Water jet cutting
Existential Angst
http://en.wikipedia.org/wiki/Water_jet_cutter is a neat article on water
jets, showing 5 axis cutting.
But they comment that water jet cutting can be done with water alone,
*without abrasive*, achieving much finer cuts. Abrasive cuts vary from .020
to .050, while non-abrasive cuts vary from .003 (!!) to .013.
When is non-abrasive cutting used? Often?
I would imagine it would be for thin and/or soft material.
What's the thickest material that can be cut with abrasives+water?
I was astonished to read that steel 24" thick can be cut with
oxyacetylene -- holy shit....
--
EA
Gunner Asch
<UNfi...@UNoptonline.net> wrote:
>Awl --
>
>http://en.wikipedia.org/wiki/Water_jet_cutter is a neat article on water
>jets, showing 5 axis cutting.
>
>But they comment that water jet cutting can be done with water alone,
>*without abrasive*, achieving much finer cuts. Abrasive cuts vary from .020
>to .050, while non-abrasive cuts vary from .003 (!!) to .013.
>
>When is non-abrasive cutting used? Often?
>I would imagine it would be for thin and/or soft material.
Water is usually used for non ferrous metals, sheet metals, many types
of hard plastics and what have you, under 1/4" thick. Adding the
abrasive REALLY increases the cutting power. And surprisingly..not all
that much abrasive is actually added.
>
>What's the thickest material that can be cut with abrasives+water?f
Ive seen 4" thick aluminum on a BIG water jet table. No idea what the
max is.
>
>I was astonished to read that steel 24" thick can be cut with
>oxyacetylene -- holy shit....
And the kerf is surprisingly small. Though it takes a very special
torch and proper machinery to do it.
Royston Vasey
"Existential Angst" <UNfi...@UNoptonline.net> wrote in message
news:4b5ac0a9$0$4993$607e...@cv.net...
I saw some video years ago of the fabric for hood linings of cars being cut
to size using water jets.
Existential Angst
news:3fill5l9un7figk3e...@4ax.com...
> On Sat, 23 Jan 2010 04:25:55 -0500, "Existential Angst"
> <UNfi...@UNoptonline.net> wrote:
>
>>Awl --
>>
>>http://en.wikipedia.org/wiki/Water_jet_cutter is a neat article on water
>>jets, showing 5 axis cutting.
>>
>>But they comment that water jet cutting can be done with water alone,
>>*without abrasive*, achieving much finer cuts. Abrasive cuts vary from
>>.020
>>to .050, while non-abrasive cuts vary from .003 (!!) to .013.
>>
>>When is non-abrasive cutting used? Often?
>>I would imagine it would be for thin and/or soft material.
>
> Water is usually used for non ferrous metals, sheet metals, many types
> of hard plastics and what have you, under 1/4" thick. Adding the
> abrasive REALLY increases the cutting power. And surprisingly..not all
> that much abrasive is actually added.
>>
>>What's the thickest material that can be cut with abrasives+water?f
>
> Ive seen 4" thick aluminum on a BIG water jet table. No idea what the
> max is.
The pressures are awesome -- over 90,000 psi for the stronger units! holy
shit, I didn't know that was even possible.
That's proly one expensive effing pump....
Which suggests an upper limit to the psi for flood coolant -- too high and
you'd actually dull yer tooling, erode yer material!
I'll bet 5,000-10,000 psi is the practical limit for VMC-type coolant, proly
closer to 5,000.
I think some people here have 3,000 psi coolant -- that's some big-dick
machining, yo....
Pressure washers max out at about 3,000 psi, and they indeed can do a lot of
damage, house-wise, gouging wood, damaging shingles, like my asshole
neighbor does.
--
EA
Wes
>When is non-abrasive cutting used? Often?
>I would imagine it would be for thin and/or soft material.
Fiberglass headliners in automotive applications. Worked really good for that.
Wes
--
"Additionally as a security officer, I carry a gun to protect
government officials but my life isn't worth protecting at home
in their eyes." Dick Anthony Heller
Cliff
<UNfi...@UNoptonline.net> wrote:
>The pressures are awesome -- over 90,000 psi for the stronger units!
Well over.
> holy
>shit, I didn't know that was even possible.
Compression of the water happens too.
>That's proly one expensive effing pump....
Usually piston pumps.
Need special (very) fittings & hoses .....
--
Cliff
Robert Roland
<UNfi...@UNoptonline.net> wrote:
>What's the thickest material that can be cut with abrasives+water?
I don't know what the max is, but a local machine owner advertises up
to 300mm, which is about at foot in your money.
--
RoRo
Mach1
"Robert Roland" <fa...@ddress.no> wrote in message
news:763ml59abr7rkvsv1...@4ax.com...
Talked to a business several years ago about getting some plate cut. Told
me about a 6" marble slab that he cut. Was sent oversize. Sent it back to
be recut or get it cut locally? He used his water jet. Said that the only
way he knew it was still moving during the cutting was to watch the monitor.
It was still cheaper then sending it back east to be recut.
Wes
>"Existential Angst" <UNfi...@UNoptonline.net> wrote:
>
>>When is non-abrasive cutting used? Often?
>>I would imagine it would be for thin and/or soft material.
>
>
>Fiberglass headliners in automotive applications. Worked really good for that.
We tended to use 0.005" dia diamond nozzles at 41,000 psi. We had a S-RIM application
where we went to 0.008" and cranked the pressure up to 50,000 psi.
The only metal we cut were our waterjet fixtures ;) They tended to erode where there were
dwells to make sharp corners.
Ed Huntress
"Existential Angst" <UNfi...@UNoptonline.net> wrote in message
news:4b5ac0a9$0$4993$607e...@cv.net...
>
> http://en.wikipedia.org/wiki/Water_jet_cutter is a neat article on water
> jets, showing 5 axis cutting.
>
> But they comment that water jet cutting can be done with water alone,
> *without abrasive*, achieving much finer cuts. Abrasive cuts vary from
> .020 to .050, while non-abrasive cuts vary from .003 (!!) to .013.
>
> When is non-abrasive cutting used? Often?
Sarah Lee. They use them for slicing the cakes in your supermarket freezer.
Also, insulation materials, fabric, and foil-thin metals, especially
aluminum.
steamer
--
"Steamboat Ed" Haas : To help the helpless
Hacking the Trailing Edge! : To comfort the fearful...
www.nmpproducts.com
---Decks a-wash in a sea of words---
Wes
>> When is non-abrasive cutting used? Often?
>
>Sarah Lee. They use them for slicing the cakes in your supermarket freezer.
I forgot about that one. Sarah Lee has a plant not too far away. I remember the IR
representative talking about that.
Martin H. Eastburn
It is great to go the the scrap yard in town and see the CNC cut scraps!
They await the oxygen lance as the other methods just can't get there
when done by hand (heat and gas cost).
Martin
Kirk Gordon
> Awl --
>
> http://en.wikipedia.org/wiki/Water_jet_cutter is a neat article on water
> jets, showing 5 axis cutting.
>
> But they comment that water jet cutting can be done with water alone,
> *without abrasive*, achieving much finer cuts. Abrasive cuts vary from .020
> to .050, while non-abrasive cuts vary from .003 (!!) to .013.
>
> When is non-abrasive cutting used? Often?
> I would imagine it would be for thin and/or soft material.
>
> What's the thickest material that can be cut with abrasives+water?
Well, let's see...
The granite under Niagara falls is 250 feet high, and it gets worn
away by something like a foot per year.
The Grand Canyon is about a mile deep, and it was cut entirely by
water, and the bits of rock and sand the water carried with it.
So the answer is, you can probably cut just about any thickness, and
just about any material. The only technical problems to be solved are
precision and production rate.
Stay tuned.
KG
Kirk Gordon
This is sorta related, and might be of interest. Where I work, we
do a lot of micro-sand-blasting. Tiny nozzles, and very fine grits
(down to baking soda and talcum powder, literally) for very precise
deburring of small parts, and very consistent control of surface finishes.
It works well; but it's a PITA. Even with vacuum systems, and
enclosures and containement and all the rest, we still deal with the
grit getting where we don't want it. And in a precision machine shop,
grit of any kind is bad news.
So there's been some talk about a new process: dry ice blasting.
The equipment makes dry ice, pulverizes it according to the desired grit
parameters, and then uses is (quickly, I'd guess) just the way we now
use powders and glass beads. And after the sharp, hard little ice
crystals have kamikaze'd into the work, and have done their jobs, they
just evaporate, and are wisked away by relatively small and simple
vacuum systems that don't need filters or baffles or cleanounts, or
anything else like that.
The instant I heard about it, it made sense, and I kicked myself
twice because I didn't think of it.
KG
Gunner Asch
wrote:
But...but..but Kirk!! Thats CO2 Production! Dry Ice is CO2! You will
burn us all up with Gorbal Warming!!!!
<VBG>
Gunner
Existential Angst
"Kirk Gordon" <k...@gordon-eng2.com> wrote in message
news:4B5C9CA...@gordon-eng2.com...
> Existential Angst wrote:
>> Awl --
>>
>> http://en.wikipedia.org/wiki/Water_jet_cutter is a neat article on water
>> jets, showing 5 axis cutting.
>>
>> But they comment that water jet cutting can be done with water alone,
>> *without abrasive*, achieving much finer cuts. Abrasive cuts vary from
>> .020 to .050, while non-abrasive cuts vary from .003 (!!) to .013.
>>
>> When is non-abrasive cutting used? Often?
>> I would imagine it would be for thin and/or soft material.
>>
>> What's the thickest material that can be cut with abrasives+water?
>
>
> Well, let's see...
>
> The granite under Niagara falls is 250 feet high, and it gets worn away
> by something like a foot per year.
1 foot per year? Heh, I think at that rate, over geologic time, we'd be
down to china by now.
Mebbe a fraction of an inch per year?
Don't forget, the water is falling *into water*, which is essentially
coating the granite. The only thing eroding after the pools build up any
depth is the flowing water itself, which is proly .001" per year, on solid
granite.
But the overall point is legit. Sheeit, wind can erode stuff....
--
EA
Existential Angst
Gorbal as in Gorebal?? Hilarious!!
That's actually very good!!
Did you make that up? If not, who did?
--
EA
>
> <VBG>
>
> Gunner
>
Gunner Asch
Algore of course. He and his minions made it up.
Gunner
Wes
> So there's been some talk about a new process: dry ice blasting.
>The equipment makes dry ice, pulverizes it according to the desired grit
>parameters, and then uses is (quickly, I'd guess) just the way we now
>use powders and glass beads. And after the sharp, hard little ice
>crystals have kamikaze'd into the work, and have done their jobs, they
>just evaporate, and are wisked away by relatively small and simple
>vacuum systems that don't need filters or baffles or cleanounts, or
>anything else like that.
>
> The instant I heard about it, it made sense, and I kicked myself
>twice because I didn't think of it.
We used dry ice blasting for cleaning built up mold release on our srim forming tools.
Worked fantastic.
Garlicdude
> So there's been some talk about a new process: dry ice blasting. The
> equipment makes dry ice, pulverizes it according to the desired grit
> parameters, and then uses is (quickly, I'd guess) just the way we now
> use powders and glass beads. And after the sharp, hard little ice
> crystals have kamikaze'd into the work, and have done their jobs, they
> just evaporate, and are wisked away by relatively small and simple
> vacuum systems that don't need filters or baffles or cleanounts, or
> anything else like that.
>
> The instant I heard about it, it made sense, and I kicked myself
> twice because I didn't think of it.
>
> KG
>
Kirk, What about CO2 and global warming? :)
Best,
Steve
--
Regards,
Steve Saling
aka The Garlic Dude �
Gilroy, CA
The Garlic Capital of The World
Paul K. Dickman
"Existential Angst" <UNfi...@UNoptonline.net> wrote in message
The 1ft/year rate is how fast the edge of the falls move up river, not how
deep it cuts the channel.
It used to be a lot faster but we reduced the flow,
What is the Future of the Falls?
a.. The Falls will continue to erode, however, the rate has been greatly
reduced due to flow control and diversion for hydro-power generation.
b.. Recession for at least the last 560 years has been estimated at 1-1.5
m/yr.
c.. Its current rate of erosion is estimated at 1 foot per year and could
possibly be reduced to 1 foot per 10 years.
d.. The current rate of recession is unclear; assessing its value remains
the responsibility of the International Joint Commission. The International
Boundary Waters Treaty stipulates the minimum amount of flow over the falls
during daytime, nightime and the tourist season.
http://www.niagaraparks.com/media/geology-facts-figures.html
Paul K. Dickman
Stuart Wheaton
I know somebody who worked for a company that did this dry ice blasting
for bridge repainting. No blasting grit made clean-up and control of
jobsite debris much easier and cheaper.
And NO, it isn't a CO2 global warming issue, because the CO2 used is CO2
extracted from atmospheric CO2 in the first place, usually as a
by-product of air liquifaction to generate liquid O2 for steel mills.
Global warming CO2 comes from humans burning Carbon stored for millions
of years as hydrocarbons and coal, and releasing them into the air as
CO2 over a few centuries.
Flash
"Martin H. Eastburn" <lion...@consolidated.net> wrote in message
news:hHR6n.139851$5n7.1...@en-nntp-09.dc1.easynews.com...
I was at a trade show in Philly in the early 90's and they had one of these
things and they used it to cut a chocolate cake in wedges. Slicker than you
could ever do with a knife, fast, and it didn't get the cake soggy, either.
The water was traveling too fast. Incomprehensible a few years ago,
matter-of-fact today. Wowie !
Flash
dan
rec.crafts.metalworking mine and will die if we don't mount a rescue
by Sun, 24 Jan 2010 14:24:50 -0500:
> So there's been some talk about a new process: dry ice blasting.
>The equipment makes dry ice, pulverizes it according to the desired grit
>parameters, and then uses is (quickly, I'd guess) just the way we now
>use powders and glass beads. And after the sharp, hard little ice
>crystals have kamikaze'd into the work, and have done their jobs, they
>just evaporate, and are wisked away by relatively small and simple
>vacuum systems that don't need filters or baffles or cleanounts, or
>anything else like that.
>
> The instant I heard about it, it made sense, and I kicked myself
>twice because I didn't think of it.
I hear they use it to clean crap off of very old paintings.
--
Dan H.
northshore MA.
Zymrgy
wrote:
>
> The pressures are awesome -- over 90,000 psi for the stronger units! holy
> shit, I didn't know that was even possible.
> That's proly one expensive effing pump....
> EA
They are damn expensive machines....lots of overhead. The pumps need
rebuilding every couple of months...the garnet is expensive...the
nozzles need to be replaced & those things don't come cheap. You gotta
charge something like $120/hr to make any money on these things. As
far as material thickness...we have cut 8" thick steel. It does not
happen fast, but it does happen. On our 5 axis machine you can adjust
the angle of the nozzle you pretty much eliminate the taper....pretty
cool stuff.
Existential Angst
news:ec7cbc30-2b03-4b88...@a32g2000yqm.googlegroups.com...
=====================================================
Man, your shop must have the biggest dick in the neighborhood!
Heh, who'da thunk that effing water cutting would be expensive, eh?
Hilarious.....
8" is effing awesome, tho. What ipm??
I wonder what thickness lasers can cut...
The big-dick sheet metal place by me has Amada lasers, but mostly used on
very hard thin-ish unpunchable stuff, like 1/4" spring steel, complex 2-D
shapes. Good size kerf, tho, proly as much as water jet cutting.
--
EA
Zymrgy
wrote:
>
> Man, your shop must have the biggest dick in the neighborhood!
>
> Heh, who'da thunk that effing water cutting would be expensive, eh?
> Hilarious.....
>
> 8" is effing awesome, tho. What ipm??
>
> I wonder what thickness lasers can cut...
> The big-dick sheet metal place by me has Amada lasers, but mostly used on
> very hard thin-ish unpunchable stuff, like 1/4" spring steel, complex 2-D
> shapes. Good size kerf, tho, proly as much as water jet cutting.
> --
> EA
I just talked to the waterjet guy here.....we have actually cut 14"
thick aluminum. Had to make a fixture so the part would actually sit
down inside the tank. Very slow tho....like less than 1ipm. Biggest
pain in the ass bout the machine is even tho it has a garnet
reclaimer....it don't work worth a shit. So every couple of months the
machine is down while a couple of part timers get to climb in the tank
and shovel all the sand out. Its a pretty big tank too....like 10' by
20' by 3 ft deep. Used to have a mountain of sand out back...the shit
builds up after a few years. The city wound up taking it to use for
fill on some road project.
BottleBob
> Well, let's see...
>
> The granite under Niagara falls is 250 feet high, and it gets worn
> away by something like a foot per year.
KG:
A foot a year, eh? Thats like 60 minutes X 24 hours X 365 days or
526,600 minutes a year. Divided into 12 inches = .000022787 inches per
minute. Actually, 22 millionths per minute is much more than I thought
it would be. Any customers would need a hell of a lead time cutting at
that rate.
--
BottleBob
http://home.earthlink.net/~bottlbob
Stuart Wheaton
Sure, but given that the falls are 1060 feet long and 176 feet tall,
that translates into 612.165 cubic inches of material removed every minute.
David R.Birch
Which reminds me:
Every 6 or 8 weeks we get to shovel cubic yards of garnet and metal
powder out of the bottom of our Flow waterjet.
Anybody know of a system for removing this?
Any ideas for something useful to do with cubic yards of fine red sand
with finer junk in it?
David
Terry
Omax has a solids removal system for their machines. Its a system that
pumps water from the bottom of your working tank into a holding bin and
returns the effluent. The holding bin is self tipping and we use our
forklift to dump it into our city waste bin. There is far less than 1%
metal content, so no contamination issues for our city govt.
Martin H. Eastburn
or something like that. Might be a place to get them come and get it.
Martin
Half-nutz
Why couldn't a water jet have a chip conveyor or equivalent?
Sure it is a high wear environment, but it wouldn't have to move very
fast, thus not wear out too fast.
Hmmmm, magnetic separator. settling tank, Cyclonic separator.
Or just jets along the bottom to move the grit to one end..
larryrozer
>
> Every 6 or 8 weeks we get to shovel cubic yards of garnet and metal
> powder out of the bottom of our Flow waterjet.
>
> Anybody know of a system for removing this?
Yellow Bellied Sump Sucker (maybe). This one seems a little high, if
you keep an eye on the auctions you can get them for less.
Existential Angst
news:hjij4...@news4.newsguy.com...
Well, here's a Q:
If the waterfall is being eroded back so quickly, how are the turbines able
to still catch the water? Are they being moved back, to keep up?
--
EA
>
> Paul K. Dickman
>
Winston
(...)
> Any ideas for something useful to do with cubic yards of fine red sand
> with finer junk in it?
Stuff sells for $40.00 a pound on eBay.
See Item number: 350290224889
--Winston
Gunner Asch
Blink blink...ooookay.~ Good question!
Grumpy
Snip
>
> Which reminds me:
>
> Every 6 or 8 weeks we get to shovel cubic yards of garnet and metal powder
> out of the bottom of our Flow waterjet.
>
> Anybody know of a system for removing this?
>
> Any ideas for something useful to do with cubic yards of fine red sand
> with finer junk in it?
>
> David
What about one of those swimming pool cleaning units that used to flap
arount the bottom of a swimming pool and collect all the dirt from it? They
moved around in a random fashon, and eventually covered all the bottom of
the pool. The water from it could be settled andreturned after filtering for
re-use
David R.Birch
> Wonder if the local concrete company or blacktop company would buy it
> or something like that. Might be a place to get them come and get it.
>
> Martin
It's worth a try, but probably not enough volume to make it worthwhile.
David
Existential Angst
Proly there are horizontal "catch tubes" for the turbine water? That mebbe
already go back a cupla hundred feet into the upper river.
But, as the erosion continues, those horizontal lengths become less and less
supported.....
We should be able to see those horizontal catch tubes in google maps.
Inybody got a zip code??
--
EA
>
>
Paul K. Dickman
"Existential Angst" <UNfi...@UNoptonline.net> wrote in message
Most of the water is diverted to ponds about 3-4 miles upstream.
Paul K. Dickman
Existential Angst
Oh, yeah, saw sumpn about that on History.... really quite an engineering
feat.
Here ahm thinkin effing paddlewheels at the base of the falls..... :)
Still, that erosion rate is incredible. Who'da thunk?
danmitch
> On Tue, 26 Jan 2010 01:02:23 -0500, "Existential Angst"
> <UNfi...@UNoptonline.net> wrote:
>
> <snip>
>>
>>Well, here's a Q:
>>
>>If the waterfall is being eroded back so quickly, how are the turbines able
>>to still catch the water? Are they being moved back, to keep up?
>
>
>
> Blink blink...ooookay.~ Good question!
>
>
The turbines (powerhouse) are not AT the falls, they are downstream in
the gorge. They work on the difference in water height between the
upstream and downstream side of the falls ... just like if a dam were
present. The water to the powerhouse is diverted from the river a
considerable distance upstream (above the falls), and brought to the
powerhouse via a canal. From the canal at the top of the gorge, the
water is then dropped to the turbines at the bottom via the usual
penstocks (large tubes).
Variations of this are used in most waterfall-related power stations.
Tthe falls themselves are usually not involved in the power generation
at all.
Dan Mitchell
============
--- news://freenews.netfront.net/ - complaints: ne...@netfront.net ---
Gunner Asch
RBnDFW
danmitch
NEAT!
Ther are a variety of power stations tapping the water resources of
Niagara, some in the USA and some in Canada. Each uses a slight
variation of the basic system I described earlier. Google: "Niagara
power generation". For some examples see:
<http://www.technology.niagarac.on.ca/staff/mcsele/images/Decew-Aerial.jpg>
<http://en.wikipedia.org/wiki/Robert_Moses_Niagara_Power_Plant>
<http://commons.wikimedia.org/wiki/File:Adam_Beck_Complex.jpg>
One of the oldest installations, the Schoellkopf Electric power station,
was destroyed by a landslide in the 1950's, when the highwall collapsed
onto the powerhouse. It was quite the mess.
<http://www.niagarafrontier.com/image/PLschoellkopfcollapse.jpg>
There are motion picture films of this happening.
The results looked similar to the recent massive damage at the Russian
dam and powerhouse, caused by poor maintenanace of the turbines. That
incident was posted here earlier.
Stuart Wheaton
> On Sun, 24 Jan 2010 19:01:42 -0500, Stuart Wheaton <sdwh...@fuse.net>
> wrote as underneath
>> And NO, it isn't a CO2 global warming issue, because the CO2 used is CO2
>> extracted from atmospheric CO2 in the first place, usually as a
>> by-product of air liquifaction to generate liquid O2 for steel mills.
>> Global warming CO2 comes from humans burning Carbon stored for millions
>> of years as hydrocarbons and coal, and releasing them into the air as
>> CO2 over a few centuries.
>
> And where does all the power come from to pull the CO2 out of the
> atmosphere, liquify it ,
Since the CO2 is an early fraction as you cool air to liquid, it is
essentially free, since it has commercial value it is captured instead
of vented. The power would be consumed anyways.
> solidise it , cart it around the country!
This is not much greater than the energy required to haul and use
traditional blasting media, but because it is evaporated after use, the
energy required to collect and transport the used grit is largely
eliminated.
> Just
> because a bit of the system is a by-product of a massively G warming
> industry doesnt mean that it doesnt really count!
Sure, but until we figure out how to build infrastructure that does not
need to be maintained, then something has to be done. Perhaps we can
give 100 inmates a wire brush??? but then you'd have to haul them to
the job site, erecrt scaffolds, and they'd need more food because they
were working harder, and that food production would generate more CO2...
Martin H. Eastburn
the pool and corrode the copper pipes. Other metal can do like nasty.
Wondering if you do Al and steel and get both together... dislike metals
conduct current and that combo is termite.
The metal in it would be a problem.
Pretty cement would stain, but not make a difference in some places or
oil/tar would be just fine.
Martin
Martin H. Eastburn
Martin
David R.Birch
This is much coarser than the abrasive grit used by the waterjet.
David
Winston
Grade and package it in mineral oil for sale
as glass polishing compound?
http://www.mcmaster.com/#glass-polishing-compounds/=5k2ovo
--Winston
Paul Hovnanian P.E.
The diversion dam (where water is redirected into the penstocks) is probably
a few hundred yards upstream of the falls. The penstocks carry that water a
few hundred yards downstream of the falls to the powerhouse. So the
diversion dam may have to be moved upstream every few thousand years.
--
Paul Hovnanian pa...@hovnanian.com
----------------------------------------------------------------------
Have gnu, will travel.
sparky
wrote:
> "Zymrgy" <zym...@gmail.com> wrote in message
>
> news:ec7cbc30-2b03-4b88...@a32g2000yqm.googlegroups.com...
> On Jan 23, 4:01 am, "Existential Angst" <UNfit...@UNoptonline.net>
> wrote:
>
>
>
> > The pressures are awesome -- over 90,000 psi for the stronger units! holy
> > shit, I didn't know that was even possible.
> > That's proly one expensive effing pump....
> > --
> > EA
>
> They are damn expensive machines....lots of overhead. The pumps need
> rebuilding every couple of months...the garnet is expensive...the
> nozzles need to be replaced & those things don't come cheap. You gotta
> charge something like $120/hr to make any money on these things. As
> far as material thickness...we have cut 8" thick steel. It does not
> happen fast, but it does happen. On our 5 axis machine you can adjust
> the angle of the nozzle you pretty much eliminate the taper....pretty
> cool stuff.
>
> Man, your shop must have the biggest dick in the neighborhood!
>
> Heh, who'da thunk that effing water cutting would be expensive, eh?
> Hilarious.....
>
> 8" is effing awesome, tho. What ipm??
>
> I wonder what thickness lasers can cut...
> The big-dick sheet metal place by me has Amada lasers, but mostly used on
> very hard thin-ish unpunchable stuff, like 1/4" spring steel, complex 2-D
> shapes. Good size kerf, tho, proly as much as water jet cutting.
> --
> EA
Just saw an advertisement for a new use for water jet cutting. They
are using it as a replacement for liposuction to remove lard from
obese people. it is supposed to be a safer and less painfull way to
remove lard than the original system.
Gunner Asch
wrote:
Holy shit! Thats a bad bad fall. How many died?
Gunner