Multisensor-based monitoring of weld deposition and plate distortion for various torch angles in pulsed MIG welding

Authors: Pal, Kamal¹; Bhattacharya, Sandip¹; Pal, Surjya²

Source: The International Journal of Advanced Manufacturing Technology, Volume 50, Numbers 5-8, September 2010 , pp. 543-556(14)

Publisher: Springer

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Abstract:

Manufacturing companies often fail to maintain good weld quality due to poor arc stability and distortion after welding. Weld quality can be improved by reducing the transverse shrinkage and the angular distortion in butt welding. The welding deposition efficiency is also an important economic factor. In this work, various pulse voltage parameters have been varied along with welding torch angle in pulsed metal inert gas (P-MIG) welding. The experimental results revealed that the peak voltage is the dominant pulse voltage parameter. Various sensors were also used to monitor arc current, arc voltage, arc sound, and also weld temperature. A strong relationship between arc sound (as well as arc power) and transverse distortion (as well as metal deposition) was found to exist in P-MIG welding. The frequency domain features of welding arc sound were also extracted and correlated to the process characteristics.

Keywords: Welding torch angle; Arc acoustics; Transverse shrinkage; Angular distortion; Deposition efficiency

Document Type: Research article

DOI: http://dx.doi.org/10.1007/s00170-010-2523-8

Affiliations: 1: Department of Mechanical Engineering, Indian Institute of Technology, Kharagpur, 721 302, India 2: Department of Mechanical Engineering, Indian Institute of Technology, Kharagpur, 721 302, India, Email: skpal@mech.iitkgp.ernet.in

Publication date: 2010-09-01