Gas confinement box used in combination with a welding head

摘要

A gas confinement chamber consists of a frame (10), a side member (16) with a seal (17), a cover (9) and a second seal (15) between the frame and underside of the cover. The cover (9) is able to move inside the frame (10), while the welding head is surrounded by a dome (6) which fits into a sleeve (8) passing through the cover perpendicular to its plane and interacts with it via a spherical member (7). The frame is supported by a carriage which moves in the same plane as the cover and has two surfaces with rings of balls (11,12) for the cover to move in.