Friction welding device

A friction-welding device for integrally joining components, each component including a welding surface, comprising:

• an oscillator adapted to generate a defined periodic movement of one of the components and the welding surface of the one of the components relative to another one of the components that is held statically during welding and to the welding surface of the another one of the components, the period movement including directions of movement parallel to the welding surfaces;
• a compression device adapted to press the welding surfaces of the one of the components and the another one of the components against each other at a defined force;
• and
• a cartridge adapted to accommodate the one of the components outside of a welding zone;
• wherein the oscillator includes an even number of piezoactuators arranged in pairs at least approximately on a line of application, the piezoactuators prestressable with respect to the cartridge under pressure generation from opposite sides by piezoelectric liner deformation, the piezoactuators displaceable with the cartridge and the one of the components synchronously oscillatingly at cartridge-side ends.