KR20010056460A - Welding apparatus for welding in the narrow gap - Google Patents

Abstract

PURPOSE: A welding device for an extremely small opening is provided to conveniently perform welding an extremely small opening portion having a size under 5mm, such as a complex thermal power turbine diaphragm welding portion. CONSTITUTION: A welding torch (21) of a welding head contains a space unit while forming a thin box body having a specific length to vertical direction. An electrode (21a), a gas supply line (40), and a cooling water pipe line (61) are arranged in the space unit. Herein, the welding torch is formed in the box body for being inputted to an extremely small opening while arranging the gas supply line and the cooling water pipe line. Moreover, the electrode, the gas supply line, and the cooling water pipe line are arranged in one direction to reduce thickness of the welding torch.

Description

Welding apparatus for welding in the narrow gap

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding device for welding a hybrid thermal turbine diaphragm, and the like, and to a welding device for extremely narrow improvement that can smoothly weld a micro-improved weld of 5 mm or less, which is not applicable to a conventional welding device.

Conventional welding apparatus is a manipureator which is installed in the vertical support to enable the shanghaidong and left and right rotation of the boom, and the welding torch installed at one end of the boom stand of the menipulator and mounted on the lower part in close contact with the welding material A welding head capable of providing a welding head, a positioner installed at a lower bottom of the welding head and supporting a welding material mounted thereon, and connected to the manipulator and the welding head to supply gas, power, and cooling water, respectively. It consists of a gas supply source, a power supply source, a cooling water supply source 60, etc.

Such a conventional welding apparatus is formed by a nozzle of a cylindrical tube having a welding torch attached to a welding head having a predetermined length and diameter, a tungsten electrode rod inserted therein, and a gas passage through which gas flows. Such a conventional welding torch is made of a cylindrical tube nozzle having a predetermined diameter to install an electrode bar therein to ensure a space for maintaining the gas passage. Therefore, the conventional cylindrical torch welding torch is difficult to the minimum diameter of 9mm or less.

By the way, if the welding portion to be welded is flat or the space is large, there is no problem in welding, but welding in the narrow space of the weld portion is less than 9mm it is impossible to weld with a conventional welder.

For example, the combined thermal turbine diaphragm welding part is a very narrow improvement of 5 mm or less, so that the welding part is extremely narrow and a conventional welding torch of 9 mm or more cannot be entered, so welding is impossible without using other methods. Therefore, in order to weld the combined cycle turbine diaphragm welding part, it is possible to use the MIG Narrow Gap welding method which is enlarged by 9mm or more and the Submerged Arc Welding (SAW) which is enlarged by 20mm or more. There is a problem in that the degree of the product is poor and the subsequent process occurs a lot of work time.

SUMMARY OF THE INVENTION An object of the present invention is to provide a welding device for micro-improving which can smoothly perform welding of a micro-improved portion of 5 mm or less, such as a combined cycle turbine diaphragm welding unit.

1 is a schematic view showing the overall configuration of a welding apparatus according to the present invention

Figure 2 is an enlarged perspective view of the main portion of the welding apparatus according to the present invention

Figure 3 is an enlarged cross-sectional view of the main portion of the welding apparatus according to the present invention

Figure 4 is an exemplary view showing a state of welding a very narrow narrow line with the welding device according to the invention

<Explanation of symbols for the main parts of the drawings>

10: Meni puree 11: vertical support

12: boom 20: welding head

21: welding torch 21a: electrode

22: wire feeding means 22a: hot wire

30: positioner 40: gas supply line

50: power supply 51: power cable

60: cooling water supply source 61: cooling water piping line

70: weld 71: improved

Hereinafter, the technical configuration of the present invention in detail.

As shown in FIG. 1, the welding device for the ultra narrow narrowing of the present invention includes a menipulator 10 installed on the vertical support 11 such that the boom 12 can be moved vertically and horizontally, and the menipulator. A positioner for supporting a welder installed at one end of the boom 12 and having a welding torch 21 mounted at a lower end thereof, and a welder installed at a lower bottom of the welding head 20 and mounted thereon. 30, the power supply source 50 and the cooling water supply source 60 respectively connected to the menipulator 10 and the welding head 20 to supply power and cooling water, and the like. It's no different.

However, in the present invention, as shown in FIGS. 2 and 3, the structure of the welding torch 21 of the welding head 20 forms a thin rectangular box body having a space therein and having a length up and down. The electrode bar 21a, the gas supply line 40, and the cooling water pipe line 61 are installed side by side through the inner space of the rectangular box body.

Here, the welding torch 21 is formed of a thin rectangular box body, unlike the conventional one formed by a cylindrical tube nozzle having a predetermined diameter because the welding torch 21 is allowed to enter within a very narrow line. This is because the gas supply line 40 and the cooling water pipe line 61 can be installed at the same time.

That is, when the welding torch is made in the form of a cylindrical tube as in the prior art, since the gas supply passage is formed on the outer circumferential surface of the electrode, its diameter is inevitably large. However, the welding torch 21 of the present invention can be relatively thin because the electrode 21a, the gas supply line 40 and the cooling water piping line 61 are arranged in a line as shown in FIG. .

In FIG. 4, the example which welds the combined cycle turbine diaphragm minimum narrow line 71 with this welding apparatus is shown. As shown in the figure, since the welding torch 21 of the thin rectangular plate body can enter the narrow line 71, the welding of the very narrow narrow line welding part is possible.

On the other hand, the welding torch 21 of the present invention, as shown in Figure 3, the wire supply means 22 for supplying the wire as filler metal is provided separately, the electrode rod 21a can be welded by a TIG welding method consisting of a tungsten electrode rod. . It is preferable to use a hot wire 22a as the wire used here. This can bring about 3 times or more improvement in workability compared to the conventional Cold Wire by using the hot wire 22a. On the other hand, it is possible to obtain a shielding effect and a cooling effect at the same time by injecting purge gas through the wire supply line.

In addition, as another embodiment of the welding torch 21 of the present invention, it is understood that the welding material wire may be welded by a MIG welding method comprising an electrode wire made of an electrode rod.

In addition, the present invention is equipped with an ALC (arc length control) function that can automatically adjust the arc length, the oscillation function to widen the welding bead, the monitoring function to observe the weld shape, can be easily welded to the inclined weld It also has a turning function to rotate the welding head.

The ultra narrow narrow welding device of the present invention is different from the conventional welding torch 21 is formed by a cylindrical tube nozzle having a predetermined diameter, the electrode rod 21a, gas supply line 40 in a thin rectangular box body. ) And the cooling water piping line 61 are arranged in a line in the box body, so that the turbine diaphragm main welding part or the like can be easily welded even in a very narrow part of 5 mm or less.

Claims (4)

Menipurator 10 is installed on the vertical support (11) so as to be able to move the left and right and the left and right rotation of the boom 12, and the end of the boom 12 of the manipurator is installed at the end of the welding torch 21 A welding head 20 equipped with a positioner, a positioner 30 for supporting a weldment 70 installed on a lower bottom of the welding head 20 and being mounted on the upper portion thereof, the manipulator 10 and welding In each of the head 20 is connected to the power supply source 50, the cooling water supply source 60 for supplying power and cooling water, etc., The welding torch 21 of the welding head 20 forms a thin box body having a space portion therein and having a length up and down, and the electrode rod 21a, the gas supply line 40, and the space inside the box body. Cooling water pipe line 61 is a very narrow improvement welding device, characterized in that installed side by side in a line. According to claim 1, The welding torch 21 is a wire feeding means 22 for supplying a wire which is a filler material is installed separately, the electrode 21a is characterized in that the welding by TIG welding method consisting of a tungsten electrode rod. Ultra narrow narrowing welding device. The welding device for micro narrow improvement according to claim 2, wherein the wire uses a hot wire (22a). The welding device for micro-improved welding according to claim 1, wherein the welding torch (21) enables welding of the filler metal by the MIG welding method comprising an electrode wire made integral with the electrode bar (21a).