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TIG (tungsten inert gas welding) power assistant double TIG (tungsten inert gas welding) compound heat source welding equipment and method

A welding equipment and composite heat source technology, applied in welding equipment, arc welding equipment, metal processing equipment, etc., can solve the problems of unsatisfactory thermal conductivity hot wire, damage to the welding wire feeding process, and limit the application of welding materials. Promote, improve welding quality, improve the effect of cladding efficiency

Inactive Publication Date: 2012-07-11
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the use of TIG arc heating, its energy density is very high. For materials with low thermal conductivity, it is easy to melt before the welding wire is fed, which will destroy the normal welding wire feeding process.
[0006] The above two methods are not ideal for hot wires with high resistivity and low thermal conductivity, such as pure iron, which greatly limits the application of welding materials in high-efficiency TIG welding. How to expand the selection range of welding wire and Realizing the combination of high-quality and high-efficiency welding has become the key to expanding the application of TIG welding in industrial production, especially in some special fields, such as high-quality and high-efficiency surfacing welding of pure iron elastic belts

Method used

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  • TIG (tungsten inert gas welding) power assistant double TIG (tungsten inert gas welding) compound heat source welding equipment and method
  • TIG (tungsten inert gas welding) power assistant double TIG (tungsten inert gas welding) compound heat source welding equipment and method
  • TIG (tungsten inert gas welding) power assistant double TIG (tungsten inert gas welding) compound heat source welding equipment and method

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Effect test

Embodiment 1

[0017] Example 1: Combining figure 1 , the present invention is a TIG power supply-assisted dual-TIG composite heat source welding equipment, which is composed of a main TIG power supply, a TIG main welding torch, a wire guide, a secondary TIG power supply, a wire feeding device and a workpiece, and is characterized in that: the main TIG power supply Connect the TIG main welding torch and the workpiece respectively, the main TIG power supply, TIG main welding torch, main welding arc and workpiece constitute the main welding circuit; the auxiliary TIG power supply connects the guide wire nozzle and the workpiece respectively, and the inside of the guide wire nozzle penetrates the wire sent by the wire feeding device. Welding wire, wire guide nozzle, auxiliary TIG power supply, workpiece and welding pool constitute a hot wire circuit, and the wire feeding device is insulated from the workpiece.

[0018] The welding method realized by the dual TIG compound heat source welding equ...

Embodiment 2

[0019] Example 2: Combining Figure 1-Figure 5 , the present invention is based on the low welding efficiency of traditional argon tungsten arc welding, the limited ability of the tungsten electrode to carry current, which limits its application in the field of thick plates and surfacing welding, and proposes a hot wire under the action of dual TIG composite power supply Welding Technology. Use the resistance heat or arc heat generated by the auxiliary TIG power supply to heat the welding wire to improve the welding heat input as a whole to make up for the limitation of heat input caused by the limited tungsten load capacity of argon tungsten arc welding; at the same time, the dual TIG composite power supply is adopted, The power capacity requirement on the TIG power supply is eased, the service life of the tungsten electrode is improved, and the production efficiency is improved. Since the heat of the composite heat source is concentrated to the end of the welding wire, the ...

Embodiment 3

[0022] Example 3: Binding Figure 1-Figure 5 , the present invention introduces a secondary TIG power supply in the tungsten argon arc welding system. First, the wire feeding device and the welding wire are insulated from the workpiece, and the two electrodes of the secondary TIG power supply are respectively connected to the wire feeding nozzle and the workpiece to form a conductive circuit, such as figure 1 shown. At the beginning of the welding process, connect the main welding circuit, ignite the main arc to preheat the workpiece for 1-2 seconds, then feed the welding wire through the wire feeding device, and connect the hot wire circuit when the end of the welding wire is 5-8mm away from the workpiece. Under the action of the arc plasma generated by the arc, the auxiliary arc is easily ignited between the end of the welding wire and the workpiece. Under the action of the heat generated by the arc, the end of the welding wire melts and forms a droplet. The heating effect ...

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Abstract

The invention provides a TIG (tungsten inert gas welding) power assistant double TIG (tungsten inert gas welding) compound heat source welding equipment and method, which heats up a welding wire through resistance heat or electric arc heat production at different-droplet transferring patterns to improve the welding wire cladding efficiency. The TIG power assistant double TIG compound heat source welding equipment consists of a main TIG power, a TIG main welding torch, a conducting wire nozzle, an assistant TIG power, a wire feed device and a work piece, wherein the main TIG power is connectedwith the TIG main welding torch and the work piece respectively, the main TIG power, the TIG main welding torch, a main welding arc and the work piece constitute a main welding loop; the welding method is that leading the assistant TIG power in a routine argon tungsten-arc welding system, connecting two electrodes of the assistant TIG power on the wire feed device and the work piece to form an electric conduction loop, and changing the size of the assistant TIG power electric current in the welding process to form the different-droplet transferring patterns. The invention has simple equipment, low cost, and is convenient to promote in the industrial production.

Description

(1) Technical field [0001] The invention relates to welding technology, in particular to a TIG power source-assisted double-TIG composite heat source welding equipment and method. (2) Background technology [0002] Due to the reliable protection of the shielding gas on the arc and the molten pool, the argon tungsten arc welding completely eliminates the damage of oxygen, nitrogen, hydrogen and other impurity gases to the welding metal. The welding arc is extremely stable, which can achieve high-quality welding and obtain excellent welds. However, due to the limitation of the current carrying capacity of the tungsten electrode, the arc power is restricted, resulting in low welding speed and low production efficiency. [0003] The hot wire TIG welding method is to preheat the welding wire on the basis of ordinary TIG welding, so as to increase the welding heat input, increase the melting speed, and thus increase the welding speed. The principle is to heat the welding wire to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/167B23K9/10B23K9/06
Inventor 吕世雄黄永宪敬小军曲杰磨安详于冲冲郑传奇徐永强张芙蓉
Owner HARBIN INST OF TECH
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