Metal Skiving Machine
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gfycat.comPosted Feb 22, 2019, 11:55 AM UTC
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gfycat.comThat’s a smooth loop
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Isn't it though? And so satisfying to watch. I spent far longer than I should watching it. I love manufacturing videos.
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I spent the recommended amount of time watching it, and honestly I feel I could have gone a little longer. There's something exciting about bending the rules... I might just throw on a leather jacket and give this gif a few more repetitions, what the h*ck!
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Thanks! I spent whole 15 minutes of my employer's time trying to get it as smooth as possible :D
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thermaltake used to do a raw copper skived heatsink for Socket A amd chips, thing was super nice, always wondered how the actual shaving worked.
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It looks like it's working pretty hard to me
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Hah, I read 'Metal Skydiving Machine'. I was so eager to see what that was.
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Me too, I was so confused for a moment.
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Now, that I want to see :D
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I could watch it for hours
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I only noticed it was a 1 second loop after like a full minute of watching this machine go.
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A metal skiving machine. I always wondered how this kind of heatsinks gets made, as you can see the little bend at the bottom of each fin.
It's really ingenious and also seems like you could make an almost unlimited length of heatsink.
EDIT: After close scrutiny ^^(see ^^comments ^^below) , the image I originally linked as a skived heatsink was decided to not actually be skived. The new actually-skived heatsink pictures courtesy of u/Kalafok, thanks!
The copper fins in the linked picture do not appear to be made with this technique. They appear to be soldered on to a flat plate. If not solder, then some other attachment method.
Not sure why you were downvoted, because that heatsink is definitely not skived. Looks more like spot welding than soldering, though.
I doubt it would be spot welded, since the aim here is to get as good a thermal transfer as possible. You might get similar thermal transfer through the spotwelds as through plain metal, but the rest of the fin would probably be just touching the base, resulting in worse performance (I think). I assume you'd only do a few spotwelds along the length of the fin.
Seems to me that skiving would be the more efficient choice compared to storing, manipulating, shaping and welding a thin sheet of metal anyway.
As I said in my reply to u/cbarry12, I still think the heatsink in the image is skived, but I can't be sure :)
I didn't down vote. At least not intentionally. I'll check and fix if I did. Edit: I checked and definitely did not down vote. The video is pretty cool. I had never seen how they were made so I learned something. I simply pointed out that the copper one in the linked picture didn't appear to be made using the same method. New edit: Duh. Nevermind. I misread your post. I'm moving along now...
I think it is a skived heatsink but can't be sure, because not enough pixels :) It was hard to find a large enough picture with a good angle and without a random eBay seller's logo plastered over it.
It's relatively safe to assume that a low profile heatsink with vertical fins from the same material as the base without visible heatpipes is skived, I'd say. I feel fairly safe in that assumption, mainly because out of the maybe 30 server CPU heatsinks that I've seen in person, ~25 were skived and the rest were of significantly different design. Mainly spiral machined fins with a fan mounted on top. (These skived ones usually don't have fans attached and rely on the chassis fans to provide airflow)
Also, for the record, I didn't downvote you either :)
I got curious and went to investigate.
Found a server heatsink in my pile of junk, and it turns out to be a skived one! https://imgur.com/a/B477RAJ
The heatsink you linked has stamped fins. There are 2 kinds of fins on that one, the 2x ones and the long 4x ones in the middle. They're really shallow and wide C channel kinda deals, with one side having standoffs for more better rigidity and the other side being a fill width lip deal.
I'm not sure spot welding can be ruled out, copper cold welds quite readily so maybe a few spot welds is enough to make a pretty solid connection across the entire lip.
(pinging u/cbarry12)
Interesting, I didn't think of the fins being stamped - that would make a lot of sense for heatsinks where there are the reinforcing "strips" at the top. I just assumed those were somehow formed after skiving.
At first I imagined there being a roll of copper "tape" that would get cut and fastened to the base, but with stamping you could both create the shape and do most of the bending in one operation, which makes much more sense.
In your album, I also see how the fins are not actually straight and vertical, but in my linked image they are, which leads me to change my mind and say you were all right and I was talking out my arse a little bit :D I'll link to your album in my root comment as an example of a skived heatsink, if you don't mind.
I'm still curious about how the fins are attached to the base in my linked image. I checked my photos and found that my C6100 has heatsinks with the top reinforcements and straight fins. I assumed they were skived and didn't pay too close attention to them, but I'll take one out and examine it closely when I'm in the vicinity of the machine on Sunday. Should be interesting. I'm still betting against spotwelding, but we shall find out :D
Skiving machine
Skiving or scarfing machines cut material off in slices, usually metal, but also leather or laminates. The process is used instead of rolling the material to shape when the material must not be work hardened, or must not shed minute slivers of metal later which is common in cold rolling processes.
The skiving process, meaning "to slice", can be applied to a variety of applications and materials. In leather, skiving knives trim the thickness of the leather, often around the edges, to thin the material and make it easier to work with.
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Is that a Copper heatsink?
In the linked picture, yes. They're often used in servers for their low profile.
In the GIF, I don't think that's copper, but it's still a heatsink.