摘要
通过对有机玻璃与304不锈钢进行异种材料的搭接焊试验,研究了焊接过程中出现的物理现象及焊接缺陷。利用正交试验得到了优化的工艺参数组合,并获得了成形良好的焊接接头。分析了工艺参数对剪切应力的影响。研究结果表明,激光焊接速度、脉冲宽度、光斑大小和脉冲频率对剪切应力具有较大影响,焊接接头的最大剪切力为191N·mm-2。焊接缺陷和能量密度是导致焊接接头失效的主要因素。
By the experiment of the overlap welding of dissimilar materials for the polymethyl methacrylate and 304 stainless steels,the physical phenomena and weld defects during the welding process are analyzed.By the orthogonal tests,the optimized process parameter combination is obtained,and the well-formed weld joints are realized.The influences of the process parameters on the shear stress are analyzed.The study results show that the influences of laser welding speed,pulse width,spot size and pulse frequency on the shear stress are strong,and the maximum shear force of weld joints is 191 N·mm-2.The key factors determining the failure of weld joints are weld defects and energy densities.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2017年第12期89-96,共8页
Chinese Journal of Lasers
基金
国家自然科学基金(51675104)
广东省科技计划(2016A010102015)
广州市科技计划(201510010089)
关键词
激光技术
激光焊
塑料与金属
焊接缺陷
工艺参数
力学性能
laser technique
laser welding
plastics and metals
weld defects
process parameters
mechanical properties
