topic Re: Fillet not making perfect half circle in Fusion Support Forum

Fillet not making perfect half circle

tyroneXJ9TF — Wed, 09 Mar 2022 17:35:14 GMT

The height of this part is 2.05625" and width is 4.1125". I put a 2.05625" fillet on the edges but it doesn't make a perfect half circle.

What am I missing?

Re: Fillet not making perfect half circle

ryan.bales — Wed, 09 Mar 2022 17:51:31 GMT

Hard to say without seeing the design. You could try a full round fillet but the shape of the object looks tapered slightly.

Re: Fillet not making perfect half circle

tyroneXJ9TF — Wed, 09 Mar 2022 22:06:48 GMT

This is what the part looks like. The end with one outlet has a height of 2.05625" and the 4 outlet end has a height of 1.6". I am using a variable fillet.

You can see that the single outlet was extruded before the fillet was applied and is the same width as the middle body but slightly higher.

Re: Fillet not making perfect half circle

ryan.bales — Wed, 09 Mar 2022 22:10:50 GMT

I'm not able to see that from the image. Can you upload the design for us to look over? I'll be stuck speculating a lot without it. Full round might work but it cannot be variable.

Re: Fillet not making perfect half circle

jhackney1972 — Wed, 09 Mar 2022 22:23:33 GMT

If you do not know how to attach your Fusion 360 model follow these easy steps. Open the model in Fusion 360, select the File menu, then Export and save as a F3D or F3Z file to your hard drive. Then use the Attachments section of a forum post to attach it.

Re: Fillet not making perfect half circle

davebYYPCU — Wed, 09 Mar 2022 22:39:43 GMT

Fillet has done what you asked for. Fillet radius is normal to the Path.

The intersecting faces for that filleted area is elliptical at the duct face.

For a concise curved boundary between outlets on that model, you will need a sweep with Guide rail, or Loft.

Might help....

Re: Fillet not making perfect half circle

tyroneXJ9TF — Thu, 10 Mar 2022 00:26:05 GMT

Attached is the drawing.

Thanks

Re: Fillet not making perfect half circle

davebYYPCU — Thu, 10 Mar 2022 01:04:47 GMT

Split body the larger end, then Loft both ends together.

One way to get there, may not be what you want.

Might help....

Re: Fillet not making perfect half circle

TheCADWhisperer — Thu, 10 Mar 2022 14:54:21 GMT

@tyroneXJ9TF wrote:
Attached is the drawing.
Thanks

A drawing is 2D - that which is printed on a sheet of paper.

You attached a 3D model.

I made some changes to your design - see Attached...

First thing I noticed is that your Sketch1 was not fully defined or making use of obvious symmetry about the Origin...

Version 2 with different Loft weights and Fillet.

Re: Fillet not making perfect half circle

ryan.bales — Thu, 10 Mar 2022 16:20:50 GMT

I kept the straighter edges and leaned on surface tool to erase, patch and stitch. This is very close to the original shape.

Re: Fillet not making perfect half circle

tyroneXJ9TF — Fri, 11 Mar 2022 12:26:55 GMT

I need a variable fillet on the sides.
Thanks for the idea though. Being new to CAD this will help further down the road.

Re: Fillet not making perfect half circle

tyroneXJ9TF — Fri, 11 Mar 2022 12:27:53 GMT

Oh wow! Thanks

Re: Fillet not making perfect half circle

tyroneXJ9TF — Fri, 11 Mar 2022 12:35:24 GMT

The original issue is still there though. It's not as bad as it was at the start.

Thanks

Re: Fillet not making perfect half circle

davebYYPCU — Fri, 11 Mar 2022 13:02:18 GMT

I need a variable fillet on the sides.

Considering you can’t use a variable fillet for the result desired, do you have a plan B?

Re: Fillet not making perfect half circle

TheCADWhisperer — Fri, 11 Mar 2022 13:18:35 GMT

How will you manufacture the real part?

Stamped Metal?

Bent and soldered Metal?

Injection molded?

3D printed?

I would base my design on manufacturability as well as functionality.

Is flow important to you, do you intend to do flow tests?

What do the mating parts look like?

In isolation the design doesn’t reveal much information about intent.

Re: Fillet not making perfect half circle

tyroneXJ9TF — Fri, 11 Mar 2022 14:10:36 GMT

This part is to be injection molded. Some snap fits will also be put in place. One side of the part's snap fits will be the opposite from the other side as I am only making one part, aside from one part with the hooks and another with a loops. If that makes sense.

Re: Fillet not making perfect half circle

TheCADWhisperer — Fri, 11 Mar 2022 14:39:10 GMT

Will the snaps be on the inside or will they be on the outside?

What about Lips and Grooves for sealing?

Will you need the Lips?

Re: Fillet not making perfect half circle

tyroneXJ9TF — Fri, 11 Mar 2022 14:42:32 GMT

Snap Fits will be on the outside in these general areas. Evenly spaced.

Re: Fillet not making perfect half circle

tyroneXJ9TF — Fri, 11 Mar 2022 14:44:22 GMT

Saw that last question after my previous reply. Yes there will be a lip needed.

Thanks

Re: Fillet not making perfect half circle

TheCADWhisperer — Fri, 11 Mar 2022 15:02:33 GMT

Are you still going with the triangular planar face design rather than a more smooth flowing design?

(In my latest example - I used only one simple sketch.)

I should tie the Feature parameters to the sketch parameters so that everything updates on edits.