Cut extrude the flat back of a part to match the curved front...

rashuge

I have a part I have been working on for a while now trying different things.  The original is done in fiberglass and was very curvy.  I need to try and do two different things.  One, I need to curve in the middle of the front so it is more flat but the edges still have their curves.  Second, I need to take the back from flat to match the curve of the front and let me thicken it.  Not sure where to go from here.  The solid main body edges on the front patch the handmade fiberglass mating surface exactly.  It is getting it to a more finished product that I can then put mounting holes and brackets and such on the back.

https://cad.onshape.com/documents/2a9713f094eb2063352fd4dd/w/bd717148e7ea1cdde6be431c/e/7eb0bacf78bd7bef95e4794f?renderMode=0&uiState=64fb8ae7503b2e3c39c91deb

lucas_johnson223

I'm having a bit of a hard time picturing exactly what you're looking for, but have you tried playing with the Loft feature?
Loft (onshape.com)
Instead of just extruding a surface, you can loft a surface from multiple sketch curves. Made on planes offset from your top plane.
You'd probably have Horz Curve 1, Horz Curv 2, etc. all controlling your Horz surface loft.

rashuge

I ended up being able to extrude to face and getting it to do what I wanted it to.  Just have a hard time with curved surfaces and then trying to work with those.  Still pretty green to the whole thing.