JPH0686006B2 - Welding Assembling Method for Welding H-Shaped Steel - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding method for joining an H-section steel and a member to be connected such as a column, and more specifically, a beam member and a column formed by the assembled H-section steel are butted against each other. The present invention relates to a welding and joining method that is preferably used when performing welding and joining.

[0002]

PRIOR ART AND PROBLEMS TO BE SOLVED BY THE INVENTION Conventionally,
Welding assembly A method of butt-welding beams and columns formed of H-shaped steel by welding is to form an arcuate scallop on the web of H-shaped steel, insert a backing metal into this scallop, and then groove-process. There is known a scallop joining method in which welded flanges are joined.

However, in this scallop joining method, not only is scalloping of the web troublesome, but
Regardless of whether the scalloping is good or bad, the cross-sectional strength of the web decreases, so that stress concentration occurs in the scalloped portion, and there is a disadvantage that the flange breaks relatively early.

Under these circumstances, various so-called non-scalloped joining methods have been proposed in which the shape of the backing metal is devised and the notch due to the scallops on the web is eliminated so that the welding can be performed without impairing the yield strength of the members. ing.

That is, this non-scallop joining method is
A welded assembly H-section steel consisting of a flange and a web having a groove formed at its joint end and a member to be connected are assembled, and a backing metal is temporarily attached inside the flanges on both sides of the web of the welded assembly H-section steel. A groove is machined and welded to a member to be connected, and the member to be connected and the web and the web and each backing metal are fillet-welded to weld and join the welded H-section steel to the member to be connected. .

However, since the insides of the flanges on both sides of the web are fillet welded to their joint ends, not only is the work of temporarily attaching the backing metal troublesome, but the webs are also made using the temporarily attached backing metal. It has been pointed out that a problem to be solved that the workability is poor because the groove portion formed by the groove formed in the flange and the connected member is narrow even when welded to the connected member.

[0007]

SUMMARY OF THE INVENTION In view of the above, according to the present invention, the provisional welding or fillet welding in an H-shaped steel, in which a flange and a web are preassembled, is made to a position slightly separated from the joint end portion thereof, and is formed on the flange. Process the tip so that it is slightly separated from the joint end of the web,
Next, the welded assembled H-section steel and the connected member are assembled, and the backing metal is temporarily attached to the non-welded portions inside the flange on both sides of the web of the welded assembly H-section steel, and then the flange processed by the groove is connected to the connected member. It is intended to facilitate the temporary attaching work of the backing metal by adopting a procedure in which the connecting member and the web and the web and the backing metal are welded to each other by fillet welding.

Further, in this case, if the lower part of the surface of the backing metal opposite to the tack welding or fillet welding of the web is obliquely cut off, the workability of the fillet welding of the web and the backing metal is improved. This can be improved, and the lower part of the surface of the backing metal web facing the tack welding or fillet welding is cut off obliquely and the ridge portion continuous to this cutting surface and the surface facing the connected member is cut off. If the escape portion is formed, the workability of fillet welding between the member to be connected and the web can be improved.

[0009]

According to the present invention, since the backing metal is temporarily attached to the non-welded portion on the inner side of the flange on both sides of the web of the welded H-section steel, the work of temporarily attaching each backing metal can be performed simply and reliably. Further, not only the welding of the groove formed on the flange and the connected member but also the workability of fillet welding of the connected member with the web and the backing metal is improved.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the welding and joining method for welding H-section steel according to the present invention will be described with reference to the accompanying drawings regarding an embodiment in which a beam and a column assembled and formed into an H shape are butt-welded together. However, a detailed description will be given below.

That is, in the joining method according to the present invention, first, a beam member 14 formed by fillet-welding the beam flanges 12 and 12 to the web 10 is prepared. In this case, the fillet weld A on the beam 14 is slightly larger than the width W of the backing metal 20 attached to the position where the fillet weld A is attached to the inside of the flange 12, as described later. The non-welded portion X is provided up to the position. Although the beam member 14 formed by fillet welding is used in the present embodiment, the beam member is formed by temporarily welding the beam flanges 12 and 12 to the web 10 (tuck weld). Beam material 1
It goes without saying that 4 may be used.

Then, the flanges 12, 12 at the butt ends of the beam member 14 are cut out at an angle of, for example, about 35 degrees to form a groove 16. In this case, the tip 16a of the groove 16 is processed so that the tip 16a is located at a position slightly separated from the joining end 10a of the web 10 (see FIG. 1).

Next, after the beam member 14 and the column member 18 which is the member to be connected are temporarily attached by spot welding or the like, and then assembled,
The backing plates 20, 20 are temporarily attached to the non-welded portions X inside the flanges 12 on both sides of the web 10 of the beam member 14 by spot welding or the like as described above (see FIG. 2). in this case,
Since each backing plate 20 may be temporarily attached to the non-welded portion X inside the flange 12, the provisional attaching work can be easily performed.

Further, in this case, each backing plate 20 is obliquely cut downward while leaving a surface contact portion 24 with the web 10 on a surface of the rectangular flat plate member 22 facing the web. The backing metal configured by doing is used (see FIG. 3).

Next, the flange 12 and the column member 18 are welded together by welding the abutting surface of the column member 18, the tip of the groove 16 of the flange 12 and the groove b formed by the upper surface 20a of each backing plate 20. Weld (see FIG. 4). At this time, since the groove b has an inverted trapezoidal cross section, there is no problem in terms of workability.

In this way, the flange 12 and the pillar member 18 are
After the welding with the above is completed, the pillar material 18 and the web 10 are fillet-welded and the web 10 and each backing metal 20 are sequentially fillet-welded to thereby connect the beam material as the welded H-section steel to the beam material to be connected. Welding and joining the pillar material as a member is completed (Fig. 5).
a and FIG. 5b). In addition, web 10 and back deposit 20
For fillet welding with the
Since the surface contacting portion 24 with is provided, it is possible to prevent the occurrence of welding defects due to blow-through, etc. Therefore, it is possible to improve the workability.

Further, in this case, as a backing metal, as shown in FIG. 6, the flat plate member 22 formed in a rectangular shape is downwardly left with a surface contact portion 24 with the web 10 left on the surface facing the web. If the backing metal 30 is used, in which the ridge portion 26 continuous with the cut surface and the surface facing the pillar member 18 is cut to form a relief portion 28, the pillar member 18 is used.
Since the welding rod C can be easily inserted into the clave formed by the web 10 and the cut surface of the backing metal 30, the workability can be further improved.

[0018]

As described above, according to the welding and joining method for welding and assembling H-section steel according to the present invention, the backing metal divided into two parts is provided inside the flange on both sides of the web of the welding and assembling H-section steel. Since it is temporarily attached to the non-welded portion, that is, the portion having no obstacle, the temporary attaching work can be performed easily and reliably.

Further, even in fillet welding of the web and the backing metal, since the backing metal is provided with the surface contact portion with the web, it is possible to prevent the occurrence of welding defects due to blow-through and the like. When the escape metal is provided with the escape portion, the welding rod can be easily inserted, so that the workability can be further improved and various advantages are obtained.

Although the preferred embodiment of the method for welding and joining the H-section welded assembly according to the present invention has been described above, the present invention is not limited to this embodiment. For example, the ridge portion of the backing metal is provided. It goes without saying that various modifications can be made within the range not departing from the spirit of the present invention, such as changing the inclination and size of the relief portion formed by cutting out the material as desired.

[Brief description of drawings]

FIG. 1 is a side view of a beam in the case where a beam material as an H-shaped welded assembly and a column as a connected member are butted and welded to each other.

FIG. 2 is a side view showing a state in which a column member is temporarily attached to the beam member shown in FIG. 1 and then assembled, and then a backing metal is temporarily attached to the inside of the flanges on both sides of the web of the beam member.

FIG. 3 is a partially omitted perspective view showing the relationship between the backing plate, the beam member, and the column member shown in FIG.

FIG. 4 is a side view illustrating a state in which the groove of the flange and the abutting surface of the pillar are welded to each other in the beam member.

FIG. 5 is an explanatory diagram of a state where welding and joining of a beam member and a column member are completed, a is a side explanatory diagram, and b is a sectional explanatory diagram.

FIG. 6 is a partially omitted perspective view showing another embodiment of the backing metal shown in FIG. 2 and a relationship between a beam member and a column member in an inverted state.

[Explanation of symbols]

10 web, 12 beam flange, 14 beam, 16 groove, 18 column, 20
Back metal, 22 flat plate member, 24 surface contact part, 2
6 ridges, 28 reliefs, 30 back metal,

Claims (3)

[Claims] 1. When welding an H-section steel assembled by welding a flange and a web in advance and a member to be connected, a tack welding or a fillet weld in the welded H-section steel is slightly separated from its joint end. Up to the position and the tip of the groove formed on the flange is processed so as to be at a position slightly separated from the joint end of the web, and then this welded assembly H-section steel and connected member are assembled, and welding assembly H-type Temporarily attach backing metal to the non-welded parts inside the flange on both sides of the steel web, then weld the grooved flange to the connected member, and further connect the connected member and the web and the web and each backing metal. A method for welding and assembling welded H-section steel, which is characterized by performing fillet welding. 2. The method according to claim 1, wherein the lower portion of the surface of the backing metal web facing the tack welding or fillet welding is cut obliquely. 3. The lower part of the surface of the backing metal web facing the tack welding or fillet welding is obliquely cut, and a ridge portion continuous to the cut surface and the surface facing the connected member is cut. The welding and joining method for welded H-section steel according to claim 1, further comprising forming a relief portion.