[TheForge] Re: Burning Metal

Wed Nov 5 16:03:07 2003

        Thanks Chuck,  These are all things I haven't tried.  Does plasma
actually cut wood with that thin conductive material?  What a way to make a
patern for multiple cuts, if it does.  Seeing as I ain't tried this.......do
you need sheet metal on both sides of the item to keep the arc lite on the
plasma??  Very cool stuff to try.  What type materials do you cut for
example......plastics, wood, or rubber?  How is the smoke or is it so dam
hot and the stream pressure high enough it doesn't matter?
        Now you've got me off on another tangent to take me away from this
job I gotta get done........... :-(

Ralph

----- Original Message -----
From: "Chuck Robinson" <[email protected]>
To: <[email protected]>
Sent: Wednesday, November 05, 2003 1:53 PM
Subject: Re: [TheForge] Re: Burning Metal


> Hey Ralph,
> Use your ESAB 875  I.  it will cut thru the C/I like butter. Cut is almost
> as clean as one in steel.
> I also use mine to cut thru non conductive materials by wrapping it with
> thin steel sheet (1006-8) cut from old 55 gal drums.
> Chuck
> ----- Original Message -----
> From: "Ralph Sproul" <[email protected]>
> To: <[email protected]>
> Sent: Wednesday, November 05, 2003 6:37 AM
> Subject: Re: [TheForge] Re: Burning Metal
>
>
> > Thanks Pete, that gives me a base line to try it out on.  I have some
> broken
> > cast sections(legs and frames) with radiating fractures.  I'd like to
> remove
> > and put sawn in sections from cast plates I have.  This is an
interesting
> > solution.  I also have plasma and carbon arc torches to play with so it
> > should be a fun project testing all these out .....just after a rainy
day
> of
> > course down in the field where this all lays in wait.
> >
> > Ralph
> > ----- Original Message -----
> > From: "Peter Fels And Phoebe Palmer" <[email protected]>
> > To: <[email protected]>
> > Sent: Wednesday, November 05, 2003 12:18 AM
> > Subject: Re: [TheForge] Re: Burning Metal
> >
> >
> > >
> > >
> > > Hi Ralph:
> > > It depends on how much extra heat you need to sustain the cut, which
is
> > > to say, how thick the cast iron is. My recollection is using 1/2"
scrap
> > > to fuel  a cut in 3/4" cast iron and it was a ragged cut. Could be it
is
> > > more controllable with practice....Pete F
> > >
> > > Ralph Sproul wrote:
> > >
> > > >Hi Pete, That's an interesting idea - I've never tried that, but
would
> > like
> > > >to.  Do you use something light like 1/4" or does it take 1/2 to keep
> the
> > > >oxidizing stream going?
> > > >
> > > >Ralph
> > > >
> > > >----- Original Message -----
> > > >From: "Peter Fels And Phoebe Palmer" <[email protected]>
> > > >To: <[email protected]>
> > > >Sent: Monday, November 03, 2003 9:13 PM
> > > >Subject: Re: [TheForge] Re: Burning Metal
> > > >
> > > >
> > > >
> > > >
> > > >>One can use a sacrifice piece of steel to sustain a torch cut  in
cast
> > > >>iron..carbon isn't the critical factor..plain iron seems to be...PF
> > > >>
> > > >>Andy Gladish wrote:
> > > >>
> > > >>
> > > >>
> > > >>>>I think if the carbon content was the accelerating factor, cast
> > > >>>>iron should
> > > >>>>cut easily.
> > > >>>>The  best I can do on cast iron with an O/A torch is a very sloppy
> > cut.
> > > >>>>My plasma torch however cuts it easily.
> > > >>>>chuck-
> > > >>>>
> > > >>>>
> > > >>>>
> > > >>>>
> > > >>>I think that what is happening when I use an O/A torch to cut cast
> iron
> > > >>>
> > > >>>
> > > >is
> > > >
> > > >
> > > >>>that the preheat is melting the metal and the oxygen jet is blowing
> it
> > > >>>aside. Way different from the sharp, clean cut (burn) I get with
> steel
> > > >>>
> > > >>>
> > > >when
> > > >
> > > >
> > > >>>things are set up correctly.
> > > >>>So, a torch will 'cut' things that it can't 'burn'.
> > > >>>Andy G.
> > > >>>
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