Telwin PTE 18, Instruction Manual, Page: 5 / 92

1.GENERAL SAFETY RULES FOR RESISTANCE 5. INSTALLATION .........................................................
6
5.1 PRELIMINARY OPERATIONS ................................................ 6
WELDING ...................................................................
5
5.2 LIFTING THE SPOT-WELDER.................................................. 6
5.3 POSITION ................................................................................. 6
2. INTRODUCTION AND GENERAL DESCRIPTION ..
6
5.4 CONNECTION TO THE MAIN POWER SUPPLY .................... 6
2.1 INTRODUCTION ..................................................................... 6
5.4.1 Warnings ....................................................................... 6
2.2 OPTIONAL ACCESSORIES ..................................................... 6
5.4.2 Connecting the power supply cable to the spot-welder... 7
5.4.3 Plug and socket .............................................................. 7
3. TECHNICAL DATA ...................................................
6
5.5 PNEUMATIC CONNECTION .................................................... 7
3.1 RATING PLATE.......................................................................... 6
5.6 CONNECTING THE COOLING CIRCUIT ................................. 7
3.2 OTHER TECHNICAL DATA ....................................................... 6
6.SPOT WELDING ........................................................
7
4. DESCRIPTION OF THE SPOT-WELDER..................
6
6.1 PRELIMINARY OPERATIONS .................................................. 7
4.1 SPOT-WELDER ASSEMBLY AND DIMENSIONS ..................... 6
6.2 ADJUSTING THE PARAMETERS............................................. 7
4.2 CONTROL AND ADJUSTMENT DEVICES............................... 6
6.3 PROCEDURE ........................................................................... 7
4.2.1 Control panel.................................................................... 6
4.2.2 Compression nut .............................................................. 6
7. MAINTENANCE .......................................................
7
4.3 INTERLOCK AND SAFETY FUNCTIONS................................. 6
7.1 ROUTINE MAINTENANCE ....................................................... 7
4.3.1 PTE Models...................................................................... 6
7.2 EXTRAORDINARY MAINTENANCE ........................................ 7
4.3.2 PCP Models ..................................................................... 6
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INDEX
ENGLISH
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- Always protect the eyes with suitable eye protectors.
- Wear protective gloves and clothing suitable for resistance welding work.
- Noise levels: If the personal daily exposure level (LEPd) is found to be greater
APPLIANCES FOR RESISTANCE WELDING FOR INDUSTRIAL AND
than 85db(A) due to particularly intensive welding operations, wearing
PROFESSIONAL USE
personal protection devices is compulsory.
Note: In the following text the term “spot-welder” will be used.
1. GENERAL SAFETY RULES FOR RESISTANCE
WELDING
# $ %
( &
- The strong magnetic fields generated by resistance welding processes (very
high currents) may damage or interfere with:
The operator should be properly trained to use the spot-welder safely and should
- CARDIAC STIMULATORS (PACE MAKERS)
be informed of the risks connected with resistance welding procedures, of related
- ELECTRONICALLY CONTROLLED IMPLANTED DEVICES
protection measures and of emergency procedures.
- METAL PROSTHESES
(Only for pneumatic cylinder-operated versions) The spot-welder is provided with
- Data transmission or local telephone networks
a main switch with emergency functions, fitted with a padlock for locking it in the
- Instrumentation
“O” (open) position.
- Clocks and watches
The padlock key should be handed over only and exclusively to an expert
- Magnetised cards
operator or to an operator who has been trained for the tasks assigned to him and
WEARERS OF VITAL ELECTRICAL OR ELECTRONIC DEVICES AND PEOPLE
has been warned of the possible hazards arising from this welding procedure and
WITH METAL PROSTHESES SHOULD NOT BE ALLOWED TO USE THE SPOT-
from neglectful use of the spot-welder.
WELDER.
When the operator is absent the switch should be set to the “O” position, the
SUCH PERSONS SHOULD TAKE MEDICAL ADVICE BEFORE STOPPING IN
padlock should be closed and the key removed.
THE VICINITY OF SPOT-WELDERS AND/OR WELDING CABLES.
- This spot-welder complies with all requirements of the technical standard for
- Electrical installation should be carried out following accident-prevention
the product, which to be used only and exclusively in industrial environments
legislation and standards.
and for professional purposes.
- The spot-welder should be connected only and exclusively to a power supply
Electromagnetic compatibility with a domestic environment cannot be
with the neutral conductor connected to earth.
guaranteed.
- Make sure the power supply outlet is correctly connected to the earth
protection.
- Do not use cables with worn or damaged insulation or with loosened
connections.
RESIDUAL RISKS
- Do not use the spot-welder in damp or wet environments or in the rain.
- When connecting the welding cables or carrying out any routine maintenance
- RISK OF UPPER LIMBS BEING CRUSHED
operation on the arms and/or electrodes the spot-welder should be switched Both the operating method for the spot-welder and the variability in shape and
off and disconnected from the power supply. Pneumatic cylinder-operated size of the piece being welded make it impossible to provide integrated
spot-welders should be locked with the main switch in the “O” position and the
protection against the danger of the upper limbs being crushed: fingers, hands,
padlock closed.
forearm.
The same procedure should be followed when making connections to the
The risk should be reduced by appropriate preventive measures:
water supply or to a closed circuit cooling unit (water-cooled spot-welders)
- The operator should either be expert or trained in resistance welding
and whenever repairs are made (extraordinary maintenance).
procedures using this type of appliance.
- There should be risk evaluation for every type of job to be done; equipment
and masking should be provided to support and guide the work-piece
(unless a portable spot-welder is used).
- Whenever the shape of the piece allows it, adjust the electrode distance so
that the stroke does not exceed 6 mm.
- Do not allow more than one person to work on the same spot-welder at the
- Do not weld on containers, receptacles or piping that contain or have
same time.
contained flammable liquid or gas products.
- Unauthorised persons should not be allowed in the working area.
- Do not operate on materials cleaned with cholorinated solvents or near such
- Do not leave the spot-welder unattended: in such a case it should be
substances.
disconnected from the power supply; for pneumatic cylinder-operated spot
- Do not weld on pressurised containers.
welders turn the main switch to “O” and lock it with the supplied padlock,
- Remove all flammable substances from the work area (e.g. wood, paper, rags
take out the key and leave it with the person in charge.
etc.).
- Make sure there is sufficient ventilation or provide means for removing
- RISK OF BURNS
welding fumes near the electrodes; a systematic approach is necessary to
Some parts of the spot-welder (electrodes arms and nearby areas) may reach
evaluate limits of exposure to the welding fumes depending on their
temperatures of over 65°C: suitable protective clothing must be worn.
composition and concentration and on the length of exposure.
- RISK OF TIPPING AND FALLING
- Place the spot-welder on a level horizontal surface that is able to support its
weight; confine the spot-welder to the support surface (when required in the
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