How to draw a box with different radii on edges and corners?

[roziSPZ56]

Hi all, Im very new at this and I've been trying to create a box that is 3x3" (76.2mm) with corner radius of 3/4in (19.05mm) but I want the box edges to have 5/16in (7.93mm) radius. Could someone advise the best way to achieve this?

Many Thanks!

[g-andresen]

Hi,

Please share the file.

File > export > save as f3d on local drive  > attach it to the post

günther

[roziSPZ56]

I created the box using sketch and applied the fillets to all the horizontal and vertical edges, which made the default corner radius, but I'd like the corner radius to be larger than the radius on the edges.

[HughesTooling]

Sketch a simple rectangle and extrude to the correct thinness. Then fillet, use selection sets so you can add the large fillet then the smaller ones in a second selection set.

Something like this.

[roziSPZ56]

I also tried creating a rounded corner first, but when I add the fillets the corner gets distorted. Here is the file for this.

Im completely new to this so I appreciate any help you could give me.

[roziSPZ56]

I tried that but it still doesn't give me a different corner radius. I need the same radius for all the horizontal and vertical edges, but a different radius for the corners. Like this

[HughesTooling]

You can get a setback corner but unfortunately Fusion doesn't give you any control over the radius used for the setback. PS. don't attach pictures, just paste them into your message.

[jeff_strater]

you cannot get a different radius at the corner with Fillet.  If you enable Setback corners, you can get this:

but, the radius is still the same.  To get an actual different radius there will require some surfacing magic.  Delete the corner patch, trim back all 3 adjacent faces, then fit a Boundary Patch to the corner.  The result will not be constant radius.  There may be other ways to do this, but none are coming to me at the moment.

here is what I got for just one corner:

model is attached, look at the timeline for more info

[HughesTooling · Accepted solution]

Here's what I came up with using the surface workspace. Not sure if this is correct as I can't quite picture a 19mm spherical corner into 7.93mm fillets.

[HughesTooling]

I see now that it's not too good! The stitch is distorting the surfaces quite badly.

Before stitch

After.

[roziSPZ56]

This looks like what Im after. Thank you so much!

[roziSPZ56]

.

[roziSPZ56]

@HughesTooling there is another way that someone advised