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Method And System For Gas Metal Arc Welding, Yuming Zhang, Liguo E
Method And System For Gas Metal Arc Welding, Yuming Zhang, Liguo E
Electrical and Computer Engineering Faculty Patents
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 current. During the welding process, the current is sufficient to produce a droplet at the end of a consumable electrode wire. After the droplet reaches a desired size, the current is lowered to induce an oscillation in the droplet. The current is then increased which, in combination with the momentum created by the oscillation, effects droplet detachment. The oscillation may be monitored by observing the arc voltage to determine a preferred …
Method Of Arc Welding Using Dual Serial Opposed Torches, Yuming Zhang, Shaobin Zhang
Method Of Arc Welding Using Dual Serial Opposed Torches, Yuming Zhang, Shaobin Zhang
Electrical and Computer Engineering Faculty Patents
An improved method of arc welding uses a single power supply connected to opposed welding torches placed on both sides of a workpiece. Each torch is connected to a different polarity lead of the power supply and forms a separate arc with the workpiece. When a current is supplied to the first torch, it is guided from the first electrode, through the first arc, the workpiece, the second arc, and to the electrode of the second torch. This guiding function improves the penetration, concentration, as well as the directional stability of the arc. This permits the effective and efficient welding …