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Glen,
Hugh's way is what I would use. I've done
similar jobs in the past.
One twist to his description I'd consider is,
instead of a "lazy Susan" type setup, you may find it easier to make a spider
top mount with a flange block bearing in its center to go in the coning tower
and a second flange block to tack weld at the bottom of your hull inside the sub
a few inches off the deck. Then use a shaft of the appropriate size
and length to go between them with a swing arm to hold your grinder on it's
top. It will be easy to mount your rig in the center of the conning tower
than locate your bottom bearing so your grinder swings parallel to your flange
face. For simple height adjustment you can wedge under the shaft or use a
nut and bolt mounted under your bottom pillow block as a simple screw jack to
set your grinding depth.
Dan H.
----- Original Message -----
Sent: Thursday, March 10, 2011 3:32
PM
Subject: Re: [PSUBS-MAILIST] CT ring
surface not true.
Hugh,sounds good seeing I have 3 bench
grinders and quite keen to fix the ring myself ,the ring is allso
4mm thicker than called for by the plans for this very reason.I wonder if
the opposite bottom of the ring could allso be used as a guide possibly
with rollers.Love to see your sketch.By the way after welding the ring on to
the ct I faced it in a large lathe mating it with the hatch cover
ring.
Glen
----- Original Message -----
Sent: Thursday, March 10, 2011 9:49
PM
Subject: RE: [PSUBS-MAILIST] CT ring
surface not true.
Glen,
there are many portable flange surfacing machines around that do onsite work
and wont cost much. Other than that you will have to find someone with
a large horizontal borer and take it to their shop.
IF
you want to do it yourself use a bench grinder with cup wheel mounted on an
angle plate which is mounted between nuts on studs on a round plate and get
a good quality ?Lazy suzy? bearing between two steel discs. Bottom
disc should have nuts welded in 4 places 90 degrees so you can screw jacking
bolts against the inside of the ring or conning tower depending on
dimensions. IF you like the idea then we can do a sketch.
Grinder will only do about 0.1mm per rev. Depends on where you are,
resources etc. Always remember there are always minimum of 3 ways you
should consider to solve any problem. Hugh
From:
owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of Glen
Brown
Sent: Friday, 11 March 2011 3:49 a.m.
To:
personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] CT
ring surface not true.
I need Idea's to
get my ct ring surface to mate with my hatch ring as it has warped by +
- 2mm in the welding
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