Mirror-add not working-sheet metal

Carson_Leh

Thanks in advance to the Onshape community for helping here.

I'm modeling a chair and I'm designing the backrest to be made from sheet metal. I've figured out the workflow to create this backrest fairly well on my own. I'm copying a sketch line from a separate part then extruding it as a surface then sketching and extruding shapes to cut away at the surface to create my final part. This part is then being converted into sheet metal. Problem is the part always stays split into two rather than combining into one part as it should.

Unfortunately I've tried a number of approaches and none seem to be giving me the results I need.

The sketch line is mirrored from the right plane. When I convert my surface to sheet metal it splits it into two parts rather than add/merge There's a physical gap between the two parts I can't seem to figure out why.

My model is here: https://cad.onshape.com/documents/1c33273dfe508cda08bc461d/w/3cae70e98bb5b88e863c66e5/e/03ef4fc3eaaafddbe9a0b52e

EvanReese

In this case you're in luck because there's a really easy approach. Just extrude your sketch curves straight from the sketch instead of extruding a surface to convert to sheet metal.

EvanReese

In this case you're in luck because there's a really easy approach. Just extrude your sketch curves straight from the sketch instead of extruding a surface to convert to sheet metal.

Carson_Leh

Thank you so much! It looks like that method keeps the part combined!