JP2913149B2 - Butt welding method and apparatus for thick steel plate - 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 and an apparatus for butt welding thick steel plates, and more particularly to a method and an apparatus for welding butt welds between flange plates or between a diaphragm and a flange plate at a column connection. .

[0002]

2. Description of the Related Art There are two types of column joints, a column penetrating type and a beam penetrating type. Generally, the column joints are formed by multi-layer welding by carbon dioxide semi-automatic welding. In the column penetration type, since the bracket and the stiffener are attached and welded to the column main body, the column members are assembled in a horizontal state, and the welding posture is horizontal. Further, in the beam penetration type, welding is performed by first assembling the connection block, and thereafter, large assembly with the column main body is performed, and welding with the column main body is performed. For this reason, welding of the connection block and the column main body can always be performed in a downward position by changing the position of the connection block.

[0003] However, in any case, since multi-layer welding is performed, there is a problem that welding defects due to slag entrainment and the like are likely to occur between the respective welding layers. In particular, in the case of the column penetration type, the condition is more disadvantageous because the welding posture is horizontal. On the other hand, in the case of the beam penetration type, the welding posture is downward, but the posture of the product needs to be changed frequently, and extra work time is required for the posture change, and there is a problem that the work efficiency is poor. .

[0004] From such a point, conventionally, in a welded portion between a column member and a beam, bevel cutting is performed on at least one surface of one or both members of a butt portion thereof.
A groove has been proposed in which a longitudinal groove is drilled at the center in the thickness direction of the end face, the bevel portion is tack-welded, and then the groove portion is subjected to single-layer upward welding by electroslag welding or electrogas welding. (JP-A-5-27725).

[0005]

However, in this conventional method, since the conventional electroslag welding or electrogas welding method in which the welding torch is pulled straight out, the cross-sectional area of the groove that can be welded is limited. As a result, there is a problem that the usable thickness range is limited, and there is a problem that machining of the groove portion is troublesome.
It is an object of the present invention to provide a welding method with a simple groove preparation and a wide usable thickness range, paying attention to such points.

[0006]

In order to achieve the above object, the first aspect of the present invention is to provide two thick steel plates forming a column joint.
Are arranged in a state where the pair of groove spaces formed is vertically oriented, and electrogas welding is performed while weaving a welding wire according to the shape of the pair of groove spaces.

According to the second aspect of the present invention , a base member is disposed in the vicinity of a groove space formed by butt-arranging thick steel materials, and the elevating table can be moved up and down on the base member.
The horizontal platform can be moved back and forth on this elevator
To support the torch support base so that it can be moved laterally.
Holding the welding torch on the torch support so that the posture can be changed.
To form an electrogas welding device.
Logas welding equipment (1) is arranged in a pair,
The welding torch of the trotrogas welding device (1) is supported so as to be three-dimensionally movable, and the welding torch is moved upward while weaving according to the signal from the control device in accordance with the cross-sectional shape of the groove space. It is characterized in that the movement is controlled by the control device.

[0008]

According to the present invention, electrogas welding is performed while weaving a welding wire in accordance with the shape of the groove space. The range of wall thickness of the steel material that can be welded can be widened.

Further, in the present invention, since weaving is performed in accordance with the cross-sectional shape of the groove space formed at the joint portion, a simple groove or an I-shaped groove can be used.
Groove processing can be easily performed.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS The drawings show an example of an apparatus for carrying out the present invention,
FIG. 1 is an overall schematic perspective view. This welding device (1)
A base member (3) disposed in the vicinity of a groove space (2) formed vertically by arranging two thick steel plates (A) and (B), and a base member (3). An elevating platform (4) that can be moved up and down, a horizontal moving platform (5) supported by the elevating platform (4) so as to be able to move back and forth, and a torch support that is supported by the horizontal moving platform (5) so as to be able to move left and right. Stand (6) and this torch support stand
(6) a welding torch (7) of an electro-gas welding device supported so as to be able to change the supporting posture, a control device (8) for moving the welding torch (7) in a three-dimensional direction, and a lift (4). It is composed of the cooling money (9) that has been put out.

The welding device (1) is a control device.
Based on the command from (8), as shown in FIG. 2, the welding torch (7) is moved in a horizontal plane in accordance with the cross-sectional shape of the groove space (2), and a part of the base material is melted. And the inside of the groove space (2) is filled with the molten metal of the welding wire to integrate the two thick steel materials (A) and (B).

The welding apparatus includes, for example, a portion where a beam member (11) is welded to a column member (10) in a column member penetrating type connection shown in FIG. 3, and a beam penetrating type connection shown in FIG. The welding portion of the column member (10) to the beam member (11) in the above, or the end face of the flange (12) in the connection block shown in FIG. 5 and the beam member (11)
And a welding portion between the flange portion (13) of one beam member (11a) and the flange portion (14) of the other beam member (11b) in the connection block formed by beams shown in FIG. Used for welding.

FIG. 7 shows an example of use of a welding device for welding and fixing a beam portion (11) to the surface of a column member (10) at a connection portion of a column penetration type, and this welding unit is supported in a horizontal horizontal position. A welding equipment moving rail (15) is arranged along the column member (10) thus set, and a welding equipment supporting cart (16) is movably arranged on the moving rail (15). From 16), the welding device support arm (17) can be moved up and down and retractable,
A pair of welding devices (1) at the tip of the welding device support arm (17)
(1) is allocated and arranged in a state where the interval can be adjusted.

When the welding unit thus configured is used, the flange portions of the column member (10) and the beam member (11) can be simultaneously welded at two places. In addition, when the welding unit is arranged opposite to the column member (10) arranged in the horizontal position, four welding portions can be simultaneously performed, so that the beam members (11) are connected in all directions. Even when the column member (10) is to be ejected, the posture of the column member (10) may be changed once.

In the above embodiment, the T-joint portion in which the groove shape is formed in a D-shape has been described. However, the present invention can also be applied to a cross-shaped joint portion and a plate joint portion. Further, the present invention can be applied to an I-shaped groove or a V-shaped groove.

[0016]

According to the present invention, since the welding wire is subjected to the electrogas welding while weaving the welding wire in accordance with the shape of the groove space, the dimensional width of the cross-sectional area of the groove space which can be handled is increased. In addition, the thickness range of a steel material that can be welded in one pass can be widened.

Further, in the present invention, since weaving is performed in accordance with the cross-sectional shape of the groove space formed at the joint, the groove does not need to be processed into a special shape, and the groove processing is simple. Can be done.

[Brief description of the drawings]

FIG. 1 is an overall schematic perspective view showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a groove portion.

FIG. 3 is a perspective view showing a connection part of a pillar penetration type.

FIG. 4 is a perspective view showing a connection part of a beam penetration type.

FIG. 5 is a perspective view of a connection block.

FIG. 6 is a perspective view of a different connection block.

FIG. 7 is a perspective view of a welding unit.

[Explanation of symbols]

AB · thick steel plate, 2 · groove space, 3 · base member, 4 · · ·
Lifting table, 5: horizontal moving table, 6: torch support table, 7: welding torch, 8: control device.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Izumi Takagishi 4-153 Ohara, Yao-shi, Osaka Matsumoto Machine Co., Ltd. (56) References JP-A-56-169771 (JP, A) JP-A-51 −149144 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) B23K 9/00, 9/02 B23K 9/12, 9/173

Claims (2)

(57) [Claims] 1. Two thick steel plates (A) constituting a column connection part
(B) is arranged in a butt shape, and in a butt welding method of a thick steel material in which this joint is automatically welded, a pair of groove spaces (2) formed by both the thick steel materials (A) and (B) are formed. place in a state in which a standing orientation, while weaving in accordance with the two planks steel (a) (B) cross-sectional shape of the groove of the welding wire each with a pair of groove spaces (2) in which is formed between A butt welding method for a thick steel material, characterized by performing electrogas welding. 2. A butt-joining portion of two thick steel plates (A) and (B) constituting a column connection portion arranged in a butt shape with a groove space (2) standing upright. In the welding apparatus, the lifting platform (4) can be moved up and down on a base member (3) arranged in the vicinity of a groove space (2) formed of both thick steel plates (A) and (B).
Support and move the horizontal moving table (5) back and forth on this lifting table (4)
The torch support (6) on the horizontal moving table (5).
Supports lateral movement and enables three-dimensional movement of the welding torch (7)
To form an electro-gas welding apparatus (1).
Electro gas welding equipment (1) arranged in a pair
Then, the welding torch (7) of each electrogas welding device (1) is controlled to move upward while weaving according to the cross-sectional shape of the groove space (2) based on a signal from the control device (8). A butt welding device for a thick steel material, the movement of which is controlled by a device (8).