TPT July 2007

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Technology Update
42 July /August 2007
HighQualityRFComponents for PipeWelding
No need to multi-source your electronic components...Richardson Electronics has them all!
Richardson Electronics, a global provider of engineered solutions, is your complete source
for RF components used in pipe welding. For decades, the pipe welding industry has relied on Richardson
Electronics' vast inventory of high quality, RF welding components. Contact a sales representative today with
your requirements and discover the extensive inventory of RF tube and pipe welding components Richardson
has to offer.
industrial.rell.com • (630) 208-2200 •
• High Power Oscillator Tubes -
Richardson carries a wide selection of power
grid tubes. Some popular tube types include:
AX3060CJ (replaces RS3060CJ)
AX3150CJ (replaces RS3150CJ)
AX3300CJ (replaces RS3300CJ)
AMK60-2 (replaces ITK60-2)
AMK120-2 (replaces ITK120-2)
YD1202 (replaces BW1184J2)
YD1212 (replaces BW1185J2)
RS3500CJ
• Technical Assistance - We offer FREE
seminars focused on RF heating. Contact us for
details on the next seminar in your area. Our
engineering team is ready to help you.
Visit
for a complete listing of our 70 worldwide locations.
• Capacitors - Ceramic, Vacuum, Oil-filled,
Mica, Film and Electrolytic. Some popular
types include:
TWXF Series
DB Series
PD, PE, & PS Series
19L Series
HT57 Series
CVDP Series
804 Series
• Impeders - Direct more RF power to your
weld by using National impeders. Ferrite cores,
casings, and coils are also available.
Visit our on-line Impeder Design Center at
MK Products, USA, has launched the
CobraMig® 400P, a pulsed MIG welding
power source that works
with the Cobramatic
wire feed push-pull
technology. Exclusive
CobraMig 400P software
algorithms allow for hard
wire and aluminium
welding when using the
Cobramatic wire feed
cabinet (Model 150-006).
Wave pulse functions
of the CobraMig 400P
enable TIG-like welds on
aluminium. Wave pulse
utilises superimposed
low frequency pulse for
hard and soft aluminium,
which has been proven
to reduce porosity and crack susceptibility.
The frequency of wave is adjustable from
0.5 to 30Hz.
Wire feed speed, amperage and arc
voltage are commanded by the wire speed
potentiometer in the push-pull welding gun,
Purging system saves time
and gas in large pipe and
vessel welding
Large pipes and vessels can be purged
of air quickly and easily – with reported
savings of up to 90 per cent in purge gas
requirements – using the Argweld ® Quick
Purge from Huntingdon Fusion Techniques,
UK. According to the company, the system
will typically purge a 914mm diameter pipe
to below 0.1 per cent oxygen in less than
ten minutes, with faster purging for smaller
pipes.
Savings in time and purge gas consumption
are achieved by reducing the volume purged.
Two inflatable dams are positioned inside
the pipe, restricting the length of the purged
section to approximately 75mm on each
side of the weld. At the same time, a sleeve
joining the dams occupies most of the pipe’s
diameter, so that only the space between
the outer surface of the sleeve and the inner
surface of the pipe needs to be purged.
When the Argweld Quick Purge has been
positioned inside the pipe, by using pull
tags, it is inflated by the inert gas supply so
Specialised power source for Cobramatic push-pull systems
The CobraMig 400P is
rated at 60 per cent duty
cycle in Standard DC and
50 per cent in Pulse DC
at 400 Amps maximum.
Automatic three-phase
voltage sensing allows
for either 208/230VAC
or 460VAC at 50/60Hz
input. Air or liquid cooled
Cobra guns can be
connected and used on
the Cobramatic cabinet.
MK Products also
manufactures MK
Orbital™ tube welding
systems for exotic alloys and Aircrafter™
table-top rotary positioners.
MK Products – USA
Fax: +1 949 472 1428
Email:
Website:
› The new CobraMig 400P pulsed MIG
welding power source from MK Products
while wave pulse and arc control are easily
adjusted via the CobraMig 400P operation
panel.