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  1. #1
    Join Date
    Oct 2018
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    Chandler, AZ
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    Default Machined souvenirs - Turner's Cubes and Balls

    Hello everyone! My name is Ivan. I'm new to this forum, but metalworking is my hobby for the last 12 years.
    I've built CNC Lathe recently and make these metal puzzles that every chipmaker knows.
    2.5" - 63mm ball, seven levels totally

    b2p5_1.jpgb2p5_2.jpgb2p5_3.jpgb2p5_5.jpgb2p5_6.jpg


  2. #2
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    Oct 2018
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    Default

    2" - 50mm, six levels
    CSC_3779.jpgCSC_3783.jpgCSC_3784.jpg


  3. #3
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    Oct 2018
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    Default

    1-1/4" - 31mm, four levels

    CSC_3663.jpgCSC_3662.jpgB1_3.jpg


  4. #4
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    Oct 2018
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    Chandler, AZ
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    Default

    "Swiss cheese" cube, 50mm
    SCH1.jpgSCH2.jpg


  5. #5
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    Oct 2018
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    Chandler, AZ
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    Default

    2" cube, 6 levels
    Cube5_1.jpg


  6. #6
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    Oct 2018
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    Chandler, AZ
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  7. #7
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    Default

    1" - 25mm cubes, four levels
    C1_1.jpg


  8. #8
    Join Date
    Jul 2016
    Location
    Melbourne
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    35
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    Default

    They are some pretty good surface finishes, how much finishing work are you having to do? And how are you deburring all those complex inner surfaces?

    Very impressive

  9. #9
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    Oct 2018
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    Chandler, AZ
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    Default

    Quote Originally Posted by caskwarrior View Post
    They are some pretty good surface finishes, how much finishing work are you having to do? And how are you deburring all those complex inner surfaces?

    Very impressive
    Nice to see that at least one person noticed finishing done! Thanks!
    Deburring and finishing is a real challenge. Since I tried to minimize manual work I experimented with my ball mill a lot.
    DSC_0684.JPG
    First, I run it with no media for 30min - 2hours with just the balls inside at quite high speed. The balls spin inside, all internal figures have multiple collisions. The burrs are being removed during this procedure.
    Second, I run it for ~ 1 hour with dry polishing powder at low speed. This step removes aluminum chips, dust, grease, and slightly polishes the inside surfaces.
    The cubes are not spinning easily . So I remove burrs from external cubes manually. Thanks God, the cube has just 12 ribs! Dry polishing works fine for cubes.

  10. #10
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    Oct 2018
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    Chandler, AZ
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    Default

    Quote Originally Posted by r3292c View Post
    Nice to see that at least one person noticed finishing done! Thanks!
    I experimented with my ball mill a lot..
    The drum can be also driven by a lathe. Especially if you use VFD for controlling RPMs. I adjust RPMs of the drum listening to the sounds it generates.

  11. #11
    Join Date
    Nov 2007
    Location
    melbourne australia
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    Default

    I like the idea of driving a tumbler in the lathe. Can you please provide some info on the polishing powder you use?
    Chris

  12. #12
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    Default

    I'd be really careful using a tumbler in the lathe, because if the lid came off microscopic grit will kill your machine and embed all over the joint.

  13. #13
    Join Date
    Nov 2007
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    melbourne australia
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    Default

    Good point. The lid on the one in the pic looks pretty secure. A plastic drop sheet would be good insurance. My main worry would be the motor overheating due to lack of cooling air for hours at a time.
    Chris

  14. #14
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    Oct 2018
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    Chandler, AZ
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    Default

    Quote Originally Posted by jack620 View Post
    I like the idea of driving a tumbler in the lathe. Can you please provide some info on the polishing powder you use?
    Quote Originally Posted by caskwarrior View Post
    I'd be really careful using a tumbler in the lathe, because if the lid came off microscopic grit will kill your machine and embed all over the joint.
    The polishing powder is "Walnut/Corn Cob Tumbler Media", I don't think it has any abrasive grit.

  15. #15
    Join Date
    Apr 2013
    Location
    Toowoomba Qld
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    401

    Default

    Either some really good photography or some nice looking parts !

    Would make awesome desk toys for the office, are you making them to sell or just to show off to your friends / family ?

    Checking out the other clips on your youtube channel looks like you have had a few issues with birds nesting when at least doing the rough turning. Have you played around much with speeds & feeds and depth of cut to see if you can engage the chip breaker on the insert ? (or tried different chip breakers?)

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