Drawing gap

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As a drawing gap , the distance between the drawing ring (will die ) and draw punch during the deep-drawing of sheet metal understood. In general, the drawing gap is larger than the sheet metal thickness, otherwise the sheet metal will also be ironed. A drawing gap that is too narrow can lead to cracks in the bottom. If the drawing gap is chosen too wide, this can result in wrinkles. A simplified design succeeds if the drawing gap is dimensioned with 1.4 times the corresponding sheet thickness.

Usually different drawing gaps are also used for different sheet metal materials.

In summary, the size of the drawing gap has an impact on:

  • the quality of the material to be formed
  • the tolerance of the drawn part
  • the strain hardening of the sheet in narrow drawing gaps
  • the achievable draw ratio
  • the surface (with narrow drawing gaps)

Individual evidence

  1. ^ Gerhard Oehler, Fritz Kaiser: Cutting, punching and drawing tools 7th edition, Springer, Berlin 1993, ISBN 3-540-56700-3 , p. 329 f.

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