3 Fundamentals of press design

300 Sheet metal forming and blanking
Fig. 4.6.14
Notching machine for circular
blanks with numerical indexing
drive system (nominal press
force 250 kN)
from one stacking mandrel to the next. With special attachments, pallets
can also be used.
On automatic notching systems with one notching machine, it is
possible to carry out either
– simultaneous notching and parting operations or
– only notching operations or
– first stator notching and parting and then rotor notching in two
passes.
However, rotor and stator laminations can be produced in a single pass
on a line with two notching machines (Fig. 4.6.16). In the first case,
additional shaft hole punches are inserted in an empty station, in the
second case, the blanks are positioned in the sixth station and passed
outwards to the shaft hole notching device. Slewing arms are the most
economical and most efficient way of automating notching machines
for the production of standard laminations.
Metal Forming Handbook / Schuler (c) Springer-Verlag Berlin Heidelberg 1998