[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[PSUBS-MAILIST] Metal Fabrication



Sirs,

For the UC3 I make use of a mix of ox acetylene cutting done by hand by my self - and a company cutting with the same technique but in a CNC machine. With practice cutting steal by hand can be very precise - not CNC but nice - and very cheap. Most parts like the bulkheads and frames was hand cut for UC3 - and it was the least of my problems. I often mark up the plates using models cut from cardboard or drawings made by chalk directly on the raw steal plates.

For hull welding I use a type of MIG welding with cord this is filled with a protective material - and with Ar - CO2 mix gas protection. This method I exceptionally productive and an important reason that the project can be made. I often have to make very big welds - fusing 15 mm and 20 mm steal - and I don't have all that much time.

With these two tools - the big welder and the hand held ox acetylene cutting burner - I guess anyone can make his own IOWA class battleship - it just a matter of determination.

I must stress - that in my humble opnion - learning the basics of steal constrution is a must for a person who wish to make a submarine. To bye that service - is simply too expensive for anyone but millionaires. Its not just a pressurehull - it is hundereds of small thing that needs this
kind of qualifications.

Best Regards,

Peter Madsen




----- Original Message ----- From: "Joseph Perkel" <joeperkel@hotmail.com>
To: <personal_submersibles@psubs.org>
Sent: Sunday, June 17, 2007 2:03 PM
Subject: Re: [PSUBS-MAILIST] Metal Fabrication



Frank,

Thanks.....I believe this is worth it, particularly the smooth / non-stressed cuts. If I read you correctly, that $5,200 was total for the material, cold forming, and cuts to date for your main pieces....not too bad!

Tell me please, what does all that weigh approximately at this point? From that, I will do a rough....very rough extrapolation of what I might expect to get to that point.....better than blind guessing.

Joe

From: ShellyDalg@aol.com
Reply-To: personal_submersibles@psubs.org
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Metal Fabrication
Date: Sat, 16 Jun 2007 19:37:16 EDT

Regarding "big machining".......yes, it was expensive. To cut the bands for
the hatch and three windows with the water jet was $610, but only $200 to
roll them into circles. I had already purchased the steel sheet.
I could have cut the bands myself with the torch for next to no cost ( just oxy and acetylene ) or had them sheared, but I couldn't find a shear to cut 3/8 steel of this type. Although the AS 516-70 steel isn't that hard, no one wanted to risk breaking their shear. The shop also cut the circle flanges for these parts. One inch thick and 2 inches wide, 2 at 24 inch O.D. and 2 at 16 inch O.D. plus the hatch ring at 1-1/2 inch thick by 2 inch wide and the dome
lid  ring at 1 inch by 2 inch.
The water jet went through that steel like butter, no heat applied, and the
cut is amazingly smooth.
Total for material and labor for the three window tubes, one band at 84 inch
diameter, hatch tube, and five thick rings was $2800.
Still, with all the steel here now, my total cost for the pressure hull
pieces is $5200.
That is right where I had budgeted, and the quality is great.
If I had cut all this steel with my torch, I'd still be grinding the edges
for several days and the steel edges would have had a lot of heat stress added
to them.
Bottom line......Pricey but worth every cent.Frank  D.



************************************** See what's free at http://www.aol.com.





************************************************************************
************************************************************************
************************************************************************
The personal submersibles mailing list complies with the US Federal
CAN-SPAM Act of 2003.  Your email address appears in our database
because either you, or someone you know, requested you receive messages
from our organization.

If you want to be removed from this mailing list simply click on the
link below or send a blank email message to:
removeme-personal_submersibles@psubs.org

Removal of your email address from this mailing list occurs by an
automated process and should be complete within five minutes of
our server receiving your request.

PSUBS.ORG
PO Box 53
Weare, NH  03281
603-529-1100
************************************************************************
************************************************************************
************************************************************************



--
Jeg beskyttes af den gratis SPAMfighter til privatbrugere.
Den har indtil videre sparet mig for at få 16331 spam-mails.
Betalende brugere får ikke denne besked i deres e-mails.
Hent gratis SPAMfighter her: http://www.spamfighter.com/lda





************************************************************************
************************************************************************
************************************************************************
The personal submersibles mailing list complies with the US Federal
CAN-SPAM Act of 2003.  Your email address appears in our database
because either you, or someone you know, requested you receive messages
from our organization.

If you want to be removed from this mailing list simply click on the
link below or send a blank email message to:
	removeme-personal_submersibles@psubs.org

Removal of your email address from this mailing list occurs by an
automated process and should be complete within five minutes of
our server receiving your request.

PSUBS.ORG
PO Box 53
Weare, NH  03281
603-529-1100
************************************************************************
************************************************************************
************************************************************************