I would like to create a 3d sketch on a cylindrical surface but cant seem to get it to work. Tried a 2d sketch on a plane then wrapped to surface but then I couldn't extrude the sketch. Any help would be great
Why can't you get the 3d sketch to work? The "On Surface" relation can be a big help.
There are a few different ways to get what you want:
Create a plane or a surface and extrude that (up to surface of the cylinder) so that the intersection between the surface and the cylinder is the location of the sketch.
Then create a 3D sketch and use Convert Entities from the edges of the surface to get what you want.
See the attached video.
Thanks for the video. It was very helpful.
So I was able to get back to this problem and after all was said and done I got the 3d sketch on the surface of the cylinder but can't seem to extrude it...well I can but it extrudes sideways instead of up from the cylinder surface....again, any help is greatly appreciated
I tried Jason Martin's suggestion in his post but it will not recognize the 3d sketch
My sketch was actually not a 3D sketch at all. It was a basic normal sketch that was used by me. I'm sorry, I should have been a little more clear on that. Do the process as I stated in my last post below, and do not use 3D sketch. Let me know if that works. You may have to a bit of trial and error with the location of the sketch to get it to extrude the way you want it.
I'm sure you could find a way to combine the convert entities on the surface of the 3SD sketch with a regular sketch to convert entities from.
Damian Kilmartin wrote: So I was able to get back to this problem and after all was said and done I got the 3d sketch on the surface of the cylinder but can't seem to extrude it...well I can but it extrudes sideways instead of up from the cylinder surface....again, any help is greatly appreciated
Damian Kilmartin wrote:
With a 3D sketch you have to specify a direction.
Either create a plane for normal direction or select a premade one.
If you just need splines..
I remember doing something like this for my final 3D project in college. My project i picked involved modeling R2D2. It was a bit of work but it came out great. I made the sketch exactly as Dan Pihlaja in his video above. When finished with the sketch, select the wrap feature, using the sketch and use EMBOSS. The edges will come out at a perfect angle from the center.
Thanks for all the help. I did get the extrusion I wanted but now I have a different issue. I need to get a radius between the main body of the pin and the extruded feature. The challenge in there is different geometry so i thought a swept cut would work but not so much. Below is my pin and a 2d drawing of where I'm trying to get to. Any help is greatly appreciated.
As you can see, there is different radii. I've tried a couple things, swept cut, fillet (a couple different styles) and some other crazy stuff. I might have created the extrusion improperly to get the intended results, not sure.
This is what I thought would work but doesn't....
I don't think that would work since you have sharp edges at 2 points. It would work if it had a smooth transition all the way around it.
I think you could do it in 2 features. One on each side divided between the two sharp points. I'm not sure that would work but an idea to try.
I had tried that and still won't create the geometry...but thanks for the input
What if... The profile that you have to cut out shouldn't have a straight line connecting the two ends of the profile. it looks like you have 4 of those profiles(in the picture above, it is a light blue color). Why don't you try creating a full oval of the profile outside of the intended feature you are putting it around. Sometimes the loft can pull the profile in a weird twisting way that you do not expect.
I mirrored the geometry, removed the straight line, still no luck
I'm starting to think that my end geometry should be a 90 degrees from the angle of the straight section at each end of the extrusion....any thoughts
I do agree with that. just like it is in the middle sketch between the two sharp points.
You could try doing the middle sketch to the sharp point as a loft. then do it a second time the other way. Then mirror?
Hello Damian,..there are a few ways to go about this.. as is, or what I can see looking at your model..you could loft the half and mirror? (but you just said you had problems?.. it should work?).
So.. I took your ortho images and tried (using surfaces (half/mirror) and a solid loft (full surface faces and elip profiles)).. now, I do not know what the size is or required intent is.. but I'll assume the tear/foot/flare mounts inside a cylinder and the ortho section blends looks to be almost elliptical (that is what I used)? (see attached image and file)
so if I send you dimensions you can make my part? Just kidding.....looks like I need some advance modeling training. Most of the commands you use I have never used....I have to get up to speed on some of this stuff for sure. This is actually one solid piece of metal.
Variable size fillet might work for you. By the way, how do you intend to machine/make such a part?
This is a machined part...one piece of material
Retrieving data ...