Team 4466 - Corner Riser Design

[Robo Hamsters]

Hello All,

During some CAD training exercises we came up with a corner riser design useful for creating a double-level drive base so we decided to share it here for all to use.



You can download the design from this page on our website: http://culpeper-robotics.org/structural/

Hope someone else will find this useful.

Enjoy

[Taylor]

Nice work.
I wonder if the folks from AndyMark might be interested in this concept ...

[Gary Dillard]

One comment (just based on some reasonable amount of sheet metal fabrication experience although I won't claim to be an expert). The final bend in the vertical plane would require a specific length punch to fit inside because of the very small gap (the die could still be full length). If you opened that up so that a full length punch of some thickness would fit then (I know 1/2" would work but possibly 1/4" are available over the length of the flange) you could use standard tooling on any press brake.

[James Tonthat]

Originally Posted by Gary Dillard

One comment (just based on some reasonable amount of sheet metal fabrication experience although I won't claim to be an expert). The final bend in the vertical plane would require a specific length punch to fit inside because of the very small gap (the die could still be full length). If you opened that up so that a full length punch of some thickness would fit then (I know 1/2" would work but possibly 1/4" are available over the length of the flange) you could use standard tooling on any press brake.

Another reason is you will need a bit of clearance for spring back when it gets bent. It's bendable as is, if the shop has sectionalized punches but as Gary pointed it, it would make it a bit easier for the shop. Although, sectionalized punches are pretty standard. I might put in a relief where the bends meet.

[Robo Hamsters]

Originally Posted by James Tonthat

Another reason is you will need a bit of clearance for spring back when it gets bent. It's bendable as is, if the shop has sectionalized punches but as Gary pointed it, it would make it a bit easier for the shop. Although, sectionalized punches are pretty standard. I might put in a relief where the bends meet.

Gary & James,

Thanks for the suggestions. You are both correct. As I said this was a training exercise we did to teach some CAD concepts. The design probably could be a little better. A gap where the flanges meet probably would be a great idea especially as it would also help make the part slightly (not much) lighter too. Possibly also could use some weight reducing holes in the vertical faces as well.

Anyone that wants to use it can feel free to do so, and also feel free to modify it and make it even better.


@Taylor: It would be really cool if AndyMark picked this concept up and ran with it. Might even send them the design.

[Robo Hamsters]

Here is Revision 2 of the corner riser design.



This can also be downloaded from our website at http://culpeper-robotics.org/structural/

[roystur44]

I like the bracket in the first revision. If you needed it to be stiffer you could add a tack weld to keep the flanges from separating if there is a twisting load. When forming the flanges there are a couple of different ways to get the final bend. There is air bending with a 89 deg die and and coining with a 90 deg die. It all depends on the material type and the minimum bend radius for the material thickness.

[roystur44]

I like the bracket in the first version . If you needed it to be stiffer you could add a tack weld to keep the flanges from separating if there is a twisting load. When forming the flanges there are a couple of different ways to get the final bend. There is air bending with a 89 deg die and and coining with a 90 deg die. It all depends on the material type and the minimum bend radius for the material thickness.