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AssigneeSchunk Sonosystems GmbH
InventorStefan Mueller
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The invention relates to a method for positioning weldments (20) in an ultrasonic welding device (34) and to an ultrasonic welding device comprising a sonotrode (14), to which ultrasonic vibrations are applied and which emits longitudinal vibrations, and an anvil (16), a weldment accommodation (19) being formed between a work surface (17) of the sonotrode (14) and an opposing surface (18) of the anvil (16), a change in position Δx of a positioning device (21) defining weld position P of the weldment (20) being captured in the longitudinal direction (22) of the sonotrode (14) by means of a position sensor, the application of vibrations to the sonotrode (14) being changed such depending on the change in position Δx that a change in amplitude Δy is performed according to an amplitude characteristic curve of the sonotrode (14).
A method for positioning weldments (20) in an ultrasonic welding device (34) comprising a sonotrode (14), to which ultrasonic vibrations are applied and which emits longitudinal vibrations, and an anvil (16), a weldment accommodation (19) being formed between a work surface (17) of the sonotrode (14) and an opposing surface (18) of the anvil (16), a change in position Δx of a positioning device (21) defining weld position P of the weldment (20) being captured in the longitudinal direction (22) of the sonotrode (14) by means of a position sensor, characterized in that the application of vibrations to the sonotrode (14) is changed such depending on the change in position Δx that a change in amplitude Δy is performed according to an amplitude characteristic curve of the sonotrode (14).
An ultrasonic welding device (34) comprising a sonotrode (14), to which ultrasonic vibrations are applied and which emits longitudinal vibrations, and an anvil (16), a weldment accommodation (19) being formed between a work surface (17) of the sonotrode (14) and an opposing surface (18) of the anvil (16), the ultrasonic welding device (34) comprising a positioning device (21) for capturing weld position P of the weldment (20) with respect to the work surface (17) in the longitudinal direction (22) of the sonotrode (14), the positioning device (21) being provided with a position sensor (23) for capturing weld position P, characterized in that the position sensor (23) is connected to a generator (28) of the ultrasonic weld device (34) via a characteristic curve processor (27) in such a manner that a change in amplitude Δy is performed according to the amplitude characteristic curve of the sonotrode (14) by means of the characteristic curve processor (27) depending on a change in position Δx.
Dependencies are inferred from the claim text.