An exhaust line element includes an exhaust volume comprising a metal enclosure with a thickness smaller than 1 mm and at least one metal plate with a thickness comprised between 0.5 and 5 mm. The metal plate comprises a central part that does not contact the metal enclosure and between 2 and 4 fastening tabs are secured to the central part. Each fastening tab is spot and transparently welded to the metal enclosure.

A method for welding a zinc coated steel sheet is provided. The method for welding a zinc coated steel sheet of the present invention is a method for welding a zinc coated steel sheet by using a welding material, wherein when welding, the welding current is 150-300 A, a shielding gas is a mixed gas of Ar+10-30% CO2, and the welding polarity is alternately altered so that the welding polarity fraction defined by relational equation 1 satisfies the range of 0.25-0.35.

A method for welding a zinc coated steel sheet is provided. The method for welding a zinc coated steel sheet of the present invention is a method for welding a zinc coated steel sheet by using a welding material, wherein when welding, the welding current is 150-300 A, a shielding gas is a mixed gas of Ar+10-30% CO2, and the welding polarity is alternately altered so that the welding polarity fraction defined by relational equation 1 satisfies the range of 0.25-0.35.

An underbody of a vehicle includes: a floor member formed through extrusion to extend in a width direction of the vehicle. The floor member is provided in plural such that a plurality of floor members is continuously disposed to be adjacent to one another in a longitudinal direction of the vehicle. Upper surfaces of the floor members constitute a floor of the vehicle, and lower surfaces of the floor members constitute an upper battery case. The underbody further includes first welding areas each formed in a boundary area between the lower surfaces of adjacent ones of the floor members, to interconnect the adjacent floor members. The first welding areas are formed through friction stir welding and extend in the width direction of the vehicle.

An underbody of a vehicle includes: a floor member formed through extrusion to extend in a width direction of the vehicle. The floor member is provided in plural such that a plurality of floor members is continuously disposed to be adjacent to one another in a longitudinal direction of the vehicle. Upper surfaces of the floor members constitute a floor of the vehicle, and lower surfaces of the floor members constitute an upper battery case. The underbody further includes first welding areas each formed in a boundary area between the lower surfaces of adjacent ones of the floor members, to interconnect the adjacent floor members. The first welding areas are formed through friction stir welding and extend in the width direction of the vehicle.

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

An orbital welding device (1) for welding two pieces of pipe, the orbital welding device (1) having a welding current source (10) in a welding current source housing (11) and an orbital welding head (20), which is separate from the welding current source housing (11) and is connected to the welding current source (10) by a cable (2), the orbital welding head (20) having a chamber (50) for the use of shielding gas (50) and/or the orbital welding device (1) having a purging device (90) for the use of shielding gas, preferably back-up shielding gas or purge gas, the orbital welding device (1) having an oxygen sensor (40), wherein the oxygen sensor (40) is arranged in or on the welding current source housing (11).

An orbital welding device (1) for welding two pieces of pipe, the orbital welding device (1) having a welding current source (10) in a welding current source housing (11) and an orbital welding head (20), which is separate from the welding current source housing (11) and is connected to the welding current source (10) by a cable (2), the orbital welding head (20) having a chamber (50) for the use of shielding gas (50) and/or the orbital welding device (1) having a purging device (90) for the use of shielding gas, preferably back-up shielding gas or purge gas, the orbital welding device (1) having an oxygen sensor (40), wherein the oxygen sensor (40) is arranged in or on the welding current source housing (11).

An orbital welding device (1), having a welding current source (10) in a welding current source housing (11) and an orbital welding head (20), which is separate from the welding current source housing (11) and is connected to the welding current source (10) by a cable (2), the orbital welding head (20) having a pipe mount (21) and a welding electrode holder (22) for holding a welding electrode (23). An electric motor (31) is designed to drive the welding electrode holder (22) and thus turn it with respect to the pipe mount (21). The orbital welding head (20) has a chamber (50) for shielding gas. An optical oxygen sensor (40) is designed to measure an oxygen concentration in a measuring region (51) in the chamber (50). The oxygen sensor (40) is arranged outside the chamber (50) and is optically coupled to the measuring region (51) by an optical coupling.

An orbital welding device (1), having a welding current source (10) in a welding current source housing (11) and an orbital welding head (20), which is separate from the welding current source housing (11) and is connected to the welding current source (10) by a cable (2), the orbital welding head (20) having a pipe mount (21) and a welding electrode holder (22) for holding a welding electrode (23). An electric motor (31) is designed to drive the welding electrode holder (22) and thus turn it with respect to the pipe mount (21). The orbital welding head (20) has a chamber (50) for shielding gas. An optical oxygen sensor (40) is designed to measure an oxygen concentration in a measuring region (51) in the chamber (50). The oxygen sensor (40) is arranged outside the chamber (50) and is optically coupled to the measuring region (51) by an optical coupling.