Patent ID: 8840005
Filing Date: 2014-09-23
Classification: B23K

Abstract:
1. A device for welding metal parts by means of ultrasound comprising a sonotrode with a sonotrode head, which can be excited by a vibration generator to perform torsional vibrations in relation to a torsion axis, wherein at least one welding surface is arranged circumferentially on the sonotrode head, as seen in relation to the torsion axis, and an anvil with a compacting surface is present, wherein the compacting surface is arrangeable opposite the welding surface of the sonotrode, in a fixed state in relation to the welding surface, wherein when the compacting surface is arranged opposite the welding surface, the welding surface and the compacting surface delimit a compacting space, provided for accommodating parts which are to be welded, in a direction perpendicular to the torsion axis; and wherein the sonotrode is designed, and coupled to the vibration generator, such that the sonotrode as a whole can be excited to perform torsional vibration with a negligibly small longitudinal-vibration component.