Sheet metal & drawn parts penetration

Penetrate — Fig. 1
Stages in penetration deep drawing
D Deformation R Reformation s 0Initial sheet thickness
s n base plate thickness after penetration h p frame height created

Penetration offers the possibility of adjusting solidifications in the drawn part base according to the specific functional requirements of the drawn part. Through repeated deformation and re-shaping of the floor area, material is redistributed from the bottom into the wall of the drawn part. This method increases material efficiency and thus increases the sustainability of the entire manufacturing process.*****

During the deformation phases, the surface area of the floor area is increased, which leads to a reduction in the sheet thickness in this area. In the subsequent reformation phases, material flows from the ground into the wall of the drawn part. This redistribution of material means that a smaller starting board can be used while maintaining the same height of the drawn part.

Penetrate Tub I — Fig. 2
Drawing simulation of a rectangle → phase of the deformation

Penetrate Hull II — Fig. 3
Drawing simulation rectangular part → elongation between 12% - 18%

After several penetrations, the soil is thinned out by between 12 and 18%. The insert board can be reduced in size accordingly.

The benefits of this procedure include:

Solidification of the drawn part base up to the maximum possible expansion of the sheet metal
Achieving a higher degree of forming
Adjustable properties through variable parameters
Significant material savings*
Possibility of process control
Improvement in shape retention
Increasing process stability
Reduction in reject rates

Converting an existing process to this procedure can be done in four steps:

The potential of the process can be estimated through an initial feasibility and economic efficiency analysis.
Determination of material savings and shape accuracy through comparative
Making a test board on a test press. This test board is run through the existing process and the resulting properties can be evaluated.
In the last step, the conversion of the process is planned and implemented.

Science Prize 2008 — Fig. 4
Award of the Science Food of the IFU 2008

This technology was presented as part of the international conference "Recent developments in sheet metal forming 2008", organized by the IFU Stuttgart under the direction of Prof. Dr.-Ing. Liewald MBA, honored with the Science Prize.

Reitter, G. / Wirtschaftlicher Tiefziehen / Bänder, Bleche, Rohre / … / 2008 / …

Reitter, G. / Verfahren zum gezielten Beeinflussen des Blechdickenverlaufs und der Verfestigung einer Blechplatine / Patent Nr. DE102007050580A1 / … / … / …

Reitter, G. / Verfahren zum gezielten Beeinflussen des Blechdickenverlaufs und der Verfestigung von Bereichen eines Tiefzieh- oder Streckziehteiles / Patent Nr. DE102008047848A1 / … / … / …

Reitter, G. / Werkzeug und Verfahren zum gezielten Beeinflussen der Zipfelbildung bei Rundteilen beim Tiefziehen von Hohlkörpern / Patent Nr. DE102007052584A1 / … / … / …

Kriechenbauer, S. / EFB-Forschungsbericht Nr. 492: Lokale Verfestigung von Tiefziehteilen auf mehrachsigen Servopressen durch angepasste Bewegungsprofile / Europäische Forschungsgesellschaft für Blechverarbeitung e. V. / … / 2018 / …