topic Re: Lofting a round multi-radius profile along a curved path in Fusion Design, Validate & Document Forum

Lofting a round multi-radius profile along a curved path

ea425019 — Mon, 02 Feb 2026 17:24:01 GMT

Hi,

I am having trouble with the loft/sweep commands for this one. Please advise how you would make this profile (a bore) thru this part. It's centerline is evident, and the profile is as well.

Thanks.

Re: Lofting a round multi-radius profile along a curved path

TrippyLighting — Mon, 02 Feb 2026 17:34:46 GMT

Revolve and sweep:

Re: Lofting a round multi-radius profile along a curved path

ea425019 — Mon, 02 Feb 2026 22:29:02 GMT

That is within reach on this model.

There are variants which will have shape changes along the curve. For those I will still need a process to handle.

Laying out a series of construction planes and sketches with circles as a basis for lofting is another way, but I'd like to hear of a complete solution.

If fusion allowed Revolve to work curves that would be awesome!

Re: Lofting a round multi-radius profile along a curved path

TrippyLighting — Mon, 02 Feb 2026 23:29:37 GMT

@ea425019 wrote:

That is within reach on this model.

There are variants which will have shape changes along the curve. For those I will still need a process to handle.

My post presented a solution to the problem you presented.

If you want to hear about a complete solution, you need to provide a more complete problem description.

Re: Lofting a round multi-radius profile along a curved path

TheCADWhisperer — Mon, 02 Feb 2026 23:53:34 GMT

@ea425019

My guess is that this will be easy.

Re: Lofting a round multi-radius profile along a curved path

johnsonshiue — Tue, 03 Feb 2026 17:15:19 GMT

Hi! This can be done by using Guide Rail Sweep (the rail and the path need to be tangentially continuous). I have modified the sketch so that the sharp corners are all rounded. For fluid processing design in general, rounded corners are usually preferred. Please take a look.

Many thanks!

Re: Lofting a round multi-radius profile along a curved path

JamieGilchrist — Tue, 03 Feb 2026 19:25:30 GMT

Hi @ea425019,

The key to doing this in Fusion is that it will need to be multiple features to accomplish this for even more varied changes in the swept profiles, and will likely use sweeps, revolves, holes, and lofts to achieve this, as @TrippyLighting demonstrated.
If you have a specific scenario in mind, the community is more than happy to share some methods.

Here is an example of different features to accomplish what Trippy showed. I'm not advocating this method as the most efficient means of achieving your particular scenario, just that you can use a number of different tools/methods to get there.