JP6797052B2 - Groove filler spraying equipment and submerged arc welding equipment - Google Patents

Description

The present invention relates to a groove filler spraying device and a submerged arc welding device.

A granular flux is sprayed on the welded portion, the welded portion is covered with the granular flux in advance, and the welding wire is inserted into the flux to generate an arc between the member to be welded and the tip of the welding wire. Submerged arc welding is known for welding. Patent Document 1 discloses a submerged arc welding apparatus including a groove filler spraying device, a flux spraying apparatus, and the like for performing this submerged arc welding. The groove filler spraying device supplies the groove filler to the groove portion in front of the torch in the welding progress direction. This groove filler smoothes the unevenness in the groove due to the bead by temporary welding and the groove processing accuracy, and alleviates the influence on the bead.

Japanese Unexamined Patent Publication No. 2008-238199

However, when submerged arc welding is performed while spraying the groove filler, the groove filler is sprayed out of a predetermined target position due to the influence of the magnetic field formed by the welding current at the time of welding. There is. If the groove filler is sprayed at a position deviated from a predetermined position, the groove shape is not constant and it becomes difficult to form a smooth bead surface.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a groove filler spraying device and a submerged arc welding device capable of reliably spraying a groove filler to a target position while suppressing the influence of a magnetic field. To do.

The present invention has the following configuration.
A groove filler spraying device used in a submerged arc welding apparatus that welds the welded member while spraying the groove filler on the groove of the member to be welded.
A communication passage that supplies the groove filler to the groove and has a spray port at the tip,
A magnetic shield portion arranged so as to cover the spray port side of the communication passage, and
A filler supply adjusting unit, which is arranged in the middle of the communication passage and increases or decreases the amount of the groove filler sprayed,
With
The continuous passage has an upstream side passage and a downstream side passage.
The filler supply adjusting unit includes a rotor interposed between the upstream side passage and the downstream side passage, and a motor for driving the rotor rotation shaft of the rotor.
In the rotor, a plurality of filler pockets are defined along the circumferential direction of the rotor on the outer peripheral surface of the rotor exposed in the communication passage, and the filler pockets are formed from the upstream passage in accordance with the rotation of the rotor. The groove filler filled in is supplied to the downstream passage.
Groove filler spraying device.

A submerged arc welding device equipped with the above-mentioned groove filler spraying device.

According to the present invention, the groove filler can be reliably sprayed to the target position while suppressing the influence of the magnetic field. This makes it possible to form a homogeneous and smooth bead surface.

It is a figure for demonstrating embodiment of this invention, and is the side view of the submerged arc welding apparatus provided with the groove filler spraying apparatus. It is a perspective view of the groove filling material spraying apparatus shown in FIG. It is an enlarged perspective view of the vicinity of the magnetic shield part shown in FIG. It is a vertical sectional view of the magnetic shield part seen from the V direction of FIG. It is an enlarged view of the main part of the filler supply adjustment part shown in FIG. It is a perspective view of the rotor shown in FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a view for explaining an embodiment of the present invention, and is a side view of a submerged arc welding apparatus provided with a groove filler spraying apparatus.
The submerged arc welding device 100 includes a groove filler spraying device 200. The groove filler spraying device 200 supplies the groove filler to the groove of the steel plate 15 which is a member to be welded in front of the torch in the welding progress direction.

First, the basic configuration of the submerged arc welding apparatus 100 will be described.
The steel plate 15 is conveyed on a conveyor (not shown) to a predetermined welding position, and the welding line is arranged so as to extend in the left-right direction of FIG.

In the submerged arc welding apparatus 100, the support member 17 is supported by a traveling carriage (not shown) on the welding machine traveling beam, and is driven to reciprocate in the left-right direction of FIG. Therefore, the support member 17 can move to a predetermined welding position along the welding line of the steel plate 15.

On the support member 17, a first torch 27 having a first electrode 19, a second torch 29 having a second electrode 21, and a third torch 31 having a third electrode 23 are arranged in series in the welding line direction. The first torch 27, the second torch 29, and the third torch 31 are fixed to the gantry 25 included in the support member 17. In the first electrode 19, the second electrode 21, and the third electrode 23, welding wires from the first torch 27, the second torch 29, and the third torch 31 are connected to the groove 11 of the steel plate 15 (see FIG. 2). Will be sent to.

A support arm 40 is fixed to the support member 17 at a portion of the gantry 25 in front of the welding direction. A terminal detector 33 for detecting the end of the steel plate 15 is arranged in front of the support arm 40 in the welding direction. The termination detector 33 rotationally drives the rotary shaft 35 fixed to the support arm 40, the arm 37 rotatably supported by the rotary shaft 35, the sensor 39 attached to the tip of the arm 37, and the rotary shaft 35. The arm drive actuator 41 is provided. The driving force of the arm drive actuator 41 is transmitted to the rotating shaft 35 via an appropriate speed reducer, and the arm 37 is rotationally driven between the horizontal position (operating mode) and the vertical position (retracting mode). The detected end position information is used by the first torch 27, the second torch 29, and the third torch 31 to control the end timing of welding along the welding line.

A copy detector 47 is arranged behind the end detector 33 of the support arm 40. The copying detector 47 detects the position of the welding line by moving in the groove along the welding line guided by the groove 11. The copying detector 47 controls the first torch 27, the second torch 29, and the third torch 31 so that they can move along the welding line reliably, and the first torch 27, the second torch 29, and the third torch 31 are controlled. The welding wire fed from the torch 31 is reliably supplied into the groove. The copy detector 47 is also attached to the fixing member 42 so as to be able to move up and down by an appropriate drive device.

Further, the flux spraying nozzle 51 is arranged on the first torch 27 on the front side in the welding direction, and the flux spraying nozzle 53 is arranged on the third torch 31 on the front side in the welding direction. The flux spraying nozzle 51 sprays the flux forward in the welding direction of the first electrode 19 and the second electrode 21, and the flux spraying nozzle 53 sprays the flux forward in the welding direction of the third electrode 23.

A flux recovery unit 49 is installed at the rear portion of the support member 17 in the welding direction of the frame 25. The flux recovery unit 49 sucks and recovers the flux that remains on the groove from the flux spray nozzle 51 and the flux spray nozzle 53 without melting during welding. The flux recovery unit 49 includes a flux recovery nozzle 55 that sucks flux, a support portion 59 that swingably supports the flux recovery nozzle 55 within a predetermined range via a swing shaft 57, and a guide extending in the vertical direction. It includes a rail 61, a slider 63 to which a support portion 59 is fixed and slides with respect to the guide rail 61, and a cylinder 67 in which the tip of a cylinder rod 65 is connected to the slider 63.

When the cylinder 67 is driven to regress the cylinder rod 65, the slider 63 connected to the cylinder rod 65 moves upward along the guide rail 61. On the other hand, when the cylinder 67 is driven to advance the cylinder rod 65, the slider 63 descends along the guide rail 61, and the lower end of the flux recovery nozzle 55 is located on the groove. The flux recovery nozzle 55 is located on the groove behind the welding direction of the third electrode 23 on the welding line in the operating mode, and rises along the guide rail 61 together with the slider 63 in the retracting mode.

The submerged arc welding apparatus 100 having the above configuration includes a control unit (not shown). Based on the termination detection signal from the sensor 39 of the termination detector 33, the control unit drives the arm 37 of the termination detector 33, raises the copying detector 47, and supplies the groove filler 13 from the filler hopper. The welding conditions of the first electrode 19, the second electrode 21, and the third electrode 23, the rise of the flux recovery nozzle 55, and the like are controlled according to a predetermined sequence.

Next, the configuration of the groove filler spraying device 200 will be described.
FIG. 2 is a perspective view of the groove filler spraying device shown in FIG. 1, and FIG. 3 is an enlarged perspective view of the vicinity of the magnetic shield portion shown in FIG.
The groove filler spraying device 200 includes a hopper 43, a continuous passage including an upstream passage 75 and a downstream passage 77, a filler supply adjusting portion 73, a filler spraying portion 45, and a magnetic shield portion 71. Have. The filler supply adjusting unit 73 has a function of increasing or decreasing the amount of the groove filler 13 sprayed. One end of the filler spraying portion 45 is connected to the downstream passage 77, and the other end has a spraying port 69 (see FIG. 3). The magnetic shield portion 71 is arranged so as to cover the spray port 69 side of the communication passage.

Specifically, the support member 17 is provided with a hopper 43 for storing the groove filler on the front surface of the gantry 25. Further, an upstream passage 75, which is a base end portion of the continuous passage, is connected to the lower end of the hopper 43. The upstream passage 75 communicates with the upper part of the filler supply adjusting unit 73. The filler supply adjusting portion 73 is fixed to the adjusting portion arm 85 provided in front of the support member 17 in the welding direction. The lower part of the filler supply adjusting unit 73 communicates with the downstream passage 77. Then, the downstream passage 77 is connected to the filler spraying portion 45 arranged behind the copying detector 47 in the welding direction via the fixing member 42 fixed to the support arm 40. The filler spraying portion 45 is supported by a support pipe 87 fixed to the fixing member 42. The downstream passage 77 is made of a flexible resin or rubber hose.

The tip of the filler spraying portion 45 is arranged in front of the first electrode 19 in the welding direction toward the groove 11. Therefore, the groove filler fed from the hopper 43 is filled into the groove of the steel plate 15 from the tip of the filler spraying portion 45. The filled groove filler uniformly fills the inside of the groove 11 to alleviate the unevenness of the groove shape.

The filler supply adjusting unit 73 is provided in the middle of the communication passage connecting the hopper 43 and the filler spraying unit 45. That is, a pair of upper and lower flanges 83A and 83B are provided on the motor bracket 79 attached to the adjusting arm 85 (see also FIG. 1). The casing 81 of the filler supply adjusting unit 73 is fixed to the pair of flanges 83A and 83B. A speed reducer 110 and a motor 111 for driving a rotor are attached to the casing 81.

A support pipe 87 fixed to a fixing member 42 (see FIG. 1) is juxtaposed in the filler spraying portion 45. Further, the lower end of the downstream passage 77 is connected to the upper end of the hollow cylindrical copper nozzle member 91.

A nozzle position adjusting bracket 89 is slidably attached to the lower end of the support pipe 87 along the longitudinal direction of the support pipe 87. The nozzle position adjusting bracket 89 integrally supports the nozzle member 91. The lower end of the nozzle member 91 is a spray port 69, and the upper end is an insertion port that is slidably inserted inside the downstream passage 77. The nozzle member 91 can be positioned with respect to the steel plate 15 at a desired separation distance by fixing and releasing the vertical position with respect to the support pipe 87 by the nozzle fixing knob 93 of the nozzle position adjusting metal fitting 89. Instead of the nozzle member 91, the hose tip of the downstream passage 77 may be extended and arranged as it is.

Further, on the support pipe 87, a magnetic shield position adjusting metal fitting 95 is slidably attached below the nozzle position adjusting metal fitting 89 along the longitudinal direction of the support pipe 87. The magnetic shield position adjusting bracket 95 supports the cylindrical magnetic shield portion 71. The magnetic shield portion 71 is made of a steel material, and is arranged so as to coaxially cover the outer peripheral surface of the spray port 69 of the nozzle member 91. The magnetic shield portion 71 can be positioned with respect to the steel plate 15 at a desired separation distance by fixing and releasing the vertical position with respect to the support pipe 87 by the shield fixing knob 97 of the magnetic shield shield position adjusting bracket 95.

That is, the magnetic shield portion 71 is configured so that the relative position of the magnetic shield shield position adjusting metal fitting 95 with respect to the spray port 69 can be easily changed by adjusting the position along the support pipe 87. That is, the magnetic shield portion 71 can extend to the steel plate 15 side from the spray port 69, and the magnetic shield portion 71 is arranged on the side opposite to the steel plate 15 side from the spray port 69 to provide the nozzle member 91. It can be easily extended from the lower end of the magnetic shield portion 71.

The magnetic shield portion 71 is used to shield the magnetic field generated from the first torch 27, the second torch 29, and the third torch 31 (see FIG. 1). When the magnetic shield portion 71 is provided in a magnetic field, magnetic field lines are concentrated and pass through the magnetic shield portion 71 itself, and the magnetic field does not affect the groove filler 13 such as granular iron existing inside the cylinder. .. As a result, the magnetic field is shielded inside the cylinder of the magnetic shield portion 71, and the magnetic force acting on the groove filler 13 passing through the inside of the cylinder is suppressed.

If necessary, a leveling plate fixing bracket 101 is attached to the outer periphery of the magnetic shield portion 71, and the leveling plate 99 is fixed to the leveling plate fixing bracket 101. The leveling plate fixing bracket 101 can also be slid vertically with respect to the magnetic shield portion 71 by fixing and releasing the leveling plate fixing knob 103.

The leveling plate 99 has a tapered shape that gradually narrows toward the lower tip, and has a flat portion 105 at the tip. The flat portion 105 can be inserted into the groove 11 by sliding in the vertical direction. When the leveling plate 99 is attached, the groove filler 13 inserted into the groove 11 can be further made uniform to a desired height from the bottom of the groove 11 by the flat portion 105.

FIG. 4 is a vertical cross-sectional view of the magnetic shield portion 71 as seen from the V direction of FIG.
In the groove filler spraying device 200, the magnetic shield portion 71 is preferably arranged so as to be separated from the outer peripheral surface of the nozzle member 91.

Next, the filler supply adjusting unit 73 will be described.
FIG. 5 is an enlarged view of a main part of the filler supply adjusting unit 73 shown in FIG.
The filler 107 is housed inside the casing 81 of the filler supply adjusting unit 73. The rotor 107 is interposed between the upstream passage 75 and the downstream passage 77 of the communication passage. The rotor 107 is arranged in a direction in which the rotor rotation axis 109 is orthogonal to the extending direction (vertical direction in FIG. 5) of the upstream side passage 75 and the downstream side passage 77. A motor 111 for driving the rotor is connected to the rotor rotating shaft 109 via a speed reducer 110 fixed to the motor bracket 79.

The motor 111 is driven by a control unit (not shown). The filler supply adjusting unit 73 can increase or decrease the supply amount of the groove filler 13 from the nozzle member 91 according to the rotation speed (rotation speed) of the motor 111. The control unit increases or decreases the rotation speed (rotation speed) of the motor 111 according to the spraying height of the groove filler 13 in the groove 11, the traveling speed of the submerged arc welding device 100, and the like.

FIG. 6 is a perspective view of the rotor 107 shown in FIG.
In the rotor 107, a plurality of filler pockets 115 are defined along the circumferential direction of the rotor 107 on the outer peripheral surface 113 of the rotor exposed in the communication passage. Inside the casing 81, the rotor 107 substantially closes the upstream passage 75 with the rotor outer peripheral surface 113 to prevent the groove filler 13 from freely falling. A filler pocket 115 is located on the outer peripheral surface 113 of the rotor facing the outlet of the upstream passage 75, and the groove filler 13 that falls down the upstream passage 75 is housed in the filler pocket 115. When the rotor 107 is rotationally driven, the filler pocket 115 containing the groove filler 13 moves downward, and the groove filler 13 accommodated in the filler pocket 115 is discharged to the downstream passage 77. Will be done. In the stationary state of the rotor 107, the groove filler 13 is not discharged to the downstream passage 77, and when the rotor 107 is rotated, an amount of the groove filler 13 corresponding to the rotation speed (rotation speed) of the rotor 107 is discharged to the downstream side. It is supplied to the passage 77.

Next, the basic operation of the submerged arc welding apparatus 100 having the above configuration will be described.
When the submerged arc welding apparatus 100 starts welding, the first electrode 19, the second electrode 21, and the third electrode 23 are set on the tab plate at the welding start end. Further, the preceding termination detector 33 and the copying detector 47 are set on the steel plate 15. In this state, the flux recovery nozzle 55 is in a state of being retracted upward.

When welding is started, the submerged arc welding apparatus 100 travels in the welding progress direction while continuing welding by the first electrode 19, the second electrode 21, and the third electrode 23. At the time of this welding, the welding wires sent from the first electrode 19, the second electrode 21, and the third electrode 23 are inserted into the groove 11 of the steel plate 15. Then, the flux is sprayed from the flux spraying nozzle 51 to the groove 11 at a position in front of the first electrode 19 in the welding direction. At a position further forward in the welding direction of the flux spraying nozzle 51, the groove filler 13 is supplied to the groove 11 from the filler spraying portion 45 of the groove filler spraying device 200. Therefore, the tips of the welding wires sent out from the first electrode 19, the second electrode 21, and the third electrode 23 are inserted into the flux piled up on the groove filler 13 in the groove 11 and arced. The discharge is done.

Then, when the flux recovery nozzle 55 reaches the vicinity of the start point of the welding bead, the flux recovery nozzle 55 is lowered by a manual switch to start collecting unnecessary flux.

In the groove filler spraying device 200, the spray port 69 of the groove filler 13 is arranged in front of the submerged arc welding apparatus 100 in the welding direction, and the groove filler 13 is supplied to the groove 11 prior to welding. .. That is, the groove filler 13 thrown into the hopper 43 passes through the continuous passage and is sprayed from the spray port 69 to the groove 11 of the steel plate 15.

A flux spraying nozzle 51, a first electrode 19, a second electrode 21, a flux spraying nozzle 53, and a third electrode 23 are arranged in this order behind the groove filler spraying device 200 in the welding direction. Therefore, the flux is accumulated on the groove filler 13 supplied to the bottom of the groove 11, and each welding wire protruding from the first electrode 19, the second electrode 21, and the third electrode 23 is placed in the flux. Will be inserted.

As shown in FIG. 4, a welded portion that has been temporarily welded may partially exist as a convex portion 117 at the bottom of the groove 11. In that case, the convex portion 117 is filled with the sprayed groove filler 13 and flattened. Further, the groove filler 13 sprayed on the convex portion 117 may be raised more than the portion where the convex portion 117 does not exist. Even if this swelling occurs, it is surely flattened by the leveling plate 99 attached to the rear of the spray port 69 in the welding direction. As a result, the difference in groove shape can be eliminated and a stable bead can be formed.

Here, the groove filler 13 sprayed from the spray port 69 through the communication passage is driven by the welding current supplied to the welding wire by the first electrode 19, the second electrode 21, and the third electrode 23 behind the welding direction. It is affected by the generated magnetic field. The groove filler 13 affected by the magnetic field becomes agglomerates in the communication passage due to, for example, magnetic attraction, and clogs the communication passage. As a result, the groove filler 13 may not be sprayed, or even if it is sprayed, it may not be sufficiently supplied to the target position of the groove 11. When the groove filler 13 is insufficient due to these causes, the dispersed flux is piled up in an uneven shape. As a result, a smooth bead surface is not formed.

Therefore, in the groove filler spraying device 200 having the present configuration, the outer peripheral surface of the spray port 69 is covered with the magnetic shield portion 71. Therefore, the magnetic shield portion 71 suppresses the magnetic field generated by the welding current during welding from acting on the communication passage on the spray port 69 side. As a result, the groove filler 13 is suppressed from being affected by the magnetic field, and is smoothly discharged from the spray port 69. As a result, the groove filler 13 is always supplied to the groove 11 in a constant supply amount. As a result, filling can always be performed at a uniform height. The leveling plate 99 is not always necessary, and if the groove filler 13 can be stably supplied in a desired supply amount, the groove filler 13 will be piled up substantially flat in the groove 11.

Further, in the groove filler spraying device 200, when the magnetic shield portion 71 extends from the spray port 69 toward the steel plate 15, the groove filler 13 is inserted from the spray port 69 into the groove 11. It is possible to suppress the influence of the magnetic field until then. As a result, after the groove filler 13 comes out from the spray port 69 toward the groove 11, it is possible to suppress the change in the falling direction due to the magnetic force during the falling. As a result, the groove filling material 13 can be filled to a target predetermined position with high accuracy without waste.

Further, in the groove filler spraying device 200, the supply amount of the groove filler 13 can be appropriately increased or decreased by providing the filler supply adjusting unit 73.
In the filler supply adjusting unit 73, the movement of the groove filler 13 is stopped by the rotor 107 arranged at the outlet of the upstream passage 75. Then, when the rotor 107 rotates, the filler pocket 115 located in the upstream passage 75 is separated from the outlet of the upstream passage 75, and the groove filler 13 that has entered the filler pocket 115 is moved to the downstream passage 77. Fall into. As a result, the groove filler 13 proportional to the rotation speed (rotation speed) of the rotor 107 can be supplied to the groove 11, and the amount of the groove filler 13 sprayed on the groove 11 can be reduced with a simple structure. It can be controlled accurately and easily.

In this way, the filler supply adjusting unit 73 can prevent the supply shortage and the excess supply of the groove filler 13 to the groove 11, and reduce the welding speed in order to obtain the required sufficient supply amount. , Unnecessary unnecessary spraying can be prevented.

Then, in the submerged arc welding apparatus 100 according to this configuration, the groove filler 13 is less likely to be affected by the magnetic field by the groove filler spraying device 200, and the desired amount of the groove filler 13 is placed at the target position of the groove 11. It is always reliably supplied. Therefore, the groove filler 13 is evenly arranged in the groove 11 along the welding direction. As a result, stable arc welding can be performed and a homogeneous and smooth bead surface can be formed.

The present invention is not limited to the above-described embodiment, and can be modified or applied by those skilled in the art based on the combination of the configurations of the embodiments with each other, the description of the specification, and well-known techniques. It is the planned invention and is included in the scope of seeking protection.

As described above, the following matters are disclosed in this specification.
(1) A groove filler spraying device used in a submerged arc welding apparatus that welds the welded member while spraying the groove filler to the groove of the member to be welded.
A communication passage that supplies the groove filler to the groove and has a spray port at the tip,
A magnetic shield portion arranged so as to cover the spray port side of the communication passage, and
Groove filler spraying device.
According to this groove filler spraying device, a magnetic shield portion is provided so as to cover the spray port side of the communication passage. The magnetic shield portion suppresses the magnetic field generated by the welding current during arc welding from acting on the communication passage near the spray port. As a result, the groove filler is prevented from being partially agglomerated due to the influence of the magnetic field and causing clogging in the continuous passage, and is smoothly discharged from the spray port. As a result, the groove filler can always be supplied into the groove at a constant ratio, and the height can be made uniform in the groove.

(2) The groove filler spraying device according to (1), wherein the magnetic shield portion is arranged so as to cover the spray port.
According to this groove filler spraying device, the magnetic shield portion is arranged so as to cover the spray port, so that the groove filler is affected by the magnetic field before it falls from the spray port to the groove. Can be suppressed. As a result, the change in the drop direction of the groove filler due to the magnetic force can be suppressed, and the groove filler can be stably supplied to the target position.

(3) The groove filler spraying device according to (1), wherein the spray port is arranged so as to project from the tip of the magnetic shield portion.
According to this groove filler spraying device, since the spray port protrudes from the tip of the magnetic shield portion, the spray port can be arranged close to the groove. As a result, the groove filler can be stably supplied to the target position.

(4) The groove filler spraying according to any one of (1) to (3), which is arranged in the middle of the communication passage and includes a filler supply adjusting unit for increasing or decreasing the spraying amount of the groove filler. apparatus.
According to this groove filler spraying device, it is possible to prevent the supply amount of the groove filler from being insufficient and to prevent unnecessary spraying of the groove filler, and to always supply an appropriate amount of the groove filler. You can.

(5) The continuous passage has an upstream side passage and a downstream side passage.
The filler supply adjusting unit includes a rotor interposed between the upstream side passage and the downstream side passage, and a motor for driving the rotor rotation shaft of the rotor.
In the rotor, a plurality of filler pockets are defined along the circumferential direction of the rotor on the outer peripheral surface of the rotor exposed in the communication passage, and the filler pockets are formed from the upstream passage in accordance with the rotation of the rotor. The groove filler spraying device according to (4), wherein the groove filler filled in is supplied to the downstream passage.
According to this groove filler spraying device, when the rotor rotates, the filler pocket located in the upstream passage is separated from the outlet of the upstream passage, and the groove filler that has entered the filler pocket is downstream. Fall into the side passage. As a result, the groove filler can be supplied to the groove in proportion to the rotation speed (rotation speed) of the rotor, and the amount of the groove filler sprayed on the groove can be controlled accurately and easily with a simple structure. it can.

(6) A submerged arc welding apparatus provided with a groove filler spraying apparatus according to any one of (1) to (5).
According to this submerged arc welding device, the groove filler spraying device makes the groove filler less susceptible to the influence of the magnetic field, and the groove filler is sufficiently supplied to the target position of the groove. As a result, a homogeneous and smooth bead surface can be formed.

11 Groove 13 Groove filler 15 Steel plate (member to be welded)
41 Arm drive actuator 45 Filler spraying part 69 Spraying port 71 Magnetic shield part 73 Filler supply adjustment part 75 Upstream passage (continuous passage)
77 Downstream passage (continuous passage)
100 Submerged Arc Welder 107 Rotor 109 Rotor Rotating Shaft 113 Rotor Outer Surface 115 Filler Pocket 200 Groove Filler Spreader

Claims (4)

A groove filler spraying device used in a submerged arc welding apparatus that welds the welded member while spraying the groove filler on the groove of the member to be welded.
A communication passage that supplies the groove filler to the groove and has a spray port at the tip,
A magnetic shield portion arranged so as to cover the spray port side of the communication passage, and
A filler supply adjusting unit, which is arranged in the middle of the communication passage and increases or decreases the amount of the groove filler sprayed,
With
The continuous passage has an upstream side passage and a downstream side passage.
The filler supply adjusting unit includes a rotor interposed between the upstream side passage and the downstream side passage, and a motor for driving the rotor rotation shaft of the rotor.
In the rotor, a plurality of filler pockets are defined along the circumferential direction of the rotor on the outer peripheral surface of the rotor exposed in the communication passage, and the filler pockets are formed from the upstream passage in accordance with the rotation of the rotor. The groove filler filled in is supplied to the downstream passage.
Groove filler spraying device. The groove filler spraying device according to claim 1, wherein the magnetic shield portion is arranged so as to cover the spray port. The groove filler spraying device according to claim 1, wherein the spray port is arranged so as to project from the tip of the magnetic shield portion. A submerged arc welding apparatus including the groove filler spraying apparatus according to any one of claims 1 to 3 .

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