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Joint: The weld surfaces.
Parameter: A unique factor or element which affects the welding operation in a particular
mode.
Parameter Range: Valid range of parameters accepted for a particular setup.
Power Supply: The electronic instrument in an ultrasonic assembly system which
changes conventional 50/60 Hz electrical power into high frequency electrical power at
20 kHz, 30 kHz or 40 kHz.
Seek: The activation of ultrasonics at a low-level (10%) amplitude, for the purpose of
finding the resonant frequency of the stack.
Staking: The process of melting and reforming a plastic stud to mechanically lock a
dissimilar material in place.
Swaging: The process of capturing another component of an assembly by melting and
reforming a ridge of plastic.
Thermoplastic: A polymer which undergoes a reversible change of state when subjected
to heat.
Thermoset: A polymer which undergoes an irreversible change when subjected to heat.
Ultrasonic Power: Presence of ultrasonic power at the horn face.
Ultrasonic Welding: The use of ultrasonic vibrations to generate heat and subsequently
melt the mating surfaces of two thermoplastic parts. When ultrasonic vibrations stop, the
molten material resolidifies, and a weld occurs.
User ID: A unique number used to keep track of user access to the web page interface.
Weld System: A combination of components required to perform an ultrasonic operation.
Usually consists of a power supply, converter, booster, and horn, with either an actuator or
a handheld device, or in a fixed, mounted location.
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