KR101707398B1

KR101707398B1 - Submerged welding apparatus

Info

Publication number: KR101707398B1
Application number: KR1020150161170A
Authority: KR
Inventors: 김영주; 조한진; 허만주
Original assignee: 대우조선해양 주식회사
Priority date: 2015-11-17
Filing date: 2015-11-17
Publication date: 2017-02-15

Abstract

Disclosed is a submerged welding device. The welding device includes: a carriage; a connection boom connected to the top of the carriage; a wire reel connected to one end of the connection boom and around which a wire is wound; a weaving unit connected to the other end of the connection boom and reciprocating and transferring a torch in a width direction of a weld line; a wire supply unit supplying the wire to the torch from the wire reel; and a support bracket interposed between the weaving unit and the wire supply unit and supporting the wire supply unit to enable the torch to rotate at a predetermined angle around a Z-central axis of the wire supply unit. Accordingly, the submerged welding device enables the effective T-shaped joint welding with the configuration, thereby improving welding efficiency and a welding quality, preventing muscular skeletal diseases, and improving a working environment.

Description

[0001] SUBMERGED WELDING APPARATUS [0002]

The present invention relates to a submerged welding apparatus, and more particularly, to a submerged welding apparatus capable of easily performing T-type joint welding.

Generally, a large structure requiring welding such as a ship requires assembling work to interconnect many blocks manufactured by connecting small plates.

In the production of large ships and offshore structures, T-shaped joint structures are also increasing with the increase of marine volume. In case of general T-shaped joint plate vertical welding, the welding productivity is lowered due to the manual work performed by the FCAW torch, so that the welding process lead time is increased and the welding quality is lowered due to repeated multi-layer welding have.

According to the prior art, when manufacturing plates, plates, blocks and blocks in the manufacture of large structures requiring welding such as large ships or ships, the steel plate and the steel plate are welded. Welding of steel plate is done by submerged Arc Welding (SAW) after super-layer welding with CO ₂ welding with relatively low heat input.

Submerged arc welding welds two or more welded joints as heat obtained by generating an arc between the wire and the base material under the granular flux. At this time, it is covered with an arc flux and is not exposed to the outside, and the flux protects the refining operation of the weld metal by blocking the air. Such submerged arc welding has a very high thermal efficiency and can achieve a welding speed more than three times higher than that of covered arc welding.

In such a submerged arc welding apparatus, it is known to employ a weaving unit that reciprocates the welding torch in the width direction of the weld line to improve welding productivity. In order to perform T-joint welding using such a welding apparatus, it is required to arrange the welding torch so as to be inclined.

However, according to the prior art, as the welding torch is confined to a certain position of the weaving unit, it is restricted to rotate the welding torch when it is applied to T-joint welding. If the welding torch is not properly aligned with the welded portion of the T-joint, there is a problem that an under-penetration phenomenon occurs due to a deviation from the shooting point of the welded portion of the T-joint.

The welding area of the vertex of the T-joint weld is narrow, arc instability may occur during welding while moving the welding torch, and a short may occur during welding when the flux (filler) insertion nozzle is large.

Korea Utility Model Registration 20-0473041

SUMMARY OF THE INVENTION It is an object of the present invention to provide a submerged welding apparatus capable of performing butt joint welding using a submerged welding apparatus and easily performing T-type joint welding.

According to one aspect of the present invention, there is provided a welding apparatus comprising: a carriage reciprocating in parallel with a weld line of a welding object; A connecting boom connected to an upper portion of the carriage and having both ends protruded from the carriage; A wire reel connected to one end of the connecting boom and wound with a wire; A weaving unit connected to the other end of the connecting boom to reciprocally transport the torch in the width direction of the weld line; A wire supply unit for supplying the wire from the wire reel to the torch; And a support bracket interposed between the weaving unit and the wire supply unit to support the wire supply unit so that the torch can rotate at a predetermined angle with respect to the Z central axis of the wire supply unit, Is provided.

Wherein the support bracket has a first connection part connected to a movable part of the weaving unit; A second connection unit connected to the wire supply unit; And a bridge portion interposed between the first connection portion and the second connection portion and spaced apart in a direction orthogonal to the longitudinal axis of the first connection portion.

The bridging portion may be inclined at a predetermined angle with respect to the longitudinal axis of the first connection portion.

The weaving unit includes: a support bracket connected to the other end of the connecting boom; A weaving bracket connected to an upper portion of the support bracket so as to be rotatable via a weaving pin; A weaving motor supported on one side of the support bracket; A weaving cam connected to the motor shaft of the weaving motor; A weaving shaft having one end rotatably connected to the weaving cam; And a weaving support having one end connected to the other end of the weaving shaft and the other end connected to the weaving bracket, and the first connection portion of the support bracket may be connected to the upper end of the weaving bracket.

A reinforcing plate may be interposed between the first connection portion and the weaving unit, and between the second connection portion and the wire supply unit.

The torch may be disposed in parallel with the central axis in the Z direction of the wire supply unit during butt welding and may be disposed at an angle to the central axis in the Z direction of the wire supply unit when the T-joint is welded.

According to one embodiment of the present invention, according to the present invention, it is possible to perform T-type joint welding by using a submerged welding apparatus, thereby enabling submerged automatic welding by a weaving method, thereby improving welding productivity and welding quality As well as improving the prevention and work environment of musculoskeletal diseases.

1 is a perspective view showing a configuration of a submerged welding apparatus according to an embodiment of the present invention.
2 is a front view of a submerged welding apparatus according to one embodiment of the present invention.
3 is a top view of a submerged welding apparatus according to one embodiment of the present invention.
4 is a side view of a submerged welding apparatus according to one embodiment of the present invention.
5 is an exploded perspective view showing a configuration of a weaving unit of a submerged welding apparatus according to an embodiment of the present invention.
6 is a perspective view showing a state where butt welding is performed using a submerged welding apparatus according to an embodiment of the present invention.
FIG. 7 is a perspective view showing a state in which T-type joint welding is performed using a submerged welding apparatus according to an embodiment of the present invention. FIG.
8 is a side cross-sectional view showing a state in which a T-joint welding is performed using a submerged welding apparatus according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It will be apparent to those skilled in the art that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know.

FIG. 2 is a front view of a submerged welding apparatus according to an embodiment of the present invention. FIG. 3 is a cross-sectional view of a submerged welding apparatus according to an embodiment of the present invention. 4 is a side view of a submerged welding apparatus according to an embodiment of the present invention.

1 to 4, the submerged welding apparatus 1 includes a carriage 10, a connecting boom 110, a torch unit 100, a rotating unit 200, a wire feeding unit 170, (190), and a support bracket (500).

The carriage 10 may be constituted by a moving carriage which can run in parallel with the welding line 5 of the object 3 to be welded. The carriage 10 may include a main body 11 and a traveling wheel 13 capable of moving on an upper surface of the object to be welded 3 and a traveling handle 15 capable of being gripped by an operator for traveling.

The carriage 10 can be provided in a form in which the upper surface of the object to be welded 3 can be runnable or can be provided to slide on the rails 7. The carriage 10 is configured so as to run in one direction (arrow B) in parallel with the weld line 5 of the welding object 3 and to be reversed in a direction opposite to the one direction (arrow A direction). The torch unit 100 may include a connecting boom 110, a torch 130, a wire reel 150, and a hopper 160.

The rotation unit 200 is installed at the center of the carriage 10 to rotate the rotation center of the torch unit 100 on the carriage 10. The rotary unit 200 is configured to reverse the torch unit 100 in accordance with the running direction of the carriage 10. [

The rotating unit 200 includes a mounting block 210 coupled to the top of the carriage 10, a rotating block 230 rotatably coupled to the top of the mounting block 210, And includes a rotary arm (250).

A support member 260 for supporting the hopper 160 and the control unit 300 may be provided on the rotation block 230. The support member 260 includes a hopper support hole 261 into which the hopper arm 161 supporting the hopper 160 is inserted and a control unit support hole 263 into which the control unit support arm 301 of the control unit 300 is inserted May be formed.

The connecting boom 110 is supported horizontally through the rotating block 230 of the rotating unit 200. A wire reel 150 is installed at one end of the connecting boom 100, 110 is provided with a torch 130 at the other end.

The torch (130) is installed at the other end side of the connecting boom (110) to weld the weld line (5). A wire feed unit 170 for feeding a welding wire (not shown) from the wire reel 150 to the upper portion of the torch 130 and a compression unit (not shown) for pushing the welding wire to the feed roller 171 of the wire feed unit 170 180).

A weaving unit 190 may be installed at the other end of the connecting boom 110 to feed the torch 130 in the direction orthogonal to the longitudinal direction of the weld line 5, that is, in the width direction of the carriage 10. A support bracket 500 is connected between the weaving unit 190 and the wire supply unit 170.

The support bracket 500 is configured to allow the torch 130 to be rotated at a predetermined angle with respect to the Z-axis central axis of the wire supply unit 170. [ That is, the support bracket 500 supports the reducer portion 173 of the wire supply unit 170 so as to extend to the outside of the weaving unit 190. As a result, the torch 130 connected to the wire feeding unit 170 is allowed to rotate at an angle of, for example, 30 degrees with respect to the Z axis of the wire feeding unit 170 without interfering with the weaving unit 190. Thus, when the T-joint is welded, the torch 130 can be easily tilted at a predetermined angle, thereby improving productivity and quality of the T-joint welding.

In the butt welding in which the two welding objects are welded to each other, the support bracket 500 may be removed and the decelerating portion 173 of the wire feeding unit 170 may be directly connected to the upper portion of the weaving unit 190. In this case, the torch 130 may be disposed in the concave groove 193b to which the weaving pin 192 (see Fig. 1) of the weaving unit 190 is connected.

The wire reel 150 is installed at the other end of the connecting boom 110 and the wire reel 150 is wound with a welding wire provided to the torch 130. The welding wire is supplied from the wire reel 150 to the torch 130 by the wire supply unit 180 and an arc is generated at the end of the torch 130 to be melted.

On both sides of the torch 130, a replenishing material jetting nozzle 140 is provided to supply the replenishing material to the front and rear sides of the torch 130 (see FIG. 2). The replenishment redistribution nozzle 140 is fed from the hopper 160 to the replenishment redistribution nozzle 140 via a replenishment feed pipe 168 (see FIG. 4) connected to the hopper 160. The supplementary re-spray nozzles 140 are arranged on the front and rear sides along the traveling direction of the torch 130 and can be selectively supplied according to the thickness of the object 3 to be welded. That is, when the thickness of the object to be welded 3 is thick, it can be simultaneously supplied to the front and rear sides of the torch 130 through the two replenishing material injection nozzles 140. When the thickness of the object to be welded 3 is thin, The replenishing material may be supplied in front of the torch 130 through the replenishing material jetting nozzle 140 disposed on the front side of the torch 130. [

According to the present invention, the replenishing material jetting nozzles 140 are provided on the front and rear sides of the torch 130, and the torch 130 and the replenishing material jetting nozzles 140 are arranged in a line along the longitudinal direction of the weld line During the welding according to the take-up, the interference of the torch 130 and the filler nozzle 140 with the welding object during the application with a narrow weld, such as a T-joint weld, is prevented and unstable arcing And the occurrence of a short circuit can be prevented.

The hopper 160 can be supported by a support member 260 provided on the upper portion of the rotation block 230 of the rotation unit 200 as a case in which a replenishing material (for example, flux) required for welding is accommodated. The hopper 160 is supported in the hopper hole 261 of the support member 260 via the hopper arm 161 (see Figs. 1 and 3)

The welding apparatus 1 may further include a control unit 300 for controlling the welding condition and the weaving condition of the torch 130. The control unit 300 is configured to rotate through the rotating unit 200 together with the torch unit 100 and is configured to rotate separately from the torch unit 100. [ When the operation unit of the control unit 300 is reversed during the reversal of the torch unit 100, the control unit 300 is rotated to a position before the inversion, for example, so that the operator can easily perform the operation. The control unit 300 is supported by the control unit support arm 301 through the control unit support hole 263 of the support member 260. [

5 is an exploded perspective view showing a configuration of a weaving unit of a submerged welding apparatus according to an embodiment of the present invention.

5, a weaving unit 190 according to an embodiment of the present invention includes a support bracket 191, a weaving bracket 193, a weaving motor 195, a weaving cam 197, a weaving shaft 198, And a weaving support (199).

The support bracket 191 is connected to the other end of the connecting boom 110 (see Figs. 1 and 3).

The weaving bracket 193 is rotatably connected to the supporting bracket 191 via the weaving pin 192. The other side of the weaving bracket 193 is movably supported by the support bracket 191 through the spring support 193a.

The weaving motor 195 is fixed to one side of the support bracket 191 through the motor bracket 194.

The weaving cam 197 is connected to the motor shaft of the weaving motor 195 and rotated so that a plurality of cam holes 197a for changing the coupling position with the weaving shaft 198 are disposed at an angle . The weaving cam 197 is supported by the motor bracket 194 through the bearing unit 196 so as to be smoothly rotatable.

One end of the weaving shaft 198 is rotatably connected to the weaving cam 197 and the other end of the weaving shaft 198 is rotatably connected to the weaving support 199. The weaving shaft 198 is changeably coupled to the plurality of cam holes 197a of the weaving cam 197 to allow adjustment of the weaving width.

The weaving support 199 is coupled to one side of the weaving bracket 193.

The support bracket 500 includes a first connection portion 510 coupled to the upper end of the weaving bracket 193, a second connection portion 550 connected to the reduction portion 173 (see FIG. 3) of the wire supply unit 170, A bridge connecting between the first connection part 510 and the second connection part 550 and connecting the second connection part 550 in a direction substantially orthogonal to the longitudinal axis A of the first connection part 510, 530 < / RTI >

The bridging portion 530 is formed to be inclined at a predetermined angle (?) With respect to the longitudinal axis (A) of the first connection portion (510).

When the weaving motor 195 is driven to rotate the weaving cam 197, the weaving shaft 198 and the weaving support 199 are interlocked and the weaving bracket 193 is rotated relative to the supporting bracket 191 And is pivoted from side to side around the weaving pin (192).

The support bracket 500 connected to the upper end of the weaving bracket 193 is pivoted so that the wire supply unit 170 connected to the second connection portion 550 of the support bracket 500 is pivoted. As a result, the torch 130 connected to the wire feeding unit 170 is oscillated and is reciprocally transported in the width direction of the weld line.

A reinforcing plate 501 is interposed between the upper portion of the first connecting portion 510 and the upper end of the weaving bracket 193. A reinforcing plate 501 is interposed between the second connecting portion 550 and the decelerating portion 173 of the wire feeding unit 170 The wire feeding unit 170 can be firmly supported on the weaving unit 190 through the support bracket 500. [

In another embodiment of the present invention, the weaving unit 190 may include a linear motion driving system including a driving motor and a rotary screw, a transfer nut reciprocating along the outer periphery of the rotary screw, and the like, on the above-described cam structure. In another embodiment, the weaving unit 190 may include a gear drive system using a gear assembly such as a rack or a pinion, or may include a hydraulic drive system including an air cylinder and a piston. The weaving unit 190 may include any suitable manner of moving the wire supply unit to reciprocate the torch 130. [

6 is a perspective view showing a state where butt welding is performed using a submerged welding apparatus according to an embodiment of the present invention.

6, a torch 130 is placed on the weld line 5 to perform butt joint welding, for example, with a V-shaped weld line.

In this case, the torch 130 is arranged vertically in parallel with the Z axial center axis direction of the wire feeding unit 170. [

Thus, the torch 130 is placed on the weld line 5 to perform the welding, while the carriage 10 travels along the rails lying on the upper surface of the welding object 3 or the upper surface of the welding object 3.

The wire supply unit 170 may be directly connected to the upper portion of the weaving bracket 193 of the weaving unit 190 without the support bracket 500. [ In this case, the torch 130 is disposed in the concave portion 193b of the weaving unit 190.

FIG. 7 is a perspective view showing a state in which a T-type joint welding is performed using a submerged welding apparatus according to an embodiment of the present invention, and FIG. 8 is a perspective view of a submerged welding apparatus according to an embodiment of the present invention Sectional view showing a state in which T-type joint welding is carried out using the T-joint.

7 and 8, in order to weld a welding object having a first base material T1 and a second base material T2 disposed at right angles to each other, the torch 130 is welded to the Z axis of the wire feeding unit 170 Is inclined at a predetermined angle? Here, the wire supply unit 170 is connected to the weaving bracket 193 of the weaving unit 190 via the support bracket 500 and is swung together with the weaving bracket 193, and the torch 130 is moved to the weaving unit 190 so as not to interfere with each other.

As a result, the torch 130 can be rotated at a predetermined angle, for example, 30 degrees or more with respect to the Z axis of the wire feeding unit 170, without being constrained by the weaving unit 190. [

Therefore, the problem that the torch 130 is easily aligned with the shooting point P of the T-shaped joint welded portion and insufficient penetration or undercut occurs can be solved.

According to the present invention, it is possible to reduce occurrence of arc instability by appropriately aligning the torch 130 to the shooting point P.

According to the present invention, the replenishing material jetting nozzles 140 are provided on the front and rear sides of the torch 130, and the torch 130 and the replenishing material jetting nozzles 140 are arranged in a line along the longitudinal direction of the weld line It is possible to eliminate the interference of the torch 130 and the replenishing material spray nozzle 140 with the welding targets T1 and T2 during the welding of the narrow T-joint welded portion according to the present invention.

According to the present invention, it is possible to perform T-type joint welding by using a submerged welding apparatus, and it is possible to perform submerged automatic welding by a weaving method, thereby improving welding productivity and welding quality, Can be improved.

Although the present invention has been described with reference to the accompanying drawings and the preferred embodiments described above, the present invention is not limited thereto but is limited by the following claims. Accordingly, those skilled in the art will appreciate that various modifications and changes may be made thereto without departing from the spirit of the following claims.

1: Submerged welding apparatus 10: Carriage
100: torch unit 110: connecting boom
130: torch 170: wire feed unit
190: Weaving unit 191: Support bracket
193: Weaving bracket 195: Weaving motor
197: Weaving cam 198: Weaving shaft
199: Weaving support 500: Support bracket
510,550: first and second connecting portions 530:
501, 503:

Claims

A carriage reciprocating in parallel with a weld line of a welding object;
A connecting boom connected to an upper portion of the carriage and having both ends protruded from the carriage;
A wire reel connected to one end of the connecting boom and wound with a wire;
A weaving unit connected to the other end of the connecting boom to reciprocate a torch for welding the welding line in the width direction of the welding line;
A wire supply unit for supplying the wire from the wire reel to the torch; And
And a support bracket interposed between the weaving unit and the wire supplying unit to support the wire supplying unit so that the torch can rotate at a predetermined angle with respect to the Z-axis central axis of the wire supplying unit,
Wherein the support bracket has a first connection part connected to a movable part of the weaving unit;
A second connection unit connected to the wire supply unit; And
And a bridge portion interposed between the first connection portion and the second connection portion and spaced apart in a direction orthogonal to the longitudinal axis of the first connection portion.

delete

The submerged welding apparatus according to claim 1, wherein the bridging portion is formed to be inclined at a predetermined angle with respect to the longitudinal axis of the first connection portion.

The weaving machine according to claim 3,
A supporting bracket connected to the other end of the connecting boom;
A weaving bracket connected to an upper portion of the support bracket so as to be rotatable via a weaving pin;
A weaving motor supported on one side of the support bracket;
A weaving cam connected to the motor shaft of the weaving motor;
A weaving shaft having one end rotatably connected to the weaving cam; And
And a weaving support having one end connected to the other end of the weaving shaft and the other end connected to the weaving bracket,
Wherein the first connection portion of the support bracket is connected to the upper end of the weaving bracket.

The submerged welding apparatus according to claim 1, wherein a reinforcing plate is interposed between the first connecting portion and the weaving unit and between the second connecting portion and the wire feeding unit.

2. The submerged welding apparatus according to claim 1, wherein the torch is disposed in parallel with the Z-axis central axis of the wire supply unit during butt welding.

The submerged welding apparatus according to claim 1, wherein the torch is arranged to be inclined at a predetermined angle with respect to the Z-axis central axis of the wire feeding unit when the T-joint is welded.