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7183516 |
System and method for welding with multiple arcs
A system and method for welding with a first and second arc between a first and second electrode, respectively, and a common workpiece, where each of the electrodes is driven by a single power...
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6909067 |
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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6809293 |
Controlled output for welding
A method and apparatus for welding is disclosed. It includes a source of power and a controller. An output feedback circuit provides feedback to the controller. The controller includes a comparator...
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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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6710297 |
Method of detecting a welding voltage
The invention describes a method of detecting welding process voltage, whereby the welding process voltage between a welding torch ( 10 ) and a workpiece ( 16 ) is detected and the welding process...
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6609033 |
Field programmable welding controller
Welding controller 1 has CPU 1 a , ROM 1 1 b , ROM 2 1 c and RAM 1 d . Programs and data are written into the ROM 1 1 b and can be rewritten. Sequential welding data is written into the RAM 1...
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6515259 |
Electric arc welder using high frequency pulses
An electric arc welder including a high speed switching power supply with a controller for creating high frequency current pulses through the gap between a workpiece and a welding wire advancing...
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6501049 |
Short circuit arc welder and method of controlling same
An electric arc welder operated to perform a short circuit process with a first waveform controlling a short condition followed by a second waveform controlling an arc condition, wherein the welder...
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6479791 |
Dynamic voltage sensing with failure indication
A method and apparatus for welding is disclosed. The welding system includes a power supply and a controller. The power supply has a control input and a power output. The controller has a control...
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6335511 |
Control method and apparatus for an arc welding system
An arc welding control method and apparatus includes a voltage control loop in which a pulsation parameter such as pulse width, pulse amplitude, background amplitude between pulses, or frequency,...
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6316745 |
Arrangement with transfer of measured values
The invention relates to an arrangement for material transport and/or energy transport by means of electric arc. Measured values are transferred with suppression of disturbances from the HF device...
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6307177 |
Method and device for determining the voltage at welding power sources
A process and a device are provided for determining the working voltage of welding current sources 25. The working voltage is determined partly outside the output terminals 23, 24 of the welding...
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6278081 |
Method and apparatus for producing welding power
A method and apparatus for providing submerged arc welding power is disclosed. The power supply is AC/DC, and may be controlled in either a CV or a CC mode. The power supply includes a...
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6259059 |
Arc welder and torch for same
In an electric arc welder for creating an arc welding process between a consumable electrode advancing through a contact tip and a workpiece, the welder including a power supply to create an arc...
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6225597 |
Method of controlling pulse output and consumable electrode type pulse arc welding device
When a welding voltage is lowered, a pulse period is shortened or a peak current is reduced so that an average of a pulse frequency is not changed. Therefore, short circuit is regularly generated...
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6107602 |
Switchable power supply with electronically controlled output curve and adaptive hot start
A welding power supply that includes a series resonant converter, including at least one switch and at least one capacitor is disclosed. The converter includes a switching circuit including an...
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6087627 |
Method of controlling a welding process and controller therefor
A controller and method for adjusting an output welding parameter of a D.C. electric arc welder for controlling a welding process wherein a welding wire is advanced toward a workpiece while an arc...
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6066832 |
Welding arc voltage sense lead
A welding cable designed to work with a welding system that does not have a pull-type torch is disclosed. The cable includes an electrode lead and an arc voltage sense lead. An insulating jacket is...
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6051806 |
Power supply apparatus for welders and method of manufacturing same
A power supply apparatus for welders includes an input-side AC-to-DC converter for converting an input commercial AC voltage into a DC voltage, which is, in turn, converted to a high-frequency...
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6034350 |
Method and apparatus for initiating a welding arc using a background circuit
An apparatus for initiating a welding arc during a lift arc start. The apparatus includes a power circuit to provide welding power to a power output, a background circuit to provide background...
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6008470 |
Method and system for gas metal arc welding
An improved method of gas metal arc welding (GMAW) is disclosed. The method includes utilizing a pulsed current having a variable waveform to ensure the detachment of one-droplet-per-pulse of...
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5866872 |
Plasma arc torch position control
A plasma arc torch system includes a plasma arc torch and a positioning apparatus for automated processing of workpieces. In order to maintain consistent cut quality, a controller maintains arc...
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5834732 |
Apparatus for controlling consumable electrode type pulsed arc welding power source
In a consumable electrode type pulsed arc welder using a CO 2 shielding gas a voltage detected by a detector (13) is given to a comparator (14) to which a reference voltage of a voltage setting...
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5742029 |
Method of welding wallpaper alloy an arc welder modified to practice same
A method of and welder for welding a corrosion resistant, wallpaper alloy to the inside surface of a vessel wall formed from a corrosion susceptible steel sheet after the wallpaper alloy has been...
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5645741 |
ARC processing apparatus comprising driving means for controlling output transistor so that output voltage becomes predetermined no-load voltage
In an arc processing apparatus for supplying an electric power for an arc process through output terminals to a load containing an electrode and a workpiece to be processed, a main power source...
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5306894 |
Consumable electrode type D.C. arc welder
An invertor controlled D.C. arc welder of consumable electrode type which is arranged to rectify an a.c. power from a commercial power supply, convert it into a high frequency a.c. power by an...
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5225658 |
Stopping a plasma arc cutter upon completion of cutting
In a plasma arc cutter and a method of controlling the same, a rise compensating circuit (39) and a shift compensating circuit (44) both composed of a charging and discharging capacitor and a...
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5214259 |
Method and apparatus for forming a ball at a bonding wire end
In a method and apparatus for making uniform size balls at the end of bonding wires, a constant current circuit is installed between a high voltage power source and a discharge electrode so that a...
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5149940 |
Method for controlling and synchronizing a welding power supply
A microprocessor-controlled arc welding power supply is disclosed. An silicon controlled rectifier ("SCR") bank is used to generate a direct current arc welding current under program control....
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5073695 |
Welding power supply with short circuit protection
A pulsed welding power supply with short circuit and overcurrent protection. A switching device (55) provides output voltage and output current to the output (17, 18, 19) of a pulse welding power...
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4996407 |
Plasma arc transfer controller
The invention comprises a power transfer circuit for a plasma torch for smoothly and linearly transferring the plasma arc from the nozzle of the torch to a workpiece as cutting operation commences...
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4987285 |
Protection circuit for plasma-arc welding and cutting equipment operated with transferred or non-transferred arc
The circuit is designed to protect plasma-arc welding or cutting equipment wired for transferred or non-transferred arc operation, using a torch of which the electrode is connected to the negative...
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4963715 |
Variable polarity power supply for welding
Disclosed is a variable polarity power supply for arc welding that quickly switches between polarities in order to more easily re-establish the arc. The variable polarity power supply includes a...
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4806735 |
Twin pulsed arc welding system
The invention provides a gas-shielded arc welding system using two side-by-side electrodes each of which is provided with current pulses superimposed on a respective background current level to...
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4797529 |
Stud welding apparatus
Control circuit for arc welding components to workpieces, in which a component is placed on to a workpiece by a weld gun and after a welding stroke is lifted from the workpiece in a return stroke...
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4758707 |
Pulsed arc welding
A pulsed arc welding system includes a current pulse generating circuit and a background current generating circuit. The lowest arc voltage across the arc load is detected during a predetermined...
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4743732 |
Method of electric-arc condenser-discharge percussion stud welding
The method of electric-arc condenser-discharge percussion stud welding includes prepositioning a stud on an article, retracting the stud from the article while igniting an auxiliary arc between...
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4620082 |
Pulsed arc welding apparatus
A method of pulsed arc welding and an apparatus for carrying out the method, employ welding current pulses having an amplitude greater than the value of a background current. The arc voltage is...
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4608482 |
Control for welding system
An improved welding power supply control circuit is disclosed. The control circuit, which incorporates a microprocessor, simultaneously adjusts the power supplied to a welding electrode and the...
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4570050 |
Arc welding control system
An arc welding control system wherein the welding current is held to a very low value during the time a welding electrode is coupled with a workpiece. When the welding electrode is disengaged from...
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4527045 |
Control apparatus for an arc welder
An arc welder is provided with a phase control circuit by rectifying elements to simplify the construction of the arc welder and improve the performance and operability. The arc welder is further...
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4523077 |
Electric arc welder that provides non-sticking arc initiation and thereafter maintains the arc
An electric arc welder has a current-conducting means which can supply welding power to an arc along a first volt-ampere curve, has a second current-conducting means which can be paralleled with...
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4514615 |
Protection circuit against electric shocks during welding
A circuit for controlling the power supply to an electrode of the shielded type, such as that used in a shielded metal arc welding process (SMAW) whereby to protect a user from electric shocks. The...
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4512513 |
Arc metal spray apparatus and method
An apparatus and method for spraying molten metal that is light weight, requires low maintenance and is quick and simple to operate. A feed system is provided that uses an electric motor and...
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4497997 |
Method and apparatus for metal arc welding with constant currents
The invention relates to a process and an apparatus for metal arc welding with a consumable electrode. A pulsating current is supplied to the electrode from a constant current source. During the...
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4485293 |
Short circuit transfer arc welding machine
A short circuit transfer arc welding machine including a wire electrode which is fed towards a base metal, a DC source for applying a voltage across the base metal and the wire electrode, a...
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4443687 |
Method and system for automatically terminating a MIG welding operation
A method and control circuit for terminating a consumable electrode electric arc welding operation which comprises monitoring the welding parameters of the wire drive motor speed and the arc...
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4427874 |
Pulse arc welding machine
A pulse arc welding machine in which, when any one of the material and diameter of a consumable wire electrode or the shielding gas used is varied, a peak current value and pulse width of a pulse...
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4409465 |
Pulse arc welding method and device in which pulse current and background current have a constant current characteristic
A pulse arc welding device includes a power source which produces a background current and pulse current imposed on it. A voltage drop across the arc is measured and when such a voltage drop...
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4384187 |
Feedback control system for pulsed DC arc welding
A feedback control system for a pulsed direct current (DC) arc welding system is disclosed wherein the duty cycle of current pulses supplied by a power supply is controlled in response to...
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