Process and apparatus for orbital welding of a cylindrical piece on a curved wall.

摘要

The welding electrode (21) moves rotationally about the axis (23) of the cylindrical piece, so as to lay down, one on the other, layers each covering the entire width of the bevel (16). The speed of rotation of the electrode (21) about the axis (23) of the cylindrical piece (14) is varied and the electrode (21) is moved translationally along the direction of the axis of the cylindrical piece. The device includes means for adjusting the speed of rotation of the electrode (21) and means for moving the electrode along the direction of the axis (23). The process may be used in particular to weld a replacement adaptor (14) to the head of the vessel (1) of a nuclear reactor. <IMAGE>