3 Fundamentals of press design

Shearing lines
Fig. 4.6.15 Complete blanking die for the production of segment blanks
Depending on the blank geometry, flexible notching systems work
with transfers or robots. In this case, transport always takes place from
one pallet to the next (Fig. 4.6.17). The standard number of five stations
can be extended at will. As for semi-automatic notching machines
with numerical control, flexible automatic notching lines are
particularly suited for the manufacture of complex blanks: The same
selection criteria apply concerning controllable dies. At a higher level
of automation, automatic notching machines can be individually
adjusted to specific production processes. One such device joins baked
enamel-coated laminations to create a complete lamination stack of the
type used in electric motors. The stator blanks are individually heated,
inserted in a basket-like device. Pressure is applied onto the complete
stack with each inserted lamination. A measurement device guarantees
a consistent stack height. Once the required stack height has been
reached, the basket-like device containing the laminated stack is swivelled
out. The pressing process is carried out while the next stack is
being formed. This curing period allows the coating on the lamina-
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