Patent
Output control of short circuit welding power source
TLDR
In this article, a method of controlling the output of a power source in consumable electrode arc welding in which a short circuiting phase and an arcing phase alternately take place between a consumable electrodes and a workpiece in a shielding gas atmosphere is described.Abstract:
A method of controlling the output of a power source in consumable electrode arc welding in which a short circuiting phase and an arcing phase alternately take place between a consumable electrode and a workpiece in a shielding gas atmosphere, the method being characterized by repetition of a cycle of operation consisting of: a first stage of maintaining the output welding current at a first value of a relatively low level upon establishment of a short circuit across a gap between a consumable electrode and a workpiece; a second stage of maintaining the welding current at a second value of a relatively high level succeedingly to the first stage; a third stage of lowering the welding current to a third value of a low level upon detection of necking as a premonition of rupture of short circuiting molten metal between the electrode and workpiece; a fourth stage of, upon generation of an arc across a gap between the electrode and workpiece subsequent to the third stage, maintaining the welding current at a fourth value of a relatively high level exceeding the value of average welding current; and a fifth stage of maintaining the welding current at a fifth value of a relatively low level until the gap between the electrode and workpiece is short-circuited, under control of substantially constant current characteristics to feed current of constant level irrespective of variations in arc length.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.
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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
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Apparatus and method of short circuiting arc welding
Parks John M,Elliott K. Stava +1 more
TL;DR: In this article, a single D.C. power supply is used for causing a welding current to pass through a welding wire extending variable distances from a holder and between the welding wire and a workpiece at a molten metal pool on the workpiece.
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Method and system to start and use combination filler wire feed and high intensity energy source for welding
TL;DR: A method and system to weld or join workpieces employing a high intensity energy source to create a weld puddle and at least one resistive filler wire which is heated to at or near its melting temperature and deposited into the weld puddles is described in this article.
Patent
Method and device for controlling a short circuiting type welding system
Parks John M,Elliott K. Stava +1 more
TL;DR: In this article, a method and device for controlling a power supply for arc welding in a manner to reduce spatter when the power supply is employed for depositing metal from a welding wire or electrode onto a workpiece by the short circuiting transfer mode wherein a welding current causes the welding wire to alternate between a short-circuit condition and an arc condition with metal transfer occurring during a short circuit condition.
References
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Patent
Short circuit transfer arc welding machine
TL;DR: 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.
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 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.