INDUCTION HEATED, HOT WIRE WELDING
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United States of America Patent
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app pub date -
Nov 16, 2009
filing date -
May 31, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A hot wire welding process. An induction coil is used to preheat the filler metal wire prior to its entering the welding puddle/arc region. An induction coil is placed in close proximity to the welding arc. The filler wire is guided and supported by a delivery guide so that the filler wire passes through the center of, and is insulated from, the induction coil. The induction coil induces a current flow in the filler wire. The current produces heat as a result of the electrical resistivity of the filler wire. The heat produced raises the temperature of the filler wire just before it is fed into the weld arc region, thus reducing the energy required from the welding arc to melt the filler metal wire into the weld puddle.
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