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  1. #1
    ACE323 is offline Cast Iron
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    Mar 2005
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    I decided to put together a spreadsheet for an employee that has no experience programming milling machines.It consists of a page of recommended speeds and feeds which will be entered into cells.

    User enters:
    SFM
    IPT
    ENDMILL DIA.
    # OF FLUTES

    Program returns the following 4 values into 4 different operation blocks(facemilling,slotmilling,contouring,and pocketing):
    RPM
    FEEDRATE(IPM)
    AXIAL DOC
    RADIAL DOC

    RPM andFEEDRATE will be the same for all 4 ops.

    I've done extensive searches on the web and the problem I'm having is that everywhere I look, someone has a totally different recommended DOC from the other guy.1.5 x EM dia., .25 x EM dia.,ETC
    What I'm looking for is a tried-and-true set of values for AXIAL DOC and RADIAL DOC for the 4 basic milling ops:
    Facemilling
    Contour milling
    Pocketing
    Slotting

    We always use carbide and use 4-flutes 99% of the time.Unfortunately, I never went to school for machining and haven't kept very good notes.

    Thank You

    Ace

  2. #2
    Calzone's Avatar
    Calzone is offline Hot Rolled
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    Southeast Kansas
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    I would think you'd need a new spreadsheet for each type of material your going to be working with. The DOC in stainless is less than in aluminum for example. You also would have to figure in the rigidity of your setup. I also tend to be more gentle on the smaller dia. cutters vs their beefier counterparts.

    I think there is a program already available from a board member that will help you out. I can't recall the name, but I'm sure someone else will know it.

  3. #3
    Tumbleweed Tim is offline Stainless
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    Ramona, Ca. USA
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    Buy ME-PRO from M Rainy a PM board member and it will be a wise $100 or so investment. He has done all the foot work.

  4. #4
    ACE323 is offline Cast Iron
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    ME-Pro doesn't give any reccomendations on DOC

  5. #5
    ChampionP is offline Cast Iron
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    Dec 2005
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    Ogden, Utah
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    tell him 10% doc for steels this will usually allow everything up to and including full width of cut in my experience. with a lot of room to go deeper after he gets more comfortable with taking a cut. 20% for aluminium. Hopefully he will be a little braver after a few weeks and increase the doc for better run times and tool life.

  6. #6
    Calzone's Avatar
    Calzone is offline Hot Rolled
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    Just keep in mind there is no tried and true way to machine. If that were the case everyone would work under the exact same set of rules, and each machine would come with a sticker on the door. It varies from shop to shop, and programming attack methods. I'd go conservative at first at around 25% x dia. for endmills and .050 for facing until the limits of the setup and machine can be evaluated.

  7. #7
    ACE323 is offline Cast Iron
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    Thanks guys,

    Sounds good to me


    Ace

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