Royal Mechanical Engineering

Making of Ultrasonic Weld: Although the theoretical method of manufacturing an ultrasonic weld is uncomplicated, the interactions of the varied weld parameters are vital and may be understood. When manufacturing an ultrasonic weld, there are 3 primary variables that interact; They are: • TIME the period of applied ultrasonic vibration • AMPLITUDE the longitudinal displacement of the vibration • FORCE the compressive force applied perpendicular (normal) to the direction of vibration Power needed initiating and maintaining vibration (motion) throughout the weld cycle will be defined as: P = F x A Where: P = Power (watts) F = Force (psi) A = Amplitude (microns)   Force = (Surface Area of the Cylinder) X (Air Pressure) X (Mechanical Advanta Energy is calculated as: E = P x T Where: E = Energy (joules) P = Power (watts) T = Time (seconds) Thus the complete ‘Weld to Energy’ process would be defined as: E = (F x A) x T A well designed ultrasonic metal welding s...