Landracing Forum
Tech Information => Technical Discussion => Topic started by: floydjer on February 10, 2010, 09:20:53 AM
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Note how the diagonals were installed.
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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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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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Sparky, That`s what I figured too. Rex.........Hmmmm......Think I stole it from Metalmeet...Maybe :cheers:JERRY
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Foydjr
Excellent Foto.
FREUD
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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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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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That is a beautiful joint!
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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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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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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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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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Pics of truck frame that this joint is on.
Rex
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Incredible work! I spent a couple hours just looking the pictures.
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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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Wow nice work Beautiful welding!