Figure 2.5 Pressure Variable With Increased Time; Figure 2.6 Scrubbing Action On Weld Interface - Branson Emerson Ultraseal 20 Operating Manual

2.5.6 Time
The time required to deliver the necessary energy is defined as the Weld Time. For most
welds, the time required will be less than one second. If more energy is required and all
other weld parameters are maintained, the weld time will increase
Figure 2.5
2.5.7 Amplitude
An ultrasonic tool is a resonant acoustical device. The term Amplitude is used to describe
the amount of longitudinal expansion and contraction that the tooling endures as it
vibrates (Figure
interface. This scrubbing action combined with pressure is what advances the weld by a
diffusing or mixing of the base materials.
Figure 2.6
As previously mentioned, the converter/booster/horn, (stack assembly), requires minimal
electrical power to initiate and maintain vibration in a 'no-load' condition. As the amplitude
increases, the power required to maintain the increased velocity of vibration also
increases. Subsequently, because of the increased Power less time is required deliver the
same amount of Energy. This relationship is illustrated in the following power diagram
(Figure 2.7):
20
Pressure Variable with Increased Time
2.6). The amplitude correlates to the scrubbing action at the weld
Scrubbing Action on Weld Interface
(Figure 2.5).
DCM00051 REV. 10