KR20140106157A - Welding device for object having a curve - Google Patents

Abstract

The present invention relates to a welding apparatus, which comprises an elbow mounting jig for lifting and fixing an elbow as an object to be welded and for supporting a welding portion of the elbow in an upward direction, A welding unit holding means for holding the welding unit; welding means for moving the welding unit in the left-right direction, the up-down direction, the back-and-forth direction with respect to the welding portion of the elbow in order to adjust the welding position of the welding electrode; Unit position adjusting means, and a control unit for controlling the welding unit and the welding electrode position adjusting means. Accordingly, the welding unit is movable in three axial directions, i.e., in the X, Y, and Z directions, with respect to the elbow weld portion to be worked, thereby achieving an accurate welding work.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a welding apparatus,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding apparatus, and more particularly, to a welding apparatus for a work having a curved line capable of welding a curved portion at the time of forming a large elbow tube as a workpiece having a curved line.

In general, steel pipes are mainly used for construction of water supply and sewerage and plants, and large-sized steel pipes are used for waterworks construction, which is one of large-scale plant construction.

The water pipe construction is largely composed of a tubular member, a tubular member, and a T-shaped tubular member which are linearly shaped according to the shape thereof. Accordingly, the pipe members are connected to each other to perform the waterway construction, and a welding technique is used to connect the pipe members to each other.

As described above, a welding apparatus for utilizing two pipe members having a circular cross section by welding with each other is disclosed in Korean Patent Registration No. 10-0829993.

In the apparatus for joining a steel pipe described in the above-mentioned Korean Patent, the ends of the steel pipe are formed into a predetermined roundness in a state of holding both steel pipes to be connected, the steel pipes are inserted and connected, And welding.

That is, the welding apparatus is constructed such that a rail is provided around a steel pipe, a welding robot is movably installed on the rail, and the welding robot connects the two steel pipes while running around the steel pipe along the rail.

Meanwhile, as described above, the pipe member used in the waterway construction is a curved pipe (hereinafter, referred to as an 'elbow'), which is a method different from the conventional method of forming a pipe member .

That is, the large elbow is cut into two curved lines on two steel plates, and both sides of the curved line-shaped plate member are raised or lowered to form a curved surface, and then the curved member is moved in a state in which the concave portions face each other The two side edges are brought into close contact with each other, and then they are welded and formed.

The welding operation performed in a state in which both side edges of the curved member are in contact with each other as described above is difficult and very troublesome because the welding electrode of the welding apparatus is moved while being kept at a constant distance from the welded portion and moving along the curved portion there was.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a welding apparatus and a welding method, And it is an object of the present invention to provide a welding apparatus to be worked.

According to an aspect of the present invention, there is provided a welding apparatus comprising: an elbow-mounting jig for lifting and fixing an elbow to be welded and supporting a welding portion of the elbow in an upward direction; A welding unit supporting means provided on the welding unit supporting means for adjusting the welding position of the welding rod, and a welding unit for supporting the welding unit on the welding portion of the elbow A welding unit position adjusting means for moving the welding unit in the left-right direction, the up-down direction and the back-and-forth direction, and a control unit for controlling the welding unit and the welding electrode position adjusting means.

The elbow mounting jig may further include a table for raising the elbow, a mounting means for mounting the elbow on the table, a supporting means for supporting the elbow mounted on the table by the mounting means, A tilting means for vertically erecting the table to rotate the table, and a rotating means for rotating the table.

Preferably, the elbow mounting means includes a pressing member which is raised over the inner circumferential surfaces at both ends of the elbow, and a fastening member which is screwed into the fastening groove formed in the table through the pressing member.

The elbow support means may include an engagement member that is engaged with the inner circumferential surfaces of the elbows at both ends of the elbow, a rotary member rotatably provided on the table, and a connection portion having one end connected to the engagement member, And a lever for rotating the rotating member.

The tilting means may include a support member having one end hinged to the ground and the other end movably coupled to the holding member, and a guide for guiding movement of the other end of the support member when the table is vertically erected, And an operating member which is hinged to the supporting member and is provided on the ground to press the supporting member.

The rotation means includes a main gear provided on a bottom surface of the table, an auxiliary gear provided on the fixing member and engaged with the main gear, and a first motor generating a rotational force for rotating the auxiliary gear .

The welding unit position adjusting means may include an X-axis moving unit for reciprocating the welding unit in the left-right direction (X-axis) with respect to the welded portion of the elbow, and an X-axis moving unit for moving the welding unit in the vertical direction A Y-axis moving unit for reciprocating the welding unit in the Y-axis direction), a Z-axis moving unit for reciprocating the welding unit in the forward-backward direction (Z-axis direction) with respect to the elbow, And a laser provided in the welding unit and serving as a guide for adjusting the position of the welding rod by irradiating the welding portion with a laser beam.

The X-axis moving unit may include a first bracket spaced apart from the rear of the welding unit, a first screw rotatably mounted on the first bracket in a horizontal direction, a second screw threadably coupled to the first screw, And a first actuating part for moving the first screw, the first nut part being provided in the welding unit, and the first actuating part being for rotating the first screw.

The Y-axis moving unit may include a second bracket vertically provided on the rear side of the welding unit, a second screw provided on one surface of the second bracket in a vertical direction and rotatably provided on the first bracket, A second nut member provided on the second bracket, and a second actuating portion provided on the second bracket and rotating the second screw.

The Z-axis moving unit may include a moving member provided on the first bracket and having a rack on one side thereof, a pinion gear engaged with the rack, and a third motor for rotating the pinion gear desirable.

The welding unit may include a body portion provided with the welding rod, a wire supply reel provided in the vicinity of the body portion and wound with a wire supplied to the welding rod, And a flux supply unit for supplying the flux.

The flux supply unit may include a flux storage passage through which the flux is stored, a flux supply pipe for supplying the flux of the flux storage container to the welding portion, a shutoff valve for shutting off the supply of the flux of the flux storage container, And a flux recovering unit for recovering the flux that has been removed.

The welding unit holding means includes a vertical frame disposed perpendicularly to the paper surface, a horizontal frame installed horizontally in the vertical frame and raised and raised, a horizontal frame provided with the welding unit position adjusting means, And a lifting unit provided on the frame for lifting and lowering the horizontal frame.

According to the present invention, since the welding unit is movable in the three axial directions, that is, in the X, Y, and Z directions with respect to the elbow weld portion to be worked, an accurate welding work can be performed.

In addition, since the table on which the elbows are fixed is rotated, the welding operation of the curved surface portion can be performed quickly.

Further, by providing a laser for irradiating the center line of the welded portion with the laser beam, the welding position setting work of the welding unit can be facilitated.

1 is a perspective view showing an elbow welding apparatus according to an embodiment of the present invention;
2 is a side view showing the elbow mounting jig in the welding apparatus of FIG.
3 is a side view showing the operating state of Fig.
FIG. 4 is a rear view showing a table provided with a rotating means for rotating the table in the elbow mounting jig of FIG. 2;
Fig. 5 shows elbow mounting means in the elbow mounting jig of Fig. 2; Fig.
Figure 6 shows the elbow support means in the elbow mounting jig of Figure 2;
Figure 7 shows a welding unit in the welding apparatus of Figure 1;
Fig. 8 is a side view showing a welding unit having welding electrode positioning means for moving the welding unit of Fig. 7 in the X, Y, and Z axial directions;
Fig. 9 shows the X-axis moving part of the welding unit position adjusting means in the welding unit of Fig. 8; Fig.
10 shows the Y-axis moving part of the welding unit position adjusting means in the welding unit of Fig. 8; Fig.
11 shows the Z-axis moving part of the welding unit position adjusting means in the welding unit of Fig. 8; Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are terms defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is a side view showing an elbow welding apparatus according to an embodiment of the present invention, FIG. 2 is a side view showing an elbow mounting jig in the welding apparatus of FIG. 1, and FIG. 3 is a side view showing the operating state of FIG. FIG. 4 is a rear view showing a table provided with a rotating means for rotating the table in the elbow mounting jig of FIG. 2, FIG. 5 is a view showing the elbow mounting means in the elbow mounting jig of FIG. 2, In which the elbow support means is shown in the elbow mounting jig of FIG. Fig. 7 is a view showing a welding unit in the welding apparatus of Fig. 1, and Fig. 8 is a side view showing a welding unit having welding electrode positioning means for moving the welding unit of Fig. 7 in the X, Y and Z axial directions. FIG. 9 is a view showing the X-axis moving unit of the welding unit position adjusting means in the welding unit of FIG. 8, and FIG. 10 is a view showing the Y-axis moving unit of the welding unit position adjusting unit in the welding unit of FIG. 11 is a view showing the Z-axis moving unit of the welding unit position adjusting means in the welding unit of FIG.

As shown, a workpiece welding apparatus 100 having a curve according to an embodiment of the present invention includes an elbow-mounting jig 200, a welding unit 300, a welding unit support means 400, Adjustment means 500, and a control unit.

First, the elbow 110 in the welding apparatus 100 according to an embodiment of the present invention refers to a tubular member having a curved shape, and its size and diameter are not limited.

Here, the elbow 110 is formed by forming a pair of curved members as described in the above-mentioned background technique, and then pressing the concave portions of the curved members against each other, pressing the edges of the curved members against each other, . At both ends of the elbow 110, that is, at both ends of the welding portion 111, an end tab 120 is formed which performs a soft soldering so as to have a stabilization time of 2 to 3 seconds in which the ends of the welding electrodes are preheated during the welding operation. It is preferable that the end tab 120 is formed to have a length of about 100-150 mm.

The elbow mounting jig 200 is provided to mount an elbow 110 as an object to be welded so that the welding portion 111 of the elbow 110 faces upward when welding is performed. (220), elbow support means (230), rotating means (240), tilting means (250) and a table support member (260).

The table 210 is for temporarily fixing the elbow 110, which is an object to be welded, and has a plurality of fastening grooves 211 for fastening the elbow mounting means 220 to the upper surface thereof. The plurality of coupling grooves 211 may be formed at regular intervals so as to fix the elbows 110 having various sizes. And the table 210 is configured to be rotated by the rotating means 240 described later. The table 210 is configured to be vertically erected after being rotated about its one side by the tilting means 250 described later.

The elbow mounting means 220 is for mounting the elbow 110 on the table 210 and includes a pressing member 221 for pressing the inner circumferential surfaces of both ends of the elbow 110 toward the upper surface of the table 210, And a fastening member 222 threaded through the fastening groove 221 of the table 210 and screwed into the fastening groove 211 of the table 210.

That is, when the pressing member 221 is mounted on the inner circumferential surfaces of both ends of the elbow 110 on the table 210, the fastening member 222 passes through the pressing member 221 and is inserted into the fastening groove 211 of the table 210, So that the elbow 110 is mounted on the table 210.

The elbow support means 230 may be configured such that when the table 210 is in a vertical position for welding the elbow 110 the elbow mounting means 220 is broken and the elbow 110 falls from the table 210 A connecting member 232, and a length adjusting unit 233, which supports the elbow 110 with respect to the table 210,

The latching member 231 is formed in an annular shape and one end of the latching member 231 is connected to the connecting member 232 so as to be hooked on both ends of the elbow 110.

The connecting member 232 is configured to adjust the length by connecting the engaging member 231 and the length adjusting unit 233 and winding or unwinding the length adjusting unit 233.

The length adjuster 233 includes a rotary member 233a rotatably provided at an edge of the table 210 for winding the connection member 232 and a lever 233b for rotating the rotary member 233a . Here, the rotary member 233a may be configured to be rotatably coupled to the table 210 or connected to a fixing member fixed to the table 210 with a hook.

The rotating unit 240 serves to rotate the table 210 in a state in which the ends of the welding part 111 and the welding rod 311 of the elbow 110 are kept at a constant interval during the welding operation. Here, the distance between the end of the welding rod 311 and the welded portion 111 is preferably 15-20 mm.

The rotating means 240 is engaged with the main gear 241 and the main gear 241 provided on the bottom surface of the table 210 and is smaller than the main gear 241 and fixed to a fixing member 260 And a first motor 243 for rotating the auxiliary gear 242. That is, the table 210 is rotatably provided on the fixing member 260 so that the rotational force of the first motor 243 is transmitted to the table 210 by the auxiliary gear 242 and the main gear 241 .

The tilting means 250 rotates the table 210 vertically and supports the welding portion 111 of the elbow 110 mounted on the table 210 with the supporting member 251 facing upward. A guide portion 252, and an operation member 253.

The support member 251 is hingedly fixed to a frame 270 having one end on the ground. The other end of the support member 251 is guided by the guide hole 252a of the guide member 252 formed on the fixing member 260 to be described later and coupled to move back and forth.

The guide portion 252 includes a guide hole 252a formed by a long hole formed in a predetermined length in a fixing member 260 to be described later and a guide hole 252b penetrating through the guide hole 252a and fixed to the other end of the support member 251 And a guide pin 252b.

The operating member 253 is constituted by a cylinder having a shaft member which reciprocates in operation. In other words, the cylinder is configured such that one end of the cylinder is hinged to the frame 270 and rotated about a hinge-fixed portion during operation. The operation member 253 is hinged to the center of the support member 251 so that the end of the shaft member is hinged to the support member 251 to press the support member 251 to vertically raise the table 210, So that it can support the vertical state.

The fixing member 260 is fixed to the bottom surface of the table 210 and both ends of the fixing member 260 are hingedly fixed to the frame 270 provided on the ground.

In addition, the elbow-mounting jig 200 is further provided with an elbow support member 280. The elbow support member 280 is detachably fastened to the table 210 by bolts and is configured to support the lower outer circumferential surface of the elbow 110. [ When the table 210 is vertically erected and the welding operation is proceeding or the elbow support means 220 is damaged or loosened when the elbow support member 280 is going to proceed, the elbow 110 is lowered from the table 210 .

The welding unit supporting means 400 includes a vertical frame 410, a horizontal frame 420, and a lifting unit 430. The welding unit 300 includes a vertical frame 410, a horizontal frame 420, do.

The vertical frame 410 is disposed perpendicularly to the ground and supports the horizontal frame 420 on which the welding unit 300 is installed is raised and lowered by the elevating unit 430.

The horizontal frame 420 is installed horizontally with respect to the vertical frame 410 and has a weld unit 300 to be described later at one end and a flux recovery unit 340 to be described later at the other end.

The elevating part 430 vertically reciprocates the horizontal frame 420 in the vertical frame 410 and includes a second motor 431, a driving chain 432 and a pair of sprockets 433.

The lifting and lowering portion 430 is configured such that a driving chain 432 is wound around a pair of sprockets 433 vertically and the second motor is connected to one sprocket 433 for rotation, 432 are coupled to the horizontal frame 420. Accordingly, when the sprocket 433 is rotated by the driving of the second motor 431, the elevating part 430 causes the horizontal frame 420 to be moved up and down by the driving chain 432. The elevator 430 is a typical technique, and a detailed description of each constituent element will be omitted.

In the vicinity of the vertical frame 410, there is provided an elevator 700 for an operator to operate the welding unit 300 to carry out a welding operation and to reciprocate up and down. The elevator 700 is generally used in equipment, a manufacturer, and the like, and the detailed description thereof will be omitted.

The welding unit 300 performs a welding operation. As shown in FIG. 7, the welding unit 300 includes a body 310, a wire supply reel 320, a flux supply unit 330, and a control unit.

The body 310 is provided with a welding rod 311 for performing welding in a vertical direction and installed in a welding unit position adjusting means 500 to be described later.

The welding electrode 311 is a part for performing welding while melting the wire 321 supplied from the wire feeding reel 320 and is vertically installed on the body 310 and has its lower end directed downward. The body 310 is reciprocally moved in the X-axis, Y-axis, and Z-axis directions by the welding unit position adjusting means 500 described later.

The wire supply reel 320 is wound on a wire 321 supplied to a welding rod 311 and is provided on an upper portion of the body 310.

The flux supply unit 330 supplies the flux to prevent the welding unit 111 from being quenched or oxidized during welding. The flux supply unit 330 includes a flux reservoir 331 provided near the body 310 and storing the flux- A flux supply pipe 332 for supplying the flux to the welding portion 111 and a shutoff valve 333 for blocking the flux of the flux storage container 331 from being supplied.

The flux supply unit 330 is further provided with a flux recovery unit 340 for sucking the used flux and collecting the flux into the flux storage container 331. The flux recovery unit 340 is configured to drive the motor with the same principle as that of the vacuum cleaner to suck the sand as flux into the suction pipe 341.

The welding unit position adjusting means 500 adjusts the position of the welding rod 311 so that the end of the welding rod 311 is perpendicular to the welding portion 111 at a predetermined distance from the welding portion 111 when the welding rod 311 performs welding 311 in the X-axis, Y-axis, and Z-axis directions.

The welding unit position adjusting means 500 is for reciprocating the body portion 310 in which the welding rod 311 is installed in the left-right direction, the up-down direction and the back-and-forth direction in FIG. 7, Axis moving unit 520, a Z-axis moving unit 530, a laser 540, and an operating unit.

The X axis indicates the direction in which the welding electrode 311 of the body 310 is moved in the lateral direction with respect to the weld 111 of the elbow 110. The Y axis indicates the direction in which the welding rod 311 provided on the body 310, And the Z axis indicates the forward and backward directions in which the welding electrode 311 of the body 310 moves forward or backward with respect to the elbow 110. [

The X-axis moving unit 510 includes a first bracket 511 spaced apart from a rear surface of the body 310 and a first screw 512 rotatably mounted on the first bracket 511, A first nut member 513 which is fixed to a second bracket 521 movably coupling the body 310 and is reciprocally moved by being screwed to the first screw 512, 512) for rotating the first actuating part (514).

The first actuating part 514 is fixed to one end of the first screw 512 and is constituted by an operating handle that can be grasped by a worker. The first actuating part 514 may be configured to connect one end of the first screw 512 to the motor shaft and rotate by driving the motor.

The X axis moving unit 510 moves the load of the body part 310 to the first screw 512 when the body part 310 is moved in the X axis direction along the first screw 512 when the operation lever is rotated, And a first guide portion 515 for reducing the influence on the first nut member 513 and smoothly guiding the movement of the body portion 310 in the X-axis direction.

The first guide portion 515 includes a first moving bracket 515a which is provided on a rear surface of the second bracket 521 and has a through hole formed therein and a second moving bracket 515b which is horizontally fixed to the first bracket 511, Includes a first guide bar 515b.

The Y-axis moving unit 520 includes a second bracket 521 spaced apart from the body 310, a second screw 522 vertically rotatable with respect to the second bracket 521, A second nut member 523 provided on the rear surface of the body 310 and a second actuating part 524 for rotating the second screw 523.

The second actuating part 524 may comprise an actuating handle or motor connected to one end of the second screw 522.

The Y-axis moving unit 520 includes a second guide unit (not shown) provided in the second bracket 521 and the body unit 310 to guide and support the movement of the body unit 310 in the Y- .

The Z-axis moving unit 530 is for moving the welding unit 400 in the forward and backward directions, that is, the Z-axis direction with respect to the elbow 110, and includes a third motor 531, a pinion gear 532, a rack 533a (Not shown).

The third motor 531 generates rotational force and is provided in the horizontal frame 420 provided with the welding unit. The pinion gear 532 is connected to the rotating shaft of the third motor 531 so as to rotate.

The moving member 533 is installed in the Z axis direction, and a rack 533a having a predetermined length meshed with the pinion gear 532 is provided at one side. That is, when the pinion gear 532 is rotated by the third motor 531, the shifting member 533 is reciprocated in the Z-axis direction.

The Z-axis moving unit 530 includes a coupling bracket 534 to which the moving member 533 is coupled and a guide rail 535 that is movably coupled to the coupling bracket 534 and is provided on the first bracket 511, ). That is, the engaging bracket 534 and the guide rail 535 are formed in the LM guide shape so that the worker pushes or pulls the first bracket 511 fixed to the guide rail 535, It controls the movement.

The laser 540 is a part that is coupled to the welding rod 311 and irradiates the laser beam to the welding part 111 of the elbow 110. That is, the laser 540 irradiates the laser beam to the welding portion 111, and serves as a point so that the end of the welding rod 311 can be positioned at the center line of the welding portion 111.

The welding unit position adjusting means 500 may be configured such that the X axis moving unit 510, the X axis moving unit 520 and the Z axis moving unit 530 are connected to the control unit and the welding electrode 311 is replaced with a laser And an infrared ray generator for generating infrared rays, and then the infrared ray generator is connected to the controller.

That is, after the control unit detects the amount of infrared rays irradiated from the infrared ray generating unit and reflected to the welding unit 111, the distance between the welding unit 111 and the welding rod 311 is calculated. Based on the calculated distance, Axis movement unit 520 and the Z-axis movement unit 530 to control the position of the welding electrode 311 automatically.

The operation of the welding apparatus for forming an elbow according to an embodiment of the present invention as described above will be briefly described.

First, the elbow 110, which is an object to be welded and is usable, must be mounted on the table 210.

That is, the operator places the elbow 110 on the table 210, fixes the inner circumferential surfaces at both ends of the elbow 110 with the elbow mounting means 220 of the elbow mounting jig 200, The connecting member 232 for connecting the engaging member 231 by rotating the rotating member 233a of the elbow supporting means 230 by hanging the engaging member 231 of the supporting means 230 at both ends of the elbow 110 is called a straining . Then, the elbow support member 280 is tightly attached to the outer lower portion of the elbow 110, and then the bolts are fastened to the table 210 to complete the operation of mounting the elbow 110 on the table 210.

Thereafter, the operator operates the tilting means 250 to vertically set the table 210 so that the welding portion of the elbow 110 mounted on the table 210 faces upward.

The operator then operates the welding unit support means 400 to move the welding unit 300 to a position higher than the welding portion 111 of the elbow 110 mounted on the table 210. The Z-axis moving unit 530 of the welding unit position adjusting means 500 is operated to move the welding unit 300 to a position where the welding portion 111 of the elbow 110 is located. Thereafter, the laser beam provided to the welding unit 300 is operated so that the laser beam is reflected on the welding portion 111 of the elbow 110. Then, the operator operates the X-axis moving part 510, the Y-axis moving part 520 and the Z-axis moving part 530 to move the welding unit 300 little by little to the lower part of the welding rod 311, The setting of the welding unit 300 is completed by setting the welding rod 311 to a distance of 15 to 20 mm from the welding portion 111. [

Then, the welding unit 300 and the flux supply unit 330 are operated to perform a welding operation.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is understandable. Accordingly, the true scope of the present invention should be determined by the following claims.

100: welding device
110: elbow 111: welded portion
120: End tab
200: Elbow mounting jig 210: Table
211: fastening groove
220: Elbow mounting means 221:
222: fastening member
230: elbow support means 231:
232: connecting member 233:
240: rotating means 241: main gear
242: auxiliary gear 243: first motor
250: tilting means 251: supporting member
252:
260: Fixing member
270: Table frame
280: elbow support member
300: welding unit
310: Body part 311: Electrodes
320: wire feed reel 321: wire
330 flux supplier 331 plug reservoir
332: plug supply pipe 333: shutoff valve
400: welding unit supporting means
410: vertical frame
420: Horizontal frame
430: lift portion 431: second motor
432: drive chain 433: sprocket
500: welding unit position adjusting means
510: X-axis moving part 511: first bracket
512: first screw 513: first nut member
514: first operating portion 515: first guide portion
520: Y-axis moving part 521: second bracket
522: second screw 523: second nut member
524: second operating portion
530: Z-axis moving unit 531: Third motor
532: Pinion 533: Movable member
540: Laser
700: Lift

Claims (13)

An elbow mounting jig for lifting and fixing an elbow as an object to be welded and supporting the welded portion of the elbow in an upward direction;
A welding unit having a welding rod for performing welding with respect to the welding portion of the elbow;
A welding unit supporting means on which the welding unit is installed;
A welding unit position adjusting means provided in the welding unit supporting means for moving the welding unit in the left and right, up and down, and back and forth directions with respect to the welding portion of the elbow to adjust the welding position of the welding electrode;
A control unit for controlling the welding unit and the welding electrode position adjusting means;
Wherein the workpiece has a curved shape.
The method according to claim 1,
The elbow-
A table for raising the elbow,
Mounting means for mounting the elbow to a table,
Support means for supporting the elbow mounted on the table by the mounting means,
Tilting means for vertically erecting the table to perform welding,
Rotating means for rotating the table;
And a welding device for welding a workpiece having a curved shape.
3. The method of claim 2,
The elbow mounting means
A pressing member which is raised over both inner peripheral surfaces of the elbow,
And a fastening member penetrating the pressing member and screwed into a fastening groove formed in the table.
3. The method of claim 2,
The elbow support means comprises:
An engaging member engaged with the inner circumferential surfaces at both ends of the elbow,
A rotary member rotatably provided on the table;
A connecting member having one end connected to the engaging member and the other end partially wound on the rotating member,
A lever for rotating the rotating member;
Wherein the workpiece has a curved shape. 3. The method of claim 2,
Wherein the tilting means comprises:
A supporting member having one end hinged to the ground and the other end movably coupled to the fixing member;
A guide portion for guiding movement of the other end of the support member when the table is vertically erected,
An operating member hinged to the support member and provided on the ground to press the support member;
Wherein the workpiece has a curved shape.
3. The method of claim 2,
The rotating means
A main gear provided on a bottom surface of the table,
An auxiliary gear provided on the fixed member and engaged with the main gear,
A first motor for generating a rotational force for rotating the auxiliary gear;
Wherein the workpiece has a curved shape.
The method according to claim 1,
Wherein the welding unit position adjustment means comprises:
An X-axis moving unit for reciprocating the welding unit in the left-right direction (X-axis) with respect to the welded portion of the elbow,
A Y-axis moving unit for reciprocating the welding unit in the vertical direction (Y-axis direction) above the welding portion of the elbow,
A Z-axis moving unit for reciprocating the welding unit in the front-rear direction (Z-axis direction) with respect to the elbow,
An operation unit for allowing the operator to operate the X-axis moving unit, the Y-axis moving unit, and the Z-
A laser provided in the welding unit, the laser being a guide for adjusting a position of the welding rod by irradiating the welding portion with a laser beam;
Wherein the workpiece has a curved shape.
8. The method of claim 7,
The X-
A first bracket spaced apart from the rear of the welding unit,
A first screw rotatably installed on the first bracket in a horizontal direction,
A first nut member which is threadedly coupled to the first screw and is reciprocated,
A first actuating part for rotating the first screw;
Wherein the workpiece has a curved shape.
8. The method of claim 7,
The Y-
A second bracket vertically provided at the rear of the welding unit,
A second screw provided on one surface of the second bracket in a vertical direction,
A second nut member that is screwed to the second screw and reciprocates, and is provided on the second bracket;
A second actuating part provided on the second bracket for rotating the second screw;
Wherein the workpiece has a curved shape.
9. The method according to claim 7 or 8,
The Z-
A moving member provided on the first bracket and having a rack on one side thereof,
A pinion gear engaged with the rack,
A third motor for rotating the pinion gear;
Wherein the workpiece has a curved shape.
The method according to claim 1,
The welding unit includes:
A body portion having the electrode,
A wire feeding reel provided in the vicinity of the body portion and wound with a wire supplied to the electrode,
A flux supplier for supplying a flux for preventing the weld portion from being quenched and oxidized at the time of welding;
Wherein the workpiece has a curved shape.
12. The method of claim 11,
The flux supply unit includes:
A flux storage pass through which the flux is stored,
A flux supply pipe for supplying the flux of the flux storage vessel to the weld,
A shutoff valve for shutting off supply of the flux of the flux storage vessel,
A flux recovery unit for recovering the flux supplied to the welding unit;
Wherein the workpiece has a curved shape.
The method according to claim 1,
The welding unit support means includes:
A vertical frame disposed perpendicularly to the ground,
A horizontal frame installed horizontally in the vertical frame and installed to move up and down,
A lifting unit provided on the vertical frame for lifting the horizontal frame;
Wherein the workpiece has a curved shape.

Images