[modeleng] Re: Model Engineers Laser Company

Itmay be that, Patrick.  One thing I have learned
about fooling around with metal is "don't be surprised
at anything unusual that happens!"

Al
--- Patrick Coppens-Marian Lynch <develop@xxxxxxxxx>
wrote:

> Al,
> Couldn't it be, that the oil, or whatever,the
> cooling liquid is, used to 
> submerge, the part that is cut, adds some carbon to
> the metal?
> I remember years ago, when the flirts EDM's came,
> that there were 
> similar troubles.
> The crew using the wire-fed EDM took weeks to sort
> out the correct 
> composition of the coolant. Only then could parts be
> put in the milling 
> machine /lathe with success, after being "sparked".
> Maybe something like that is going on with the laser
> cut parts...
> Patrick
> Allen Messer wrote:
> 
> >Makes sense to me.
> >
> >Al
> >--- Andrew Houston <andrew@xxxxxxxxxxxxxxxxx>
> wrote:
> >
> >  
> >
> >>Clif
> >>
> >>But surely, that can only happen if the steel is
> >>hi-carbon.
> >>
> >>Ordinary Mild Steel (MS) can't be hardened by
> >>heating/cooling(except by
> >>using case-hardening methods) and, I'm reasonably
> >>certain that a Laser can't
> >>add carbon to the MS which is required for
> >>case-hardening.
> >>
> >>Andy
> >>
> >>-----Original Message-----
> >>From: modeleng-bounce@xxxxxxxxxxxxx
> >>[mailto:modeleng-bounce@xxxxxxxxxxxxx]
> >>On Behalf Of Clif Walker
> >>Sent: 20 July 2007 19:53
> >>To: modeleng@xxxxxxxxxxxxx
> >>Subject: [modeleng] Re: Model Engineers Laser
> >>Company
> >>
> >>Hi All,
> >>
> >>The problem that you will find with Laser cut
> parts
> >>is that the edges are 
> >>effectively hardened.
> >>This means the if you have parts that need
> machining
> >>to clean up like con 
> >>rods,you have got the cut through the hard layer.
> >>
> >>Regards
> >>
> >>Clif
> >>----- Original Message ----- 
> >>
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> >>    
> >>
> >
> >
> >
> >     
>
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