Machsupport Forum
General CNC Chat => Show"N"Tell ( What you have made with your CNC machine.) => Topic started by: chrisjh on July 24, 2013, 07:04:03 AM
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Hi,
The most complex part I have milled to date.
A model train enthusiast approached me with his Autocad Sketch of a 1/16 Scale model of a Queensland Rail Steam Locomotive Type BB 18¼ . (The pistons were 18¼” Diameter). As I understand it, this loco was the last steam loco produced for Queensland Rail before the era of diesel locos. A couple of YouTube videos here:
http://www.youtube.com/watch?v=Q5sjF08rh3Q
http://www.youtube.com/watch?v=A7raefYygyI
I had to create a 3D model of his drawings so I could program the part using HSMXpress. All 4 sides had to be machined with many processes. I ended up creating 4 datums, one for each side so I could use the same reference point the LH side of the fixed jaw on my milling vice as I rotated the material.
I proved out my programming with a first off in Aluminium before switching to the final brass material.
The attached pics show the Solidworks 3D Model, then a couple of views of the completed chassis as it came off my X3 Mill.
I miss the age of steam!! Enjoy
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Chrisjh
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I miss the age of steam!! Enjoy
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Chrisjh
If these insane fuel prices continue, the age of Steam may not be over yet! I have been working on my first Steam Wobbler engine, but did not succeed in aligning the cylinder walls in a straight line of travel in relation to the packer box. Causing it to seize at a certain point of travel. So a new casting will be neccessary. I just haven't gotten around to doing it (yet). This summer's grass-growing season hasn't let up much! So it will probably be a winter project.
-Mike