Arc Welding System and Wire Feeding Device

{
  "publication_number": "US2019015922A1",
  "country": "US",
  "kind": "A1",
  "title": "Arc Welding System and Wire Feeding Device",
  "abstract": "An arc welding system of a consumable electrode type comprises: a wire feeding device that feeds welding wire from a wire feeding source to a welding torch; and a power supply device that supplies electric power between the welding wire fed to the welding torch and a base material, the system being configured to weld the base material by arc generated by the supplied electric power. The wire feeding device is provided with: an intermediate wire feeding source that is disposed between the wire feeding source and the welding torch and is configured to temporarily accommodate the welding wire fed from the wire feeding source and to feed the accommodated welding wire to the welding torch; a pull-out feeding part that feeds the welding wire at the wire feeding source to the intermediate wire feeding source; and a push-out feeding part that feeds the welding wire accommodated in the intermediate wire feeding source to the welding torch.",
  "claims": [
    "1. An arc welding system of a consumable electrode type, comprising: a wire feeding device that feeds welding wire from a wire feeding source to a welding torch; and a power supply device that supplies electric power between the welding wire fed to the welding torch by the wire feeding device and a base material, the system being configured to weld the base material by arc generated between the welding wire and the base material by the electric power that is supplied, wherein the wire feeding device includes an intermediate wire feeding source that is disposed between the wire feeding source and the welding torch and is configured to temporarily accommodate the welding wire fed from the wire feeding source and to feed the welding wire being accommodated to the welding torch. 2. The arc welding system according to claim 1, wherein the wire feeding device includes: a first feeding part that feeds the welding wire of the wire feeding source to the intermediate wire feeding source; and a second feeding part that feeds the welding wire accommodated in the intermediate wire feeding source to the welding torch. 3. The arc welding system according to claim 2, wherein the intermediate wire feeding source includes a detection unit that detects an accommodated amount of the welding wire, and a feed control unit that controls feeding of the first feeding part so as to accommodate a predetermined amount of welding wire based on a detection result obtained by the detection unit. 4. The arc welding system according to claim 2, wherein the intermediate wire feeding source includes a housing accommodating welding wire, the housing and the wire feeding source are connected with each other by a first conduit cable through which welding wire passes, the housing and the second feeding part are connected with each other by a second conduit cable through which welding wire passes, and the welding wire is guided by the first conduit cable as well as the second conduit cable, and is fed to the welding torch via the intermediate wire feeding source. 5. The arc welding system according to claim 4, wherein the first feeding part is accommodated in the housing. 6. The arc welding system according to claim 4, wherein a load concerning feed of welding wire passing through the first conduit cable is larger than a load concerning feed of welding wire passing through the second conduit cable. 7. The arc welding system according to claim 4, wherein the housing has a placement surface for placing the intermediate wire feeding source. 8. The arc welding system according to claim 2, comprising a welding robot having an arm holding the welding torch, wherein the second feeding part is located at the arm of the welding robot, and the intermediate wire feeding source is arranged side by side with the welding robot. 9. The arc welding system according to claim 1, wherein the power supply device includes a first power supply and a second power supply that are connected in parallel and that supply electric power between the welding wire and the base material. 10. The arc welding system according to claim 9, wherein the first power supply controls power feeding by the first power supply and the second power supply and feeding of welding wire by the wire feeding device. 11. The arc welding system according to claim 1, wherein the wire feeding device feeds welding wire at a speed at which a tip end of the welding wire enters a concave melted portion formed in a base material by arc generated between welding wire and a base material, and the power supply device changes welding current flowing between the welding wire and the base material such that frequency of the welding current is in a range from 10 Hz to 1000 Hz, average current is 300 A or larger and current amplitude is 50 A or higher. 12. The arc welding system according to claim 1, wherein the wire feeding device feeds welding wire at a speed equal to or higher than 5 meters per minute. 13. A wire feeding device feeding welding wire from a wire feeding source to a welding torch, comprising: an intermediate wire feeding source that is disposed between the wire feeding source and the welding torch, and is configured to temporarily accommodate the welding wire fed from the wire feeding source and to feed the accommodated welding wire to the welding torch; a first feeding part that feeds the welding wire of the wire feeding source to the intermediate wire feeding source; and a second feeding part that feeds the welding wire accommodated in the intermediate wire feeding source to the welding torch."
  ],
  "cpc": [
    "B23K 9/133",
    "B23K 9/073",
    "B23K 9/0732",
    "B23K 9/092",
    "B23K 9/1062",
    "B23K 9/1075",
    "B23K 9/124",
    "B23K 9/125",
    "B23K 9/1336"
  ],
  "assignees": [
    "DAIHEN CORP"
  ],
  "filing_date": "2017-03-09",
  "publication_date": "2019-01-17",
  "priority_date": "2016-03-11",
  "application_number": "US-201716080251-A",
  "family_id": "59789636",
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}