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techniques where the workpiece is passed through a series of flatteners (of larger magnitude than most common rolling devices) that match the workpieces' cross-section. The most common method uses 3 rollers; the bending is controlled by varying the distance between the rollers.
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It is a cost-effective way of bending these materials because the process requires less set-up time and uses pre-made dies that are changed according to the shape and dimension of the workpiece. This process can roll workpieces into full circles.
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Structural shapes can be rolled in different ways such as the “easy-way”, the “hard-way”, heel in/out, ball in/out, leg in/out, stem in/out, and off axis. The hard-way would be bending the workpiece in the orientation where its
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is the greatest. The easy-way is bending the workpiece along the axis with the smallest moment of inertia. For example, a piece of
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the workpiece to a desired shape while maintaining a constant cross-section. Structural shapes that can be made with this
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rolled the easy-way would be rolled along one of its flanges, while the hard-way would be along the angle itself.
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Cross-sections of continuously rolled structural shapes, showing the change induced by each rolling mill.
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How We Form Steel to Bend Metal Pipes and Tubing (roll forming)
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can also be rolled. Common applications include railroads,
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process include I-beams, H-beams, T-beams, U-beams,
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