Digital High-power AC-Pulse Submerged Arc Welding Power Source

doi:10.3901/JME.2023.02.096

Abstract

Abstract: In order to improve the welding quality of submerged arc welding, combining the advantages of pulse welding and AC welding, a welding method of AC-Pulse submerged arc welding is proposed, and a high-power AC-Pulse submerged arc welding power source is developed. The power conversion circuit is designed in parallel with two main circuits, which can achieve 1250A AC pulse current output. The secondary circuit adopts coupling inductance structure to accelerate the speed of AC zero-crossing and improve the stability during polarity switching. A digital control system with STM32F405RGT6 chip as the core is built. Through the multi-characteristic digital current sharing strategy, the reliable current sharing of dual main circuits and the stable output of various current waveforms are realized. The discrete incremental PID algorithm is used to improve the dynamic response performance. The process test results show that under the same welding conditions and AC parameters, compared with AC square wave submerged arc welding, AC-Pulse submerged arc welding can obtain larger weld depth and weld width and smaller weld grains.

Key words: submerged arc welding, variable polarity pulse, digital welding power source, multi-channel current sharing

CLC Number:

TG439

WANG Zhenmin, TANG Jiajian, PAN Xiaohao, RAO Jie, LIN Sanbao, XU Mengjia. Digital High-power AC-Pulse Submerged Arc Welding Power Source[J]. Journal of Mechanical Engineering, 2023, 59(2): 96-103.

References

[1] AHMAD M A, SHEIKH A K, NAZIR K. Design of experiment based statistical approaches to optimize submerged arc welding process parameters[J]. ISA Transactions, 2019, 94:307-315.
[2] LI K, WU Z, ZHU Y, et al. Metal transfer in submerged arc welding[J]. Journal of Materials Processing Tech., 2017, 244:314-319.
[3] 孙咸. 极性对埋弧焊工艺质量的影响[J]. 电焊机, 2018, 48(5):1-8. SUN Xian. Influence of electrode polarity on the usability quality of submerged arc welding[J]. Electric Welding Machine, 2018, 48(5):1-8.
[4] 王占英, 李桓, 梁建明, 等. 脉冲埋弧焊接头力学性能分析[J]. 焊接学报, 2009, 30(2):107-110. WANG Zhanying, LI Huan, LIANG Jianming, et al. Analysis of mechanical properties of pulse submerged arc welding joint[J]. Transactions of The China Welding Institution, 2009, 30(2):107-110.
[5] WANG Zhenmin, JIANG Donghang, WU Jianwen, et al. A review on high-frequency pulsed arc welding[J]. Journal of Manufacturing Processes, 2020, 60:503-519.
[6] 齐铂金, 王义朋, 王曲. 快变换交流方波埋弧焊电源研制[J]. 航空制造技术, 2016(17):67-70, 76. QI Bojin, QANG Yipeng, WANG Qu. Study on submerged arc welding power source with high commutation rate AC square-wave[J]. Aeronautical Manufacturing Technology, 2016(17):67-70, 76.
[7] 钟启明, 谢芳祥, 王振民. 新型双脉冲MIG焊接电源[J]. 焊接学报, 2019, 40(7):94-99. ZHONG Qiming, XIE Fangxiang, WANG Zhenmin. New double pulse MIG welding power source[J]. Transactions of The China Welding Institution, 2019, 40(7):94-99.
[8] 王振民, 张福彪, 王鹏飞, 等. 全数字机器人VPPA焊接电源[J]. 焊接学报, 2017, 38(7):5-8. WANG Zhenmin, ZHANG Fubiao, WANG Pengfei, et al. Digital robot VPPA welding power supply[J]. Transactions of The China Welding Institution, 2017, 38(7):5-8.
[9] 黄石生, 何宽芳, 孙德一, 等. 数字化控制的埋弧自动焊装备的研制[J]. 华南理工大学学报(自然科学版), 2008, 36(8):69-74. HUANG Shisheng, HE Kuangfang, SUN Deyi, et al. Development of automatic submerged arc welding equipment with digital control[J]. Journal of South China University of Technology(Natural Science Edition), 2008, 36(8):69-74.
[10] CHO D W, SONG W H, CHO M H, et al. Analysis of submerged arc welding process by three-dimensional computational fluid dynamics simulations[J]. Journal of Materials Processing Tech., 2013, 213(12):2278-2291.
[11] MENDEZ P F, GOETT G, GUEST S D. High speed video of metal transfer in submerged arc welding[J]. Welding Journal, 2015, 94(10):326-333.
[12] 王朋, 刘霞, 芦凤桂. 深窄间隙焊接技术在大厚度构件材料焊接中的应用研究[J]. 机械工程学报, 2016, 52(2):56-61. WANG Peng, LIU Xia, LU Fenggui. Application of deep-narrow gap welding method in manufacturing component with heavy section[J]. Journal of Mechanical Engineering, 2016, 52(2):56-61.
[13] SRIDHAR P V S S, BISWAS P, MAHANTA P. Influence of welding current on bead profile and mechanical properties of double sided submerged arc welding of AISI 304 austenitic stainless steel[J]. Materials Today:Proceedings, 2019, 19:831-836.