3 Fundamentals of press design

Shearing lines
Fig. 4.6.13 Complete blanking die set
to generate contours, several rows of notches in a single clamping operation,
uncommon notching pitches (relative to 360°) and particularly
wide notches using double punches.
In automatic notching machines and flexible notching systems, the
unnotched blanks are removed fully automatically from a stack of
blanks and fed into the notching machine. Following the notching
operation, the blanks are removed, also fully automatically, and
deposited on a stack. The loading and discharge operations are performed
either by a slewing ring, a linear transfer system or a robot. The
six arms of the slewing ring of an automatic notching machine, which
operate using a circular indexing technique, are equipped with centrally
adjustable transport magnets. Although this process permits the
shortest possible indexing times, it only allows the processing of round
or polygonal blanks. In the standard version, the blanks are transported
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