CNC'ing curved parts

[studysession]

How do I CNC this kind of part? It is curved and looks very hard to cut. I want to make one for a much bigger motor. The ones that I can buy are for small motors only.

Thanks!

[DareBee]

You should CNC it as a flat part and then bend it.
I assume you want aluminum. Use utility grade for formability (3003 series)

[studysession]

What is best way to bend it all even and correct shape?

[ger21]

Some type of press?

[studysession]

I have no clue - But I see these on EBay that people sell them and say they are CNC'ed. It is a motor guard for a Losi Mini-T 1/18 scale truck. Protects the motor from rocks. I am putting a much bigger motor on my Mini-T and want to make a bigger motor guard myself since I can not buy one.

I also want to be able to CNC parts like in this pic too. Not sure how to tell it to do the curved edges???

[Ken_Shea]

Depending on material hardness, thickness and width, this could be done by hand forming the radius around a appropriate size pipe and the 90 degree by clamping in a vice and bending this angle with a block of wood and hammer. Try a piece of scrap first to experiment.

[Ken_Shea]

I also want to be able to CNC parts like in this pic too. Not sure how to tell it to do the curved edges???

studysession, this item is not something that can be explained in a few post, perhaps not at all, I would not worry at this point how to CNC that part because first you have to be able to draw it in a suitable CAD and in a suitable manner for which you want to create the necessary toolpaths.

Looks to me that you chose an appropriate user name


Ken

[studysession]

Funny -
Yes, I study a lot. This has been a huge learning curve for me. right now I am researching dividing heads for cutting gears too. There is just so much to learn.

[DareBee]

Studysession
You have to remember that almost any type of equipment can be CNC.
That motor guard could have been made in turret punching machine or lasercut (CNC) and the formed in a brake press (CNC).
That part is not a good candidate to be machined from billet, although it is possible - difficult but possible.
The blue parts are machined from billet and will take multiple setups and programs.
You could do this with ACAD and 2.5d machining but would be VERY long and tedious process. You really need those parts 3D modelled so they can be machined using both 2.5 & 3D operations.

Ken - I hope this one isn't too creepy for you.

[studysession]

Just trying to get an idea - Eventually I want to get where i can make these kinds of parts myself. Want to get where I design my own hop-ups and cut them out and have unique stuff at the track that no one else has.

That is what I want. That and I just enjoy the learning and making these parts myself. It gives me great satisfaction when I do a part and do it right.

[kong]

Originally Posted by studysession Just trying to get an idea - Eventually I want to get where i can make these kinds of parts myself. Want to get where I design my own hop-ups and cut them out and have unique stuff at the track that no one else has.

And the fact that you could then sell these parts has nothing to do with it
Sorry man, couldn't resist! There is almost an open market over here for custom RC car parts since almost everything we buy is imported from the US.

[studysession]

It's all good! Today I am CNC'ing an EMaxx brace for a friend who has a Gorilla chassis. This brace will not fit a stock chassis.

I just enjoy doing it. I have posted on another board - tell people if they cad something that I can use on my cars. I will CNC it for them for free. This way I get some cool hop-ups drawn up that I can use myself.

I love doing this stuff.