[TheForge] Re: engineering question

[gblacksmith]

Folks:  Don't you just hate it when this happens!  When one corner goes thin 
its tough to fix.  This thinness is more an issue than the shape, as pointed 
out.  I try to use a ratio of one at least half of the original thickness, 
per side.  One half through one half leaves little room for error and 
usually requires first a small punch then a finish-size drift, with the 
assembly blocked with the drift in place, at a low red heat, sometimes with 
a set hammer used gingerly.  I'd like to know what you folks are doing, 
because my method is VERY labor intensive  Grant

----- Original Message ----- 
From: "Mike Spencer" <mspencer at tallships.ca>
To: <theforge at mailman.qth.net>
Sent: Sunday, October 03, 2004 10:55 AM
Subject: [TheForge] Re: engineering question


>
>
> Walter opined:
>
>> When you look at the forces as they flow trough the
>> object, the square would show less stress.
>
> And I would say just the opposite.  But that's guesswork.  I suspect I
> guess that because the first thing I ever made using the technique was
> 1/2" sq. through 1/2" sq. and I found it was hard and frustrating
> trying to avoid making too-thin or stress-cracked weak spots in the
> eyes at the inside corners, e.g....
>
>             ....here:
>                  /
>                 /
>                /
>      |      | /                   |    |
>     /  _____ \                   /  /\  \
>    /  |    |  \                 /  /  \  \
>    |  |    |   |               |  <    >  |
>    \  |____|  /                 \  \  /  /
>     \        /                   \  \/  /
>      |      |                     |    |
>
>
> Or more like....here:
>                 /
>                /
>      |      | /
>     -+ _____+-
>    |  |    |  |
>    |  |    |  |
>    |  |____|  |
>     -+      +-
>      |      |
>
> where the '+' representiong the inside corner in the outer bar comes
> really close to the corner of the eye.  The diamond opening reduces
> the risk of that weakness because the eye is opened to a gentler angle
> at the problem point.
>
>
> In retrospect, 1/2" sq. may just have been too small a cross section
> for the technique combined with my skill level at the time.
>
> - Mike
>
> -- 
> Michael Spencer                  Nova Scotia, Canada       .~.
>                                                           /V\
> mspencer at tallships.ca                                     /( )\
> http://home.tallships.ca/mspencer/                        ^^-^^
>
> -- 
>
>
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