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Inventor General Discussion

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220610
Posts: 22
Registered: ‎12-01-2012
Message 1 of 48 (1,341 Views)
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Inventor - Engraving on a sphere

1341 Views, 47 Replies
04-06-2013 12:57 PM

Hi,
I've been looking around and couldn't find a solution. I have a sphere which I'm able to project on a sketch of smaller circles which I'd like to engrave over it's surface, yet I want each of them to be perpendicular to the surface of the sphere in each point. Emboss doesn't do the trick, it just makes the engraving perpendicular to the plane.
Can someone please help?
Thanks!

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JDMather
Posts: 26,616
Registered: ‎04-20-2006
Message 2 of 48 (1,320 Views)

Re: Inventor - Engraving on a sphere

04-06-2013 03:17 PM in reply to: 220610

Can you attach the file here?

You might want to Split and Thicken or some other technique.

Please mark this response as "Accept as Solution" if it answers your question.
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220610
Posts: 22
Registered: ‎12-01-2012
Message 3 of 48 (1,303 Views)

Re: Inventor - Engraving on a sphere

04-06-2013 10:33 PM in reply to: JDMather

I currently have no access to the file, but the sketch below is a basic concept of how the other side of the shell should look like. It's basically a dome with lots of pipes penetrating perpendicular to the surface at each point of entry. 

I'm not sure I follow your trail of thought regarding use of the Split command. 

Thing is, if there was a way to apply the Extrude on a 3D sketch that would've solved it all, as the circles in the 3D sketch are projected on the phere and thus perpendicular to its surface, but all I get is "No visible adapative sketches".

Any thoughts?

 

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JDMather
Posts: 26,616
Registered: ‎04-20-2006
Message 4 of 48 (1,279 Views)

Re: Inventor - Engraving on a sphere

04-07-2013 05:43 AM in reply to: 220610

220610 wrote:

I currently have no access to the file, ..., as the circles in the 3D sketch are projected on the phere and thus perpendicular to its surface,

Any thoughts?

 


I will wait for the file.  Circles are 2D (planar) by definition.
Sounds to me like you need to convert them to 2D sketches and Extrude.

Please mark this response as "Accept as Solution" if it answers your question.
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Contributor
220610
Posts: 22
Registered: ‎12-01-2012
Message 5 of 48 (1,271 Views)

Re: Inventor - Engraving on a sphere

04-07-2013 07:13 AM in reply to: JDMather

First, thanks for your help!

 

Here's the file, the inner shell sketch (3D) should be holes, and the outer shell sketch should be pipes, both should be perpendicular to the surface of the cap. It's driving me nuts as I'm sure there's a way to do it.

 

Thanks again!

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JDMather
Posts: 26,616
Registered: ‎04-20-2006
Message 6 of 48 (1,264 Views)

Re: Inventor - Engraving on a sphere

04-07-2013 08:08 AM in reply to: 220610

Projecting a 3D sketch onto sphere as you have does not result in circles.

 

Imagine you were drilling those holes on a drill press.

How would the centerline axis for drilling be set up?

 

You have two rows of holes in Projection 9. 
Will those holes be drilled with parallel axis or will axis point to common center?

Please mark this response as "Accept as Solution" if it answers your question.
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Autodesk Inventor 2014 Certified Professional
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Certified SolidWorks Professional
Inventor Professional 2015 64-bit
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Contributor
220610
Posts: 22
Registered: ‎12-01-2012
Message 7 of 48 (1,260 Views)

Re: Inventor - Engraving on a sphere

04-07-2013 09:44 AM in reply to: JDMather

You're right, I haven't noticed that but around the edges they do stretch.

The centerline (if I understood you correctly) would run from the edges to a common center, (two centerlines, one for each row). I thought  about creating a plane perpendicular to the point on which I want to create the circle, but this means a lot of planes...

Hope I understood you correctly

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JDMather
Posts: 26,616
Registered: ‎04-20-2006
Message 8 of 48 (1,254 Views)

Re: Inventor - Engraving on a sphere

04-07-2013 09:55 AM in reply to: 220610

Most likely can be created with a Circular Feature Pattern depending on your true design intent.

Please mark this response as "Accept as Solution" if it answers your question.
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Contributor
220610
Posts: 22
Registered: ‎12-01-2012
Message 9 of 48 (1,250 Views)

Re: Inventor - Engraving on a sphere

04-07-2013 10:22 AM in reply to: JDMather

I've used the circular pattern to make the holes that are on both sides, and then I've deleted some so maybe I'll put them back, not sure yet. Still, I can't define them as holes, and I can't create the big circle (inside of the cap) as an engraving.

Nor does it solve the two rows outside where the pipes pentrate the cap as well. How can I define the holes for the pipe as perpendicular to the surface? 

 

Thanks!

Contributor
220610
Posts: 22
Registered: ‎12-01-2012
Message 10 of 48 (1,237 Views)

Re: Inventor - Engraving on a sphere

04-07-2013 12:32 PM in reply to: JDMather

I'm sorry but I'm still not sure how using a circular pattern helps...

Disregarding several holes which can be cancelled due to their distortion in projection, the question of how to create a hole on a surface of the sphere remains (without creating a work plane of course). Also true regarding the embossing of the big inner circle.

I'll appreciate any help.

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