Double arc four wire automatic arc-submerging welder and manufacture method thereof

Abstract

The invention discloses a double-arc four-wire automatic submerged arc welding machine and the manufacturing method thereof. The automatic submerged arc welding machine include a welding power supply, an upright post which is arranged on a trolley and a running gear and is provided with a top part with a lifting mechanism, a cross arm which is movably connected with the lifting mechanism and can move up and down along the upright post, a welding head which is equipped with a welding gun and a solder hopper, a wire guide arranged between the welding gun and a welding wire spool, a wire feeding device, a swing mechanism which is arranged on the trolley and is used for control the upright post to rotate relatively to the trolley, and an electric control cabinet which is fixed on the upright post. Compared with the prior art, the double-arc four-wire automatic submerged arc welding machine of the invention has the advantages as follows: the structure is novel, the arrangement is reasonable; the process engineering parameters such as power efficiency and so on are improved for satisfying technological requirements of welding a gas steam turbine; the welding efficiency can be increases by at least three times; a machine head, an operator seat lifting arm, a corner, a falling protector and other devices are arranged; the solder can be automatically reclaimed and fed, and applied continuously, thereby reducing labor intensity, improving operational environment and conducing to operation.

Description

technical field [0001] The invention relates to an automatic submerged arc welding process equipment, in particular to a double-arc four-wire automatic submerged arc welding machine and a manufacturing method thereof. Background technique [0002] There is a large amount of automatic submerged arc welding welding workload in the process of manufacturing gas turbines, especially the welding of #2 cylinder (connecting cylinder) and #3 cylinder (turbine cylinder). At present, these welding tasks can only be carried out by automatic submerged arc welding machines with only a single thick wire. Due to the use of a single welding wire, and the welding work of the vertical frame of the welding machine and the beam, and the limited operating range, etc., it resulted in: [0003] 1. The welding efficiency is low, and the welding wire of φ4mm can only weld 6.5-7kg per hour (25kg of coil wire). [0004] 2. The deformation of the workpiece is large, resulting in no machining allowance...

AI Technical Summary

Problems solved by technology

[0003] 1. The welding efficiency is low, the welding wire of φ4mm can only weld 6.5-7kg per hour (25kg of coil wire)

[0004] 2. The deformation of the workpiece is large, resulting in no machining allowance in the part of the workpiece, requiring repair welding, etc., which affects the quality and appearance of the workpiece

In addition, due to the characteristics of the molten pool and depth of the thick wire, the layers are repeatedly melted and crystallized, and the quality of the weld is relatively poor.

[0005] 3. High labor intensity, frequent replacement of welding wire, need to manually add flux, recycle flux, etc.

[0006] 4. The operating space of the welding machine is limited, which cannot meet the welding range of large workpieces. When welding, the welding machine needs to increase the operating height, shift, and build an operating platform, etc., which increases a lot of auxiliary workload and has unsafe factors.

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