JPH08291B2 - Box-type structural material manufacturing 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 box type structural material used for a skyscraper or the like.

[0002]

2. Description of the Related Art A box-type structural member has a structure in which a diaphragm is attached by welding inside four side plates having a rectangular cross section in which four corners are square-welded, and various manufacturing methods have been proposed. For example, it is a manufacturing method as shown in FIGS.

In this conventional manufacturing method, two webs 1A having welding grooves 2 on both sides, two flanges 1B having no welding groove, and welding metal plates 3 attached to four sides are formed into a columnar shape. A diaphragm 5 provided with a space 4 is temporarily attached, a box-type structural material is temporarily assembled, and corner welds 6 are applied to the four corners of the groove (a).
The flange 1B and the web 1A are provided with a conduction hole that conducts to the columnar space 4, and the consumable nozzle electroslag welding 7
(Hereinafter, referred to as CES welding) to weld the web and the flange to the diaphragm (b).

[0004]

In such a conventional manufacturing method, four webs 1A having a rectangular cross section and the flange 1 are used.
Since the diaphragm to which the welding metal 3 is attached is arranged inside B, even if the back metal is attached to the back surface of the welding groove 2, the welding metal 3 attached to the diaphragm 3
It became a hindrance and could not be installed continuously, and it became discontinuous at the diaphragm position. For this reason, there is a problem that molten metal flows out from the corner welded portion, defects such as cracks and blowholes are easily generated in the corner welded portion, labor is required for temporary assembly, and workability and assembly accuracy are deteriorated. .

In addition, a columnar space for welding is provided between the welding metal fittings attached to the four sides of the diaphragm and the web and the flange, especially between the flange to be finally assembled in the temporary assembly of the box type structural material. A gap was likely to be formed, and the molten metal flowed out from this gap, resulting in a welding defect.

The present invention is intended to solve the above problems. The purpose is to arrange backing metal continuously along the back surface of the corner welded part of the side plate so that welding defects are not likely to occur in the corner welded part. It is an object of the present invention to propose a manufacturing method capable of efficiently manufacturing a box-type structural material in which the gold, the web and the flange are densely assembled, welding defects are less likely to occur between the diaphragm, the web and the flange, and the finishing accuracy is high.

[0007]

This method for manufacturing a box-type structural member is such that two webs having welding grooves on both sides and two flanges having no welding grooves on both sides are square-welded to each other. In a method of manufacturing a box-type structural material in which a square diaphragm is welded and attached to, a side web is temporarily attached to both sides of a horizontally placed lower flange to assemble a U-shaped section.
To a diaphragm having protrusions at both ends of two opposite sides, a notch plate having a length equal to the inner face width of the flange and a notch at both end corners is attached to both sides of one side having the protrusion,
Rectangular metal plates shorter than the length of the two sides without protrusions are in contact with the cutout metal, and a columnar space for welding is provided on the three sides, and the diaphragm is placed with the side to which the cutout metal is attached facing down. After arranging in a U-shaped cross section and temporarily attaching the cutout metal and flange on the lower side of the diaphragm, and the metal and metal on the side, temporarily attach the same cutout metal to the upper side of the diaphragm at the specified height to contact the flange. Adjust and install a columnar space for welding, place the upper flange on it, and square weld the web and the flange, insert the backing metal into the notch part of the notch metal, and attach it continuously. After the temporary assembly, it is characterized in that corner welding between the web and the flange and welding between the web, the flange and the tire flam are performed.

[0008]

The present invention is constructed as described above. In this manufacturing method, the backing metal is continuously attached and welded to the four corner welding back surfaces of the box-type structural material, so the assembly accuracy and workability are excellent, and there is no cut in the backing metal, so it can be used for corner welding. There is no outflow of molten metal, and it is possible to prevent the occurrence of welding defects such as cracks in the orthogonal direction, blowholes, or delayed cracks that occur in corner welds. The notch metal has a length equal to the inner surface width of the flange, and forms a columnar space with no seam between the back metal that is inserted into the notches at both corners.Therefore, molten metal flows out when welding the columnar space. Is unlikely to occur. After temporarily attaching the diaphragm to the inside of the U-shaped cross section where the lower flange and the side web are assembled, a notch metal is attached to the upper side of the diaphragm by adjusting it to a predetermined height. A columnar space can be formed in close contact with each other, welding defects that tend to occur between the upper flange to be finally attached and the diaphragm can be prevented, and highly accurate welding can be performed.

[0009]

EXAMPLES Examples will be described below with reference to the drawings. FIG.
Is a rectangular diaphragm 5 used in this embodiment, and has rectangular protrusions 8 at both ends of two opposite sides. As shown in FIG. 2, on both sides of the two sides where the protrusion 8 is projected, the length is longer than the side length,
A notch metal 3 having a length equal to the inner surface width of the flange 1B, both ends protruding from the protrusion 8 and a tip corner portion being a notch 9
A is attached, and a columnar space 4A for welding is formed between the protrusions 8 and 8. A rectangular metal plate 3B is attached between two notched metal plates 3A on both sides having no protrusion 8 to form a columnar space 4B. However, in this manufacturing method, as described above, the protrusion 8 or the protruding side is first attached with the notch metal 3A only on one side, and the diaphragm is temporarily attached to the flange and the web, and then the notch metal is attached to the other side. It is a thing. Further, the notch 9 of the notch metal 3A has a rectangular shape corresponding to the cross-sectional dimension of the back metal used for side plate angle welding, and the back metal can be inserted therethrough.

In order to temporarily assemble the box structural material having the diaphragm inside, as shown in FIG. 3, the side webs 1A are provided on both sides of the horizontally placed lower flange 1B.
Is erected and assembled in a U-shaped cross section, and the diaphragm 5 is arranged inside this. The notch metal 3A is attached only to one side of the diaphragm 5 where the protrusion 8 is provided in advance. In this case, the columnar space 4A is arranged downward, and the metal plates 3B are arranged so that the columnar spaces 4B face outward on the two sides having no protrusions.

The arranged diaphragm 5 has a flange 1B.
The cutout metal 3A, the web 1B and the metal 3B are temporarily attached and fixed. After that, the notch metal 3A having the same shape as the above is attached to both upper surfaces of the diaphragm 5.

When mounting the notch metal 3A on the upper side of the diaphragm, the lower surfaces of both ends are in contact with the upper surfaces of the side metal 3B, the upper surface is adjusted to a predetermined height, and the columnar space 4A for welding is provided. The upper flange 1B is placed on this and temporarily assembled.

In the process of assembling this box-type structural member, a backing metal 10 and a backing metal 10 are formed on the back surface of the groove 2 for corner welding the web 1A and the flange 1B, and the notch 9 at the tip corner of the notch metal is formed. Insert through and place continuously.

FIGS. 4 and 5 show a box-shaped structural member which has been temporarily assembled in this manner. According to a conventional method, first, the groove portions at the four corners are arranged so as not to face upward, and MAG welding or submerged arc welding is performed. Corner welding by using the flange 1B
In addition, the columnar spaces 4B and 1A are provided with conductive holes for conducting to the columnar spaces 4B and 4A, and the columnar spaces are electroslag-welded to weld the web, the flange and the diaphragm to produce a box-type structural material.

[0015]

As described above, the present invention makes it possible to efficiently manufacture a box-type structural material having no welding defects and high dimensional accuracy.

[Brief description of drawings]

FIG. 1 is a plan view of a diaphragm.

FIG. 2 is a plan view of a diaphragm to which a welding metal plate is attached.

FIG. 3 is a cross-sectional view of the temporarily assembled box-type structural material.

FIG. 4 is a perspective view showing a partially cross-section of the temporarily assembled box-type structural member.

FIG. 5 is a cross-sectional view of a corner welded portion of the temporarily assembled box-type structural material.

6 (a) and 6 (b) are cross-sectional views showing a conventional method for manufacturing a box-type structural material.

[Explanation of symbols]

1 ... Side plate, 1A ... Web, 1B ... Flange, 2 ... Groove,
3 ... Welding metal, 4 ... Columnar space, 5 ... Diaphragm, 6
… Square welding, 7… CES welding, 8… Projections, 9… Notches, 1
0 ... back deposit.

Claims (1)

[Claims] 1. A method for producing a box-type structural member, comprising two webs having welding grooves on both sides and two flanges having no groove, which are square-welded, and a square diaphragm is welded and attached inside. In the above, the side flanges are temporarily attached to both sides of the horizontally placed lower flange to assemble them into a U-shaped cross section, and a diaphragm having protrusions on both ends of the two opposite sides is attached to both sides of one side having the protrusions. Attach a notch plate with a length equal to the inner face width of the flange and notches at both corners, and attach a rectangular plate shorter than the side length to the notch plate on both sides without protrusions 3 A columnar space for welding is provided on the side, and the diaphragm is placed in the U-shaped cross section with the side with the cutout metal attached to the bottom, and the cutout metal and flange on the lower side of the diaphragm and the metal and web on the side are temporarily After attaching the same to the upper side of the diaphragm Adjust the cutout metal to a predetermined height so that it will contact the flange, and provide a columnar space for attachment welding, place the upper flange on it, and square weld the web and flange. A method for manufacturing a box-type structural material, which comprises inserting into a notch of a metal and continuously assembling and temporarily assembling, and then performing corner welding between the web and the flange and welding between the web, the flange and the diaphragm.