Abstract: A method welds together two components of an internal combustion engine exhaust system, by resistance welding, to provide greater positioning freedom of two components welded together. A first component is provided with a welding area including an insertion opening edge surrounding an insertion opening. A second component is provided with a welding area including an insertion area to be inserted into the insertion opening. The insertion area is inserted into the insertion opening such that the insertion area is in contact with the first the entire insertion opening edge. An electrical voltage is applied to resistance weld the first component to the second component. The surface (28) of the insertion area is curved about two axes that are not parallel or is curved about an axis that is parallel to the surface of the insertion area, or/and an insertion surface of the insertion opening edge is located in one plane.

Abstract: An exhaust gas flap, especially for the exhaust gas stream of an internal combustion engine, includes a flap tube (22) and a flap diaphragm (24) carried in an interior of the flap tube on a pivot shaft (16) rotatable about a pivot axis. A flap wing (28, 30) is mounted on the pivot shaft (16) and a wing stop (32, 34) is associated with the flap wing (28, 30) on an inner circumferential area of the flap tube. The flap wing (28, 30) has a mounting area (56, 58) with uncurved mounting surfaces (60, 64). Opposing mounting surfaces (62, 66) or/and a mounting recess (52, 54) at the pivot shaft (16) provide an opposing mounting area that at least partially receives the flap wing mounting area (56, 58) of the flap wing (28, 30), the opposing mounting area being provided on the outer circumferential area of the pivot shaft (16).

Abstract: An exhaust gas flap, especially for the exhaust gas stream of an internal combustion engine, includes a flap tube (22) and a flap diaphragm (24) carried in an interior of the flap tube on a pivot shaft (16) rotatable about a pivot axis. A flap wing (28, 30) is mounted on the pivot shaft (16) and a wing stop (32, 34) is associated with the flap wing (28, 30) on an inner circumferential area of the flap tube. The flap wing (28, 30) has a mounting area (56, 58) with uncurved mounting surfaces (60, 64). Opposing mounting surfaces (62, 66) or/and a mounting recess (52, 54) at the pivot shaft (16) provide an opposing mounting area that at least partially receives the flap wing mounting area (56, 58) of the flap wing (28, 30), the opposing mounting area being provided on the outer circumferential area of the pivot shaft (16).

Abstract: A method welds together two components of an internal combustion engine exhaust system, by resistance welding, to provide greater positioning freedom of two components welded together. A first component is provided with a welding area including an insertion opening edge surrounding an insertion opening. A second component is provided with a welding area including an insertion area to be inserted into the insertion opening. The insertion area is inserted into the insertion opening such that the insertion area is in contact with the first the entire insertion opening edge. An electrical voltage is applied to resistance weld the first component to the second component. The surface (28) of the insertion area is curved about two axes that are not parallel or is curved about an axis that is parallel to the surface of the insertion area, or/and an insertion surface of the insertion opening edge is located in one plane.