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8174399 |
Methods to detect hazardous conditions in a safety ground circuit in the presence of ground loop currents and electrical noise
The invention comprises a set of methods to detect the resistance of a connection to safety ground and to detect the presence of voltage hazardous to people in systems where an unknown amount of...
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8153933 |
Welding control apparatus and method
The present invention provides a welding control apparatus including: a droplet separation detecting unit that detects separation of a droplet from a tip end of welding wire; and a waveform...
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8101886 |
Welding article and welding method of carrying out an alternating current arc welding
A welding method of carrying out an alternating current arc welding by switching polarities of a voltage applied between a wire and workpieces when weld-connecting the workpieces to each other by...
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8080763 |
Method of controlling arc welding and welding apparatus
A wire feeding speed is decreased to a level lower than a base wire feeding speed in a short-circuiting period, and set to the base wire feeding speed in an arcing period. During the arcing period,...
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8076611 |
Welding device having a selector to designate welding conditions
A welding device includes a welding torch, a memory, a power supply, an input section, a selector, and a controller. The welding torch includes a welding tip having a feeder for supplying electric...
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8063339 |
Welding system toroidal spark gap method and system
A spark gap device is described such as for use in welding systems. The device receives a high voltage, low current input signal and produces high frequency waveform output. The device includes one...
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7989732 |
Method of AC welding using a flux cored electrode
A method of AC welding that includes the step of supplying AC current with a given waveform from a power source to an advancing electrode and workpiece. The AC current is used to melt the electrode...
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7960672 |
Robot welding controller and control method
A robot welding controller and a robot welding control. It comprises a robot having a welding torch at its tip, a robot controller, a wire feeder, and a welding electric power. It performs welding...
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7919728 |
Welding current controlling method in arc welding process using consumable electrode upon detection of constriction
A welding current controlling method is provided for an arc welding process using a consumable electrode and including an alternate repetition of a short-circuiting state and an arc generating...
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7842903 |
Short arc welding system
A welding system for performing a short arc welding process between a advancing wire electrode and a workpiece. The system comprises a power source with a controller for creating a current pulse...
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7800016 |
Polarity switching short circuiting arc welding method
A method of performing polarity switching short circuiting arc welding is provided. In the arc welding, a welding wire is fed at a constant feeding rate, a short circuiting state and a arcing state...
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7781700 |
User interface for welding power supply
A welding power supply includes a user interface that allows the operator to adjust one or more welding parameters comprising a welding sequence for a welding process. The user interface may...
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7638734 |
Method and circuit for contactless ignition of a welding arc with high frequency ignition pulse packets
The invention relates to a method for the contactless ignition of a welding arc, in addition to a circuit (28) for the contactless ignition of an electric arc, comprising a charging circuit (31),...
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7598475 |
Arc welding control method and arc welding machine
An arc welding control method for repeating alternately a short circuit period allowing a welding wire to short circuit with respect to a member to be welded and an arc period allowing arc...
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7576299 |
Generator for arc welder with high power factor
A generator for arc welder, of the type composed of a rectifier stage followed by a PFC stage and by an inverter stage, both of the high-frequency type, the latter stage supplying power to a final...
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7495193 |
Pipe seam tack welding methods and apparatus using modified series arc welding
Welders and methods are presented for short-circuit arc welding a workpiece using a modified series arc welding configuration with two electrodes via a sequence of welding cycles, in which each...
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7414222 |
Method and apparatus for pulse and short circuit arc welding
A method and apparatus for multi process welding includes providing a controlled short circuit output and a pulse output in response to a user selection across a workpiece output stud and a torch...
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7411156 |
Electric arc welding system
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 arc with a...
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7397015 |
Metal cored electrode for open root pass welding
A method and apparatus of forming a root bead in a gap between spaced ends of at least one workpiece. The gap includes an open root. A metal cored electrode having a metal sheath and core materials...
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7385159 |
Output stage for an electric arc welder
An auxiliary OCV boost circuit for the power source of an electric arc welder to perform a welding process between an electrode and a workpiece, which power source has a main positive voltage...
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7358459 |
Electric arc welder system with waveform profile control
An electric arc welder for creating a succession of AC waveforms between an electrode and workpiece by a power source comprising an high frequency switching device for creating individual waveforms...
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7351933 |
Method and apparatus for controlling a welding system
A method and apparatus for controlling a welding-type power supply includes providing a current wave form having an arc current portion and a short circuit current portion. An arc state is entered...
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7335853 |
Method for orbital welding using a pulsed current
A method for the orbital welding of tubular elements held in abutment comprising the steps of striking an arc at a strike point with an orbital welder between an electrode and a seam formed by a...
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7335852 |
Method and apparatus for welding
A method and apparatus for MIG welding is disclosed. When in an ac mode the output is unbalanced, or the balance may be controlled. The balance may be controlled to provide a desired deposition...
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7304269 |
Pulse welder and method of using same
An electric arc welder for performing a pulse welding process by a current between an advancing electrode and workpiece where the welder comprises a short detecting circuit for creating a short...
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7301123 |
Method for modifying or producing materials and joints with specific properties by generating and applying adaptive impulses a normalizing energy thereof and pauses therebetween
A method of impulse treatment which modifies at least one specified property of a material or object (such as a welded joint), or produces a material or object with at least one specified physical,...
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7288741 |
Arc welder
An arc welder comprising: a rectifier circuit 2 which rectifies an alternating current 1 to a direct current; an inverter circuit 3; a transformer 4; a second rectifier circuit 5 which rectifies an...
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7271365 |
System and method for pulse welding
Systems and methods are provided for pulse welding, in which a welding signal is provided to an electrode in series of pulse welding cycles, where the amount of energy applied to the electrode in...
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7262387 |
Method and apparatus for arc welding with arc control
A method and apparatus for providing welding power with an arc-width control is disclosed. The power supply includes a power circuit that provides a welding output characterized by a plurality of...
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7256368 |
Welding and tack welding method involving the use of a non-fusing electrode
The invention relates to a welding method involving the use of a non-fusing electrode (12) according to which the electrode (12) is provided with power from a power source once the arc (11) between...
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7235760 |
AC pulse arc welding method
In accordance with an AC pulse arc welding method, a periodic welding current is applied, that includes, for a pulse cycle, negative current in electrode negative polarity and positive current in...
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7173214 |
Electric arc pulse welder with short circuit control
An electric arc welder with a waveform generator controlled to create a welding process involving current flow between an electrode and a workpiece wherein the welding process comprises a...
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7166818 |
Tandem electrode welder and method of welding with two electrodes
An electric arc welding apparatus comprising at least a first consumable electrode and a second consumable electrode movable in unison along a welding path between the edges of two adjacent,...
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7145101 |
Pulse arc welding output control method and arc length variation pulse arc welding output control method
An output control method is provided for a pulse arc welding in which a welding current flows for one pulse period consisting of a peak period with a flow of a peak current and a base period with a...
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7132623 |
Luminescence sensing system for welding
A method and apparatus can adaptively control a pulsed power arc welding process. A trainable system can recognize an empirical transfer mode from a signal emitted during an arc welding pulse and...
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7129443 |
Method and apparatus for welding with CV control
A method and apparatus for welding is disclosed. The output is preferably a cyclical CV MIG output, and each cycle is divided into segments. An output parameter is sampled a plurality of times...
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7109439 |
Short circuit arc welder and method of controlling same
An electric arc welder operated to perform a short circuit welding process between an electrode and a workpiece, where the process comprises a succession of alternate short circuit conditions and...
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7105773 |
Electric arc welder
An electric arc welder for depositing weld metal along a groove between two edges of a metal workpiece where the welder comprises a first electrode driven by a first wire feeder toward a point in...
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7105772 |
Arc welding system and method
A welder using a circuit or method of changing polarity of an AC welding current comprising: the generation of a polarity changing signal, commanding a change in the polarity of the current a given...
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7091446 |
Electric arc welding system
An electric arc welding system and method 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...
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7075032 |
Power supply apparatus
An input-side rectifier (4), a smoothing capacitor (6), an inverter (8), a transformer (10) and an output-side rectifier (12) operate together to convert an AC voltage supplied from an AC power...
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7067767 |
Two stage welder and method of operating same
An electric arc GMAW welder is provided, which welder includes a high speed switching power supply with a controller for creating a first or second weld process across the gap between a workpiece...
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7060935 |
Power supply for electric arc welding
A power supply connectable to a source of AC line voltage for AC electric arc welding by an AC arc current across a welding gap between an electrode and a workpiece, the power supply comprises a...
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6992264 |
Welding method and welding power supply apparatus
An IGBT (16) intermittently interrupts a current from a positive terminal (12P) of a DC supply (2) to a workpiece (24). An IGBT (20) intermittently interrupts a current from a negative terminal...
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6982397 |
Tig welding apparatus and method
A TIG welding apparatus comprises; a twin electrode type welding torch 1 having a first and a second welding electrode 1a, 1b arranged approximately parallel and either side of an insulation plate...
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6858813 |
Weld overlay system
A process for applying a weld overlay to a tube with a single pass of a weld head. An inverter-type alternating current pulsed power source, composed of a primary inverter and a secondary inverter,...
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6833529 |
Power supply for short-circuiting arc welding, and automatic welding machine utilizing the same
A power supply for arc welding includes switching elements PTR, NTR for switching the polarity of the direct voltage from a power circuit PMC. The element PTR is connected in parallel to a series...
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6797922 |
Power supply apparatus for welder
A power supply apparatus for a welder includes a rectifier (104) and a smoothing reactor (106) which operate together to convert a commercial AC supply voltage to a DC voltage. The DC voltage is...
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6794608 |
Welding current control system and method
A system and method for controlling a weld-current in an arc welding apparatus involves programming of a waveform generator to supply a control signal to a weld-current power supply, the control...
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6734394 |
Electric arc welder and controller to duplicate a known waveform thereof
A system for creating an actual waveform at the output of an electric arc welder and caused by a waveform generator where the welder has a display and customizing screen to design a commanded...
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