Welcome in the forum!
I just do this for you, check my attachment.
Long dimmension of spline i change because it's must be : 2*3,14*r.
Also this sketch must be closed.
Sleeve1.zip 22 bytes
A different approach.
Using Spline on Curve. Construction Sketches to correctly position the spline (sine wave)
Split Line (Curves Toolbar) Select inner and outer faces
Surface Fill - Merge - Try to Form Solid
Spline on Curve - Split Line.zip 269.4 KB
Michael, thanks for the response but I couldn't open the file. I have SW 2013 Premium and it said "cannot open file, future version"
Are you using '14? Thanks!
Sorry, backwards compatibility!
Attached are a series of images which may help!
Create sketches on planes
Then 3DSketch>RMB Graphic area>Spline on Surface
SplitLine >Select 3D sketch> Inner & Outer Faces
Delete Faces> Inner , Outer , Top
Surface Fill> Select both edges> Merge Results, Try to Form Solid