Journal of Mechanical Engineering >

2018 , Vol. 54 >Issue 10: 78 - 84

DOI: https://doi.org/10.3901/JME.2018.10.078

Study on the Back Formation of Root Welding by MAG-TIG Twin-arc Welding in Thick Plate

  • ZHOU Yanbin ,
  • SHI Jipeng ,
  • LIU Liming
Expand
  • School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024

Received date: 2017-06-22

  Revised date: 2017-12-21

  Online published: 2018-05-20

Fold

Abstract

Backing welding is a key procedure in thick plate multi-pass welding and has a crucial impact on the performance of weld joints. Due to the low degree of automation and low production efficiency for back welding, among shipbuilding, marine engineering, heavy machinery and other industries, the metal active gas-tungsten inert gas (MAG-TIG) twin-arc tandem root welding process on thick plate with 20 mm is carried out, welding process and weld seam forming mechanism are investigated. Furthermore, arc plasma behaviors and molten pool state are studied during interaction between metal active gas (MAG) arc and tungsten inert gas (TIG) arc plasma. The results indicate that TIG arc has regulation effect on MAG arc heat distribution when arc discharges. Combined with arc plasma behaviors and molten pool state, a result can be found that, when the bead back formation is optimum, TIG arc accelerates the weld pool to flow backwards. Thus the quantity of liquid metal is reduced at the bottom of the molten pool and at the blunt edge of the plate. At this condition, molten pool with balance stress and steady state is obtained, and a sound, uniform and stable surface appearance back weld is acquired.

Key words： MAG-TIG double arc tandem welding; mild steel thick plate; root/backing welding; one-side welding with back formation; high efficient welding

Cite this article

ZHOU Yanbin , SHI Jipeng , LIU Liming . Study on the Back Formation of Root Welding by MAG-TIG Twin-arc Welding in Thick Plate[J]. Journal of Mechanical Engineering, 2018 , 54(10) : 78 -84 . DOI: 10.3901/JME.2018.10.078

References

[1] 马晓丽,华学明,沈甘迪,等. 高效弧焊设备与方法在船舶制造中的应用现状[J]. 焊接技术,2008,37(1):1-4. MA Xiaoli,HUA Xueming,SHEN Gandi,et al. Application status of highly efficient arc welding equipments and methods in shipbuilding[J]. Welding Technology,2008,37(1):1-4.
[2] 陈彦宾,冯杰才,李俐群. 高强钢厚板激光-GMAW复合双面同步横焊特性研究[J]. 机械工程学报,2016,52(2):47-55. CHEN Yanbin,FENG Jiecai,LI Liqun. Research on the characteristics of double-sided hybrid laser-GMAW synchronous horizontal welding of high-strength thick steel plates[J]. Journal of Mechanical Engineering,2016,52(2):47-55.
[3] 刘殿宝,张广军,吴林. 大厚板双面双TIG电弧打底焊熔池成形特性[J]. 焊接学报,2012,33(3):37-40. LIU Dianbao, ZHANG Guangjun, WU Lin. Characteristics of pool formation in backing weld for large and thick plates using double-sided double TIG arc welding[J]. Transactions of the China Welding Institution,2012,33(3):37-40.
[4] 杨东青,李大用,张广军. 坡口预留间隙对高强度钢厚板打底焊缝成形的影响[J]. 焊接学报,2015,36(11):57-60. YANG Dongqing,LI Dayong,ZHANG Guangjun. Effect of reserved groove gap on backing welding of high-strength steel thick plates[J]. Transactions of the China Welding Institution,2015,36(11):57-60.
[5] KIM C. Back bead characteristics during butt welding of a thick plate for various backing conditions[J]. Materials Science Forum,2010,654(6):350-353.
[6] SUGITANI Y,MAO W. Automatic simultaneous control of bead height and back bead shape utilizing arc sensor in semi-automatic MAG welding with backing plate[J]. Quarterly Journal of the Japan Welding Society,1994,12(4):468-476.
[7] YAMANE S,YAMAMOTO H,ISHIHARA T,et al. Adaptive control of back bead in V groove welding without backing plate[J]. Science and Technology of Welding and Joining,2004,9(2):138-148.
[8] YAMANE S,YAMAMOTO H,KANEKO Y,et al. Sensing and seam tracking of welding line in backingless V groove welding[J]. Science and Technology of Welding and Joining,2006,11(5):586-592.
[9] YAMANE S,UJI K,NAKAJIMA T,et al. Application of switch back welding to V groove MAG welding[J]. Welding International,2015,29(2):103-109.
[10] YANG Chengdong,ZHONG Jiyong,CHEN Yuxi,et al. The realization of no back chipping for thick plate welding[J]. International Journal of Advanced Manufacture and Technology,2014,74(1):79-88.
[11] ZHANG Huajun,ZHANG Guangjun,CAI Chunbo,et al. Fundamental studies on in-process controlling angular distortion in asymmetrical double-sided double arc welding[J]. Journal of Materials Processing Technology,2008,205(1):214-223.
[12] WATANABE T,NAGAI Y,KITAZAWA Y K. Back bead control system for gas shielded arc one side welding[J]. Research and Development Kobe Steel Engineering Reports,1987,37(4):77-80.
[13] WU Chuansong,JIA Chuanbao,CHEN Maoai. A controlsystem for keyhole plasma arc welding of stainless steel with medium thickness[J]. Welding Journal,2010,89(11):225s-231s.
[14] WAHBA M,MIZUTANI M,KATAYAMA S. Single pass hybrid laser-arc welding of 25 mm thick square groove butt joints[J]. Materials and Design,2016,97(5):1-6.
[15] LI Kehai,ZHANG Yuming. Consumable doubleelectrode GMAW part I:the process[J]. Welding Journal,2008,87(1):11s-17s.
[16] KANEMARU S,SASAKI T,SATO T,et al. Study for TIG-MIG hybrid welding process[J]. Welding in the World,2014,58(1):11-18.
[17] MENG Xiangmeng,QIN Guoliang,ZHANG Yuqi,et al. High speed TIG-MAG hybrid arc welding of mild steel plate[J]. Journal of Materials Processing Technology,2014,214(11):2417-2424.
[18] 杨涛,张生虎,高洪明,等. TIG-MIG复合焊电弧特性机理分析[J]. 焊接学报,2012,33(7):25-28. YANG Tao,ZHANG Shenghu,GAO Hongming,et al. Analysis of mechanism for TIG-MIG hybrid arc properties[J]. Transactions of the China Welding Institution,2012,33(7):25-28.
[19] MIAO Yugang,XU Xiangfang,WU Bintao,et al. Effects of bypass current on the stability of weld pool during double sided arc welding[J]. Journal of Materials Processing Technology,2014,214(8):1590-1596.
[20] 王新鑫,樊丁,黄健康,等. TIG焊电弧-熔池传热与流动数值模拟[J]. 机械工程学报,2015,51(10):69-78. WANG Xinxin,FAN Ding,HUANG Jiankang,et al. Numerical simulation of heat transfer and fluid flow for arc-weld pool in TIG welding[J]. Journal of Mechanical Engineering,2015,51(10):69-78.
[21] 彭远江,马崇山. 手工电弧焊单面焊双面成形的机理及成形控制的探讨[J]. 焊接技术,1989,18(5):37-41. PENG Yuanjiang,MA Chongshan. Discussion on the mechanism and forming control of single side welding of manual arc welding[J]. Welding Technology,1989,18(5):37-41.
[22] 周方明,于治水,王宇,等. TIG-MIG双面对称焊焊缝成形机理研究[J]. 机械工程学报,2004,40(4):58-61. ZHOU Fangming,YU Zhishui,WANG Yu,et al. Study on shaping mechanism of weld for TIG-MIG double-sided symmetric arc welding[J]. Chinese Journal of Mechanical Engineering,2004,40(4):58-61.
[23] 陈姬,宗然,武传松,等. TIG-MIG复合焊电弧间相互作用对焊接过程的影响[J]. 机械工程学报,2016,52(6):59-64. CHEN Ji,ZONG Ran,WU Chuansong,et al. Influence of arcs interaction on TIG-MIG hybrid welding process[J]. Journal of Mechanical Engineering,2016,52(6):59-64.
[24] SAHOO P,DEBROY T,MCNALLAN M J. Surface tension of binary metal-surface active solute systems under conditions relevant to welding metallurgy[J]. Metallurgical Transactions B,1988,19(3):483-491.
[25] ZHAO Y Z,ZHAO H Y,LEI Y P,et al. Theoretical study of Marangoni convection and weld penetration under influence of high oxygen content in base metal[J]. Science and Technology of Welding and Joining,2007,12(5):410-417.
[26] 赵琳,塚本进,荒金吾郎,等. 激光-电弧复合焊接保护气体O2含量对焊缝均匀性和熔池流动的影响[J]. 中国激光,2015,42(6):130-136. ZHAO Lin,TSUKAMOTO Susumu,ARAKANE Goro,et al. Influence of shielding oxygen content on weld homogeneity and fluid flow in laser-arc hybrid welding[J]. Chinese Journal of Lasers,2015,42(6):130-136.
Options
Outlines

/

〈 〉

　 Copyright © Journal of Mechanical Engineering, All Rights Reserved.
Powered by Beijing Magtech Co. Ltd,.