摘要
激光塑料焊接可以极大提高产品的品质,塑料产品采用激光焊接的需求将越来越多。影响塑料焊接的工艺参数较多,一般需要正交试验法等进行大量的试验才能得到最佳工艺参数。针对热塑性ABS塑料进行激光透射焊接试验,对激光功率、焊接速度和离焦量进行单因素试验,分析工艺参数对焊接效果的影响规律,功率密度测试剪切强度表明,焊缝剪切强度随着功率密度的增加呈现先增加后降低的规律。进一步对焊缝微观结构分析,当激光功率密度L小于或者大于1.6 W/mm^(2)时,焊缝为脆性断裂,焊缝剪切强度较低;当激光功率密度L为1.6 W/mm^(2)时,焊缝为韧性断裂,剪切强度达到最高的71 MPa。研究结果表明,通过激光功率密度这一单因素对焊缝微观结构有直接的影响,进而影响焊缝剪切强度。
Laser plastic welding could improved the quality of products greatly, so the demand of laser plastics welding would be more and more. There are many process parameters affecting plastic welding, and lots of experiments such as orthogonal experiment were required to test for getting the best process parameters. In this paper, laser transmission welding testing for thermoplastic ABS plastic was carried out. Single factor experiments of laser power, welding speed and focal distances were used to analyze the regular of welding effects. Then power density was used to research shear strength and microcosmic. When power density was less or more than 1.6 W/mm^(2), the welds was brittle fracture, shear strength was weak. When power density was 1.6 W/mm^(2), the welds was ductile fracture, and shear strength was reached to the highest of 71 MPa. The analysis results showed that, single factor of laser power density had direct effect on the microcosmic of welds and then effect on the shear strength.
作者
仝源
靳兆文
徐艳
Tong Yuan;Jin Zhaowen;Xu Yan(Nanjing Polytechnic Institute,Nanjing,Jiangsu 210048,China)
出处
《应用激光》
CSCD
北大核心
2021年第1期131-135,共5页
Applied Laser
基金
南京科技职业学院科研项目(NHKY-2020-07)。
关键词
ABS塑料
激光焊接
工艺研究
微观结构
剪切强度
ABS thermoplastic
laser welding
process research
microcosmic
shear strength
