3 Fundamentals of press design

222 Sheet metal forming and blanking
Fig. 4.4.18 Blank turning device for multiple stacks
engage between the pallet and the stack. The forks close and the stops
automatically come to rest against the stack. A rotation around the horizontal
axis of the turning device moves the stack of blanks to the
desired position for uplifting. After the forks are opened, a second carriage
with the pallet takes over the stack. Fully automatic changeover of
the pallet surface and the transport directions ensures fast set-up and
also allows to position several stacks of blanks on one pallet. Here, the
stacks are turned over in sequence and deposited back onto the pallet in
a defined position.
4.4.5 Press lines
As a rule, series production of medium-sized and large sheet metal parts
is performed on press lines or large-panel transfer presses. The former
consist of a series of mechanical (Fig. 4.4.19) or hydraulic (Fig. 4.4.20)
Metal Forming Handbook / Schuler (c) Springer-Verlag Berlin Heidelberg 1998