TPT September 2013

Technology News

Saw blades for in-line cutting KINKELDER has developed a smooth cutting TubeMaster saw blade for orbital cut off applications. Its special tooth geometry cuts a large range of thin to thick wall tubes.

Linsinger and SMS. Tubes for oil and gas as well as structural pipes and hollow sections form a primary market for TubeMaster saw blades. Even high hardness materials such as X80 can be cut efficiently thanks to the type of carbide used. The PVD coating protects the tips effectively against the high temperatures being developed during the cutting process. In case of ID-scarfing in the tube making process, the internal weld bead, often about 6mm thick solid steel, remains inside the tube. During cut-off, this inside wire is caught by the saw, causing a huge peak load usually on one saw tooth. This can easily lead to tooth breakage of the saw blade. Kinkelder started developing a new saw in 2010, which resulted in the conception of ScarfMaster ® – a carbide tipped saw blade featuring a very specific tooth geometry, while tips themselves are made of a highly shock resistant type of carbide. The teeth are supported by a saw body with extra strong shoulders, which give the combination tooth/body

very high stability and fracture resistance. “Not only is the blade life of the new ScarfMaster considerably longer, it can also cut 50 per cent faster,” emphasised Mr Molenaar. “Due to this, line speed can be significantly increased. Also, the line does not have to be shut down as often to change the saw blades, which means better uptime. In all regards, the new ScarfMaster saws improve productivity of the tube line, and this automatically reduces cost of production per tube length. There is already a rapidly growing number of enthusiastic tube manufacturers in the USA, Spain, Romania and Poland who use ScarfMaster for their tube lines.” Kinkelder will attend the EMO exhibition in September, on stand D-08 in Hall 14/15. Andorinha, the company’s distributor in Brazil, will attend the Tubotech Exhibition.

“Key features of this TubeMaster ® saw blade are a special carbide grade and a high tech PVD-coating,” said Kinkelder application engineer Leo Molenaar. “This, combined with a special cutting geometry, does not require much force for chip removal, assuring a milled-like finish of the cut surface. This special geometry also reduces vibration when cutting thin wall (<4mm) tubing, thereby achieving an excellent blade life.” This saw blade concept allows the use of one set of blades with medium tooth pitch to cut tubes with wall thickness from 3 to 9mm, and on some machines even up to 12mm. For wall thickness of 9 to 30mm, a coarse pitch is defined. TubeMaster saw blades are available in diameters from 300 to 420mm for all types of orbital cutting machines, such as MTM, Otomills, Elmaksan, Kusakabe,

Kinkelder BV – Netherlands Email: info@kinkelder.nl Website: www.kinkelder.com

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S eptember 2013