KR102289311B1 - T-bar welding carriage for ship and t-bar manufacturing method using the same - Google Patents

Abstract

The present invention relates to a T-bar welding carriage for ships for manufacturing a T-bar by welding a web plate to a flange plate, comprising: a rail part installed on the web plate; It is movably installed in the rail part and includes a welding part for welding an area in contact with the flange plate and the web plate, wherein the welding part simultaneously welds the area in contact with the web plate to the flange plate from both sides. do.

Description

T-bar welding carriage for ship and method for manufacturing T-bar for ship using same

The present invention relates to a T-bar welding carriage for a vessel and a method for manufacturing a T-bar for a vessel using the same, and more particularly, to minimize welding deformation of a welding object during a welding operation for manufacturing a T-bar used for a vessel, and then It relates to a T-bar welding carriage for ships capable of maximizing the efficiency of the weaving work performed, and a method for manufacturing a T-bar for ships using the same.

High manganese steel and stainless steel are austenitic steels and have excellent mechanical properties at cryogenic temperatures (-163℃), so they are applied to the fuel tank structure of LNG fueled ships. However, the manufacturability of the structure is inferior to that of carbon steel.

In general, high manganese steel and stainless steel have a smaller coefficient of thermal diffusion than carbon steel and a larger coefficient of thermal expansion, which is a mechanical property, so that welding deformation (bending) occurs 2 to 3 times when the same heat is input. That is, it can be seen that the welding deformation characteristics for the heat source are larger and more sensitive than that of carbon steel. In particular, a large amount of welding deformation occurs in the small member stage (eg, T-bar) in which the peripheral restraint is relatively weak.

Carbon steel T-bar is automated so that it can be welded very quickly with tandem 2 pole double-sided welding, but automated welding equipment considering the material properties of high manganese steel and stainless steel has not been developed.

Conventional welding of a web plate and a flange plate of a T-bar made of high manganese steel or stainless steel is performed on both sides of the T-bar by semi-automatic welding (FCAW). A pair of welding carriages installed on either side of the machine are each controlled by at least two operators.

However, in the case of a T-bar applied to the fuel tank structure of a ship using liquefied gas as fuel (for example, an LNG fueled ship), the length is about 10m, and the width when the fillet welding on both sides does not proceed continuously. The lateral bending phenomenon can occur greatly, and the productivity is lowered due to the difficult welding operation, such as the occurrence of pores in the welding area due to the speed difference between the welding carriages on both sides.

In addition, due to the low thermal diffusion coefficient of high manganese steel or stainless steel, deformation occurs after the welding operation (about 40 minutes) is completed. This is a universal T-bar manufacturing technique.

However, when the amount of lateral bending in the width direction is large, it is difficult to straighten it with mechanical bending, so each operator corrects the lateral bending in the width direction by simultaneously heating the upper and both sides of the web plate using a heating torch. When the heating weaving operation is performed once, as much time as the welding operation time is consumed, in general, since this heating bending operation is performed a plurality of times, the productivity thereof may be reduced.

In addition, even when the amount of longitudinal bending in the longitudinal direction is large, the number of weaving machines increases, resulting in an increase in working time, so an improvement measure is required.

The above-described technical configuration is a background for helping the understanding of the present invention, and does not mean a conventional technique widely known in the art to which the present invention pertains.

Korea Patent Publication No. 10-0869230 (Korea Gas Corporation) 2008. 11. 12.

The technical problem to be achieved by the present invention is a T-bar welding carriage for ships that can minimize the welding deformation of the welding object during the welding operation for manufacturing the T-bar used in the ship, and maximize the efficiency of the bending work due to the welding deformation And to provide a method for manufacturing a T-bar for a ship using the same.

According to one aspect of the present invention, there is provided a T-bar welding carriage for ships for manufacturing a T-bar by welding a web plate to a flange plate, comprising: a rail part installed on the web plate; A T-bar welding carriage for ships that is movably installed on the rail and includes a welding part for welding an area in which the flange plate and the web plate are in contact may be provided.

The welding unit may simultaneously weld an area in which the web plate is in contact with the flange plate from both sides.

In addition, the rail portion guide rail for guiding the sliding movement of the welding portion on the upper portion of the web plate; and one or more fixing blocks provided at a lower portion of the guide rail and fixing the guide rail to an upper portion of the web plate.

In addition, the welding portion is a first body portion slidably coupled to the guide rail; a pair of coupling blocks provided to face each other on both sides of the first body part; a height adjustment member movably coupled to each of the pair of coupling blocks; and a pair of welding torches that are rotatably coupled to the height adjustment member to weld an area in which the flange plate and the web plate are in contact.

In addition, the pair of welding torches may be positioned so as to be inclined at 45 degrees from the center of the width direction of the flange plate to both sides of the web plate.

In addition, it may further include a heating unit movably installed in the rail unit to heat the flange plate or the web plate.

In addition, the heating unit includes a second body portion slidably coupled to the guide rail; and a pair of heating torches provided in the second body part to heat both upper and opposite sides of the web plate when the welding part operates.

In addition, the pair of heating torches may be provided with a plurality of gas nozzles spaced apart in a height direction of the pair of heating torches.

In addition, further comprising a control unit provided on at least one of the welding unit and the heating unit, wherein the control unit stops the operation of the other welding torches when the operation of any one of the pair of welding torches is stopped as well as the operation of the other welding torches, The movement of the welding part may also be controlled to stop.

In addition, the flange plate and the web plate are provided with low-temperature steel including high manganese steel or stainless steel, and the T-bar may be applied to a fuel tank of a ship using liquefied gas as a fuel.

According to another aspect of the present invention, there is provided a method of manufacturing a T-bar for a ship for manufacturing a T-bar by welding a web plate to a flange plate, a rail unit is installed on the web plate, and a welding unit is provided to move the rail unit. preparing a T-bar welding carriage for ships by installing; and operating the welding part to weld a region where the flange plate and the web plate come into contact with each other.

In the welding of the area in which the flange plate and the web plate are in contact, the welding unit may simultaneously weld the area in which the web plate is in contact with the flange plate from both sides.

In addition, the step of preparing the T-bar welding carriage for the vessel further comprises the step of installing a heating part to be movable on the rail, and after welding the area where the flange plate and the web plate are in contact, the heating part It may further include the step of heating the upper both sides of the web plate by operating.

In addition, the step of heating the upper both sides of the web plate may be performed a plurality of times according to the longitudinal bending amount of the web plate.

In the present invention, since the welding part is provided to be movable in the rail part, it is possible to easily perform a continuous welding operation along the rail part and to perform a uniform welding operation, thereby reducing the amount of lateral bending in the width direction due to welding.

In addition, since the welding part can simultaneously weld the area where the web plate is in contact with the flange plate from both sides, it is possible to prevent the occurrence of pores in the welding part due to the speed difference.

In addition, it can have a one-time curvature effect by heating together during the welding operation, including the heating unit provided to be movable in the rail unit together with the welding unit.

Furthermore, when the heating work after welding is completed, it is possible to use the welding carriage of the present invention to increase the accuracy of the weaving work, thereby maximizing the efficiency of the weaving work.

1 is a view schematically showing that a T-bar welding carriage for a ship according to an embodiment of the present invention is provided on the T-bar.
FIG. 2 is a view showing an area of the welding part shown in FIG. 1 .
3 is a schematic front view of FIG. 2 ;
4 is a view showing the results of a transverse bending test in the width direction after welding and heating of a T-bar made of high manganese steel.
5 is a view showing the longitudinal longitudinal bending test results after welding and heating of Case 125-25.
6 is a view showing the longitudinal longitudinal bending test results after welding and heating of Case 125-10.
7 is a view showing the longitudinal bending test results after welding and heating of Case 150-25.

In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings illustrating preferred embodiments of the present invention and the contents described in the accompanying drawings.

Hereinafter, the present invention will be described in detail by describing preferred embodiments of the present invention with reference to the accompanying drawings. Like reference numerals in each figure indicate like elements.

1 is a view schematically showing that a T-bar welding carriage for a ship according to an embodiment of the present invention is provided on a T-bar, FIG. 2 is a view showing an area of the welding part shown in FIG. 1, FIG. 3 is It is a schematic front view of FIG.

As shown in these figures, the T-bar welding carriage for ships according to an embodiment of the present invention is a T-bar for ships for manufacturing the T-bar 10 by welding the web plate 12 to the flange plate 11 . - As a bar welding carriage 100, the rail portion 110 provided on the web plate 12, and is movably installed on the rail portion 110, the flange plate 11 and the web plate 12 is in contact A welding unit 130 for welding the region, and a heating unit 150 movably installed on the rail unit 110 to heat the flange plate 11 or the web plate 12 are provided.

The rail unit 110 is a welding object provided by welding the flange plate 11 and the web plate 12 to each other, for example, a web plate of the T-bar 10 , as shown in FIGS. 1 to 3 . It may be provided at 12 to guide the movement of the welding part 130 and the heating part 150 .

The T-bar 10 to which this embodiment is applied is made of low-temperature molten steel, for example, high manganese steel (HMn) or stainless steel, which is a non-magnetic material, so the welding part 130 And it is very difficult to travel on the wall of the heating unit 150 . In this embodiment, by providing the rail part 110 in consideration of this, the movement of the welding part 130 and the heating part 150, that is, the longitudinal movement of the T-bar 10 can be guided.

The rail unit 110 of this embodiment, as shown in FIG. 2 , a guide rail 111 provided on the web plate 12 to guide the sliding movement of the welding unit 130 and the heating unit 150 , and, It is coupled to the lower portion of the guide rail 111 and includes a fixing block 113 for fixing the guide rail 111 to the upper portion of the web plate (12).

The guide rail 111 may be fitted and coupled to a lower portion of the welding portion 130 and a lower portion of the heating portion 150 to be slidably moved, which will be described later. Alternatively, a plurality of rollers may be provided under the welding unit 130 and the heating unit 150 , and the guide rail 12 may support the plurality of rollers provided in the welding unit 130 and the heating unit 150 to be rotatable. there is.

A concave portion may be formed on the bottom surface of the fixing block 113 so that the upper end of the web plate 12 is inserted, as shown in FIG. 3 . In this case, the fixing block 113 may be detachably coupled to the web plate 12 using a bolt member.

For example, after providing threaded holes for inserting the bolt members 113a on both sides of the fixing block 113 , insert the bolt members 113a into the threaded holes to press the web plate 12 . (12) can be combined. It may be preferable that a plurality of fixing blocks 113 of this embodiment are provided at regular intervals along the longitudinal direction of the web plate 12 .

As shown in FIG. 2 , the welding part 130 may be provided on the rail part 110 to weld an area in which the flange plate 11 and the web plate 12 contact each other. Preferably, the welding portion 130 may be provided to simultaneously weld the area in which the web plate 12 is in contact with the flange plate 11 from both sides.

Specifically, as shown in FIG. 2 , the welding part 130 includes a first body part 131 that is slidably coupled to the guide rail 12 , and a pair provided on the first body part 131 . of the coupling block 133, the guide bar 135 coupled to the pair of coupling blocks 133 to be movable in the vertical direction, and the flange plate 11 and rotatably coupled to the end of the guide bar 135 The web plate 12 includes a pair of welding torches 137 for welding the abutting area.

The T-bar welding carriage 100 for ships according to an embodiment of the present invention is a welding part 130 including a pair of welding torches 137 is slidably coupled to the guide rail 12, so that a pair of It is possible to prevent the speed difference of the welding torch 137 and to reduce the possibility of the occurrence of voids in the welding sites on both sides of the T-bar 10 .

A concave portion for accommodating the guide rail 111 may be formed on the lower surface of the first body portion 131 , as shown in FIG. 3 . At this time, at least one fastening member 131a is through-coupled to one side of the first body 131, and the first body 131 is stably coupled to the guide rail 12 by the fastening member 21a. can

The coupling block 133 is provided to face each other with the first body portion 131 interposed therebetween, as shown in FIG. 3 , and each coupling block 133 has vertical movement from the coupling block 133 A height adjustment member 135 coupled thereto may be provided.

The height adjustment member 135 is for adjusting the height of the welding torch 137 to be described later, and the height adjustment member 135 of this embodiment has a bar shape and is coupled to be movable up and down from the coupling block 133 . However, the position may be fixed to the coupling block 133 by a separate fastening member (133a) formed in the coupling block (133).

That is, the height adjusting member 135 is screwed to the coupling block 133 by a separate fastening member 133a, and the height adjusting member 135 for the coupling block 133 by loosening or tightening the fastening member 133a. ) can be adjusted in height.

A pair of welding torches 137 may be rotatably coupled to an end of the height adjustment member 135 . In other words, the welding torch 137 is rotatably coupled to the end of the height adjusting member 135 , it may be fixed by a separate fastening member 135a formed at the end of the height adjusting member 135 .

At this time, the pair of welding torches 137 may be fixed to be inclined at a predetermined angle from the height adjustment member 135 so that the ends thereof may be provided to face the center of the width direction of the flange plate 11 . In other words, a pair of welding torches 137, as shown in FIG. 3, are fixed to be inclined at 45 degrees from the center of the width direction of the flange plate 11 to both sides of the web plate 12, respectively, and the flange plate 11 ) and the area in which the web plate 12 is in contact can be welded.

The T-bar welding carriage 100 for ships according to an embodiment of the present invention is positioned so that a pair of welding torches 137 can maintain a predetermined height and angle on the first body 131 so as to maintain precision during welding operation. can be improved.

In addition, the first body portion 131 is movably formed on the guide rail 111 to prevent the speed difference between the pair of welding torches 137 and to reduce the possibility of pore generation in the welding parts on both sides of the T-bar 10 . can

On the other hand, in the present embodiment, the first body portion 131 of the welding portion 130, a separate handle 139 for the operator may be provided. The handle 139 may be welded or bolted to the first body 131 . Referring to FIGS. 2 to 3 , a handle 139 in the shape of an 'L' is shown on the first body portion 131, but the present invention is not limited thereto.

As shown in FIG. 1 , the heating unit 150 is connected to the welding unit 130 and can be moved like the welding unit 130 , and operates like the welding unit 130 to heat the web plate 12 . - It is possible to reduce the amount of longitudinal bending of the bar (10).

When the area in which the web plate 12 is in contact with the flange plate 11 is referred to as one end of the web plate 12 , the heating unit 150 may be formed to heat both sides of the other end of the web plate 12 . . This is to attenuate the amount of longitudinal bending caused by welding, and it is possible to reduce deformation while generating a bending force in a direction opposite to the longitudinal bending direction generated by welding.

As shown in FIG. 1 , the heating unit 150 includes a second body unit 151 movably connected to the rail unit 110 in the same manner as the first body unit 131 of the welding unit 130 , A heating torch 153 provided on both sides of the second body 151 to heat the web plate 12 is included.

The second body portion 151 may be coupled to the guide rail 12 in the same manner as the above-described first body portion 131 and move in the longitudinal direction of the guide rail 12 together with the welding portion 130 .

In this embodiment, the heating unit 150 is connected to the welding unit 130 by a separate connecting rod (not shown) and may be provided to enable simultaneous control by one operator, but the present invention is not limited thereto. , the heating unit 150 may be provided to be separated from the welding unit 130 to be movable along the longitudinal direction of the guide rail 12 .

As shown in FIG. 1 , the heating torch 153 of the heating unit 150 may be provided with a plurality of gas nozzles 153a to heat the upper end of the web plate 12 or both sides of the upper web plate 12 .

In this embodiment, the plurality of gas nozzles 153a may be provided at regular intervals in the height direction of the heating torch 153 . Preferably, it is provided to simultaneously heat the upper both sides of the web plate 12 .

Meanwhile, the T-bar welding carriage 100 for ships according to an embodiment of the present invention may further include a control unit (not shown) for controlling the operation of the welding unit 130 . When the operation of any one of the welding torches 137 of the pair of welding torches 137 stops, the control unit controls to stop the operation of the other welding torches 137 as well as controls to stop the movement of the welding part 130 can do.

The heating unit 150 may also be provided with a separate control unit in the same manner as the welding unit 130 , and when the welding unit 130 and the heating unit 150 are moved together, the welding unit 130 and the heating unit are heated by one control unit. The operation of the unit 150 may be controlled.

The T-bar welding carriage 100 for ships according to an embodiment of the present invention can maintain the continuity of both fillet welding by the control unit, and can reduce the transverse bending phenomenon in the width direction.

Whereas in the prior art, heating is performed over the first and second rounds after the welding operation, in this embodiment, the primary heating is possible during the welding operation, so that it is possible to shorten the working time as well as to improve the effect of the curved weaving during the secondary heating. can be maximized. This will be explained in detail through the experimental results to be described later.

In the process of the present invention, the applicant divided into 5 cases for a high manganese steel T-bar with a length of 10 m and conducted lateral bending and longitudinal bending tests in the width direction due to welding and heating, and each case condition was [ Table 1].

Case definition section
(Ww*Wt+Fw*Ft) length restraint constraint interval Case 125 300*12+125*15 10000mm X X Case 125-25 300*12+125*15 10000mm O 2500mm Case 125-10 300*12+125*15 10000mm O 1000mm Case 150 300*12+150*15 10000mm X X Case 150-15 300*12+150*15 10000mm O 2500mm

4 is a view showing the test results of transverse bending in the width direction after welding and heating of a T-bar made of high manganese steel.

4 shows the results of transverse bending in the width direction after the first and second bending after welding for the entire case of Table 1, in FIG. 4, 'Web' means a web plate, and 'Flange' is a flange plate means In addition, 'Web Top' means heating the top surface of the web plate, and 'Web Side' means heating the upper both sides of the web plate.

Referring to FIG. 4 , it can be seen that when the width of the flange plate is 125 mm, the amount of longitudinal bending in the width direction after welding is relatively large compared to the case where the width of the flange plate is 150 mm.

In the above experiment, in case 125 (Case125), the welding carriage on the right side of the welding part stopped 4 times, and in case 125-25 (Case125-25), the welding carriage on the left side stopped once. For this reason, it is determined that the case 125 and the case 125-25 are subjected to lateral bending in the width direction.

On the other hand, during the initial cutting operation, when the width of the flange plate was 125 mm, there was an average initial deformation of 7 mm, and when the width of the flange plate was 150 mm, there was an average initial deformation of 2 mm. In Case 125-25, the initial deformation of the flange plate before restraint It is judged that the lateral bending in the width direction is weighted while unwinding.

In addition, when the width of the flange plate was 125 mm, the amount of transverse bending in the width direction due to the weaving (ie, heating) was larger, which is thought to be due to the difference in initial deformation after welding and the difference in stiffness in the width direction. In case of case 125-25, the deformation was larger due to excessive heating of the side of the flange plate.

That is, through the above experiment, it can be interpreted that if the width direction stiffness of the flange plate is small or if face welding is not continuously performed, the amount of transverse bending in the width direction is greatly increased.

5 to 7 are graphs showing results of longitudinal bending experiments after welding and heating of a high manganese steel T-bar having a length of 10 m.

Figure 5 shows that the flange plate width is 125 mm, and after welding is performed in a state where the restraining interval is 2500 mm (Case 125-25 in Table 1), the side part of the web plate is heated (first curved), and secondly, the upper part of the web plate It is a graph showing the change in longitudinal bending amount after heating (secondary curved weaving).

Referring to FIG. 5 , the maximum deformation amount after welding and the first and second curving decreases in the order of 58mm, 46mm, and 8mm, and it can be seen that the effect of the second curving (heating the upper end of the web plate) is high.

6 shows a flange plate width of 125 mm and a constraint interval of 1000 mm (Case 125-10 in Table 1) after welding is performed, and then firstly heating the side part of the web plate (first curvature), and secondly, the upper part of the web plate It is a graph showing the change in longitudinal bending amount after heating (secondary curved weaving).

Referring to FIG. 6 , it can be seen that the maximum deformation amount after welding and the first and second bending decreases in the order of 51mm, 45mm, and 10mm, and the effect of heating the upper end of the secondary web plate is the same as the result derived in FIG. 5 It can be seen that is high

7 shows the flange plate width is 150 mm and the upper part of the web plate is firstly heated (first curved) after welding is performed in a state where the restraining interval is 2500 mm (Case 150-25 in Table 1), and secondly, the side part of the web plate It is a graph showing the change in longitudinal bending amount after heating (secondary curved weaving).

Referring to FIG. 7 , the maximum deformation amount decreased in the order of 47 mm, 29 mm, and 5 mm, and results similar to the graphs shown in FIGS. 5 to 6 were obtained. That is, it can be seen that the effect of the secondary grain weaving is high.

Case 150-25 had a difference in the primary and secondary heating positions compared to Case 125-25 or Case 125-10, but the same as in the previous experiment, the maximum deformation amount was significantly reduced in the secondary curved weave than in the primary curved weave. .

That is, the effect of the texture can be interpreted as that the effect by the overlap (secondary) is greater than the effect at a specific location.

Through the above experiment, it is determined that it is difficult to correct the welding deformation with only one bending in the bending work due to the welding deformation after welding the high manganese steel, and it is determined that the correction effect can be increased through the bending operation twice or more.

In the present invention, since the welding part is provided to be movable in the rail part, continuous welding operation along the rail part is easy and uniform welding operation is possible, so that it is possible to reduce the amount of lateral bending in the width direction due to welding.

In addition, since the welding part can simultaneously weld the area in which the web plate is in contact with the flange plate from both sides, it is possible to prevent the occurrence of pores in the welding part due to the speed difference.

In addition, it can have a one-time curvature effect by heating together during the welding operation, including the heating unit provided to be movable in the rail unit together with the welding unit.

Furthermore, when the heating weaving work after welding is completed, it is possible to use the welding carriage of the present invention to increase the accuracy of the weaving work, thereby maximizing the efficiency of the weaving work.

Hereinafter, a method of manufacturing a T-bar for a vessel using a T-bar welding carriage for a vessel according to an embodiment of the present invention will be briefly described.

The ship T-bar manufacturing method using the marine T-bar welding carriage 100 of this embodiment is a marine T-bar for manufacturing the T-bar 10 by welding the web plate 12 to the flange plate 11 . As a manufacturing method of the web plate 12, a rail unit 110 is installed on the upper portion, and a welding unit 130 and a heating unit 150 are installed to be movable on the rail unit 110 to install a T-bar welding carriage for ships. Preparing, operating the welding part 130 to weld the area where the flange plate 11 and the web plate 12 come into contact, and operating the heating part 150 to heat the upper both sides of the web plate 12 including the step of making

The welding part 130 may simultaneously weld the area in which the web plate 12 is in contact with the flange plate 11 from both sides.

In the present embodiment, the step of heating the upper both sides of the web plate 12 may be performed a plurality of times according to the longitudinal bending amount of the web plate 12 .

Then, by using the heating unit 150 to heat the web plate 12 may further include the step of performing additional weaving work.

As such, the present invention is not limited to the described embodiments, and it is apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the present invention. Accordingly, it should be said that such modifications or variations are included in the claims of the present invention.

100: welding carriage 110: rail part
111: guide rail 113: fixed block
130: welding part 131: first body part
133: coupling block 135: height adjustment member
137: welding torch 139: handle
150: heating part 151: second body part
153: heating torch 155: gas nozzle

Claims (12)

A T-bar welding carriage for ships for manufacturing a T-bar by welding a web plate to a flange plate, comprising:
a rail part installed on the web plate;
It is movably installed in the rail portion and includes a welding portion for welding the area in contact with the flange plate and the web plate,
The welding portion simultaneously welds the area in contact with the web plate to the flange plate from both sides,
The rail unit,
a guide rail for guiding the sliding movement of the welding part on the upper part of the web plate; and
At least one fixing block provided on the lower portion of the guide rail and fixing the guide rail to the upper portion of the web plate,
T-bar welding carriage for ships that is movably installed in the rail unit further comprising a heating unit for heating the flange plate or the web plate. delete The method of claim 1,
The welding part,
a first body portion slidably coupled to the guide rail;
a pair of coupling blocks provided to face each other on both sides of the first body part;
a height adjustment member movably coupled to each of the pair of coupling blocks; and
T-bar welding carriage for ships including a pair of welding torches rotatably coupled to the height adjustment member for welding the area in contact with the flange plate and the web plate. The method of claim 1,
The pair of welding torches is a T-bar welding carriage for ships in which the position is fixed so as to be inclined at 45 degrees from the center of the width direction of the flange plate to both sides of the web plate. delete The method of claim 1,
The heating unit,
a second body portion slidably coupled to the guide rail; and
T-bar welding carriage for ships including a pair of heating torches provided in the second body portion for heating the upper both sides of the web plate when the welding portion is operated. 7. The method of claim 6,
The pair of heating torches has a plurality of gas nozzles spaced apart from each other in a height direction of the pair of heating torches. T-bar welding carriage for ships. The method of claim 1,
Further comprising a control unit provided on at least one of the welding unit and the heating unit,
When the control unit stops the operation of any one of the welding torches of the pair of welding torches, the operation of the other welding torches is also stopped, and the T-bar welding carriage for ships controls to stop the movement of the welding part as well. The method of claim 1,
The flange plate and the web plate are provided with low-temperature steel including high manganese steel or stainless steel,
The T-bar is a T-bar welding carriage for ships applied to a fuel tank of a ship using liquefied gas as fuel. A method of manufacturing a T-bar for a vessel for manufacturing a T-bar by welding a web plate to a flange plate, the method comprising:
Preparing a T-bar welding carriage for ships by installing a rail part on the web plate and installing a welding part to be movable on the rail part; and
operating the welding part to weld an area in which the flange plate and the web plate come into contact,
In the step of welding the area in contact with the flange plate and the web plate,
The welding portion simultaneously welds the area in contact with the web plate to the flange plate from both sides,
In the step of preparing the T-bar welding carriage for the vessel, further comprising the step of installing a heating unit to be movable in the rail unit,
After the welding of the area in which the flange plate and the web plate contact each other, operating the heating unit to heat the upper both sides of the web plate. delete 11. The method of claim 10,
The step of heating the upper both sides of the web plate is a T-bar manufacturing method for ships that is performed a plurality of times according to the longitudinal bending amount of the web plate.

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