What if you receive an imported sheet metal model with weird abnormalities, like jagged edges or crazy surface shapes?
Maybe it’s not even a solid, due to these issues. I’ve seen a few such models while working in the sheet metal industry, where it was so “not right” that it defies trying to put into pictures, as I’m not even sure how to model such stuff. Flattening such a model might be impossible unless/until you manage to capture just the intended design while eliminating the weird stuff. So here is a very efficient way:
- Decide which side is closer to the intended design: the inside or the outside.
- Right-click that side and choose Select Tangency, assuming that the model has round bends. The entire model should now be selected, on just the one side. If the model has sharp bends, then you will need to Ctrl-select all the faces on the chosen side.
- Do an Offset Surface of zero distance. This will copy the entire side of the model as a surface body. You can find Offset Surface on the Surfaces tab of the Command Manager or by doing a Command Search.
- Thicken the new surface body to the correct sheet metal thickness and to the correct direction. You should now have an exact or almost exact replica of the original design, without the geometric oddities. I said “almost exact” because before you delete the original solid body, you will want to take note of any geometry that is different between the inside and outside faces, such as countersinks. You will want to ensure that those get carried across to the new solid body.
- Insert Bends to apply sheet metal properties and the flat pattern.
How cool is that? 😀