[PSUBS-MAILIST] Gamma ring machining
hank pronk via Personal_Submersibles
personal_submersibles at psubs.org
Sat Mar 7 20:09:19 EST 2015
Hugh,
Yes it is like that but very heavily built with a sliding tool post bolted on to hold a cutter. I have a hydraulic motor and worm gear driving it. I think your right,,, grinding will work much easier. The ring is pretty darn hard after welding. I am breaking cutters :-( Time to regroup and rig up a grinder attachment ;-)
No pictures yet, it is kinda ugly
Hank
--------------------------------------------
On Sat, 3/7/15, Hugh Fulton 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: Saturday, March 7, 2015, 7:30 PM
Hi
Hank,Sounds great and I think it needs a grinding
disc.Is it
on your projects page?
Anything like this?Hugh -----Original
Message-----
From: Personal_Submersibles
[mailto:personal_submersibles-bounces at psubs.org] On Behalf
Of hank pronk via Personal_Submersibles
Sent: Sunday, 8 March 2015 1:08 p.m.
To: Personal Submersibles General Discussion
Subject: Re: [PSUBS-MAILIST] Gamma ring machining
Hugh,I just
built one, started testing it but needs to be more ridged
unless I mount a grinder on it instead of a
cutter.Hank--------------------------------------------On Sat,
3/7/15, Hugh Fulton 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: Saturday, March 7, 2015, 6:45 PM
Try googling Portable Flange
facer. You can probably find a local place to
rent from.Alternatively you can make one using a
heavy trailer axle hub mounted to a plate with two
jacking nuts for each of 5 holding points then an arm with
a pneumatic (air) grinder and a cup wheel.Maybe we
need to do an open source design for p-subs for an
easy to build one as this has come up before.Hugh
From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org]
On Behalf Of Alec Smyth via
Personal_Submersibles Sent:
Sunday, 8 March 2015 11:32 a.m. To:
Personal Submersibles General Discussion
Subject: Re: [PSUBS-MAILIST] Gamma ring
machining
I used to do
lapping many, many years ago when I built some plastic
injection molds. We lapped on a glass plate because
it's smoother than plate steel. You change the
glass every so often because as abrades it loses its
flatness. There's no trouble knowing if the piece
you're lapping is done or if its flat. What
happens is that, as you work it, you can see the
difference in the surface finish. The new finish
gradually spreads across the surface, and when its uniform
you know you've got rid of any low points. I
really can't imagine lapping something as big as
we're talking about here, although I suppose its
technically possible. This was really hard work,
taking days on end to do a piece that was maybe
6" by 10", tiny compared to what we're
talking about here. Greg Cottrell told me
he finished his hatch land surface with an angle
grinder, using a flap wheel and a lot of patience. It
looks like it had been machined.
Best, Alec On Sat, Mar 7, 2015 at 2:09
PM, Alan James via Personal_Submersibles <personal_submersibles at psubs.org>
wrote:Hank,had a quick search but couldn't find
any suitable lappingsolution for a home
builder. There
were referances to thickplate glass with a bonded
diamond surface & marble aslapping
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
_______________________________________________
Personal_Submersibles
mailing list
Personal_Submersibles at psubs.org
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
_______________________________________________
Personal_Submersibles
mailing list
Personal_Submersibles at psubs.org
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
_______________________________________________
Personal_Submersibles
mailing list
Personal_Submersibles at psubs.org
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
-----Inline Attachment
Follows-----
_______________________________________________
Personal_Submersibles mailing list
Personal_Submersibles at psubs.org
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
_______________________________________________
Personal_Submersibles mailing list
Personal_Submersibles at psubs.org
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
-----Inline Attachment
Follows-----
_______________________________________________
Personal_Submersibles mailing list
Personal_Submersibles at psubs.org
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
_______________________________________________
Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
-----Inline Attachment
Follows-----
_______________________________________________
Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
_______________________________________________
Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
_______________________________________________
Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
__________ Information from ESET NOD32
Antivirus, version of virus signature database 11285
(20150307) __________ The message was checked by
ESET NOD32 Antivirus. http://www.eset.com
__________ Information from ESET NOD32
Antivirus, version of virus signature database 11285
(20150307) __________
The message was checked by ESET NOD32
Antivirus.
http://www.eset.com
-----Inline Attachment
Follows-----
_______________________________________________
Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
_______________________________________________Personal_Submersibles mailing listPersonal_Submersibles at psubs.orghttp://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
__________ Information from ESET NOD32
Antivirus, version of virus signature database 11285
(20150307) __________
The message was checked by ESET NOD32
Antivirus.
http://www.eset.com
__________ Information from ESET NOD32 Antivirus, version of
virus signature database 11285 (20150307) __________
The message was checked by ESET NOD32 Antivirus.
http://www.eset.com
-----Inline Attachment Follows-----
_______________________________________________
Personal_Submersibles mailing list
Personal_Submersibles at psubs.org
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
More information about the Personal_Submersibles
mailing list