US 12,168,271 B2
Reciprocating preheating system, method, and apparatus
Michael V. Hoeger, Appleton, WI (US)
Assigned to Illinois Tool Works Inc., Glenview, IL (US)
Filed by Illinois Tool Works Inc., Glenview, IL (US)
Filed on Nov. 6, 2020, as Appl. No. 17/091,762.
Prior Publication US 2022/0143733 A1, May 12, 2022
Int. Cl. B23K 9/167 (2006.01); B23K 9/095 (2006.01); B23K 9/10 (2006.01); B23K 9/12 (2006.01); B23K 9/173 (2006.01)
CPC B23K 9/167 (2013.01) [B23K 9/0953 (2013.01); B23K 9/1093 (2013.01); B23K 9/125 (2013.01); B23K 9/1675 (2013.01); B23K 9/173 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A welding system to eliminate effects of arc blow, the welding system comprising:
welding circuitry configured to provide welding-type power to an electrode of a welding torch to generate a welding arc between a welding work piece and the electrode to form a weld pool during a welding operation;
preheat circuitry configured to provide preheat power to heat a filler material;
a wire-feeding mechanism configured to advance and retract the filler material relative to the welding work piece during the welding operation; and
control circuitry operably coupled to the welding circuitry, the preheat circuitry, and the wire-feeding mechanism, wherein the control circuitry is configured to perform a reciprocation cycle that comprises:
advancing, via the wire-feeding mechanism, the filler material toward the welding work piece until the filler material is electrically connected to the weld pool;
supplying the preheat power, via the preheat circuitry, to heat the filler material while the filler material is electrically connected to the weld pool;
retracting, via the wire-feeding mechanism, the filler material away from the welding work piece until the filler material is not electrically connected to the weld pool;
prior to generation of the welding arc, terminating supply of the preheat power, via the preheat circuitry, to the filler material while the filler material is not electrically connected to the weld pool; and
after terminating supply of the preheat power, supplying the welding-type power, via the welding circuitry, to generate the welding arc between a welding work piece and the electrode to form the weld pool.