TITLE

Oscillography Based Analysis of the Arc Stability in Manual Welding with Coated Electrode in Pulsed Current

AUTHOR(S)
Mircea, BURC─é; Ioan, LUCACIU
PUB. DATE
May 2015
SOURCE
Advanced Materials Research;2015, Vol. 1128, p209
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Welding in pulsed current is specific to welding procedures carried out in MIG / MAG and WIG shielding gases environment, and which is appealling from both technological and process quality points of view because of the advantages this procedure provides, especially controlling the transfer mode and the power introduced into components. Making use of pulsed current in manual welding with coated electrodes is a new challenge to modern inverter based sources with potential technological advantages. In this case the advantage of pulsed current is linked to controlling the molten metal bath, its volume as a result of partial solidification, similar to the manual WIG welding using low frequency pulsed current < 5 Hz. The paper presents some technological issues related to the use of pulsed current in the case of manual welding with coated electrodes by arc oscillograpy. Experimental research aimed at recording the shapes of current pulses for different brands of electrodes and diameters, and for different parameters of welding current, different levels of pulses frequency respectively, and the oscillograms analysis through the variation of welding current and arc voltage in order to explain phenomena occurring in the arc when welding. This will allow also a better understanding of the technological issues in the case of manual welding with coated electrode in pulsed current.
ACCESSION #
110787985

 

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