Advanced gas metal arc welding processes

Abstract

There is an increased requirement in the automotive, food and medical equipment industries to weld heatsensitive materials, such as thin sheets, coated thin plates, stainless steel, aluminium and mixed joints. Nevertheless, relevant innovations in arc welding are not widely known and seldom used to their maximum potential. In the area of gas metal arc welding welding processes, digitalisation has allowed integration of software into the power source, wire feeder and gas regulation. This paper reviews developments in the arc welding process, particularly the effect of the setup of the welding process parameters on waveform deposition. It is found that good weldability, good mechanical joint properties and acceptable process efficiency can be obtained for thin sheets through advanced power source regulation, especially over short circuiting, controlled polarity and electrode wire motion. The findings presented in this paper are valuable for waveform and deposition prediction. The need is furthermore noted for an algorithm that integrates gas flow parameters and wire motion control, as well as a variable sensor on the tip of the electrode, permitting flexibility of control of the current and the voltage waveform.

The Effects of GMAW Parameters on Penetration, Hardness and Microstructure of AS3678-A350 High Strength Steel

“…In gas metal arc welding, the variation of power supplies, shielding gas, electrode, welding current and voltage have significant effects, resulting in different process variations. All important metal used in different applications such as aluminium, copper, stainless steel, carbon steel and high strength low alloy steel can be joined by GMAW process by choosing appropriate electrode, shielding gas and different welding condition [2,13]. Currently the manufacturing technology is growing exponentially due to the advent of high speed microcomputers based on fully automated fabrication processes.…”

Analysis of Weld Joint of DX51D Steel with AlMg3 Alloy Made by CMT Welding Method

“…The process brings about 20 -30% less heat than MIG/MAG welding. CMT welding which was originated from the development of the of MIG/MAG welding branch, Schierl (2005), Talalaev et al (2012), is based on controlled near-wire transfer of welded material, Kah et al (2013). The result is a very uniform weld.…”

Symmetrical transition waveform control on double-wire MIG welding

“…Though there were many current waveform methods proposed to improve the welding technique, they mainly focused on the single-wire MIG application (Kah et al, 2013). It is because that the current double-wire MIG facility usually employed two separated control parts, and then the communication between two parts is necessary to conduct online corporative control.…”