Eur. Phys. J. Appl. Phys.
Volume 50, Number 1, April 2010
|Number of page(s)||3|
|Section||Plasma, Discharges and Processes|
|Published online||26 February 2010|
Method of metal transfer regulation during GMA welding
Keiser University, 1500 N.W. 49th Street, Fort Lauderdale, FL, 33309, USA
2 ESAB Welding and Cutting Products, 801 Wilson Avenue, Hanover, PA, 17331-7948, USA
Corresponding author: email@example.com
Revised: 9 December 2009
Accepted: 18 December 2009
Published online: 26 February 2010
The main force that detaches a molten droplet from the electrode (wire) during arc welding is the interaction of the arc current with its own magnetic field. The magnitude of this force depends on the current distribution inside the droplet. A method to regulate the current distribution is proposed. The current redistribution is achieved by striking an additional arc with the droplet serving as a cathode of this arc. By the current redistribution it is possible (i) to decrease the threshold current of the globular to spray transition during GMA welding, (ii) to achieve this transition in different plasma gases, and (iii) to control the propelling direction of the detaching droplet. Some preliminary experiments confirm the proposed method.
© EDP Sciences, 2010
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