Chamfer a hole

Leggy

hi all
I'm trying to chamfer this oval shaped hole , anyone have any idea how to do it, I'm looking at a 2mm chamfer
thanks Dean

SC1001 1%22 upper3~~.skp

nlipovac

I try using Curviloft, made offset of 200 on the flat side, and made a tube.
Intersect with a curved surface.
Create a copy of your curve on a curved surface, and copy the curve into an object, but on an orthogonal axis.
Delete current curve and after that I used Curviloft.
https://sketchucation.com/plugin/1175-curviloft

My try

Leggy

wow impressive
I have curviloft, could you do a tutorial to show me how you do it
thanks Dean

nlipovac

Well, I was wrong!
That chamfer should follow a curve and my idea of just offsetting the hole on the flat side is wrong.
I will try and make a gif today by using Tools_On_Surface and Curviloft and post it today.

Dave R

If this part was being created out of metal, what method would you use to chamfer the edge of the counterbore?

nlipovac

Hi, here is GIF in which I use ToolsOnSurface and Curviloft.
I made it too big, first time creating one so this one I upload to my cloud service:
https://1drv.ms/u/s!AkMAr9Me_-ODgYg5gAhaz5zX3bg45Q?e=oAgoRF

What I did is recreate that portion with more segments on a curved surface to get a more smooth transition from a high count of segments on the hole to fewer segments on a curved surface.
Hope it helps, maybe BOX or Dave gets something better.

MyTry

Box

Nice Gif nlipovac, one thing, you may not need tools on surface as the second ring is also a circle so you could start with a double tube. I'd have to try it to be sure though.

I, like Dave, am waiting for an answer to Dave's question, without knowing the actual method for making the chamfer in real life it is pretty hard to model it. A normal countersink tool wouldn't work, is it hand done with a dremil, cast, etc... the tool/method tells you what shape it can be.

Leggie

Hi thanks for all the tips
I’m 3d printing the parts, they are special clips for holding parts to boat stanchions
There are 39 parts to the set

Leggie

Hi how do you open the file

nlipovac

@leggie said:

Hi how do you open the file

If you are talking about mine, it is the 2017 version of Sketchup.

My_Try

Leggie

I managed to open it through one drive
Nice piece of work
Thanks Dean