I often work with cylindrical sheet metal parts. These parts are usually laser cut in the flat, then rolled into a cylinder and seam-welded. In Solidworks 2010 SP 4.0, when I model a cylinder I'm having a problem with temporary axes disappearing after I convert my cylinder to sheet metal. These temporary axes are (or rather should be) through holes in the cylinder, and I need these axes to later mate parts (usually bolts) to the holes. Without them, it is not possible to make the bolts concentric with the holes.
1. I start the part as a basic extrusion.
2. Then, I put the holes into it.
3. Then, I convert to sheet metal.
Just to be clear, the temporary axes disappear between steps 2 and 3.
I would really like to solve this problem as it has been driving me nuts for ears now! Thanks for any help as always.
note: I have attached a file showing the "problem".
If there is no way to display these temporary axes, is there a way for me to somehow add an axis to these holes so that I can easily mate other parts to them?