TPT November 2008

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November 2008 36
Technology Update
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With its new PQF® roll dressing machine,
SMS Meer is offering international tube
producers a further tool for highest cost-
efficiency in seamless tube production.
A PQF® roll dressing machine has recently
been built for the 18" seamless tube plant at
TPCO (Tianjin Pipe Corp), China.
The machine is designed for
dressing the roll grooves of
the three rolls in the PQF®
mill cartridges with the rolls
assembled in the cartridge.
The aim of this development is to eliminate
the time-consuming work of removing
the rolls from the cartridge for single roll
dressing on a standard lathe. It is also
designed for reinstalling the rolls in the
cartridge and roll position checking in a
dedicated calibrating stand.
The benefits of this roll dressing machine
are time reduction, cost reduction (as there
is less manpower required), overall space
reduction in the roll workshop, and absolute
precision of the roll grooves for optimum
tube tolerances.
PQF® roll dressing machine
The roll dressing machine mainly com-
prises a horizontally displaceable tool head
(carriage) with 3 CNC axes. It also has a
rigid housing arranged in a vertical plane
into which the cartridge with the three
assembled rolls is inserted and aligned
for machining by means of hydraulic
cylinders.
The housing contains the three roll drives
to provide the necessary roll machining
speed (with automatic control of power and
torque), and the electro-mechanical device
for adjusting the position of the three rolls.
A linear transducer detects the roll position
and transmits the data to the PQF® hydraulic
capsule control system.
Machining is performed individually for
each roll using different tools and in several
passes, for roughing and finishing of the roll
groove and shoulder profiles.
SMS Meer – Germany
Fax: +49 2161 350 1862
Email:
Website:
 The PQF® roll
dressing machine
Detecting every flaw on
tube, bar and wire
Controle Mesure Systemes (CMS), a
manufacturer of eddy current inspection
systems, provides a full range of equipment
for the inspection of wire and bar, tube and
pipe, plate, sheet and automotive parts. The
company’s products can be used online and
offline, and meet quality standards such as
API, ASTM and DIN.
The new is one of the smallest
instruments on the market, and offers