Method for welding together two components, preferably of an exhaust system of an internal combustion engine, by resistance welding

A method for welding together two components of an exhaust system of an internal combustion engine, by resistance welding, the method comprising the steps of:

• providing a first component comprising an insertion rim defining an insertion opening, the insertion rim having a rim surface starting out from an insertion opening rim edge and extending along a thickness of the first component, wherein the insertion rim defines a first component welding area;
• providing a second component comprising an insertion end portion area to be inserted into the insertion opening of the first component, wherein an insertion area end portion surface of the insertion end portion area defines a second component welding area, wherein the second component extends in a direction of a second component longitudinal center axis and the insertion end portion area defines an axial end area of the second component;
• inserting the insertion end portion area into the insertion opening such that the second component longitudinal center axis is not parallel to an insertion opening center axis of the insertion opening and that the insertion area end portion surface is in contact with the first component essentially over the entire circumference of the insertion opening;
• and
• applying an electrical voltage to the first component and the second component for the resistance welding of the first component to the second component, wherein:
• the insertion area end portion surface is curved about two axes that are not parallel to one another or wherein:
• the insertion area end portion surface is curved about an axis that is parallel to the insertion area end portion surface or wherein:
• an insertion edge of the insertion rim defining the insertion opening is not in one plane or wherein:
• the insertion area end portion surface is curved about two axes that are not parallel to one another or the insertion area end portion surface is curved about an axis that is parallel to the insertion area end portion surface and the insertion edge of the insertion rim defining the insertion opening is not in one plane.

A method for welding together two components of an exhaust system of an internal combustion engine, by resistance welding, the method comprising the steps of:

• providing a first component comprising an insertion rim defining an insertion opening and a first component welding area, the insertion rim having a rim surface starting out from an insertion opening rim edge and extending along a thickness of the first component;
• providing a second component comprising an insertion end portion area located at an axial end area of the second component, wherein an insertion area end portion surface of the insertion area defines a second component welding area, wherein the second component extends in a direction of a second component longitudinal center axis;
• moving the second component in a direction of the first component such that at least a portion of the insertion end portion area moves into the insertion opening and the second component longitudinal center axis is not parallel to an insertion opening center axis of the insertion opening, wherein the insertion area end portion surface is in contact with the first component at the insertion rim essentially over the entire circumference of the insertion opening;
• and
• applying an electrical voltage to the first component and the second component for the resistance welding of the first component to the second component, wherein:
• the insertion area end portion surface is curved about two axes that are not parallel to one another or wherein:
• the insertion area end portion surface is curved about an axis that is parallel to the insertion area end portion surface or wherein:
• an insertion edge of the insertion rim defining the insertion opening is not in one plane or wherein:
• the insertion area end portion surface is curved about two axes that are not parallel to one another or the insertion area end portion surface is curved about an axis that is parallel to the insertion area end portion surface and an insertion edge of the insertion rim defining the insertion opening is not in one plane.