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IndustryArena Forum > CAM Software > Mastercam > unrolling a circle
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  1. #1
    Join Date
    Mar 2008

    Question unrolling a circle

    hello everyone
    I am trying to see if mastercam can do this?
    so I have a 10 inch O.D with a wall thickness of .250 so I.D is 9.5 inches
    I am trying to see if I can unroll it (lay it flat) just trying to see how long of pcs of sheetmetal I have to cut?
    hope that made some kind of sence? basically just trying to unroll a circle flat .

    thank you

  2. #2
    Community Moderator ger21's Avatar
    Join Date
    Mar 2003

    Re: unrolling a circle

    2 x pi x radius

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    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)

  3. #3
    Join Date
    Dec 2003

    Re: unrolling a circle

    You might need to visit a sheet metal forum for advice on where the neutral axis of a rolled cylinder is likely to be if the accuracy is really important. Its also going to take some fairly serious rollers to persuade 1/4 inch steel to assume the curve.

  4. #4
    Flies Fast
    Join Date
    Dec 2008

    Re: unrolling a circle

    It's a bit more awkward than that
    .... if rolling or bumping a sheet, the OD stretches & ID compresses...
    roughly speaking, the mean sheet thickness is calculated for the bend

    ... so ... 9.75 x pi = 30.63" would be the cut length

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