KR101253892B1 - Tandem Electro Gas Arc Welding Device - Google Patents

Tandem Electro Gas Arc Welding Device Download PDF

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KR101253892B1
KR101253892B1 KR1020100136109A KR20100136109A KR101253892B1 KR 101253892 B1 KR101253892 B1 KR 101253892B1 KR 1020100136109 A KR1020100136109 A KR 1020100136109A KR 20100136109 A KR20100136109 A KR 20100136109A KR 101253892 B1 KR101253892 B1 KR 101253892B1
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South Korea
Prior art keywords
torch
electrode
root
face
electrode wire
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KR1020100136109A
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Korean (ko)
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KR20120074147A (en
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안영호
박형진
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주식회사 포스코
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Abstract

An object of the present invention is to provide a tandem electro gas arc welding device that provides a smooth supply of welding material in the space between the ultra-thick materials, and to achieve this, a torch for a root and face electrode wire having an electrode wire mounted at a tip thereof. And a torch for a face and a face non-electrode wire to which a non-electrode wire is mounted at a tip thereof, and the non-electrode wires are melted by arc heat generated by supplying electricity to the electrode wire of the torch for the electrode wire. A torch for face electrode wires provides a gas arc welding device disposed between the root and face non-electrode wires.

Description

Tandem Electro Gas Arc Welding Device

The present invention relates to a tandem electro gas arc welding apparatus in which a non-electrode wire is melted in an arc heat generated by an electrode wire, and more particularly, to a tandem electro gas arc welding apparatus providing a sufficient amount of melting even in a narrow welding seam. .

The tandem electro gas arc welding method is a welding method that has been developed and applied to increase welding productivity of ultra thick steel having a plate thickness of 50 mm or more, which is required in shipbuilding. In particular, when welding 80mm thick steel by the usual welding method, 80-90 passes of multi-layer welding should be performed for flux cored arc welding, and 2 passes should be welded even for single electro gas arc welding. In shipyards requiring welding productivity, it is preferable to apply tandem electrogas welding capable of welding ultra-thick steel in one pass.

However, in order to weld the extreme post material with a plate thickness of 80 mm in one pass, it is necessary to perform heat welding at a temperature of 500 kJ / cm or more, and if the heat of welding increases, coarse texture is obtained at the welded portion, do. Therefore, in order to secure the impact toughness of the welded portion in such large heat welding, a large amount of heat-resistant steel material and a large amount of heat-welding material have been developed and applied.

Thus, in order to lower the heat input of tandem electro gas arc welding, a tandem electro gas arc welding device for supplying the non-electrode wires W2 and W4 to the electrode wires W1 and W3 has been proposed.

Figure 1a shows such a tandem electro gas arc welding device. Tandem electro gas arc welding mainly uses carbon dioxide (60) as a protective gas, and generates an arc with two electrode wires (W1, W3), and this arc heat causes electrode wires (W1, W3), non-electrode wires (W2, W4) and the welded material 30 is melted so that the welding is made. An arc generated between the electrode wires W1 and W3 and the welded material 30 provided with the water-cooled copper immersion 40 on the front surface of the welded material 30 and the fixed backing material 50 on the back surface. The non-electrode wires W2 and W4 are melted together to form a molten metal 32, and when a predetermined amount of molten metal is formed, a traveling device equipped with the torch 10, 15, 20, or 25 for wire (not shown). It is a high efficiency welding method that automatically runs through the si).

A top view of this, tandem electro gas arc welding, is shown in FIG. 1B. Tandem electro-gas arc welding in the above manner is arranged to arrange the electrode wire torch (10, 20) and the non-electrode wire torch (15, 25) in a row to reciprocate between the backing material 50 and copper alloy 40 The space that can be reciprocated is limited by the thickness of the extreme material. In addition, since it is reciprocating between the ultra-thick materials, the space between the ultra-thick materials, that is, between the ultra-thick materials and the ultra-thick materials, is generally small between 8-12 mm on the root side and 35-45 mm on the face side. There is a constraint that an electrode and two non-electrode wires must be supplied.

In particular, in the case of the face side, sufficient melting should occur to both base materials. Since the torches 10, 15, 20, and 25 for the electrode and the non-electrode wire are arranged in a narrow space, sufficient welding material is supplied to both base materials. Difficulties arise.

In addition, when the distance between the torch of the electrode and the non-electrode wire is far apart, the electrode wires W1 and W3 and the non-electrode wires W2 and W4 do not coincide with the same RBI so that the melting of the non-electrode wires W2 and W4 is prevented. There is a problem that is not made.

The present invention is to solve the above problems of the prior art, it is an object of the present invention to provide a tandem electro gas arc welding device that provides a smooth supply of the welding material in the narrow space between the extreme materials.

In addition, an object of the present invention is to stably supply the electrode and the non-electrode wire, thereby reducing the heat input of the weld.

In order to solve the above problems, the present invention provides the following configuration.

The present invention includes a torch for a root and face electrode wire, to which the electrode wire is mounted at the tip, and a torch for a root and face non-electrode wire, to which the non-electrode wire is mounted at the tip, wherein the non-electrode wires are electrodes of the torch for the electrode wire. Melted by arc heat generated by supplying electricity to the wire, the torch for the root and face electrode wires provides a gas arc welding device disposed between the root and face non-electrode wires.

In this case, the torch for face non-electrode wire may be out of a plane formed by the torch for the root and the face electrode wire.

The root-side non-electrode wire torch has a larger angle with respect to the gravity direction than the root-side electrode wire torch, and the face-side non-electrode wire torch is smaller in the gravity direction than the face-side electrode wire torch. Can have an angle.

Specifically, the torch for the root and face electrode wire may form an angle of 10 to 25 ° with respect to the gravity direction, the torch for the root and face non-electrode wire may form an angle of 15 to 30 ° with respect to the gravity direction. have.

Meanwhile, the torch for face non-electrode wire may form an angle of 5 to 30 ° with respect to a plane formed by the root and the face electrode wire torch.

The torch for the root and face electrode wires and the torch for the root and face non-electrode wires are connected to the root and face electrode contact tip and the root and face non-electrode contact tip, respectively, The distance from the weldment may be located closer than the distance from the root and face electrode contact tip to the weldment.

The present invention, through the above configuration, by increasing the oscillation range of the electrode and the non-electrode in the narrow space between the extreme materials to facilitate the supply of the welding material.

In addition, the present invention can reduce the amount of heat input to the welding portion by stably supplying the electrode and the non-electrode wire in the welding of the very thick material.

FIG. 1A is a side schematic view of a tandem electro gas arc welding apparatus proposed before the present invention, and FIG. 1B is a plan view.
2 is a side view of the first embodiment of the present invention.
3 is a front view of the first embodiment of the present invention.
4 is a plan view of a first embodiment of the present invention.
5 is a side view of a second embodiment of the present invention.
6 is a front view of a second embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, it will be described a specific embodiment of the present invention.

In the present invention, the root electrode and the root non-electrode mean the electrode and the non-electrode of the backing material 150 side of the electrode and the non-electrode, respectively, and mean the electrode and the non-electrode between the narrow ends of the welded portion of the ultra-thick plate. , The face electrode and the face non-electrode mean an electrode and a non-electrode disposed on the side where the copper filler 140 is installed, respectively, and mean a wide side between the extreme plates of both ends of the welded portion of the ultra thick plate (FIGS. 1B and 2). Reference).

2-4 show side, front and top views of a first embodiment of the present invention. As shown in FIG. 2, the present invention mainly uses carbon dioxide 160 as a protective gas, as shown in FIG. 1A, and generates an arc with two electrodes, that is, the root electrode 110 and the face electrode 120. .

The electrode wires W1 and W3 supplied from the torch 110 for the root electrode wire and the torch 120 for the face electrode wire are melted by arc heat and supplied from the torch 115 and 125 for the root and face non-electrode wire. The non-electrode wires W2 and W4 are also melted by the arc generated in the root and face electrode wires W1 and W3.

The water-cooled copper immersion 140 is installed on the front surface of the to-be-welded material 130, and the fixed backing material 150 is installed on the back surface, and carbon dioxide 160 is supplied to the welding part side as a protective gas.

The torch for the root electrode wire and the torch for the root non-electrode wire (110, 115) and the torch for the face electrode wire and the torch for the face non-electrode wire (120, 125) are integrally oscillated in the weld, while the electrode wires (W1, W3) And the extreme thick plates on both sides with the melt of the non-electrode wires W2 and W4.

The root electrode side is composed of a torch 110 for root electrode wire supplying the electrode wire W1 and a root electrode contact tip 112 for guiding the root electrode wire to a welded material, and the root non-electrode 115 is a non-electrode. The torch 115 for the root non-electrode wire for supplying the wire W2 and the root electrode contact tip 117 for guiding the root non-electrode wire to the welded material are formed.

The torch 110 for the root electrode wire has a predetermined angle α 1 with respect to the direction of gravity in order to supply the wire melt to the narrow root side while avoiding interference with the root non-electrode wire torch 115. Have In addition, the root non-electrode wire torch 115 is an electrode supplied from the root electrode wire torch 110 while avoiding interference with the root electrode wire torch 110 disposed with the predetermined angle α 1 . In order to supply the non-electrode wire W2 to the arc formed at the end of the wire W1, it has a predetermined angle α 2 with respect to the direction of gravity.

Since the root electrode wire torch 110 and the root non-electrode wire torch 115 are oscillated toward the narrower root side, the root electrode wire torch 110 and the root non-electrode wire torch 117 are preferably arranged in a line. (α 2) preferably has a relatively large angle than the angle (α 1) for the root electrode wire torch 112 forms.

The angle α 1 formed by the root electrode wire torch 110 is preferably in a range of 10 to 25 °, and within this range, the torch 110 for the root electrode wire allows a straightness of the electrode wire W1 to be allowed. The molten metal is smoothly supplied to the root side without the torch 110 for the root electrode wire being melted by the arc.

The angle α 2 formed by the root non-electrode wire torch 115 is preferably between 15 and 30 °. Within this range, the root non-electrode wire torch 115 is connected to the root electrode wire torch 110. Interference does not occur, and does not affect the arrangement of the face electrode wire torch 120 and the face non-electrode wire torch 125 disposed later. If the angle α 2 formed by the root non-electrode wire torch 115 exceeds 30 °, the torch 120 for the face electrode wire and the torch 125 for the face non-electrode wire have a large inclination angle or a root vision. The distance from the torch 115 for the pole wire is inevitably farther apart, and is limited by the oscillation range as a whole.

Meanwhile, the torch 120 for the face electrode wire is disposed on a plane P formed by the torch 110 for the root electrode wire and the torch 115 for the root non-electrode wire. That is, the torch 110 for root electrode wire, the torch 115 for root non-electrode wire, and the torch 120 for face electrode wire are arrange | positioned at the same plane P. As shown in FIG.

The torch 125 for the face non-electrode wire is disposed closer to the root side than the torch 120 for the face electrode wire (see FIG. 2). That is, the face non-electrode wire torch 125 and the root non-electrode wire torch 115 are disposed between the face electrode wire torch 120 and the root electrode wire torch 110. The face non-electrode wire torch 125 is disposed closer to the root side than the face electrode wire torch 120, so that the face electrode wire torch 120 oscillates close to the face, whereby the extreme material 170 The molten metal is smoothly supplied to the face side with a large gap between them.

In addition, the face non-electrode wire torch 125 is disposed to be out of the plane P (see FIG. 3), and the non-electrode wire W4 of the face non-electrode wire torch 125 is a torch for face electrode wire ( The electrode wire W3 of 120 is directed toward the arc created (see FIGS. 3 and 4).

As shown in FIG. 2, the torch 120 for the face electrode wire is disposed with a predetermined angle α 3 with respect to the gravity direction.

The angle α 3 formed by the face electrode wire torch 120 is preferably 15 to 30 °. Within this range, the electrode wire W3 supplied from the face electrode wire torch 120 has a straightness. Torch 115 for the root non-electrode wire and interference with the non-electrode wire W4 supplied from the face non-electrode wire torch 125 without melting the face electrode contact tip 122 by the arc in an acceptable range. Interference with is avoided. In addition, the interval between the face electrode wire torch 120 and the root electrode wire torch 110 is reduced, thereby increasing the range of oscillation of the face electrode wire torch 120 and the root electrode wire torch 110.

The face non-electrode includes a torch 125 for a face non-electrode wire and a face non-electrode contact tip 127, and includes a torch 110 for the root electrode wire, a torch 115 for the root non-electrode wire, and a face electrode wire. The torch 120 is disposed off the plane P on which it is disposed. Therefore, the torch 125 for the face non-electrode wire has a predetermined angle β with respect to the plane P (see FIG. 3). Thus, the face non-electrode wire torch 125 is out of the plane P, so that the distance between the root electrode wire torch 110 and the face electrode wire torch 120 is reduced, whereby the root electrode and the non-electrode The range in which the torch for wires 110 and 115 and the torch 120 and 125 for the face electrode and the non-electrode wire are oscillated is increased, so that molten metal is more smoothly supplied to the weld.

In addition, the face non-electrode wire torch 125 also has a predetermined direction with respect to the gravity direction in order to supply the non-electrode wire W 4 into the arc made by the electrode wire W 3 of the face electrode wire torch 120. Has an angle α 4 .

The angle α 4 formed by the face non-electrode wire torch 125 is 10 to less than the angle formed by the face electrode wire torch 120 because the face non-electrode wire torch 125 is located out of the plane. 25 degrees is preferable. Within this range, the face non-electrode wire torch 125 can not only supply the non-electrode wire W4 into the arc formed by the electrode wire W3, but also give priority to the face electrode wire torch 120. It may not be located close to.

In addition, the angle β formed between the face non-electrode wire torch 125 and the plane P is preferably between 5 and 30 °. Within this range, the non-electrode wire torch 125 is a torch for face electrode wire. There is no interference with the torch 115 for 120 or the root non-electrode wire, and when oscillated to the root side, it does not cause interference with the ultra-thick plate 170 disposed on the side.

5 and 6 show a second embodiment of the present invention. As can be seen in FIGS. 5 and 6, in the second embodiment, the root electrode and the non-electrode are the same as the first embodiment, and the torch 210 and 215 for the root electrode and the non-electrode wire and the root electrode and the non-electrode contact tip ( 212 and 217, respectively, and the face electrode and the non-electrode include torches 220 and 225 for the face electrode and the non-electrode wire, and the face electrode and the non-electrode contact tip 222 and 227, respectively.

In addition, the torch 210 for the root electrode wire supplies the electrode wire W1 and forms a predetermined angle α 1 with respect to the gravity direction, and the torch 215 for the root non-electrode wire W2 is a non-electrode wire W2. ) Is supplied to the arc formed by the electrode wire W1, and a predetermined angle α 2 is formed with respect to the gravity direction.

The torch 220 for the face electrode wire supplies the electrode wire W3 and forms a predetermined angle α 3 with respect to the gravity direction, and the torch 225 for the face non-electrode wire forms the non-electrode wire W4. It supplies to the arc which the electrode wire W3 forms, and forms predetermined angle (alpha) 4 with respect to the gravity direction.

Unlike the electrode wires W1 and W3 that generate arcs, the non-electrode wires W2 and W4 do not generate arcs, and when the arc is generated, the electron wires are moved to pull the electrode wires W1 and W3. However, in the case of the non-electrode wires W2 and W4, there is no movement of electrons, so that the non-electrode wires W2 and W4 have the same straightness as the electrode wires W1 and W3, compared to the electrode wires W1 and W3. It is not placed close together and is not fed to the desired location.

In particular, when the non-electrode wires W2 and W4 are not supplied to the arc, since only the electrode wires W1 and W3 are melted by the heat of the arc, the amount of heat input required for welding is increased, and the non-electrode wires W2 and W4 are used. The contact with the welding material 230 causes a disruption in the wire supply.

Thus, in the second embodiment of the present invention, unlike the first embodiment, the distance between the contact tips 217 and 2227 of the root and face non-electrode wires W2 and W4 and the weldment 230 is different from the root and face electrode. Preferably, the contact tips 212 and 222 of the wire are disposed closer than the distance of the weldment 230.

In the above description, the first and second embodiments of the present invention have been described, but the present invention is not limited to the above embodiments.

110: torch for root electrode wire
112: root electrode contact tip 115: torch for root non-electrode wire
117: root non-electrode contact tip
120: torch for face electrode wire
122: face electrode contact tip 125: torch for face non-electrode wire
127: Face non-electrode contact tip
130: welding material 140: backing portion
150: copper 160: carbon dioxide
170: ultra thick plate

Claims (7)

A torch for the root and face electrode wires on which the electrode wires are mounted at the tip; And
A torch for the root and face non-electrode wires, the non-electrode wires being mounted at the tip and disposed between the torch for the root and the face electrode wires;
Including;
The torch for root non-electrode wire has a larger angle with respect to the direction of gravity than the torch for root electrode wire,
And the torch for face non-electrode wire has a smaller angle with respect to the direction of gravity than the torch for face electrode wire. The method of claim 1,
And the torch for face non-electrode wire is out of the plane formed by the torch for the root and the face electrode wire. delete The method of claim 1,
The torch for root electrode wire and the torch for face non-electrode wire form an angle of 10 to 25 ° with respect to the direction of gravity. The method of claim 1,
The torch for root non-electrode wire and the torch for face electrode wire form an angle of 15 to 30 ° with respect to the direction of gravity. The method of claim 2,
And the torch for face non-electrode wire forms an angle of 5 to 30 ° with respect to the plane formed by the root and torch for face electrode wire. A torch for the root and face electrode wires on which the electrode wires are mounted at the tip; And
A torch for the root and face non-electrode wires, the non-electrode wires being mounted at the tip and disposed between the torch for the root and the face electrode wires;
Including;
The torch for the root and face electrode wire and the torch for the root and face non-electrode wire are respectively connected to the root and face electrode contact tip and the root and face non-electrode contact tip,
And the distance between the root and face non-electrode contact tip and the weldment is closer than the distance between the root and face non-electrode contact tip and the weldment.
.
KR1020100136109A 2010-12-27 2010-12-27 Tandem Electro Gas Arc Welding Device KR101253892B1 (en)

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KR101253892B1 true KR101253892B1 (en) 2013-04-16

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH071126A (en) * 1993-06-15 1995-01-06 Mitsubishi Heavy Ind Ltd Automatic horizontal position one side welding method
KR20100072822A (en) * 2008-12-22 2010-07-01 주식회사 포스코 Tandem electro gas arc welding apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH071126A (en) * 1993-06-15 1995-01-06 Mitsubishi Heavy Ind Ltd Automatic horizontal position one side welding method
KR20100072822A (en) * 2008-12-22 2010-07-01 주식회사 포스코 Tandem electro gas arc welding apparatus

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