topic Re: Two stroke exhaust pattern in Fusion Design, Validate & Document Forum

Two stroke exhaust pattern

Anonymous — Fri, 27 Mar 2020 00:20:43 GMT

Hi all I’m trying to use the program to go from

strait cone drawings Bending the cones keeping the centreline the same

then un rolling them to a flat pattern that can be water cut.

I have done this before on a free trial of rhino5 and it worked well my free trial has now expired

spent the afternoon on Autodesk and can’t get it to do what I want it to do

Re: Two stroke exhaust pattern

laughingcreek — Fri, 27 Mar 2020 00:39:45 GMT

fusion has some flattening capabilities via the sheetmetal tool, but it won't directly do what it sounds like your trying to do. It's surfacing tools are generally not as devolved as rhino's.

Do you have a model? or a picture/diagram?

Re: Two stroke exhaust pattern

Anonymous — Fri, 27 Mar 2020 00:55:19 GMT

So this is what I need to do only with a different set of pipes

Re: Two stroke exhaust pattern

TheCADWhisperer — Fri, 27 Mar 2020 10:47:52 GMT

Use hybrid sheet metal modeling techniques in Fusion.

Re: Two stroke exhaust pattern

Anonymous — Fri, 27 Mar 2020 10:49:48 GMT

??? How do I do that thanks

Re: Two stroke exhaust pattern

Anonymous — Fri, 27 Mar 2020 11:13:23 GMT

Thanks watched your video https://youtu.be/DRsjSew7SxU

Is there a way to do many cones (15 cones) at once

Rather than drawing each cone separate

thanks

Re: Two stroke exhaust pattern

TheCADWhisperer — Fri, 27 Mar 2020 11:39:25 GMT

If I were doing this - the first thing I would do is model the entire design as a single solid body (no wall thickness, no separate components).

Once I have that completed I would understand the geometry that I need and have an envelope/scaffold defining the geometry.

My first attempt is nearly always a trial to understand the geometry.

Re: Two stroke exhaust pattern

chrisplyler — Fri, 27 Mar 2020 16:17:39 GMT

Fusion sheet metal space will unfold items that adhere to the sheet metal requirements. Compound curves do not fit the requirements. If those exhaust pipes are composed of several truncated cones (without compound curvature) welded together, then you have a chance.

Re: Two stroke exhaust pattern

Anonymous — Fri, 27 Mar 2020 18:18:21 GMT

Drawing the pipe was not that bad and making each cone in to a body was fine my first try was just to do a straight pipe off all the cones but turning that in to something that can unroll is challenging

the is no compound curves in the pipes

I have to bend the pipe While the center line of each cone strait. So I may have to cut the cones in to more parts to get a smoother bent

and now my computer has just blew up (It is ten years old). Was On its third battery and now it’s dead So will get a new one. Download again and try again unless my mate comes back to me with the rhino5 software

thanks for all the help will update when I’m sorted with a new laptop

Re: Two stroke exhaust pattern

choddercars — Sun, 15 Jun 2025 05:39:08 GMT

hi, did you ever get this sorted out? I am in the same process, I have basically drawn the exhaust to size the done a revoke to solid, now I have to chop it up to create angles, then hollow it out then hopefully change to sheet to flatten, the to weld it together to fit the motorcycle, not easy as there are 4 pipes involved, I was hoping you sorted this out, thanks

Re: Two stroke exhaust pattern

TheCADWhisperer — Tue, 17 Jun 2025 13:47:43 GMT

@choddercars

Because of Fusion changes over time, it would probably be best to start a new discussion thread with a link back to this thread as reference.

Can you File>Export your *.f3d file to your local drive and then Attach it here to a Reply?

I would model as a solid body.

Create a Component for each component.

Offset surface zero.

Thicken each component and convert to sheet metal and add Rip as needed.