creating manifold

daniel_fuks

Hello everybody.
 I have a question about building a car exhaust manifold. I've been trying to build manifold with using sweep option. All works pretty good except fact that curves and bends on pipes doesnt look realistic. 
https://cad.onshape.com/documents/8ac7f6532830a866b2c4d3f0/w/8e9298f71f45564af43d5018/e/da239b5f930acc8f9e1893b3

What I want to achieve is possibly realistic bends and curves with realistic radius. I know i could build few different bends like 30, 45 and 90 bends and assembly them together but i saw this video ( https://www.youtube.com/watch?v=iTdg-kKJiEs&ab_channel=WillieDustice ) and i thought i could do it thus way.

I also would like to ask if onshape can give me a list of cuts i need to finish a runner. Im new with this software, mostly doing this for my fabrication/motorsport hobby. Let me know what you think and what i can do to build better manifold. Thank you all and have a great day

rick_randall

My advice would be that you look into the "frame" command. Take the free self paced course on frames (in the learning center), and see if it helps. Tube headers are certainly doable in On shape, but might be considered a mid-level type exercise - sounds like a perfect learning project. Good luck.

kate_winslet

compassmobile said:

Hello everybody.
 I have a question about building a car exhaust manifold. I've been trying to build manifold with using sweep option. All works pretty good except fact that curves and bends on pipes doesnt look realistic. 
https://cad.onshape.com/documents/8ac7f6532830a866b2c4d3f0/w/8e9298f71f45564af43d5018/e/da239b5f930acc8f9e1893b3

What I want to achieve is possibly realistic bends and curves with realistic radius. I know i could build few different bends like 30, 45 and 90 bends and assembly them together but i saw this video (https://www.youtube.com/watch?v=iTdg-kKJiEs&ab_channel=WillieDusticedollartreelogin) and i thought i could do it thus way.

I also would like to ask if onshape can give me a list of cuts i need to finish a runner. Im new with this software, mostly doing this for my fabrication/motorsport hobby. Let me know what you think and what i can do to build better manifold. Thank you all and have a great day

Hi Daniel,

I’ve been working on a similar project and faced the same issue with unrealistic curves and bends. What helped me was using the loft feature instead of sweep for smoother transitions. Also, experimenting with different guide curves can improve the realism of the bends. Onshape does have some tools for creating cut lists, but I’m still figuring out the best way to utilize them for my projects. Your idea of combining different bend angles sounds practical too. Keep experimenting, and good luck with your manifold!

john_lopez363

@daniel_fuks... Sweep works great....just need to learn how to use 3-D Curves/Splines!

rick_randall

My advice would be that you look into the "frame" command. Take the free self paced course on frames (in the learning center), and see if it helps. Tube headers are certainly doable in On shape, but might be considered a mid-level type exercise - sounds like a perfect learning project. Good luck.

kate_winslet

compassmobile said:

Hello everybody.
 I have a question about building a car exhaust manifold. I've been trying to build manifold with using sweep option. All works pretty good except fact that curves and bends on pipes doesnt look realistic. 
https://cad.onshape.com/documents/8ac7f6532830a866b2c4d3f0/w/8e9298f71f45564af43d5018/e/da239b5f930acc8f9e1893b3

What I want to achieve is possibly realistic bends and curves with realistic radius. I know i could build few different bends like 30, 45 and 90 bends and assembly them together but i saw this video (https://www.youtube.com/watch?v=iTdg-kKJiEs&ab_channel=WillieDusticedollartreelogin) and i thought i could do it thus way.

I also would like to ask if onshape can give me a list of cuts i need to finish a runner. Im new with this software, mostly doing this for my fabrication/motorsport hobby. Let me know what you think and what i can do to build better manifold. Thank you all and have a great day

Hi Daniel,

I’ve been working on a similar project and faced the same issue with unrealistic curves and bends. What helped me was using the loft feature instead of sweep for smoother transitions. Also, experimenting with different guide curves can improve the realism of the bends. Onshape does have some tools for creating cut lists, but I’m still figuring out the best way to utilize them for my projects. Your idea of combining different bend angles sounds practical too. Keep experimenting, and good luck with your manifold!

john_lopez363

@daniel_fuks... Sweep works great....just need to learn how to use 3-D Curves/Splines!

daniel_fuks

john_lopez363 said:

@daniel_fuks... Sweep works great....just need to learn how to use 3-D Curves/Splines!

wow i didnt know about 3d lines, i wass trying to use spline, thanks for your help