Thread: Welded Box Tube
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Unread 26-01-2004, 10:09
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Re: Welded Box Tube
You use 1/16" wall? After seeing the beating our summer robot Phoenix took at the Maryland State Fair (it was built out of a combination of 1.5x1.5 and .75x1.5, 1/8" wall) I'm beginning to doubt 1/8" wall. To each their own, but I know 1/16" wall is much harder to weld.

Aluminum joints are strongest if they're end-to-end instead of mitered. For instance, if you plan on doing this: (excuse the ASCII)

-------| <---- end piece
/ |
/ |
---| |
| |

This would actually produce a stronger weld:

-------- |
|
|
-------- |
| |
| |

If you do need to make mitered welds, I suggest welding the small angled end piece first instead of the base of the tube, because that end piece has a tendency to flex outward if you weld the base first.

Good luck!
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Gui Cavalcanti

All-Purpose College Mentor with a Mechanical Specialty

Franklin W. Olin College of Engineering, Class of 2008
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