JPH10128541A - Welding equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently spray flux along the weld line of an object to be welded. SOLUTION: A flux circulator 4 is rub in parallel with a welding carriage 3 running along a weld line 9 of objects 1, 1 to be welded. At the state a flux hopper 17 of the welding carriage 3 is aligned with a flux supply hose 26 of the flux circulator 4, by closing a stop valve 28, flux is sprayed on the weld line 9 from the flux hopper 17. Further, at the state the flux hopper 17 of the welding carriage 3 is aligned with the flux supply hose 26, the flux stored in the flux hopper 17 is sprayed on the weld line 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a welding carriage for welding along a welding line of an object to be welded, and a flux circulator for spraying a flux on the welding line and collecting a flux remaining on the welding line. More particularly, the present invention relates to a welding apparatus that can reliably spread a flux on a welding line.

[0002]

2. Description of the Related Art Conventionally, a method for welding a long welding line such as a steel plate to be welded, for example, is disclosed in Japanese Patent Publication No. 51-71.
There is a submerged welding apparatus as described in Japanese Patent Publication No. 36-36. This submerged welding apparatus has a pair of steel plates to be welded, and a welding carriage that travels along a welding line of each welding steel plate, and applies an electric current to a welding wire supplied to the welding carriage. An arc is generated between the steel plate to be welded and the welding wire, and the welding wire melted by the arc is sequentially welded along the welding line.

[0003] In addition, when a phenomenon in which an arc is generated by flowing an electric current through a welding wire as described above is performed in the atmosphere, oxygen and nitrogen in the atmosphere are absorbed by the molten metal to generate iron oxide. Because a good molten metal cannot be obtained, a powdery material called flux is scattered from the flux circulator mounted on the welding carriage to the welding line, and the flux is melted by the heat of fusion of the molten metal to generate gas, Shields molten metal from the atmosphere. The flux remaining on the steel plate to be welded without being melted is recovered by the flux circulator for reuse.

In a conventional submerged welding apparatus (Japanese Patent Publication No. 51-7136), a flux circulator is run on the same carriage as a welding carriage to spray a flux on a welding line. When a large amount of flux is used, the flash circulator becomes a considerably large device, and it may happen that the flux circulator cannot be mounted on the welding carriage. In such a case, a flux circulator is separately arranged above the welding carriage so as to be able to travel separately, and both are run synchronously, and a flux supply hose connected to the Franks circulator is fixed to the welding carriage. The flux is sprayed from the flux supply hose to the welding line.

[0005]

However, depending on the submerged welding apparatus, the traveling distance of the flux circulator may not be the same as the traveling distance of the welding carriage and may be shorter. In this case, on the basis of the welding carriage, the flux circulator has a positional relationship moved forward and backward with respect to the welding carriage. Therefore, when welding is started along a welding line such as a steel plate to be welded, first, a welding carriage located behind the flux circulator in the direction of the welding line is run to perform welding along the welding line, and flux circulation is performed. Weld the flux circulator at the opposite position under the vessel, but eventually the flux circulator reaches the running limit and stops, and it is necessary to stop only after the welding carriage travels for a while and stops .

When the welding carriage and the flux circulator travel as described above, the flux supply hose fixed between them must be long to allow the welding carriage to travel with respect to the flux circulator. Occurs. Therefore, at the beginning and end of welding to the steel plate to be welded, if only the welding carriage travels away from the flux circulator, the flux supply hose becomes gentle and the flux does not flow through the flux supply hose. Spraying on the welding line becomes impossible.
Also, when the welding carriage is in the opposite state of the flux circulator, the supply hose is too long and slackened,
The flux does not flow through the flux supply hose, and cannot be sufficiently supplied to the welding line. That is, when the flux flows by gravity in the flux supply hose,
When the inclination of the flux supply hose becomes gentle as described above, the flow (fall) stops, and the flux cannot be spread on the welding line, so that welding cannot be performed.

The welding apparatus of the present invention has been made to solve this problem, and it is an object of the present invention to allow a sufficient flux to be spread along a welding line of an object to be welded.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a welding apparatus, comprising: a welding carriage which travels along a welding line of an object to be welded; And a flux circulator for performing supply and recovery of the flux.The welding carriage receives the supply of the flux from the flux circulator and sprays the welding wire on the welding line in a state relative to the flux circulator. In addition, the stored flux is sprayed on the welding line in a non-relative state to the flux circulator. In this way, when the traveling distance of the welding carriage is longer than the flux circulator, the procedure of spraying the flux to the welding line is changed by the relative relationship between the welding carriage and the flux circulator to sufficiently spread the flux to the welding line. it can.

According to a second aspect of the present invention, in the welding apparatus according to the first aspect, the welding carriage has a flux hopper for storing and dispersing the flux, and the flux circulator has a flux hopper. A flux supply pipe is connected to the flux hopper in a relative state so that flux can be supplied at the shortest distance, and the flux supply pipe is provided with an on-off valve. As a result, the flux supply hose does not need to be lengthened as the traveling distance of the welding carriage increases, and the shortest distance to the opposing flux hopper can be used. The position is perpendicular to the running direction of the carriage, and the flux does not stop at the hose.

According to a third aspect of the present invention, there is provided a welding apparatus having a detecting means for detecting a relative state between the welding carriage and the flux circulator, and the on-off valve is opened and closed by detecting a relative state of the detecting means. Things. Thus, the flux can be automatically supplied to the flux hopper without the operator operating the on-off valve.

According to a fourth aspect of the present invention, the welding carriage and the flux circulator run synchronously in their relative state. Thus, when the welding carriage is brought into a relative state with respect to the flux circulator, they run synchronously, so that the flux can be sequentially supplied from the flux circulator to the flux hopper in the relative state.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a welding apparatus according to a specific embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a front view of the welding device according to the present embodiment, and FIG. 2 is a side view of the welding device according to the present embodiment.

Referring to FIGS. 1 and 2, a welding apparatus X according to this embodiment includes a welded steel plate holding cart 2 (hereinafter simply referred to as a “holding cart 2”) for holding opposed steel plates 1 and 1 to be welded. A welding carriage 3 and a flux circulator 4 are provided as main parts, each of which is independently movably disposed on a holding trolley 2. The holding trolley 2 is equipped with a backing device 6 having a plurality of transfer roller groups 5. It is made to be able to run.

The holding trolley 2 extends in the running direction of the welding carriage 3 with a length of the steel plates 1, 1 to be welded, and clamps the steel plates 1, 1 on the transfer roller group 5. Separate steel plate pressing members 7, 8 (hereinafter, referred to as "garter beams 7, 8") are arranged, and can be moved up and down by, for example, an electric chain block as shown in FIG. I have. As shown in FIG. 1, each garter beam 7, 8 extends in the traveling direction of the welding carriage 3, and extends in the extending direction (the traveling direction of the welding carriage 3). 1 is pressed toward the holding cart 2. A welding table 10 is provided on the lower part 7A of the garter beam 7 so as to be able to move horizontally in a direction orthogonal to the welding line 9 of the steel plates 1 and 1 to be welded. A rail extending in the direction in which the garter beams 7 and 8 extend is mounted. Thus, when the garter beam 7 and the welding line 9 are displaced, the welding table 10 is horizontally moved so that the rail (the plurality of welding heads of the welding carriage 3) and the welding line 9 are aligned in parallel. Has become.

The welding carriage 3 has a welding unit 15 equipped with a plurality of welding heads, and is mounted on a welding carriage 16 that travels independently on a rail of the welding table 10. The traveling trolley 16 of the welding carriage 3 is provided with a flux hopper 17. The flux hopper 17 stores the flux supplied from the flux circulator 4 as described later, and transfers the flux to the welding wire 9.
It has a function of spraying on. That is, the flux hopper 17 has a conical shape that opens toward the flux circulator 4 (upper side) and is reduced in diameter toward the steel plates 1 and 1 to be welded.
The flux is sprayed on the welding line 9 through 7A (shown in FIG. 2).

In the upper part of each of the garter beams 7, 8,
A flux circulator 4 for supplying the flux to the flux hopper 17 and recovering the flux remaining on the welding line 9 and a plurality of wire bobbins 19 for feeding a welding wire to each welding head of the welding unit 15 are arranged. I have. Each of the wire bobbins 19 and the flux circulator 4 are mounted on a flux traveling carriage 20 which can travel in the direction in which the garter beams 7 and 8 extend.
This flux traveling vehicle 20 is arranged on a welding traveling vehicle 16 on which the welding unit 15 is mounted, and runs in parallel (the traveling vehicles 16 and 20 travel relative to each other), and a The traveling distance is shorter than that of the traveling carriage 16 for welding because it interferes with a chain block that moves up and down.

The flux circulator 4 has a flux collection hose 25 connected to the suction port, and collects the remaining flux sprayed on the welding wire 9 through the flux collection hose 25. A flux supply hose 26 is connected to the lower end side of the flux circulator 4 and extends linearly toward the welding carriage 15 in a direction perpendicular to the traveling direction of the flux traveling vehicle 20. The flux supply hose 26 has a length capable of supplying the flux in the shortest distance without contacting the flux hopper 17 in a state where the welding carriage 3 and the flux circulator 4 are opposed to each other. Has an on-off valve 28 connected to a controller 27 mounted on the controller.

The opening / closing valve 28 is output by the controller 27 based on a detection signal of a detecting means 30 (shown in FIG. 1) for detecting the relative positions of the traveling vehicles 16, 20 (the supply hose 26 and the flash hopper 17). The on-off valve is opened and closed by an on-off signal. The detecting means 30 is, for example, each traveling vehicle 1
It comprises a light projector 31 and a light receiver 32 provided in each of the devices 6 and 20. The floodlight 31 is located in the vicinity of the flux hopper 17, and the flux traveling vehicle 2
0 so that the detection light is projected toward
6. The light receiver 32 is located in the vicinity of the flux supply hose 26 and receives the detection light projected by the light projector 31 so as to receive (detect) the detection light.
It is provided in.

The welding apparatus X in the present embodiment is configured as described above. Next, a procedure for welding the steel plates 1 and 1 to be welded by the welding apparatus X will be described.

First, the temporarily welded steel plates 1, 1 are
After being held on each transfer roller 5 of the holding cart 2, each garter beam 7,
Each of the steels 1 to be welded 1 is clamped by the backing device 8 and the backing device 6.

When the steel plates 1, 1 to be welded are clamped by the garter beams 7, 8 and the backing device 6 as described above, welding of the steel plates 1, 1 to be welded to the welding line 9 by the welding carriage 3 is started. . Then, in order to perform welding on the welding line 9 of each of the steel plates 1, 1 to be welded, the traveling vehicles 16, 20
As shown in FIG. 1, the rail (each welding head of the welding unit 15) and the welding line 9 are moved by moving the welding table 10 horizontally until it comes into contact with one end of each garter beam 7, 8. Are set in parallel so that welding by the welding carriage 3 is possible.

Next, the welding carriage 16 is caused to travel toward the other end of each of the garter beams 7 and 8, so that welding is performed along the welding line 9 by each of the welding heads of the welding unit 15. At this time, the flash hopper 17 is also moved following the traveling of the traveling vehicle 16, so that the flash stored in the flux hopper 17 is sprayed on the welding line 9. Accordingly, when the welding carriage 3 is not in a relative state with the flux circulator 4 (non-relative state), the flux stored in the flux hopper 17 traveling with the welding carriage 3 is directly passed through the welding pipe 17A to the welding line. 9 to be sprayed.

As described above, welding is performed by the welding carriage 3 along the welding line 9 of the steel plates 1 and 1 to be welded, and the detection light emitted by the light projector 31 of the detecting means 30 is received by the light receiver 32.
Is received (detected), the flux hopper 17 of the traveling vehicle 16 is brought into a state of facing the flash supply hose 26 (the state shown by the dashed line in FIG. 1). When the light receiver 32 receives the detection light as described above, the controller 27 controls the welding carriage 3 (the flux hopper 3) to operate the flux circulator 4.
(Flux supply hose 26) is determined to be lower side, and a valve opening command is output to the on-off valve 28 to open the valve, and the traveling vehicle 20 is connected to the traveling vehicle 16 with the flux supplying hose 26 and the flux. The synchronous running is performed so that the hopper 17 and the hopper 17 face each other. Thereby, the flux circulator 4
The flux is supplied to the flux hopper 17 through the flux supply hose 26 in the vertical position,
The flux can be sprayed from the flux hopper 17 through the spray pipe 17A onto the welding line 9 of each of the steel materials 1 and 1 to be welded. In addition, each steel plate to be welded is provided for welding.
The remaining flux on the upper side is the flux collection hose 25
Is recovered in the flux circulator 4.

The welding carriage 3 and the flux circulator 4 run in synchronization with each other, so that the welding carriage 3
Welds the welding wire 9 of the steel plates 1 and 1 to be welded while receiving the supply of the flux. First, the traveling carriage 20 of the flux circulator 4 abuts on the other end sides of the garter beams 7 and 8. The running is stopped. At this time, the traveling of the welding carriage 3 is not stopped, but is moved away from the flux circulator 4.
The light receiver 32 does not receive (detect) the detection light projected by the light projector 31 of the above.

Therefore, the controller 27 controls the welding carriage 3
It is determined that the (flux hopper 17) and the flux circulator (flux supply hose 26) are in a non-relative state where they do not face each other, and a valve closing command is output to the on-off valve 28 to close the valve. As a result, the supply of the flux from the flux circulator 4 to the flux hopper 17 is stopped, and thereafter, the traveling carriage 16 (welding carriage 3) moves the garter beams 7,
The flux stored in the flux hopper 17 is scattered over the welding wire 9 to perform welding until it stops by contacting the other end of the wire 8.

As described above, according to the welding apparatus in the present embodiment, in a non-relative state where the welding carriage 3 and the flux circulator 4 are not opposed to each other, the flux can be sprayed from the flux hopper 17 of the welding carriage 3 to the welding line 9. ,
In addition, when the welding carriage 3 is in a state where the flux circulation 4 is in a relative state, the on-off valve 28 is opened and the flux supplied from the flux circulator 4 through the flux supply hose 26 can be sprayed from the flux hopper 17 to the welding line 9. 3 for the welding conditions in which the traveling distance is longer than that of the flux circulator 4,
Flux can be sprayed along the welding line 9.

The flux supply hose 26 is connected to the flux circulator 4 without connecting the welding carriage 3.
Even if the traveling distance of the welding carriage 3 becomes longer, it is not necessary to increase the traveling distance, and the shortest distance can be used for the opposing flux hopper. Therefore, the flux supply hose 26 is always at a vertical position facing the flux hopper 17 of the welding carriage 3, and the flux can be reliably supplied to the flux hopper 17 without stopping in the flux supply hose 26. .

Although the welding apparatus according to the present embodiment has been described for automatically opening and closing the on-off valve 28,
The present invention is not limited to this, and the operator may open and close the flux hopper 17 of the welding carriage 3 in a state where the flux hopper 17 faces the flux circulator 4 (the flux supply hose 26).

[0029]

As described above, according to the first aspect of the present invention, in a non-relative state in which the welding carriage and the flux circulator are not opposed to each other, the flux stored in the welding carriage can be sprayed on the welding line. In a state where the welding carriage and the flux circulation are in a relative state, the flux supplied from the flux circulator can be scattered over the welding line and collected, so that the amount of flux provided for welding increases,
Flux can be sprayed along the welding line of each workpiece, even for welding conditions that require the use of a large flux circulator and for welding conditions in which the welding carriage travels longer than the flux circulator. High quality welding can be performed.

In the welding apparatus according to the second aspect, in addition to the effect of the first aspect, the flux supply hose does not need to be lengthened even if the traveling distance of the welding carriage is long, and the flux supply hose is not required to be opposed to the flux hopper. The hose is always perpendicular to the running direction of the welding carriage, so that the flux does not stop at the hose and the flux is sufficiently transferred to the welding line via the flux hopper. Can be sprayed.

According to the welding apparatus of the third aspect, in addition to the effect of the second aspect, the flux can be automatically supplied to the flux hopper without the operator operating the on-off valve, thereby simplifying the welding operation. In addition, it is possible to quickly perform welding of each workpiece.

In the welding apparatus according to the fourth aspect, when the welding carriage is brought into a relative state with respect to the flux circulator, they run synchronously, so that the flux can be sequentially supplied from the flux circulator to the flux hopper in the relative state. Therefore, it is possible to spray a sufficient flush on the welding line.

[Brief description of the drawings]

FIG. 1 is a front view showing a welding device of the present invention.

FIG. 2 is a view as viewed in the direction of arrows AA in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Welded steel material 3 Welding carriage 4 Flux circulator 17 Flux hopper 26 Flux supply hose 28 On-off valve 30 Detecting means

Claims (4)

[Claims] 1. A welding carriage that travels along a welding line of an object to be welded and performs welding, and a flux circulator that travels in parallel on the welding carriage and supplies and recovers a flux. In a state relative to the flux circulator, the flux is supplied from the flux circulator and dispersed to the welding line, and the flux stored in a non-relative state to the flux circulator is applied to the welding line. A welding device characterized by spraying. 2. The welding carriage has a flux hopper for storing and dispersing the flux, and the flux circulator supplies the flux to the flux hopper in a shortest distance relative to the welding carriage. 2. The field welding apparatus according to claim 1, wherein the flux supply pipe is connected to the flux supply pipe, and an on-off valve is provided on the flash supply pipe. 3. 3. A detecting means for detecting a relative state between the welding carriage and the flux circulator, wherein the on-off valve is opened and closed by detecting a relative state of the detecting means. Item 3. The welding device according to Item 2. 4. The welding apparatus according to claim 1, wherein the welding carriage and the flux circulator run synchronously in their relative state.