This metal fabrication process progressively bends a continuous strip of metal (typically steel, stainless steel, aluminum, or other ductile materials) at room temperature into a desired cross-sectional profile. The strip is fed through a series of rollers, each performing an incremental bend until the final shape is achieved. This process can create complex shapes with high precision and repeatability, such as structural framing members, roofing panels, automotive components, and custom profiles.
Compared to hot rolling, this room-temperature fabrication method offers several advantages, including improved surface finish, enhanced material strength due to work hardening, tight tolerances, and high production rates. Historically, simpler versions of this technology existed for centuries, but significant advancements in the 20th century, including the development of sophisticated tooling and automation, transformed it into a highly efficient and versatile manufacturing process crucial for various industries.