Patent
Short circuit transfer arc welding machine
TLDR
In this paper, a short circuiting arc welding machine is used to increase the depth of bead penetration into a workpiece by adding a pulsed current having upper and lower limits to a current flowing when an arc is produced.Abstract:
A short circuiting arc welding machine increases an arc current density by adding a pulsed current having upper and lower limits to a current flowing when an arc is produced, thereby increasing the depth of bead penetration into a workpiece, removing welding defects, and speeding up the welding operation. The welding machine is capable of alternately changing the direction of flow of a welding current at desired periods to produce arcs in straight, reverse and mixed polarities for achieving intermediate characteristics of arcs of straight and reverse polarities, with a resultant ability to adjust in a wide range a wire melting rate and the amount of heat applied to the workpiece.read more
Citations
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Patent
Method and apparatus for welding
TL;DR: In this paper, a method and apparatus for welding include initiating a pulse welding process includes initiating a welding arc by providing CC type welding power, maintaining the arc by CV type power, and providing welding power in a pulse, short circuit, or given welding process.
Patent
ARC welding machine
TL;DR: In this article, an arc welding machine comprises an output control circuit (2) which produces an arc output in accordance with output control signal, an output detection circuit (3) which measures the state of arc output and produces a feedback signal indicative of the output arc state.
Patent
Three stage power source for electric ARC welding
Todd Eric Kooken,Lifeng Luo +1 more
TL;DR: In this article, a three-stage power source for an electric arc welding process is presented, consisting of an input stage having an AC input and a first DC output signal; a second stage in the form of an unregulated DC to DC converter having an input connected to the first AC output signal, a network of switches switched at a high frequency with a given duty cycle to convert the input into a first internal AC signal, an isolation transformer with a primary winding driven by the first internal high frequency AC signal and a secondary winding for creating a second internal high-frequency AC signal of the second
Patent
Electric arc welding system
TL;DR: In this paper, an electric arc welding system for creating a first AC welding arc with a first current waveform between a first electrode and a workpiece by a first power supply and a second AC welding assembly by a second power supply as the first and second electrodes are moved in unison along a welding path.
Patent
Method and apparatus for feeding wire to a welding arc
TL;DR: In this article, a method and apparatus for feeding wire in a welding system include one or more motors disposed adjacent the wire to drive it, and a wire feed motor is also disposed along the wire path, and is closer to the source of wire than the torch.
References
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Patent
Gas metal arc welding system
TL;DR: In this paper, the output current from the power supply was modulated at a given frequency appropriately adjusted in accordance with the electrode material and diameter to maintain optimum spray metal transfer in the welding arc.
Patent
Method for short circuit metal transfer arc welding
TL;DR: The method and system of the present invention minimizes weld spatter through control of short circuit current and through control over the short circuit and arc time intervals as discussed by the authors, which minimizes welding spatter.
Patent
Welding power source
J Needham,P Boughton +1 more
TL;DR: In this paper, a short-circuit detector is used to detect the impending rupture of a short circuit and a control circuit is activated to reduce the current before the rupture takes place.
Patent
Welding system provided with wire feed and arc control
TL;DR: In this paper, 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.
Patent
Welding apparatus with time interval control
TL;DR: In this paper, an apparatus for short-arc welding comprises a controllable current source, means for controllably feeding a consumable wire electrode to the weld location, and a control unit for automatically adjusting the current source in dependence upon the welding sequence.