Patent
Pulsed arc welding apparatus
Brian A. Graville,Edward Shmakov +1 more
TLDR
In this paper, the arc voltage is sensed to provide a signal for controlling the frequency of the welding current pulses to counteract variations in electrode wire feed speed or spacing of the electrode from the workpiece.Abstract:
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 sensed to provide a signal for controlling the frequency of the welding current pulses to counteract variations in electrode wire feed speed or spacing of the electrode from the workpiece.read more
Citations
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Patent
Pulsed arc welding
TL;DR: In this paper, the lowest arc voltage across the arc load is detected during a predetermined time period immediately preceding the onset of each current pulse, and the pulse repetition rate is controlled on the basis of this detected voltage so that the detected arc voltage becomes constant.
Patent
Method of determining cable impedance
TL;DR: In this paper, a method of determining the impedance, inductance, and resistance of the network connecting an electrical power supply to an electric arc welding station including an electrode and a workpiece was proposed.
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Twin pulsed arc welding system
TL;DR: In this paper, 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 maintain the desired controlled spray transfer mode of the weld metal without overheating effects.
Patent
Control for gas metal arc welding system
TL;DR: In this paper, an arc welder control in which the current is pulsed between a high level and a low level is described. And a proximity control moves the torch head and the feed wire tip toward and away from the work to stabilize a parameter of welder operation which may deviate with the current pulse energy control.
Patent
Sensing ARC welding process characteristics for welding process control
TL;DR: In this paper, a method of sensing and controlling an arc welding process employs a high equency rate of sampling of electrical signals from the welding circuit, operated upon by predetermined processes to determine electrical resistance, shielding gas quality, and short circuit frequency.
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
Short-circuit arc welding with constant beads
TL;DR: In this article, the authors proposed methods and arrangements in which certain parameters, such as arc time and a short-circuit current delay time are controlled or maintained constant, so that always a constant bead size is assured owing to a constant power, after which said bead of constant size is first partly introduced into the molten pool and subsequently the short circuit current for separation is applied.
Patent
Automatic presettable welding system
TL;DR: An automatic presettable welding system which enables the user to preset the arc voltage and wire feed speed to precise predetermined values without either energizing the wire with arc voltage or initiating the wire feed as discussed by the authors.
Patent
Pulse arc welding method and device in which pulse current and background current have a constant current characteristic
TL;DR: In this article, a pulse arc welding device includes a power source which produces a background current and pulse current imposed on it, and when such a voltage drop deviates from a predetermined level, either one of background current, frequency of the pulse current, and pulse duration of pulse current is controlled to maintain the voltage drop across the arc constant.
Patent
Method and apparatus for arc welding
TL;DR: In this article, a process for adjusting a welding torch with respect to a weld joint formed between two workpieces is disclosed, including determining operating quantities for arcs located in at least two positions relative to said weld joint, deriving characteristic values for each of those operating quantities, and comparing the mathematical combination with a theoretically calculated value for such characteristic values, and then adjusting the position of the welding torch in accordance with the difference between the mathematical combinations of those characteristic values and their theoretically calculated values.