How can I wrap body "B" around the outside of body "A"? I am attempting to create the profile in the drawing below the screen capture.
Thank you in advance.
Jason
Wrap a body around a cylinder
@michallach81 wrote:Hi Jason, you need to show us more drawings of a part you like to recreate. First thing I can tell is, that if you would wrap body B around body A, in a section view straight line would be a curve.
Your attached section views, shows straight lines which mean you should rather cut cylinder with extrusion.
Michallach81,
Thank you for your reply. I am attaching two more drawings, this is all I have. I am trying to wrap this profile around the cylinder, then cut it out of the cylinder.
If these two drawings are to represent the same part then one of them is wrong.
If the cylider is created by rolling a
I suspect that these drawings were done in 2D CAD and that the person creating the draiwng did mot take thte time to draw the finished cylinders correctly.
Either way, you cannot just wrap a straight body around a cylinder in Fusion 360 like this. If you want that cut (gap) represented correctly you'l have to model a cylindrical/spiral object that can be cut out of that cylinder.
If these two drawings are to represent the same part then one of them is wrong.
If the cylinder is created by rolling a
I suspect that these drawings were done in 2D CAD and that the person creating the draiwng did mot take thte time to draw the finished cylinders correctly.
Either way, you cannot just wrap a straight body around a cylinder in Fusion 360 like this. If you want that cut (gap) represented correctly you'l have to model a cylindrical/spiral object that can be cut out of that cylinder.
Accepted solution
Hi Jason, drawings you've add are still not enough accurate. Not only the helix is shown as a straight line, we also missing some dimensions. As @TrippyLighting said, someone draw them probably in 2D, and I assume that he had some problems with drawing projection of a helix correctly. Conclusion is, that the section views are wrong.
How to create that part (if my assumptions are correct)?
@donsmac trick is nice but nothing like accurate, it may be usefull for CGI, concept modeling, organic shapes, but rather not for mechanical design (here's some of my advices on that: http://forums.autodesk.com/t5/post-your-tips-and-tutorials/making-smooth-surface-sketch-lines-for-3d... ). He uses a spline where we should use exact projection of a helix.
What's the difference. That gap we trying to get, serve as a slot for some pin, and that pin moves vertical. Helical shape asure that constant rotation of a cylinder will result in a constant move of a pin (linear function). Using a spline, will result in some accelerations and decelerations with constant rotation. Maybe it's not a big deal in this particular example, because it may fit tolerance we need, but in general you should try to find a way that is mathematically accurate.
In Fusion we don't have helix in sketches, so we will use Coil (with rectangular profile), and whole play is about figuring out heights an angles (revolutions), and some rotations (Move) afterwards.
Take a look
Ready part:
and flat outer surface (urolled in Rino 3D and imported back to Fusion):
Both files (cylinder and flat surface) I've attached down below. Cylinder file have a time line so you can investigate my workflow.
All,
My appologies, I uploaded the wrong image of the cam slot. No wonder everyone was telling me that it did not have enough information. Again so sorry for posting the wrong image.
Thank you michallach81. I appreciate the time you took to point me in the correct direction. I think I finished it correctly. fingers crossed.
