TPi October 2008

developments products &

Endworking of pipes realised by powerful CNC machining units

The flexible endworking of pipes and tubes is crucial for the production process. Arla Maschinentechnik GmbH builds CNC controlled endworking machines which are available for single sided and double sided machining. The machine concept is based on a solid frame with one or two precise machining units including a unique concentric workholding technology. The machine can be compared to two separate CNC lathes, operated independently for every side of the workpiece. The principal difference is that this endworking concept comprises a fixed workpiece and revolving tools. All machining units are directly driven by servomotors and are therefore very stiff, powerful, and designed for high torques. In order to realise several machining steps, the units are built with integrated motor spindles and optionally available tool changing systems. Typical applications are turning, facing, planing, tapping, threading, chamfering, boring, drilling, milling and deburring. The new series of Arla spindle units can be used either with HSK interface or with integrated facing heads. The machining of complex contours with a single tool system is usually realised by

Arla machining unit with facing head

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centre. A new option allows workpieces to be clamped but also held in a special release position for radial and axial adjustment purposes. Arla Maschinentechnik GmbH – Germany info@arla.de www.arla.de Tubes from Ukrainian-British joint venture Slavsant Tube & Pipe Works, a Ukrainian-British joint venture, produces steel welded tubes for plumbing, construction systems, building and metal constructions. The tubes are produced according to national standards GOST 8645-68 and GOST 8639-82. Products available for export range from 20 x 20 x 1.5-20, to 120 x 120 x 3.0-4.0. Delivery of tubes is possible by railway, automobile transport and via Azov and Black Sea ports – Mariupol, Berdyansk, Odessa and Ilyichevsk. JV Slavsant – Antratsit Tube & Pipe Works – Ukraine slavsant@rambler.ru Tubes are delivered in 6-12m lengths, in Eurostandard packing.

facing heads which are implemented in dedicated machining units.

The clamping systems used in Arla’s endworking machinery are available as independent units, either pneumatically or hydraulically actuated. Depending on the model size, the maximum outer diameter is between 5 and 410mm (maximum pipe size ¼" to 16"). Due to the mechanically synchronous and fast clamping technology, a high clamping force of between 10 and 175kN is achieved.

Changeable jaw sets are used to reduce the diameter without readjusting the

Stainless steel products from China Zhejiang Taigang Stainless Steel Co, Ltd, located in Pengyue Industrial Zone of Taishun County of Wenzhou, is one of the largest manufacturers in Zhejiang province.

The company specialises in stainless steel pipes and tubes, stainless steel rods, stainless steel wire rods and other related products.

Covering an area of 100,000m 2 , with more than 500 employees, the annual output is over 90,000 tons. The company has a 25MT GOR converter stove, 25MT intermediate frequency stove, 25MT AOD refining stove, 15 sets of 10-150MT cold drawn production lines, and mechanical test, ultrasonic test, eddy current test, hydraulic test and spectrograph equipment imported from Germany. The company passed ISO9001:2000 certification in 2005.

Zhejiang Taigang Stainless Steel Co, Ltd – China tgbxg@china-taigang.com • www.china-taigang.com

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Tube Products International October 2008

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