CAD CAM EDM DRO - Yahoo Group Archive

Re: [CAD_CAM_EDM_DRO] orange peel on aluminum

Posted by Tom Eldredge
on 2001-04-24 06:23:38 UTC
Thanks, Jon for taking the time to explain this for me.

Tom Eldredge

----- Original Message -----
From: Jon Anderson <janders@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Sunday, April 22, 2001 1:20 PM
Subject: Re: [CAD_CAM_EDM_DRO] orange peel on aluminum


> Tom,
>
> Ideally you want both available. Sometimes you need cooling more than
> lubricating, and the water-based are better at that, plus you can get
> more air volume which can help evacuate chips. Case would be some parts
> I machined with a .165 wide slot along the edge of a .350 thick plate,
> 1.4" deep from the edge. The micro-lube did a better job of lubricating,
> but at a mere 20 psi, wasn't clearing the chips well enough. Also, if
> the aluminum got too hot, it would spread apart, opening the slot and
> required a lot of hand labor to squeeze them back in to tolerance.
>
> Regarding orange peel, I just ran into this last night. Had to flycut a
> 3.5 x 11.5 x 5/8 Al plate. Frankly, I had to hang a tool out way too
> far, and sure enough I got orange peel on the finish. This particular
> tool had a small corner radius. While this might generally help the
> finish, it also increases the length of cutting edge engaged with the
> material, which increases cutting forces, which will move a tool hung
> out too far. I put a dead sharp corner on the bit (though at a 45 deg
> angle to the part surface) and ran at 3000rpm and a fairly low feed
> rate. Wonderful finish. BTW, used the SafeTap stick for lube, final pass
> was .002 DOC, wiped the lube stick down the length of the part three
> places.
> Tool corner radius will improve finish only in a rigid setup. If things
> are marginal, sharp is better but you have to slow the feed to keep the
> finished surface smooth.
> And tools must be dead-sharp. I used to think I was pretty good at hand
> honing tools until I looked at one under a microscope. Yikes!
> I coughed up the bucks recently for a Baldor carbide grinder and it's
> one of the best investments in my shop. Lacking this, one would do well
> to consider making something along the lines of one of the knife
> sharpeners that holds the blade/stone at a fixed angle. All it takes is
> ONE slightly off pass with a hone, and you've ruined the edge for really
> fine work.
>
> Jon A.
>
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Discussion Thread

george@f... 2001-04-20 12:11:39 UTC orange peel on aluminum Smoke 2001-04-20 12:49:52 UTC Re: [CAD_CAM_EDM_DRO] orange peel on aluminum Rich D. 2001-04-20 12:51:26 UTC Re: [CAD_CAM_EDM_DRO] orange peel on aluminum Jon Elson 2001-04-20 14:08:50 UTC Re: [CAD_CAM_EDM_DRO] orange peel on aluminum Jon Anderson 2001-04-20 15:38:52 UTC Re: [CAD_CAM_EDM_DRO] orange peel on aluminum Jon Elson 2001-04-20 16:20:00 UTC Re: [CAD_CAM_EDM_DRO] orange peel on aluminum Jon Elson 2001-04-20 16:22:01 UTC Re: [CAD_CAM_EDM_DRO] orange peel on aluminum Smoke 2001-04-20 16:47:14 UTC Re: [CAD_CAM_EDM_DRO] orange peel on aluminum Jon Anderson 2001-04-20 16:59:13 UTC Re: [CAD_CAM_EDM_DRO] orange peel on aluminum Sven Peter, TAD S.A. 2001-04-20 17:10:01 UTC Re: [CAD_CAM_EDM_DRO] orange peel on aluminum dougrasmussen@c... 2001-04-20 17:51:04 UTC Re: orange peel on aluminum Donald Brock 2001-04-20 22:48:50 UTC Re: orange peel on aluminum Tim Goldstein 2001-04-20 23:14:03 UTC Detailed wiring diagram for Gecko G3X0 drives ballendo@y... 2001-04-21 02:37:56 UTC Re: orange peel on aluminum wanliker@a... 2001-04-21 07:37:53 UTC Re: [CAD_CAM_EDM_DRO] Detailed wiring diagram for Gecko G3X0 drives Tim Goldstein 2001-04-21 08:57:56 UTC RE: [CAD_CAM_EDM_DRO] Detailed wiring diagram for Gecko G3X0 drives Donald Brock 2001-04-21 15:55:25 UTC Re: Detailed wiring diagram for Gecko G3X0 drives/MY thanks. Tom Eldredge 2001-04-22 08:58:45 UTC Re: [CAD_CAM_EDM_DRO] orange peel on aluminum Jon Anderson 2001-04-22 11:21:29 UTC Re: [CAD_CAM_EDM_DRO] orange peel on aluminum Jon Elson 2001-04-22 21:12:38 UTC Re: [CAD_CAM_EDM_DRO] orange peel on aluminum Alan Marconett KM6VV 2001-04-22 21:37:27 UTC Re: [CAD_CAM_EDM_DRO] Detailed wiring diagram for Gecko G3X0 drives ballendo@y... 2001-04-23 06:28:07 UTC Re: orange peel on aluminum Bill Griffin 2001-04-23 09:14:54 UTC Mister system was Re: orange peel on aluminum Doug Harrison 2001-04-23 15:37:03 UTC Re: [CAD_CAM_EDM_DRO] Re: Detailed wiring diagram for Gecko G3X0 drives/MY thanks. Tom Eldredge 2001-04-24 06:23:38 UTC Re: [CAD_CAM_EDM_DRO] orange peel on aluminum