Welding assembly and method for producing a welding assembly

Welding assembly comprising

• a support part made of a laser radiation-absorbent material;
• at least one first joining surface located on said support part;
• an attachment part, having a longitudinal axis and at least one collar piece formed of a laser radiation-transparent material;
• at least one second joining surface located on said at least one collar piece;
• said second joining surface having a fixed end and a free end;
• said second joining surface being arranged on a peripheral surface of the attachment part parallel to the longitudinal axis,
• said at least one first joining surface and said at least one second joining surface form a joining region;
• said attachment part being laser welded to said support part by a source of laser radiation, thereby forming a welded joint;
• said attachment part having at least one pressing surface, said pressing surface being available for receiving a pressing force acting on the joining region during production of the welding assembly;
• said at least one collar piece being flexible thereby permitting the second joining surface to exhibit, prior to their being joined, a surface contour with respect to an imaginary reference point located on the longitudinal axis and within the first joining surface, which, with respect to the same reference point, has a deviation from the surface contour of the first joining surface that increases or decreases constantly from the fixed end to the free end;
• and
• said attachment part configured for receiving a mandrel which can be placed on or inserted into the attachment part and oriented in the direction of the longitudinal axis so that it can be moved toward and placed the support part by the at least one pressing surface.