摘要
透光-透光材料的激光透射焊接是塑料激光焊接领域的一大难点,解决此难题的关键之一在于吸收剂的正确选择和使用。采用炭黑、黑色聚丙烯颗粒、黑漆三种不同的吸收剂,对聚丙烯塑料的激光透射焊接工艺进行研究后发现:采用黑漆作为吸收剂时,能获得较美观的焊缝成形和较好的焊接质量。同时讨论了激光功率、焊接速度、材料板厚与黑漆层厚度等工艺参数对焊接质量的影响规律。并发现焊接过程中产生的气孔、热分解孔洞、表面燃烧等焊接缺陷,与原料纯度较低、能量输入过大有关。可通过选择合适的工艺参数、使用氩气保护等措施对这些缺陷进行控制。
Transparent-transparent plastic laser transmission welding is one of the toughest difficulties in the field of plastic laser welding. The key to solve this problem is to use the right absorber. The laser welding of transparent- transparent polypropylene technology is studied by using three kinds of absorbers： the carbon, the black polypropylene particles and the black paint. Welds with desirable property are obtained when using black paint as the absorber. The research also investigates the influence of welding parameters （laser power, welding speed, the thickness of sample and thickness of black paint layer） on the welding quality. It turns out that the appearances of welding defects, such as porosities, thermal deformation holes and surface combustions, are related to low purity of raw materials and excessive energy input. These defects can be taken into control by using proper welding parameters and argon gas.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2013年第12期50-57,共8页
Chinese Journal of Lasers
关键词
激光技术
透光塑料
激光透射焊接
吸收剂
工艺参数
laser technique, transparent-transparent plastic
laser transmission welding
absorber, technologicalparameters
