Hesse & Knipps Gmbh

Gottfried Wilhelm Leibniz Universitaet Hannover

Joerg Wallaschek

Hans-Juergen Hesse

Piotr Vasiljev

Michael Broekelmann

Sebastian Mojrzisch

Jan Bremer

A piezo actuator includes an actuator body with a plurality of piezo elements and a tensioning device loading the actuator body with a bias. The tensioning device includes a traction device mounted as a biased winding on the actuator body in a plurality of turns around the actuator body. The traction device is at least one of resilient or flexible.

Piezoactuator and a method for producing such a piezoactuator

A bonding device, particularly for producing bond connections between electrical conductors made of wire material or strip material and contact points of substrates such as electrical circuits, wherein the bonding device comprises a bonding head () which can be rotated about a geometric axis of rotation (D), in particular a vertical axis, and on which a bonding tool () and an ultrasonic transducer () are disposed for ultrasonic vibration excitation of the bonding tool (). It is proposed that the main direction of extension () of the ultrasonic transducer () and/or the direction of extension thereof in the direction of the axis of the minimum moment of inertia extends parallel to the geometric axis of rotation (D) of the bonding head (). The invention further relates to a bonding device or an ultrasonic transducer.

Bonding device, ultrasonic transducer, and bonding method

The invention relates to an ultrasonic transducer comprising at least one sensor, particularly for use in ultrasonic bonders. At least one sensor () is arranged in/on a mounting () of the ultrasonic transducer and, in particular, by means of which a transverse extension perpendicular to a propagating exciting ultrasonic wave can be metrologically detected.

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Paderborn, Germany

Joerg Wallaschek