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1/3 Scale Case Boiler


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  #21  
Old 10-31-2013, 01:37:22 PM
b7100 b7100 is offline
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Default Re: 1/3 scale Case boiler

Forming the smokebox partition. Shown is the lead hammer molding mold, melting pot, and box. Mold is in halves that clamps around the pipe nipple that screws into a longer pipe used as a handle. Then molding sand is packed around the mold. This arrangement makes changing heads easier when they get used up. The die with the part partially formed is shown along with the completed part and die. Die and part were bolted to the forks on the ASV while part was being formed.
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  #22  
Old 11-08-2013, 03:45:47 PM
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Default Re: 1/3 scale Case boiler

In machining the different boiler parts whenever possible I've bolted matching parts together and did all machining at once. This hopefully will make assembly much easier. 1st photo shows the front flue sheet pressed into the throat sheet (with a short piece of the barrel as a spacer). this is bolted to the front firebox panel. All holes are located and drilled. Also sides of the throat sheet and smokebox panel are trued up without having to do another setup. 2d photo shows the front flue sheet and smokebox being bored for 11-1 1/4 boiler tubes. 3d photo shows trial assembly of flues. Did a little fileing so they should go together OK. 4th photo shows wrapper being readied for welding. Those are false rivets except for the curved part on top where I used bolts in every other hole to draw the wrapper tight. They will get rivets later. I ran rods through the stay holes with pipe spacers to pull the two ends paralell. I also squared up the bottom and welded in a brace. It is a real challenge to get everything true and square. Not sure how everything will turn out.
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  #23  
Old 11-30-2013, 04:38:49 PM
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Default Re: 1/3 scale Case boiler

Wrapper sheet, throatsheet, backsheet with all attachments is complete. The 77 degree angle as well as all the other angles were bent over a die to make every thing uniform. (the real thing)
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  #24  
Old 01-01-2014, 07:24:05 PM
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Default Re: 1/3 scale Case boiler

Steam dome; I ran the top part through the shell and will weld it directly to the barrel. The shell is about .004 press fit. I thought it would be easier than trying to get a good weld up inside the 4" pipe. Also maybe less likely to leak. The fittings on the side of the dome are drilled and tapped through both the inner and outer shells. Last picture shows the forming die. The radius on top of the dome (.646) was formed on the lathe using co-ordinances (like a bolt circke) then filing the ridges to make it smooth then polishing with emory. The forming die was milled the same way on the bridgeport. I was able to get an exceptionally good fit this way. I intend to mill the base of the stack the same way. Next is the front axle bracket.
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  #25  
Old 01-02-2014, 03:49:53 PM
LAKnox LAKnox is offline
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Default Re: 1/3 scale Case boiler

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Originally Posted by b7100 View Post
Steam dome; I ran the top part through the shell and will weld it directly to the barrel. The shell is about .004 press fit. I thought it would be easier than trying to get a good weld up inside the 4" pipe. Also maybe less likely to leak. The fittings on the side of the dome are drilled and tapped through both the inner and outer shells. Last picture shows the forming die. The radius on top of the dome (.646) was formed on the lathe using co-ordinances (like a bolt circke) then filing the ridges to make it smooth then polishing with emory. The forming die was milled the same way on the bridgeport. I was able to get an exceptionally good fit this way. I intend to mill the base of the stack the same way. Next is the front axle bracket.
Correct me if I'm wrong, but the actual pressure vessel is the shiny inner piece, while the piece with the faux rivets is more-or-less decorative?

Lyle
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  #26  
Old 01-02-2014, 06:54:16 PM
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Default Re: 1/3 scale Case boiler

Yes. The plan called for the shiny piece to go down into the riveted piece about 1 1/2 " and welded inside. Being very difficult to weld inside a 4" pipe I decided to run the shiney piece all the way through the barrel and weld it there. I am trying to eliminate visible welding as much as possible. It just looks more like the real thing and some of my welding isn't the neatest looking. It also eliminates one joint that has the potential to leak.
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  #27  
Old 01-03-2014, 11:08:58 AM
LAKnox LAKnox is offline
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Default Re: 1/3 scale Case boiler

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Yes. The plan called for the shiny piece to go down into the riveted piece about 1 1/2 " and welded inside. Being very difficult to weld inside a 4" pipe I decided to run the shiney piece all the way through the barrel and weld it there. I am trying to eliminate visible welding as much as possible. It just looks more like the real thing and some of my welding isn't the neatest looking. It also eliminates one joint that has the potential to leak.
Couldn't find a robot welder? :-) Interesting solution to an, I'm sure, vexing problem. I just wish I had the skills, time and funds to build a scale myself. I'd probably go for a 1/2 Case 110, though that 5/8 Baker sure sounds interesting. I've only operated a Case stationary and a 65 as well as the sole-surviving H.W. Rice Co. stationary, from about 1885.

Lyle
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  #28  
Old 01-05-2014, 11:06:26 AM
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Default Re: 1/3 scale Case boiler

Forming the front axle bracket went well. Die is in 2d picture. Lead hammer and heat and beat method was used.
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  #29  
Old 02-17-2014, 05:51:05 PM
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Default Re: 1/3 scale Case boiler

[I] made some progress on boiler. Ashpan, and both draft doors are done as well as the engine mount and machining on barrel. Smokebox comes next (Picture #1). After that assembly of firebox, barrel, then install flues and stays.
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  #30  
Old 02-18-2014, 10:34:12 AM
Tim Mathis Tim Mathis is offline
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Default Re: 1/3 scale Case boiler

Really appreciate the pics and updates on your progress - PLEASE keep 'em coming! Fascinating and inspiring, looks like you're doing a great job and it's going to be a dandy engine when it's done!

The rivets were definitely worth the effort.
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  #31  
Old 02-18-2014, 08:11:42 PM
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Default Re: 1/3 scale Case boiler

Thanks Tim for the encouragement. I will keep the pictures coming as soon as I have something to take pictures of. There may be a dry spell as spring comes along. I have other obligations to tend to. As i get a little farther along I am going to need to aquire a casting set. Does anyone have a set they would be willing to part with?
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  #32  
Old 02-20-2014, 01:23:25 PM
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Default Re: 1/3 scale Case boiler

If you need any machining done, I just got new equipment in our shop a couple weeks ago to help out with the spring season. My new 9 x 36 South Bend Engine Lathe and a 20 ton press brake. I'm located in Waterford, Michigan
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  #33  
Old 02-22-2014, 08:17:17 PM
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Default Re: 1/3 scale Case boiler

Formed the firebox. Took a lot of heat'n and beat'n with lead hammers.
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  #34  
Old 02-22-2014, 08:51:29 PM
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Default Re: 1/3 scale Case boiler

Your getting pretty good at that. Where there is an idea there is a way. BV
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  #35  
Old 02-22-2014, 10:21:29 PM
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Default Re: 1/3 scale Case boiler

Oh shoot....I forgot to take that picture of those boiler tube rollers I have so you can see them. I'll make a note of that to do so tomorrow. I have been busy building whistles and whistle parts for the upcoming season.
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  #36  
Old 02-24-2014, 09:04:22 PM
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Default Re: 1/3 scale Case boiler

Here is that drawer full of boiler tubing rollers I was telling you about on the phone. The one next to the 2 inch tube roller is the one that will fit the tubes you bought for your model boiler. The only drawback is the smaller ones do not roll the edges over. We would need a separate tool for that if that is what you wanted to do. Your more than welcome to bring the boiler down here to my shop so we can work on getting them in place for you when you are ready. No hurry. I have a busy season ahead of me anyway.
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Old 02-24-2014, 09:07:03 PM
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Default Re: 1/3 scale Case boiler

Oh and I know this is a little to late now, but I probably could have saved you a ton of work from all that heating and beating you did to form your fire box. We just got a 20 ton hydraulic press that can shape metal up to 3/8 inch thick.

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Old 02-24-2014, 09:32:56 PM
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Default Re: 1/3 scale Case boiler

Thanks for the pictures. I will definately keep you in mind when it comes to rolling in the flues. What tool does it take to bead the ends with? I also might talk to you about making the bunkers when or if I ever get to it
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Old 02-24-2014, 09:36:28 PM
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Default Re: 1/3 scale Case boiler

Honestly, I'm not sure. I think Matthew might know better than I would.
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Old 02-25-2014, 09:33:34 AM
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Default Re: 1/3 scale Case boiler

My flues are not beaded on the ends, We rolled them in and left them. Haven't had any problems and if your not firing the little engine to hard they should be fine with such a small fire box, At least that' s what my very reliable guy told me when we did my engine 5 years ago.
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