When asked to identify the three most common forming modes, metalformers usually will respond with "stretch, bend and draw." However, careful study of these forming modes reveals much similarity among them. Most stretch stampings form internal configurations where the blank may undergo elongation over a flat die region; stretching over a dome; bending around a corner; compression of the workpiece into a cavity; or creating a complex contortion of intertwining shapes. Often, stretching is the minor forming mode of a stretch-form stamping.
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