Stretch-bend-leveling lines for thin and foil metal strips

b+s stretch-bend leveling lines are designed to improve the flatness of thin and ultra-thin metal strips through the combined action of controlled tension and bending. The process minimizes typical shape defects, including wavy edges, center buckles, crossbow, camber and coil set, while reducing internal stresses within the material.

The technology can also influence key material parameters such as yield strength, elongation and spring bending limit. The resulting strip quality supports downstream forming operations, improves the dimensional accuracy of finished parts and can enable thinner coatings in surface-finishing processes.

The lines offer a high degree of automation and can integrate flatness measurement with coordinated leveling technology. b+s also provides solutions for processing ultra-high-strength materials with tensile strength above 1,500 N/mm² and yield strength above 1,100 N/mm².

Line specifications

• Coil weight: up to 30,000 kg / 66,139 lbs
• Strip width: up to 1,650 mm / 65 in
• Material thickness: 0.01–2.0 mm / 0.0004–0.08 in
• Processing speed: over 400 m/min / 1,312 fpm