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Old 10-14-2011, 08:57 PM #22
M98custom1212
 
 
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Originally Posted by BARB3R View Post
I would think roughing with an endmill, then finishing up with the edm would be just as quick on a production basis?? Depends on the precision required/cost though.
It all depends on the size of the hole, alot of the newer carbide drill you can feed at very high rates and insane amount sfm so it depends on if you would use a endmill and circle pocket to size or not. No edms you have to run very slow, much better methods to make a "square hole"
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Old 10-16-2011, 02:08 PM #23
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i run an edm machine at work, for production, it wouldn't be that practical at all. I can see this tool being used more as a finishing tool. Rough out with an endmill and use this thing to square up the corners... just like you can use a 1/4 EM to make a 3/4 hole, i don't see why you couldn't do the same with this, 1/4 square tool to make a 3/4 square.
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Old 10-17-2011, 10:00 AM #24
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as a machinist myself, I approve of this thread

also kwa, Ive never gotten the privilege of even being around and EDM, how quickly does it remove material?

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Originally Posted by Umami
I've always wondered how they do the hex key holes in stuff like bolt guides and other end-caps. Something similar? They can't just be pressed...
in a typical machine shop interior flats and keyways are done with broaching, which is a shaped cutter that is forced through the hole with a press
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Old 10-17-2011, 12:27 PM #25
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as a machinist myself, I approve of this thread

also kwa, Ive never gotten the privilege of even being around and EDM, how quickly does it remove material?
edm is NOT a quick process. but it is capable of doing stuff you can't do otherwise. wiki link: http://en.wikipedia.org/wiki/Electri...arge_machining
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Old 10-17-2011, 01:51 PM #26
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Im familiar with the process, just not how fast it is
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Old 10-17-2011, 02:26 PM #27
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From what I have seen, its not very quick; definitely not cost effective for production parts. Most of the things I have seen made from EDM is custom, 1-off parts that require crazy tolerances or have very small/complicated geometries.

Neat machines though. Just thinking that somewhere, some guys thought up that process kinda blows my mind. "Hey John, you know what would be cool? If we made a CNC machine that cuts metal with a teeny tiny wire, but the wire doesnt touch the material at all!" O_o
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Old 10-17-2011, 02:41 PM #28
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Ive actually designed a few marker firing engines with EDM in mind for certain parts

....in my perfect world where I have unlimited time and money to design and make my own production level paintball markers for my own enjoyment
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Old 10-17-2011, 03:52 PM #29
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Like anything material and thickness make all the difference. For example, we make this cooling plate out off " 304ss, 16" in dia with about 150 slots averaging 3" long and 0.055" wide. Takes 38 hours per plate.

On the other hand I can cut 6061 at 1/1.5 ipm... that's flying for edm.
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Old 10-17-2011, 06:08 PM #30
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Like anything material and thickness make all the difference. For example, we make this cooling plate out off " 304ss, 16" in dia with about 150 slots averaging 3" long and 0.055" wide. Takes 38 hours per plate.

On the other hand I can cut 6061 at 1/1.5 ipm... that's flying for edm.
do you guys do lights out machining?
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Old 10-17-2011, 07:02 PM #31
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I would assume they'd need to with run times like that, or the price per part is making up for it

or, they have lots of machines
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Old 10-17-2011, 07:24 PM #32
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In that type of application wire edm would probably not be used then. To create a square hole they would probably plunge edm them which would be alot faster. The only thing is the price of the electrodes are expensive as hell.
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Old 10-18-2011, 09:46 PM #33
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I hate you all. I click on this thread because it sounds interesting. Now its like sitting in my IET class all over again, sans fat sack of **** professor.
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Old 10-19-2011, 11:23 AM #34
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you can use a 1/4" endmill to cut a 3/4" hole. just sayin'.
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