Welding-Solid State Welding

Ultrasonic Welding Learning Activities View Slides; Lesson Objectives Read Notes, Listen to lecture Do on-line workbook Lesson Objectives When you finish this lesson you will understand: Ultrasonic Welding Definition, Characteristics, Process & Applications Ultrasonic Power Generation Interfacial Interactions & Dissimilar Metals Welding Keywords: Ultrasonic Welding, Transducer, Sonotrode, Anvil

Definition of Ultrasonic Welding A solid state welding process in which coalescence is produced at the faying surfaces by the application of high frequency vibratory energy while the work pieces are held together under moderately low static pressure.

Ultrasonic Welding Process Clamping force Process Description: Components of ultrasonic welding system include: Transducer Sonotrode Anvil Mass wedge Transducer Sonotrode tip Typical components of an ultrasonic welding system are illustrated in the above figure. Linear ultrasonic vibrations are generated in the transducer and transferred to a sonotrode. The anvil holds the components in a fixed position and supports the clamping force. Vibration Weldment Anvil Force

Ultrasonic Welding Mechanism Clamping force A static clamping force is applied perpendicular to the interface between the work pieces. The contacting sonotrode oscillates parallel to the interface. Combined effect of static and oscillating force produces deformation which promotes welding. Mass wedge Transducer Sonotrode tip 10-75 KHz workpiece Anvil Force

Applications of Ultrasonic Welding Assembling of electronic components such as diodes and semiconductors with substrates. Electrical connections to current carrying devices including motors, field coils, and capacitors. Encapsulation and packaging. Plastic parts

Friction Welding