3 Fundamentals of press design

88 Fundamentals of press design
cart
new die
double
chain speed
press body
cart coupling
bracket
catch pin
centering prism die stop
producing die
Fig. 3.4.2 Double motorized die charge cart with overrun drive
energy supply
electric dri e
In cases where dies are positioned on roller conveyors, the force
needed to displace the dies is minimized by using profile rails with
roller elements in the T-slots of the clamping plate. Equipped with
spring-mounted ball roller elements, these profile-rails offer a freedom
of movement in all directions when handling lightweight dies. Heavier
dies, in contrast, should be transported on hydraulically raisable rollers,
as linear contact leads to a higher surface pressure. The surface of the
die body coming into contact with the rollers must be hardened.
Die centering on the press bed plays a determining roll when changing
dies. Manually displaceable dies can be aligned with sufficient accuracy
using a central groove in the clamping plate or by means of centering aids
in the T-slots or clamping plates. Dies or presses with automatic transfer
Metal Forming Handbook / Schuler (c) Springer-Verlag Berlin Heidelberg 1998
cart