TPT March 2007

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28 March/April 2007
Technology Update
Lorch Schweißtechnik, Germany, has
introduced the full digital inverter T-series
for mobile TIG and MMA welding.
The new T-series has been developed for
TIG-welding quality either in the workshop
or in the field.
Available in two versions with 220A as DC or
AC/DC, the machine combines pure power,
high user comfort and perfect welding
results. The ultramodern control concept
is based on the theory of ‘three steps and
weld’, backed up by the Lorch SmartBase
expert database. The ‘T’ calculates the
best welding adjustment with just a few
parameters.
High-grade steel and aluminium railings can
be welded without welding spatters, with
thin seams and a perfect optic. In addition,
with the newly developed Lorch Macs
alternating current procedure, aluminium
can be welded perfectly within a thin sheet
range and also, with Fastpuls, at up to
2kHz. › The T-series TIG welding machine from Lorch
The T-series has a patented Sine-Power
Management system that offers 220A
maximum welding current at 230V mains
without turning off the fuse, even with a
long cable. At only 15kg net weight, the
T-series has a strong duty cycle of 35 per
cent at TIG and electrode welding, and
welding is undertaken without breaks. Due
to the strong construction the T-series also
offers twice as much dropping security
as demanded by law, plus perfect dust
protection.
Lorch Schweißtechnik GmbH – Germany
Fax: +49 71 91 5 03 297
Email:
Website :
Custom-made extrusion lines
for the Russian market
Battenfeld Extrusionstechnik GmbH,
Germany, manufactures tailor-made
extrusion lines for the production of pipes,
profiles and thermoforming sheet.
Russia has developed into one of the
company’s most important export markets,
and it has responded to the rising demand
for high-performance machinery concepts
Rotary sizing mill for online and offline applications
Kusakabe, Japan, an innovative tube and pipe mill manufacturer, is continuing to expand
the applications for the Rotary Sizing Mill concept as an alternative to sizing tube and
pipe with a diameter range from 30-650mm (1.2 to 25.6").
The Rotary Sizing Mill (RSM) concept uses two cages of cylindrical rolls in a planetary
configuration around the tube. The internal diameter of the cage of rollers is set smaller
than the incoming tube. As the cage of rollers rotates around and along the tube, in a
similar manner to a nut on a thread, the tube diameter is reduced.
This technology is being applied to both online applications on tube and pipe mills
and offline applications where the outside diameter needs to be reduced and surface
finish improved. The variable diameter outcome of the RSM makes the machine ideally
suitable for sizing small production runs of odd sized tubes without the need to purchase
extra tooling.
Mr Yukio Kusakabe, executive
director, stated, “The RSM
technology brings a totally new
concept to the ERW, TIG and
laser tube and pipe industry.”
The RSM is a smaller machine
requiring less tooling; the tooling
is of a simple parallel design
that is easy to manufacture and
maintain.
The internal diameter created
by the cage of rollers is infinitely
adjustable within the upper
and lower limits of the cage
configuration. Surface finish
improvements over the original
strip in excess of 30 per cent
have been achieved with roll marks and pick up eliminated, thereby reducing polishing
costs. Tooling wear is less than conventional tooling wear and also benefits from the
absence of wear impact on tube quality or precision.
Improvements in diameter accuracy are achieved and are comparable to drawn tube
capabilities. RSM offers other benefits including reduced energy consumption, floor
space, tooling, maintenance costs, changeover times and scrap.
Kusakabe Electric & Machinery Co Ltd – Japan
Fax: +81 78 992 9139
Email: • Website :
› The Rotary Sizing Mill (RSM) concept is available for a
growing number of applications
Perfect TIG welding in all locations
fi Battenfeld Extrusionstechnik specialises in the
manufacture of extrusion lines