Guys, Please don't take this as a load of
fuel or a fire fanning exercise either but whipping together simple roles
to role flat bar really isn't that difficult. I think I still have the
piece of junk I put together to role strip on the jack. If I can dig it
out, I'll take a pic and post it. I built it after the shop I had do my
hull rolling said they couldn't role strip on the jack. I'm sure
someone could but building simple roles was easier then hunting
for another shop farther away. Be sides it's another tool for the
arsenal.
I probably look at things a bit different then
many, but I rather spend time putting together a tool to do a job, with in
reason, rather then farm the job out. First of all, I have the tool to
use, or modify from, to do a second job if it comes by and second,
I enjoy the challenge of conquering a new skill and having it to use
again also. Sorry if I appear to do things the hard
way. I did draw the line when it came to rolling the hull though.
;-)
Dan H.
----- Original Message -----
Sent: Saturday, August 13, 2005 11:45
PM
Subject: Re: [PSUBS-MAILIST] Re:
Fabricating "T" Bars
Hay,,,no problem,,,roll the frame....that would certainty work. The
guy just wanted some way to build frames....as to building a rolling
machine. Besides,,,its a k 350 and we are talking about 150 PSI
not 2 or 3 thousand feet. Daniel Lance <lanceind@earthlink.net>
wrote:
At
the risk of starting a flame war, I'm going to pipe in one more
time. Yes, a "T" bar can be fabricated using curved segments. The
question is why would you want to ? I can't think of a more labor
intensive method. The warpage and distortion from the welding will be
challenging to say the least ! Plywood for a welding jig ? Wow . When you
are done welding the flange to the web the whole "T" bar assembly has to
put on a lathe or a rotary table of a milling machine and be trued up
round. You want to keep as much of the 1 1/2 " web as possible, i.e. the
whole reason you are fabricating "T" bars in the first
place. Cliff, If I were you I would pony up the nickels and just pay
someone to shear and roll some flat bars for me. If you are really
ambitious and think you will use it again then consider buiding a basic
bar roller. But it has to besaid, using a basic pyramid style roller
(not CNC controlled) requires skill and PRACTICE! Practice usually means
generating scrap which rachets up overall cost of the project. A K-350
pressure hull is about as basic as you are going to get .
George Kittredge put a lot of effort into designing his subs. There are
not any shortcuts to be had. Using the right alloy of steel(SA 516 GR 70)
and building to the specications of the drawings is really important.
Your life depends on it ! My humble opinion, Dan Lance
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