Tool head for attaching an electrical conductor on the contact surface of a substrate and method for implementing the attachment

A tool head for attaching an electrical conductor on a contact surface of a substrate, comprising:

• a vibration exciter for generating linear ultrasonic vibrations;
• a bonding tool adapted to contact at least one of the contact surface and the conductor, the contacting applying a contact pressure to the conductor in a direction of the contact surface via the bonding tool, the conductor being adapted to be welded onto the contact surface with the aid of ultrasonic vibrations transmitted to at least one of the contact surface and the conductor;
• a vibration conductor absorbing the linear ultrasonic vibrations of the vibration exciter;
• and
• a converter situated between the vibration conductor and the bonding tool to convert the linear vibrations into torsional vibrations such that the bonding tool is able to be incited to rotary vibrations about a tool axis of rotation, the tool axis of rotation being approximately coincident with a torsional axis of rotation of the converter and oriented approximately perpendicular to the contact surface of the substrate;
• wherein the vibration exciter generates linear ultrasonic vibrations in a direction approximately parallel to the contact surface of the substrate;
• and
• wherein the converter is a component dynamically balanced with respect to a center axis of the converter, the vibration conductor being laterally secured on a side of the converter so that a center axis of the vibration conductor is oriented perpendicularly to the center axis of the converter.

A tool head for attaching an electrical conductor on a contact surface of a substrate, comprising:

• a vibration exciter for generating linear ultrasonic vibrations;
• a bonding tool adapted to contact at least one of the contact surface and the conductor, the contacting applying a contact pressure to the conductor in a direction of the contact surface via the bonding tool, the conductor being adapted to be welded onto the contact surface with the aid of ultrasonic vibrations transmitted to at least one of the contact surface and the conductor;
• a vibration conductor absorbing the linear ultrasonic vibrations of the vibration exciter;
• and
• a converter situated between the vibration conductor and the bonding tool to convert the linear vibrations into torsional vibrations such that the bonding tool is able to be incited to rotary vibrations about a tool axis of rotation, the tool axis of rotation being approximately coincident with a torsional axis of rotation of the converter and oriented approximately perpendicular to the contact surface of the substrate, wherein the electrical conductor is fed to the bonding tool through the converter, through a feed channel.