Create Groove on a curved path

[Zoltan3D]

Hello everyone,

I use Fusion since 6 years, but it's the first time i'm really stuck ....
I want to create some custom glasses, and I need to make a groove for the lens itself.

The problem is : I don't have any idea how to make a V shapes groove inside a not flat and not round circle 😞
Anyone have an idea how to make this proprely ? and if possible parametricly (to be able to scale up or down the glasses)

Normally I cut the piece in half and make a sketch of the groove and do it along a path, but here, i really don't have idea how to cut an object like this perfectly in half 

If you can help me I will really appreciate ! 

Thanks

[jhackney1972]

I created a V-Groove in one side, is this what you are looking for?  Model is attached.

[Zoltan3D]

Hi, 
Thanks to try to help me , but first i don't know how you did this, and second : it's ugly as a hell ....
Sorry to say that, but it's all but not a solution ! Just look at this "groove"

It's not even a groove, it looks like a fake short thread

[wersy]

I did extend the profile a bit.

[Zoltan3D]

It's really need to be perfect, not an approximation, the groove size dosent really matter, it need to be same on all the frame.

But I don't really need someone to make me the groove, but explain me how to achieve it 😛 

Thanks

[jhackney1972]

Are you going to actually cut the lens to have the flat area on the sides, a different size no less?

[Zoltan3D]

No, I have to have the groove all the way, even where it's flat.
Once the glasses are printed, the optician places them in his machine, which with a point will feel the bottom of the groove all around and will automatically cut the shape of the glass. This is the normal process for any optician, they are the ones who cut the lenses in relation to the frame

[TrippyLighting · Accepted solution]

I usually don't work on models that have had their timeline stripped.

I attempted to offset the outermost surface and then untrim it. that failed for some strange reason. 

So I untrimmed that surface in another CAD application so I can demonstrate a proper workflow. I would hope if you come here for help again you have the courtesy not to dumb a model down for our "benefit"! 

Anyway the workflow is demonstrated in the attached model:

[jhackney1972]

Peter,

I learned a new process today, thanks!

[Zoltan3D]

Thanks you a lot, 

I really want to learn to do it, in any case your groove are not at good dimensions, but now I know how to do with your help 😛 

Thanks you a lot, because it's really the first time i'm really stuck luck this on a model ... because normally there was many way in Fusion to achieve the same goal... but I never found a proper way to make groove on a not round, not flat, not symetrical object inside part 😛

I just see your file and I will never have thought of my life to go through surfaces to do this: p really super method! I really learned a new tip that will serve me in the future, and I suddenly hope for other people too

[Zoltan3D]

I still find it a shame that in parametric 3D modeling software there is no easy tool for giving an inner groove by following a surface like that

[tanwinghoe1983]

Very innovative method. I wonder whether this produces a constant v groove cross section along the path. 

I'm thinking of using an offset surface to create a split line halfway across the thickness of the frame to create a path for a sweep.

[TrippyLighting]

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@tanwinghoe1983 wrote:

Very innovative method. I wonder whether this produces a constant v groove cross section along the path. 

I'm thinking of using an offset surface to create a split line halfway across the thickness of the frame to create a path for a sweep.

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It does indeed create a constant cross section. 

[tanwinghoe1983]

Hi, just for my learning purposes here. Is there a reason why the swept cut solution by wersy does not work for you ?

[Zoltan3D]

Because it not make a full groove, especially in the flat part, and explain me how to cut properly a curved not flat,not symmetrical object ☺️

[TrippyLighting]

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@Zoltan3D wrote:

Because it not make a full groove, especially in the flat part, and explain me how to cut properly a curved not flat,not symmetrical object ☺️

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The groove in @wersy 's model is consistent and the workflow is perfectly fine. All it would have taken to complete the groove on the flat part is a loft between the ends of the sweep. Dead simple! 

[wersy]

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@TrippyLighting  schrieb:

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@Zoltan3D wrote:

Because it not make a full groove, especially in the flat part, and explain me how to cut properly a curved not flat,not symmetrical object ☺️

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The groove in @wersy 's model is consistent and the workflow is perfectly fine. All it would have taken to complete the groove on the flat part is a loft between the ends of the sweep. Dead simple! 

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Yes, so simple - but I wouldn't have thought of this obvious idea.
Thanks.

[TheCADWhisperer]

@Zoltan3D 

One example - see Attached.

I didn't take the time to verify that it is actually 100% correct.