摘  要：激光焊接工艺已大规模出现在汽车制造产业，成为汽车制造业的突出成就之一。在汽车电子生产过程中，激光焊接工艺逐渐运用于汽车电子传感器的密封之中。在汽车电子传感器生产过程中，发现焊接完成后成品焊接强度不稳定，无法满足产品质量要求。经分析研究，焊接强度主要由焊接功率、焊接压力、焊接速度和冷却时间等工艺参数决定。本文采用试验设计方法（Design of Experiment，DOE），以焊接强度高和焊接时间短为试验的主要指标，选取以焊接功率、焊接压力、焊接速度和冷却时间作为影响因子，运用L9正交试验方法设计试验方案，通过现场激光焊接机对9组试验方案进行样品制作，并对焊接强度与焊接时间进行分析，获得最佳的焊接工艺参数为焊接功率为150W、焊接压力为1500N、焊接速度为210mm/s、冷却时间为1s。将最优参数运用到生产中，结果显示采用DOE方法对激光焊接工艺参数进行优化，提高了汽车电子雷达传感器的焊接强度，同时也减少了焊接时间，提高了生产效率。

关键词：汽车电子传感器;焊接强度;焊接时间;DOE;正交试验

中图分类号：TG44;TG456.7     文献标识码：A 文章编号：2096-4706（2019）12-0165-03

Abstract：Laser welding technology has appeared in the automobile manufacturing industry on a large scale，and has become one of the outstanding achievements of the automobile manufacturing industry. In the process of automotive electronic production，laser welding technology is gradually applied to the sealing of automotive electronic sensors. In the process of automotive electronic sensor production，it is found that the welding strength of finished products after welding is unstable and can not meet the product quality requirements. Through analysis and research，the welding strength is mainly determined by welding power，welding pressure，welding speed，cooling time and other process parameters. In this paper，the design of experiment（DOE） method is used to design the acting scheme，taking the high welding strength and short welding time as the main indicators，selecting the welding power，welding pressure，welding speed and cooling time as the influencing factors，using L9 orthogonal test method to design the acting scheme，making nine groups of test schemes by on-site laser welding machine，and strengthening the welding. The analysis of degree and welding time shows that the optimum welding parameters are welding power 150W，welding pressure 1500N，welding speed 210mm/s and cooling time 1s. The optimal parameters are applied to production. The results show that the DOE method is used to optimize the laser welding parameters，which improves the welding strength of automotive electronic radar sensor，reduces the welding time and improves the production efficiency.

Keywords：automobile electronic sensor;welding strength;welding time;DOE;orthogonal test

0  引  言

随着激光焊接在汽车电子传感器组装生产中的广泛使用，焊接强度会直接影响汽車电子传感器的质量，因此焊接强度低是生产过程中需要重点解决的问题。影响焊接强度不良的因素有很多，包括焊接功率、焊接压力、焊接速度和冷却时间等。选择合理的焊接工艺参数是提高焊接质量的主要方法之一。……