高强铝合金恒熔深控制技术研究.docx

PAGE 13 高强铝合金恒熔深控制技术研究 摘要 　　目前薄板连接技术主要还是弧焊。脉冲MIG焊使用变动的脉冲电流进行焊接工作，具有较大的电流调节范围、接头性能良好和全位置焊接等优点，但是对于焊接参数的改变无法针对性的自我调节。PMC技术在脉冲MIG焊的基础上具备恒熔深功能，能够很好适应焊接参数的改变。本设计的主要内容是研究焊丝干伸长和焊接速度和焊接电流这三个参数，对PMC技术焊接出来工件焊缝参数以及焊接过程中的脉冲特性，分析PMC技术恒熔深的工艺，找到合适的工艺参数。 　　本实验过程中是使用FANUC焊接机器人进行脉冲MIG焊，福尼斯TPS320i焊接进行PMC焊接，采用5356焊丝焊接5mm 厚的5A06铝合金薄板。在实验过程中，焊前对母材表面进行清理，在保证其他工艺参数不变的情况下，分别制定焊丝干伸长和焊接速度两组实验。焊接完成后观察焊缝表面以及横截面熔深的情况；利用高速摄像分析系统导出熔滴过渡和电弧形态。研究三组参数对焊接的影响，最终确定最好的参数是110A,50cm/min。关键词 脉冲MIG焊 PMC 铝合金 焊丝干伸长 焊接速度 焊接电流 脉冲特性毕 业 设 计 外 文 摘 要 　　Title Arc welding process based on PMC Multi-pulse contron Research Abstract 　　Welding is a kind of permanent connection technology. At present, the thin plate connection technology is mainly arc welding. Pulsed MIG welding uses variable pulse current to conduct welding work, which has the advantages of large current regulation range, good joint performance and allposition welding, but it cannot be self-adjusted for the change of welding parameters. PMC technology has the function of constant penetration on the basis of pulse MIG welding, which can adapt to the change of welding parameters well. The main content of this design is to study the three parameters of dry wire elongation and welding speed and welding current, the PMC technology out of the workpiece welding parameters and the pulse characteristics of the welding process, analysis of PMC technology constant depth of penetration process, find the appropriate process parameters. 　　In this experiment, FANUC welding robot is used for pulse MIG welding, Phonis TPS320I welding for PMC welding, using 5356 welding wire welding 5A06 aluminum alloy sheet 5mm thick. During the experiment, the surface of the base metal is cleaned before welding. Under the condition that other process parameters remain unchanged, two groups of experiments, dry elongation of the wire and welding speed, are formulated respectively. Observe the welding surface and the depth of the section after welding; The voltage waveform and pulse p