3 Fundamentals of press design

Shearing lines
The stripper plate is raised during the feed movement sufficiently to
ensure that even corrugated coil stock can be transported through the
open die. After perforation, the corrugated sheet metal can be straightened
by the stripper plate.
Before an electrohydraulically powered shear, mounted at the outfeed
roller upright, separates the coil into plates, it can be cut using a supplementary
slitting or notching device into various widths. The slitting or
notching device is mounted either at the main slide – the more economical
solution – or fastened at a slide driven separately by the eccentric
shaft. In this case, it must be possible to move the separating shear
out of the way. If the device is mounted at the main slide, it must also be
possible to remove the outfeed system to ensure improved accessibility.
When changing dies, the resetting time required can be reduced by
exchanging the slitting or notching device from the press outfeed side.
The perforating dies can be released by means of hydraulic quick-action
clamping devices and removed complete at the side of the press.
Individual or multiple rows of perforating punches in the die can be
moved into place, depending on the specifications of the program,
using a electrohydraulically actuated sliding beam. Even at maximum
slidestroke[mm]
stripper stroke [mm]
6
°
start feed phase
Fig. 4.6.31 Stroking curves of the slide and stripper plate with a sheet metal thickness of 2 mm
Metal Forming Handbook / Schuler (c) Springer-Verlag Berlin Heidelberg 1998
slide
stripper
317