Explosive forming
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- Опубликовано: 28 сен 2024
- Explosive forming is a metal working process in which an explosive is used to force a sheet of metal into a mold.
You can checkout my main channel if you're interested in a longer format science video about rockets and spacecraft
/ @reflectivelayerfilm .
*I'm glad that last molecule of air made it out safely.*
That's a good one! I had to run the simulation a few times before they were all able to get out in time.
@@operationalfacts5602 What software was this simulated with if I may ask?
I use Godot. An open source game engine.
godotengine.org/
@@operationalfacts5602 awesome, thank you for your quick reply. I'll check it out, seems interesting
😂😂😂
The spherical tanks video brought us here...
Thanks for stating that. I was wondering what was causing the sudden increase in views.
Facts
It's a conspiracy to get more workers into the spherical tanks industry
yup
Yes
Don't know why the algorithm started feeding me explosive/hydroforming videos the past two weeks. I finally broke down, when I saw a 1:00 video (this one) explaining the concept. Still have no clue why this topic has been so heavily recommended by YT, but now I know a new manufacturing technique.
See you all again in 7 years when this is recommended to everyone
Fun fact: This was the main way metal processing was done in the German Democratic Republic (East Germany) throughout it's existence. After World War two, the soviets demounted most industry and machinery, including hydraulic presses for sheet metal, heavy lathes and mills to help rebuild the destroyed soviet union. This led to massive deficit in production capacity of the country and made is impossible to produce many of the products that were necessary for civilian and military life. The workarounds included making cars from cotton composites (Looks up the trabbant) or forming sheet metal using explosives. This process only requires a mold, water and explosives. Water and explosives where readily available in the post war east germany, the mold would be needed regardless of the process. So this process soon became the main way of working sheet metal parts for large scale production.
I was anxious for the last air molecule in the mold
This is great - it explains the technique simply and with a visual aid that perfectly demonstrates the process.
From 0:41 onwards - shouldn't the blue colour of water come down along with the metal's orange line?
Picky, picky, picky...
Good point. I never notice that.
They probably used Windows ME to do the graphics.. I think they found a way to get Windows 10 to fill that bit in now
I’m familiar with this metal forming technique, but we use to call it “putting warheads on foreheads”. Turns metal tanks into scrap.
I love how you're taking this sudden quirk of the algorithm in stride and handling questions patiently and eloquently.
Thanks. I try to put my best foot forward.
It has also been used to weld different hardnesses of armor together.
I thought this was a tutorial on how to make explosives
I felt like Neo... “I know explosive forming”
Thanks, the animation made it a lot clearer :D
Just one more question, is the hole to let the air out small? are they a lot of small holes? does it have a mesh or something? or why does the metal not deform to have a "nipple" where the hole is? I guess the metal is strong enough to not deform that way?
I don't know the exact diameter of the evacuation port but yes it must be small. Any protrusion caused by the evacuation port should be small enough that it can be "sand down" after the forming is done.
Here's a paper on the that. It's long but you can skip to page 22. That's were they talk about the die and things to consider when making it.
It's from the Apollo era so it's kinda old.
apps.dtic.mil/dtic/tr/fulltext/u2/605372.pdf
what kind of mold do i use? i heard that i shouldn't use black mold because if you breath it in you can die
Well Done
Does the water get forced into the cavity that gets formed? The animation seems to imply that water just kind of hangs in "mid air" as it were during the process, leaving a vacuum. In that case, what medium does the wave travel through? Seems to me, the water must be doing the forcing, since the wave could otherwise just travel through the work piece without deforming it. In any case, it is pretty clear that setting off an explosive in water (or air for that matter) would cause some fluid to flow outwards, in this case, into the work piece.
Yes that's a mistake in the animation.
Someone has been playing with sandbox physics simulator ....
Thanks, can you give examples where this technique is used?
Yes, sure. One use was to form sections of the bulkhead of the 2nd stage fuel tank of Saturn 5.
history.nasa.gov/SP-4206/ch7.htm
Section: S-II CONFIGURATION -> 4th paragraph
Parts of Aircraft fuselage are also sometimes created this way.
www.iter.org/newsline/196/932
@@operationalfacts5602 thanks a bunch!
ruclips.net/video/96yhdnhPxAw/видео.html
@@operationalfacts5602 Thanks for the NASA link. Lots of great information.
@Duane Degn No problem. Glad I can help.
Please tell me which material be used for explosion
That is cool.
I like it.
Are you manually animating this or is it a particle simulation?
It's physics simulation via the Godot game engine.
The engine doesn't support physics on particles yet.
Our lord and savior Godot Engine!
i don't see any mold in the sphere tank video, and it expand outward without any cover
This is the same process but instead of the water pressing from the inside of the tank to make it sphere, in this process the water forces a sheet of metal into the shape of the mold. In both cases the water is driven by an explosion.
When did this method come into practice ?
Seems different to the earlier method where people just pushed in pressurised water etc....
This explosive method seems not too old cos i only just saw it recently ....it must be 3-4 years old at the most i guess ?
I think someone on another video said the US was using it to form army tank turrets in the 1970's
It seems relatively new for home hobbyists though.
Why didnt the water fall in to the cavity ., Hmmmmm m
It should. That is a mistake in the animation.
👍🏻👍🏻👍🏻
Algorithms huh
how animu mammaries made
I once saw this video (ruclips.net/video/Sk9WyEfzWPg/видео.html)
Is it using explosive just like this but water is inside?
Yes, water and explosives are inside the work piece.
I swear, I watch one video where they blow up water to make sphere tanks and now my entire feed is explosive forming videos.
This is why we need manual suggestion rates for the algorithm.
Nice video though.
I dunno, i kinda enjoy this quirk of the YT suggestion-algorithm
You can tell RUclips you don't like a suggestion. Just push the 3 dots.
@@eyescreamcake Yeah, doesn't work
@@eyescreamcake i used that feature and it completely ruined my recommendations, it stopped offering me different videos, would have the same videos for weeks at a time
Man, I'm so happy all the air molecules made it out there before the shockwave!
A Die, not a mold, mould, nor moulde. I am an explosive hydroforming die maker...of 36 years.
Thanks for the correction.
@@operationalfacts5602 Molding is when the material formed undergoes a phase change from liquid to solid, in dies no phase change occurs.
ps: you're welcome.
please tell me yall aint dumb and do more than one direction at a time?
@@kblskables2877 the previous generation formed the fuselage of the X-15's from Inconel-X. We still posessed and inspected those dies, when I apprenticed.
Spherical tanks
Yeeee
The balls harden
@@frozensilent
Hard Balls!
🤣😂🤣😂🤣
CORRECTION!! There's an error in the Animation starting at 0:42. The water is suppose to fill in the area above the metal sheet as it's pressed into the die. Sorry about that.
Well its 1 year too late
I was searching for this for so long!!🙏🙏🙏
Thank you
Glad I can help.
I watched one video about making giant balls spherical and now youtube is recommending me explosive forming videos
And this is supposed to be cheaper than a press?
Yup...the tank might hold hundreds of forms to be shaped with one blast.
Some modes of metal failure happen over time; sudden re-shaping doesn't give time for stress to accumulate.
Residue from the explosive, especially from TNT/Semtex/C4, can be rich in nano-scale diamonds.
The balls explode
Searching for high energy rapid forming and I get this video. So no complaints. Its quite correct and concise.
Isn't there, also, a form of "welding" where two materials are fused with an explosion? I have seen it on TV many years ago but can you make a video about that? And the sphere shaping. Thanks! (Water does NOT compress!!) ;-)
yes it's called Explosive Welding.
ruclips.net/video/I3GhNAUccJY/видео.html
The first time, it was used in mass production, was the front axle for the east german L60 Truck
Worst way to hydroform.
Safe though.
The last two molecules of air reminds me of The tortoise and rabbit story.☺️
liquid shockwave forming should be called
This is why the balls harden
If you look at a metal form, is it possible to tell if it was made this way? Does the percussive force interfere with the integrity of the finished item? Is there a failure rate, if so, what? Thanks in advance!
I don't know if you can tell which forming process was used(at least not visually). Considering this technique is used to create pressure tanks among other things, I don't think failure rate is worse than other forming techniques. I couldn't find solid data on that.
That's Crazy And Cool!
Respect
Humans are so clever.
I still don't get it.
Good job!
👍
Could you do a video on how this process is used to form a sphere?
I've used explosive forming to open a few doors before. super handy
Blow mold operations have been around for a long time. Explosive molding is the same thing, just a different measure of operations. It's fluid dynamics creating a malleable representation if the molding and is nothing new people.
Coca cola bottles are made the same way but with air pressure instead of using barometric pressure of water with a displacement greater than the steels structural integrity.
The question is what are they not telling you about this method? What kind of explosive is used? Because we all know explosives have different disbursement rates.
Is it something that they have a patent on or is it something that can be purchased?
What's the difference between this and the one where its just a sphere out in the open?
With this method the water is contained inside a container. The work piece is placed inside the container and it's a sheet of metal which is forced into a mold by the water. In the sphere method the work piece is also the container of the water. The water pushes from the inside with equal force on all sides forcing the work piece into a sphere. Same principal, different setup.
@@operationalfacts5602 Ah thanks for the answer. I didn't think of there being water inside the sphere.
Freaking spherical tanks
very well illustrated and very well explained. superb ! thx a lot !
Extremely simple yet mega useful technique!!!!!
Americans invented this?
Interaction +1
Interesting
do you have an example of this manufacturing process
Yes, sure. One use was to form sections of the bulkhead of the 2nd stage fuel tank of Saturn 5.
history.nasa.gov/SP-4206/ch7.htm
Section: S-II CONFIGURATION -> 4th paragraph
Parts of Aircraft fuselage are also sometimes created this way.
www.iter.org/newsline/196/932
Can you tell me, which explosive we use into the water to get this strong explosion
Trinitrotoluene (TNT) is usually used. Pentaerythritol tetranitrate (PETN) is also used.
One of the noisy ones...
Would composition b work?
3 sparklers