[HN Gopher] Heatsink Skiving (2021) [video] ___________________________________________________________________ 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. ___________________________________________________________________ (page generated 2022-04-14 23:01 UTC)