| 摘要 |
PURPOSE:To increase work efficiency and welding quality by feeding a metal electrode to welding tip with bending it in V shape between feeding rollers. CONSTITUTION:An arc welding machine M feeds a tape-like electrode 14 to a welding tip 15 with pressing it between the electrode feeding roller 12 being rotated by motor 11 and pressure feeding roller 13. A V-shaped projection and groove are respectively formed on the rollers 12, 13 in peripheral direction and the gap of V-shaped section if formed between both rollers. The tape-like electrode 14 is bent in V-shaped section at the time of its passing through the gap between the rollers 12, 13, coming into the through hole of the welding tip 15 as it is and used as V-shaped electrode. Due to the sectional area of the electrode 14 being increased against the same beveling width, the electrode melting speed is increased and the work efficiency is promoted. The welding quality is increased because of the weld penetration immediately under the apex of the electrode being secured. |
