[TheForge] Rivets & heat

[Dave Mudge]

In old school mechanics, we sometimes had to remove (and replace with a new
one) the ring gear on the flywheel.
That big round disk thing on the back of a car engine. One would heat it
evenly all around. (The ring gear not the flywheel) It expanded.
When it was hot enough one taps it with a hammer and it falls off. The new
ring gear was heated on a flat bench in a similar fashion.
It expanded. When it became hot enough (and large enough) it would be
carefully placed on the flywheel and allowed to cool.
As it cooled down it of course shrank onto the flywheel where it held fast
ever after...
I assume that you have all seen the video of a crew fitting a steel "tire"
to a wooden wagon wheel.

dave m

On Fri, Aug 12, 2016 at 9:18 PM, Steve Bloom <sabloom at ironflower.com> wrote:

> On 8/12/2016 4:11 PM, Mike Spencer wrote:
>   Steve Bloom <sabloom at ironflower.com> wrote:
>       If you need a definitive answer from the world of experimental
> "science", check out:
>
>       www.ironflower.com/tips/rivet & heat experiment.jpg
>
>> Excellent!  The Enlightenment was not altogether in vain.
>>
>> I'll just go and do that myself.  But not today, as we're in the middle
>> of a record hot spell and today the humidity is 100% -- yes, tangible
>> water in the all too warm air.
>>
> I'm in north Florida -- effective heat/humidity was ~ 105 F and I was
> installing a ceiling...and...dripping
>
> as for some followup comments - the rings compensate for piston
> "expanding". Just do the experiment..don't trust me <grin>. And for heat
> clenching - the idea is to undersize the hole, heat it, then slip it over
> the object.  If interested - do a google search on how the 16" guns where
> processed for the Iowa class battleships (see
> http://dtic.mil/dtic/tr/fulltext/u2/a183947.pdf)
>
> Steve
>
>
>>
> ______________________________________________________________
> TheForge mailing list
> Home: http://mailman.qth.net/mailman/listinfo/theforge
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:TheForge at mailman.qth.net
>
> TheForge mail list group photo site is
> http://www.shutterfly.com
> Login: blacksmithblacksmith at hotmail.com
> Password: anvil
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to davemudge1 at gmail.com
>



-- 
...sometimes you're the windshield,
...sometimes you're the bug