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Allan Waterfall
08-30-2004, 01:38 PM
Made these rolls for bending sheet metal.I needed to bend the tyres for my"Minnie" traction engine.

I'm pleased with the resulting bends,no flat spots on the end.

End view
http://img.photobucket.com/albums/v214/Greenlathe/Bending%20rolls/Rolls1.jpg

From above
http://img.photobucket.com/albums/v214/Greenlathe/Bending%20rolls/Rolls2.jpg

Trial fit
http://img.photobucket.com/albums/v214/Greenlathe/Bending%20rolls/Trialfit.jpg

Allan

nheng
08-30-2004, 01:48 PM
You Brits are so damned good http://bbs.homeshopmachinist.net//smile.gif Never thought about building my own but that looks great!

Now for one dumb question. Is the radius of the bend controlled solely by the "idler" roller?

Den

Allan Waterfall
08-30-2004, 01:57 PM
Den,

If you mean the smaller one at the front I think so,as I move it up it tightens the radius.

The rollers are supposed to be in bronze bushes,but I didn't think it was worth the trouble.

It is a "George Thomas" design out of his book.
The extra length on the top roller was left in case I needed to add an extra crank handle,it seems OK without at the moment.

It's possible to roll to the diameter of the top roller which is 1.125"

Allan

G.A. Ewen
08-30-2004, 02:58 PM
Very,very nice. http://bbs.homeshopmachinist.net//cool.gif

spkrman15
08-30-2004, 03:38 PM
I built one of those too. Took me longer then i thought but it works pretty good. Yours looks nicer thought.

Good Job

Rob http://bbs.homeshopmachinist.net//smile.gif

Ian B
08-30-2004, 03:49 PM
Nice work Allan!

Traction engine front wheels - which one are you building?

Ian

Michael Az
08-30-2004, 03:51 PM
Nice work allen. Be sure to show some photos of your traction engine.
Michael

Evan
08-30-2004, 03:51 PM
Very nice little machine you have there. Excellent work.

Allan Waterfall
08-30-2004, 04:09 PM
Ian,
The traction engine is a small 1"semi scale one called "Minnie"
If the wheels come out OK will post a pic. I'm just making a rivet closing gadget,there's literally hundreds of rivets on it,eg just the tyres to the rims needs 48.

Allan

Ian B
08-30-2004, 04:15 PM
Allan,

Funny you say that - I have a half-built Minnie in a cardboard box that I started when I was 16. Haven't done an awful lot on it for the past 28 years though...

The rear wheels started out as solid cast iron 8" pistons from a scrapyard. I'd never seen so much swarf in my life until that point.

One day...

John Stevenson
08-30-2004, 04:22 PM
Alan,
If you scaled it up twice size what do you think of it's capabilities of rolling 2" x 3/16" or 2" x 1/4" black strip.
With a bigger handle of course http://bbs.homeshopmachinist.net//biggrin.gif

I have a need for a supply of rings from 62mm inside up to 150mm inside in odd sizes that I can't get small quantities of thick walled tubing for.


------------------
John S.
Nottingham, England

CCWKen
08-30-2004, 05:55 PM
Great Work Allan!

Misplaced your socket head countersink, eh? http://bbs.homeshopmachinist.net//wink.gif

Still a fine display of craftsmanship. Can't wait to see the engine.

matador
08-30-2004, 07:38 PM
nice job,allan.i'm jealous!as for riveting,this must be a whole art in itself.i tried on the frames for my "metre-maid",but chickened out and used home made3mm hex hd screws.hans

charlie coghill
08-30-2004, 08:45 PM
John S
Use a sprocket, chain and gear box reduction. That is how I drive the roller on my rolls. Although my roller is much smaller than Allan's is.
Charlie

WJHartson
08-30-2004, 08:48 PM
Very nice work. One thing that I have found useful on sliprolls and other hand operated rotary equipment is to make a large round wheel type handle instead of a crank. It give me more control on small parts and is always in the same position.

Joe

wierdscience
08-30-2004, 08:56 PM
Nice work,I was going to build a big set,but then I stumbled into one at an auction for cheap.

Nice work too on the traction engine!

m_kilde
09-01-2004, 04:04 PM
Very nice work Allen

I'm working on a small roller bend my self, and your pic's sure is inspiration - tanks for sharing

Mogens

dvk
09-01-2004, 04:27 PM
very nice work allen,
It's so rewarding to build your own tooling for a project, like to see your engine too, when it's built.