Apparatus for carrying out the feed movement of a formed for friction stir welding head

The invention relates to a device for carrying out the feed movement of a formed for friction stir welding head wherein the welding head and at least one drive module are guided in two mutually parallel guide rails. The centrally arranged between the guide rails welding head and at least one drive module are connected to each of the two guide rails with modules. At least those modules which are connected to the drive module are formed for guiding and temporary locking on the guide rails. The drive module and welding head are connected via a tensile and / or compressive force-transmitting member to each other, whereby the advancing movement can be achieved by changing the length of the element between the drive module and welding head, with simultaneous activation of fixing of modules for guiding and locking of the drive module.