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IndustryArena Forum > MetalWorking > MetalWork Discussion > Interrupted turning in aluminum
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  1. #1
    Join Date
    Nov 2017
    Posts
    591

    Interrupted turning in aluminum

    I'm looking at possible ways of processing an aluminum part in the mill turn and there's one possibility that would work out very conveniently, but would involve interrupted turning. Basically a 1 inch square shape that is turned to 1.25 diameter to remove corners of the square shape. A bit more complicated than that, but that's basically what needs to happen. I know that carbide inserts don't like interrupted cutting, but not sure how it handles aluminum specifically. Will the usual ground and polished aluminum specific insert be able to handle this? Or will it most likely chip? I can do it the other way around, turning then milling, but there's some big advantages of doing it this way if possible.

  2. #2
    Join Date
    Jan 2005
    Posts
    15362

    Re: Interrupted turning in aluminum

    Quote Originally Posted by QuinnSjoblom View Post
    I'm looking at possible ways of processing an aluminum part in the mill turn and there's one possibility that would work out very conveniently, but would involve interrupted turning. Basically a 1 inch square shape that is turned to 1.25 diameter to remove corners of the square shape. A bit more complicated than that, but that's basically what needs to happen. I know that carbide inserts don't like interrupted cutting, but not sure how it handles aluminum specifically. Will the usual ground and polished aluminum specific insert be able to handle this? Or will it most likely chip? I can do it the other way around, turning then milling, but there's some big advantages of doing it this way if possible.
    If you are using good tooling / the carbide inserts won't be bothered by the interrupted cutting, in aluminum .100 depth of cut would not be a problem if you have enough power for that depth of cut
    Mactec54

  3. #3
    Join Date
    Dec 2013
    Posts
    5717

    Re: Interrupted turning in aluminum

    You won't have a problem. The inserts will live just fine. I make the 304 SS part below that gets a slot milled in it, then turned. The inserts are good for about 60 parts before I change them, that's when I gain about 0.001 on the OD from tool wear. In aluminum the inserts will last forever.

    Order of operation on this part is Face, Drill, Slot, Chamfer, Turn, Part off

    Jim Dawson
    Sandy, Oregon, USA

  4. #4
    Join Date
    Nov 2017
    Posts
    591

    Re: Interrupted turning in aluminum

    Sounds good, I'll give a shot. It works out well for setup order reasons, but an added bonus is the automatic chip breaking which is a nice bonus in aluminum

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