Creating an equal depth extrude on a profile

[formsR28H6]

Can't figure this out, I have a profile and I would like to create a 1mm deep extrusion / groove to accept an O ring.

I have tried selecting the top profile as the start, but it wont allow me to do it.

 

I'm sure there's an easy way to do this ?

 

[etfrench]

Select the face as the Start object if you want the bottom of the groove to match the face:

[formsR28H6]

Thanks ever so much for helping, but that was the first thing I tried before posting here.

It says that the profile is outside the body, but it is not.

I also tried to use the emboss method but that produced very strange results.

 

[etfrench]

Try Extrude/To Object as a new body, then move it down the desired depth and Combine/Cut it from the first body.

If that doesn't work, attach your file to the thread.

[formsR28H6]

Thanks, attached is the file.

I think it may have something to do with the profile seems to be 2 profiles with a join seam ?

[g-andresen]

Hi,

something like this?

günther

[formsR28H6]

Thanks very much.

The video is compressed / blurred and so it's a bit difficult to see the text for the menus / etc selected, but I kind of understand that you are using sweep (which I have never used before), but does that create a 1mm deep slot down from the profile surface, as it looks from the video that the depth of the groove is deeper where the profile curves up ?

As this is for a 2mm thick O'ring, the slot depth needs to be 1mm down from the plane all the away around.

Is there a way to remove the seam and combine the 2 seperate planes into one ? - if so then I may be able to just use a simple extrude from object where object would be that single plane without seam ?

[formsR28H6]

@g-andresen - I was able to follow your guide, thanks.

But it does appear to create a deeper groove at the back (1.297mm), I thought it might be an optical illusion but it was not.

[davebYYPCU]

What do you really want.

I managed a 1mm deep cut, normal to the face we refer to, using your 10mm circle (right view).

Now upon checking, you should be able to see that the inclined angled arrows are 1mm deep, but the vertical extruded cut, is deeper on both sides.  Thats the geometry as supplied / requested.

Looks wrong but should work.

Might help...

[formsR28H6]

Really appreciate your help.

As this is an Oring groove, and the curved profile mates with another surface, I am looking for even compression between this part and the part it mates with using a 2mm thick Oring.

Unless I did something wrong, the depth from the profile to the bottom of the groove is correct at 1.0mm but too deep at 1.4mm.

What I am looking for is a 1mm deep groove from the profile plane downwards, so that the 1.3mm dimension below is 1.0mm and is the same all the away around to enable the correct compression of the Oring.

Sorry if my original description did not make that very clear.

 

[davebYYPCU]

Double check my sketch.  The curved face, purple curve, high side, does project through the Oring centre point.  Correct?

The problem as I see it, the squish is a vertical downwards force, and the high side curved face will push the Oring away from any rod, like a wedge, when the left hand wall is vertically cut.

A quick demo you can do, base model, 

Create > Pipe , circular 2mm solid, select the supplied face hole circumference, Fusion will preview a cut, say ok.  The result is a concave curve, on the high side face, and the Oring will not move away from the rod.  Still does not fix the downward squish factor.

Might help….

[formsR28H6]

OK, thanks for your help, it is the downward squish compression that is critical, without that it will leak.

It is a 3 way seal:

pipe -> this part

This part female profile > mating part male profile.

If it was simply sealing against the pipe then I could just move the groove to the other end of the part, that would be very simple 🙂

I will use silicon to seal the male and female profile instead and add an Oring groove at the other end of this part.

Not as elegant and means that this part and it's mating case will be permenantly attached, but I need to move forward.

Thanks so much for your patience.

[etfrench · Accepted solution]

Here's the results by doing the extrudes from object in several parts and deleting several faces:

[formsR28H6]

@etfrench - exactly what I was looking for and in works perfectly.

I never considered splitting it into 2 extrusions and was focussed instead on trying to remove the seam and merge them into one.

Thanks very much.

And thanks also for the other suggestions and time that you put into it, much appreciated.

[johnsonshiue]

Hi! There are multiple ways to create the groove. Here is another solution by using a Surface Modeling technique (repurposing existing geometry without a sketch).

Many thanks!

[etfrench]

Changing the order of operations will make this easier.  Make the first extrude the entire cylinder and cut the center as the last step. 

It's also a good practice to add fillets and chamfers at the end instead of in the middle.  It makes it easier for Fusion to do the calculations.

[lange_18]

but how do you do it on a ball , i have make a gear knob and with the gears on it but if i extrude it some nubers wil be to deep and i want everthing the same depth.

[g-andresen]

Hi,

please start a new topic and share the file

File > export  > save as f3d on local drive > attach to post

günther

[etfrench]

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@lange_18 wrote:

but how do you do it on a ball , i have make a gear knob and with the gears on it but if i extrude it some nubers wil be to deep and i want everthing the same depth.

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Emboss/Deboss