# US 2013/0153557 A1 · Dc electrode negative rotating arc welding method and system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0153557 A1 - Document ID: US20130153557A1 - Status: Published application - Kind: A1 - Application number: 13/681,687 - Filed: 2012-11-20 - Published: 2013-06-20 - Earliest claimed: 2011-12-16 - Assignees: Illinois Tool Works Inc. - Inventors: Kevin Pagano; James Lee Uecker; Steven Barhorst; Bryan Dustin Marschke; Mario Amata - Web page: https://patentgrep.com/patent/US20130153557A1 ## CPC - B23K 9/12: Automatic feeding or moving of electrodes or work for spot or seam welding or cutting - B23K 9/0216: {Seam profiling, e.g. weaving, multilayer} - B23K 9/09: Arrangements or circuits for arc welding with pulsed current or voltage - B23K 9/173: and of a consumable electrode - B23K 35/3611: {Phosphates} - B23K 35/368: Selection of non-metallic compositions of core materials either alone or conjoint with selection of soldering or welding materials - B23K: SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM ## Abstract A welding operation is performed by moving or rotating an arc in a welding torch, and feeding a metal cored wire through the torch in a direct current, electrode negative welding process. The electrode may include one or more arc stabilizers. The welding process may be pulsed or non-pulsed. Moreover, the process may be used with a number of different base metals intended to be welded, such as thin plate, galvanized metals, painted metals, coated metals, and so forth. ## Claims ### Claim 1 A welding method comprising: establishing an arc between a metal cored welding electrode and a workpiece in a direct current, electrode negative welding polarity, the metal cored welding electrode comprising a sheath and a core; feeding the electrode from a welding torch while cyclically moving the electrode in a desired pattern by a motion control assembly within the welding torch to maintain an arc between at least the sheath and the workpiece; and advancing the welding torch or the workpiece to establish a weld bead. ### Claim 2 (depends on 1) The method of claim 1, wherein the welding electrode comprises at least one arc stabilizer acting as a source of potassium and carbon. ### Claim 3 (depends on 2) The method of claim 2, wherein at least one arc stabilizer comprises at least one of potassium and compounds that contribute potassium during the welding process, potassium feldspar, potassium titanate, potassium manganite-titanate, potassium sulfate, potassium carbonate, potassium phosphate, potassium molybdate, potassium nitrate, potassium fluosilicate, complex oxide compounds containing potassium, graphitic and non-graphitic carbon sources. ### Claim 4 (depends on 3) The method of claim 3, wherein at least one hydrogen source comprises at least one of cellulose, sodium carboxy-methyl-cellulose, methyl cellulose and organic compounds and inorganic compounds that contain hydrogen. ### Claim 5 (depends on 1) The method of claim 1, wherein the welding electrode conforms to AWS standard A5.18 EXXC-6. ### Claim 6 (depends on 1) The method of claim 1, wherein the workpiece comprises a galvanized material. ### Claim 7 (depends on 1) The method of claim 1, wherein the workpiece comprises a coated or painted material. ### Claim 8 (depends on 1) The method of claim 1, wherein the direct current, electrode negative welding regime comprises a pulsed welding regime. ### Claim 9 (depends on 1) The method of claim 1, wherein the welding torch or the workpiece is advanced at a rate of at least 23 inches per minute. ### Claim 10 (depends on 1) The method of claim 1, wherein the electrode is moved at a rate of between approximately 50 Hz and approximately 120 Hz. ### Claim 11 A welding system comprising: a power supply configured to provide power to establish an arc between a metal cored welding electrode and a workpiece in a direct current, electrode negative welding polarity, the metal cored welding electrode comprising a sheath and a core; a wire feeder coupled to the power supply and configured to feed the electrode from a welding torch; and a welding torch that in operation receives the electrode from the wire feeder while cyclically moving the electrode in a desired pattern by a motion control assembly within the welding torch to maintain an arc between the sheath and the workpiece. ### Claim 12 (depends on 11) The system of claim 11, wherein the welding electrode comprises at least one arc stabilizer acting as a source of potassium and carbon. ### Claim 13 (depends on 12) The system of claim 12, wherein at least one arc stabilizer comprises at least one of potassium and compounds that contribute potassium during the welding process, potassium feldspar, potassium titanate, potassium manganite-titanate, potassium sulfate, potassium carbonate, potassium phosphate, potassium molybdate, potassium nitrate, potassium fluosilicate, complex oxide compounds containing potassium, graphitic and non-graphitic carbon sources. ### Claim 14 (depends on 13) The system of claim 13, wherein at least one hydrogen source comprises at least one of cellulose, sodium carboxy-methyl-cellulose, methyl cellulose and organic compounds and inorganic compounds that contain hydrogen. ### Claim 15 (depends on 11) The system of claim 11, wherein the welding electrode conforms to AWS standard A5.18 EXXC-6. ### Claim 16 A welding method comprising: providing welding power to establish an arc between a welding electrode and a workpiece in a direct current, electrode negative welding polarity; feeding the electrode from a welding torch while cyclically moving the electrode in a desired pattern by a motion control assembly within the welding torch to maintain an arc between the electrode and the workpiece; and advancing the welding torch or the workpiece to establish a weld bead. ### Claim 17 (depends on 16) The method of claim 16, wherein the electrode comprises a metal cored welding electrode comprising a sheath and a core. ### Claim 18 (depends on 17) The method of claim 17, wherein the arc is established between at least the sheath and the workpiece. ### Claim 19 (depends on 16) The method of claim 16, wherein the workpiece comprises a galvanized, coated, or painted material. ### Claim 20 (depends on 16) The method of claim 16, wherein the direct current, electrode negative welding regime comprises a pulsed welding regime.