Patent FR-2980383-A1 (FR)
Title: Assembly, useful for co-operating torch with connection block, comprises torch with torch body with external peripheral wall, internal coolant circuit, internal drain of gas supply, and connection block that is provided with front face
Inventor: AGOSTINHO TELMO
IPC: B23K9/167
Filed: 2011-09-22
Abstract: The assembly comprises a torch (10) including a torch body (7) with an external peripheral wall (8), an internal coolant circuit that conveys a cooling liquid within the torch body and enters a water input orifice and a water output orifice (12), where the input and output orifices are carried by first pawns (1, 2) provided with of a sealing unit, and an internal drain of gas supply to convey gas within the torch body between gas input orifices and a plasma-producing chamber located around a non-fusible electrode, where each gas input orifice is carried by a second pawn with the sealing unit. The assembly comprises a torch (10) including a torch body (7) with an external peripheral wall (8), an internal coolant circuit that conveys a cooling liquid within the torch body between a water input orifice and a water output orifice (12), where the input and output orifices are carried by first pawns (1, 2) provided with a sealing unit, an internal gas supply pipe to convey gas within the torch body between gas input orifices and a plasma-producing chamber located around a non-fusible electrode, where each gas input orifice is carried by a second pawn provided with the sealing unit, an internal electric circuit for conveying an electrical current within the torch body and including first and second electric connectors, where the first and second pawns and the electric connectors are arranged on a level of the external peripheral wall to cover an outside compared to the external peripheral wall, a connection block that is provided with a front face and includes an internal line for supplying cooling liquid, an internal line for evacuating a cooling liquid and an internal line for supplying gas, where the lines are formed on the level of the front face to receive the first and second pawns of the torch and to ensure a fluidic continuity between the connection block and the torch in a watertight manner, and two electric lines including connection elements on the level of the front face of the connection block, where each connection element ensures an electric connection with the first and second electric connectors of the torch. The torch body has a cylindrical-truncated form. The sealing unit includes O-rings. The torch body includes multiple internal pipes for supplying gas within the torch body as the gas input orifices. The electric connectors are split pawns. The internal coolant circuit and the internal gas supply pipes have a fluid passage diameter equal or quasi-equal to a diameter of the internal lines for supplying the cooling liquid and evacuating of the cooling liquid and the internal lines of gas supply. A longitudinal axis of the first and second pawns is perpendicular or quasi perpendicular to an axis of the electrode. The torch is maintained interdependent of the connection block by a screw element including thrusts of tightening and loosening. The external peripheral wall is surrounded by an upper wall within which an opening is arranged to extract the electrode, and the opening is normally sealed by a lid. An independent claim is included for a method for welding tungsten inert gas or plasma implementing an assembly.