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Correction, I looked at my notes and it took about 30 minutes to cut the 2" thick viewport to a 15" OD. Szybowski From: brenthartwig@hotmail.com To: personal_submersibles@psubs.org Subject: RE: [PSUBS-MAILIST] Aqua Jet Cutting My 2" Acrylic Viewport Date: Sun, 19 Jul 2009 23:01:36 -0700 Thanks Jon, Ya I don't know about the exact stress issues either, so I'll be annealling any windows cut this way until more favorable data is available for are specific applications. Most the basic flat viewports I've seen have a little bit of a gap between the OD of the acrylic and the side walls of the welded in seat, so I don't see the tiny bevel as being a real issue. We just need to make sure there is a little gap or one might whind up having to lathe turn the part to make it fit. The machine we used is just a basic 2 axis CNC machine, so it can't change the angle of the head as it cuts. Other machines might be set up for that. I also need to find out what type tip and garnet feed rate we used, and add it to my data. It took about 40 minutes to cut the 2" thick viewport to a 15" OD. Regards, Szybowski > Date: Sun, 19 Jul 2009 23:10:00 -0400 > From: jonw@psubs.org > To: personal_submersibles@psubs.org > Subject: Re: [PSUBS-MAILIST] Aqua Jet Cutting My 2" Acrylic Viewport > > > Nice. I'm not sure about stresses set up by water jetting, but I'd > guess they are no worse than what a lathe would impart on the same > material. The only issue I see is the taper which could affect > performance since the port would not sit true against the window seat. > But I'm assuming a 90 degree cut can be achieved if the water jet is set > up to cut that way. > > Jon > > > Brent Hartwig wrote: > > > > > > ** > > <http://cid-5085d10eb6afe47c.skydrive.live.com/browse.aspx/Water%20Jet%20Cutting%20Thick%20Acrylic>*The > > cut turned out really nice, and was ever smoother wave wise then the > > inch think acrylic viewport I have that was cut with a CNC Laser for a > > hyperbaric chamber. ( Note I don't know what the lasers cut rate was, > > or how powerful of one it was) The laser cut surface is glossy, and > > the aqua jet cut surface looks like it's been media blasted with > > baking soda. The surface created by the aqua jet cutting is much > > better for bonding the Seka Primer to. * > > ** > > ** > > > > > ************************************************************************ > ************************************************************************ > ************************************************************************ > The personal submersibles mailing list complies with the US Federal > CAN-SPAM Act of 2003. Your email address appears in our database > because either you, or someone you know, requested you receive messages > from our organization. > > If you want to be removed from this mailing list simply click on the > link below or send a blank email message to: > removeme-personal_submersibles@psubs.org > > Removal of your email address from this mailing list occurs by an > automated process and should be complete within five minutes of > our server receiving your request. > > PSUBS.ORG > PO Box 53 > Weare, NH 03281 > 603-529-1100 > ************************************************************************ > ************************************************************************ > ************************************************************************ > |