Brass dome cover construction

Brass dome cover construction

This topic has 10 replies, 3 voices, and was last updated 28 January 2015 at 15:29 by andrew winks.

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28 January 2015 at 07:43 #1367
andrew winks
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@andrewwinks64215
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28 January 2015 at 07:43 #177551
andrew winks
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@andrewwinks64215
Thought I'd share some very pleasing fabrication of a dome/safety valve cover for my 5" gauge Queensland Railways A-10. These are available as aluminium bronze castings but I thought it would be a rewarding exercise to machine and fabricate from solid brass round and phosphor bronze tube, both scrap "donations" to my workshop of ferrous supplies. Below, machining the top from solid brass round section.
28 January 2015 at 07:45 #177552
andrew winks
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@andrewwinks64215
step 2, rough out the top and fit to PB tube section.
28 January 2015 at 07:48 #177553
andrew winks
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@andrewwinks64215
Weld a former/spigot together to form a die to press the PB into shape. Anneal first. Simple press fabrication from angle, etc. 12 tonne bottle jack provides the encouragement..
28 January 2015 at 07:49 #177554
andrew winks
Participant
@andrewwinks64215
looking OK, shape is appealing and even.
28 January 2015 at 07:50 #177555
andrew winks
Participant
@andrewwinks64215
Check fit..
28 January 2015 at 07:51 #177556
andrew winks
Participant
@andrewwinks64215
Final skim to size
28 January 2015 at 07:54 #177557
andrew winks
Participant
@andrewwinks64215
Quite pleasing, close to prototype. Producing these parts is most fun one can have standing up!!
28 January 2015 at 09:12 #177566
Johnboy25
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@johnboy25
Congrats… Nice piece of work. Certainly looks the part.

John
28 January 2015 at 10:29 #177578
Jeff Dayman
Participant
@jeffdayman43397
Great job Andrew, well done. Nice to see a good bit of presswork done in the home shop. JD
28 January 2015 at 15:29 #177597
andrew winks
Participant
@andrewwinks64215
Thanks! Used a similar method to produce the petticoat for the stack.

The engine is running on air, boiler was completed and hydrostatic tested in 2014 (I have a bunch of pics on the boiler construction that I will post one day soon) and hope to have first steam up before mid year. Bought the castings in '97 so about time I made some solid progress!

Andrew
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