We are interested in using Bosch Aluminum Structural Framing for the robot frame and would appreciate any suggestions. If you use proprietary extruded framing for your robot, who is the manufacturer? We are considering Bosch 30x30. Is this too light for the frame? Did you use Aluminum Structural Framing in the past and change to something else? What are you using now?
Our team used the 30x30 the last two years for the frame and all other structural members. I think it’s pretty good. Nice and beefy. You could probably get by with the 20x20 stuff for the less stressed structure and save some weight.
We used 30x30 last year, and it was ok i guess. It was great for moving stuff last minute and replacing parts… but it we really went thorought a lot of it.
we had a robust frame with the extrusion, but when we reamed the goal full speed (which we did religiously) the bosch would bend, deform and shear a lot. It might just be because we beat it pretty bad, otherwords it was great. the reason why i think it was just because we beat on it is becasue instead of the peices breaking, the bolt sheared first! so therefore the extrusion had to of been pretty tough!
We are using thick wall 6063 aluminum thick wall tubing that is 2" square for the frame and chassis. We have about 100 feet of this stuff and about 100 feet of 1.5" square and 100 feet of 1.25" square that we got for free. We plan on welding the frame and chassis and we might as well go for the stronger stuff. (plus it was free)
This year is the first that we’re going to use the Bosch extrusion. In the past, we’ve used .5" square Al tubing, and it has held up fairly well. We only ever got dented once, but even then, the tubing survived much better than the .25" plate that got hit.
Therefore, we decided to stick with the 20x20 (approx .75") since we figured 30x30 (approx 1 1/8") is overkill. We have no idea how it’s going to turn out, but we’re hoping for the best.
*Originally posted by Harrison *
**I have never seen the Bosch bend on a robot.
We have have problems at the corners tho. Sometimes the gussets don’t hold all that well.
Make sure you double them up in high-stress areas. **
it wasn’t exactly that the aluminium would bend, but the bolt would rip thorought the gussets and the peice would rip off…
also don’t forget to use some lock-tight on the bolts! they really get vibrated around and will unscrew if u don’t (and sumetimes even if u do).
also, where there is going to be a lot of impact or stress in any way, sometimes it is best just to bolt straight thorought the extrusion. It is much stronger than any hardware you can use.
i’ll tell you now, if you use extrusion, make sure to have plenty of extra extrusion, nuts, bolts, and loctite on hand. you will most definitly need it. that being said, if i remember to, i’ll take a picture of our robot from last year, and show you how the extrusion currently is (and this is with several parts completely removed cause they were too far gone to fix).
*Originally posted by tenfour *
**Bosch tubing is more expensive, but it is well worth it.
Our robotics team is all designed already and we will be beginning our chasis on Sunday. **
Yes, we have always used 30x30 and made our own corner brackets (gussets) from .25" T6 aluminum plate. We will use 3/16" or .25" aluminum plate to mount everything. (electronics use 1/8" plate.) And yes, we will be starting the chassis on Sunday 1/12/03.
*Originally posted by M. Krass *
**For LI teams, look to Atlantic Industrial Technologies (www.aitzone.com) as a supplier. Last season, they offered a discounted package of materials to FIRST teams. **
Actually, we checked up on it today, they are giving a discount this year too.
I have a question: how does one go about ordering Bosch extrusions or similar products. My team has never used anything like that (we’ve always been fans of steel), and don’t know all that much about extruded aluminum.
*Originally posted by Carl Owenby *
**We are interested in using Bosch Aluminum Structural Framing for the robot frame and would appreciate any suggestions. If you use proprietary extruded framing for your robot, who is the manufacturer? We are considering Bosch 30x30. Is this too light for the frame? Did you use Aluminum Structural Framing in the past and change to something else? What are you using now?
Team 654 **
we are using 10/10. You can go with a fairly small size and still have plenty of beefiness, probably even more than you need. Keep in mind that extrusion is VERY heavy in the larger sizes, heavier than steel I believe.
*Originally posted by Jeff Waegelin *
**I have a question: how does one go about ordering Bosch extrusions or similar products. My team has never used anything like that (we’ve always been fans of steel), and don’t know all that much about extruded aluminum. **
Well, once you have the size that you want determined, you can order the peices. Hardware wise, there are many types of connectors you can use, some better than others. Also there are hundreds of attachments and special, specialized peices for certain functions. I think it best to get the catalog and flip through that before ordering anything.