Welding system provided with wire feed and arc control
AssigneeU.S. Philips Corporation
InventorEdmond Joannes Jozef De Keyser
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Abstract
In the process of arc welding with electrode wire feed there are many parameters which influence the quality of the welded joint. The welding system proposed provides considerable quality improvement, particularly in short-circuiting arc welding, reduces the dependence of the welding process upon the skill of the welder and greatly simplifies setting of the apparatus. A characteristic regulating parameter of the welding process is regulated so that the mean arc power remains substantially constant. Embodiments given by way of example illustrate ways of measuring and controlling the mean arc power, which, according to the insight on which the invention is based, is the factor which determines quality.
Claims12
A short-circuit arc welding system comprising, a source of welding energy, a device for feeding a consumable electrode wire towards a workpiece to provide regular alternate short-circuit and arcing relationship between the electrode wire and workpiece, an electrode wire holder having a terminal connected to a terminal of said welding energy source, means connecting said workpiece to a second terminal of said welding energy source, a measuring device including means for producing a measuring quantity representative only of the mean arc power P.sub.b of the welding system, a comparison device having a first input for receiving a preset reference quantity indicative of a desired value of mean arc power and a second input for receiving said measuring quantity and means for comparing said reference and measuring quantities to generate a control quantity in the event of a deviation between the reference and measuring quantities, and regulating means responsive to said control quantity for adjusting a welding control parameter of the welding system in a compensating sense to maintain the mean arc power substantially constant.
Dependencies are inferred from the claim text.