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Single-side MIG and TIG synchronous automatic soldering method and device

A synchronous automatic, welding device technology, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve the problems of lack of synchronous remelting, low deposition speed, poor arc stability, etc., to eliminate the phenomenon of arc instability, The effect of improving weld formation and reducing welding deformation

Active Publication Date: 2007-11-28
XIAN XD SWITCHGEAR ELECTIC CO LTD
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AI Technical Summary

Problems solved by technology

[0010] 1), shallow penetration, low deposition speed, low production efficiency
[0011] 2) The ability of the tungsten electrode to carry current is poor. Excessive current will cause the tungsten electrode to melt and evaporate, and its particles may enter the molten pool to cause tungsten inclusion in the weld seam.
[0020] 1) Poor arc stability
[0021] 2) Poor weld formation
The inventor found in practice that the two welding techniques of the same molten pool act on the same molten pool at the same time, and the effect of remelting cannot be achieved. TIG welding does not produce spatter because the filler wire does not pass through the arc, and the weld shape is beautiful. , MIG welding has poor weld seam formation. When two welding techniques act on the same molten pool at the same time, MIG welding affects the arc stability of TIG welding, or TIG arc improves the stability of MIG arc, and does not have synchronous remelting Therefore, this is not ideal in the field of welding that requires both the internal quality of the weld and the appearance

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  • Single-side MIG and TIG synchronous automatic soldering method and device
  • Single-side MIG and TIG synchronous automatic soldering method and device
  • Single-side MIG and TIG synchronous automatic soldering method and device

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[0053] It should be noted that Fig. 5 and Fig. 6 show the schematic diagrams of the welding of the VG3 shell of the Three Gorges Project, that is, the automatic welding of the rust-proof aluminum spiral welded pipe and the aluminum alloy cast flange ring seam. The shell is required to be welded according to ABB company's drawings, and the weld seam requires X-ray flaw detection level II or above. It turned out that ABB company used plasma MIG welding. This process requires huge investment in equipment, and the welding seam is not beautiful in appearance and high in efficiency.

[0054] If the welding process method of remelting after MIG welding alone is adopted, the efficiency is low, the weld seam is poorly formed, and the welding deformation is large (it cannot meet the requirements of the drawing for circular runout).

[0055] Using the welding process of the present invention, under the condition of fully meeting the requirements of the drawings, the equipment investment ...

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Abstract

The present invention relates to automatic welding technology, and is especially automatic synchronous single side MIG and TIG welding method and apparatus. The present invention features that on the single welded surface, the front MIG welding gun and the rear TIG welding gun form two molten bath simultaneously, and after some time T, the TIG welding gun forms one TIG molten bath in the position with MIG molten bath. The present invention is suitable for automatic single side welding of homogeneous or hetreogeneous Al, Al alloy material as well as other metal material.

Description

technical field [0001] The invention belongs to automatic welding technology, in particular to a single-sided MIG and TIG synchronous automatic welding method and device. technical background [0002] TIG welding is a welding method that uses the arc heat generated between the tungsten electrode and the workpiece to melt the base metal and filler wire under the protection of inert gas (argon, helium or their mixed gas). During welding, the inert gas is continuously ejected from the nozzle of the welding torch, forming a gas shield around the arc to isolate the air, so as to prevent harmful effects on the tungsten electrode, molten pool and adjacent heat-affected zone, so as to obtain high-quality welds. [0003] TIG welding has the following advantages: [0004] 1) When welding, non-melting tungsten electrodes are used, and there is no influence of electrode melting on the arc length, so the arc is more stable than MIG welding and the arc length is easy to control. When fi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/00B23K9/16B23K9/133B23K28/02
Inventor 李建生刘锋王金民任烨朱玲余彦
Owner XIAN XD SWITCHGEAR ELECTIC CO LTD
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