| 摘要 |
PURPOSE:To enable good welding without using the welding equipment of a large capacity by executing laser welding by generating the magnetic line of force whose magnetic flux density becomes smaller according to departing to the track from the projection point of the laser light and whose track is in the same direction as the laser light. CONSTITUTION:When a voltage is impressed on a electromagnetic coil 5 by the DC power source 6 for exciting, the magnetic line of force is generated around the coil 5. The welding joint part of the bodies 3, 4 to be welded is irradiated with laser light L in this state. The irradiation part of the laser light in welding joint parts 3a, 4a is melted and the Ar of an argon gas as the shielding gas of shielding this part is ionized. A generated plasma P is closed in a melting part 7 by the direction of a magnetic line of force, the energy of the laser light L is absorbed to the plasma P, the melting of the melting part 7 is promoted and no laser light L is passed through the gap between the bodies 3, 4 to be welded. |
