English wheel/ wheeling raising machine

too me the top is the weak point if the base dosnt move hence the reason why its small then widens then comes down the column

if the top is too stronger and the base weaker then it will give more at the base

pressure between them both im not so sure once you feed metal inbetween them

 

This ofcourse is not a perfect representation no prizes for guessing that.

Gaz you will see higher forces at the spine.

I personally think torsion on the spine shown in the lower picture is a bigger challenge.




But wheels have existed in this form forever so we know it works.

 

Correct, torsional failure is what kills structures

 

Not trying to sound like an **** but look into second moment of inertia and free body diagrams @gaz1

 

To raise the lower anvil we used 4tpi acme which was quite aggressive 8tpi would be better. And to raise remove the work a round piece with a flat machined for lifting the anvil.

 

Yes , moving 1/4 per turn is too much

 

Going off PB's original drawing, there's a sharp transition from the curve at the top to the spine, I'm sure when it's cast there'll be a small fillet there but as it is in the drawing, I'd bet that's where it breaks, if it breaks, which I don't think it will.

 

And remember that’s just a template to cut out the birch ply backing that the pattern will be built up upon.
There will be blending and shaping and no stress raisers

 

Even if there was that such a huge chunk of cast seeing not masses of stress over all

 

Blanks to form foundry pattern for the 24” wheeling machine back from laser cutters

 

Mocking up one half of the foundry pattern

 

Cracking job