K-TIG-based thin-caliber pipeline double-sided double-arc welding system and method

• Main Authors: NIE XIANG, LIU ZUMING, HU CHENGCHONG
• Format: Patent
• Language: Chinese; English
• Published: 15.01.2019
• Subjects: CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; TRANSPORTING; WELDING; WORKING BY LASER BEAM

The invention belongs to the technical field of welding and discloses a K-TIG-based thin-caliber pipeline double-sided double-arc welding system and method. A negative electrode of a welding machine power source is connected with a K-TIG welding gun, and a positive electrode of the welding machine power source is connected with a tungsten electrode ring; the tungsten electrode ring is disposed ina to-be-welded pipeline through an insulating rod; the tungsten electrode ring and the K-TIG welding gun are disposed on the two sides of a butt joint seam of the to-be-welded pipeline correspondingly; during welding, the tungsten electrode ring makes contact with the to-be-welded pipeline, the welding machine power source outputs welding current for arc striking; then the tungsten electrode ringis separated from the inner wall of the to-be-welded pipeline, and electric arcs are ignited; and the K-TIG welding gun is driven to perform circular motion along the butt joint seam of the to-be-welded pipeline, meanwhile the