JPH0550230A - Manufacture of box shaped structural material - Google Patents

Abstract

PURPOSE:To manufacture a box shaped structural material on which welding defects are not easily generated, a high finished accuracy is maintained and workability is good. CONSTITUTION:In the four corners of welding patches attached on the four sides of a diaphragm 5, notched parts 9 through which backing strips 10 for corner welding may be inserted are provided; on the rear side of the corner welding parts of four side panels with which the diaphragm 5 is enclosed and temporarily fixed, the backing strips 10 are inserted through the notched parts 9 and are continuously arranged along a welding line; the outflow of the molten metal of the corner welding parts, generation of blow holes and delayed cracking, etc., are prevented.

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 such as a box pillar of a skyscraper.

[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 with four corners welded to each other, and various manufacturing methods have been proposed. For example, it is a manufacturing method as shown in FIGS. 9 (a) and 9 (b).

In this conventional manufacturing method, two side plates 1A (hereinafter referred to as webs) having welding grooves 2 at both ends, and two side plates 1B having no welding grooves (hereinafter referred to as flanges) are used.
A box-type structural material is temporarily assembled by temporarily attaching a diaphragm 5 having a columnar space 4 by attaching a welding metal member 3 to four sides.
The corner welding 6 is applied to the groove at the four corners (a), the flange 1B and the web 1A are provided with the conducting holes for conducting to the columnar spaces 4, and the consumable nozzle type electroslag welding 7 (hereinafter referred to as CES welding) is performed. Also, the flange and the diaphragm were welded together (b).

[0004]

In such a conventional manufacturing method, the four webs 1A and the flanges 1B having a rectangular cross section are used.
Since the diaphragm to which the welding metal 3 is attached is fitted and arranged inside the one side plate, even if the back metal is attached to the back surface of the welding groove 2, the welding metal 3 attached to the diaphragm interferes. It became impossible to install continuously and became discontinuous at the diaphragm position. For this reason, there is a problem that molten metal is likely to flow out from the corner welds, cracks and blowholes are easily generated in the corner welds, and the temporary assembly is troublesome and the workability and the assembly accuracy are deteriorated. It was

The present invention is intended to solve the above problems. The purpose is to arrange the backing plate continuously along the back surface of the corner welded part of the side plate, and without producing welding defects in the corner welded part, etc., it is possible to efficiently manufacture a box type structural material with high finishing accuracy. Proposing a manufacturing method.

[0006]

This box-type structural material manufacturing method is a method for manufacturing a box-type structural material in which square diaphragms are mounted inside four side plates having square cross-sections in which four corners are square-welded. Welding metal fittings are attached to the four sides of the diaphragm to form a columnar space, a notch is provided at the position of the corner welding back surface of the welding metal fitting, and a back metal fitting is inserted through the notch on the back surface of the side plate for corner welding. The above-mentioned problems are solved by adopting a configuration in which they are continuously attached along the corner welding line.

[0007]

Embodiments will be described below with reference to illustrated embodiments. Figure 1
Is a diaphragm 5 used in this embodiment, and has a rectangular shape, and has rectangular flat projections 8 at two opposite side corners. As shown in FIG. 2, a notch metal 3A, which is longer than the side length and has both ends protruding from the protrusion 8 and the tip corners of which are notches 9, is attached to both sides of the two sides from which the protrusion 8 protrudes. , 8 form a columnar space 4A. The metal plate 3B is attached between the cutout metal parts 3A on both sides without the protrusions 8 to form a columnar space 4B extending between the corner parts of the cut metal plate 3A. The notch 9 of the notch metal 3A has a shape corresponding to the cross-sectional size of the back metal used for side plate corner welding, and the back metal can be inserted therethrough.

Surrounding the diaphragm 5 to which the abutments 3A and 3B are attached, as shown in FIG. 3, four side plates, that is, two webs 1A having a groove 2 at both ends thereof, are attached to the notch abutment 3A. Then, the two flanges 1B having no groove are temporarily attached to the side where the metal plate 3B is attached to temporarily assemble the box-type structural material. At this time, the grooves 2 at both ends of the web 1A
A backing metal 10 for corner welding is temporarily attached to the back surface of the, and the notch 9 is inserted and continuously arranged.

In the box-shaped structural member thus temporarily assembled, the groove portions at the four corners are first subjected to corner welding by MAG welding or submerged arc welding according to a conventional method.
Columnar spaces 4B and 4 on the flange 1B and the web 1A.
A box-shaped structural member is manufactured by boring a conductive hole to A and electro-slag welding a columnar space to weld a web, a flange and a diaphragm.

In order to mount the side plate surrounding the diaphragm 5 of FIG. 2, as shown in FIG.
B is attached to the side where it is attached, two flanges 1B are attached to the side where the cutout metal 3A is attached, backing metal 10 is temporarily attached to both ends of the web 1A, and it is inserted into the cutout 9 to continue. It can also be arranged.

Further, as shown in FIG. 7, a notch metal 3A having a notch 9 at both end corners and having notches 9 at both ends is attached to the two sides of the diaphragm 5 having no notch, and the protrusion 8 has two sides. The columnar spaces 4A and 4B may be formed by attaching the metal plate 3B between the notched metal pieces. FIG. 8 shows an embodiment in which the diaphragm 5 is surrounded and the web 1A and the flange 1B are temporarily attached, and the backing plate 10 is continuously provided by inserting the web 1A into the notch 9 along the back surface of the groove 2 of the web 1A.

[0012]

ACTION AND EFFECTS OF THE INVENTION The present invention has the above-described structure. In this manufacturing method, since the backing metal is continuously attached and welded to the back surface of the side plate to be corner-welded at the four corners of the box type structural material,
The accuracy and workability of temporary assembly are excellent, and since there is no cut in the backing metal, there is no outflow of molten metal during corner welding, and there are weld defects such as orthogonal cracks, blowholes or delayed cracks that occur at corner welds. Can be prevented.

Therefore, it is possible to efficiently manufacture a box type structural material having no welding defect 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 perspective view showing a partial cross-section of a box-type structural member assembled by temporarily attaching a side plate and a diaphragm.

FIG. 4 is a sectional view of a corner portion of the assembled structural material.

5 is a cross-sectional view taken along the line AA of FIG.

FIG. 6 is a cross-sectional view of a modified example of the assembled structural material.

FIG. 7 is a plan view of a modified example of the diaphragm to which a metal plate for welding is attached.

FIG. 8 is a cross-sectional view of a modified example of the assembled structural material.

9A and 9B 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
… Corner welding, 7… CES welding, 8… Projection, 9… Notch, 1
0 ... back deposit.

Claims (1)

[Claims] 1. A method for manufacturing a box-type structural member comprising a square diaphragm mounted inside four side plates having a square cross-section with corner welding at four corners, and a welding die is mounted on four sides of the diaphragm to form a columnar space. Characterized in that a notch is provided at the corner welding back surface position of the welding metal, and the back metal is inserted on the back surface of the side plate for corner welding, inserted through the notch and continuously attached along the angle welding line. Box-type structural material manufacturing method.