Device for joining ends of pipes made of steel by means of orbital welding

Abstract

The invention relates to a method for connecting aligned pipes, in particular made of steel, by means of orbital welding, using a weld joint formed by pipe ends and a tool that can be moved orbitally around the weld joint for welding and testing the weld seam. And a device for temporary spot welding of the ends of the pipes. In this case, the device consists of guide base plates that can be placed on the tube end on both sides in the region of the welding point and can be fixedly clamped, wherein the guide base plate has a center in the center. Circular recess with radial openings for passing through and for receiving centrally in the recess the pipe to be welded, with a fixed coupling at the side of the guide base plate facing away from the corresponding welding port Clamping element for clamping the guide base plate to the tube end, and a frame with a rotationally mounted arrangement between the guide base plates at the inner side facing the weld joint and pivotable centrally around the tube end through at least 360° To accommodate welding and inspection tools.

Description

technical field [0001] The invention relates to a device for joining ends of steel pipes by means of orbital welding according to the preamble of claim 1 . [0002] The invention relates in particular to pipes which can have, for example, a wall thickness of 2 to 20 mm and a diameter of 60 to 1600 mm and which are connected to one another by means of different welding methods, such as laser beam welding, laser-arc welding with hybrid technology or arc welding. Welding of road pipes. The lower tube is understood not only as an annular tube but also as a hollow profile with different cross-sections. Background technique [0003] Welding pipes using orbital technology is generally known, for example, from DE 103 34 446 A1. Herein, an orbital welding device for joining two pipe ends is disclosed, wherein the orbital welding device is placed on and clamped to a first pipe end and the second pipe end is brought to the second pipe end. In the welding position before the end of a...

AI Technical Summary

Problems solved by technology

As a result, the device becomes very heavy and can be used flexibly in place only with high outlay

[0006] Furthermore, the procedure of the welding process is complex, in which the pipe ends have to be pushed into the device and centered and then the welded pipe has to be drawn out of the device according to its length

[0007] In summary, it has been established that, according to the prior art, there is currently no industrially applicable rail guidance system that is optimally compatible with the requirements in terms of quality and economy of orbital welding

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