KR101271890B1 - Electro gas arc welder - Google Patents

Abstract

An object of the present invention is to provide an electrogas arc welding apparatus and method capable of low heat input to reduce heat input, in order to achieve this, the electrode wire torch is equipped with an electrode wire at the tip; And a cut wire supply means for supplying cut wires to be melted by the arc generated by the electrode wires, thereby reducing heat input. A welding step of melting and welding the electrode wire with an arc; And a cut wire supplying step performed simultaneously with the welding step and supplying cut wires to be melted by the arc generated by the electrode wires.

Description

Electro gas arc welding device {ELECTRO GAS ARC WELDER}

The present invention relates to an electrogas arc welding apparatus and an electrogas arc welding method, and more particularly, to an electrogas arc welding apparatus and an electrogas arc welding method for supplying cut wires to an arc generated by electrode wires to achieve low heat input. It is about.

The electro gas arc welding method is a welding method that has been developed and applied to increase the welding productivity of thick plates required in shipbuilding.

Figure 1 shows such an electrogas arc welding device. Electro gas arc welding mainly uses carbon dioxide 60 as a protective gas, generates an arc by the electrode wire W1 supplied to the torch 10 for electrode wire, and this arc heat causes the torch 10 of the electrode wire to be heated. The welding is performed by melting the electrode wire W1.

A water-cooled copper immersion 40 is provided on the front surface of the welded material 30, and a fixed backing material 50 is provided on the back surface, and an arc generated between the supplied electrode wire W1 and the welded material 30 is provided. When the electrode wire W1 is melted to form the molten metal 32 and a predetermined amount of molten metal is formed, the electrode wire torch 10 is mounted, and the welding is fixed to the support part 70 so as to be movable in the vertical direction. This is a welding method in which the electrode wire torch 10 is moved through the driving means (not shown) of the carriage main body 80 and welded by moving the welding carriage main body upward.

The electrode wire W1 of the electrode wire torch 10 is supplied from the electrode wire supply means 91 through the welding carriage main body 80, and power is supplied from the power supply unit 92 to the electrode wire W1. In addition, the control unit 90 is connected to the electrode wire supply means 91, the power supply unit 92, the welding carriage body 80 to control the entire welding process.

In the tandem electro-gas arc welding method, the welded portion having a plate thickness of 50 mm or more must be filled with molten metal made of a welding material and a welded material by welding heat, and a high heat input welding of 500 kJ / cm or more is applied for this purpose. Due to such excessive welding heat, it is the cause of deterioration of the welded part, and expensive heat input material is applied to secure the heat input welded part quality, but anxiety about quality instability due to the quality deviation of the product is always pointed out.

In the present invention, to solve the above problems, it is an object of the present invention to provide an electro-gas arc welding apparatus and method capable of low heat input to reduce heat input.

In addition, an object of the present invention is to provide an electric gas arc welding apparatus and method for supplying a separate cut wire to the arc generated by the electrode wire to increase the welding efficiency and low heat input, but does not block the flow path due to the cut wire. It is done.

In addition, the present invention is to provide a cut wire with a protective gas, to improve the protection performance at the melting point due to the arc.

The present invention provides the following gas arc welding apparatus and gas arc welding method in order to achieve the above object.

The present invention provides a torch for electrode wires, the electrode wire is mounted on the tip; Cut wire supply means for supplying cut wires to be melted by an arc generated by the electrode wires, thereby reducing heat input; And a welding carriage body connected to the electrode wire torch and the cut wire supplying means, the welding carriage body oscillating and raising the electrode wire torch and the cut wire supplying means.

In the present invention, the cut wire hopper connected to the cut wire supply means; And a feed rate adjusting means for adjusting a supply amount of the cut wire between the cut wire hopper and the cut wire supply means, and the cut wire supply means may be arranged to supply the cut wire with the arc.

In addition, the supply speed adjusting means of the present invention comprises a rotating body comprising a plurality of transport space; It includes a drive unit for providing a driving force to the rotating body, it is preferable to be configured to adjust the supply amount of the cut wire by changing the amount of cut wire conveyed by the carrying space as the rotational speed of the rotating body changes.

In addition, the cut wire is pressurized and supplied to the gas after passing through the supply speed adjusting means, the gas may be supplied from a protective gas generating unit for providing a protective gas to the weld.

Further, the cut wire supplying means may include a metal tube at the distal end, and the metal tube may be connected to the vibration means to prevent the passage of the flow path caused by the cut wire.

On the other hand, the present invention is a gas arc welding method for supplying the electrode wire, and melting and welding the electrode wire by the arc generated by the electrode wire, supplying the arc cut wire generated by the electrode wire at the same time as the supply of the electrode wire. It provides a method of electrogas arc welding that is oscillated.

In addition, the step of adjusting the supply amount before the supply of the cut wire to the arc furnace is preferably performed.

In the present invention, through the above configuration, it is possible to provide an electrogas arc welding apparatus and method capable of low heat input to reduce heat input.

In addition, the present invention can provide an electric gas arc welding apparatus and method that can additionally supply a separate cut wire to the arc generated by the electrode wire to increase the welding efficiency and low heat input, but does not block the flow path due to the cut wire. .

In addition, in the present invention, by supplying the cut wire with the protective gas, it is possible to improve the protection performance at the melting point due to the arc.

1 is an example of a conventional electro gas arc welding apparatus.
2 is an embodiment of the electrogas arc welding apparatus of the present invention.
3 is an enlarged view of the supply speed adjusting means of FIG.
4 is an enlarged view of a welded part of FIG. 2.

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

2 shows a schematic diagram of an embodiment of an electrogas arc welding apparatus 100 of the present invention.

As shown in FIG. 2, the electrogas arc welding apparatus 100 of the present invention supplies cut wires that are movable together with the electrode wire torch 110 and the electrode wire torch 110 on which the electrode wire W is mounted at the tip. Means 120, which generates an arc by means of the electrode wires W, and with this arc heat the electrode wires W of the torch 110 for electrode wires and the cutwires CW of the cutwire supply means 120; Melting is a method in which welding is performed.

Here, the cut wire (CW) refers to a piece of wire cut out of the welding wire in mm units, and means a piece formed by cutting the welding wire in a linear form, the length of which preferably has a length between 2 and 20 mm. Preferably a length between 5 and 10 mm is preferred.

If the length is too small, it may not be supplied to the desired position by turbulent flow of the feeding process weld, and if the length is large, melting may be difficult beyond the arc range.

On the front of the material to be welded 130, a protective gas supply unit 160 for supplying carbon dioxide as a protective gas and a water-cooled copper immersion 140 are provided, and a fixed backing material 150 is provided on the back, and the electrode wires W are supplied. ), The electrode wire W and the cut wire CW are melted through an arc generated between the electrode to be welded and the welded material 130 to form the molten metal 132 and a predetermined amount of the molten metal is formed. The torch 110 for the electrode wire is mounted through the driving means (not shown) of the welding carriage body 180 as the welding carriage means, which is mounted with the 110 and the cut wire supply means 120 and is fixed to be movable in the vertical direction. The oscillation and welding carriage body 180 is a welding method of welding by moving upward.

Through the welding carriage body 180, the electrode wire W is supplied from the wire supply means 192 to the torch 110 for the electrode wire, and power is supplied from the power supply unit 191 to the electrode wire W.

In addition, the welding carriage body 180 is equipped with a cut wire hopper 181 for storing and supplying the cut wire CW, and a cut wire between the cut wire hopper 181 and the cut wire supplying means 120. Feed rate adjusting means 185 for adjusting the supply amount of CW) is disposed. The supply speed adjusting unit 185 carries and supplies a predetermined amount of cut wires CW from the cut wire hopper 181 to the rotating unit 182, and adjusts the rotation speed 182 to control the cut wires CW per hour. Adjust the supply. The feed rate adjusting means 185 will be described in detail later with reference to FIG. 3.

On the other hand, the cut wire hopper 181 is located at a position higher than the feed speed adjusting means 185, accordingly, from the cut wire hopper 181 to the feed speed adjusting means 185 by the weight of the cut wire CW. Supply is made. At this time, the cut wire hopper 181 is attached to the excitation means (181a), it can be configured to prevent the discharge port from the cut wire hopper 181 to the feed rate adjusting means 185 is blocked by the cut wire (CW). .

In addition, the cut wire CW supplied at a predetermined supply speed from the supply speed adjusting means 185 is connected to the protection gas generating unit 162 for generating and supplying the protection gas to the protection gas supply unit 160. Pressurized by a gas is supplied from the cut wire supply means 120 to the welding portion.

The supply speed adjusting means 185, the power supply unit 191, the wire supply means 192 and the oscillation driving means (not shown) is connected to the control unit 190, the progress of welding is managed by the control unit 190. .

3, the feed rate adjusting means 185, the cut wire hopper 181 and the cut wire supply means 120 of the present invention are shown.

As shown in FIG. 3, the excitation means 181a is attached to the cutwire hopper 181, and the excitation means 181a is preferably disposed at the outlet 181b side of the cutwire hopper 181. This is because the outflow portion 181b side of the cutwire hopper 181 is likely to be blocked due to the narrow flow path.

On the other hand, the outlet portion 181b is disposed adjacent to the rotating member 182 of the supply speed adjusting means 185. The rotating member 182 is provided with a plurality of transport spaces 182a capable of holding a predetermined amount of cut wires, and the rotating member 182 is connected to the rotating shaft of the rotation driving means 182b such as a motor.

Due to the rotation of the rotating member 182, the transport space 182a of the rotating member 182 is positioned below the outlet portion 181b of the cut wire hopper 181, and at this time, the weight of the cut wire CW The cut wire CW flows into the transport space 182a. Carrying space 182a is rotated in accordance with the rotation of the rotating member, the cut wire (CW) stacked over the outlet portion (181a) in the transport space 182a to the outlet portion (181b) of the cut wire hopper 181. By the next time is transferred to the transport space 182a, the transport space 182a is carried only a predetermined amount of cut wire (CW).

As the transport space 182a is rotated, the cut wire CW of the transport space 182a falls back from the transport space 182a by its own weight and flows into the gas mixing unit 184. At this time, since the transport space 182a is rotated, the blocking member 183 is disposed so that the cut wire CW does not protrude to the outside by the centrifugal force, or the transport speed adjusting means 185 is accommodated in the case. Do.

On the other hand, the cut wire CW dropped into the gas mixing part 184 flows into the cut wire inlet 184a of the gas mixing part 184, meets the gas inlet 184b, and is pushed by the gas pressure to cut the wire. It is supplied to the supply means 120, it is finally supplied to the welding portion.

The cut wire (CW), although short in length, is linear and has different flow characteristics than powder or wire. In particular, the diameter of the cut wire (CW) or longer is required, and because of the characteristics of the cut wire (CW), which is likely to cause clogging when the flow path is reduced, the cut wire (CW) is supplied in small quantities and in a quantitative manner. There is difficulty.

However, in this embodiment, it is possible to supply by a predetermined amount without reducing the diameter of the flow path of the cut wire (CW), it is possible to supply a quantitative without clogging due to the flow characteristics of the cut wire (CW). In addition, by controlling the rotational speed of the rotating member 182, the supply speed of the cut wire CW put into the welding portion can also be controlled, and therefore, the supply speed of the cut wire CW depending on the state of the arc or the degree of welding progress. It is possible to adjust.

In particular, unlike the supply of the non-electrode wire, in the case of the cut wire CW, the wire entanglement does not occur even if the supply wire is not immediately melted. Therefore, since the arc is oscillated in the electro gas arc welding, the unmelted cut wire CW is advantageous in that it has an opportunity to be melted again by oscillation of the arc.

4 is an enlarged view of FIG. 2. As shown in Figure 3, the cut wire supply means 120 is disposed in the direction of gravity, the flexible pipe 122 is connected to the metal tube 121, the metal tube 121 and the gas mixing unit 184 disposed on the weld side, And a connecting pipe 124 connecting the metal pipe 121 and the flexible pipe 122, and the torch 110 for the electrode wire is disposed to have a predetermined angle α with respect to the direction of gravity.

In addition, the cut wire supply means 120 is connected to the electrode wire torch 110 through the connecting member 118, the electrode wire torch 110 and the cut wire supply means 120 can move together. The connection member 118 includes a fixing part 123 for fixing the flexible tube 122 of the cut wire supply means 120 and a fixing part 115 for fixing the torch 110 for the electrode wire.

In addition, the connecting member 118 is equipped with a driving means 126 for vibrating the metal tube 121 in the gravity direction. Link 129 connecting the rotating member 127 connected to the rotating shaft of the drive means 126 and the protrusion 128 protruding from the rotating member and the constraining member 125 holding the protrusion 128 and the metal tube 121. As a result, the rotation of the driving means 126 is changed by vibration in the gravity direction of the metal tube 121. In addition to the vibration means such as the driving means 126, the rotating member 127, the projection 128 and the link 129 may be configured using other types of cams.

Since the metal tube 121 is shaken by the driving means 126, the cut wire supply means 120 may be prevented from being clogged due to entanglement or filling of the cut wire CW in the metal tube 121.

In the present invention, the cut wire (CW) is preferably supplied in the direction in which the arc is formed by the electrode wire (W), accordingly, the cut wire supply means 120 is vertically above the arc forming position of the electrode wire (W) It is preferable to be located at.

That is, the electrode wire W is supplied with a predetermined angle α with respect to the gravity direction to form an arc, and the cut wire CW supplies the cut wire CW in the gravity direction above the arc. Therefore, even if the electrode wire W is moved by the movement of the welding carriage main body 180, it is possible to stably supply the cut wire CW around an arc.

Alternatively, since the cut wire CW is supplied together with the protective gas, the cut wire CW may be supplied to a position where an arc of the electrode wire W is formed while having a predetermined angle with respect to the direction of gravity.

In the present invention, since the cut wire CW is introduced into the arc, it is possible to form more molten metal with the same heat input amount. In particular, in the case of the cut wire CW, since the straightness is not required unlike the wire and no coating is required, the cut wire CW is preferably formed of only the weld metal. That is, when the same amount of heat occurs with an arc, supplying the cutwire with the wire can be used to melt the cutwire further with the amount of heat required to melt the sheath of the wire than when only the wire is supplied, so that the amount of molten metal It can be formed much compared to the wire.

100: gas arc welding device 110: torch for electrode wire
115, 123: fixing part 118: connecting member
120: cut wire supply means 121: metal tube
122: flexible tube 124: connector
125: restraining member 126: driving means
129: link 130: welded material
132: molten metal 140: copper
150: backing material 160: protective gas supply unit
162: protective gas generating unit 180: welding carriage body
181: hopper 182: rotating member
182a: transport space 183: membrane member
184: gas mixing unit 185: supply speed adjusting means
190: control unit W: electrode wire
CW: cut wire

Claims (8)

A torch for electrode wires on which electrode wires are mounted at the tip;
Cut wire supply means for supplying cut wires to be melted by an arc generated by the electrode wires, thereby reducing heat input; And
And a welding carriage means connected to the electrode wire torch and the cut wire supply means and oscillating the electrode wire torch and the cut wire supply means. delete The method of claim 1,
A cutwire hopper connected to the cutwire supply means; And
Further comprising a feed rate adjusting means for adjusting the feed rate of the cut wire between the cut wire hopper and the cut wire supply means,
And the cut wire supply means is provided to supply the cut wire to the arc. The method of claim 3, wherein
The supply speed adjusting means includes a rotating body including a plurality of transport space; And a driving unit providing a driving force to the rotating body, wherein the supply speed of the cut wire is adjusted as the rotating speed of the rotating body changes. The method of claim 4, wherein
The cut wire is pressurized and supplied to the gas after passing through the supply speed adjusting means, the gas is supplied from the protective gas generating unit for providing a protective gas to the welding portion electrogas arc welding apparatus. The method of claim 5, wherein
The cut wire supplying means includes a metal tube at the front end, the metal tube is an electro-gas arc welding apparatus, characterized in that connected to the vibration means to prevent blockage of the flow path by the cut wire. delete delete

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