TPT May 2010

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Technology Update
May 2010 53 ›
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:
Website:
Wesco’s Weldcom controls high
frequency electric welding