TPT July 2007

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S traightening & Finishing Technology
67 July/August 2007
Rafted sizing and powered
squaring mill
Addison Machine Engineering Inc, USA,
has introduced the PSU-8000 rafted sizing/
powered squaring mill. The mill provides
two features that simplify changeover and
setup and provide greater operator safety.
The outboard roll stand base has a built-
in air bearing, making it possible for one
person to easily remove the stand during
roll changeover. In addition, the single point
adjusters on each roll simultaneously position
both front and rear side rolls, and individually
position the driven rolls at the top and
bottom. All roll adjustments are made from
safe and convenient access points on the
front of the unit with digital position indicators
providing precise roll position to 0.001".
The powered sizing/squaring section is
suitable for sizing round tube diameters of
3" to 7.625". It can also reshape rounds into
square tube up to 6" x 6" and rectangular
tube up to 2" x 10".
The PSU-8000 can be integrated into an
existing tube mill or operated offline as an
independent process. When operated as a
separate process, the PSU-8000 is suitable
for producing small quantity orders without
interfering with the tube mill rolling schedule.
Addison Machine Engineering designs,
manufactures and reconditions tube, pipe,
rollform and steel mill roll tooling (including
single and two-piece straightener rolls) and
mill components, as well as complete tube
and pipe mills and rollformers.
Other services include equipment rebuilding
and retrofitting, operator training, mill
alignment and technical consulting.
Addison Machine Engineering Inc – USA
Fax: +1 608 524 6099
Email:
Website:
Protem, Germany, a manufacturer of
a broad range of tube cutting and pipe
bevelling machines, has developed the
CTA-series for processing pipes with
diameters ranging from 2" to 36", based on
any established steel grade.
The machines in the new range
were specially designed for industrial
application, and can be integrated into a
complete production line to meet specific
requirements.
Cutting and bevelling can be carried out
simultaneously. Programmable tube lengths
are possible, with control panel adjustment
of tube diameters for identical bevels.
The rotation speed of the bevelling tool bits
can be adjusted with a frequency inverter
according to specific diameters, wall
thickness and steel grades.
The machines are equipped with two
precise, concentrically acting clamping
systems, enabling different manufacturing
processes to be accomplished
simultaneously.
Clamping is performed automatically due to
pneumatic pressure monitoring, while either
two or four tool holders enable different
processing possibilities. Transparent
windows on each side, controlled by
sensors, allow the operator to monitor the
working procedure.
Protem GmbH – Germany
Fax : +49 7247 94 68 62
Email:
Website:
High performance rolls for straightening lines
The cold straightening process can be applied to many products including
longitudinally welded or seamless tube and steel bar, sections and rails. The rolls
used in the straightening processes must possess high hardness and wear resistance
characteristics whilst also offering the lowest possible tendency to pick up.
Rolls manufactured from forged Märker® cold work tool steels are highly suited to these
applications. The breaking rolls are of a one-piece design and made from pre-heat
treated and stress relieved Märker® Zesek. In order to improve the resistance of these
rolls, they can be surface hardened in a special hardening process (depth of hardness:
approximately 10-15mm). This enables the production of rolls with a hard wearing
surface and tough core.
For some applications,
composite rolls are offered
as a two-part design. In
this instance, the working
part of the roll is the shell
manufactured in Märker®
Zesek, fitted to a shaft
constructed from tough heat
treatable steels.
The Schmidt + Clemens
Group supplies a full range
of high precision roll products
for many applications from
its manufacturing plants in
Germany and the UK. The
complete in-house service
includes in-depth technical advice on rolls, roll refurbishment, manufacture of rolls to
samples, design (rolls for production of tubes and cold rolled sections) and development.
S+C Märker GmbH – Germany
Fax: +49 22 66 92 509
Email: –clemens.de
Website:
› The PSU-8000 rafted sizing/powered squaring
mill
Fast and precise pipe conditioning
› Straightening rolls manufactured in Märker Zesek tool steel