[TheForge] Re: Burning Metal

Wed Nov 5 18:52:00 2003

Works on mirror too, the reflective layer conducts, silver or tin or
something isnt it?

----- Original Message -----
From: "Ralph Sproul" <[email protected]>
To: <[email protected]>
Sent: Thursday, November 06, 2003 7:37 AM
Subject: Re: [TheForge] Re: Burning Metal

>         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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