3 Fundamentals of press design

Mechanical presses
with a long service life and low maintenance costs (Fig. 3.2.8). The electric
motor drives the eccentric shaft by means of a flywheel, a clutchbrake
combination that can be either hydraulically or pneumatically
actuated and a high-performance planetary gear (cf. Fig. 4.4.4). This
eliminates the need for the reducing gear generally required for universal
presses. Compact drive systems using a hydraulic clutch-brake combination
are particularly environmentally friendly, as they produce no
abraded particles and run at an extremely low noise level.
3.2.5 Longitudinal and transverse shaft drive
The design of a mechanical press is determined mainly by the arrangement
of the drive shafts and axles, and by the number of pressure points
of the connecting rod on the slide (cf. Fig. 3.1.3). The term longitudinal
or transverse shaft drive is defined by the arrangement of the drive
shafts relative to the front of the press, where the press operator stands.
eccentric shaft
planetary gears
clutch-brake disks
flywheel
Metal Forming Handbook / Schuler (c) Springer-Verlag Berlin Heidelberg 1998
Fig. 3.2.8
Compact drive
system used in a
universal press
63