Miller Auto Arc Посібник користувача - Сторінка 5
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SECTION
1
SAFETY
RULES FOR OPERATION OF
PORTABLE RESISTANCE SPOT WELDING EQUIPMENT
1-1.
INTRODUCTION
The
following safety
rules
cover
general
safe
practices
which
as a
minimum should be
employed
when
using
resistance
spot
welding equipment.
Establishment of
an
attitude of
safety
consciousness is
necessary for the
protection
of
personnel
and
property.
Do
not
install,
operate,
or
maintain this
equipment
be
fore
reading
this manual.
1-2.
INSTALLATION
All
equipment
should be installed
by qualified personnel
in conformance with
local,
state,
and federal codes.
1-3.
SAFETY DEVICES
Safety
devices such
as
fuses should
not
be discon
nected
or
shunted
out.
1-4.
PERSONAL SAFETY
Before
installation,
inspection,
or
service of
equipment,
disconnect
input
power and
employ lockout/tagging
pro
cedures
to
prevent
accidental
turning
on
of power.
Always
shut off
power
when
leaving equipment
unat
tended.
Disconnect
provisions
must
be available nearthe
equip
ment.
1-5.
BURN PREVENTION
Wear
long-sleeve
shirt and cuff-less
trousers
in addition
to
gloves,
hat,
and
high
top
shoes. Button shirt
collar,
pocket flaps,
and sleeve cuffs to avoid
entry
of
sparks.
Woolen
clothing
is
preferable
to cotton
because it is
not
so
readily ignited.
Cotton
clothing
if used should be
chemically
treated
to
reduce its
combustibility. Clothing
treated
with
nondurable
flame-retardent
matenals
should be retreated after each
wetting
or
cleaning.
Wear
safety goggles
or
glasses
with side shields. Use
a
face shield for
severe
exposure
to
flying sparks.
Avoid oils
or
greases
on
clothing
which could be
ignited
by sparks
and do
not
use
flammable hair
preparations.
Do
not
handle hot metal such
as
tong
tips
or
workpiece
without
wearing gloves.
1-6.
FUMES
Severe
discomfort
or
illness
can
result from fumes and
vapors
produced by welding.
Use
adequate
ventilation
as
described in ANSI Z49.1.
Lead-, cadmium-, zinc-,
mercury-,
and
beryllium-bear
ing
and similar materials when welded may
produce
harmful concentrations of toxic fumes.
Adequate
local
exhaust ventilation
must
be used for each person in the
area as
well
as
the
operator
must
wear an
air-supplied
respirator.
Both
must
be used when
beryllium
is
in
volved.
Metals coated with materials that emit toxic
fumes
should
not
be heated unless the
coating
is removed
from the
surface,
the
area
is
adequately
ventilated,
or
the
operator
wears an
air
respirator.
1-7.
FIRE PREVENTION
Flying sparks
can
pass
through
cracks, windows, doors,
wall and floor
openings,
and
along pipes.
If
combustibles
are
nearby,
do
not
weld. Move work if
practicable
to
an area
free of combustibles. If work
can
not
be
moved,
move
combustibles
to
a
safe location
or
protect
against ignition
with suitable and
snug-fitting
fire
resistant
covers or
shield.
Walls,
ceilings,
and floors
near
the work
area
should be
fire resistant
or
protected by
fire resistant
covers or
shields.
Do
not
weld where
atmosphere
may contain flammable
dust,
gas,
or
liquid
vapors
(such
as
gasoline).
Do
not
exceed the
equipment
rated
capacity.
After
completion
of work
inspect
area
to
ensure
it is free
of
sparks, glowing
embers,
and flames.
1-8.
PROTECTION OF OTHERS
Workers
or
other persons
adjacent
to
the
welding
area
should be
protected by
noncombustible
or
flame-resis
tant
screens or
shields
or
should be
required
to
wear
suitable eye
protection.
Booths and
screens
should per
mit circulation of air
at
floor level.
1-9.
CORDS
Frequently inspect
for
wear,
cracks,
and
damage.
Im
mediately
replace
cords with
excessively
worn or
dam
age insulation
to
avoid
possibly
lethal shock from bared
conductors.
Keep
cords
dry,
free of oil and grease and
protect
from hot metal and
sparks.
1-10.
HOSES
On water cooled
equipment
examine hoses and
fittings
regularly
for leaks and loose connections.
Repair
or re
place leaky
hoses and
fittings.
Do
not
use
tape
to
repair
leaky
hoses.
1-11.
MAINTENANCE
Remove
leaky orfaulty equipment
from service
immedi
ately
for
repair. Keep equipment
clean and
properly
ad
justed.
1-12.
STANDARDS
INDEX
1.
ANSI Standard Z49.1
Safety
In
Welding
And
Cut
ting,
obtainable from the American
Welding
Soci
ety,
550 Le Jeune
Rd.,
P.O. Box
351040, Miami,
FL
33135.
118583
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