RE: [PSUBS-MAILIST] Aqua jet cutting acrylic

[Brent Hartwig <brenthartwig@hotmail.com>]

Thiijs,
 
Actually from what I've been told by the aqua jet cutting guys I know, it's the other way around. The top of the cut has a wider kerf then the bottom, since the bottom is the last area the water with abrasives cuts, and the upper areas have been dwelled on longer by the abrasives shooting back out of the hole.

Regards,
Brent Hartwig

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Date: Thu, 23 Aug 2007 21:29:48 +0200
From: skarholm@gmail.com
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Aqua jet cutting acrylic

At what thickness does this appear ?

On 8/22/07, Thijs Struijs <thijs-struijs@planet.nl> wrote:

Hello,

 

There is a small problem with aqua jet cutting. It is difficult to explain for me as a Dutchman in English but a water jet (even with abrasive additives) tends to act as a bullet. At the entrance it cuts a small hole, at the other end there is a "big" gab. Cutting thin materials is no problem but as soon as it gets thicker the jet makes a conical hole. When you cut a round viewport you will end up with a slightly connical one. This requires machining afterwards to meet the neccessary tolerances. 

 

Regards,

Thijs Struijs         

--
Best Regards
Øystein Skarholm
www.ubat.no