[TheForge] scrap plate steel

[Bob Smolen]

Bob,
Does the clamp go over the ends that meet  and "back" or over the other two
sides?
I believe the "other" sides.
Bob

----- Original Message ----- 
From: "Schade" <schade at acegroup.cc>
To: "Sponsored by ABANA" <theforge at mailman.qth.net>; <artgawk at thegrid.net>
Sent: Saturday, October 16, 2004 9:38 AM
Subject: Re: [TheForge] scrap plate steel


> You can tighten a loose collar the same way. Put a c clamp or
> vice grip tight on the collar. Heat to red. As the collar expands it
> upsets on itself. Quench with a wet rag or whatever. Do over
> if necessary.
>
> Bpb
> _______
>
>
>
> On Oct 16, 2004, at 12:26 AM, Peter Fels And Phoebe Palmer wrote:
>
> > I think the theory here is that one heats a limited area to dull red
> > and the surrounding plate prevents it from expanding, so it upsets
> > then  shrinks flatter  on cooling .
> >
> > The Millers wrote:
> >
> >> Actually it is kind of counter intuitive. You heat the convex side
> >> then "chill" it with water causing rapid contraction.
> >> The rapid contraction performs the "shrinking" effect like a
> >> shrinking hammer.
> >>
> >> You can't do it all at once.
> >>
> >> But I watched a guy straighten a 24" buck stay, (I beam used in large
> >> power plant boilers) that had a 12 " bend!!
> >>
> >> Ray
> >>
> >>
> >> The other model to consider is heating couplings to install on shafts
> >> or shrink fits.
> >>
> >> If you heat from the outside in the hole will get smaller. If you
> >> heat from the inside out it will get bigger.
> >>
> >> Ray
> >> Cincinnati
> >>
> >>
> >> On Friday, October 15, 2004, at 05:02 PM, Gladish Family wrote:
> >>
> >>>> In basic terms it was a matter of heating the opposite side and
> >>>> then cooling with water and shrinking the "dimple".
> >>>>
> >>>> Ray
> >>>> Cincinnati
> >>>
> >>> That sounds kind of fun...so, the heat goes in the concave side,
> >>> right?
> >>> Then (I'm guessing here) heat until it expands and becomes straight,
> >>> and
> >>> stop it in time...
> >>> Andy G.
> >>>
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