I don't know Inventor, but it looks like you are just missing draft or taper. Can you search the help file for "Draft"?
I've attached two sample images of draft and no draft from a similar tool in SolidWorks
Can you show me how you creat the sketch?
I creat sketch inventor but inventor cant creat rib ;/
I've never used Inventor, but that is exactly how I'd draw the sketch in SolidWorks.I assume the green line is what you sketched, and the yellow lines just show where the model intersects with your sketch plane.
Check out this video: https://www.youtube.com/watch?v=P5pojOs9aKk
I think the only thing that could go wrong is the option that makes the sketch normal to, or parallel to the sketch plane. They show it at about 1:20 in the video.
I still can't creat rib with wings on round surfaces ; /
Nobody uses Inventor? ; [
OK issuee solved ;]