[meteorite-list] Water fun

From: Meteoriteshow <meteoriteshow_at_meteoritecentral.com>
Date: Tue Mar 21 22:17:17 2006
Message-ID: <00ad01c64cc9$16bcd790$0400a8c0_at_IBM>

Hi Marcin, Pete and All,

Yes Marcin, many thanks for sharing those information.
As I already wrote in my previous e-mail about this topic, I have tried it about three years ago and didn't mention it to the List
at that time as I did not go any further in this direction... Water jet cutting is VERY WELL ADAPTED to HOMOGENEOUS & THIN
MATERIALS -the harder they are, the best it is. As soon as you want to cut SLICES and/or a HETEROGENEOUS material, then it is
getting much more difficult with water jet.
1- the water jet will remove more material when getting through softer material and less when material gets harder. The cutting
surface will then not be flat, causing high losses when polishing
2- the water jet is conical, very narrow at the beginning and then getting wider. It is therefore very adapted to cutting parts from
thin plates -such as gears for instance- with a very high accuracy. But when cutting a thick material such as a meteorite stone, you
cannot obtain slices with parallel surfaces.

In addition to this, I didn't see any debris container to collect what is taken off. And even if there was such a device, the
company where I tried water jet cutting was using a mixture of water and sand to cut. They could adjust the amount of sand to be
mixed with water and could also cut without any sand. But in this case, cutting was less accurate and much slower. So if cutting
with water and sand, the debris that could be collected would be a mixture of sand and meteorite.

Cheers,

Frederic Beroud
http://www.meteoriteshow.com
IMCA member # 2491 (http://www.imca.cc/)

----- Original Message -----
From: "Pete Pete" <rsvp321_at_hotmail.com>
To: <marcin_at_polandmet.com>; <meteorite-list@meteoritecentral.com>
Sent: Monday, March 20, 2006 6:09 PM
Subject: RE: [meteorite-list] Water fun


> Hi, Marcin,
>
> This is interesting! Thanks!
>
> What would the kerf be? In Pic 2 it looks fairly wide...
>
> Also, is there a debris container underneath to collect what is taken off,
> or does the material become completely pulverized?
>
> Cheers,
> Pete
>
>
> From: <marcin_at_polandmet.com>
> To: <meteorite-list_at_meteoritecentral.com>
> Subject: [meteorite-list] Water fun
> Date: Mon, 20 Mar 2006 16:25:09 +0100
>
> Grrr my 4th try......
>
> Hi
> As a person who like test new tortue techniques on meteorites I was very
> happy when one private industrial factory purchased first in whole region
> equipment to cut using high presure water.
> Machinery was 1 month old and when I told them what I want try to cut 3/4 of
> live personel come and watch cutting process. I take my 3kg SAU001 half
> specimen to try cut it.
> Cutting surface was 10cm long and 9cm high.
>
> Ofcourse this is not the best way to cut stones, but I was very curious how
> will look cut surface. I tell them to change cutting speed 3 times. They
> start cut with 20mm/min and this was too fast, hen 5 and 10mm per minute.
>
> Here is results
> http://www.meteoryt.net/ebay/prefel1.jpg
> http://www.meteoryt.net/ebay/prefel2.jpg
> http://www.meteoryt.net/ebay/prefel3.jpg
>
> Now Im looking only for laser and plasma cutting equipment to produce some
> ataxites from my morasko :)
>
> PS, anyone interested in water cutted slice of Sau001 307g ? :D
>
> -----[ MARCIN CIMALA ]-----[ I.M.C.A.#3667 ]-----
> http://www.Meteoryt.net marcin_at_meteoryt.net
> http://www.PolandMET.com marcin_at_polandmet.com
> http://www.Gao-Guenie.com GSM +48(607)535 195
> --------[ Member of Polish Meteoritical Society ]--------
>
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Received on Tue 21 Mar 2006 04:23:14 AM PST