| 摘要 |
PURPOSE:To speed up submerged arc welding further without spoiling the quality of a weld zone by making welding giving a magnetic field of specified intensity to the lower part of the second and sulese quent electrode wires. CONSTITUTION:An arc 6a is oscillated electromagnetically in the direction perpendicular to the face of paper (perpendicular to the weld line) by making the direction of magnetic line of force that crosses the arc 6a of preceding electrode P1 perpendicularly under a succeeding electrode wire 1b, i.e. magnetic vector H, giving fixed magnetic field at all times, and changing the direction of welding current of the preceding electrode P1, i.e. the direction of current vector I, with the passage of time. At this time, the intensity of the magnetic field that makes magnetic flux density (unit: gauss) under the electrode wire 1a at least >=1/4 of welding current value (unit: ampere) is maintained. To give the magnetic field 8, there are various ways such as providing an electrode solenoid around the electrode wire 1b. |
