re:Re: cast iron (stress relieving)

When I was younger, and worked in a machine shop, we spoke
of 'curing' cast iron with a 20 pound sledge. You know when your
done, when...
daylight is no more...

--- In CAD_CAM_EDM_DRO@y..., ballendo@y... wrote:
> Dave,
>
> This is good news!
>
> The vibrator you spoke of-- How did it compare with a vibratory
> tumbler (in magnitude of shake)?
>
> I used to use one for "settling" poured concrete tiles. Is this the
> type of thing you're talking about?
>
> Thank you in advance.
>
> Ballendo
>
> P.S. What about putting them(castings) in the back of an old pickup
> and driving over rough roads? What I'm really asking here is: How
do
> you know when you're "done"?
>
> > Thermal cycling, mechanical vibration, etc all will work, if you
> > move enough distance to slip the stresses out<snip>
>
> > The shop I used to work at had a rig with a vibrator that shook
it
> > and relieved most of the stresses in one night.
> > The cheapest way I know to relieve stresses is to put the casting
> > on a resilient support (inner tubes or springs) and pound it all
> > over with a hammer.
> > Dave.