Patent EP-2457683-A1 (EP)
Inventor: LANG GEORG
IPC: B23K20/10
Filed: 2010-11-25
Abstract: The device comprises a sonotrode (3) with a sonotrode head, which is excitable by a vibration generator (9) in a torsional vibration with respect to a torsional axis, a welding surface that is arranged at the sonotrode head with respect to the torsional axis, an anvil (18) having a compactor area (18.1), which is firmly arranged opposite to the welding surface of the sonotrode with respect to the anvil, and a compression space (8) provided for receiving parts to be welded in a direction perpendicular to the torsional axis. The device comprises a sonotrode (3) with a sonotrode head, which is excitable by a vibration generator (9) in a torsional vibration with respect to a torsional axis, a welding surface that is arranged at the sonotrode head with respect to the torsional axis, an anvil (18) having a compactor area (18.1), which is firmly arranged opposite to the welding surface of the sonotrode with respect to the anvil, and a compression space (8) provided for receiving parts to be welded in a direction perpendicular to the torsional axis, where the compression space limits during an opposite arrangement of the welding surface and the compactor area. The sonotrode is formed and coupled with the vibration generator such that an entire sonotrode is excitable to a torsional vibration having small longitudinal oscillation portion. The vibration generator is formed for producing longitudinal vibrations and is arranged perpendicular to a torsional axis of the sonotrode. The vibration generator for exciting the torsional vibrations is cooperated by the torsional vibrations coupled with the sonotrode. The vibration generator with an actuator acts in a radial distance from the torsional axis at the torsional vibrations. The torsional axis coincides with a longitudinal axis of the torsional vibrations. The sonotrode head transversely protrudes to the torsional axis. The welding surface extends over an entire longitudinal dimension of the sonotrode head towards the torsional axis. The compression area is limited towards the torsional axis on both sides of the welding surface of the sonotrode of an outer and an inner side shift. The outer side shift of the sonotrode in direction of the torsional axis: is upstream to the sonotrode head; and completely covers an end face of the sonotrode. The sonotrode head is partially arranged in an intermediate space between side slides. The distance of the side slides corresponds to the torsional axis of the sonotrode head. The inner and outer side slides are: displaceably arranged with respect to the sonotrode in direction perpendicular to the torsional axis; and stored at a carriage movably guided in the direction perpendicular to the torsional axis opposite to the sonotrode so that the sonotrode in the intermediate space is discharged between the side slides during a displacement of the carriage. The compression area is continuously formed in the direction perpendicular to the torsional axis. The anvil is mounted at the inner side slides so that the anvil is displaceable together with the side slides transverse to the torsional axis, where the anvil is arranged so that the anvil is shifted during the displacement of the carriage or the side slides towards the sonotrode. The anvil is movably stored in direction parallel to the torsional axis so that the anvil is brought into an extended position, in which it protrudes in the longitudinal direction over the side slides and opposite to the compactor area of the welding surface. An independent claim is included for a mobile welding device.