Short stroke penetration

The production of the drawn part takes place in two consecutive work steps. In the first step, the sheet metal is thinned out by multiple penetrations, creating a frame. In the second step, the preformed circuit board is then formed into a pot.49

Vid. 1

Short stroke penetration of a board

In the first step, the board is stretched through several penetrations in the floor area. The initial sheet thickness is reduced and the affected sheet metal zone is hardened to the desired value.

Vid. 2

Deep drawing of the penetrated board

The pre-formed board is forwarded to the deep-drawing station, where it is formed into a deep-drawn part.

Short stroke penetration — Fig. 2
Short-stroke penetrating beer keg
1) Penetrated circuit board 2) Subsequent deep drawing

The targeted strain hardening in the base area is particularly advantageous for the valve sleeve welded there. The static and dynamic strength characteristics experience a significant increase as a result.

Material efficiency penetration — Fig. 3
Short-stroke penetration beer barrel
1) Beer keg with penetrated circuit board 2) Conventional beer keg

A direct comparison of a penetrated beer barrel with a traditionally manufactured one shows clear differences. Particularly noteworthy is the larger flange created by the redistribution of the sheet volume from the floor. In this case, the weight of the insert board can be reduced by 370 grams. At a current daily price of €2.5 per kilogram, this results in a cost saving of €0.925 per component.

Reitter, G. / Vorrichtung und Verfahren zum gezielten Beeinflussen des lokalen Blechdickenverlaufs und der lokalen Verfestigung einer Blechplatine / Patent Nr. DE102019005063A1 / … / 2019 / …