聚丙烯塑料激光透射焊接工艺

利用正交实验方法,研究了聚丙烯(PP)塑料的激光透射焊接工艺参数对焊接质量的影响。对焊接样品进行拉伸测试和切片实验,分析了各焊接因素对拉伸强度和焊缝宽度的影响。结果表明,各焊接因素对焊接强度的影响大小顺序为:焊接速度→激光器的频率→焊接后冷却时间→夹具的夹紧力→光斑直径→激光器功率,并发现激光能量密度过高会导致样品表面焦化形成黑色焊缝,焊缝不均匀则产生伪断裂现象。并用极差法确定了聚丙烯的最佳焊接工艺参数。

Laser Transmission Welding Polypropylene Plastics

The influence of laser transmission welding parameters for polypropylene (PP) plastics on welding quality is investigated by orthogonal design method. Tensile and section tests are conducted for experimental samples, and the influence of welding factors on tensile strength and welding seam size is analyzed, which indicates subsequence of the influence of welding parmeters on PP plastics is welding velocity→laser frequency→cooling time→fixture pressure→beam diameter on the material→laser power. And high laser power density can cause resulting from coking on samples′ faces black welding line and fake fracture appears when welding seam is not even. The optimized welding parameters are determined by using range method.