How do I retro-mitre a box?

bart

If I draw a four sided box, how can I split it into four parts?

https://cad.onshape.com/documents/519a41adbb034d51bae1ef5f/w/5cdc28e704584357975c1ef2/e/80c892160dd749da88240570

I know I could just draw a sketch with mitres then extrude each side as a new part. But say for some reason I decided to make life difficult for myself.

I tried extruding mitre sketches through the four corners then using the "split" tool, but that didn't work.

Any ideas, please? I don't know how to make this drawing editable unfortunately.

mahir

To split a part, you have to split it into multiple bodies. Your surfaces cut through the box, but none of them split it into separate bodies. If you create a surface that includes at least two of the miter joints, you should be able to split the part with it. Here's one way to do it.

https://cad.onshape.com/documents/57b2a18ee4b0a399ffae400b/w/b8016136c2c4773cede2fe6d/e/ae7d3cb33aff10510ec47afd

mahir

To split a part, you have to split it into multiple bodies. Your surfaces cut through the box, but none of them split it into separate bodies. If you create a surface that includes at least two of the miter joints, you should be able to split the part with it. Here's one way to do it.

https://cad.onshape.com/documents/57b2a18ee4b0a399ffae400b/w/b8016136c2c4773cede2fe6d/e/ae7d3cb33aff10510ec47afd

bart

Mahir,

This is amazing! You're a genius. Thank you so much

Bart

mahir

No problem