3 Fundamentals of press design

Die design
wedge
adjustment
auxiliary
column
clamping
ring
punch
pneumatic pad
transport strap
die holder
die holding sleeves
pressed part
active components
exchange components
part-dependent
exchange components
acitve component clamping
wedge adjustment
Fig. 6.7.2 Section through a die holder with wedge adjustment
(auxiliary columns and transport straps are built in for die holder change)
dies
counterpunch
If no slide height adjustment is available in the press, the wedges must
then have a longer adjustment height of approx. 8 to 12 mm in the individual
stations. Before actuating a wedge adjustment device, the clamping
ring is released, thus allowing the downward motion of the dies. The
upper dies are relatively high, as they are designed to accommodate
pneumatically supported pads for workpiece transfer (Fig. 6.7.3). As a
result, reliable part transfer is ensured. Thus, higher effective stroking
rates and increased output can be obtained. The stroke of the pneumatic
ejectors is determined by means of a transfer study (cf. Sect. 6.6.2).
Active and exchange die components are located in the die holders.
The active die components contact the workpiece contour and are subject
to wear. These must be reworked or replaced periodically. The
active die components include the containers, the die inserts, punches
and counterpunches, as well as for example stripper sleeves. The partdependent
tooling must be exchanged together with the active die
Metal Forming Handbook / Schuler (c) Springer-Verlag Berlin Heidelberg 1998
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