| 摘要 |
<p>Method and apparatus for forming sheet metal to a desired profile in draw forming rolls in which in a first roll stand an easily drawn curved initial rib is produced and in a second roll stand the rib is reshaped, for example into a pair of ribs. The method is repeated to one or both sides of the initial deformation to make further profiles, at least one further initial rib being formed in the second roll stand to one side of the first initial rib.</p> |
