Sheet thickness gradients
5.2.8
The greatest sheet thickness when deep-drawing rotationally symmetrical shaped sheet metal parts is on the outer edge of the deep-drawn part.9 It results from the product of the initial sheet thickness s0 and the square root of the drawing ratio β0. With complete flangeless draw, the sheet thickness sa reaches its maximum value smax.
Eqn. 1
| Max. sheet thickness | smax | = | mm |
| Sheet thickness | s0 | = | mm | |||
| Draw ratio | β0 | = |
Calc 1
Maximum sheet thickness9
Fig. 1
Wall thickness gradients of different part forms38
In the case of prismatic drawn parts, a maximum increase in sheet thickness in the drawn part flange of 22% was determined.35
9
Siegert, K. / Blechumformung / Springer Vieweg / Berlin / 2015 / …
38
Romanowski / Handbuch der Stanzereitechnik / Technik Verlag Berlin / Berlin / 1968 / 4. Auflage
35
Strackerjahn, W. / Die Voraussage des Versagensfalls beim Tiefziehen rechteckiger Teile / Dissertation / Hannover / 1982 / …