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Rifles, Bullets, Barrels & Ballistics Applied Ballistics



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Unread 10-12-2003, 09:11 PM
Bronze Member
Join Date: Jan 2002
Location: North Idaho
Posts: 66
Re: titanium

I think that a "sinker" EDM would be a good choice for cutting the cam surface on lug abutments. The problem now becomes machining the electrode but that would be simple on a 4th axis VMC. A friend has a VMC with 4th axis and is hinting that I need to buy an older ram (sinker) EDM.
I think the process that makes pistol barrels is called "ECM" for some form of electro-chemical machining. A company that does this was setup at the SHOT Show in '98.
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Unread 10-12-2003, 09:52 PM
Gold Member
Join Date: Sep 2003
Location: Nebraska
Posts: 810
Re: titanium


I'm not sure if the EDM can cut the abutments as Brent wants, they have to twist as the relief goes into the action (like. I sent him a email about the process that Jay McMumm used to cut his. If he needs some pics I think Jay will oblige.

"Let the good times roll"
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Unread 10-14-2003, 08:08 AM
Posts: n/a
Re: titanium

Sinker/Ram style EDMing will work. However this type of machining leaves a rather large haz area as it runs hotter than wire edming. If you do machine it the haz area will need to be chemically removed as it will be a high stress area.
I'm woring on getting a sinker style edm but it wont be any time soon so all of you who are hopping stick with me maybe one day I'll have it lol [img]images/icons/smile.gif[/img].
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