TPT March 2018

16-20 April 2018

Strip edging by metal cutting THE efficiency of welding processes depends to a large extent on the quality of the material that has to be machined. In the field of welded tube production, the nature of the strip edge is a key factor for the quality of the final product. At Tube 2018 the Berger Gruppe will present the new generation of Julius strip edging machines. The edge of slit strip is mainly broken and uneven concerning straightness, angle and structure. With strip edge trimming by metal cutting, the edges are clean, straight and true to size. The inner structure is preserved even at the strip surface. The edges are machined with an adjustable angle so that the V angle is reduced for welding and the coating is removed. The cross section that has to be welded is enlarged, and the area that has to be liquefied and the related energy input are reduced. If the slit strip edge has to be a functional edge, then the cut quality of the slit strips does not correspond to the requirement of the processing industry.

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possible to process with thick swarf and to remove a large amount of material in one pass through. The positioning of the hydraulic clamping system in bilateral guide rails and the use of further cylinders have improved the capacity, with the result that the machine processes without vibration, even in high-stress operations. The backlash-free adjustment of the supports ensures easy handling of the machine by the operator and precise pre-setting of the machine. The new Julius strip edging machine is designed for strips with a maximum width of 2,000mm and a maximum thickness of 8mm as standard.

As a result, the tube is welded at higher speed and with less energy input, and the qualities of the welded seam, the welding structure and the tube shape are improved. The Berger Gruppe’s new Julius strip edging machines feature a new concept of support adjustment, and the swarf removal is optimised so that it is

Berger Gruppe – Germany Fax: +49 202 24742 42 Email: info@bergergruppe.de Website: www.bergergruppe.de

Kusakabe continues to provide innovative solutions

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impacts. Kusakabe’s customer feedback and sales enquiries indicate that the demand for these types of tube mills is anticipated to grow worldwide. Laser welding mills for stainless steel is one of Kusakabe specialist products with a large number of mills being supplied over many years. A laser mill supplied by Kusakabe to the USA started operation last year. The forming section of the mill has individual drives on each shaft, which provides a stable forming shape and speed. This is one of the most critical parameters for optimum laser welding quality. A rotary disc cut-off with patented disc holder is used for chip- free cutting and quiet operation. This type of cut-off has a long blade life, cuts difficult stainless steels, and provides a clean environment, which is important for operators. Kusakabe Electric & Machinery Co Ltd – Japan Fax: +81 78 992 9139

Kusakabe recently received an order for an automotive stabiliser tube mill line from a leading automotive tube manufacturer. Boron steel is used in automotive stabilisers and other automotive components due to its very high strength. Special production know-how is required to form and weld boron steel. Kusakabe’s research and development and extensive experience in designing and manufacturing tube mills for this application has made it a specialist in this field. The design of stabilisers is changing from bar to tube as automotive designers reduce the weight of cars, improve safety and fuel efficiency, and reduce environmental

KUSAKABE has successfully installed a precision sizing section to an API 5CT casing line at one of the leading API pipe manufacturers in Asia. This precision sizing section consists of one cassette- type sizing mill, a patented rotary sizing mill and three turks head stands, which are all designed and manufactured by Kusakabe. The Kusakabe four-roll type cassette is of a unique design. Each roll chock is supported by two face plates, and this design increases the rigidity of the cassette and reduces the strain in the structure. These design features result in improved diameter reduction and diameter consistency for the ideal feed material for the rotary sizing mill. Kusakabe’s speciality is the rotary sizing mill, which achieves roundness and reduced spring back at time of cutting – important for API 5CT casing applications. Three turks heads is the optimal number for pipe straightening. The first and third hold the pipe, and the second is used as the point of effect with vertical and horizontal movements that straighten the pipe.

Email: sales@kusakabe.com Website: www.kusakabe.com

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MARCH 2018