Hey guys, I'm sorry for not keeping you up to date. In the week after the kebab restaurant 500 degree heat treatment I've finished the T6 treatment in a big oven from a company that produces high-tech limb prostheses. It's always good to have some contacts. Now the frame is sitting in the basement waiting for its motor, but right now I don't have any time because of university. Right now, I'm in the middle of my practical semester at Bosch, had to move away from my hometown for still 3 and a half months.. coudln't take my workshop with me. On top of that, I wrote my pre-thesis with the topic "development and production of a 3-axis Gantry-CNC milling machine". The machine I developed is nearly finished, I just need to produce the last few parts, which I will do in the next semester. After this is done, I will finally build up the bike
I'm totally excited already
With the CNC-mill at home, I'll be able to produce better tooling for framebuilding or -of course- frame parts with nice shapes.. really looking forward to this. In any case i will keep you posted when somethings happening with the frame!
Skaiwerd wrote: ↑
Oct 14, 2017 9:06 pm
Got to love a kebob place down the down the street to toss your frame into for a quick heat treat. Best part of the story. If you round over the edges don’t go to far as the crisp edges define its minimalism, that I like. Please keep up the good work when you have the time. Will the swingarm fit a 27.5 inch x 2.8? Make inframe gussets that are also the motor mounts for the cyclone 3000 and this would be a hit. Please work on this idea for your next one, that i would be interested here in USA.
Yeah I really appreciate the kebab restaurant doing this for free! I won't round over the edges, because I also like the look and I think it makes the frame look unique and some kind of "prototype-looking". I designed the frame for 26" x 2.75" tires, but making another swingarm for bigger wheels is not a problem at all. Heat treatment is the only problem..
As much as I like the cyclone motors, I don't like the fact, that it's not my construction. I'd like to do as much as possible by myself, and keeping in mind that I will have a CNC machine at home will make many things way easier. But of course I will keep this idea in my mind
recumpence wrote: ↑
Oct 15, 2017 1:31 pm
I hate to muddy the waters (heat treating can be a very volatile topic), but, I have never heat treated any of my aluminum frames. They have been fantastic without. This frame is so over built it would be fine without. That being said, if heat treating is an option, go for it.
Well I'm somehow feared that this thing could break over time, because I don't really know how good my welding really is. Of course I cut some of my welds open and checked them (they where always good), and from the outside they look good aswell, but still theres this fear inside of me, because I'm doing all the development etc on my own without any experiences. Plus the alloy I'm using is 6060, not 6061 (which is common in the USA). It's pretty hard to get 6061 in germany, especially extruded profiles. Looking at the material properties, there are huge differences.. 6061 would be way better but like I said, i couldn't find any distributer..
The best alloy thats available in round tubing is 7020, which is again better than 6061 + theres no need in heat treatment, i will definetly give it a shot in future project, when I have the tools to miter-cut round tubing.
Promodbike wrote: ↑
Nov 27, 2017 2:22 pm
Hi guys, this thing is one year old !?
Whats up, Jordan ?
Are there difficulties or anything in the way ?
i want to see the finished bike, it is very interesting.
As I mentioned above, I don't have enough time right now to finish the bike. But one thing is for sure, I will show it to you guys!
macribs wrote: ↑
Nov 27, 2017 3:55 pm
Forgot all about this thread, and had to re read it all. I agree, we really need to see the final result of all this hard work. That kebab pizza oven was the icing on the cake. Really made my day. Great learning project for an engineering student, and I must say kudo for keeping with your initial plans and go all the way with heat treatment and all. That frame should hold up to all kinds of abuse year after year.
What kind of motor and battery did you end you using?
For this frame, I guess I will use a QS205 motor or somehing similar. The battery will be 72V nominal with a capacity of around 20Ah. But for the first test, I will use a spare 12 Fet hot rodded controller with cooling fans (hehe
) and my 48V battery just to get a better feeling of the bike.
At this point I want to thank you guys for reading my posts and commenting on my work. The community is so nice here
It's really motivating me, and I'm definetly looking forward for more self made EV stuff
Skaiwerd wrote: ↑
Dec 02, 2017 6:31 pm
Inquiring minds want to know.
What does that mean? Sry for my bad english