<p dir="ltr">Hi guys,<br>
Brian, they were just careful not to take too much off (and used the grooves as a guide) - plus it wasn't that critical if it wasn't completely flat as it wasn't the sealing surface.</p>
<p dir="ltr">Hank, I reckon you'll make it work whether it wants to or not:).</p>
<p dir="ltr">Cheers,<br>
Steve</p>
<div class="gmail_quote">On 07/03/2015 10:19 AM, "hank pronk via Personal_Submersibles" <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Steve,<br>
I am half way done building my flange facing machine, I should be mostly done tomorrow. My rig already weighs about 700 lbs. I think it is important that it is heavy and mine is built heavier than the ones on YouTube. If it fails I can do as you mention. I actually did exactly what you say on Gamma's window frames. I used paint and glass with fine wet sand paper. I would guess the SS ring was much harder than the 516-70 I have.<br>
Hank<br>
--------------------------------------------<br>
On Fri, 3/6/15, Stephen Fordyce via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br>
<br>
Subject: Re: [PSUBS-MAILIST] Gamma ring machining<br>
To: "Personal Submersibles General Discussion" <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br>
Received: Friday, March 6, 2015, 4:06 PM<br>
<br>
Hi Hank,<br>
<br>
We used a flame facing machine recently at work to do a<br>
stainless steel flange on a pressure vessel about 800mm ID.<br>
We hired it to use ourselves at great expense, and the thing<br>
weighed a couple of hundred kilos, was very solid.<br>
The fitter who did the job was very experienced<br>
machinist (but hadn't used one before) but could not get<br>
the finish very smooth - I can't find photos sorry, but<br>
it was like regular machining grooves but much larger - and<br>
it looked pretty ordinary. He spent several hours with a<br>
grinder cleaning it up.<br>
On balance, it probably would have been easier<br>
to just flatten it manually with a grinder (but it was on a<br>
live liquefied natural gas plant and they don't like<br>
sparks:) ). Wasn't critical to get a flat face as we<br>
were just making room for a gasket in a slot to have more<br>
compression.<br>
After getting it pretty flat with a straight<br>
edge, the fine stuff/quality control could be done by a thin<br>
layer of paint on a known flat plate or machined flange<br>
which you put on the welded flange and then where there is<br>
no paint deposited, you know that area is too low. Obviously<br>
paint is no good, but colored oil or 2-layered carbon paper<br>
(nice because then you have a trace of it) would probably<br>
work, or charcoal.<br>
Cheers,<br>
<br>
Steve<br>
On 06/03/2015 11:40 PM,<br>
"hank pronk via Personal_Submersibles" <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br>
wrote:<br>
Brian,<br>
<br>
No, the machine is connected to the inside lip of the<br>
ring. The machine rotates on a center pivot. The cutter<br>
rotates instead of the part.<br>
<br>
Hank<br>
<br>
--------------------------------------------<br>
<br>
On Thu, 3/5/15, Brian Cox via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br>
wrote:<br>
<br>
<br>
<br>
Subject: Re: [PSUBS-MAILIST] Gamma ring machining<br>
<br>
To: "Personal Submersibles General Discussion"<br>
<<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br>
<br>
Received: Thursday, March 5, 2015, 9:15 PM<br>
<br>
<br>
<br>
Hank, are you going to be<br>
<br>
turning the whole fricking sub ?<br>
<br>
<br>
<br>
Brian<br>
<br>
<br>
<br>
--- <a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a><br>
<br>
wrote:<br>
<br>
<br>
<br>
From: hank pronk via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br>
<br>
To: <a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a><br>
<br>
Subject: [PSUBS-MAILIST] Gamma ring machining<br>
<br>
Date: Thu, 5 Mar 2015 18:00:24 -0800<br>
<br>
<br>
<br>
Today my welder came to my shop and welded the<br>
reinforcing<br>
<br>
ring into Gamma, 10 passes, looks perfect!<br>
<br>
<br>
<br>
Next step, machine the ring. I am going to make a<br>
<br>
flange facing machine from a one ton truck full<br>
<br>
floater differential hub and a part or two borrowed from<br>
my<br>
<br>
spare lathe. The rig will be hydraulic drive. <br>
<br>
This may or may not work. :-) If it works and I<br>
<br>
am confident it will, I can also face CT lands, with the<br>
CT<br>
<br>
welded in place.<br>
<br>
Hank<br>
<br>
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