Heatsink skiving machine - GIF

[Altair]

Heatsink skiving machine.




Previously:

Aluminum heatsink manufacturing - GIF
Copper skiving machine - GIF
Power skiving internal gear - video

[Hoosiersmoker]

Can anyone explain this process and how the fins are all the same length when the available material is shorter and shorter as the process moves toward the edge of the material?

[Floradawg]

I see what you're saying. I don't know. It's a slow process. (unless the video is slowed down) Maybe that's why large heat sinks are pricey.

[Moldyjim]

I don't think it's starting to cut from the far end of the part. It looks like it is placed on the surface and digs in to start.
The block then could be however long they need.
It also looks like the fin length is shorter than the cut distance, material compaction making it shorter?
The lifting of the fin to straight seems like a good place to crack off a fin and scrap the part.

Obviously it works, wonder what material it is. Gotta be ductile and somewhat soft to cut like that.

[mlochala]

What's with the starburst reflection at the top of the machine?

[schuylergrace]

Can anyone explain this process and how the fins are all the same length when the available material is shorter and shorter as the process moves toward the edge of the material?

The skiving blade cuts downward as it moves toward the completed fins. So, the fins stay the same length because you are raising the same length of metal on that declined plane. Look closely, and you can see the angle on the side of the blank. Once they are done with the process, there's always a sort of triangular (from the side) piece of waste material that's cut off the end of the heat sink. To save on wasted material, the manufacturer may use long blanks and make multiple sinks by sawing apart the skived parts.

[marksbug]

yes the cuts are the same length... but I have no idea they were made like this.