Depositing additional metal in annular recess in nuclear PWR cover round pipe comprises use of rotary welding torch with metal fusion and supply components

摘要

Additional metal deposition is performed automatically by a welding torch (20) fitted with metal fusion (20') and additional metal supply (21) units. The torch is rotated about an axis (9) aligned in a radial direction relative to the concave surface of the spherical wall of a nuclear pressurized water reactor cover and located at the center of a machined annular recess (7). The rotating torch is moved in a direction (Y) perpendicular to the axis of rotation, and its position is regulated in a direction (Z) parallel to the same axis, so that the additional metal (8) is deposited in the recess (7) in the form of an elliptical welding bead with constant characteristics.