6″ Vertical Boiler Smoke Box Cover
Today I made the smoke box cover for the vertical boiler.
I decided to try a different method for making the 20 degree conical shape. Previously I have beaten or tapped or hammered the shape. This time I decided to press the annealed 3mm thick copper into the desired shape. It worked!
I needed a 20 degree conical shape. For various reasons I decided to use 3mm thick copper.
So firstly I turned a male and female form in hardwood.
Then I cut out a circle of 3mm thick copper plate.
Then I pressed the shape between the forms in my 20 tonne hydraulic press.
It worked perfectly! In one go. But the flange still needed beating with a hammer, after multiple annealings.
Well done John…quite a short cut.
I’m interested that one lot of annealing was enough for the corner of the flange.
A hand shaped male / female plug for an irregular locomotive boiler may work too
One annealing for the dome pressing, but then 4-5 more for hammering the flange itself. John
Oh I see. Got a bit excited there. Still it’s good progress.