摘要
为降低透明塑料焊接的成本并简化焊接流程,利用热塑性塑料能吸收1710 nm激光的特性,使用该波长的激光器对透明聚甲基丙烯酸甲酯(PMMA)塑料进行了无添加吸收剂的焊接试验研究。对焊缝形貌、焊接强度及焊接过程中的物理现象进行了分析,通过调整焊接工艺参数,总结了试验激光热输入对焊接接头力学性能和形貌的影响。试验结果表明,当热输入为1.25 J/mm时,PMMA焊接试样的剪切力最大,超过了20.55 MPa,但焊缝中存在烧焦点;当热输入为1.11 J/mm时,焊接试样形貌理想,焊缝剪切力超过了17.8 MPa。
In order to reduce cost of transparent plastic welding and simplify its welding process, characteristic of thermoplastics absorbing 1 710 nm laser was utilized and welding experiment of transparent polymethyl methacrylate(PMMA) plastic without absorbent was carried out with this wavelength laser. Weld morphology, welding strength and physical phenomena in welding process were analyzed. Influence of laser heat input on mechanical properties and appearance of welded joints in this experiment was summarized by adjusting welding parameters. The experimental results showed that when heat input was 1.25 J/mm, shear force of PMMA welded samples was the largest and exceeded 20.55 MPa, but there was some burning points in the weld. When heat input was 1.11 J/mm, appearance of welded samples was ideal, and shear force of weld exceeded 17.8 MPa.
作者
曲兆展
蔡令波
谢良越
王剑磊
孟宪风
王春
Qu Zhaozhan;Cai Lingbo;Xie Liangyue;Wang Jianlei;Meng Xianfeng;Wang Chun(Center for Optics Research and Engineering,Shandong University,Qingdao 266237,Shandong,China)
出处
《焊接》
北大核心
2022年第12期44-48,共5页
Welding & Joining
关键词
激光焊
透明塑料
热输入
力学性能
形貌
laser welding
transparent plastic
heat input
mechanical properties
morphology
