Abstract: An electrode unit for inert gas welding by means of a non-consumable. The electrode unit includes an electrode holder and an electrode held firmly and undetachably in the electrode holder and having an electrode tip at a front end. The electrode protrudes beyond the electrode holder by means of the electrode tip on a first longitudinal end of the electrode holder. A gas guide channel is formed in the electrode holder, with an inlet opening located toward a second longitudinal end of the electrode holder. At least one outlet opening is oriented transversely with respect to a longitudinal extent of the electrode holder and located offset from the inlet opening, when viewed in the direction of the longitudinal extent, toward the first longitudinal end. The electrode unit is able to be efficiently cooled during the welding operation and has a reduced tendency to jam or wedge due to thermal expansions.

Abstract: An electrode unit for inert gas welding by means of a non-consumable. The electrode unit includes an electrode holder and an electrode held firmly and undetachably in the electrode holder and having an electrode tip at a front end. The electrode protrudes beyond the electrode holder by means of the electrode tip on a first longitudinal end of the electrode holder. A gas guide channel is formed in the electrode holder, with an inlet opening located toward a second longitudinal end of the electrode holder. At least one outlet opening is oriented transversely with respect to a longitudinal extent of the electrode holder and located offset from the inlet opening, when viewed in the direction of the longitudinal extent, toward the first longitudinal end. The electrode unit is able to be efficiently cooled during the welding operation and has a reduced tendency to jam or wedge due to thermal expansions.

Abstract: The invention relates to a robot holder for fixing a fluid-cooled joining tool (6) rotatably about a longitudinal axis (L) on a robot arm (2) of a joining robot with a stator (3) that can be fixed on the robot arm (2) and a rotor (4), which comprises a connection for the joining tool (6) and can be rotated about the stator (3), wherein a feed-through (13) for a joining medium, particularly a welding or soldering wire, runs inside the robot holder through the stator and the rotor. For the even more flexible use of such automated joining tools operating with a joining medium on robots, it is desirable to enable for a rotation of the joining tool that is less limited in the angular range, preferably by a range of at least 360° and even more up to rotatability that is delimited by robot parameters but otherwise free, and to create an accordingly adapted passage for cooling fluid.