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3 Fundamentals of press design

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Bending<br />

Fig. 4.8.7 Roll forming: roll bending in several stages<br />

– Folding:step-by-step bending <strong>of</strong> straight legs around a common point<br />

(Fig. 4.8.9).<br />

– Beading: recesses in the pr<strong>of</strong>ile, e.g. for reinforcement (Fig. 4.8.10).<br />

– Doubling: The material is doubled back on itself, for example at the<br />

edges (Fig. 4.8.11).<br />

a b c<br />

Fig. 4.8.8 Rolling: aeye: circular shape with only one radius; boval: circular shape, made<br />

up <strong>of</strong> several radii; cloop: material not entirely bent over<br />

Metal Forming Handbook / Schuler (c) Springer-Verlag Berlin Heidelberg 1998<br />

Fig. 4.8.9 Folding<br />

375

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