环形激光束形成及高分子材料焊接性能的研究

发布时间：2018-04-23 19:56

本文选题：材料 + 光纤激光　；参考：《中国激光》2015年09期

【摘要】：利用光纤激光研究了环形激光束的形成原理,并利用环形激光束实现了高分子材料的超高速焊接。试验结果表明,随着准直镜焦距的增加,环形激光束的外径不变,内径减小,环形激光束的光环宽度增加;随着第一枚圆锥透镜和第二枚圆锥透镜的间距L12增加,环形激光束的内径和外径同时增加,而环形激光束的光环宽度几乎不变;通过准直镜、第一枚圆锥透镜及第二枚圆锥透镜的同轴性调节,可获得能量密度分布均匀的环形激光束;利用外部直径为54 mm、内部直径为47 mm及宽度为3.5 mm的环形激光束,对厚度为(2+1)mm的高分子材料搭接接头实现了超高速焊接。当试验压力为100 N,激光输出功率为800 W,焊接时间为0.6 s时,高分子材料焊接接头拉伸剪切性能与母材相同,其拉伸剪切断口位于母材(TPV-弹性体)上。
[Abstract]:The forming principle of ring laser beam is studied by using fiber laser, and the super high speed welding of polymer material is realized by using ring laser beam. The experimental results show that with the increase of the focal length of the collimating mirror, the outer diameter of the ring laser beam remains the same, the inner diameter decreases, and the ring width of the ring laser beam increases, and with the increase of the distance between the first conical lens and the second conical lens, The inner and outer diameter of the ring laser beam increases simultaneously, while the ring width of the ring laser beam is almost unchanged; the coaxiality of the first conical lens and the second conical lens is adjusted by collimating mirror, The ring laser beam with uniform energy density distribution can be obtained. Using the annular laser beam with the outer diameter of 54 mm, the inner diameter of 47 mm and the width of 3.5 mm, the superhigh speed welding of the lap joint of polymer material with thickness of 2 1)mm is realized by using the ring laser beam with the outer diameter of 54 mm, the inner diameter of 47 mm and the width of 3.5 mm. When the test pressure is 100N, the laser output power is 800W and the welding time is 0.6 s, the tensile shear properties of the welded joints are the same as that of the base metal, and the tensile shear fracture is located on the base metal TPV-elastomer.
【作者单位】：沈阳工业大学材料科学与工程学院;鞍山煜宸科技有限公司;
【基金】：辽宁省科技创新重大专项计划(201411004)
【分类号】：TG665;TG456.7

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