| 摘要 |
PURPOSE:To increase a penetration depth and to reduce the running cost in welding by feeding a flux by the necessary and optimum quantity on a weld line and by using the flux as a shielding material. CONSTITUTION:The flux powder 9 necessary and optimum for shielding is piled up on the weld line L - L of a welding butt joint 7. A butt welding is performed by a laser beam 5 along the weld line L-L via the condenser lens 2 protected by using the gaps 6 for the lens protection. The shielding gas of expensive helium, argon gas, etc. becomes unnecessary because of the inexpensive flux powder 9 piled up on the weld line L-L by the necessary and optimum quantity acting as the shielding material in advance. Moreover with the exothermic reaction of the energy of the laser beam 5 and the flux material the temp. on the welding zone is raised and the penetration depth is increased. Consequently the running cost is thus reduced as well as the increase in the penetration depth. |
