WeldLogic Technology - Adaptive Multipass Welding Technology
WeldLogic Technology - Adaptive Multipass Welding Technology

The Inrotech-Big9 represents the most advanced robot welding technology.

This solution is designed for the welding of pipe structures like jackets for the off-shore industry, but can be used for the welding of almost any pipe joints: Y, T or butt joints.

Although highly advanced, the operation still is very simple, as the robot by itself identifies the pipe positions and dimensions (including material thickness). The weld groove is measured by means of a line scanner, after which the welding proceeds fully automatic, until the joint is filled up according to standard- no matter the big variation in the weld groove


The name of our newest welding robot “Inrotech-Big9” says it all. It is BIG. Together with KUKA we have developed this unique 9-axis robot. From a large robot we use only the first 3 axes, upon which a smaller 6-axis robot is installed. The robots acts like one 9-axis robot and is controlled by one single robot controller.

The Inrotech-Big9 welding robot is installed on a portable frame with safety measures in terms of area scanners and a physical frame. It is equipped with the most advanced WeldLogic technology.


The Inrotech-Big9 welding robot is specifically targeting Y and T joints on larger pipe structures. This could be offshore jackets for wind towers, oil platforms pipe connections and a various of other products with similar pipe-connection designs.

Further, the Inrotech-Big9 welding robot is able to perform butt welding of pipes (up to ø2m) and butt-welds of plates within reach of the robot (approx. 3 m).


Two Inrotech-Big9 robots are used in operation simultaneously.

After having been placed in a proximate working position, the robot platform automatically levels itself. 

Upon initiating the process by pressing the button,  the robots are determining the position, angle and diameter of the tubes by means of a laser sensor.  Successively the joint/weld groove is scanned by the line scanner.

From the image created by the scanner, the full welding procedure is calculated by the Weldplanner, which is the brain of the system.

The welding now commences synchronously by the two robots, starting and stopping hot-in-hot.

Variations in the weld groove geometry are compensated for by adjusting the welding parameters on the fly, or inserting extra passes where needed.

From start to stop - no further input is needed from the operator.

Questions or need more details? 
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