Method and apparatus for producing a metallic structure with overlapping welded joint areas

A process for producing a metallic, low-torsion construction with connecting portions which are formed by a first and a second overlapping component that define an overlapped area of ​​contact, wherein the connection regions consist of a material by frictional heat at ambient conditions in a deformable solid plastic state can be converted, by means of a Ruhrreib welding tool having a rotatable middle section, which has an extension which is connected to the connecting portion is engaged and a friction generating pin which is rotatably connected to the center piece about a pin axis to the overlapping components progressively to penetrate, when the connecting section is in contact with the pin is plastically characterized, in that in a frame structure with partly hollow struts - the contact surfaces overlapped with a pin which is extendable optionally by the batch will be processed, - the depth of penetration of the pin is controlled while the tool is moved to the connection portion, - and the pen and ...