TPT January 2010

T echnology U pdate

New concept tube finishing equipment

diameters achievable currently range from 1.9" to 20" according to the machine model. The state-of-the-art technical solutions and the innovative design of thread cutting head and tool holders guarantee an excellent utilisation factor, even with the most varied product mix. The tube threading machine carries out facing, chamfering on internal and external diameters, taper turning and threading on both internal and external diameters, and thread de-burring. Until today, most production of premium joints was only possible by using lathes, working with the pipe rotating. Lathes permit the creation of all thread profiles, but have a major disadvantage that they have low production rates due to the handling of the tube and due to the reduced cutting speed which is limited by the rotation speed of the tube itself. The innovative Danieli Centro Maskin design of the thread cutting head and of the tool holders guarantees the same flexibility as a lathe, but ensures a considerably higher production rate (up to 185 pieces per hour). The coupling threading plants consist of two twin thread cutting heads, each one performing the complete production cycle on one half of the coupling. Such machines can work independently or can be supplied together with non destructive testing, marking, phosphatising and painting equipment integrated into a completely automatic line, without the need of intermediate storage areas. An excellent thread quality is obtained since the work piece is held rigidly in position during the entire working cycle, from the loading to the unloading operation. As with the tube threading machines, the innovative design of the tool holders allows the production of premium joints with a very high output, compared to the alternative lathe technology (up to 130 pieces per hour). Danieli Centro Maskin also offers the following auxiliary tube finishing equipment: • facing and bevelling machines • coupling starter, screw-on and full stroke drifting units • rotating tools/rotating pipe cut-off machines • OD and ID protector applier units. The above machines can be integrated into complete tube manufacturing plants supplied by Danieli, or also as stand alone

DANIELI Centro Maskin is a branch of Danieli & C SpA, one of the three worldwide largest suppliers of equipment and plants to the metals industry. As an integral part of the production process of seamless and welded tubes and pipes, Danieli Centro Maskin is able to supply a wide variety of equipment, both in the hot rolling and finishing areas. Danieli Centro Maskin has supplied 156 carbide-tipped circular saws plants for various applications in the steel industry since the mid-1950s, with 37 machines awarded in the last five years, acquiring a consistent market share worldwide. The carbide tipped saws can be used for cutting bars upstream of the re-heating furnace, for cutting of layers of pipes into length downstream of the cooling bed, and

finally also for cutting of blank couplings in the finishing shop. In case of single piece cutting the maximum diameter processed is 810mm, with maximum layer width of 1,500mm. The elimination of vibrations, the measures taken to increase the blade life, the stable movement of the cutting head, and the precise cutting control, allow a high productivity (50 seconds to cut a 300 mm round bar of C45, HB 200) and an excellent utilisation factor of the cutting equipment. Danieli Centro Maskin has recently completed the design of a range of innovative, CNC threading machines for both tubes and couplings. The finished threaded products fully respect API and GOST standards, with the capability also to produce premium threads. The thread

The Danieli carbon tipped saw

units in existing plants. Danieli & C SpA – Italy Fax: +39 0432 1958082 Email: dcmk@danieli.it Website: www.danieli.com

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J anuary 2010

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