Questions

Hi.

I am very new to ultrasonics and would like to learn from you all. Thanks in advance. :)

I have an square sonotrode that was crack at the center. Is it possible to get it repaired?

If I want to make a new square sonotrode, can I just copy the shape? How about the materials. I am not sure if I can get the same material in my area! If I need to do tuning, what equipment do I need? Can I use the US generator to do the testing, any possible problem to it. I am scare of damaging the US gen coz it is very expensive (Branson 2000ea, 30Khz, 1500W).

Where can I get used US gen at 30kHz?

Has anybody had recent business dealing with a Russian manufacturer of magnetostrictive transducers, Aphalina Ltd?

http://mitglied.lycos.de/aphalina/

For the last few weeks, I have been trying to contact them but their e-mail address is not in use and their telephone number is the 'wrong number'.

Are they still in business?

Hello for all !

There is one theoretical and, could be, practical problem:

If the (30 Khz/50 W) magnetostrictive ultrasonic acuator oscillate 5 microns, and we want to increase amlitude to 1000 microns with steel sonotrode amplifier, what is the best way to do it ?
Suppose the diameter stepped snotrode amplifier have diameter ratio 2:1 (max. 4x amplification). Then, we could make 4 steps section with 4 steps of the sonotrode. If the calculation : 4x5 microns=20, 4x20=80, 4x80=320, 4x320=1280 microns ! Is it possible in practice ? Is there too much stress and loss ?

Hello Chris and thanks for providing a place for fellow Ultrasonics enthusiasts to share information.

I am relatively new to Ultrasonics, although I have over 30 years of professional experience in audio production and audio acoustics. I have worked with what I thought was some seriously amplified systems, but they really don't compare to the power demands of transducers.

So I have two questions:

As your discuss about horn making, I have a question.

I wanted my generator supplier to give me variable power. He modified the standard 1500W generator to give 4 outputs like, 200 to 400W, 600W to 800W, 800 to 1200W and 1200 to 1400W.

Here I am using 12 x 50W transducers = 600W, when I measure the voltage across a transducer it varies from 650V to 950V with varying frequency from 16 to 23kHz.

In this situation if I replace 12 pc x 50W transducers to single 600W tranducer and get a booster, how to make a horn for this varying frequency?

Thanks

Sir, I've some doubts regarding ultrasonics and their application to machining. Kindly clarify them.
1. I saw some ultrasonic machine tools specifying the range of frequency in which they operate. say--- 17 to 21 khz. In such case how can the transducer be tuned to operate at resonant condition over
entire range? Also as you answered to some query, is removing material here and there is the only method of tuning??

Hi,
Our company is dealing with ultrasonic welding equipment. I would like to know if you can recommend proved software for sonotrode design. I heard about a French program "ATILA", which cost a fortune, and I don't know if it was proved in the field!
I will appreciate your opinion and suggestions.

Best Regards

Ronald

I recently reworked one of my ultrasonic horns and I now need to tune its frequency. The horn is a 20 kHz solid steel horn that has a round diameter in the rear and narrows to a flat "blade" in the front. I do have access to a Dukane horn analyzer.

Can you tell me where I need to machine the horn to increase and also decrease the frequency?

Thank you.