激光加工中双工位加工系统的研究  

Research on Double-Station Processing System in Laser Processing

作　　者：张健[1] 吴锐欢[1] 李泽曦[1] 陈国[1] 张庆茂[1] 刘颂豪[1] 

机构地区：[1]华南师范大学广东省微纳光子功能材料与器件重点实验室,广东广州510006

出　　处：《中国激光》2013年第10期91-96,共6页Chinese Journal of Lasers

基　　金：国家863计划(2012AA040210);中央财政支持地方高校专项资金项目激光先进制造创新培养基地(510-C10293);广东省教育部产学研结合重点项目(2010A090200048);广东省教育厅学科建设专项(CXZD1139)

摘　　要：为满足多工位或多工种的激光加工需求，以Nd：YAG脉冲激光器为光源，提出了双工位加工的实施方案，设计出能实时改变激光光路的双工位分光装置，以及能对系统进行控制的系统控制电路，并确定了系统的工作流程及工作时序。最终实现与单工位时等功率输出的双工位系统。为检验实际加工效果，对Az91D镁合金和3003铝合金分别进行了熔覆和焊接试验，并利用扫描电子显微镜（sEM）和电化学测量系统分别检测熔覆试样的熔覆层与基体结合界面的特征及耐腐蚀性，同时对焊接试样的显微硬度及拉伸性能进行检测。结果表明，熔覆后，熔覆层与基体结合良好，熔覆层组织致密、无裂纹和孔洞，自腐蚀电位比基体提高1．18V，腐蚀电流降低约5个数量级；焊接后，铝合金的硬度变化范围为HV4.9 27～54，抗拉强度约为母材的82．3％，与单工位加工系统相比，加工效率提高了24．6％，取得了较好的加工效果。In order to meet the need of multi-station or multi-craft laser processing, with the Nd： YAG pulse laser as the optical source, a double-station processing system is developed. A double-station processing implementing scheme is proposed, and then a light-splitting device that can change the laser path in real time is designed. As well as a control circuit of the whole system, and the workflow, work time sequence of the system is worked out. Finally, a double-station system is realized, and it can provide the same output power as which of the single-station one. To test the processing result of the system, the cladding and welding experiments are respectively carried out on AZglD magnesium alloy and 3003 aluminum alloy. With the help of scanning electron microscope（SEM） and the measuring system of electrochemistry, the features and corrosion resistance of the interface between the coating of cladding sample and the substrate are tested respectively. Besides, the microhardness and tensile property of the welding sample are tested. The results show that after cladding, the clad layer integrates well with the substrate and is compact in texture without cracks or holes. The self-corrosion potential is higher than the substrate by 1.18V and corrosion current is lower by 5 orders of magnitude. It also shows that the processing results are quite good after welding, with the hardness of aluminum alloy varying from HV4927 to 54 and the tensile strength reaching 82.3 % of that of the parent metal. And the process efficiency is improved by 24. 6% compared with the single station processing system.

关 键 词：激光技术 双工位加工 激光加工 熔覆 焊接 

分 类 号：TG456.7[金属学及工艺—焊接]