激光技术, 2007, 31 (6): 0639, 网络出版: 2010-06-03   

金属板料激光冲孔成形技术研究

Study on sheet metal punched by laser shock waves
作者单位
江苏大学 机械工程学院,镇江 212013
摘要
为了验证激光冲击波冲孔工艺的可行性,采用Nd玻璃高功率脉冲激光器在0.4mm厚锻铝合金板料上进行冲孔试验。推导出激光冲孔工艺中板料脱离时所需理论最小板料运动速度,分析了激光冲击波冲孔技术的机理及其特点。结果表明,激光冲击波冲孔后,孔周围材料未发生扭曲变形、孔口光滑。激光冲孔技术为孔成形工艺提供了全新的加工方法。
Abstract
Laser punching technique is a new idea about hole-forming of sheet metal which is based on the effects of shock waves induced by laser and the high speed punching process. The theoretical minimum movement velocity for the sheet to be punched by laser shock waves was deduced. Also,the mechanism and the punching properties was analyzed on the basis of laser shock forming technology. To test the feasibility of laser punching,a corresponding experiment was designed. In the experiment,a neodymium glass high-power laser was adopted to irradiate the black coating painted on the surface of the 0.4mm thick aluminum sheet through the overlay-K9 glass,and the coating was gasified immediately into high-pressure plasma to generate a hole in the sample. The experimental results show there is no obvious distortion around the hole;the edge of hole is smooth;and the size of hole is dependent on the concave die. So,the laser punching technique can be used as an effective method for hole-forming.

史建国, 张永康, 顾永玉, 张兴权. 金属板料激光冲孔成形技术研究[J]. 激光技术, 2007, 31(6): 0639. SHI Jian-guo, ZHANG Yong-kang, GU Yong-yu, ZHANG Xing-quan. Study on sheet metal punched by laser shock waves[J]. Laser Technology, 2007, 31(6): 0639.

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