Process and device for the connection of the ends of steel pipes by means of orbital welding using hybrid technique

摘要

The method for connecting the ends of the steel tubes (1) with wall thickness of = 12 mm and diameter of = 150 mm by using orbital welding in laser-light-arc hybrid technology, comprises connecting the ends of the tubes with several welding positions, guiding a laser- and light arc welding head (4, 6) as a tool over a guiding ring (2) fixedly arranged in the area of the welding point during the welding process and then processing around a tube circumference, and separately positioning the laser- and light arc welding head at the guiding ring. The method for connecting the ends of the steel tubes (1) with wall thickness of = 12 mm and diameter of = 150 mm by using orbital welding in laser-light-arc hybrid technology, comprises connecting the ends of the tubes with several welding positions, guiding a laser- and light arc welding head (4, 6) as a tool over a guiding ring (2) fixedly arranged in the area of the welding point during the welding process and then processing around a tube circumference, and separately positioning the laser- and light arc welding head at the guiding ring and then processing and controlling independent of each other over the tube circumference during the welding processes. The process speed and the distance of the laser- and light arc welding head are separately adjusted. Before beginning the welding process, the welding area is preheated by a preheating device in front of the welding heads. The preheating device is processed independent of the welding tools on the guiding ring. Further tools are processed independent of each other on the guiding ring during the welding process, and are additional welding heads, a weld tracking system, a mechanical processing system of the welding seam and/or a system for destruction-free weld seam test. The tool is processed on the guiding rings arranged at one tube end or both tube ends. The metal protective gas welding process is used as light arc welding process and is carried out by impulse light arc technology. An independent claim is included for a device for connecting the ends of the steel tubes.