Fusion 360 | Case Study 28
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- Опубликовано: 6 июн 2022
- Extrude, web or rib?
Link to reddit post:
/ is_there_a_smart_way_t...
Link to starting file:
a360.co/3NEtaBe
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I would create a tangent plane on the boss, sketch->intersect for top and bottom of boss and draw a line between them.
Thin extrude two sides, walls centre aligned, using "To Object" for both directions. The outer ring needs to have the extent type changed to Adjacent Faces.
Pros: It can be parametric and the web thickness is independent from the boss or outer ring thickness.
This is definitely a good way. Did not think of this before. Might make a short video to demonstrate this. Thank you for the suggestion!
Here is the link to the new workflow:
ruclips.net/video/SVs9LbyM2i0/видео.html
Fusion 360 obviously just needs a "Do what I expect you to do" command. :)
Before making the rib via extrude, make a copy of the external surface of conical ring. Create the 'problematic' extrude as at 55 sec. Use the copy of the surface to trim off the unwanted portion - this will be parametric.
This is how I do it
You could also sketch in a plane normal to X then extrude the rib in the x direction. Setting your start and end conditions as the boss face and conical face.
I was the one who commented the trick with the adjacent faces, u need to select the top surface, not the inside of the cone. Then it will work.
Genial!!! me encantó. Muchas gracias
That was a very elegant way to do that 🙏
Try combining the 2 bodies first, even though they are not touching.
Does this work in Fusion 360? Onshape for example doesn't allow you to merge bodies that don't touch.
This is an interesting exercise, one other option is to create a section in the midplane of the boss, then extrude it in two directions, one to the face of the slanted ring, one to the external face of the boss. Most modern CAD systems (I'm sure both CREO and Onshape can do this) can extrude in two directions but not necessarily on opposite sides of the sketch plane, so you can comfortably place the sketch plane in the middle of the boss even if the resulting extrusion will be outside the boss.
The issue with ribs here is that multi-body systems like Fusion and Onshape don't consider a single body with detached geometry, something that, for example, CREO can do. I can't check if ribs in CREO would join the boss to the ring correctly but I think it might, even without a base.
Thx
My instinct will be: Create a tangent plane of the cylinder, project a sketch, and double extrude to surface.
Ian's solution is much more elegant I would say. Create a face instead of a body solves the issue.
I wish we could get the tutorial on how to make this shape
Hi, I have no plans to do that for now. Sorry about that. It is a tapered extrude of a circle followed by a shell. If you would like to, you can download the file using the link in the description and review the timeline.
so what will be in case if we need to do it in nx
Trouble with this approach is that is doesn't give ability to independently set the boss hole diameter from the Web thickness, so if you may have to adjust the hole afterwards again breaking the parametric workflow
My first thought would be to make a vertical sketch between both bodies, and then just extrude in both directions to the bodies. Would that not work?
This is what I would have done. If the interior surface is curved you could extend the sketch inside the object so they overlap.
@@neofitou No need to use this trick: you can place your sketch in the middle of the boss, and extrude one side to the face of the larger ring, one side to the face of the boss. Today the definition of "side" of an extrude is pretty flexible :D
In the place where you did the first extrusion (0:45), I would do it halfway, then from the plane of the pulled element I would do another extrusion. Problem solved
I'll never remember the steps to your final solution, but I'm definitely going to remember the select face and delete shortcut. Thanks! :)
sir try to make cam course step by step. tnx