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Hi Brent, You have come up with some innovative ideas and it is great to
explore them. How are you making the flanges? From your drawings
they look as though they are machined flat with some nice chamfers etc.
The new cutting Rings you have made look as though they are machined or how
would you make them. It appears you are making a machined “non
machined” hatch design. Where are you going with
this? I think you deserve a prize for entertainment!! Looking
forward to meeting you at P-subs. Cheers, Hugh From:
owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of Brent
Hartwig
From:
cody_mcmillan@hotmail.com From: brenthartwig@hotmail.com This
is an idea I've been wanting to make some CAD models and drawings of for some
time now. We have this big oval or rectangle steel plate doors for the
hyperbaric chambers, and it's expensive to machine the doors and seating
flanges flat, plus cut the O-ring groove. Even then the welded in door frame
can and usually warps some. Once welded in the door frame is very hard to
machine. The concept shown in the below pictures and drawings, is
showing a K-350 type hatch and hatch land, that have two rolled 1/4" SS
rod rings, that are TIG welded onto the hatch flange, and two on the hatch
land. The two on the hatch land are to form a dam for Sekaflex, that you
caulk in there and level off. Then to allow the upper SS rings to seat
down into the Sekaflex enough to take up any warp in both flanges and not stick
to the Sekaflex while it is curing, you apply mold release to the SS rings, and
then spray them with PVA mold release agent and let that dry. Then before
the Sekaflex is caulked into the lower rings, you lower the hatch and figure
out what spacers you need to keep if from going down to far into the urethane.
Then add the Sekaflex of the type of hardness you want, and lower the hatch,
which is attached at the hinge to keep every thing lined up, and set the hatch
down on your taped or clamped on spacers, and let it cure. One
could use just one upper SS sealing ring as you can see in the drawing of a
large WWII ballast tank flapper valve. But I like the primary and
secondary sealing means, and it evens out the stresses more. " Stand still. The trees ahead and bush beside you are
not lost." ~ Albert Einstein Regards Click
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