A Study on Prediction of Welding Quality for Verticalposition Welding Using Mahalanobis Distance Method

Khairul Muzaka; Min-Ho Park; Jong-Pyo Lee; Byeong-Ju Jin; Do-Hyeong Kim; Ill-Soo Kim

Abstract

A vertical-position welding is generally defined as a weld that is applied to a vertical surface or one that is inclined 45 degrees or less. Arc welding on a vertical surface is much more difficult than welding in the flat or horizontal position due to the force of gravity which caused to welding faults. Furthermore, welding faults will effect decreasing the quality of the weld. Until now, arc welding process has been employed to an off-line method to detect welding fault. Also, it is quite difficult to increase the productivity as well as to reduce the production cost. To solve those problems, optimal algorithm for on-line monitoring system which based on Mahalanobis Distance (MD) method was proposed in this study. First, three different setting of Contact Tip to Working Distance (CTWD) were chosen 15, 20 and 25mm and found the optimal CTWD for automatic welding process. It was confirmed that MD verification based on optimized CTWD could be achieved the good welding quality and bead geometries which satisfied American Welding Association (AWS) standard.

Keywords

On-line monitoring system, Mahalanobis distance, Vertical welding, Welding quality, Fault weld.

Reference

[1] G. Yongdong, Z. Haiyan, Z. Hongzhou, The Application of automatic welding technology in West-to-East gas pipeline project, Oil Gas Storage Transp, 2013, 22(12): pp.53-55.

[2] Z. Huilin, W. Changjian, Y. Xuemei, W. Xinsheng, L. Ran, Automatic welding technologies for long-distance pipelines by use of all-position self-shielded flux cored wires, Natural Gas Industry, 2014, (1): pp. 113-118.

[3] H. Anxin, X. Su, S. Huafeng, Current situation of automatic welding of domestic long distance pipelines, Natural Gas Oil, 2006, 24(2): pp. 12-14.

[4] W. Rui, R. Guo, Developments of Automatic Girth Welding Technology in pipelines, Electr Weld Mach, 2011, 41(9): pp.53-59.

[5] L. Helin, L. Ji, T. Wei, High grade line pipe and high pressure transportation: significant progress of oil & gas transportation pipeline tTechnology in China, China Eng Sci, 2010, 12(5): pp.84-90.

[6] L. Helin, L. Ji, T. Wei, Significant technical progress in west-east gas pipeline projects line one and two, Natural Gas Industry, 2010, 30(4): pp.1-9.

[7] Y. Zhifeng, Z. Wenwei, Z. Zhihong. Development trend of China's gas pipeline and relevant technical problem, Oil Gas Storage Transp, 2012, 31(5): pp. 321-325.

[8] D.W. Cho, S.J. Na, Cho, M.H. Cho, J.S. Lee, A study on vgroove GMAW for various welding positions, Journal of Materials Processing Technology, 2013, 213(9): pp.1640- 1652.

[9] I.S. Kim, J.H. Lee, J.P. Lee, M.H. Park, C.K. Park, Y.S. Kim, A Study on welding quality of pipe in overlay welding process using Mahalanobis Distance method, 2015, Muangun, Mokpo National University.

[10] F. Shengqiang, O. Hiroyuki, T. Hidennori, K. Yuichi, H. Shengsun, Qualitative and quantitative Analysis of GMAW welding fault base on Mahalanobis Distance, International Journal of Precision Engineering and Manufacturing, 2011, 12(6): pp.949-955.

[11] R.R. Chand, A study on experimental and numerical studies on mecahnical characteristics for multi-pass GMA Welding (master thesis), 2013, Mokpo National University, Mokpo, Korea.

[12] M. Toshio, T. Hidenori, O. Hiroyuki, K. Yu-ichi, Develop ments of real-time monitoring method of welding, Transa ction of JWRI 2010, 39(2): pp.369-371.

[13] S.W. Simpson, X. Li, Parametric approach to positional fault detection in short arcwelding, Science and Technol ogy of Welding and Joining, 2009, 2(14): pp.146- 151.

[14] S. Adolfsson, A. Bahrami, G. Bolmsjo, I. Claeson, On-line quality monitoring in short-circuit gas metal arc weldin g, Welding Journal, 1999, 2(78): pp.59-73.

[15] P. Satiya, S. Aravindan, P.M . Ajith, B. Arivazhagan, A.N. Hag, Microstructural characteristics on bead-on-plate welding of AISI 904L super austenitic stainless steel using gas metal arc welding process. International Journal of Engineering, science and Technology, 2010, 2(6): pp. 189- 199.

[16] C.M.D. Starling, P.V. Marques, P.J. Modenesi, Statistical modelling of narrow-gap GTA welding with magnetic arc oscillation, Journal of Materials Processing Technology, 1995, 51(4): pp. 37-49.

[17] American Welding Society, Structural welding code - stee l. 2002, Miami.

[18] O.W. Blodgett, R.S. Funderburk, D.K. Miller, M. Quinta na, Fabricator's and erector's guide to welded st eel construction, 1999, The James F. Lincoln Arc Welding F oundation.

Cites this article as

K. Muzaka, M. Park, J. Lee, B. Jin, D. Kim, I. Kim, "A Study on Prediction of Welding Quality for Verticalposition Welding Using Mahalanobis Distance Method", International Journal of Innovative Research in Engineering & Management (IJIREM), Vol-3, Issue-3, Page No-154-159, 2016. Available from:

Corresponding Author

Khairul Muzaka

Department of Mechanical Engineering, Mokpo National University, 61, Dorim-ri, Chungkye-myun, Muan-gun, Jeollanam-do 534-729, Republic of Korea *Corresponding author Tel: +82-61-450-2416, Fax: +82-61-452-6376