TPT July 2007

S traightening & F inishing T echnology

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.

Fast and precise pipe conditioning

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.

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 : info@protem-gmbh.de Website : www.protem-gmbh.de

The rotation speed of the bevelling tool bits can be adjusted with a frequency inverter

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 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 some

› The PSU-8000 rafted sizing/powered squaring mill

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 : jeff@ameinc.com Website : www.ameinc.com

› Straightening rolls manufactured in Märker  Zesek tool steel

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 : rolls@schmidt–clemens.de Website : www.sc-maerker.de

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J uly /A ugust 2007