超音频脉冲MIG焊接参数对5A06铝合金焊缝成形的影响
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摘要
采用超音频脉冲MIG焊对5A06铝合金进行了焊接试验,研究了超音频频率和占空比对焊缝成形的影响规律。结果表明,与常规脉冲MIG焊相比,超音频脉冲MIG焊能增加焊缝背面熔宽,正面熔宽变化不大,焊缝背面熔宽/正面熔宽比至少提高90%;在平均电流恒定的条件下,超音频频率为20 kHz时,焊缝成形效果更好;超音频频率为20k Hz时,随着占空比从20%变化到50%,正面熔宽变化幅度不大,背面熔宽和背面熔宽/正面熔宽比均先增大后减小,占空比为40%时,背面熔宽/正面熔宽比达到峰值。
The ultra-high frequency pulsed MIG welding tests of 5A06 aluminum alloy were carried out, and the influence of ultra-high frequency and duty ratio on the weld formation was studied. The results show that compared with the conventional pulsed MIG welding, the ultra-high frequency pulsed MIG welding can increase the weld back width, while the weld front width changes little and the ratio of weld back width to weld front width increases by at least 90%. Under the condition of constant average current, when the ultra-high frequency is 20 kHz, the weld formation is better. When the ultra-high frequency is 20 kHz, with the duty ratio changing from 20% to 50%, the weld front width changes little, the back width and the ratio of back width to front width increase first and then decrease, and the ratio of back width to front width reaches the peak value when the duty ratio is 40%.
The ultra-high frequency pulsed MIG welding tests of 5A06 aluminum alloy were carried out, and the influence of ultra-high frequency and duty ratio on the weld formation was studied. The results show that compared with the conventional pulsed MIG welding, the ultra-high frequency pulsed MIG welding can increase the weld back width, while the weld front width changes little and the ratio of weld back width to weld front width increases by at least 90%. Under the condition of constant average current, when the ultra-high frequency is 20 kHz, the weld formation is better. When the ultra-high frequency is 20 kHz, with the duty ratio changing from 20% to 50%, the weld front width changes little, the back width and the ratio of back width to front width increase first and then decrease, and the ratio of back width to front width reaches the peak value when the duty ratio is 40%.
引文
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[11] Qi B J, Yang M X, Cong B Q, et al. The effect of arc behavior on weld geometry by high-frequency pulse GTAW process with0Cr18Ni9Ti stainless steel[J]. International Journal of Advanced Manufacturing Technology, 2013, 66(9-12):1545-1553.
[12] Yang Mingxuan, Yang Zhou, Cong B, et al. A study on the surface depression of the molten pool with pulsed welding[J].Welding Journal, 2014, 93(8):312-319.
[2]沙德尚,廖晓钟.双脉冲MIG/MAG焊全数字控制策略[J].北京理工大学学报,2009,29(7):605-606.
[3]王晶.焊接技术应用展望[J].现代焊接,2010(1):6-7.
[4] Wang F, Hou W K, Hu S J, et al. Modelling and analysis of metal transfer in gas metal arc welding[J]. Journal of Physics D:Applied Physics, 2003,36(9):1143.
[5] Lancaster J F.The physics of welding[J].Physics in Technology,1984,15(2):73.
[6] Kah P,Suoranta R,Martikainen J. Advanced gas metal arc welding processes[J]. International Journal of Advanced Manufacturing Technology,2013,67(4):655-674.
[7] Praveen P,Yarlagadda Prasad K D V,Kang M J. Advancements in pulse gas metal arc welding[J]. Journal of Materials Processing Technology,2005,164-165(20):1113-1119.
[8] Sebastian J, Martin H, Uwe F, et al. Three-dimensional modelling of the GMAW process using time-dependent electrode shapes from experimental observations[C]//The International Symposiumon Visualization in Joining&Welding Science through Advanced Measurements and Simulation.Japan,2014.
[9] Yang Mingxuan, Qi Bojin, Cong Baoqiang, et al. Study on electromagnetic force in arc plasma with UHFP-GTAW of Ti-6Al-4V[J]. IEEE Transactions on Plasma Science, 2013, 41(9):2561-2568.
[10] Yang Mingxuan,Yang Zhou, Qi Bojin. The effect of pulsed frequency on the plasma jet force with ultra high-frequency pulsed arc welding[J]. Welding in the World, 2015, 59(6):1-8.
[11] Qi B J, Yang M X, Cong B Q, et al. The effect of arc behavior on weld geometry by high-frequency pulse GTAW process with0Cr18Ni9Ti stainless steel[J]. International Journal of Advanced Manufacturing Technology, 2013, 66(9-12):1545-1553.
[12] Yang Mingxuan, Yang Zhou, Cong B, et al. A study on the surface depression of the molten pool with pulsed welding[J].Welding Journal, 2014, 93(8):312-319.