how to make hole with flat bottom?

[Cris-Ideas]

It seems easy but in fact it turns out to be difficult if not impossible.

I have a irregular surface and I need to drill (model) many holes that start on a single plane and finish on the irregular surface but in a way so hole bottoms are flat (perpendicular to hole axis) and they do not go beyond this irregular surface. So individual hole depth will be different and it needs to be such so it only touches irregular surface in one point.

Does anyone have any idea how to get this done?

Cris.

[g-andresen]

Hi,

Please show a corresponding hand sketch to avoid possible misunderstandings.

günther

[Cris-Ideas]

here you have a sample model and a video comment.

Cris.

[Lennart_Losjo]

Hi.

Interesting.

Do you want to have just a surface that contains the holes also, sp no thickness anywhere?

[TheCADWhisperer]

Contact Sets.

Combine-Subtract

[Cris-Ideas]

No I want holes

in the video there is actually a model of the opposite of what I want, as I have model the hole as a body and material this hole would be in is not there in the model at all.

This was to be able to show more easily how the hole should end.

So what I want is holes just where this solid is in my model if you ass material all around it.

This is actually coming from having to make step holes from face of the stock to this surface. But I am not able to drill with one tool so I need first to do 13mm and than 0,9mm (vacuum mould).

But I am having problems not being able to easily determine depth this 0,9mm holes starts.

And I have like xx hundreds to do so not something I am able to do on case by case basis.

Cris.

[Cris-Ideas]

@TheCADWhisperer 

how exactly did you make that?

In principle this is some solution, but I am not able to follow it (not so experienced in fusion).

Cris.

[TheCADWhisperer]

It was a quick and dirty attempt.

Place cylindrical components in desired positions above the surface.

Turn on All Contacts (under assembly).

Go to perpendicular view.

Drag each down to contact with the surface.

Create the part to be drilled.

Combine subtract.

Now that I have a basic understanding of the Design Intent - I will try to create a simplified, more robust technique...

...back in a bit...

[TheCADWhisperer]

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@Cris-Ideas wrote:

And I have like xx hundreds to do so not something I am able to do on case by case basis.

 Not sure there is an easy button solution.

The pins in Attached can be slid to contact and the Combine-Subtract.