Philips Lighting HQ6640 - Manual (Page 7)

5
paintwork
The paint process generally consists of a cleaning
and pre-coating line, a primer coating line, the
sealing line where the body is made watertight by
flexible seals, a wet or dry sanding preparation line,
the first color coating line, the second and final
coating line, and lastly the repair line. The process
is continuous, partly automated and cars of
various colors are produced in random order.
Apart from the process control task, manual
activities consist of the application of a sealer,
spraying in paint cabins, sanding and minor body
repair work, paint inspection and final paint repair.
Most visual tasks can be classified as difficult:
glossy large and non-uniform surfaces have to be
checked for small faults. The contrast between
highly reflective surfaces and the surroundings is
small. By definition, brightness ratios should not
be optimized especially for black, white and
metallic-colored cars.
Lighting recommendations
Illuminance Outside paint cabin: 150 lux
Transport corridors: 300 lux
Working zones: 500 lux
Inspection: > 1,000 lux
Uniformity E min / E ave > 0.5
E
min
/ E
ave
> 0.8 (inspection)
Luminance Limited
Color temperature Neutral / cool white
Color rendering R a
≥
80
R
a
≥
90 (color comparison)
The lighting designer should ensure high surface
illuminance with good uniformity in the horizontal,
vertical and relevant sloping planes. For optimal
viewing conditions, glare should be limited as much
as possible by screening off the light sources with
optics or white louvers. Color rendering is also
important, as workers must be able to detect
production errors at an early stage.
Typical lighting installation
For general lighting in service areas of the paint
shop, white-painted reflectors can be used,
preferably aluminium-reflector wide beam ones.
Closed, ingress-protected luminaires are needed
near the production process. Protected luminaires
with optics are required where special lighting
effects can improve viewing conditions. The lighting
installation needed to illuminate the paint cabins
should be accessible from outside the paint cabin.
Maintaining the luminaires from the outside ensures
minimal interruption to work as well as reducing
pollution. If luminaires are required inside the paint
cabin, explosion-proof types should be specified.
It is important to use easy-to-clean luminaires
where a high level of soiling is present with
smooth surfaces that can easily be wiped clean.
A
U
T
OMO
TIVE INDUSTR
Y LIGHTING