3 Fundamentals of press design

296 Sheet metal forming and blanking
Fig. 4.6.10 Effect of penetration depth control on the increase in penetration depth
rollers, while the horizontal press rigidity is appreciably increased
through special configuration of the press body.
The slide is guided without play by means of rollers at four columns
(cf. Fig. 3.1.6). The optimum arrangement of gibs above and on the
blanking plane, in particular, serves to reduce slide vibrations compared
to previous slide gib systems so that a substantial increase in die life is
achieved.
In contrast to conventional presses, the configuration of the press
body is now so compact that upright deflection under load is negligible,
and horizontal forces generated during blanking can be absorbed
evenly over the entire gib area.
4.6.4 Lines for the production of electric motor laminations
Rotors and stators in electric motors and iron cores in transformers are
made from individual layered pieces of sheet metal ranging from 0.5 to
1mm in thickness, in order to reduce eddy current loss (Fig. 4.6.11).
The starting material used for this type of application is siliconalloyed
iron sheet or semi-finish sheet, which is available in coil form
Metal Forming Handbook / Schuler (c) Springer-Verlag Berlin Heidelberg 1998