Waterjet Cutter Slices Through an SLR…

[Steve WithnellParticipant @stevewithnell34426]

**LINK**

Didn't realise a waterjet would slice through a glass lens…

[Steve WithnellParticipant @stevewithnell34426]

[Michael GilliganParticipant @michaelgilligan61133]

Very impressive, Steve

Nice to see the 'keep your hands out' warning in the last couple of seconds.

MichaelG.

[bodgeParticipant @bodge]

Hi

Yes they could do that and more , this is mid seventies tec , i worked at the place where this technology was being developed in this country , American owned company .

They didnt care much about Jim Callaghan and the three day week they just shipped a load of really massive generators , enough to run all the works .

I was not in the R&D , just a shop floor grunt, they could go to pressures over 100,000 psi, making the nozzles last quite a problem for awhile

Most metal cutting was done at around 75,000 psi with a water / fine grit mix

Hi Micheal G yes….. VERY DANGEROUS………….b

Yes grit can be taken to mean any suitable medium..in solution ……..

Edited By bodge on 28/12/2016 21:10:30

Edited By bodge on 28/12/2016 21:13:43

[Mark CParticipant @markc]

The last time I had any involvement with cutting optical glass, the medium used in the water jet was garnet. It is introduced into the jet and the abrasive action does the rest.

Mark

[NJHParticipant @njh]

So it cuts through a camera ……..WHY ?

Norman

[bodgeParticipant @bodge]

Dunno , cos they are a couple of dorks i suppose and that"s what dorks do ?

I have a couple of old 35m Slr cameras i dont want , there not rare so not worth any thing , but seems a shame to destroy some thing just because you can  ………they are going free for collecting or just the price of posting if anyone wants them…………b

edit for typo……..b

Edited By bodge on 28/12/2016 21:35:24

[Jeff DaymanParticipant @jeffdayman43397]

No idea Norman.

But it does give a unique view of that type of camera.

I've used watercut cutting for optical lens sectioning/inserting since mid 1990's with a local vendor being the best I've seen. We have done many jobs on unique materials. He cuts a lot of 4" to 9" thick steel for auto body die components and also a lot of stone for local builders, countertops, mantels, signs, number plates etc.

For lenses there are a few techniques to be used for cleanest  edges and accurate results. Mounting the lenses firmly between two pieces of sacrificial 5 ply birch plywood, with thin rubber mats closely fitting the lens glass/PC on both sides, and very fine garnet in the water, give excellent results.

Here's a link to another seasonal / unique application for waterjet cutting.

I hope he turned off the garnet feed…

JD

Edited By Jeff Dayman on 28/12/2016 21:42:01

[bodgeParticipant @bodge]

To Ed D , pm replied to , sorry a bit slow on things these days…………..b

[martin perman 1Participant @martinperman1]

Gentlemen,

When I worked for ABB Robotics we had waterjet cutting systems in the Automotive factories that were used to cut the various holes in vehicle dashboards and other vehicle interior parts.

[MWParticipant @mw27036]

I hope this doesn't happen again, I've spent far too much time on youtube as it is to watch anything and everything you ever wondered being cut up with a water jet!

I think the pigs head he cuts in half is pretty good though, doesn't actually show you the footage of it going in though unfortunately, only the end result ​… Wow they have a bony head though, pretty dumb idea (they'd kill me) as it is to start a fight with a pig, but if you had to..hitting it on the head probably isn't going to do a lot.

There must be a good 3 or 4 inches of solid bone under there.

Michael W

[Nick HulmeParticipant @nickhulme30114]

It's a shame they didn't do it with clearance under the job, the result might have been cleaner if it hadn't sat in a puddle of mud for multiple passes.

I was a bit surprised to hear one of the operatives asking "is that a giant block of glass in there" when he spotted the penta-prism, the key component allowing an SLR, including digital ones, to present an optical view through the lens to the photographer.

I guess we're now in an age where "Technology of which you have insufficient knowledge looks like Magic" and increasing numbers of people see Magic everywhere they look.

– Nick

[pgk pgkParticipant @pgkpgk17461]

Posted by Michael-w on 29/12/2016 11:11:36:

I hope this doesn't happen again, I've spent far too much time on youtube as it is to watch anything and everything you ever wondered being cut up with a water jet!

I think the pigs head he cuts in half is pretty good though, doesn't actually show you the footage of it going in though unfortunately, only the end result ​… Wow they have a bony head though, pretty dumb idea (they'd kill me) as it is to start a fight with a pig, but if you had to..hitting it on the head probably isn't going to do a lot.

There must be a good 3 or 4 inches of solid bone under there.

Michael W

At risk of being 'boaring' this link will show you the radiographic densities **LINK**

The nasal cavity which shows dark is filled with scrolled turbinate bones, the frontal sinus (around the level of the eye sockets) also has some trabecular bone criss crossing so they may look more solid than they are. that's not to say that trying to win the fight by hitting it's head is going to do you any good. Indeed fighting with a pig usually just ends up with you being very muddy and the pig thinking it was fun…. unless they're having a very bad day and you get chewed

[Mike PooleParticipant @mikepoole82104]

I think we should remember that water jet cutting is not always just water at high pressure, to cut harder materials it is loaded with an abrasive, Jeff mentions garnet but other materials are used. Pure water will easily cut softer materials at those sort of pressures. If you want a painful experience run you pressure washer over your finger, I can tell you it hurts! And that is a tiny fraction of the pressure used in jet cutters. High pressure super heated steam is very dangerous as if you have a leak you cannot see or hear it. I believe plant that uses steam at these temps and pressures has ultrasonic leak detectors to warn personnel of the danger. It is amazing what objects will do if they are accelerated to a high enough speed. I saw a wax candle fired out of a shotgun which penetrated a thick sheet of plywood on the TV, my expectation was it would just splat but how wrong can you be?

Mike

[Russell EberhardtParticipant @russelleberhardt48058]

Posted by Michael Poole on 31/12/2016 12:51:44:

I saw a wax candle fired out of a shotgun which penetrated a thick sheet of plywood on the TV, my expectation was it would just splat but how wrong can you be?

Yes, I saw that demonstrated live in a public lecture at Cambridge University by an explosives expert, professor Shaw I think, back in the 1970s. Very impressive. He also gave live demonstrations of boiler explosions on a small scale. Made me very wary of such things.

Russell.

[Nick HulmeParticipant @nickhulme30114]

Posted by Michael Poole on 31/12/2016 12:51:44:

run you pressure washer over your finger, I can tell you it hurts!

Crikey Mike,

There's a good chance of a "Fluid Injection" injury if you do that with a decent pressure washer at close range.

[Speedy Builder5Participant @speedybuilder5]

I wonder if water jet cutting would cut through cornflour and water as "demonstrated on the TV" just before Xmas – Simon Reeve and the Big Fix. I expect it would. I watched a video on water cutting through 12" stainless steel the other day. nasty stuff water, it should be banned.

[Author]

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