Double heat source hybrid welding torch and welding method

A hybrid welding and hybrid welding technology, which is applied to the welding torch of ion arc (PAW) and melting electrode arc MIG dual heat source hybrid welding. Efficiency, difficulty in stabilizing melting electrodes and non-melting electrodes, and difficulty in stabilizing double arcs in the common molten pool, to achieve the effect of improving deposition efficiency, maintaining stability, and reducing heat input

Pending Publication Date: 2017-05-10
王长春
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the positions of the two electrode nozzles on the same welding torch are fixed, and this position interacts with the magnetic shield, it is difficult for this technology to work stably in a wide range of operating current parameters. In fact, adjusting the magnetic shield alone is not easy to stabilize the double arc in the communal molten pool, so it is difficult to popularize and apply it in the production line
[0010] As mentioned above, there is no doubt that compared with TIG arc, plasma arc is compressed, has higher energy density and welding penetration, and the use of plasma arc in hybrid welding process can increase welding penetration, which is very important for improving composite welding. Welding quality is very important; at the same time, the stability of plasma arc PAW and MIG arc in the communal molten pool is an important condition for achieving high-efficiency hybrid welding quality and efficiency, but the existing various plasma arc PAW and MIG arc hybrid welding It is difficult for the device to form or stabilize the common molten pool of the melting electrode and the non-melting electrode, so not only can not fundamentally improve the welding penetration and welding efficiency, but also it is difficult to achieve good welding quality, which limits the popularization and application of these technologies

Method used

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Effect test

Embodiment 1

[0038] figure 1 It is a structural schematic diagram of a dual heat source composite welding torch, which is a plasma arc and melting electrode MIG arc composite welding torch, which combines PAW and MIG welding in the same overall welding torch, and During the welding process, the stability of the plasma arc and the MIG arc in the communal molten pool is improved by controlling the distance D between the arc impact points on the workpiece surface, thereby improving the welding coupling efficiency of the dual heat sources. The composite welding torch includes:

[0039] ---A non-melting electrode arranged at the front end of the welding torch body 100 according to the welding direction. The non-melting electrode is a plasma electrode. Shielding sleeve 115 and compression nozzle 116; the center of compression nozzle 116 is fixed with tungsten pole 111 through tungsten pole clamp 112, cooling water channel 112 is wrapped on the outside of tungsten pole clamp 112, protective gas ...

Embodiment 2

[0050] figure 2 A structural schematic diagram of a hybrid welding system is given, which includes a composite welding torch 3 described in Example 1, a plasma power source 1, a melting electrode MIG power source 2, a wire feeding mechanism 4, a robot 5 and a controller 6, and the plasma The power supply 1 and the melting electrode MIG power supply 2 together form a double welding heat source. The composite welding torch 3 is installed on the robot 5. 3 is connected with the plasma power source 1, the melting pole MIG power source 2 and the wire feeding mechanism 4, the composite welding torch 3 is equipped with water cooling, and the water cooling tube of the composite welding torch 3 is connected with the power supply water cooling system.

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Abstract

The invention provides a double heat source hybrid welding torch and a welding method. The double heat source hybrid welding torch comprises a consumable electrode and a non-consumable electrode, an acute angle is formed between respective axes of the electrodes, the acute angle is less than 60 degrees, an electric arc is built between the non-consumable electrode and a workpiece and between the consumable electrode and the workpiece, a common melting pool is formed, the distance between electric arc impact points of the two electric arcs on the plane of the workpiece is D, and stable state of the electric arcs is realized by virtue of an adjusting device used for adjusting the distance between the two electrodes and a magnetic shielding part used for applying a transverse magnetic field between the two electrodes. According to the double heat source hybrid welding torch, the influence of an electromagnetic force on the electric arcs can be reduced by virtue of the adjusting device according to parameter conditions of welding operation regardless of the direction and magnitude of an arc current, and the influence of an MIG (Metal-Inert Gas) electric arc on a plasma electric arc is practically reduced, wherein operation for adjusting the distance between the two electrodes by virtue of the adjusting device is more convenient, and effect is more direct.

Description

technical field [0001] The present invention relates to a welding device, in particular to a welding torch for composite welding of plasma arc (PAW) and melting electrode arc MIG (GMAW) dual heat sources, and a welding method using the composite welding torch. Background technique [0002] Welding techniques have been known for many years and are widely used in industrial applications. The MIG process of gas metal arc welding (GMAW) has a continuous, self-feeding melting electrode shielded from the ambient atmosphere by an external gas supply. Metal transitions from the molten electrode to the workpiece through the following three basic modes: (a) short-circuit transition, (b) particle transition, and (c) jet transition. Among them, the best working mode is the injection transition mode. The so-called MIG welding spray mode means that the metal enters the molten pool of the workpiece to be welded in a highly directional droplet flow from the melting electrode electrode. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K28/02
CPCB23K28/02
Inventor 王长春陈卓勤
Owner 王长春
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