Author Topic: Manufacturing Web-Spoked Wheel Inserts  (Read 498 times)

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Offline Doddy

Manufacturing Web-Spoked Wheel Inserts
« on: Jan 29 2021 13:20 »
Short of producing a male/female die and pressing thin brass discs into shape I am devoid of ideas - any thoughts?




Many thanks in advance

Robert
"You don't know what you don't know"

Offline John Candy

Re: Manufacturing Web-Spoked Wheel Inserts
« Reply #1 on: Jan 29 2021 16:24 »
Perhaps have a pattern machined and use to cast in resin or whitemetal?

You could make a pattern from plastic card.

I am assuming you intend to overlay onto a disc wheel?

John.
My fellow Members, ask not what your Society can do for you, ask what you can do for your Society.

Offline cabbage

Re: Manufacturing Web-Spoked Wheel Inserts
« Reply #2 on: Jan 29 2021 18:43 »
When I was building Rosebud my Krokodil. I used the brass wheel etchings from Mike Williams to turn LNWR wheels into H section spokes. These I stuck onto a few layers of plasticard and cut out the gaps between the brass with a knife... The sandwiches were then glued into the machined cavities of the wheels.

The end result was a 2mm thick wheel back and a 6mm thick insert.

Regards

Ralph

Offline Peaky 556

Re: Manufacturing Web-Spoked Wheel Inserts
« Reply #3 on: Jan 29 2021 19:18 »
Doddy, if they are non-structural then get a model created then print them.
If structural then use your print to make a mould for casting in resin.
Regards,
Thank you,
Tim
Facebook.com/AppleTreeRailway/

Offline IanT

Re: Manufacturing Web-Spoked Wheel Inserts
« Reply #4 on: Jan 29 2021 22:00 »
Maybe try your original idea of a male/female die but using 3D printed dies...???
https://www.youtube.com/watch?v=-3IyodZSA70

Regards,

IanT
Nothing's ever Easy - At least the first time around.

Offline MikeWilliams

Re: Manufacturing Web-Spoked Wheel Inserts
« Reply #5 on: Jan 30 2021 10:41 »
Maybe I'm just being dense today but I'm not sure what you mean by a web-spoked wheel.  Are the spokes T section?  A bit like the webs around the crankpin on some GWR loco wheels?

Mike

Offline Doddy

Re: Manufacturing Web-Spoked Wheel Inserts
« Reply #6 on: Jan 30 2021 11:43 »
To be honest Mike, I don't know what the correct term for the shape is.

In the picture below the outer side of the wheel insert has curved spokes and the inner sides where the gap is, is more of a set of straight or flat spokes



I think I might have to write a letter or two to Kawasaki and Nankai for help with this one.

Thanks

Robert
"You don't know what you don't know"

Offline Traininvain

Re: Manufacturing Web-Spoked Wheel Inserts
« Reply #7 on: Jan 31 2021 12:13 »
If I'm understanding what you're aiming to do, then one rough and ready way if you don't need too many wheels and have a lathe and mill to hand may be to fabricate some webbed inserts/overlays as follows:

- machine a length of brass round in the lathe to the diameter of the webbed piece to be inserted between the wheel tyres
- drill the centre of the round to take the axle
- remove brass round from lathe and mill one of more grooves (as many and as wide as required) across the centre line of the machined and drilled end. The grooves will hold brass flat of suitable size to simulate the pressed bits
- put the round back in the lathe and part off as thin as you can
- repeat as required
- to finish the inserts, fix short lengths of brass flat into the grooves with glue or solder

A bit long winded but just a thought