Control of Main Electric Equipment
1.1. Pretreatment
When the electric system for pretreatment is in the control state
of "local automation", an operator at the scene will be able to
press the button of "automatic start" on the electric cabinet panel
to start the operation of all the process units automatically and
in an orderly manner.
When the electric system for pretreatment is in the control state
of "local manual", an operator at the scene will be able to press
the start or stop button for the corresponding equipment on the
electric cabinet panel to independently start and stop the
operation of each process unit.
Temperature Control: The pre-degreasing, degreasing and phosphating
processes of the pretreatment system need temperature control,
using temperature control instruments for completion.
1.2. Cathodic Electrophoresis System
When the electric system for cathodic electrophoresis is in the
control state of "local automation", an operator at the scene will
be able to press the "automatic start" button on the electric
cabinet panel to start the operation of all the process units
automatically and in an orderly manner.
When the electric system for cathodic electrophoresis is in the
control state of "local manual", an operator at the scene will be
able to press the start or stop button for the corresponding
equipment on the electric cabinet panel to start or stop the
operation of each process unit independently.
Temperature Control: The process temperature of the cathodic
electrophoresis bath needs controlling, using temperature control
instruments.
Interlocking Control: All the water pumps interlock with liquid
levels. At a low liquid level, the water pumps stop work and the
liquid level signal is sent to PLC, and through the communication
module of PLC, is uploaded to the central control room. The
sprinkler pipeline of each process trough is equipped with a
solenoid valve or motor valve, which through PLC, realizes the
automatic control of all the sprinkling. The electrophoresis
circulation pump shall interlock with the shaft-seal pump. Only
when the shaft-seal pump interlocking is opened may you start the
electrophoresis circulation pump.
1.3. Drying Chamber System
When the drying chamber’s electric system is in the control state
of "local automation", an operator at the scene will be able to
press the "automatic start” button on the electric cabinet panel to
start the operation of all the process units automatically and in
an orderly manner.
When the drying chamber’s electric system is in the control state
of "local manual", an operator at the scene will be able to press
the start or stop button for the corresponding equipment on the
electric cabinet panel to start or stop the operation of each
process unit alone.
Temperature Control: The drying chamber uses burners for heating
with LNG gas, with temperature being controlled by temperature
control instruments.
1.4 Paint Spray Chamber System
When the paint spray chamber’s electric system is in the control
state of "local automatic", an operator at the scene will be able
to press the "automatic start button" on the electric cabinet panel
to start the operation of all the process units automatically and
in an orderly manner.
When the paint spray chamber’s electric system is in the control
state of "local manual", an operator at the scene will be able to
press the start or stop button for the corresponding equipment on
the electric cabinet panel to start or stop the operation of each
process unit alone.
1.5 EMS
When the self-moving cart conveying system is in the control state
of "local automation", an operator at the scene will be able to
press the "automatic start button" on the electric cabinet panel to
start the operation of all the process units automatically and in
an orderly manner.
When the self-moving cart conveying system is in the control state
of "local manual", an operator at the scene will be able to press
the start or stop button for the corresponding cart equipment on
the electric cabinet panel to start or stop the operation of each
cart alone.
1.6 Floor Conveying System (on the ground)
The skid conveying system is a logistics conveying system for
controlling the skid movement of the whole coating workshop as it
carries car bodies to pass various corresponding processes and
undertakes the transport task of the automobile body coating
process on the ground in accordance with the process requirements.
This system’s subsystems controlled include a roller conveying
system, a rotating roller system, various lift systems, a moving
machine system, a chain conveying system, etc.
When the skid conveying system is in the control state of "local
automation", an operator at the scene will be able to press the
"automatic start” button on the electric cabinet panel to start the
operation of all the process units automatically and in an orderly
manner.
