Incremental Sheet Forming (ISF)

Process Definition & Working Principle

Incremental Sheet Forming (ISF) is an advanced sheet metal forming technology characterized by progressive, localized plastic deformation of a clamped blank. The deformation is induced by the continuous movement of a hemispherical-ended tool (also referred to as a stylus or forming tool) along a pre-programmed 3D path generated by a CAD/CAM system. Unlike conventional forming techniques such as deep drawing or stamping, ISF is a "dieless" or "semi-dieless" process, meaning it eliminates the need for dedicated, shape-specific punch and die sets. This feature drastically reduces lead times and tooling costs, making ISF highly economical for rapid prototyping, customized production, and low-volume manufacturing.