摘要
对异种塑料聚碳酸酯和聚苯醚激光透射焊接性能进行了研究,分析了温度属性和相容性对可焊性的影响;采用半导体激光器进行激光透射焊接实验,采用电子万能试验机测定接头拉伸剪切强度,并用响应面法对焊接工艺参数进行实验设计建模与优化;采用三维显微镜对断面形貌进行观测,分析不同扫描速度下接头失效形式。结果表明,在激光功率为6.34 W、扫描速度为40 mm/s、夹紧力为0.39 MPa时,能获得最佳的焊接强度为6.51 MPa,当能量输入密度不同时,上下层材料的熔融结合作用程度和焊接缺陷(烧蚀和气泡)是影响接头力学性能和失效形式的主要因素。利用激光透射焊接技术,可以对异种塑料实现较好的焊接效果。
Laser transmission welding properties between two dissimilar polymers-polycarbonate and polyphenylene oxide are studied. The influence of temperature properties and compatibility on the weld ability are investigated. Diode laser and tensile machine are used for the welding and tensile-shear test respectively. The process parameters are designed and optimized through response surface methodology. Failure forms of weld joint under different scanning velocities are investigated by observing the fracture morphology through a 3D microscope. The results show that under the condition of 6.34 W power, 40 mm/s scanning velocity, 0.39 MPa clamp pressure, the best tensile-shear strength is 6.51 MPa. The compatibility between two melting polymers and the welding defects （ablation and voids） are the major factors that determine the mechanical properties and failure form of the joints. Dissimilar polymers are weldable by laser transmission welding.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2015年第5期139-145,共7页
Chinese Journal of Lasers
基金
国家自然科学基金(51275219)
江苏省高校自然科学研究面上项目(14KJB460006)
关键词
激光技术
异种塑料焊接
激光透射焊接
聚碳酸酯
聚苯醚
响应面法
失效形式
laser technique
welding of dissimilar polymers
laser transmission welding
polycarbonate
polyphenylene oxide
response surface methodology
failure forms
