chamfer a hole

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chamfer a hole

Postby Leggy » Thu Apr 08, 2021 5:56 pm

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
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Re: chamfer a hole

Postby nlipovac » Thu Apr 08, 2021 7:35 pm

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
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Re: chamfer a hole

Postby Leggy » Fri Apr 09, 2021 2:58 pm

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

Re: chamfer a hole

Postby nlipovac » Mon Apr 12, 2021 7:46 am

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.
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Re: chamfer a hole

Postby Dave R » Mon Apr 12, 2021 11:59 am

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

Postby nlipovac » Mon Apr 12, 2021 5:49 pm

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_-ODgYg5gAh ... Q?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. :thumb: :fro:
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Re: chamfer a hole

Postby Box » Tue Apr 13, 2021 3:04 am

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.
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Re: chamfer a hole

Postby Leggie » Tue Apr 13, 2021 7:18 pm

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
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Leggie 
 

Re: chamfer a hole

Postby Leggie » Wed Apr 14, 2021 2:11 am

Hi how do you open the file
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Re: chamfer a hole

Postby nlipovac » Wed Apr 14, 2021 6:50 am

Leggie wrote:Hi how do you open the file


If you are talking about mine, it is the 2017 version of Sketchup.
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Re: chamfer a hole

Postby Leggie » Wed Apr 14, 2021 2:57 pm

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