News
Technology
May 2014
39
Modern welding technology has to
be efficient, reliable and cost effective
in order to help wire and cable
manufacturers improve productivity and
avoid downtime.
Although cold pressure welding is an
ancient method of joining metals that
dates back to the Bronze Age, it remains
popular today. The process is quick,
clean and easy. It creates permanent
bonds without heat, flux or fillers and
the electrical integrity of the join is not
affected. Cold welding is equally effective
on fine wire and large rod sections, and
can be used to join most non-ferrous
materials, as well as various alloys.
British company PWM, which celebrates
its 30
th
year of service to the wire and
cable industry in 2014, is a specialist
designer, manufacturer and supplier of
cold welding equipment. The company,
which has been at the forefront of cold
welding technology for many years,
designs and builds its high-performance
machines and dies in-house to exacting
quality standards.
PWM cold welders are durable, reliable
and accurate. They are built to last: one of
PWM’s first P500 models, manufactured in
1985, is still working.
The dies play a major role in the cold
weld process. PWM’s are individually
hand-made in matched sets to ensure
complete accuracy. They can be made in
industry standard or custom sizes to suit
round or profile wire and rod, and PWM
can produce dies to weld two different
sizes of material together if required.
PWM manufactures cold welders for
a variety of applications, from small,
hand-held manual machines suitable
for joining fine wire 0.1mm diameter, to
large, freestanding rod welders capable of
bonding rod 30mm diameter.
All PWM machines are precision
engineered
to
produce
reliable
consistent welds stronger than the
parent material, helping manufacturers
avoid downtime, save materials and
improve productivity.
Clean, quiet and easy to operate, PWM
cold welders are user-friendly, enabling
even untrained operatives to produce
consistent high quality welds.
The company’s best-selling models are
the EP500 rod welder and the M101
manual cold welder, which can be used
on a workbench or with a trolley.
For smaller wire sizes, 0.1mm to 1.8mm,
PWM manufactures hand-held manual
machines, suitable for joining wire
breaks in confined spaces, as well as
larger machines that can be used on a
workbench or supplied with a trolley.
Cold welding can be used to join
dissimilar
materials,
for
example,
aluminium to copper, and materials of
different sizes.
PressureWelding Machines Ltd – UK
Website
:
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▲
The P1500 electrohydraulic rod welder from PWM
Cold connections for stronger welds
Gi recently redesigned and improved the Gi-100 with the
Gi-100DT, which features a dial table style glass top, allowing
stability of the parts. This allows for better image analysis,
data capturing and precision.
The Gi-100DT is primarily used for sorting flat parts that have
more than a 2:1 length to diameter ratio – nuts, valve spring
retainers, rivets, bushings, washers, etc – all at up to 1,000
parts per minute (though most parts average closer to 400
parts per minute).
Multiple sensors can be added to the Gi-100DT, including
eddy current, multiple vision stations with Gi speciality
lenses and laser topography. Eddy current ensures the check
for metallurgical defects such as cracks, missing plating or
hardness variations.
Vision stations can be added to detect defects like chips in the
ID, missing internal threads and even damaged threads on
deep threaded holes, nylon ring presence, chips in grooves,
cracks, missing or damaged weld projections and missing
crimp. The newest sensor, laser topography shows a 3D profile
of the parts and can measure diameters, heights, as well as
find defects like chips, dents and flatness.
The Gi-100DT is used to inspect 100 per cent of the
production. This instrument of lean, sorting machine, has
great flexibility to sort a wide variety of parts. The Gi-100DT
with its array of patented and patent pending sensors allows
customers to achieve zero defects and realise improvements
in the manufacturing process, reduction in variation, and
improved profitability.
General Inspection LLC – USA
Website
:
New and improved Gi-100DT
