TPT May 2010

T echnology U pdate

Controlling high frequency electric welding WESCO has introduced two new developments to improve the quality of pipes in welding applications. One problem faced by manufacturers of value-added pipes such as water pipes, oil pipelines and structural pipes is how to adjust welding energy when the speed increases. Operators who depend upon their own experience have no exact data, and may have difficulty controlling the speed and adjusting welding energy to the varying speed of the pipes. Weldcom is a system that controls high frequency electric welding to provide uniform welding quality, controlling welding energy as to the change of the speed. The system detects sparks that occur in the short-circuit when welding, and monitors major welding factors such as plate voltage, welding power, speed and departure frequency. Wesco’s new seam annealing automatic tracking system, applied to seam annealing

apparatus in making high quality tubes such as API standard, automatically traces twists on both sides of the seam, which naturally occur during the welding process, and helps smooth heat treatment through automatic tracking. The system detects the seam in the tube, and automatically detects welding spots using both image sensor and tilting

sensor. The image sensor processes image data around welding spots and, based on this data, the tilting sensor detects the seam in the tube. Wesco – Korea Fax: +82 32 582 0725

Email: wesco@wesco.co.kr Website: www.wesco.co.kr

Wesco’s Weldcom controls high frequency electric welding

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