Re: [CAD_CAM_EDM_DRO] orange peel on aluminum

Jon,

I recall some posts regarding flood/mister comparrison. I prefer not to
discuss the environmental concerns of each, unless you think they are an
important concern for a normally healthy person, but I would like one of you
to comment on the relative benifits of one method over the other in light
machining of aluminum. I am interested in a quality finish. I am familiar
with the problem of metal deposits on the tool in machining aluminum causing
poor finish results. Part of my concern is the mess caused by one method
over the other. It seems that the mister would produce much less mess to
deal with when machining large parts.

Tom E.

----- Original Message -----
From: Jon Elson <jmelson@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Friday, April 20, 2001 6:19 PM
Subject: Re: [CAD_CAM_EDM_DRO] orange peel on aluminum


>
>
> Jon Anderson wrote:
>
> > Smoke wrote:
> > >
> > > I'd say the biggest culprits to look for would be toll vibration and
> > > dull tools.
> >
> > I'll second this one. Aluminium build up on the tool causes smearing and
> > tearing, and can leave little bits of aluminum welded to the plate by
> > the trailing edge.
>
> Keeping the aluminum cool is very important. When it heats up, even
> a little, it gets softer, and the tendency to melt on the tool increases
> dramatically. I use flood coolant on many aluminum machining
> operations to keep the workpiece cool, and prevent this kind of mess.
> Flycutting generally doesn't cause that much heating of the work, but
> the tool gets pretty hot.
>
> Jon
>
>
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