3 Fundamentals of press design

Shearing lines
mass counterbalance
roller bearing
eccentric shaft
hydraulic brake
feed drive
feed
press body
spring body
Fig. 4.6.8 Construction of a high-speed press (short version)
Another important aspect determining the output of a high-speed
blanking line is its stroking rate. High stroking rates can only be
achieved where there is a counterbalance of masses created by the horizontal
and vertical forces (Fig. 4.6.8). Counterbalance systems in which
the forces of the slide and upper die are completely eliminated by
directly opposing masses have proved particularly beneficial. The mass
compensation of presses with stroke adjustment, which are also suitable
for smaller forming operations, is automatically adjusted together
with the stroke. Mass counterbalance is an essential prerequisite for
subcritical arrangement of the press on rocker elements, which ensures
that the vibrations initiated by the stamping process are transmitted
only minimally to the foundation.
The systems of part removal, transport and interlinking with the
downstream production process increase in significance as the press
Metal Forming Handbook / Schuler (c) Springer-Verlag Berlin Heidelberg 1998
variable DC drive
flywheel
hydraulic coupling
double fork
connecting rod
penetration depth
control device
pressure point
slide gib
slide
bed plate
293