[TheForge] stubborn rivets

[CGRAF]

  Even more pertinent to Terry's post.
The size of the hole matters not a bit.
It is the size of the rivet plus any rust attached.

Heating the rivet expands it letting it cool lets it shrink back down.
  The expansion 1. would crush any rust. and 2 upset the rivet just a 
tag so that it would now be a micron or two smaller than the hole.

Mike Graf

On 8/10/2016 2:25 PM, Mike Spencer wrote:
>
> Bruce wrote:
>
>> Okay, guys, it's time for one of Einstein's "thought experiments":
>
> The Enlightenment led us to realize that thought, unsupported by
> observation, is much overrated.  :-)
>
>> Take a steel plate, maybe 1/2" x 3"x3".  SCRIBE a 1/2" circle in the
>> center of the flat so the circle will survive a little abuse.  Heat
>> the plate to below red.  Quickly measure the diameter of the circle.
>
> More relevant to Terry's original post:
>
>    Take a steel plate, maybe 1/2" thick but infinite in extent.  DRILL
>    a 1/2" HOLE all the way through somewhere. Heat the plate TO RED
>    only within, say, 3/4" of the hole.  Measure the diameter of the
>    hole.  Allow to cool.  Measure the diameter of the hole.
>
> Dave Smucker's post points in the right direction, same principle as
> straightening, say, a 20' piece of 4" diameter rod by spot-heating on
> the outside of the bend.
>
>> Does anyone think that the circle will have got smaller?  If so, please
>> justify your conclusion (or share whatever you've been smoking).
>
> Peretti's Park Square Mixture.  You're close enough, aren't you, to
> drive in to Park Square and get some from Peretti's yourself?   Doesn't
> have any pronounced psychocative effects but it's a good Latakia
> smoke.  Try Pride of Loch Lomond mixture if Park Square is too bland
> for you.
>
>
> - Mike
>