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3 Fundamentals of press design

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18 Basic principles <strong>of</strong> metal forming<br />

Twisting is a method <strong>of</strong> forming under shearing conditions in which<br />

adjacent cross-sectional surfaces <strong>of</strong> the workpieces are displaced relative<br />

to each other by a rotary movement (Fig. 2.1.27).<br />

clamping jaws<br />

workpiece<br />

cheek<br />

workpiece support<br />

workpiece<br />

bending mandrel<br />

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

Fig. 2.1.23 Roll forming<br />

Fig. 2.1.24 Swivel bending<br />

clamping fixture Fig. 2.1.25 Circular bending

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