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Converter unit

A converter and ultrasonic transducer technology, applied in non-electric welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of high mechanical load heating effect energy loss, transmission elements not prevailing, etc.

Active Publication Date: 2016-09-21
HERRMANN ULTRACHALLTECHNIK GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Those additional vibration modes are essentially undesired bending modes, which however are also excited in operation and thus lead to higher mechanical loads on the transducer and undesired heating effects and thus increased energy loss, so that this kind of transfer element does not prevail

Method used

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Embodiment Construction

[0039] Figures 1 to 3 Various views of a converter unit 1 according to the invention are shown. The transducer unit 1 has an ultrasound transmission element 2 comprising a cuboidal base part 4 and two arms 3 extending in the longitudinal direction. The longitudinally extending arm 3 is of cylindrical configuration and has a corresponding threaded hole 5 on its end face for fastening a tool such as a welding electrode. The ultrasonic transmission element 2 is subjected to longitudinal ultrasonic vibrations at least on the end face, on which the tool to be excited is fixed. Thus, in the case of resonance, the maximum value of the vibration is formed at the end face, and the vibration node of the longitudinal vibration is generated at the center point of the ultrasonic transmission element 2 .

[0040] Figure 4A perspective view of the ultrasound transmission element 2 is shown. Two longitudinal arms 3 are visible extending from the cuboidal body, and one of them has a tran...

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Abstract

The invention relates to a converter unit comprising an ultrasonic transmission element having: a transmission surface for transmitting an ultrasonic vibration to a tool that can be attached to the transmission surface, or to a material that is in contact with same, in a 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 that is not oriented along the longitudinal direction, wherein the converter unit has an ultrasonic natural frequency. In order to provide a converter unit comprising an ultrasonic transmission element having: a transmission surface for transmitting an ultrasonic vibration to a tool that can be attached to the transmission surface, or to a material that is in contact with same, in a 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 that is not oriented along the longitudinal direction, wherein the converter unit has an ultrasonic natural frequency by means of which a high vibration energy can be generated, according to the invention, the ultrasonic transducer is arranged in the propagation direction in a region of + / -lambda / 4 about the longitudinal axis of the ultrasonic transmission element, where lambda is the wavelength of the vibration belonging to the ultrasonic natural frequency.

Description

technical field [0001] The invention relates to a transducer unit and an ultrasonic vibration unit having the transducer unit. Background technique [0002] Ultrasonic treatment of materials is of increasing importance, especially in packaging technology. [0003] Thus, for example, EP 1 514 670 A2 discloses a device for continuously joining and / or strengthening a material web by means of ultrasound, wherein welding electrodes in the form of rotating rollers are arranged at diametrically oppositely arranged counterpart tools, and wherein the material The web is passed between the electrode and the counter tool for continuous reinforcement and / or bonding of the web of material. The welding electrode is excited by ultrasonic vibrations by means of an ultrasonic transducer which is axially mounted through the amplitude conversion section. Ultrasonic transducers with suitable piezoelectric elements generally convert alternating voltages into mechanical vibrations. The ultraso...

Claims

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Application Information

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IPC IPC(8): B06B3/00B23K20/10
CPCB06B3/00B23K20/106
Inventor J·格梅纳T·法斯塔卡U·沃格勒
Owner HERRMANN ULTRACHALLTECHNIK GMBH & CO KG
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