高密度聚乙烯塑料激光焊接工艺参量试验研究

为了研究激光焊接中各工艺参量对高密度聚乙烯塑料焊接件性能的影响,采用激光穿透焊接高密度聚乙烯试样件,进行了力学拉伸试验并应用扫描电镜观测其焊缝断口的形貌。试验结果表明,当光斑直径为2mm、激光功率为75W、焊接速度为2mm/s时,焊接件断口没有飞边和夹渣,焊接接头成型良好,力学性能最佳;随着激光光斑直径的减小、焊接速度的降低或功率的增加,接头强度及伸长率均有提高。进一步从激光体能量角度分析了影响接头强度的因素,证实了激光焊接高密度聚乙烯是一种可行的方法。

Study on Technical Parameter of Laser Welding HEPE Plastics

Abstract：Permeating weld HEPE by method of laser. Analyzed mechanics capability of welding joint by mechanical tensile test as well as morphology of joint fracture by SEM photo.Results show that joint fracture is good,while intensity of joints and elongation accrete when light spot and welding velocity fall down.So does it when laser power increases. And then analyzed some factors which impress joints intensity in view of laser volume energy. Confirmed welding HEPE by laser is a viable method.