The W Corrugation Forming Machine represents a critical piece of equipment in the industrial metal packaging sector, specifically engineered for the production of steel drums and barrels.This machine is designed to form the distinctive "W" style bead—a corrugation consisting of a central outwardly projecting section flanked by two inwardly projecting sections—into the cylindrical body of steel drums, most commonly the 55-gallon (210-liter) capacity. The W bead serves both structural and functional purposes: it reinforces the drum body against deformation during transport and storage, and provides a rolling surface that facilitates manual handling of filled drums. Modern W Corrugation Forming Machines are built with heavy-duty, stress-relieved steel weldments to withstand the high forces involved in cold-forming steel, ensuring long-term operational durability.The machine typically operates through a synchronized mechanical system featuring two forming heads that move into the drum body from each end. Each head is equipped with inside forming rolls, driven by gear motors, and outside forming rolls mounted on bearings, allowing them to follow the speed of the driven rolls for smooth and precise bead formation.A notable feature of advanced machines is the cam system located under each forming head, which raises the inside forming rolls to lift the drum shell out of the index conveyor during the forming cycle, eliminating the need for a separate cradle mechanism.