JPH04118291U - Backing metal for welding and welded joint structure of steel frame using it - Google Patents

Abstract

(57) [Summary] [Purpose] To ensure that butt joints such as the joints between column steel and beam steel are welded reliably without cracking while taking advantage of the advantages of the non-scallop construction method. [Structure] The end of the web 20 of the H-beam steel 2 is welded to the outer surface of the flange 10 of the steel column 1. In addition, the beam steel material 2
Each end of the flange 21 has a backing metal 4 on the back side.
is arranged, and the rounded end 40 of this backing metal 4
corresponds to the corner extending from the flange 21 of the beam steel material 2 to the web 20. Each end of the flange 21 of the beam steel material 2 is welded to the outer surface of the flange 10 of the column steel material 1 via the backing metal 4.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a backing metal used in welded joints such as at the ends of beams of construction steel frames. , regarding the structure of the welded connection.

0002

[Conventional technology]

Conventionally, as shown in FIG. Now, cutouts 3 called scallops are provided at the top and bottom of the web 20 of the steel beam 2. There is. This involves welding the end of the flange 21 of the beam steel material 2 to the flange 10 of the column steel material 1. When welding, ensure that weld lines are in front to avoid weld defects (do not cross weld lines). It is formed for the purpose of passing the backing metal 4 through the entire width in the width direction of the flange 21. There is.

0003 In addition, with the above-mentioned notch, the cross section of the web (steel beam) may be damaged. In order to improve this point, the strength and deformation capacity of the beam will be reduced. For this reason, as shown in FIG. There is something called. This is the end of the flange 21, as shown in FIGS. 9 to 11. A backing metal 4 cut from a flat plate is arranged on the back side of each part so as to sandwich the web 20. It is positioned like this. Welding is then performed across the entire width of the flange 21 in the width direction. . Note that 5 in the figure indicates a welding beat.

0004

[Problem that the idea aims to solve]

However, in the non-scallop construction method, as mentioned above, it is simply a flat plate. Since the cut backing metal is applied, as shown in FIG. 12, the web 2 Crack (beat crack) a in welding beat 5 corresponding to gap 6 between 0 and backing metal 4 There is a problem that this occurs as a welding defect. Therefore, in consideration of the above-mentioned circumstances, this invention has developed the advantages of the non-scallop construction method. The challenge is to take advantage of the To ensure that welding is performed at butt joints such as the joints between steel beams and steel beams. The purpose is to

[0005]

[Means to solve the problem]

The present invention was developed in consideration of the above-mentioned problems, and the flange at the welded end of H-section steel A backing metal placed on the back side of the end of the H-beam, which extends from the flange of the H-beam steel to the web. A welding device characterized by having a notch at the end corresponding to the corner where it spans. We provide backing metal to solve the above problems, and also provide support for flanges of steel materials such as for columns. The web end of H-shaped steel material for beams etc. is welded to the outer surface, and the flange of the H-shaped steel material is welded to the outer surface. At each end of the H-beam, have a notch in the corner extending from the flange to the web. The above-mentioned problem can be solved by welding through the backing metal of claim 1 whose two ends are made to correspond to each other. This is to eliminate the problem.

[0006]

[Effect]

In this invention, a notch is provided at the end of the backing metal corresponding to the corner of the H-shaped steel material. In other words, the top surface of the backing metal (facing the back surface of the H-shaped steel flange) There is no acute angle from the rollers) to the end face, so the corners of the H-shaped steel are almost right angles. In this case, there is an area between the end of the backing metal and the web that is actively opened on the welding side. This ensures that the welding material enters this area and connects the edge of the backing metal with the web. This prevents the creation of gaps in between which the welding material cannot fit. And the corner of the H-shaped steel round and the end of this backing metal if the end shape of the backing metal corresponds to this. This is also a gap between the edge of the backing metal and the web where the welding material cannot enter. You will no longer make .

[0007]

【Example】

Next, the present invention will be explained in detail based on the embodiments shown in FIGS. 1 to 6. In addition , parts whose configurations overlap with those of the conventional example shown in FIGS. 7 to 12 are given the same reference numerals and explained. omitted. Figure 1 shows the backing metal 4, which is used in the non-scallop construction method. For each of the backing metals 4, one end 40 has a round cut with a radius. A notch 41 is provided, and this rounded end 40 is inserted into the flange of the H-shaped steel material. It is used to correspond to the corners extending from the web to the web.

[0008] In other words, in the connection part of the steel material, as shown in FIGS. 2 and 3, the backing metal 4 Abut each end 40 against the web 20 with its curved surface facing the corner side. and placed on the back side of the end of the flange 21, and melted the end of the flange 21 in the width direction. come into contact with In this way, a notch is formed between the end 40 of the backing metal 4 and the corner side of the web 20. 41, a positively open part is formed on the welding side, and the welding material enters this part. This allows for reliable welding and creates a narrow gap that the welding material cannot fit into. Don't let it get to you.

[0009] In Figures 2 and 3, the beam steel 2 is shown as a welded H-shaped steel, but in Figures 4 and 5, As shown, the above-mentioned backing metal 4 can be used for rolled H-beam steel. i.e. web The end portion corresponds to the rounded shape of the fillet (corner) between 20 and flange 21. 40 can be placed in close contact with each other, and in this case, the backing metal 4 There is no gap between the corner side surface of the web 20 and the corner side surface of the web 20.

0010 The cutout 41 is not limited to the round shape described above, but may be of the shape shown in FIG. (a) and (b) that allow the formation of sloped surfaces, as well as those with stepped recesses. (c), and a concave curved surface (d). ), etc., and its shape can be set as appropriate. In the above example, one flange side of the H-beam steel is shown, but other Both have the same configuration.

0010

[Effect of the idea]

As explained above, according to the present invention, the backing metal is removed from the flange of the H-beam steel. A notch is provided at the end corresponding to the corner spanning the ebb, and this end of the backing metal with the flange ends corresponding to the corners of the H-shaped steel material, and Since it is welded to the outer surface of the steel flange, the backing metal and corners are difficult for welding material to enter. No gaps are formed, allowing reliable welding without causing cracks. It has excellent practical effects.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of the backing metal of the present invention.

FIG. 2 is an explanatory view showing the mounting state of the backing metal according to the present invention from the end surface side of the end of the H-shaped steel material.

FIG. 3 is an explanatory diagram showing the mounting state of the backing metal according to the present invention from the side of the end of the H-shaped steel material.

FIG. 4 is an explanatory view showing the mounting state of the backing metal according to the present invention from the end surface side of the end of the H-shaped steel material.

FIG. 5 is an explanatory diagram showing the mounting state of the backing metal according to the present invention from the side surface of the end of the H-shaped steel material.

FIG. 6 is an explanatory diagram showing another example of backing money.

FIG. 7 is an explanatory diagram showing a steel connection portion having a scallop in a conventional example.

FIG. 8 is an explanatory diagram illustrating a steel connection portion by a non-scallop construction method in a conventional example.

FIG. 9 is an explanatory view showing the end of a steel beam in the sura cup construction method from the side.

FIG. 10 is an explanatory view showing the end of a steel beam from the end face side in the same sura cup construction method.

FIG. 11 is an explanatory view showing the end of a steel beam in the same sura cup construction method from the outside of the flange.

FIG. 12 is an explanatory diagram showing cracks in a conventional example.

[Explanation of symbols]

1...Column steel material 2...Beam steel material 20...Web 21...Flange 4...Backing money 40...end part 41...Notch

──────────────────────────────────────────────── ─── Continuation of front page (72) Creator Shinichi Sakamoto Shimizu Ken, 2-16-1 Kyobashi, Chuo-ku, Tokyo Inside the company (72) Creator Tadao Nakagomi 1237-3-101 Hanasakicho, Nagano City, Nagano Prefecture (72) Creator Shigeru Nakayama 3-1-1 Higashikawasaki-cho, Chuo-ku, Kobe, Hyogo Prefecture No. Kawasaki Heavy Industries, Ltd. (72) Creator Shigetomo Matsui 3-1-1 Higashikawasaki-cho, Chuo-ku, Kobe, Hyogo Prefecture No. Kawasaki Heavy Industries, Ltd.

Claims (2)

[Scope of utility model registration request] 1. A backing metal placed on the back side of a flange end of a welded end of an H-shaped steel material, the backing metal having a notch provided at an end corresponding to a corner extending from the flange to the web of the H-shaped steel material. A backing metal for welding that is characterized by: 2. A web end of an H-beam steel material, such as one for a beam, is welded to the outer surface of a flange of a steel material, such as a column, and each of the flange ends of the H-beam steel material is connected from the flange of the H-beam steel material to the web. A welded joint structure of a steel frame, characterized in that the welding is performed via the backing metal according to claim 1, which has an end portion having a notch corresponding to a corner portion thereof.