剪切断裂。软冲头在使用过大的能量时，可能会对冲压质量造成损害。软冲头的厚度和硬度要合适。厚度为200 µm的硅胶不仅有利于能量的均匀化，而且有利于冲击波的传播。聚氨酯薄膜比相同厚度的硅胶需要更多的能量。此外，还使用了不同重量级别的压边圈。压边圈越大越有利于提高冲裁质量。通过数值模拟，揭示了高、低脉冲能量下的典型变形阶段和不同的变形行为。模拟结果表明，在较低的能量下，断裂模式发生了变化。
The aim of this paper is to fabricate micro-gears via laser shock punching with Spitlight 2000 Nd-YAG Laser, and to discuss effects of process parameters namely laser energy, soft punch properties and blank-holder on the quality of micro-gears deeply. Results show that dimensional accuracy is the best shocked at 1690 mJ. Tensile fracture instead of shear fracture is the main fracture mode under low laser energy. The soft punch might cause damage to punching quality when too high energy is employed. Appropriate thickness and hardness of soft punch is necessary. Silica gel with 200 µm in thickness is beneficial to not only homogenize energy but also propagate the shock wave. Polyurethane films need more energy than silica gel with the same thickness. In addition, blank-holders with different weight levels are used. A heavier blank-holder is more beneficial to improve the cutting quality. Furthermore, the simulation is conducted to reveal typical stages and the different deformation behavior under high and low pulse energy. The simulation results show that the fracture mode changes under lower energy.