topic Re: Generate dynamically sized perforation in Fusion Design, Validate & Document Forum

Generate dynamically sized perforation

Anonymous — Sat, 14 Jan 2017 19:18:37 GMT

Hello guys!

I am designing a lightweight reinforcement and I would like to add rounded cutouts to it.

The situation is following - In the picture there is a side-view of the body (solid).

I would like to add perforation (cut holes) as it is on the second picture:

The circles have to be in the centre of the target body with constant gap between each circle, its size adjusted according to the target body.

My idea was to create first cutout in the centre of the target body and then use pattern command to generate the rest of the cutouts. The thing was that I was not able to make the cutouts dynamically resize to match the size of the target body. The all cutouts were the same size.

What is the correct workflow to achieve this in the Fusion 360?

Thanks in advance

Re: Generate dynamically sized perforation

TheCADWhisperer — Sat, 14 Jan 2017 19:36:32 GMT

Are the edges for distance "A" arcs and lines or are they splines?

Re: Generate dynamically sized perforation

Anonymous — Sat, 14 Jan 2017 20:00:41 GMT

I am including a picture of the result to make the situation easier to imagine. (Sorry for quality)

Re: Generate dynamically sized perforation

TrippyLighting — Sat, 14 Jan 2017 20:37:13 GMT

It's not difficult to imagine what the end result is supposed to be, however the question is if the curves are splines or a combination of arcs and lines.

If you used arcs and lines this is relatively easy to do, however currently splines in Fusion 360 do not allow for a tangency constraint to a circle, which makes it tricky.

Re: Generate dynamically sized perforation

TheCADWhisperer — Sat, 14 Jan 2017 20:56:13 GMT

From that image it appears the answer would be splines. Oh well, you are going to have a lot of construction geometry.

BTW - if you are on Windows OS ask Cortana about built in Windows Snipping Tool.

I suspect Mac OS has something similar for grabbing screen captures.

Re: Generate dynamically sized perforation

Anonymous — Sat, 14 Jan 2017 20:56:48 GMT

The edges are splines.

Re: Generate dynamically sized perforation

TrippyLighting — Sat, 14 Jan 2017 20:58:49 GMT

@TheCADWhisperer wrote:

I suspect Mac OS has something similar for grabbing screen captures.

Yes, Shift-Command-4.

Re: Generate dynamically sized perforation

jeff_strater — Sat, 14 Jan 2017 23:09:18 GMT

This is as close as I can come. It's not perfect, by any means.

First, you will need spline fit points everywhere you want a perforation, because you can only dimension to a spline fit point. Also, you cannot, today, dimension to the tangent points of a circle (coming, soon!), so you have to do some math to get the spacing between the circles and the splines:

Model is attached.

Jeff