Creating a U-Shaped Cavity with Rounded Base in Onshape

fernando_davila

Hello Onshape Community,

I'm working on designing a rectangular solid with dimensions 10 inches (length) x 5 inches (width) x 5 inches (height). My goal is to create a U-shaped cavity within this solid, ensuring a uniform wall thickness of 0.5 inches. Specifically, I want the bottom of this cavity to have a smooth, rounded transition between the vertical walls and the base.

I've explored various approaches in Onshape but haven't been able to achieve the desired result. Could anyone provide guidance or recommend specific tools or features within Onshape that would allow me to model this U-shaped cavity with a rounded bottom effectively?

Thank you in advance for your assistance!

jelte_steur814

sketch the rectangle, extrude

sketch the desired u shape, extrude (remove) with a start offset and an up to face with a certain offset.

to make the uniform wall thickness parametric and easy to adapt, make a variable (#T = 0.5") before the U shape sketch and refer to that in your dimensions and offsets.

another approach would be to create the rectangle, shell it, and add the center solid part of the u back. then add some fillets

glen_dewsbury

This can be done wit a sweep as another option.

https://cad.onshape.com/documents/2e9ab31421e4cce8455c3c86/w/65e81d8a9a40060d6f87efb7/e/aaac91f93479ba49d95e10ac

eldon_brown

My Try, with Shell and Fillets:

https://cad.onshape.com/documents/78d5f27b8957a7986efd4427/w/39b0b6c49783d17f65745318/e/0b6f0b607ae111a4e25749d8?renderMode=0&uiState=67ec161b0261ca7363110645

—Eldonb