TPT March 2010

S traightening T echnology and E quipment

New sizing, shaping and straightening section for ERW tube mill

driven passes. Only a simple turkshead is used for detwisting and straightening purposes. As all the rolls are driven, it is possible to shape welded tubes up to the maximum thickness allowed in the tube mill for rounds, expanding the usual range of the mill capabilities. It is also possible to size round tubes. In each case (rounds, squares and rectangulars), only eight rolls per size are needed, instead of the usual 12 rolls used in the most common configurations. Additionally, shaping rectangulars and squares can be performed using the same tooling, designed as a combination roll set. Another advantage is having the sides of squares and rectangulars in a vertical or horizontal position. The welding line remains in the centre of the upper side, resulting in all corners of the shape having the same radius and aspects.

TUBOTRON Srl, Argentina, has introduced a new section with a special configuration of four stands inclined 45º, two to one side and

the other two to the other of the centreline of the tube mill. All are driven passes and no idler passes are necessary between the

Machinery from Argentina’s Tubotron Srl

Tubotron Srl – Argentina Email: tubotron@gmail.com

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M arch 2010

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