JP3380202B2 - Thin panel structure block machining method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a thin panel structural block on a deck (car deck) or side outer panel of an automobile carrier and a deck or wall of an upper structure of a vessel.

[0002]

2. Description of the Related Art Thin plate panel structures are used for car decks and side skins of automobile carriers and decks and wall plates of superstructures of ships.

When manufacturing a thin panel structure block,
When the longe, transformer, girder, etc. are welded to the thin panel of the main plate (foot welding), distortion occurs in the thin panel due to the heat effect.

Therefore, as an example of a working method for preventing such distortion as much as possible, conventionally, as described in Japanese Patent Application Laid-Open No. 6-16175, a web of a longe (beam) is continuously welded on one side to a thin plate panel. The amount of heat was suppressed to a low level, and strain relief (hot strain relief with a gas burner) was performed in a state where the long sheet was previously attached to the thin plate panel.

[0007] Then, the thin plate panels to be attached with the longes are butted against each other on the surface plate, the plate joints thereof are welded, then the girder and the transformer are welded, and then the whole block is reversed to leave a plate on the surface of the remaining thin plate panel. We were welding the joints.

[0006]

However, since the heat effect does not completely disappear when the heat input is kept low, even if a longe is attached in advance and distortion is removed, a transformer or girder is attached to the thin plate panel. Since the welding is performed on the steel sheet, distortion due to the heat is generated. Therefore, it is necessary to perform the strain removing operation again at the final block completion (or after mounting).

As described above, in the conventional method for manufacturing a thin plate panel, if the girder or the like is welded first, it will be an obstacle during the plate splicing welding. However, since the size of the plate is decided by this, the strain generated during welding such as girder cannot be escaped to the plate joint, and the final strain at the time of block completion (or mounting) I had to do some work. In this case, when hot strain relief is performed by the gas burner, there is a problem that the strain spreads due to the heat effect. Therefore, the number of man-hours required for the strain removal work is not so different from the conventional one.

The object of the present invention is to perform the plate joint welding of thin-plate panels with a longe in front after the welding of transformers and girders, which are large bones, so that the strain generated during large bone welding is released to the plate joint portion. Accordingly, it is an object of the present invention to provide a method for manufacturing a thin panel structure block that can eliminate the strain removal work after the block is completed (or mounted).

[0009]

In order to solve the above-mentioned problems, a thin plate panel structure block machining method according to the present invention is configured such that a plurality of thin plate panels, each of which is provided with a longe in parallel with a plate joint, are mounted on a surface plate. Place with relief allowance, and the direction orthogonal transformer or girders on longitudinals are Daihone ahead without the plate joint welding of thin panels comrades at this point
After straddling between the thin plate panels so as to cover it from above the longe, it is welded to the thin plate panel, and then the block of the thin plate panel is inverted and supported on the surface plate through the large bone.
The distortion caused by the adjusting while welding Daihone so the thin panel to a flat state by the platen relief by relief margin of the plate joints with, so then performing plate joint welding of the thin panel comrades It was done.

By welding a large-sized transformer or girder to a thin plate panel in a free state where plate joints are not welded, the position of the thin plate panel is determined, and after the block is inverted, the thin plate panel is flattened to a large state. The strain generated at the time of bone welding can be released to the plate joint (a clearance for the plate provided between the thin plate panels) to eliminate the strain removing work after the block is completed (or mounted).

Further, one or both of a plurality of thin plate panels to which a longe is preliminarily provided in parallel with the plate joint portion, a channel material is protruded at a plate end portion along the plate joint portion, and the channel material is preliminarily attached together with the longe. of the thin panel juxtaposed with a relief allowance plate to the surface plate so as to extend over the panel next to the channel member, and said longitudinals trans or girder is Daihone ahead without the plate joint weld at this point From above
After it is laid across the thin plate panels in the direction orthogonal to the longes so as to cover it, it is welded to the thin plate panels, and then the block of the thin plate panels is inverted and placed on the surface plate through the large bone.
The distortion caused by the adjusting while welding Daihone so the thin panel to a flat state by the surface plate while supporting relief by relief margin of the plate joints, then welding the channel members to both thin panels This is a method for manufacturing a thin panel structure block in which thin plate panels are joined together by doing the above.

Also in this case, the plate joint welding between the thin plate panels (in this case, the plate joint through the channel material extending between the thin plate panels) should be performed after the welding of the transformer and the girder, which are the main bones. Thus, the strain generated at the time of welding the large bones is released to the plate joint (a clearance for the plate provided between the thin plate panels), whereby the strain removing work after the block is completed (or mounted) can be eliminated.

In the above structure, when strain caused by pre-welding of the longe (which may include the channel material) is removed by cold strain relief work before attaching the large bone to the thin plate panel, the Since strain due to heat does not newly occur unlike strain relief, the number of man-hours required for strain relief work can be reliably reduced.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

1 to 4 are views showing a time course of a working process of a thin plate panel structure block according to the present invention. The following describes a car deck (automobile deck) panel structure, which is a typical example of a thin plate panel structure.

First, as shown in FIG. 1 (a), a thin plate panel which is a main plate of 6 to 13.5 mm to be a car deck is placed on a surface plate (not shown), and a flange is formed on the thin plate panel 1. Angled longie 2 consisting of 2a and web 2b
Are juxtaposed at equal intervals in parallel with a plate joint (plate joint) 3 to be a seam of the plate later, and fixed on the thin plate panel 1 by temporary welding. Usually, three to four longes are arranged with a steel plate of a fixed width.

Then, as shown in FIG. 1 (b), in the single plate state, the longe 2 is preliminarily attached to the thin plate panel 1 by an automatic welding machine by continuous welding on one side or continuous welding on both sides. It is desirable to perform welding with the minimum welding leg length on only one side in order to suppress welding heat input and prevent distortion as much as possible, but after welding, the thin plate panel 1 causes welding distortion called a so-called "slim horse" as shown in the figure.
Therefore, the distortion due to the welding of the longe foot is also removed in the single plate state. As shown in the figure, while rolling the rollers 4 on both sides of the longe 2 while rolling them in the longitudinal direction of the longe, cold strain relief work (strain relief by roller pressure type) is performed so that the strain falls within an allowable range. To do.
Although hot strain relief with a gas burner may be performed, cold strain relief is preferable in order not to newly generate strain due to heat input.

In the same manner, a plurality of thin plate panels, which are cold-relieved, are manufactured in advance by attaching a longe or the like. In this case, as shown in FIG. 2 (a), the adjoining side (on the right side of the drawing) to be joined
In the thin plate panel 1, the channel material 5 is preliminarily attached along with the other end of the flange 5a so that the flange 5a of the channel member 5 extends outward along the plate end to be the plate joint 3. Then, cold strain relief work is performed on this thin plate panel as described above.

Then, as shown in FIG. 2 (b), the thin plate panels are placed on the surface plate 1 so that the channel members 5 straddle the adjacent panels with a clearance (gap) G of a predetermined (several millimeters) plate. Place it facing each other. That is, at this time, the flange 5a portion of the channel material 5 is juxtaposed in the plate joint portion 3 so as to straddle between the thin plate panels 1 on both sides to form a lap structure joint. At this point, one (right) thin plate is joined. The channel material 5 preliminarily attached to the panel is not welded to the thin plate panel 1 on the other side (left side), and plate piecing welding is performed in a later step.

As shown in FIGS. 3 (a) and 3 (b), the channel member 5 is laid over (temporarily attached) to the plate joint 3 to which the longe 2 is attached in advance.
The thin plate panel 1 in such a state is placed face-to-face on a surface plate, and a transformer or girder 6 which is a large bone is placed so as to cover the longe 2 from above in a direction orthogonal to the longe 2 and the foot is welded. The two thin plate panels 1 are connected to each other by welding a transformer or a girder 6 to form a block B having a thin plate panel structure. At this time, new distortion is generated by welding the transformer or the girder 6.

As shown in FIG. 4 (a), the block B of the thin plate panel structure is inverted to form a transformer or a girder 6.
It is placed on the surface plate 7 so as to be supported via. At this time,
Adjust with a jack or the like so that one side of the thin plate panel that becomes the car deck surface is as flat as possible. And
At the same time, the strain newly generated by welding the transformer or the girder 6 is released by the clearance G of the plate joint 3. When welding the transformer or girder 6, which is originally a large bone, the thin plate panel 1 does not join the plates and is free to move. Therefore, the new distortion caused by the welding of the large bone is allowed to escape at the plate joint 3. You can This makes it possible to suppress the distortion of the thin plate panel 1 within an allowable range.

As shown in FIG. 4 (b), welding of a, b, and c in the plate joint portion 3 of the last remaining channel material 5 is performed. Here, for the first time, the thin plate panel 1 is joined by plate joints. The channel material 5 not only serves as a plate joint,
Like the other longes 2, it also serves as a reinforcing material for the thin panel 1.

In the above-mentioned embodiment, the lap structure joint is formed by the channel material 5, but instead of this, the lap structure joint is formed as shown in FIGS.
As shown in FIG. 5, a butt welding may be performed by taking a welding groove 8 having a predetermined clearance G in the plate joint 3 of the thin plate panels 1 according to the plate thickness of the thin plate panel 1. In this case, the scallop 10 for applying the backing material 9 is opened in the transformer or the girder 6.

In this method, as in the above-described embodiment, plate-joint welding is not performed in the state where the thin plate panels 1 having the previously attached longes 2 are butted, but the transformer or girder 6 is first welded. Then, after inverting the block of the thin panel structure, in the state where the thin panel is flattened, new distortion caused by the foot welding of the transformer or the girder is released at the plate joint portion, and finally the butt (plate joint) welding of the thin panel members is performed. Good. This method is mainly applicable to superstructure walls and deck thin panels.

[0025]

As described in the present invention, according to the working method in which the plate joint welding of the thin-plate panels having the longes ahead is performed after the welding of the transformers and the girders, which are the main bones, according to the working method, The strain caused by welding can be released to the clearance of the plate joint and the strain can be suppressed within the allowable range. As a result, the strain removal work after the block is completed (or mounted) is eliminated, and the man-hours required for the strain removal work are greatly reduced. Can be reduced to

[Brief description of drawings]

FIG. 1 (a) is a schematic perspective view of a state in which a longe is first attached to a thin plate panel, and FIG. 1 (b) is a front view of a state in which the strain caused by the longe welding is cold-relieved.

FIG. 2 (a) is a perspective view of a thin plate panel having a pre-attached longe and a thin plate panel having a channel material pre-positioned at a plate joint portion before being juxtaposed on a surface plate, and FIG. 2 (b) shows the two thin plates. It is a front view when the panels are juxtaposed in a state in which a lap structure joint made of a channel material is formed.

FIG. 3A is a perspective view when a transformer or a girder is welded to a plurality of thin plate panels to which a longe is attached, and FIG. 3B is a front view thereof.

FIG. 4 (a) is a front view when a block of a thin plate panel structure is inverted and placed on a surface plate, and FIG. 4 (b) is a main part view when the remaining part of the channel material at the plate joint is welded. Is.

FIG. 5 is another embodiment in which a channel member is not used for the plate joint, (a) is a front view when the thin plate panels are butt-welded together by taking a welding groove, and (b) is a plate joint. FIG.

[Explanation of symbols]

1 thin panel 2 Longe 3 Plate joint (plate joint) 4 rollers 5 channel material 6 large bones (trans or girder) 8 Weld groove 9 Backing material 10 Scallop G escape fee B Thin panel structure block

Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B63B 9/06

Claims (3)

(57) [Claims] 1. A plurality of thin plate panels, each of which is provided with a longe in parallel with the plate joint, are placed on a surface plate with a clearance for the plates, and at this point, the large bones are not joined to each other without the plate joint welding. The transformer or girder which is the above is spanned between the thin plate panels so as to cover it from the upper part in the direction orthogonal to the longe, and then this is welded to the thin plate panel, and then the block of the thin plate panel is inverted to the large bone. On the surface plate
The distortion caused by the adjusting while welding Daihone so the thin panel to a flat state by the surface plate while supporting relief by relief margin of the plate joints in the plate joint welding of subsequent thin panel comrades A method for manufacturing a thin panel structure block, which is characterized by being performed. 2. A channel material is protruded from one or both of a plurality of thin plate panels to which a longe is preliminarily provided in parallel with the plate joint portion, at a plate end portion along the plate joint portion, and the channel material is preliminarily attached together with the longe. of the thin panel juxtaposed with a relief allowance plate to the surface plate so as to extend over the panel next to the channel member, and said longitudinals trans or girder is Daihone ahead without the plate joint weld at this point Cover from above
As shown in the figure, after straddling between the thin plate panels in the direction orthogonal to the longitudinal, this is welded to the thin plate panels, and then the block of the thin plate panels is inverted and supported on the surface plate through the large bone.
The distortion caused by the adjusting while welding Daihone so the thin panel to a flat state by the platen relief by relief margin of the plate joints, and then welding the channel members to both sheet panels as well as Therefore, a method for working a thin plate structure block is characterized in that thin plate panels are joined together. 3. The method for working a thin plate panel structure block according to claim 1, wherein the strain caused by the pre-welding of the longe is removed by a cold strain removing operation before the large bone is attached to the thin plate panel.