【摘要】 随着产品轻量化的发展要求,塑料激光焊接以其优良的焊接质量、易于控制、可焊接微小零件等诸多优点成为人们研究的热点.利用波长为808 nm的半导体激光器,采用吸收剂Clearweld对聚丙烯(PP)进行了激光透射焊接,讨论了激光功率、焊接速度、夹紧力和吸收剂等工艺因素对其焊接质量的影响.结果表明,在有夹紧力夹持、且激光光斑大小一定的情况下,焊接热输入存在一个最佳范围以获得良好的焊缝成形和接头强度.更多还原

【Abstract】 With the development requirements of product lightweight, laser transmission welding of plastics is becoming a research focus, since it has good welding quality, controllability and is able to weld tiny parts. This paper discussed the effects of welding process factors, such as laser power, welding speed, clamping force and absorbent, on laser transmission welding of PP, using an 808 nm semiconductor laser. The shear strength of the joint was tested and the microstructure was examined after welding. The experimental results show that there was a proper range for welding heat input to obtain good weld formation and joint strength while keeping the clamping force and laser spot size constant.更多还原