floydjer
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"There is no duck side of the moon..."
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« on: February 10, 2010, 09:20:53 AM » |
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Note how the diagonals were installed.
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I`d never advocate drugs,alcohol,violence or insanity to anyone...But they work for me.
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SPARKY
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« Reply #1 on: February 10, 2010, 10:47:01 AM » |
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I wonder if that was so they could weld the joint on the inside of that tube intersection?
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" I am a firm believer in the people. If given the truth, they can be depended upon to meet any national crisis. The great point is to bring them the real facts." A. Lincoln
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Rex Schimmer
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Only time and money prevent completion!
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« Reply #2 on: February 10, 2010, 10:58:14 AM » |
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Floyd,
I see you have been looking at the thread I posted to the off road fabrication site. That is a trully beautiful joint, they call them "nodes" but I could not even imagine making one of these by hand. Perfect "concentricity" and fit. As I understand they have a robot and a laser cutter that trim the tube ends for this type of perfect fit. The off road guys are certainly the leading fabricators of tube race car chassis these days.
Have you looked at the "bulkhead" joint designs?? Very interesting stuff. Great looking shop too.
Rex
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Rex
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floydjer
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"There is no duck side of the moon..."
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« Reply #3 on: February 10, 2010, 11:44:12 AM » |
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Sparky, That`s what I figured too. Rex.........Hmmmm......Think I stole it from Metalmeet...Maybe :cheers:JERRY
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I`d never advocate drugs,alcohol,violence or insanity to anyone...But they work for me.
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Freud
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« Reply #4 on: February 10, 2010, 11:55:16 AM » |
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Foydjr
Excellent Foto.
FREUD
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Since '63
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willieworld
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« Reply #5 on: February 10, 2010, 01:38:41 PM » |
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ive done diagonals like that before---it wasnt for welding---it was for tube placement---after the fishmouth (cope) is made one side is cut off so the tube will fit ---sometimes thats the only way to get it to fit in willie buchta
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willie-dpombatmir-buchta
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Rex Schimmer
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« Reply #6 on: February 10, 2010, 01:39:16 PM » |
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FLoyd, Try this thread to a off road web site. This specific thread is from a guy that is building off road trucks at the Herbst shop. You will see your picture in it plus many more very interseting fabrication methods. Rex http://www.race-dezert.com/forum/showthread.php?t=31417 |
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Rex
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robfrey
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« Reply #7 on: February 10, 2010, 02:16:12 PM » |
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That is a beautiful joint!
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6363 A/BG ALT
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Seldom Seen Slim
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« Reply #8 on: February 10, 2010, 02:21:37 PM » |
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I'll say it before someone else does -- Rob, that sounds like something I would have said back in the day. Yeah, man, I see it, too.
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Jon E. Wennerberg
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JoshH
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« Reply #9 on: February 10, 2010, 03:06:39 PM » |
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Anybody interested in fabrication should have a look at the link Rex posted. Go through all the pages; these guys are SEROUS....
Thanks for sharing!
Josh
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hitz
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« Reply #10 on: February 10, 2010, 03:32:44 PM » |
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That's like a old common tube aircraft joint. They called them cluster joints and all of the tubes center lines point to the same point. They were oxy/acet.welded then and welded after all the tubes were prepared and positioned. Very nice isn't it.
harv
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« Last Edit: February 12, 2010, 11:48:10 AM by hitz »
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johnneilson
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« Reply #11 on: February 10, 2010, 03:59:40 PM » |
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I think Willie has the correct answer, those tubes needed relief to be placed and then completed.
As a note, someone mentioned laser/plasma cutting the fishmouths. I was into Karting deeply for some years, the manufacturers have a machine that feeds a length of tubing through the throat, uses a laser to cope the end rotates it and then bends the tube. Since the chassis parts are a single pc with multiples of bends and orientations. Fantastic to see the videos.
It is too bad that that joint will be painted or powdercoated, a work of art.
John
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1st Gen Miata Fiberglass and Carbon Fiber components from legendary Molds. www.jnent.net |
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Rex Schimmer
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« Reply #12 on: February 10, 2010, 08:13:06 PM » |
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Pics of truck frame that this joint is on.
Rex
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Rex
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jdeleon
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« Reply #13 on: February 10, 2010, 10:47:07 PM » |
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Incredible work! I spent a couple hours just looking the pictures.
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panic
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« Reply #14 on: February 11, 2010, 01:20:17 PM » |
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IIRC that's what Yetman bike frames looked like 45 years ago; Tony Foale has done similar.
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