[HN Gopher] Heatsink Skiving (2021) [video]
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Heatsink Skiving (2021) [video]
Author : zdw
Score : 83 points
Date : 2022-04-14 14:19 UTC (8 hours ago)
(HTM) web link (www.youtube.com)
(TXT) w3m dump (www.youtube.com)
| _Microft wrote:
| _Users who liked this might also
| like:https://old.reddit.com/r/ManufacturingPorn/_
|
| Industrial or manufacturing processes are so interesting to watch
| and there are so many details to discover. Separating eggs is
| pretty interesting imo: they let them run down a v-shaped channel
| that has a narrow opening between the sides. The egg whites seep
| through that opening while the yolks run along the channel and
| are guided elsewhere eventually [0].
|
| Carrots [1] are peeled by moving them through peelers whose
| blades don't look that different from a usual kitchen tool.
|
| Bottle production [2].
|
| [0] https://youtu.be/bG34uNbe5f4?t=365
|
| [1] https://youtu.be/C1q2sqfQPqU?t=24
|
| [2] https://www.youtube.com/watch?v=A_M8WBJMcM0
| mmastrac wrote:
| Thanks, I just wasted about 29 minutes on this sub watching
| everything.
| gerard1234 wrote:
| a1371 wrote:
| That's fascinating to watch. I am curious why this would be a
| faster & more robust production process compared to extrusion. I
| would have guessed it's easier to build it some conventional way.
| aparks517 wrote:
| Thinking about how an extrusion die is made, I imagine it's
| tricky to make very thin fins and to put them very close
| together. Copper work-hardens significantly too, which may be a
| factor.
| lazide wrote:
| Copper doesn't extrude well for small parts for reasons note,
| as well as it's overall strength is quite high - yield
| strength of 20k psi, tensile strength of 32k psi. and it has
| a pretty high melting and annealing point.
|
| Extruding non-trivially sized parts starts to require some
| rather extreme equipment quickly, but is done for larger bulk
| electrical components, pipes, and tubes.
|
| Aluminum heat sinks are extruded regularly. Aluminum tends to
| be used where heat sinking requirements are less severe, as
| it has less ideal thermal properties. A lot cheaper though.
|
| If someone is paying the premium for copper, they probably
| want maximum thermal performance - which also means maximum
| surface area hence more and thinner fins (as long as the
| material is thermally conductive enough to keep them 'fed'
| with heat anyway).
|
| Edit: update details.
| ortusdux wrote:
| One advantage is that the blade does not need to be linear.
| This allows for the creation of patterned fins which my have
| more ideal properties.
|
| https://www.youtube.com/watch?v=ghrjJ1OL6jM
| antattack wrote:
| To skive: avoid work or a duty by staying away or leaving early I
| wonder how it came to be called skiving?
|
| EDIT: apparently it's origin is french word esquiver which means
| to slink away
| bajsejohannes wrote:
| Interesting. I wondered if it was related to the
| Norwegian/Danish "skive" [1], which means to cut or a cut of
| something.
|
| [1] which could even be inflected like "skiving", though
| realistically it might not ever have
|
| edit: of course, it might be that "skive" and "esquiver" are
| related...
| thesaintlives wrote:
| Fabulous! That is a perfect production process. Thanks for
| sharing.
| [deleted]
| ncmncm wrote:
| For those who do not immediately see what is going on:
|
| All those heatsink fins you see were just cut and stood up. Each
| stroke cuts and stands up another one.
| lancefisher wrote:
| I learned about skiving when I started researching building a
| watercooled PC. Optimus is building some nice heatsinks/water
| blocks in Chicago. They're using a micro CNC process for very
| fine fins in their cold plates, and mention some of the
| differences on their site.
| https://optimuspc.com/products/optimus-gpu-replacement-cold-...
| buildbot wrote:
| Thanks for this link, I was not aware of this company before
| and they look like an awesome waterblock company. Good USA
| based alternative to EK (with less selection obv.)
| philjohn wrote:
| The other good brand is Heatkiller. Their pump/res combos are
| really nice, as are their water blocks.
| AceJohnny2 wrote:
| _" Choose corrosion-proof electroless nickel finish when using
| liquid metal"_ !?
|
| What are people using?
| blamazon wrote:
| Copper is very ductile (soft) compared to many other metals
| because it is molecularly arranged in a cubic arrangement, while
| other less ductile common metals tend to be arranged hexagonally
| or are alloys of multiple elements. The mono-elemental cubic
| arrangement has more horizontal planes. Horizontal planes of
| molecules can 'slip' past each other more easily, and in the
| electron soup that characterizes metal the bonds between those
| molecules can more easily "stretch" without breaking. This is why
| you'll find ceramics with a cubic structure that are brittle and
| prone to breaking in layers, rather than being ductile. It's also
| why metals are great conductors!
|
| If you like this kind of stuff, check out introductory
| undergraduate level 'materials science' course materials! There's
| tons of lectures and educational content on YouTube and textbook
| PDFs are bountiful on the net :)
| bityard wrote:
| Yep but copper does lose ductility when deformed. When put
| under enough stress to deform it, it "work hardens." This is
| why thick copper wires break if bent back and forth too much
| (and hence why we have multi-stranded wires for applications
| with movement and vibration), and why crush-sealing washers
| can't be reused. This work hardening can be undone by heating
| the copper until it gets red hot, but this isn't practical in
| many applications.
| MisterTea wrote:
| I was under the impression crush seals are used once not
| because of work hardening but from deformation. You can only
| crush them into place once. e.g. on conflat vacuum flanges
| the harder stainless steel knife edge on the flanges sandwich
| the copper gasket biting into it creating a tight metal-to-
| metal seal. That biting plastically deforms the copper
| forcing it into the tiny surface imperfections in the
| stainless to form an extremely tight seal. Once you break
| that formed copper seal it is permanently damaged. It cannot
| be reused as the mating area has has been deformed and the
| majority of its material squeezed away from the mating area.
| You have to start over with a fresh flat seal that will
| deform into the cracks and crevices.
| bityard wrote:
| You're totally right, it depends on the application. I was
| thinking of oil drain plug washers, which can be reheated
| and reused many times, basically until they are too thin to
| do the job.
| pengaru wrote:
| I usually just sand the washer surfaces flat on some high
| (600-800) grit wet-dry paper, never had a problem. Works
| on banjo bolt washers too.
| MisterTea wrote:
| My father was a metallurgical engineer though unfortunately
| passed away when I started high school. Recently after reading
| a story on melting iridium in an e-beam furnace I am now
| finding myself fascinated by metallurgy. One thing that
| interested me is the seemingly simple yet complex process of
| vacuum metallurgy where alloying and/or purifying is done in a
| vacuum using all sorts of exotic heating and handling methods.
| sitkack wrote:
| Not a metallurgist, but it really seems like zero-g alloys
| will give us some amazing materials.
|
| https://www.google.com/search?q=zero+gravity+alloy+site%253A.
| ..
| ttul wrote:
| How you know it is 2022: there is a YouTube channel dedicated to
| heatsink skiving.
| Cerium wrote:
| I had not seen a video before, but you can work out this
| production technique by close inspection of a heatsink. The fins
| are clearly bent up and have a root that is thicker on one side.
| dylan604 wrote:
| Given the audience, the numbers may be skewed, but how many
| people really look at a heatsink like that? Aren't most people
| just too damn excited to get the new system up and running, and
| just install as quickly as possible after unboxing?
|
| But now that you've mentioned it, I've stared at heatsinks a
| lot without once considering how it was actually made.
| [deleted]
| gumby wrote:
| Is this the origin of the term to skive off school? I don't
| really see the connection.
| GordonS wrote:
| I thought skiving was only a Scottish term - is it commonly
| used where you are too?
| gumby wrote:
| Growing up in Australia, yes, though unknown in the USA where
| I am at the moment,
| showerst wrote:
| Apparently not -- https://www.etymonline.com/word/skive
|
| Interesting etymology though, I love when you see a random PIE
| root show up in so many languages.
| _aavaa_ wrote:
| No matter how many times I look at the title, even after watching
| the video, I keep reading "Heatsink _Skydiving_ ".
|
| Was disappointed at the lack of skydiving, but skiving was cool
| too I guess.
| zython wrote:
| Me too I was at the edge of my seat waiting for the heatsink to
| be thrown out of a plane.
| traceroute66 wrote:
| > No matter how many times ... I keep reading "Heatsink
| Skydiving".
|
| I always do the same thing with "Homomorphic encryption", I
| keep reading Homophobic encryption and start wondering what
| cryptographers have against certain groups of people !
| mindprism wrote:
| Stop. Moving. THE CAMERA!
| CommieBobDole wrote:
| I like the part where the camera zooms in but isn't pointed at
| the spot where things are happening and then slowly pans until
| it's in frame.
|
| Honestly, looking at the video again, I'm sort of curious as to
| what exactly is going on with the camera; it seems handheld,
| but it's also moving in sync with the piece of equipment with
| the wedge/blade on it. Are they standing on a platform that's
| fixed to the other equipment?
| hundt wrote:
| I think the heatsink and platform it is on are moving
| horizontally and the blade only moves vertically.
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(page generated 2022-04-14 23:01 UTC)