o-ring groove

[Anonymous]

What command do I use to place an O-ring groove on a shaft as shown in the attachment? I've tried different methods unsuccessfully.

[Anonymous]

EMBOSS

[Anonymous]

Instead of doing an extrude cut, use Emboss and wrap to face. This will give
you the result you want, but may prove difficult to accurately machine.

Derek


wrote in message news:5592159@discussion.autodesk.com...
What command do I use to place an O-ring groove on a shaft as shown in the
attachment? I've tried different methods unsuccessfully.

[Anonymous]

Thanks gents, that was simpler than I expected. Now the machining and programming aspect will most likely be a nightmare. I suppose it would require a multi axis machine.

[robvacsax]

here's how i did it
IV10sp3a

Rob
(unzip and pull down EOP marker)

[robvacsax]

emboss causes an undercut, very impracticle. see preivous post
Rob

[Anonymous]

Well I guess if there was no emboss command there are alternatives. Can you machine it? Any machining expert advise would help before I make a drawing and give it MFG and they look at me with three heads. I'm designing a custom valve.

[robvacsax]

but impossible to machine ;(

[Anonymous]

Its not impossible to machine. Swagelok did it.Look at the Jpeg I posted in the first message.

[JDMather]

What version of Inventor are you using?
The only information needed for the CNC programming is the centerline path for the tool. (There are also special purpose manual machines that are just for creating grooves like this that the operator only needs to know the size of the groove.)

For CNC coding do a 3D sketch and Project with wrap. You may or may not need to split the face.
For visual purposes you could sweep a circle - but this only gives correct geometry if the ball end mill doesn't go below the ball radius. For rectangular sided slots the modeling process is much more difficult.
http://home.pct.edu/~jmather/content/DSG322/Inventor%20Tutorials/Inventor%2011%20Tutorial%2011.pdf

[Anonymous]

I would do a 3D Sketch, then sweep a circle profile.

Here's a procedure from my book:

1. Create a simple circle sketch, anchor to part origin centerpoint
2. Create a work axis and a tangent workplane
3. Create a circle, anchor and dimension
4. In 3D sketch, select Project Curve to surface. Pick surface, then the
circle.
5. Create workpoint using origin plane and curve,
6. Create New Sketch using the same origin plance.
7. Create a circle on the workpoint. Dimension and anchor.
8. Sweep the cut.

An R11 example is attached. This procedure woorks in previous versions as
well.



--
Dennis Jeffrey, AICE, MICE
260-399-6615
Instructor/Author/Sr. App Engr.
AIP 11SP2, AIP 2008
HP Pavillion Zv5000 (Modified)
Geforce Go 440, Driver: .8185, 2GB RAM
XP Pro SP2, Windows Classic Theme
http://www.design-excellence.com
wrote in message news:5592159@discussion.autodesk.com...
What command do I use to place an O-ring groove on a shaft as shown in the
attachment? I've tried different methods unsuccessfully.

[Anonymous]

Sorry, I wizzed throught the project to quickly.. select Wrap in the 3D
sketch - Project to Surface.... BIG difference. But, you can edit my 3D
sketch to fix it... 🙂

--
Dennis Jeffrey, AICE, MICE
260-399-6615
Instructor/Author/Sr. App Engr.
AIP 11SP2, AIP 2008
HP Pavillion Zv5000 (Modified)
Geforce Go 440, Driver: .8185, 2GB RAM
XP Pro SP2, Windows Classic Theme
http://www.design-excellence.com
"Dennis Jeffrey" wrote in message
news:5592314@discussion.autodesk.com...
I would do a 3D Sketch, then sweep a circle profile.

Here's a procedure from my book:

1. Create a simple circle sketch, anchor to part origin centerpoint
2. Create a work axis and a tangent workplane
3. Create a circle, anchor and dimension
4. In 3D sketch, select Project Curve to surface. Pick surface, then the
circle.
5. Create workpoint using origin plane and curve,
6. Create New Sketch using the same origin plance.
7. Create a circle on the workpoint. Dimension and anchor.
8. Sweep th
e cut.

An R11 example is attached. This procedure woorks in previous versions as
well.



--
Dennis Jeffrey, AICE, MICE
260-399-6615
Instructor/Author/Sr. App Engr.
AIP 11SP2, AIP 2008
HP Pavillion Zv5000 (Modified)
Geforce Go 440, Driver: .8185, 2GB RAM
XP Pro SP2, Windows Classic Theme
http://www.design-excellence.com
wrote in message news:5592159@discussion.autodesk.com...
What command do I use to place an O-ring groove on a shaft as shown in the
attachment?
I've tried different methods unsuccessfully.

[mcgyvr]

Part looks cast.
To duplicate (exactly) in real world you need a 5 axis mill.
The mill needs to angle to keep perp. to the surface to keep even pressure on the oring all the way around
Or the part moved/rotated while milling the groove.

[Anonymous]

JD, I not sure if I understand you correctly. Are you explaining the method to correctly model the O-ring groove on the shaft? If I "wrap face" I get different geometry than when its unchecked. Please clarify. Thanks -Bill

[Anonymous]

Yes, you would need a five axis machining center, or least a three axis with
a rotating table. I thought that was understood.

--
Dennis Jeffrey, AICE, MICE
260-399-6615
Instructor/Author/Sr. App Engr.
AIP 11SP2, AIP 2008
HP Pavillion Zv5000 (Modified)
Geforce Go 440, Driver: .8185, 2GB RAM
XP Pro SP2, Windows Classic Theme
http://www.design-excellence.com
wrote in message news:5592321@discussion.autodesk.com...
Part looks cast.
To duplicate (exactly) in real world you need a 5 axis mill.
The mill needs to angle to keep perp. to the surface to keep even pressure
on the oring all the way around
Or the part moved/rotated while milling the groove.

[Anonymous]

Here's a screenshot of the model



http://www.design-excellence.com
"Dennis Jeffrey" wrote in message
news:5592314@discussion.autodesk.com...
I would do a 3D Sketch, then sweep a circle profile.

Here's a procedure from my book:

1. Create a simple circle sketch, anchor to part origin centerpoint
2. Create a work axis and a tangent workplane
3. Create a circle, anchor and dimension
4. In 3D sketch, select Project Curve to surface. Pick surface, then the
circle.
5. Create workpoint using origin plane and curve,
6. Create New Sketch using the same origin plance.
7. Create a circle on the workpoint. Dimension and anchor.
8. Sweep the cut.

[Anonymous]

That looks the way to do it. Its a bit more work than a simple sketch and emboss/ wrap to face. That gives you square edged when viewed from the side and significantly different geometry. We would need radial for the ball endmill path.

[Anonymous]

This was a 5 minute procedure... not that dificult. If you had already
created the sketch to extrude, you are halfway there. Its not a big issue,
just a different command.

--
Dennis Jeffrey, AICE, MICE
260-399-6615
Instructor/Author/Sr. App Engr.
AIP 11SP2, AIP 2008
HP Pavillion Zv5000 (Modified)
Geforce Go 440, Driver: .8185, 2GB RAM
XP Pro SP2, Windows Classic Theme
http://www.design-excellence.com
wrote in message news:5592461@discussion.autodesk.com...
That looks the way to do it. Its a bit more work than a simple sketch and
emboss/ wrap to face. That gives you square edged when viewed from the side
and significantly different geometry. We would need radial for the ball
endmill path.

[Anonymous]

i got it. Your expanation was clear and straight forward. I'm up to dimensioning the IDW now.
By the way Dennis; how do I make the O-ring this shape and an independent part? I used the same method but the sweep was joined instead of cut and I cant suppress the extrusion of the shaft.

[JDMather]

Make the 3D sweep path sketch and the 2D sweep profile sketch visible and save the file.
Start a new ipt.
Exit sketch mode.
Derived Component the shaft bringing in only the 2 sketches (you could also include the shaft as Body as Work Surfaces if desired for visual purposes, you can turn off the visibility).
Sweep
Save
Once you have the derived sketches they no longer need to be visible in the master file.
Any changes you make to the master file will be updated in the derived file. You can suppress or break the link to the master if desired.