RL35HWV40/GB/N
O
7768/16279
7-1
Elements
7
Elements
7.1
Converter
The converter is a sensitive instrument.
Please handle with great care!
The converter (K) is the core of every ultrasonic welder.
It belongs to the category of piezo-electric converters.
Piezoelectric converters consist of several ceramic disks that
change their size when an electric voltage is applied.
In the case of the ultrasonic welding converter, an alternating
voltage with the nominal frequency (e.g. 35 kHz) is applied. This
electric signal is converted by the piezoelectric elements into a
mechanical vibration of identical frequency.
A mechanical vibration in the axial direction is thus available at the
front end of the converter (K).
The efficiency of a piezoelectric converter is extremely high. The
small losses which occur during the conversion are noticeable in
a rise in temperature of the converter.
Residual heat is dissipated by natural convection thanks to the
special design of the converter.
Special applications require dissipation of heat by additional
ventilation (optional).
The converter must not be warmed up to more than
50°C at the contact point. Converter, horn and gene-
rator may be damaged by overheating.
The converter must be fastened with a tightening
torque of 15-25 Nm.
1