JPH04135065A - Method for welding and joining h-shape steel to be welded and assembled - Google Patents

Abstract

PURPOSE:To absorb a dimensional error caused at the time of assembling H- shape steel and to easily adjust this by dividing a backing strip into two, tack- welding material to be welded to the H-shape steel and then, abutting and arranging these backing strips on the insides of flanges. CONSTITUTION:Working is carried out so that the tips 16a of grooves 16 formed on the flanges 12 and 12 of the H-shape steel to be welded and assembled are located below slightly from legs (a) of fillet welding of webs 10. This H-shape steel 14 to be welded and assembled and the member 18 to be joined are then abutted on each other and assembled together and the backing strips 20 and 20 are tack-welded respectively on the insides of the flanges 12 on both sides of the webs 10 of the H-shape steel 14 to be welded and assembled. The flanges 12 which are subjected to edge preparation are then welded to the material 18 to be joined and further, the member 18 to be joined, the webs 10 and 10, and the respective backing strips 20 and 20 are subjected to fillet wedding. Consequently, the dimensional error caused at the time of assembling the H- shape steel can be adjusted and besides, mutual, complete penetration of the members can be also attained.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for welding and joining an H-section steel and a member to be connected such as a column. The present invention relates to a welding and joining method that is suitably used when butting and welding a formed beam and a column.

[Prior art and issues to be solved]

Traditionally, the method of butting and welding together beams formed from welded H-beams and columns, etc. is to form arc-shaped scallops on the web of the H-beams and insert a backing metal into the scallops. The so-called scallop joining method, in which the grooved flanges are then joined by welding, is well known.

However, with this scallop joining method, not only is it troublesome to scallop the web, but the cross-sectional strength of the web decreases regardless of whether the scalloping is good or bad, so stress concentration occurs in the scalloped part, and the flange may break relatively early. In response to this problem, various so-called non-scallop joining methods have been developed, in which the shape of the backing metal is devised and the notch caused by scalloping in the web is eliminated, allowing welding to be performed without compromising the strength of the parts. It has been proposed and put into practical use.

By the way, in this type of non-scallop joining method, as shown in FIG. A backing metal 7 is used in which the back wall of the web 3 is configured in a shape that follows the notched surface (slanted surface, vertical surface, etc.) of the web 3. Cash 7
It is difficult to absorb dimensional errors that occur during assembly and welding of H-section steel because it is necessary to assemble it against a member to be joined such as a column with the backing metal 7 fitted. There were further issues that needed to be resolved, such as the fact that it was not possible to completely melt the parts together because there was a connecting part A that included the back wall.

[Means for solving the problem] Therefore, in the present invention, the tip of the groove formed on the flange of the welded H-section steel is processed so that it is located slightly below the leg length of the fillet weld of the web, and then this weld is The assembled H-section steel and the member to be connected are butted and assembled, backing metals are temporarily attached to the inside of the flanges on both sides of the web of the welded-assembled H-section steel, and then the grooved flange is welded to the member to be connected,
Furthermore, by fillet welding the connected parts and the web, and the web and each backing metal, it is possible to adjust the dimensional errors that occur during the assembly of the H-section steel, and also to achieve complete weld penetration between the parts. This is what I did.

Additionally, in this case, if a notch is formed at the edge of the true metal that is larger than the leg length of the fillet weld of the web, it will not only facilitate assembly, but also facilitate gas venting when performing gas shield welding. can be done reliably.

[Example] Next, regarding the method for welding and joining welded assembled H-section steel according to the present invention, please refer to the attached drawings for an example in which a beam material and a column formed by welded assembly H-section steel are butted and welded together. This will be explained in detail below.

That is, in the joining method according to the present invention, first, the web 10
Beam material 1 formed by fillet welding beam flange 12.12 to
The flange 12.12 of the abutting end at 4 is notched, for example, at an angle of about 35 degrees to form a bevel 16. In this case, the groove is processed so that the tip 16a of the groove 16 is located slightly below the leg length a of the fillet weld of the web 10 (see FIG. 1).

Next, after the beam material 14 and the column material 18, which is a member to be connected, are temporarily attached and assembled by spot welding or the like, backing metals 20.
20 are temporarily attached by spot welding or the like in the same manner as described above (see FIG. 2). In addition, each backing metal 20 has a notch 24 set at one side edge of a flat plate member 22 formed in a rectangular shape to be larger than the leg length a of fillet welding of the web 10 (see FIG. 3).

In the next step A, the butt surface of the pillar material 18 and the groove I of the flange 12
After filling the funnel-shaped group b formed by the tip 6 and the notches 24 and 24 of each backing metal 20, the groove 16 of the flange 12 and the abutting surface of the pillar material 18 are welded to connect the flange 12 and the pillar. Weld material 18 (see Figure 4)
.

In this case, since the groove tip 16a is located slightly below the leg length a of the fillet weld of the web 1o, it is possible to completely weld the members together. Since the leg length a of the web 10 is set to be larger than the fillet welding leg length a, a gap is formed between the web 10 and the groove part, and in the case of gas shield welding, gas venting can be carried out suitably. It is possible to reliably prevent the occurrence of welding defects such as.

After the welding of the flange 12 and the pillar material 18 is completed, the pillar material 18 and the web 1o, and the web 10 and each backing metal 2
0 and 0 in sequence (see Fig. 5).

〔Effect of the invention〕

As mentioned above, according to the method for welding and joining welded assembled H-section steel according to the present invention, after dividing the backing metal into two parts and temporarily attaching the members to be joined to the H-section steel, these backing metals are Since the stopper is placed in contact with the inside of the flange, dimensional errors that occur during assembly of the H-section steel can be absorbed and easily adjusted, making it possible to perform the joining work more efficiently.
Further, since there is no part corresponding to the connecting part A (FIG. 6) unlike the conventional backing metal, the members can be welded by completely melting each other, so that the reliability of the welding can be improved.

In addition, the notch of the backing metal is set larger than the leg length of the fillet weld of the web to create a gap between it and the groove of the web, so gas can be vented reliably even in cases such as gas shield welding. Therefore, it has various advantages such as being able to prevent welding defects from occurring.

Although the preferred embodiments of the welding method for welding assembled H-section steel according to the present invention have been described above, the present invention is not limited to these embodiments, and various modifications may be made without departing from the spirit of the present invention. Of course, changes can be made.

[Brief explanation of the drawing]

1 to 5 are process explanatory diagrams showing the welding procedure for welding a beam and a column as a method for welding and joining a welded assembled H-section steel according to the present invention, in particular, FIG. Figure 2 is an explanatory cross-sectional view taken along the m-m line to explain the relationship between the material and the backing metal, and Figure 6 is an explanatory view showing the relationship between the backing metal and H-beam steel used in the conventional non-scallop joining method. be.

Claims (2)

[Claims] (1) When welding and joining the welded H-section steel and the member to be connected, first make sure that the tip of the groove formed on the flange of the welded H-section steel is located slightly below the leg length of the fillet weld of the web. Next, assemble this welded H-section steel and the member to be connected, temporarily attach backing metals to the inside of the flanges on both sides of the web of the welded H-section steel, and then attach the beveled flange to the member to be connected. A method for welding and joining welded assembled H-beams, which comprises welding and then fillet welding a member to be connected to a web and a web to each backing metal. (2) The method for welding and joining welded assembled H-section steel according to claim 1, which comprises forming a notch on the edge of the backing metal that is set larger than the leg length of the fillet weld of the web.