On Mon, 13 Feb 2012 22:09:47 +0200 Roland Jollivet <[email protected]> wrote:
> On 13 February 2012 21:38, gene heskett <[email protected]> wrote: > > > On Monday, February 13, 2012 02:24:49 PM Roland Jollivet did opine: > > > > > ..snip > > > > > > I would imagine... that the oxide layer is way way thinner than a > > > micron in thickness, and while tough as you say, in climb milling > > > the cutter tip will hit the metal and with the eggshell effect, > > > simply push past the oxide layer. ><snip> Taken directly from the OSG 2-3 flute carbide end mill section. dia rpm feed (ipm) .015 100000 7.1 .020 62000 7.9 0.03 40000 7.9 0.0625 21200 7.9 5/64 16000 11.8 depth < 1/32 .25D 1/32 -> 5/64 0.5D scaling those spindle speeds gives more like .8 ipm and 0.03" depth/pass. FWIW: Boeing uses copious amounts of emulsifiable oil in cutting Al. Think fire hose type flows for a wing spar. I did find a Russian video using alcohol for cooling. However, if it flashes then you're toast. Alcohol also burns with a almost colorless flame. Looking at heat of vaporization: material J/g water 2257 methanol 1100 ethanol 846 propanol 779 Of course you have to boil it off to get that removal of heat. Ventilation for the organics would be more than just advisable. It looks much safer to stay with emulsifiable oil. Keep kicking at it, you'll get there. Dave > ------------------------------------------------------------------------------ > Try before you buy = See our experts in action! > The most comprehensive online learning library for Microsoft > developers is just $99.99! Visual Studio, SharePoint, SQL - plus > HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when > you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
