超声交流TIG焊声场及电弧特性分析

目的研究复合焊接过程中,发射端高度、喷嘴高度及保护气流量等工艺参数对空气中声场强度的影响规律及作用机理。方法采用分组实验的方法,分析了各焊接工艺参数对声场强度的影响。结果研究结果表明:发射端高度及喷嘴高度对声场强度影响最大,保护气流量几乎无影响;不同发射端高度下,声场强度峰值所对应的喷嘴高度不同。结论通过对实验结果进行分析,得到了优化的焊接工艺参数:发射端高度为30 mm,喷嘴高度为11 mm,弧长为4 mm,电流为120A,保护气流量为25 mL/min;得出了交流复合超声TIG堆焊中,超声可细化组织并使组织均匀化。

Ultrasonic Alternative Current TIG Welding

Objective To research the effect rule and mechanism of the emission end height, nozzle height and shielding gas flow on the acoustic field intensity during the welding process. Methods A grouped experiment was carried out to analyze the effect of welding parameters on the acoustic field intensity. Results The results indicated that the emission end height and nozzle height had the greatest impact on the acoustic field intensity whereas the flux of shielding gas has no effect . With different emission end heights, the nozzle heights corresponding to the maximum of acoustic field intensity were different. Conclusion Through the analysis of the experimental results, the optimized parameters of welding process can be obtained: emission end height is 30 mm, nozzle height is 11 mm and the length of arc is 4mm; welding current is 120 A and the flux of shielding gas is 25 mL / min. Experiments of composite ultrasonic alternative current TIG bead welding shows that ultrasound can refine the organization and make the organization uniform.