The process of changing a geometric form characterized by a uniform, outwardly extending shape into one where the material has been removed, creating an inward, recessed form, is a significant technique in various manufacturing and design fields. This transformation involves altering the surface profile from projecting outwards to receding inwards. A practical illustration might be taking a solid, cylindrical piece and machining it to create an internal cavity or a negative impression of the original cylinder.
This reshaping method offers numerous advantages, including weight reduction in components, the creation of internal features for mechanical interlocking or fluid passage, and the ability to produce molds and dies for subsequent manufacturing processes. Historically, such transformations were achieved through manual carving or casting methods. However, advancements in machining technology, such as CNC milling and electrical discharge machining (EDM), have enabled greater precision and complexity in creating these inverted forms.
