TPT September 2007

T ube M ills: R olling & F orming M ethods

hot tube reducing process does not depend on temperature, it can be comprehensively used in the cold tube reducing process. Analysis of the data obtained from the new tube reducing technology makes it possible to claim that this method is highly competitive when compared to other technology (eg drawing or rolling in the cold tube rolling mills). The new tube reducing technology is considerably more productive in comparison with conventional technology. It is capable of attaining a wall thickness reduction of up to 75-80 per cent while using less stands (10-15). It can be concluded that when taking into consideration the advantages and potential of the new tube reducing technology, its use is technically expedient and economically advantageous. This article was supplied by FD Davydov (senior specialist), L Ksaverchuk (general director) and N Koryaka (specialist), Ukrtruboprom Association Ukrtruboprom Association – Ukraine

Latest deburring and welding systems for tube mills

Kent, USA, has developed a new Burrmaster model to complement its line of tube end deburring machines. The new system is designed to remove the burr from tube ends, rollform shapes and welded shapes. The machine is manually loaded and deburrs one end at a time. The steel deburring brushes rotate at high rpm, while the whole brush head slowly rotates a full 360º to deburr every edge and corner. The burrs from cutoff saws and shear blades are removed for safer part handling. Larger, more automatic machines are also available. The large machines can be loaded directly from the mill or manually into a magazine. The parts are then picked up one at a time and transferred through the machine by chain driven fingers. Both ends are deburred at the same time, at speeds of up to 3,500 parts per hour. Kent has also developed a new double cut coil end welder for tube mill and strip

process lines. The new version of the model DSAA coil joiner was developed to endure demanding tube, pipe and process line applications. The heavier edge guides, shear and new torch guiding system can be cycled two to three times as much as older designs. The coil ends are both sheared at the same time, and indexed together to reduce cycle time. Automatic TIG welds easily pass through press and rollform tooling. By welding coils together, downtime is reduced when set against re-threading of the process line. Scrap and tooling damage is also reduced on press lines. For less demanding applications, portable coil end welders are available up to 15" wide.

Kent Corporation – USA Fax : +1 440 230 9608

Email : info@continuouscoil.com Website : www.continuouscoil.com

Fax : +380 56791 1701 Email : trubpr@ptcor.net

ITALY–Tel: +39(0) 536 851616 – e-mail: info@apollosrl.com www.apollosrl.com N.C. punching lines for tubes and profiles

MADE TO MEET EVERY REQUIREMENT

WE’LL BE AT EMO Pad 15-Stand D72

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S eptember /O ctober 2007