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> Paging Mueller, Bowlsby, Bleyseng and Jaroen
r_towle
post Jan 11 2006, 08:07 PM
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Hi guys,

Through a local DOD contractor I found a few small shops that will make Berillium Diaphrams...

Apparently the new fighter jets use alot of the material, so they are set up to work with it, and do small runs...

So , what I need, to get a price, is CAD drawings of the diaphram, and the piece that gets pressed into the middle..

I have been told that they can do it, based upon my description.

So, did anyone ever make a drawing of the diaphram...or maybe please......mike...could you...

Rich
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JeffBowlsby
post Jan 11 2006, 09:41 PM
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Cool....!

Mike, you are the man to do a drawing. I could do a hand-drafted drawing if needed.

I hope this works out, it would save a lot of D-Jet systems.
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Demick
post Jan 11 2006, 09:51 PM
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Jeff

If you have a diaphragm lying around that you can get over to me, I'll make a 3D CAD model and some detailed engineering drawings of it.

Demick
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jimkelly
post Jan 11 2006, 10:07 PM
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do they really need a cad drawing or can they work with an actual part?

did they quote you a ballaprk price range?

if you can't get anyone to do a cad - I can send you a bad mps.

Jim
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r_towle
post Jan 11 2006, 10:09 PM
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cad.
if they need to measure, and make the drawing...that takes time.

rich
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rick 918-S
post Jan 11 2006, 11:13 PM
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Dude! (IMG:http://www.914world.com/bbs2/html/emoticons/clap.gif)
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Bleyseng
post Jan 11 2006, 11:37 PM
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I have a spare decent diaphram laying around if you need one. Ray Greenwood is working on making some but I am not sure about the center pieces fitting.
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Demick
post Jan 12 2006, 09:44 AM
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Jeff is going to send me a diaphragm. After I get it in CAD, I'll make the files and drawings available.

Demick
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Bleyseng
post Jan 12 2006, 09:56 AM
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Is it Berillium? The ones I have are copper or atleast mostly copper. Now the aneroid cells are something different.....



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ppickerell
post Jan 12 2006, 10:01 AM
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I can make the beryllium piece in my shop, but there will be form tooling required to make the concentric rings.
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r_towle
post Jan 12 2006, 10:27 AM
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I was just going on what you guy have been saying for years...

I read lots of threads here...I was told the original diaphram (the one that breaks) was made from berillium.

The replacements that were being used were made of a copper bronze alloy that did not work the same way and were harder to tune.

So, I ran into this guy, and I am willing to take this through to a price etc...

And yes, they would make a press tool for the ridges, and they would make new center pieces, and assemble the whole deal...at least that was the concept.

At least we can have a healthy discussion and possibly they may have some setup ideas...

I would prefer we make these entirely new, no need to hunt down cores just for the middle part,,,then have to disassemble them...

Rich
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Jeroen
post Jan 12 2006, 10:37 AM
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funny, I've been looking into the same thing
was doing some investigating on the issue, but because of being too busy, I got a little side-tracked
lets see what you can come up with...
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Jenny
post Jan 12 2006, 10:57 AM
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(IMG:http://www.914world.com/bbs2/html/emoticons/lol2.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/lol2.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/lol2.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/lol2.gif)

I thought you guys were talking about these things!
(IMG:http://i.imdb.com/mptv1.gif)

Jen
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Jenny
post Jan 12 2006, 11:00 AM
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bugger... the picture didn't take.


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airsix
post Jan 12 2006, 12:11 PM
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QUOTE (r_towle @ Jan 12 2006, 08:27 AM)
I was just going on what you guy have been saying for years...

I read lots of threads here...I was told the original diaphram (the one that breaks) was made from berillium.

The replacements that were being used were made of a copper bronze alloy that did not work the same way and were harder to tune.

Copper and Copper-bronze will work harden. Beryllium won't. It's also over 30% more elastic than steel..... however it's NASTY stuff. If any of you DO decide to work with it be aware that absorbsion of airborne particles is a VERY serious health risk. :deadsmiley:

IMHO it's more likely that the diaphrams were made from Beryllium copper rather than pure Beryllium. Beryllium copper is 98% copper 2% beryllium.

B.C. is highly ductile which makes it great for forming complex stamped parts (see picture above) It's also the only copper alloy I know of that can be heat-treated. It is used for springs and such in specialized applications (it's light, doesn't work harden easily, and is a good electrical conductor).

-Ben M.
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Demick
post Jan 12 2006, 01:22 PM
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Yep. I would guess that the appropriate callout for this would be half-hard BeCu.

Demick
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r_towle
post Jan 12 2006, 01:41 PM
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ok, you sound smart...

can you arrange to have someone test the original diaphram to determine what it is?

At least if we start with the correct alloy we will be better off...

Rich
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Demick
post Jan 12 2006, 06:31 PM
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Im not sure how to have it tested, but BeCu is the natural choice for this application. Not many materials suited to this. Only question in my mind is the degree of hardening.

Demick
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TimT
post Jan 12 2006, 06:41 PM
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You will have to sacrifice one and send it to a Materials Testing Lab and have an assay done.

Since we know kind of what it is made of makes it much easier for the lab, and sort of less costly for us.
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Bleyseng
post Jan 12 2006, 07:02 PM
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I can send someone dead OEM ones.....got a few of those sitting around in a box along with 50 dead mps's.
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