JP2001300773A - Metallic plate supporting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a metallic plate supporting device with which a backing strip is supported from the side of a face to be welded and the positioning of metallic plates whose one side is to be butt-welded is performed from the side of the face to be welded. SOLUTION: The metallic plates 1 and 2 are positioned from the side of the face to be welded in a way that a bolt 25 for fixing the backing strip inserted through a second supporting body 22 is engaged with the backing strip 23 located on the reverse side of the face to be welded of the metallic plates 1 and 2, the backing strip 23 is supported from the side of the face to be welded, and the front end of an adjusting bolt 26 engaged with the second supporting body 22 is butted with the metallic plates 1 and 2 in a state that a first supporting body 21 arranged on the reverse side of the face to be welded of the metallic plates 1 and 2 whose one side is to be butt-welded and the second supporting body 22 arranged on the side of the face to be welded of the metallic plates 1 and 2 are mutually fastened with a bolt 24 for fastening the supporting bodies.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal plate supporting device used for butt single side welding.

[0002]

2. Description of the Related Art FIG. 5 shows an example of a conventional metal plate supporting device. This metal plate supporting device is used to form a groove between metal plates (stainless steel plates) 1 and 2 to be joined to each other by butt single-side welding. Square rod-shaped backing material (backing copper plate) 3 covering from the anti-welding work surface side, and a notch 4 fitted to the backing material 3 at one edge
a, and a notch 5a which is loosely fitted to the backing material 3 at one edge and has a notch 5a , 2 and a strong back key plate 5 fitted in a key nut 7 attached to the anti-welding work surface, and a wedge-shaped member 6 inserted between the strong back key plate 5 and the key nut 7.
And a dove plate 8 that is temporarily welded to the end faces of the metal plates 1 and 2.

On the surface of the backing material 3 facing the metal plates 1 and 2, a groove 3 is formed which extends vertically along the groove of the metal plates 1 and 2.
a is formed, and a metal plate 1
A groove 8a is formed so as to be continuous with the groove portion 2 of FIG.

When performing one-sided butt welding using the above-described metal plate supporting apparatus, a strong back key plate 5 and a key nut 7 are attached to the non-welding work surfaces of the metal plates 1 and 2 to be welded to each other. After inserting the wedge-shaped member 6 between the strong back key plate 5 and the key nut 7, the insertion amount of the wedge-shaped member 6 is adjusted so that the two metal plates 1 and 2 can be aligned in the thickness direction and the metal plates 1 and 2 so that no misalignment occurs. Adjust the relative position in the plate width direction.

Next, a restraint plate 4 is attached to the anti-welding work surface of the metal plates 1 and 2 to restrain the displacement and the angle change of the two metal plates 1 and 2 in the width direction, and Attach dove plate 8 to

In this state, argon gas is continuously supplied to the gap between the groove 3a of the backing material 3 and the metal plates 1 and 2 so that the gap is maintained in an inert gas atmosphere. TIG welding is performed on the groove portions of the metal plates 1 and 2 from the welding work surface side where the material 3 is not arranged.

After the TIG welding of the metal plates 1 and 2 is completed,
The restraint plate 4, the strong back key plate 5, the wedge-shaped member 6, the key nut 7, and the dove plate 8 attached to the metal plates 1 and 2 are removed.

FIG. 6 shows an example of a liquefied gas storage tank. In this liquefied gas storage tank, a side liner 10 extending along the inner wall surface of the frame 9 and a bottom liner extending along the inner bottom surface of the frame 9 are shown. 11, and a corner liner 12 whose upper edge is overlapped and welded to the side liner 10 and whose lower edge is overlapped and welded to the bottom liner 11,
Make up the lining.

[0009]

In recent years, when a liquefied gas storage tank having a lining structure as shown in FIG. 6 is constructed, a large number of metal plates which have been bent in advance are joined to one side of a butt from the center side of the frame 9. Welding in the circumferential direction of the skeleton 9 by welding,
The formation of the corner liner 12 is being considered.

However, in the lining structure shown in FIG. 6, the gap between the corner liner 12 and the frame 9 is too small, and it is difficult for a worker to pass through the gap.
The metal plate supporting device shown in FIG. 5 has a restraining plate 4, a strong back key plate 5, a wedge-shaped member 6, and a key nut 7 arranged on the side opposite to the welding surface of the metal plates 1 and 2, and the metal before the start of TIG welding. Since the position setting of the plates 1 and 2 and the support of the backing material 3 are performed from the anti-welding work surface side, the metal plate supporting device shown in FIG. 5 is applied to the formation of the corner liner 12 as described above. It is not possible.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and is a metal plate capable of supporting a backing material from a welding work surface side and setting a position of a metal plate to be butt-welded on one side from the welding work surface side. It is intended to provide a support device.

[0012]

In order to achieve the above object, in the metal plate supporting apparatus according to the first aspect of the present invention, the metal plate is arranged on the side opposite to the welding surface of the metal plate to be butt-welded. A first support, a second support disposed on the welding surface side of the metal plate to be butt welded on one side, and a welding groove portion of the metal plate to be butt welded on the opposite side to the welding surface A backing member formed with a groove extending from the welding groove portion and facing the welding groove portion; a supporting member fastening bolt inserted through the second supporting member and screwable to the first supporting member; A backing material fixing bolt which is inserted into the second support and can be screwed to the backing material; and a backing material fixing screw which is screwed to the second support and whose tip end is to be butt-welded. And an adjustment bolt that can be brought into contact with it.

[0013] In the metal plate supporting apparatus according to the second aspect of the present invention, a gas supply channel is provided inside the backing material, and a communication hole is formed from the gas supply channel to a groove.

In any one of the metal plate supporting apparatuses according to the first and second aspects of the present invention, the first support and the metal plate are disposed on the side opposite to the welding surface of the metal plate to be butt-welded. In a state where the second support member arranged on the welding surface side of the above is mutually fastened with the support member fastening bolt, the backing material fixing bolt inserted through the second support member is fixed to the opposite side of the metal plate. The backing material is screwed into the backing material arranged on the welding work surface side, the backing material is supported from the welding work surface side, the adjusting bolt is attached to the second support, and the tip of the adjusting bolt contacts the metal plate. , And the position of the metal plate is set from the welding work surface side.

In the metal plate supporting apparatus according to a second aspect of the present invention, the inert gas supplied to the gas supply flow path of the backing material faces the welding groove portion of the metal plate from the communication hole. The gap between the welding groove of the metal plate and the backing material is maintained in an inert gas atmosphere.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 4 show an embodiment of a metal plate supporting device according to the present invention. This metal plate supporting device is used for a surface to be welded of left and right metal plates 1 and 2 to be butt-welded. The first support 21 disposed on the side, the second support 22 disposed on the welding surface side of the metal plates 1 and 2, and the groove portion of the metal plate 1, 2 on the side opposite to the welding surface And a backing material 23 for covering from above, a supporting body fastening bolt 24, a backing material fixing bolt 25, and an adjusting bolt 26.

The metal plates 1 to be subjected to butt single-side welding are
No. 2 is bent into a curved shape like the corner liner 12 shown in FIG.
IG welding.

The first support 21 includes a support member 27 that curves along the groove of the metal plates 1 and 2, and the support member 27.
And a support member 28 curved along the vicinity of the groove of the metal plates 1 and 2, and a lateral direction arranged at substantially equal intervals up and down and fixed to the convex curved surfaces of the support members 27 and 28. And a plurality of connecting members 29 extending in the form of a lattice.

The support members 27 and 28 and the connecting member 2
For 9, flat steel is used.

The support members 27 and 28 have a longer arc and are gently curved than the metal plates 1 and 2 so that both end portions can be located outside the upper and lower edges of the metal plates 1 and 2.

At four corners of the first support 21, holes 21a penetrating the support member 28 and the connecting member 29 in the thickness direction are provided.
A hole for supporting member fastening 2 is provided on the surface of the connecting member 29 on the side opposite to the supporting member so as to correspond to the hole 21a.
A nut 24a to which the screw 4 can be screwed is fixed.

The second support member 22 includes left and right support members 30 curved along the metal plates 1 and 2, and a vertically extending upper and lower portion fixed to the upper and lower ends of the concave curved surface of the support member 30. Are formed in a frame shape.

The support member 30 is made of angle steel, and the connecting member 31 is made of flat steel.

The support member 30 is disposed such that both end portions thereof can be located outside the upper and lower edges of the metal plates 1 and 2.
It is curved longer than 2.

At the four corners of the second support member 22, holes 22a which penetrate the support member 30 and the connection member 31 in the thickness direction and through which the support fastening bolts 24 are inserted are formed. An intermediate portion of the member 31 is provided with a hole 31a that penetrates in the thickness direction thereof and through which the backing material fixing bolt 25 is inserted.

Further, a plurality of holes 30a penetrating in the plate thickness direction are formed in the support member 30 in a line in the longitudinal direction of the member, and the concave curved surface of the support member 30 has holes corresponding to the holes 30a. A nut 26a to which the adjustment bolt 26 can be screwed is fixed so as to perform the adjustment.

The backing material (backing copper plate) 23 is arranged so that both end portions thereof can be located outside the upper and lower edges of the metal plates 1 and 2.
It is curved longer than the metal plates 1 and 2.

The surface of the backing material 23 covering the groove portions of the metal plates 1 and 2 has a groove 2 extending opposite to the groove portion.
3a are formed.

In addition to this, the backing member 23 is formed with a gas supply passage 23b which extends vertically in the longitudinal direction of the member, and a communication hole 23c which penetrates from the gas supply passage 23b to the groove 23a. .

At the upper and lower ends of the backing material 23, screw holes 23d into which the above-mentioned backing material fixing bolts 25 can be screwed are provided.

When performing one-sided butt welding using the metal plate supporting apparatus shown in FIGS. 1 to 4, a first support member is provided in accordance with the groove portions of the metal plates 1 and 2 to be joined to each other. The backing material 23 is placed on the concave curved surface of the support member 27 of the first support 21.

Next, the metal plate 1 is placed on the left side of the first support 21 and the metal plate 2 is placed on the right side of the first support 21. It is positioned so as to overlap the backing material 23.

Further, a second metal plate is provided on the welding surface side of the metal plates 1 and 2.
And the tip of the support fastening bolt 24 inserted into the hole 22 a is fixed to the nut 2 of the first support 21.
4a, the second support 22 is attached to the first support 21.
And the backing material fixing bolt 25 inserted through the hole 31a.
Is screwed into a screw hole 23d of the backing material 23, and the backing material 23 is fixed to the second support 22.

In addition, an adjusting bolt 26 is attached to a nut 26 a of the second support 22, and the tip of the adjusting bolt 26 is a metal plate 1.
2 is screwed into contact with the welding work surface
2 to restrain the displacement in the width direction of the plate and the nut 26
The adjustment position of the metal plates 1 and 2 in the plate thickness direction is adjusted by appropriately adjusting the amount of protrusion of the adjustment bolt 26 from the position a.

In this state, the gas supply passage 2 of the backing material 23
3b, the argon gas is continuously supplied to the communication hole 23c.
From the metal plate 1 by the argon gas flowing into the groove 23a from the
The gap between the groove 2a and the groove 23a is maintained in an inert gas atmosphere, and the groove portions of the metal plates 1 and 2 are TIG-welded from the welding construction side where the backing material 23 is not arranged.

After the TIG welding of the metal plates 1 and 2 is completed,
The screw between the nut 24a and the support fastening bolt 24 is released, the fastening between the screw hole 23d and the backing material fixing bolt 25 is released, and both bolts 24 and 25 are removed from the first support 21. , The first support 21 and the second
The support 22 is removed.

As described above, in the metal plate supporting device shown in FIGS. 1 to 4, the backing material fixing bolt 25 inserted through the second support 22 on the welding work surface side is screwed onto the backing material 23. Because of this, the backing material 23 can be supported from the welding work surface side.

Further, the adjusting bolt 2 is attached to the second support 22.
6 is screwed in such a manner that the tip end thereof comes into contact with the metal plates 1 and 2, so that the position setting of the metal plates 1 and 2 can be performed from the welding work surface side.

Therefore, after joining the groove portions of the metal plates 1 and 2 adjacent to each other on the left and right sides, the fastening of the bolts 24 and 25 is released, and the first plates 1 on the side opposite to the welding surface of the metal plates 1 and 2 are released. By pulling out the support 21 upward, a corner liner 12 having a lining structure as shown in FIG. 6 can be formed.

Further, the argon gas supplied to the gas supply passage 23b of the backing material 23 is guided from the communication hole 23c to the groove 23a facing the groove portion of the metal plates 1 and 2.
The gap between the groove portion of the metal plates 1 and 2 and the backing material 23,
The inert gas atmosphere can be reliably maintained.

It should be noted that the metal plate supporting device of the present invention is not limited to only the above-described embodiment, and the present invention
It goes without saying that the present invention can be applied to inert gas shield welding other than IG welding, and that other modifications can be made without departing from the scope of the present invention.

[0043]

As described above, according to the metal plate supporting apparatus of the present invention, the following various excellent effects can be obtained.

(1) Claim 1 or Claim 2 of the present invention
In any of the metal plate supporting devices described in the above, since the backing material fixing bolt inserted through the second support on the welding work surface side is screwed to the backing material, the backing material is welded to the welding work surface side Since the tip of the adjusting bolt screwed to the second support is brought into contact with the metal plate, the position of the metal plate can be set from the welding work surface side.

(2) In the metal plate supporting apparatus according to the second aspect of the present invention, the inert gas is caused to face the groove portion of the metal plate via the gas supply passage and the communication hole of the backing material. Therefore, the gap between the groove portion of the metal plate and the backing material can be reliably maintained in an inert gas atmosphere.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing an example of an embodiment of a metal plate support device of the present invention.

FIG. 2 is an overall perspective view showing an example of an embodiment of the metal plate supporting device of the present invention.

FIG. 3 is a partial sectional view showing a fastening state of a first support and a second support in FIGS. 1 and 2;

FIG. 4 is a partial cross-sectional view showing a state in which a backing material is fixed to a second support in FIGS. 1 and 2;

FIG. 5 is a partially cut perspective view showing an example of a conventional metal plate supporting device.

FIG. 6 is a partial sectional view showing an example of a lining structure of a liquefied gas storage tank.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 metal plate 2 metal plate 21 first support 22 second support 23 backing material 23 a groove 23 b gas supply channel 23 c communication hole 24 support fastening bolt 25 backing fixing bolt 26 adjustment bolt

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4E001 AA03 BB07 CA03 4E081 AA12 BA03 BA40 BB15 CA11 DA05 DA28 DA36 EA39

Claims (2)

[Claims] 1. A first support disposed on a side opposite to a welding surface of a metal plate to be butt-welded and a second support disposed on a side of a welding surface of a metal plate to be butt-welded. A supporting member, a backing material covering a welding groove portion of the metal plate to be butt-welded on one side from the non-welding work surface side, and having a groove formed extending opposite to the welding groove portion; A backing material fixing bolt inserted through the body and screwable to the first support; a backing material fixing bolt inserted through the second support and screwable to the backing material; A metal plate supporting device, comprising: an adjusting bolt screwed to the support and having a tip portion that can abut against a welding surface of the metal plate to be butt-welded. 2. The metal plate supporting device according to claim 1, wherein a gas supply passage is provided inside the backing material, and a communication hole is formed from the gas supply passage to the groove.