[TheForge] scrap plate steel

[Randy Crawford]

I can agree the heat and shrink trick works, we spent the whole day heating
and cooling schedule 40 pipe to fit a spiral staircase.

Randy

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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