Abstract: An ultrasonic oscillation system with a converter which can convert an electrical alternating voltage into a mechanical oscillation, and a sonotrode of mass ms, which is intended to be set into oscillation with the mechanical oscillation, the converter being coupled to the sonotrode in such a way that the vibration generated by the converter generates a vibration excitation of the sonotrode, the ultrasonic vibration system being intended to be operated with a vibration of wavelength ?. In order to provide an ultrasonic oscillation system in which the problems described are at least reduced, the ultrasonic oscillation system has a mechanical resonator of mass mr, which can be brought into resonant oscillation with an oscillation of wavelength ?, the mass mr of the resonator being larger than the mass ms of the sonotrode.

Abstract: An ultrasonic oscillation system with a converter which can convert an electrical alternating voltage into a mechanical oscillation, and a sonotrode of mass ms, which is intended to be set into oscillation with the mechanical oscillation, the converter being coupled to the sonotrode in such a way that the vibration generated by the converter generates a vibration excitation of the sonotrode, the ultrasonic vibration system being intended to be operated with a vibration of wavelength ?. In order to provide an ultrasonic oscillation system in which the problems described are at least reduced, the ultrasonic oscillation system has a mechanical resonator of mass mr, which can be brought into resonant oscillation with an oscillation of wavelength ?, the mass mr of the resonator being larger than the mass ms of the sonotrode.

Abstract: The present invention concerns a tool head comprising a machine connection for connecting the tool head to a machine tool, and a tool 5 portion which either has at least one geometrically defined cutting edge or has a receiving means for a tool insert having a geometrically defined cutting edge. To provide a tool head, like a drilling head, and a method with which highly precise machining is possible with very high feed speeds and good surface quality without the cutting edge being exposed to 10 a high rate of wear, it is proposed that there is a converter for converting electrical AC voltage into a mechanical vibration, wherein the converter is arranged, designed and connected to the tool portion so that the unit comprising the converter and the tool portion and possibly a tool insert 15 received in the receiving means can be excited to perform an ultrasonic vibration.