Double-sided double-arc welding system and method for fine-diameter pipes based on k-tig

A double-sided double-arc welding system technology, applied in welding equipment, arc welding equipment, tubular objects, etc., can solve problems such as deterioration of stability, reduction of perforation current, reduction of workpiece deformation, etc., to reduce welding heat input, reduce Effect of welding current, reducing welding stress and deformation

Inactive Publication Date: 2021-02-26
TIANJIN UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] The present invention aims to solve the technical problem that the stability of small holes in K-TIG welding deteriorates as the thermal conductivity of the workpiece increases, and provides a K-TIG-based double-sided double-arc welding system and method for fine-diameter pipes. Combining the original K-TIG process with the double-sided double-arc piercing welding process, the piercing current is greatly reduced, and the deformation of the workpiece is reduced through the double-sided arc welding process; it has low equipment operating costs, easy to achieve process conditions, Advantages such as short welding preparation time

Method used

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  • Double-sided double-arc welding system and method for fine-diameter pipes based on k-tig
  • Double-sided double-arc welding system and method for fine-diameter pipes based on k-tig

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Embodiment Construction

[0018] In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:

[0019] Such as figure 1 and figure 2 As shown, an embodiment of the present invention discloses a K-TIG-based double-sided double-arc welding system for fine-diameter pipes, which mainly includes a welding machine power supply 1, a K-TIG welding torch 2, an insulating rod 4, and a tungsten electrode ring 5 , which is suitable for welded pipes 3 with fine diameters, and the nominal diameter of such welded pipes 3 generally does not exceed 200mm.

[0020] The negative pole of the welding machine power supply 1 is connected with the K-TIG welding torch 2 , and the positive pole of the welding machine power supply 1 is connected with the tungsten pole ring 5 . The tungsten pole ring 5 is fixed on the insulating rod 4, and the insulating rod 4 ...

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Abstract

The invention belongs to the field of welding technology, and discloses a K-TIG-based double-sided double-arc welding system and method for fine-diameter pipes. The insulating rod is installed inside the pipe to be welded, so that the tungsten electrode ring and the K-TIG welding torch are separately arranged on both sides of the butt joint of the pipe to be welded; when welding, the tungsten electrode ring is first in contact with the pipe to be welded, and the welding power source outputs the welding current to start the arc ; Then separate the tungsten electrode ring from the inner wall of the pipe to be welded, and ignite the arc; move the K-TIG welding torch in a circular motion along the butt joint of the pipe to be welded, and increase the welding current at the same time, and complete the welding after a circle. The invention combines the original K-TIG process with the double-sided double-arc perforation welding process, greatly reduces the perforation current, and reduces the deformation of the workpiece through the double-sided arc welding process; it has the advantages of low equipment operation cost and easy process conditions Realization, welding preparation time is short and so on.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a K-TIG-based welding system and welding method. Background technique [0002] Pipeline transportation, as one of the five major transportation industries of railways, highways, sea transportation, civil aviation and long-distance pipelines, plays an important role in the construction of the national economy. The development of cities and industries requires the laying of a large number of pipes. At present, the pipeline network must be formed by welding, so it is particularly critical to ensure the welding quality of pipe joints. At present, due to the flexibility of manual welding and the low requirements for equipment, the welding of outdoor pipelines is still dominated by manual welding, which is characterized by high efficiency and high adaptability to the environment. [0003] K-TIG (keyhole high-efficiency penetration argon arc welding torch) is a new perforation weldin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/167B23K9/028B23K101/06
CPCB23K9/0286B23K9/167
Inventor 刘祖明胡承冲聂翔
Owner TIANJIN UNIV
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