Abstract: A procedure for squeezing off and sealing a tube, in which the tube is positioned between a sonotrode and an associated anvil, counter electrode, of an ultrasonic device, and the sonotrode is activated and displaced relative to the counter electrode for squeezing off and sealing the tube. In order to enable automatic squeezing off and sealing of a tube without individually entering the data of the tube into an ultrasonic welding device in advance, the invention proposes positioning the tube and fixing it between the sonotrode and the counter electrode, retrieving stored welding parameters on the basis of the characteristic variable and activating the sonotrode and moving the sonotrode and counter electrode in relation towards each other for consolidating and sealing the tube.

Abstract: A method for soldering or deforming a workpiece, according to which a sonotrode of supersonic welding device is placed on the workpiece to be machined and the oscillation amplitude of the sonotrode is modified. In order to optimize the soldering operation, the oscillation amplitude is reduced according to a pre-determined gradient during a predetermined time tx, a characteristic parameter of the workpiece is measured directly or indirectly after time tx, and the sonotrode transmits supersonic energy to the workpiece at a predefined constant or essentially constant amplitude during a period of time time ty, according to the value of the measured parameter.

Abstract: A device is described for welding the ends of electrical conductors, especially strand ends, by means of ultrasonics which comprises a sonotrode, provided with a plurality of different projections, and an anvil, associated with the sonotrode, which anvil is provided with a plurality of different or like recesses which, together with the sonotrode projections, constitute compaction spaces for the strand ends. The anvil is disposed with its longitudinal axis coaxially with the longitudinal axis of the sonotrode, and the cross-sections of the compaction spaces can be simultaneously varied by rotation of the anvil relative to the sonotrode about the common longitudinal axis, so that a plurality of strand ends can be simultaneously welded by only one anvil. Several alternatives for the rotational drive of the anvil are also described.