cutting cylinder
One way is to use 2 sketches and 2 revolves. First draw half of the cylinder then in another sketch draw a D shape for the cross section of the sphere, use constraints and dimensions to get the positions and sizes. Revolve the sketch of the cylinder then revolve cut he sketch of the sphere.
Mark
Mark Hughes
Owner, Hughes Tooling
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Here's a screen grab of what you need. I'll do a screen cast in a minute as there's some thing odd going on with the constraints for the D shape.
Mark.
Edit changed screen grab, found I'd made a mistake
Mark Hughes
Owner, Hughes Tooling
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@Anonymous wrote:
Hi Mark, thanks for your response. I have drawn everything and I think the only thing I could not succeed is aligning the D shape with the dots of the cylinder.
Probably that is my core problem from the onset.
In your picture below you have a couple of problems. 1 the diagonal line has a constraint to the midpoint of the top line of the rectangle. This will stop you adding the 22mm dimension. Just select the triangle constraint icon and delete. the other problem is the height of the rectangle should be the radius of the cylinder. I've done a screencast should be ready soon that makes it all a lot easier to follow.
Mark Hughes
Owner, Hughes Tooling
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Accepted solution
OK here's a screencast that shows how to make your part. At 2 minutes in I demonstrate a bug where the sketch of the D shape should be fully constrained but I can still drag it. @jeff_strater can you take a look at the file.
Mark
Mark Hughes
Owner, Hughes Tooling
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@Anonymous wrote:
Would it be also possible to do the same thing by sculpting?
This is not really something you'd use sculpt for unless you want to deform it in some way. Making it in the model work space makes it parametric so you can edit the sketches and the model will update. You can use the same sketches in the sculpt workspace to make the same part but the sculpt bodies are not linked to the sketches so edits to the sketch don't update the model.
Mark
Mark Hughes
Owner, Hughes Tooling
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@jeff_strater did anyone take a look at the file and screencast in post #8, there's a strange bug where the sketch should be fully constrained but I can drag part of the sketch, when I let the sketch go it snaps back into place!
Mark
Mark Hughes
Owner, Hughes Tooling
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Thanks for the reminder, @HughesTooling. It's been on my list to check out. Since I'm doing "Answer Day" today, that gave me an excuse to look at it.
I agree that this seems like a bug. When I tried this on my own, I definitely saw it the first time. But, when I went back to try again, I could not reproduce it. I'll keep looking at it, though, and once I found the magic sequence, I'll report the bug,
Jeff
Jeff Strater
Engineering Director
It seems to be something to do with using a full circle drawing the line across, constraining to the center point then trimming. When I made the same sketch by drawing the horizontal line 110mm long first and used a center point arc all the lines turned white.
Mark
Mark Hughes
Owner, Hughes Tooling
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