of the slide and cushions
to set pre-acceleration to prevent severe press damage?
Using the Signature
Statistical Process Controller® and SAMview™
software one is able to get detailed real-time images of press force
interactions between components such as accelerating cushions and slide
motion. Using these capabilities the operator is able to see the process and properly make adjustments for correct interaction thereby
eliminating expensive press damage and lost production.
has developed a variation of their standard "signatureACE™"
system configured to provide analysis of the hydraulic draw cushion installation
on the Schuler™ Crossbar machines (or other presses so equipped).
The user interface and functions monitored are:
force on each corner.
resistance force on each corner
motion - in inches from bottom.
motion - in the same units.
- to the cushion control valves.
- of cushion pre-accelerate command.
(Click Image for Full Screen View)
cushion monitor system is set up to completely monitor all the forces and
motions of the draw press, and
it's cushion, and presents the information in easy to understand graphical
fashion. The signals can be overplayed in the screen in any fashion that
communicates the greatest benefit to the operators of the machine:
|The valve signal monitoring
feature gives the machine repair a quick way to diagnose and localize
component failure in case of system malfunction. The slide/cushion
motion screen capture is shown to the right. Note the clear indication of the late timing of the
pre-accelerate trigger in relation to the closure point of the Slide and
screen to the right illustrates the graphs of the monitored signals from
one press corner. Note the concurrence between the cushion force, and the slide
force at the beginning of the cycle.
module can handle measurement inputs in groups of 8 up to 56 total points.
This system is provided installed and can be packaged to meet the customers
needs although usually we provide it packaged with a /PPB
and install the terminations using /TEB inside the
press control enclosure.
technologies can supply a
wide variety of solutions to various manufacturing process problems dealing with
measurement, verification of properties, tool condition, and machine health.
We can also “close the loop” by performing process adjustments in
response to specific variations in force, location, or shape of the work piece,
as well as more simple controls which can track and reject specific parts which
don’t meet specific quality criteria.
For a .pdf file copy of this bulletin please click here.