A double bend is a bend between two parallel faces that are coplanar. The term coplanar means flat surfaces lying on the same plane.

Question

Quizplus · Accepted Answer

A double bend refers to a feature in sheet metal where two bends are made close to each other, but it does not specifically imply that the bends are between two parallel, coplanar faces. Coplanar indeed means that surfaces lie in the same plane, but a double bend's definition is not about the coplanarity of external faces.

A Double Bend Is a Bend Between Two Parallel Faces