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Welding power supply for pulsed spray welding
| Details |
Inventors: Reynolds, Jon O.; Holverson, Todd E.; Nowak, Albert M.;
Assignee: Illinois Tool Works (Glenview, IL)
Primary Examiner: Shaw; Clifford C.
Assistant Examiner:
Attorney, Agent or Firm: Foley & Lardner
An arc welding machine is disclosed for providing a continuous feed electrode to a weld site. The arc welding machine includes a line frequency transformer having a primary winding, a first secondary winding, and a second secondary winding (e.g., an extension winding, a separate winding, etc.). The first secondary winding provides a welding power having a first voltage at a welding power output terminal. The second secondary winding provides a second welding power having a second higher voltage at an input terminal of a switch, the switch being controlled to provide a pulsed power at the welding power output terminal. According to one feature, the arc welding machine produces a pulsed power having a fixed pulse width and a fixed frequency, the fixed pulse width and fixed frequency being substantially free of operator adjustment. |
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DETAILED DESCRIPTION These and other limitations in the prior art have been overcome by the present invention which, according to one embodiment, is an arc welding machine for providing a continuous feed electrode to a weld site.
The machine includes a line frequency transformer having a primary winding, a first secondary winding and a second secondary winding.
The first secondary winding provides a welding power having a first voltage at a welding power output terminal.
The second secondary winding provides a second welding power having a second higher voltage at an input terminal of a switch.
The switch is controlled to provide a pulsed power at the welding power output terminal.
According to another exemplary embodiment, an arc welding machine is disclosed for providing a continuous feed electrode to a weld site.
The machine includes a line frequency transformer means including first and second secondary windings for receiving a line frequency power and for providing first and second welding powers.
The second welding power has a higher voltage than the first welding power.
The machine includes a first means for receiving the first welding power and for providing a background welding power at the welding power output.
The machine further includes a second means for receiving the second welding power and for providing a pulsed welding power at the welding power output terminal.
According to another exemplary embodiment of the present invention, an arc welding machine is disclosed for providing a continuous feed electrode to a weld site.
The machine includes a power circuit to provide a pulsed welding power to the weld site having a fixed frequency and a fixed pulse width, whereby the fixed frequency and fixed pulse width are substantially free of operator adjustment.
According to a further feature of this embodiment, the power circuit also provides the pulsed welding power having a substantially fixed peak current.
According to yet another exemplary embodiment of the present invention, an arc welding machine is disclosed for providing a continuous feed filler wire to a weld site
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Metal Working 
