Hi Gianni,
EDM=Electrical Discharge Machining. I'm no expert on it other than
what I've read.
Essentially, the metal is removed by a repetitive electrical
discharge. Do a google search. In brief, there are a couple of
forms. A sinker technique which simply sinks a hole through - can be
done with a shaped electrode for shaped holes. Then there's a wire
technique which is more like an EDM variation of a bandsaw or scroll
saw only with wire fed from a feed spool to a takeup spool via the
job. Same principle though. Mostly these are expensive CNC machines
and can do pretty exotic stuff. But I've seen DIY articles on the
web if you want to have a play. Otherwise, look for a firm offering
this service.
I suspect it's more suited to small quantities rather than mass
production. It doesn't do dozens of holes per minute. More like
dozens of minutes per hole! It has other neat uses too like
accurately eroding small broken taps. Hardness of the metal is a non-
issue. Anyway, do a google and check for local services.
John
--- In 7x12minilathe@..., <gianni.carbone@...> wrote:
Hi John
It is a plate about ?" thick (6 mm) the hole must be between ? and
5/16 in
diameter.
What is an EDM equipment?
Gianni
_____
Da: 7x12minilathe@...
[mailto:7x12minilathe@...] Per
conto di born4something
Inviato: luned¨¬ 5 marzo 2007 12.47
A: 7x12minilathe@...
Oggetto: [7x12minilathe] Re: Drilling HSS 10% cobalt blank
Hi Gianni,
That stuff's hard. What diameter and how deep? Any access to EDM
equipment?
John
--- In 7x12minilathe@ <mailto:7x12minilathe%40yahoogroups.com>
yahoogroups.com, <gianni.carbone@> wrote:
Hi folks
Does anybody know how to drill holes in a HSS 10% cobalt blanks?
Gianni
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