>I am also interested in the ABCs of ultrasonic
>welding. It seems to be a cheap process than gluing and
>laser welding but seems very hard to get good quality
>in terms of IP protection (for example IP67: air tight).
>Note this IP is not Intellectual Property but Ingress
>Protection.
>
>Regards,
>Xiaofan

I've worked with ultrasonic welders, but it's been about 10
years, so I'm not very crisp with specifics -
IIRC, the high dollar item was the "horn", which is designed
to vibrate at it's focal point ( the weld ) at a resonant frequency.
The excitation was supplied electromagnetically.  As I recall,
the exterior of the horn had to be incredibly smooth, as any
nick would create a "hot spot", and distort the harmonics.

If you have more specific questions, I *may* be able to help.

Pretty neat concept, though.  I've also heard / seen that they
are welding steel in a similar manner.

D.
( The reformed top-poster )

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