topic Re: Fillet question in Fusion Design, Validate & Document Forum

Fillet question

Art5 — Mon, 19 Aug 2019 15:10:58 GMT

I'm working on a stamping die, and I wanted to put some large fillets around the edge of the die, but it will only let me go up to a certain radius before it gives me an error. Can someone help me understand why fusion won't let me put a fillet bigger than 6mm? Ideally, I was hoping to put around a 25mm fillet to help the material flow into the die. As always, any and all help is greatly appreciated.

6mm fillet works7+ m fillet does not

Re: Fillet question

jeff_strater — Mon, 19 Aug 2019 15:14:08 GMT

Fillet does have limits to what it can do, primarily driven by the geometry of the edges you are trying to fillet. Areas of high curvature, and "near tangencies" can all cause fillet to fail. If you share your design here, we can take a look at it.

Re: Fillet question

Art5 — Mon, 19 Aug 2019 15:21:14 GMT

Here ya go

Re: Fillet question

jeff_strater — Mon, 19 Aug 2019 16:27:00 GMT

thanks, @Art5 . This design looks slightly different than the one in the above image - it looks like we have only part of the pocket:

or, am I missing something? Thanks.

Re: Fillet question

TrippyLighting — Mon, 19 Aug 2019 16:43:35 GMT

Past approximately 6.7 the fillet starts failing because it basically start collapsing.

So you need to make the vertical fillet larger.

Re: Fillet question

Art5 — Mon, 19 Aug 2019 17:47:37 GMT

@jeff_strater We are a prototype shop, the designs are proprietary, so I'm not allowed to share the full die. I did get permission to share partial designs, so I cut the die in half. I couldn't get the fillet to work on the partial die I provided either.

Re: Fillet question

Art5 — Mon, 19 Aug 2019 17:52:12 GMT

The "bottom" of the die is built to part, I can't change the design as it will change the shape of the part.

Where part is must remain the same, I can change my runoff to a certain extent though.

Re: Fillet question

wmhazzard — Tue, 20 Aug 2019 00:08:01 GMT

Take a look at this file to see if it works for you.

Re: Fillet question

laughingcreek — Tue, 20 Aug 2019 04:20:06 GMT

another possibility if you can't change the geometry near the bottom would trim out some of the surfaces at the top and loft a fillet like surface at the top. example attached.

Re: Fillet question

Art5 — Tue, 20 Aug 2019 11:02:01 GMT

I'm afraid that while this is the size of fillet I was hoping to achieve, this particular solution doesn't quite work for me since the part no longer matches up with the die in a couple of places.

As you can see, in these locations the die either interferes with the part or doesn't contact it

Re: Fillet question

Art5 — Tue, 20 Aug 2019 11:04:21 GMT

@laughingcreek This does appear to be a viable solution, although I'm not entirely sure how you achieved it.

Re: Fillet question

michallach81 — Tue, 20 Aug 2019 11:26:54 GMT

Re: Fillet question

Art5 — Tue, 20 Aug 2019 12:31:10 GMT

@michallach81 Success!!! This is exactly what I was trying to achieve! Thanks a million!1" Radius Fillet successfully created!