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| 汽车仪表盘黑色塑料激光透射焊接研究 |
| Research on Laser Transmission Welding of Black Car Dashboards Thermoplastic Polyurethane Plastic |
| Received:March 25, 2021 |
| DOI：10.3969/j.issn.1674-6457.2021.04.023 |
| 中文关键词: 黑色塑料 聚氨酯 黑色有机染料 激光焊接 |
| 英文关键词: black plastic polyurethane black organic dye laser welding |
| 基金项目:陕西省职业技术教育学会2019年度职业教育研究课题(SZJYB19-94) |
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| 中文摘要: |
| 目的 研究汽车仪表盘黑色塑料的焊接方法，提高焊缝强度，满足实际生产。方法 在热塑性聚氨酯塑料的注塑过程中，加入一定比例的黑色有机染料，分析添加不同质量分数的黑色有机染料对透光率的影响。采用激光作为加热热源对黑色热塑性聚氨酯塑料进行焊接。结果 当添加的黑色有机染料质量分数为10%时，得到焊缝表面无痕迹，焊缝强度为131 MPa。随着添加黑色有机染料的比例增加，塑料对可见光的透光率基本没有变化，对915 nm的近红外光透光率逐渐增加。焊缝熔深和宽度均较大，且焊缝内部无气孔时，焊缝的剪切强度达到最大。结论 通过在黑色塑料中添加黑色有机染料，实现了汽车仪表盘的激光透射焊接，达到了实际生产的要求。 |
| 英文摘要: |
| The welding method of black plastic in automobile instrument panel was studied to improve the weld strength and meet the practical production. A certain amount of black organic dye was added into thermoplastic polyurethane plastic, and the transmittance for adding different ratio of black organic dye into the polyurethane was analyzed. Laser was used as heating source for the welding experiment of black thermoplastic polyurethane plastic. When the adding ratio of black organic dye was (wt) 10%, the appearance of welds was no trace and the shearing strength was 131 MPa. As the adding ratio of black organic dye increased, the transmittance for visible light basically had no changed, but the transmittance for near infrared band of 915 nm increased gradually. When the depth and width of the welds were large and had no pores in it, the shear strength of the weld reached to the maximum. By adding black organic dye into black plastic, the laser transmission welding of automobile instrument panel was realized, which met the requirements of practical production. |
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