Ultrasonic Welding - Components

Components

All ultrasonic welding systems are composed of the same basic elements:

• A press to put the two parts to be assembled under pressure
• A nest or anvil where the parts are placed and allowing the high frequency vibration to be directed to the interfaces
• An ultrasonic stack composed of a converter or piezoelectric transducer, an optional booster and a sonotrode (US: Horn). All three elements of the stack are specifically tuned to resonate at the same exact ultrasonic frequency (Typically 20, 30, 35 or 40 kHz)
  • Converter: Converts the electrical signal into a mechanical vibration
  • Booster: Modifies the amplitude of the vibration. It is also used in standard systems to clamp the stack in the press.
  • Sonotrode: Applies the mechanical vibration to the parts to be welded.
• An electronic ultrasonic generator (US: Power supply) delivering a high power AC signal with frequency matching the resonance frequency of the stack.
• A controller controlling the movement of the press and the delivery of the ultrasonic energy.