Noob needs help. - mapping a sketch to a hemisphere..

Jul 24, 2006 2 Replies
S

Hi,



Im not sure my terminology is correct, but will try and describe what I need to do as best as possible.



I have a hollowed hemisphere, with a wall thickness of 10mm, I wish to cut a pattern through the face of this, but I need the edges of the pattern that will form the cut to be at an angle (coinciding with the centre of the hemisphere) rather than vertical. Is there a way to map a sketch to the surface of my hemisphere, so I can just cut-extrude my pattern through the hemisphere?



Cheers, Scott.



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M

You might be tempted to use the Wrap command, which will do what you ask, but only on cylindrical and conical surfaces.

You're probably limited to a projected curve, split line or trim, all of which do a straight projection rather than a wrap. Here's one thing I'd try to get a radial cut:

- make an offset surface of the outside of the hemisphere at 0 distance

- use your sketch to trim the offset surface

- insert, cut, thicken

There are a lot of possible problems, but that's one place to start.

snipped-for-privacy@gmail.com wrote:

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R

I would take the following steps:

1) Draw a 3d sketch from the origin of your sphere to the point you want to be the center of your cut profile. 2) Make a plane at the endpoint of that line using the "normal to curve" option. 3) Sketch your cut profile on your new plane 4) Make a sketch of a single point at the origin and create a cut loft from your previous sketch to this point..

This should work for most simple profiles.

snipped-for-privacy@gmail.com wrote:

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