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TIG arc welding electrode and TIG arc welding method

An arc welding and electrode technology, applied in arc welding equipment, welding medium, welding equipment, etc., can solve the problems of high current density, reduce arc pressure, small expansion, etc., achieve high speed and efficiency, and reduce arc pressure. Effect

Inactive Publication Date: 2015-06-10
MITSUBISHI HITACHIPOWER SYST LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the case of such a gap in the sharp processed portion of the electrode tip (Patent Document 5) and a gap in the electrode tip (Patent Document 6), the spread of the arc near the tip of the tungsten electrode is small and the current density is kept high. Therefore, it is impossible to reduce the difference between the current density near the tip of the tungsten electrode and the current density of the flaring arc near the base material, and it is impossible to reduce the difference between the tip of the tungsten electrode and the base material. 3, the effect of reducing the arc pressure cannot be obtained

Method used

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  • TIG arc welding electrode and TIG arc welding method

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Embodiment 2

[0072] The shape of the slit-containing tungsten electrode 1 according to the second embodiment of the present invention is shown in figure 2 , figure 2 (a) is the front view, figure 2 (b) is a side view, figure 2 (c) is a bottom view.

[0073] It is also possible to set a plurality of slits 2 at the tip of the electrode 1 to form the number of the tip to more than 3 ( figure 2 indicates a cruciform type of slit).

[0074] In the case where the above-mentioned slit is a straight line, welding without direction can be sufficiently performed, but especially when the diameter of the tungsten electrode is larger than 5.0mm, the case of the cross can be compared with the case of the straight line. For a more non-directional weld.

[0075] Furthermore, it is also possible to change the conical shape of the tip of the tungsten electrode 1 in the above-mentioned embodiment 1 and embodiment 2 into a polygonal pyramid shape not shown in the figure, and obtain the same shape as...

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Abstract

The tip of a tungsten electrode (1) is polished to a cone shape or a polygonal pyramid shape, and a certain slit being along the central axis of the tip portion and having a width of 0.75 mm to 1.5 mm is provided from the tip to base end side of the electrode (1) along the axis direction, obtaining the TIG arc welding electrode (1) in which at least two or more tips are formed on mutually opposite sides of the slit, near the center of the electrode (1). The TIG welding tungsten electrode (1) can be obtained with which in a large current region, welding is possible without occurrence of an irregular bead and even in a small current region, the arc concentration can be kept and it can be avoided that the arc unevenly occurs, so beads meander and the width of a bead becomes thin, resulting in a protruding bead.

Description

technical field [0001] The invention relates to an electrode for TIG arc welding and a TIG arc welding method, and relates to a TIG arc welding method in which the shape of a tungsten electrode is improved to improve the shape of a weld bead and the shape of penetration depth. Background technique [0002] Figure 10 A conceptual diagram showing TIG welding (Tungsten Inert Gas Arc Welding). TIG welding uses a tungsten electrode 1 as a non-consumable electrode when welding an object 3 to be welded such as an iron plate (hereinafter sometimes referred to as a base material 3 ), and in an atmosphere of an inert gas such as argon, the tungsten electrode 1 to The above-mentioned base metal 3 as the welding object generates an arc 4 to form a welding method of a molten pool 5. The melting of the base material 3 and the solidification of the weld metal are carried out in an inert gas atmosphere rather than in an oxidizing atmosphere. Make high-quality welds. In addition, although...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/04B23K9/167B23K35/02B23K35/32
CPCB23K9/167B23K35/0261B23K35/32B23K35/02
Inventor 渡边浩
Owner MITSUBISHI HITACHIPOWER SYST LTD
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