FIBRO Flex Cam Manual page 10

Flex Cam
Possible combinations
Power Unit with Cam Unit
Cam Unit leading
If a stroke of the Cam Unit is required before the tool
actually reaches its working position, this can be
achieved by incorporating a gas spring. The press stro-
ke actuates a gas spring which, in turn, actuates the
Power Unit, since its prestressing force is higher than
the nominal force of the Power Unit.
When the Cam Unit reaches its end position, the drive
(press) overtravel is compensated by the retracting
piston rod of the gas spring. A spring contact washer
transmits the pressure of the gas spring to the suppor-
ting tube when the Power Unit reaches its end position.
Gas spring
Spring contact washer
Supporting
Power
tube
Cylinder
„leading"
Several Cam Units driven asynchronously
Several Cam Units can be driven by a common Power
Unit. The individual Cam Units should not, however, be
mechanically connected to one another since the
feedrates cannot be totally synchronised due to the
different connection lengths (system losses) and
restoring forces.
Power
Unit
10
Press
Cam Unit
°
Press
Cam Unit
°
Several Cam Units driven synchronously
Synchronous operation can be achieved by using two
systems of the same dimensions, although this appli-
cation requires the restoring force of the individual
Cam Units to be equal, as well.
Power
Unit
One or more Cam Units driven with delay
A time delay, and thus a variable working sequence for
the Cam Units, can be achieved by combining two
different strokes. The first Power Unit to be actuated
executes the first step. As the Cam Unit moves beyond
its end position, the excess oil is displaced into the
Accumulator (not shown in the diagram). The second
Power Unit can then enter the working sequence as
required.
Power
Unit
Variable speed / force drive
The forces or travel speeds can be combined as
required by varying the ratio between Power Unit sizes
and Cam Unit sizes. The maximum travelling speed
should not exceed 0.8 m/s, however.
Power
Unit
Power
Unit
2018.
Press
Slide
°
Cam Unit
Press
Cam Unit
°
Press
Cam Unit
°
Press
Cam Unit
°
subject to alterations