Abstract: The present invention concerns a converter unit comprising an ultrasonic transmission element having a transmission surface for transmitting an ultrasonic vibration to a tool which can be fixed to the transmission surface or to a material which is in contact therewith in the longitudinal direction along a longitudinal axis of the ultrasonic transmission element, and at least one ultrasonic transducer for generating an ultrasonic vibration with a propagation direction which is not oriented along the longitudinal direction, wherein the converter unit has an ultrasonic natural frequency.

Abstract: The present invention concerns an apparatus for ultrasonic processing of materials having an ultrasonic processing system comprising an ultrasound generator, a converter, a sonotrode and a counterpart tool and a feed unit with which the sonotrode and the counterpart tool can be moved towards each other or away from each other, wherein there is provided a force sensor with which the force that the ultrasonic processing system exerts on the materials to be processed can be measured. To provide a corresponding ultrasonic processing apparatus which allows a greater processing speed it is proposed according to the invention that the force sensor is a piezoelectric sensor whose output is converted into an electrical voltage by means of a charge amplifier and that there is provided a control device which either when the ultrasonic processing is not performing material processing short-circuits the piezoelectric sensor or adds a time-varying force compensation unit to the value measured by the piezoelectric sensor.

Abstract: The present invention concerns a processing element for processing a material, like for example a sonotrode or an anvil, comprising a carrier surface which is substantially in the form of a cylinder or in the form of a segment of a cylinder and which is intended to come into contact with the material during processing, wherein the processing element is intended to be rotated about its longitudinal axis during processing so that the carrier surface rolls on the material to be processed, wherein arranged on the carrier surface is at least one structure element which projects beyond the carrier surface in the radial direction, wherein the structure element has a top side which is provided to come into contact with the material to be processed.

Abstract: The invention relates to a method for producing a transverse sealing seam in a tubular bag (6) having a longitudinal sealing seam (5), wherein the tubular bag (6) is passed through between a sonotrode (1) and an anvil (2) and, in order to produce the transverse sealing seam, the sonotrode (1) and the anvil (2) are moved toward each other so that a welding force is applied to the tubular bag (6). In order to provide a method and transverse sealing device with which the stated disadvantages can be overcome at least reduced, the longitudinal sealing seam (5) is moved through a gap (8, 7?) formed in the sonotrode (1) or the counter tool (2) at least during the application of the welding force.

Abstract: The present invention concerns A sonotrode with a wheel-shaped portion having a wheel axis and of a diameter d, which has two substantially circular main surfaces and a substantially cylindrical sealing surface of the width b, that connects the main surfaces. To provide a corresponding sonotrode in which the triangular frequency differs markedly from the main frequency it is proposed according to the invention that at least one main surface has a non-central thickened portion which in a sectional view perpendicularly to the main surface has a convex region which is not arranged on the wheel axis.

Abstract: The present invention relates to a method for reshaping a workpiece, in which a reshaping force is exerted on the workpiece by means of a reshaping tool and the workpiece is heated during or before the reshaping of the workpiece, wherein the heating of the workpiece is performed by the at least partial absorption of an ultrasonic vibration in the workpiece. In order to provide a method and a device for reshaping a workpiece that avoids the aforementioned. disadvantages, in particular when reshaping materials with a highly temperature-dependent damping constant, it is proposed according to the invention that, before the reshaping force is applied to the workpiece, at least a first portion of the workpiece is brought to a temperature which differs from the temperature of a second portion of the workpiece that comes into contact with the reshaping tool.

Abstract: The present invention concerns an apparatus for ultrasonic processing of a material web having an ultrasonic vibration unit which has a sonotrode and a converter connected thereto optionally by way of an amplitude transformer, and a counterpart tool, wherein for processing of the material web the web is moved through a gap between the sonotrode and the counterpart tool, wherein the ultrasonic vibration unit is fixed to a carriage moveable relative to the counterpart tool so that the ultrasonic vibration unit can be moved together with the carriage in the force direction, that is to say in the direction of or away from the counterpart tool, wherein there is provided a force sensor for measuring the force applied to the sonotrode by the material web.

Abstract: The present invention relates to a device for the ultrasonic processing of materials, which has an ultrasonic processing system, which comprises: an ultrasound generator, a converter (12), a sonotrode (16), and a counter tool (18); wherein the sonotrode (16) and/or the counter tool (18) has a substantially cylindrical sealing surface having at least one elevation (45) and can be rotated such that, during the processing, the elevation (45) rotates about the axis of rotation and comes in contact with the material web (20) during a sealing time, wherein a control apparatus (24) is provided for the ultrasound generator, to which control apparatus a feedback variable from the ultrasound processing system is fed and which control apparatus determines a manipulated variable therefrom and feeds said manipulated variable to the ultrasound generator, wherein a process variable from the processing process is determined and is linked to the manipulated variable determined by the control apparatus (24) before the feeding

Abstract: The present invention concerns an apparatus for ultrasonic welding of at least two material webs comprising a processing sonotrode which can be excited with an ultrasonic vibration, a processing counterpart tool and a material web guide which is so designed that the material web can be passed through between the processing sonotrode and the processing counterpart tool, in which there is provided a device for heating at least one material web prior to the welding operation. To provide an ultrasonic welding apparatus which avoids the stated disadvantages and which nonetheless provides a high processing speed it is proposed according to the invention that the device for preheating at least one material web has a preheating sonotrode which can be excited with an ultrasonic vibration.

Abstract: The present invention concerns an apparatus for ultrasonic processing of a material web having an ultrasonic vibration unit which has a sonotrode and a converter connected thereto optionally by way of an amplitude transformer, and a counterpart tool, wherein for processing of the material web the web is moved through a gap between the sonotrode and the counterpart tool, wherein the ultrasonic vibration unit is fixed to a carriage moveable relative to the counterpart tool so that the ultrasonic vibration unit can be moved together with the carriage in the force direction, that is to say in the direction of or away from the counterpart tool, wherein there is provided a force sensor for measuring the force applied to the sonotrode by the material web.

Abstract: The invention relates to an ultrasound welding device (1) for ultrasonic machining of a material by means of a sonotrode (2) mounted in a vibration-decoupled manner, which sonotrode comprises a sealing surface having a cylinder barrel shape, and a counter tool (8), wherein a converter is connected to the sonotrode (2) optionally via a first amplitude transformation unit and the sonotrode (2) and the first converter are designed in such a manner that the sonotrode (2) can be set into vibration by means of a natural vibration of the ultrasonic frequency fS.

Abstract: The present invention concerns A sonotrode with a wheel-shaped portion having a wheel axis and of a diameter d, which has two substantially circular main surfaces and a substantially cylindrical sealing surface of the width b, that connects the main surfaces. To provide a corresponding sonotrode in which the triangular frequency differs markedly from the main frequency it is proposed according to the invention that at least one main surface has a non-central thickened portion which in a sectional view perpendicularly to the main surface has a convex region which is not arranged on the wheel axis.

Abstract: The present invention relates to an ultrasonic sonotrode with a main sonotrode body and a sealing area arranged on one side of the main sonotrode body. The main sonotrode body has two through-slits extending in or through the main sonotrode body respectively along a slit axis. These through-slits intersect in such a way that a through-channel through the main sonotrode body is formed from the one through-slit into the other through-slit. This creates a slit portion that is formed both by the one through-slit and the other through-slit. Provided in this main sonotrode body is a processing channel, which extends along a processing channel axis from a side area of the main sonotrode body up to the through-channel and is arranged substantially symmetrically about the processing channel axis.

Abstract: The invention relates to an ultrasonic welding apparatus for ultrasonic machining of a material, having at least two sonotrodes and a converter device, which converts an electrical AC voltage into an ultrasonic vibration and sets the at least two sonotrodes in ultrasonic vibration, the at least two sonotrodes being arranged in such a manner that the material to be machined is arranged between them during machining and can at the same time be machined by the at least two sonotrodes. To specify an ultrasonic welding apparatus that allows effective material machining without an undesirable interaction occurring between the two sonotrodes, the converter device according to the invention excites the first sonotrode at a frequency fs1 and the second sonotrode at a frequency fs2, fs2 being greater than fs1.

Abstract: The present invention relates to a method for determining the oscillation amplitude of a sonotrode excited by a converter, wherein the converter is connected to a current generator and the current IE(t) provided by the current generator and flowing through the converter is measured. According to the invention, in order to provide a method for determining the oscillation amplitude of a sonotrode excited by a converter, the voltage UE(t) applied to the converter by the current generator is measured and the oscillation amplitude of the sonotorode or a field quantity of the electrical oscillation system comprising the current generator and the converter, said field quantity being related to the oscillation amplitude of the sonotrode, is calculated from the measured voltage UE(t) and from the measured current IE(t).

Abstract: The present invention relates to an output stage for adapting an AC voltage signal of an ultrasound generator to a converter connectable to the output stage, wherein the output stage has two input terminals for receiving the AC voltage produced by the ultrasound generator and two output terminals for outputting an adapted AC voltage, as well as an output transformer with a primary coil having a number n1 turns and a secondary coil with a number n2 turns, the output transformer having a main inductance LH as well as a leakage inductance L?, the two input terminals being connected to one another via the primary coil and the two output terminals being connected to one another via the secondary coil.

Abstract: The present disclosure relates to a device for the ultrasonic processing of a workpiece using an ultrasonic resonator and optionally a counter-die, the workpiece lying against the ultrasonic resonator and the ultrasonic resonator having a converter, a booster and a sonotrode. According to the disclosure, an additional booster is provided between the converter and the sonotrode and both boosters carry a holder for the ultrasonic resonator.

Abstract: The present invention concerns a sonotrode for a device for continuously processing material webs by means of ultrasound. To provide a sonotrode and an ultrasonic processing device having a sonotrode which is simple to produce and ensures reliable transverse sealing seam production, wherein the energy consumption of the sonotrode is low and the sonotrode also has a high level of rotational truth accuracy and adequate stiffness, it is proposed according to the invention that the sonotrode comprises a substantially roller-shaped core and at least two bars, wherein the bars extend in the direction of the core axis and each have a sealing surface facing away from the roller-shaped core.

Abstract: The present invention relates to an ultrasonic welding device with a generator for generating a high-frequency a.c. voltage, a converter for converting the a.c. voltage into a mechanical ultrasonic vibration and a sonotrode for transmitting the ultrasonic vibration to material to be worked, wherein the converter and the sonotrode are rotatable and a rotary coupler is arranged between the generator and the converter for the transmission of electrical energy from a static arrangement to a rotating arrangement, comprising a stationary element and an element that is rotatable in relation to the stationary element, wherein the stationary element comprises a primary circuit with two input terminals, which are connected to each other by means of a second coil with M turns, wherein the first and second coils are arranged in such a way that, when an a.c. voltage is applied to the input terminals, the magnetic field generated by the first coil induces an a.c. voltage in the second coil.

Abstract: The present invention concerns an ultrasonic oscillating unit comprising a converter and a sonotrode (1) optionally connected to the converter by way of an amplitude transformer (2), wherein the sonotrode (1) has a sealing surface (10) which is substantially in the form of a circular ring or a cylinder surface and the ultrasonic oscillating unit has a holder (3) for fastening the ultrasonic oscillating unit to a machine stand. To achieve that it is proposed according to the invention that the holder (3) is fastened directly to the sonotrode (1).