Rolled sheet metal

brian_pinder662

Hello there, new project. Could anyone help. I would like to add some holes to a rolled sheet metal part but can't see how this can be done. Can anyone say if this is possible, if so a little advice would be appreciated.
Brian

bradley_sauln

Hey @brian_pinder662

You can add holes to a rolled piece of sheet metal but we'd like to clarify a few things first. Do you want the hole to be circular before or after it is rolled? Right now we can only help with creating holes that you want to be circular after the part is rolled resulting in a potential ovular shape in the flat pattern (we can't design in the flat pattern right now).

You can either sketch out your hole features as seen here:


Or use the hole feature as seen here:


You can find more general info around our sheet metal but looking at this section of our help documentation.

brian_pinder662

Many thanks for your reply, but how would you apply a workplane to the rolled surface in order to create the sketch. Sorry if this seams obvious to you but I have still a lot to learn 
Brian

Jake_Rosenfeld

Hi @brian_pinder662

I may be misunderstanding your question, but arbitrary planes can be defined using the "Plane" feature:
https://cad.onshape.com/help/Content/cplane.htm

You cannot sketch directly on a rolled surface, currently sketching can only be accomplished on construction planes (created by the "Plane" feature) or planar faces.  You can either sketch a circle and then "Extrude" with "remove" option to cut the circle, or you can sketch a point and use the "Hole" feature.
https://cad.onshape.com/help/Content/extrude.htm
https://cad.onshape.com/help/Content/hole.htm

owen_sparks

Also a common misconception, if you're say extruding a circle to make a hole, then that plane / sketch does not have to touch the surface you wish to cut.  It can be away from the part.  The extrude can then project towards the part as far as needed.

There is also a nice featurescript that will make you a plane tangent to a surface should you need one.

Cheers,

Owen S.

brian_pinder662

Thanks again for your replies, I am sure I will get there now.
Best regards tro all, Brian.