Author Topic: bends VS welds  (Read 3233 times)

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Bug

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bends VS welds
« on: December 07, 2009, 10:24:03 PM »
is this acceptable on a smaller buggy. Instead of bending the roll bars, can they be cut. fish mouthed and then weld a gusset of some kind to it ? 
about 500 pound total wieght for finished buggy just to give more info.
Thanks

Offline Doug Heim

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Re: bends VS welds
« Reply #1 on: December 07, 2009, 10:53:51 PM »
Looks good to me. I would trust that. Better than some methods Ive seen to get away from bending. I would even go as far as to say that right there may be stronger!

Offline komelika

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Re: bends VS welds
« Reply #2 on: December 07, 2009, 11:51:30 PM »
I'm no expert, but I would probably gusset the inside radius of the joint instead of welding to the side of it. Still looks strong to me as long as the welds penetrate.
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Offline BDKW1

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Re: bends VS welds
« Reply #3 on: December 08, 2009, 12:36:21 AM »
Nothing wrong with that other than ascetics. It would have looked so much better if the tube end cap and gusset were all one piece.

Offline komelika

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Re: bends VS welds
« Reply #4 on: December 08, 2009, 04:58:45 AM »
Would it be overkill to gusset from the front as well? Probably, huh?
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Re: bends VS welds
« Reply #5 on: December 08, 2009, 06:23:44 AM »
When I first started building that's how I did it...I'm with BDK...It would be easier and look way better with the gusset as the end cap
But that looks pretty good Buginator

Offline fabr

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Re: bends VS welds
« Reply #6 on: December 08, 2009, 06:38:07 AM »
There has been a lot of discussion about the pros and cons of gussets in a frame. Some say that the gusset spreads the load over a larger area and others feel that the gusset just encourages failure at the ends of the gusset. IMO your gusset will accomplish making that joint stronger but POSSIBLY adding stress at the ends. At any rate I think your gusset in a 500# car will be more than adequate. I do agree tho with the gusset and end cap being one piece would be a neater approach.
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Offline Hammerworks

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Re: bends VS welds
« Reply #7 on: December 08, 2009, 10:36:20 AM »
That gusset was added after the cap was already there,to add strength for a larger motor.

I worked for a drag race fabricator who swore mitering(frame rails) was stronger than bending,because bending ultimately thins one side of the bend(especially on rect. tubing) and thickens the other.

Offline BDKW1

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Re: bends VS welds
« Reply #8 on: December 08, 2009, 12:03:37 PM »
Mitering is only as good as the guy doing the welding. Bending is pretty is inherently a lot more consistent.
 
Gussets will promote cracks at the ends of them if the rest of the structure isn't rigid enough. I would have tapered them down to a thinner point at the ends.

Offline Engineer

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Re: bends VS welds
« Reply #9 on: December 08, 2009, 12:40:13 PM »
+1 to all comments.  ;D  Bends look nice sometimes.....  Structurally your good.

For a one time car builder an investment in a bender for 10-15 bends is a bit crazy.  Measuring miter cuts are a lot easier as well.

Offline fabr

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Re: bends VS welds
« Reply #10 on: December 08, 2009, 12:44:31 PM »
Mitering is only as good as the guy doing the welding. Bending is pretty is inherently a lot more consistent.
 
Gussets will promote cracks at the ends of them if the rest of the structure isn't rigid enough. I would have tapered them down to a thinner point at the ends.
Good point.
"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

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 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Offline Carlriddle

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Re: bends VS welds
« Reply #11 on: December 11, 2009, 06:46:41 AM »
How bout holes, larger one in center and a smaller one on each side.  Weaker???  Would make it tad lighter, but I think the holes look much better.
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Offline komelika

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Re: bends VS welds
« Reply #12 on: December 11, 2009, 08:56:00 AM »

For a one time car builder an investment in a bender for 10-15 bends is a bit crazy.  Measuring miter cuts are a lot easier as well.

I see your point here. But, I did buy a bender for my first project. I kind of look at it like buying text books for a class. I want to build a buggy and learn how to bend instead of paying someone to do it. Besides, like text books, the bender can be sold when I am done with it. Then again, I may keep it for another project down the road. My daughter will need something to follow dad in when she gets old enough.
If you remain calm while everything around you is complete chaos... then you probably haven't fully understood the situation!

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Offline fabr

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Re: bends VS welds
« Reply #13 on: December 11, 2009, 10:09:49 AM »
My sentiments exactly.
"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

SPEC

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Re: bends VS welds
« Reply #14 on: December 11, 2009, 10:28:54 AM »
Mine too even tho my bending center left to pay the bills :'(

 

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