Method for detecting the making or breaking of contact of a sonotrode with a counter-element
AssigneeHerrmann Ultraschalltechnik GmbH & Co. KG
InventorGerhard Gnad
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Abstract
The present invention concerns a method of detecting the making or breaking of contact of a sonotrode (4) which is caused to vibrate with a frequency f and a vibration amplitude A0 with a counterpart element (5). To provide a method with which contact-making or breaking of a sonotrode with a counterpart element can be particularly quickly and inexpensively detected it is proposed according to the invention that the method has the following steps: a) recording a time configuration of the vibration amplitude A0 (1) during a first measurement time interval ΔT, and b) determining from the time configuration of the vibration amplitude A0 (1) whether making or breaking of contact occurred within the measurement time interval ΔT.
Claims13
A method for controlling an ultrasonic oscillating device which has a sonotrode (4) and a counterpart tool (5) and wherein the counterpart tool (5) is arranged opposite the sonotrode (4) during operation in such a way that a material (7) is arranged between the sonotrode (4) and the counterpart tool (5) for processing by the sonotrode (4), the method comprising:
- A) exciting the sonotrode (4) with an oscillation for a predetermined period of time td and processing the material, the predetermined period of time td being followed by:
- B) carrying out a method for detecting an in-or out-of-contact occurrence of the sonotrode (4), which is set into an oscillation with a frequency f and an oscillation amplitude A0, with the counterpart tool (5);
- the method for detecting comprising:
- a) detecting a time curve of the oscillation amplitude A0(1) during a first measurement period ΔT,
- b) determining from the time curve of the oscillation amplitude A0(1) whether an in-contact or out-of-contact occurrence has taken place within the measurement period ΔT, and
- C) ending the excitation of the sonotrode (4) or moving the sonotrode (4) away from the counterpart tool (5) if an in-contact occurrence between the sonotrode (4) and counterpart tool (5) was detected in step B).
Dependencies are inferred from the claim text.