TPT November 2008

T echnology U pdate

PQF ® roll dressing machine

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.

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

 The PQF ® roll

dressing machine

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.

SMS Meer – Germany Fax : +49 2161 350 1862 Email : info@sms-meer.com Website : www.sms-meer.com

Detecting every flaw on tube, bar and wire

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.

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.

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 Zet@Master is one of the smallest instruments on the market, and offers

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N ovember 2008

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