topic Re: Create Complex Geometry - Roof Corner in Fusion Support Forum

Create Complex Geometry - Roof Corner

jackmcintyre231 — Thu, 14 Dec 2023 09:57:17 GMT

I am attempting to create a roof for a railway passenger carriage. The roof has a curved profile in both the transverse and longitudinal directions. The base of the roof follows the profile of the top of the carriage sides. I am struggling to replicate the geometry of the corner of this roof in fusion. I have created to sketches in each plane and am using the loft tool to create the corner (using the top of the sides as a constraint rail) (See attached photos). However, this isn't creating the right geometry. The main problem is that the roof does not meet tangentially to the other portions of the roof. Can someone please propose another method to replicate the geometry as per the prototype (photos attached)? This would be greatly appreciated.

Re: Create Complex Geometry - Roof Corner

davebYYPCU — Thu, 14 Dec 2023 10:33:04 GMT

First impression, the roof centre line appears to be too high, and lower

Centre crossing profile, will help with approaching angle, too.

Depending on your canvasses, you may be correct, but lower will make it look better.

Might help…

Re: Create Complex Geometry - Roof Corner

TrippyLighting — Fri, 15 Dec 2023 12:16:51 GMT

If you can share the model so we can platy around with the lofts, that would probably help.

Re: Create Complex Geometry - Roof Corner

TheCADWhisperer — Fri, 15 Dec 2023 14:13:12 GMT

@jackmcintyre231

This same design has appeared here before.

A search might turn up prior discussion.

Re: Create Complex Geometry - Roof Corner

jackmcintyre231 — Fri, 15 Dec 2023 21:16:18 GMT

@TrippyLighting would be greatly appreciated.

https://a360.co/3tb1b7D

Re: Create Complex Geometry - Roof Corner

davebYYPCU — Fri, 15 Dec 2023 23:53:42 GMT

Another rail or 2? I have done the top one,

will reduce the effect of the sharpish body corner.

Modell 1/4, and using body or edges for profiles, allows for tangency transitions, much better appearances are worth the effort.

Might help....