How to extract or make pressing die from sheet metal part drawing?

penny_lee

We have completed a sheet metal part, let's say an aircraft wing rib. Now that there is a 3D model of the part. How can we extract a pressing die with measurements so we can produce a forming die? Or do we have to make a solid model to fit inside our rib 3D model?

Just learning Onshape and its capabilities.

john_mcclary

What I would do is make another part studio.
Then derive your formed part into the new part studio.

Draw a 3D box around the part.
Boolean subtract the part from the 3D box (With offset) 
Split the 3D box in where you're parting them.

What you should be left with is a stamping tool and die that forms your part.

From here you need to add drafts and relief as needed of course.

But that is generally a good place to start.
Tool & Die | Assembly 1 (onshape.com)

matthew_stacy

Forming die geometry may need to be further modified to account for spring-back, depending on geometry and tolerance requirements.

john_mcclary

Right, I just show how to get the negative of the shape. After that it's up to a die designer to do the typical modifications to make it a die.