3 Fundamentals of press design

Sheet metal forming lines
Local operating units are equipped with all the necessary functions
related to the operating station in question.
Central control functions such as preselection of operating modes,
main drive system ON or start of die change, are executed from the central
control desk. In machines delivered to US automobile manufacturers,
pendent control units are frequently mounted along the length of
the press which allow central control functions to be made available
locally to operating staff.
Alongside the classical operating and display elements such as pushbuttons
and pilot lamps, modern operating systems for complex lines
frequently make use of color graphic visualization systems. Depending
on the level of complexity of the visualization system, industrial PCs or
compact, intelligent operating terminals with graphic capability are
used in local control panels.
The visualization system is used for user prompting and guidance
during start-up, operation and monitoring of the equipment, and also
for troubleshooting and diagnostic functions. Figure 4.4.44 indicates
– productiondata
– errorandstandstillsignals
logging
– diedata
– machinedata
– errormessages
lineoperation
– ready-to-runsynoptic
o er iew, oom-in
– operatorpromptsynoptics
– statusdisplays
– diechangesynoptic
– lineo er iew
communication
– withthelinecontrolsystem
– withhigher-le elsystems
isuali ation
system
diedata
– dieinde
– diedatainput display masks
– diedatastorageand
management
– limit aluecheckoninput
machinedata
maintenance
instructions
– reelyprogrammable
maintenanceinstructionswith
inter al strokesperhour
errormessages
– displayofcause,errortype
anderrorlocation
te tandgraphics
machinedata
– machinedatainput display
masks
– machinedatastorage
Fig. 4.4.44 Functions of the visualization system used on large-panel presses
Metal Forming Handbook / Schuler (c) Springer-Verlag Berlin Heidelberg 1998
259