| 摘要 |
PURPOSE:To prevent the adhesion of spatters, to improve the separating thereof and to prevent the short-circuit between the chip and a body to be welded by forming the nozzle member with the nonconductive material of ceramics, etc. CONSTITUTION:The nozzle has the supporting ring 2 to be fitted to the tip part of a welding torch 1, the cylindrical nozzle member 3 to be fitted to the tip side of the supporting ring 2 and the holding ring 4 to be arranged on the outer peripheral part of the supporting ring 2 and nozzle member 3 for fixing the nozzle member 3 to the supporting ring 2. The nozzle member 3 is formed by the nonconductive material of ceramics, etc. having the projecting part 8 to the external part in the radial direction at the one end side thereof. The holding ring 4 has the engaging face 9 engaging with the projecting part 8 on the inner peripheral part. On the holding ring 4 the press deforming part 13 fitting to a step part 12 by fitting to the inner part in the diameter direction is formed. The ring 4 is fixed to the ring 2 by the deforming part 13 and the nozzle member 3 is fixed to the ring 2 by the ring 4.
|
