END ASSEMBLY FOR A WELDING DEVICE WITH DIFFUSER SLEEVE AND INSERT HAVING BOTH HOLE ; METHOD OF CONTROLLING A FLOW OF GAS IN A WELDING DEVICE

摘要

An end assembly (10) for being used with a welding device having a chamber (50) between the diffuser sleeve (20) and the insert (40) which allows for cooling the insert (40) and for controlling the flow of gas through the end assembly (10). Some of the components of the end assembly (10) such as the contact tip (32), insert (40) and gooseneck (12) are constructed of a conductive material which are securely held together in contact by a diffuser sleeve (20) constructed of a dissimilar material. The end assembly (10) provides better conductivity of the current through the end assembly (10) for use of less energy during welding.