Starting my bumper design

[twitchee2]

So my design is very similar to many that have been built before on the forums. but i figure ill show everyone and let me know what you think. Also how heavy is to heavy....its currently 123lbs and still need to add a tire carrier on top of that. it is pure beef tho

The pipes going to the wings are spec'd at 1.25x.065 and the two supporting the hitch are spec'd at 1.25x.120, all the plate is 3/16 and the main tube is 4x2x.25. is this a little overkill?

 

[xskydivingdudex]

looks really good dude!

 

[twitchee2]

thanks

(guess this should have been in the offroad section-my bad)

 

[techno]

Nice. Wish I had SW but sadly I use Pro/E...

Anyway, how do you plan to physically build it? Will you be cutting the sheet metal yourself and welding all the seems and joints or do you have access to a press brake to do some bends?

 

[twitchee2]

im probly going to send the drawings out to a cnc plasma cutter shop in town, then i have access to most any tool i could ever need on the campus shop. then ill just weld it up at the seems, thinking about making the back corner a nice curve rather then 90*

 

[JohnsD90]

...thinking about making the back corner a nice curve rather then 90*

But then it would be harder to mount the swing out.

 

[techno]

... thinking about making the back corner a nice curve rather then 90°

I agree. The sharp corner looks 'cheap' to me. Wouldn't need a big radius either, just something to make it fit with the body lines a little better and something that you don't keep smashing your legs and hips into. You can reduce a lot of the required welding by designing bends into the pieces.

 

[TC4Rnr]

I think you got the idea from BruceTS' bumper design. I have one of the later ones he made, let me tell ya, you don't need to use 3/16' all around. mine weights 70-80lbs. I installed it all by myself after (spray)painted it with a ratchet and a wrench.

there's a detailed build thread on UT.

 

[Polish Power]

3/16" is pretty stout. You could probably get away with 1/8". Run some FEA on that shit and find out.

 

[kregg]

I used 11 ga. for the sides on mine. 3/16 for the mounting, braces and main tube... It's beef too. 11 ga is fine, you'd rather have the bumper "give" before the frame did...