topic Re: Cut corner off of rectangle in sketch in Fusion Design, Validate & Document Forum

Cut corner off of rectangle in sketch

fchorney — Fri, 05 Jun 2020 02:27:10 GMT

Hi! I'm really new to Fusion360 and this kind of designing (usually use OpenSCAD), and I'm having an issue that I would assume is quite common but I can't for the life of me figure out the solution to. I've been searching for about 30 minutes now to no solution.

If you take a look at this design document: https://image.micros.com.pl/_obudowy_auto/rys.iecgm.png
I am trying to design the bottom right inlet flange.

I have attached what I have so far, but I can't figure out how to cut off the top left/right corners off of the rectangle. I've tried drawing a line, but then can't figure out how to constrain it properly.

Can anybody lend a hand? I would really appreciate it. Thanks!

Re: Cut corner off of rectangle in sketch

jhackney1972 — Fri, 05 Jun 2020 19:56:45 GMT

Your Fusion 360 model is not attached. You said you included it but it is not in your post.

Re: Cut corner off of rectangle in sketch

fchorney — Fri, 05 Jun 2020 20:02:16 GMT

Oh sorry, I meant I included an image of what I had so far. I think I figured out what I needed to do, but I will upload my f3d file anyway in case anyone ever comes across this.

My solution was to add some Points along the rectangle and used the Coincident constraint to tie the angled corner lines to the points, then I set dimensions on the points for how far away they were from the top or side line of the rectangle. This seems to end up giving me what I want when I go to extrude the part.

Re: Cut corner off of rectangle in sketch

laughingcreek — Fri, 05 Jun 2020 20:20:55 GMT

I made this screen cast, but I see you've worked things out. I'll post it any way

https://knowledge.autodesk.com/community/screencast/b93c6587-2a08-49bb-b11e-70f3ad449b2c

Re: Cut corner off of rectangle in sketch

etfrench — Fri, 05 Jun 2020 22:10:56 GMT

As @laughingcreek shows in his screencast, creating the coincident points is not necessary. The angled line can be drawn anywhere in space (on the sketch plane), then constrained and dimensioned to its final position. You can use linear dimensions for X and Y, or in combination with an angle dimension.

When you have symmetric geometry it's usually best to mirror the geometry instead of dimensioning/constraining both sides.

Re: Cut corner off of rectangle in sketch

fchorney — Fri, 05 Jun 2020 23:12:36 GMT

Oh very interesting. Thank you both! This is all really good information 🙂