[PSUBS-MAILIST] Gamma ring machining

Sat Mar 7 18:24:22 EST 2015

Hi Brian,

I have a Ham guy working with me.

Contact me off line.  hc.fulton at gmail.com

Hugh

From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of Brian Cox via Personal_Submersibles
Sent: Sunday, 8 March 2015 10:10 a.m.
To: Personal Submersibles General Discussion
Subject: Re: [PSUBS-MAILIST] Gamma ring machining

Hey Alan,

                    Do you know any Ham radio guys down there ?

Brian,

KK6IRC

73

--- personal_submersibles at psubs.org wrote:

From: Alan James via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] Gamma ring machining
Date: Sat, 7 Mar 2015 19:09:51 +0000 (UTC)

Hank,

had a quick search but couldn't find any suitable lapping

solution for a home builder. There were referances to thick

plate glass with a bonded diamond surface & marble as

lapping plates.

Alan

  _____  

From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
Sent: Saturday, March 7, 2015 11:29 PM
Subject: Re: [PSUBS-MAILIST] Gamma ring machining

Alan,
I have been told that it would work, but I am not convinced.  I would think the machined disk needs to be harder so it does not wear down.  Honestly I just don't know.  
Hank--------------------------------------------
On Fri, 3/6/15, Alan James via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

Subject: Re: [PSUBS-MAILIST] Gamma ring machining
To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
Received: Friday, March 6, 2015, 9:30 PM

So
do you think it would work with a flatsheet
rotating on your reinforcing ring?I
had thought of doing this with the hatch & landing,
toget a
perfect seal, not sure if I would need an orbital
motionor
not.Alan

    From: hank pronk via
Personal_Submersibles
<personal_submersibles at psubs.org>

To: Personal
Submersibles General Discussion
<personal_submersibles at psubs.org> 

Sent:
Saturday, March 7, 2015 12:52 PM
  Subject: Re:
[PSUBS-MAILIST] Gamma ring machining

Alan,
Yes I
have done lapping in the past.  I mostly lap valves in
engines.  It works great on two tapered faces.  
Hank--------------------------------------------
On Fri, 3/6/15, Alan James via
Personal_Submersibles <personal_submersibles at psubs.org>
wrote:

  Subject: Re:
[PSUBS-MAILIST] Gamma ring machining
  To:
"Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
  Received: Friday, March 6, 2015, 6:39 PM

  Hank,are you
  familiar with lapping?Rubbing

two surfaces together with abrasive paste in
  betweenhttp://en.wikipedia.org/wiki/Lapping
  Haven't
  done it but have
seen it in operation; you can get a very

smoothsurface
  with this technique. Not sure
if you could adapt it to your
  newflange
  facing machine.The
  machine I
saw in operation was slow but required very little
  attention.Alan

    From: hank pronk
via
  Personal_Submersibles

<personal_submersibles at psubs.org>

  To: Personal
  Submersibles General Discussion
  <personal_submersibles at psubs.org>

  Sent:

Saturday, March 7, 2015 12:18 PM
  Subject:
Re:
  [PSUBS-MAILIST] Gamma ring machining

Steve,
  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.
  Hank

--------------------------------------------
  On Fri, 3/6/15, Stephen Fordyce via
  Personal_Submersibles <personal_submersibles at psubs.org>
  wrote:

Subject: Re:
  [PSUBS-MAILIST] Gamma ring
machining
  To:

"Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
  Received: Friday, March 6, 2015, 4:06 PM

  Hi Hank,

  We used
a flame facing machine recently at
  work to
do a
  stainless steel flange on a
  pressure vessel about 800mm ID.
  We hired it
  to use
ourselves at great expense, and the thing

weighed a couple of hundred kilos, was very

solid.
  The fitter who did the job was
very
  experienced

machinist (but hadn't used
  one before)
but could not get
  the finish
  very smooth - I can't find photos sorry,
but
  it was like regular machining grooves
but much
  larger - and
  it
looked pretty ordinary. He
  spent several
hours with a
  grinder cleaning
  it up.
  On balance, it
probably would have
  been easier
  to just flatten it manually

with a grinder (but it was on a
  live
  liquefied natural gas plant and they don't
like
  sparks:) ). Wasn't critical to
get a flat
  face as we

were just making room for a
  gasket in a
slot to have more

compression.
  After getting it pretty
flat
  with a straight

edge, the fine
  stuff/quality control could
be done by a thin
  layer of paint on a
known flat plate or
  machined flange
  which you put on the welded

flange and then where there is
  no
paint
  deposited, you know that area is too
low. Obviously
  paint is no good, but
colored oil or 2-layered
  carbon paper
  (nice because then you have a
  trace of it) would probably

work, or
  charcoal.

Cheers,

  Steve
  On 06/03/2015 11:40
  PM,
  "hank pronk via

Personal_Submersibles" <personal_submersibles at psubs.org>
  wrote:
  Brian,

  No, the machine is
connected
  to the inside lip of the
  ring.  The
  machine rotates
on a center pivot.  The cutter
  rotates
instead of the part.

  Hank

--------------------------------------------

  On Thu, 3/5/15, Brian
Cox
  via Personal_Submersibles <personal_submersibles at psubs.org>
  wrote:

 Subject: Re:
  [PSUBS-MAILIST] Gamma ring
machining

   To:
"Personal Submersibles General

Discussion"
  <personal_submersibles at psubs.org>

   Received: Thursday,
March
  5, 2015, 9:15 PM

 Hank,  are you going to
  be

   turning the whole
  fricking sub ?

 Brian

   --- personal_submersibles at psubs.org

   wrote:

   From:
hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>

   To: personal_submersibles at psubs.org

   Subject:
[PSUBS-MAILIST]
  Gamma ring machining

   Date:
Thu, 5 Mar 2015 18:00:24 -0800

 Today my
  welder came to my shop and
welded the

  reinforcing

   ring into
  Gamma, 10 passes, looks perfect!

   Next
  step, machine the
ring.  I am going to make a

   flange facing machine from
  a one ton  truck full

   floater differential hub
and a part or two borrowed
  from
  my

   spare lathe.  The rig will be hydraulic
drive. 

   This may
or may not
  work.  :-)  If it works and
I

   am confident it
will, I can also face CT
  lands, with the
  CT

 welded in place.

 Hank

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