JPH0555229B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to an improvement in a method for welding reinforcing members.

Prior Art Conventionally, when reinforcing a structure having two adjacent surfaces forming a predetermined angle to each other, a reinforcing member and a structure are positioned on the two surfaces at right angles to each other. It is known to weld a reinforcing member to a structure by forming a weld bead at the corner of the structure. In such a reinforcing member welding method, the toe of the weld bead is usually positioned approximately at the end of the corner.

Problems to be solved by the invention However, when using the structure,
Normally, stress is concentrated near the edge of the corner, so there may be weld defects such as undercuts at the toe of the weld bead, or the flank angle of the toe (the angle between the toe and the structure). When the angle) is relatively small, stress tends to concentrate at the toe of the weld bead, resulting in a problem in that the strength of the structure is significantly reduced and it becomes easily damaged.

Means for Solving the Problems The present invention has been made against the background of the above-mentioned circumstances, and its gist is to provide a structure having two adjacent surfaces forming a predetermined angle to each other. , when forming a weld bead at the corner between the structure and the reinforcing member, the structure The weld bead is continuously formed on the surface of the body that is located on the extension line of the corner following the end of the corner, and the toe of the weld bead is the end of the corner. The purpose is to keep the area a predetermined distance away from the area.

Operation and Effects of the Invention In this way, a weld bead is continuously formed on a predetermined length portion of the surface of the structure that follows the end of the partition and is located on an extension of the corner thereof. As a result, the toe of the weld bead is located at a predetermined distance from the edge of the corner where stress is concentrated, so even if there is a welding defect at the toe of the weld bead, for example, The stress at the toe will be relatively reduced. Thereby, the strength of the structure can be further improved compared to the conventional structure, and damage thereof can be effectively suppressed.

Moreover, since it is sufficient to simply extend and form the weld bead from the end of the corner, control becomes complicated when a welding robot is used, or the welding results vary depending on the operator when welding by hand. There is an advantage that the above effects can be obtained without causing any problems.

Embodiment Hereinafter, an embodiment of the present invention will be described in detail based on the drawings.

FIG. 3 is a diagram showing an example of a structure and a reinforcing member welded by the method of the present invention. The L-shaped member 10 as a structure is integrally curved at a substantially right angle, and has two planar inner surfaces 12 and 14 that are adjacent to each other. On the other hand, the reinforcing member 16 has a triangular and plate-like shape, and the side surface in the thickness direction is the inner surface 1 of the reinforcing member 16.
2 and 14, respectively, and the reinforcing member 1
A pair of mutually adjacent side end surfaces of 6 are inner surfaces 12,
14, and are positioned approximately at the center of the L-shaped member 10 in the width direction.

Between the reinforcing member 16 and the L-shaped member 10 positioned in this way, there are corner portions 18 along the two sides of the reinforcing member 16 that come into contact with the L-shaped member 10 and on both sides of the reinforcing member 16 in the thickness direction. 20 (see FIG. 4), and when welding at least one side of the corners 18, 20, conventionally, as shown in FIG. Both ends of 18, that is, reinforcing member 1
The corners 24 and 26 of 6 were formed. For example, when a load P is applied in the direction of the arrow, and the L-shaped member 10 is not reinforced, the L-shaped member 10 has a stress distribution as shown in FIG. 5b.
However, when the reinforcing member 16 is welded to the L-shaped member 10 as described above, stress is generated at the tip of the corner 26 of the reinforcing member 16, as shown in FIG. concentrate. In this case, if there is a welding defect such as an undercut 30 or an overlap part 32 in the toe 28 of the weld bead 22, as shown in FIGS. 6 and 7, or as shown in FIG. In addition, when the flank angle θ of the toe 28 is relatively small (for example, an acute angle), the wall thickness of the L-shaped member 10 including the weld bead 22 changes rapidly, and the toe There was a problem in that the strength of the L-shaped member 10 at 28 was significantly reduced and the L-shaped member 10 became easily damaged.

On the other hand, according to this embodiment, as shown in FIG. 26 by a predetermined length L to form an extension 34, the toe 28 of the weld bead 22 extends a predetermined length from the tip of the corner 26 where stress is concentrated. They are located at a distance of L. Therefore, even if the toe 28 of the weld bead 22 has a welding defect as described above, the toe 28 of the weld bead 22
The stress at corner 2 is as shown in Figure 1b.
6, the strength of the L-shaped member 10 is further improved compared to the conventional one, and its damage is effectively suppressed. Furthermore, according to this embodiment, the welding bead 22 need only be formed by simply extending from the end of the corner 18, so that when a welding robot is used, the control of the welding robot does not become complicated. Moreover, in the case of manual welding, there is an advantage that the above effects can be obtained without causing much variation in welding results depending on the operator.

The two adjacent surfaces of the structure are not necessarily formed at substantially right angles, and at least one of the two surfaces is, for example, a curved inner surface 36 as shown in FIG. The side end surface of the reinforcing member 38 that is brought into contact with the surface 36 is the inner surface 36
It may be of a shape corresponding to the curved surface of .

Further, although the reinforcing members 16 have a triangular shape in the above-described embodiments, this is not necessarily necessary; for example, as shown in FIG. The inner surfaces 12 and 14 may be welded while the pair of side end surfaces 42 and 44 and the inner surfaces 12 and 14 are in contact with each other at a predetermined angle.

Further, in the above-mentioned embodiment, the integrally formed L-shaped member 10 is used as the structure, but for example, as shown in FIG. Welding may be performed using one or more reinforcing members 16 that are substantially similar to those in the previous embodiment.

Further, in the above-described embodiment, the extending portion 34 is continuously formed on the extension line of the corner 18 only on the one corner 26 side of the reinforcing member 16, but in addition, the extending portion 34 is continuously formed on the extension line of the corner 18. Welding may also be performed in the same manner.

In addition, it goes without saying that the present invention can be implemented in various modified forms without departing from the spirit thereof.

[Brief explanation of the drawing]

Fig. 1a is a side view showing a welded state of the reinforcing member shown in Fig. 3 and the structure, and Fig. 1b is a schematic diagram showing the stress distribution when a load is applied to the structure. It is. FIG. 2 is a diagram illustrating a main part of a cross section taken along the line (-) in FIG. 1a. FIG. 3 is a perspective view showing the positioned state of the reinforcing member and structure to be welded by the method of the present invention.
FIG. 4 is a diagram illustrating a main part of a cross section taken along the line - in FIG. 3. FIG. FIG. 5a is a diagram showing a reinforcing member welded to a structure by a conventional welding method, and corresponds to FIG. 1a. FIG. 5b shows the stress distribution of the structure when it is not reinforced. FIG. 5c is a diagram showing the stress distribution in FIG. 5a, and corresponds to FIG. 1b.
FIGS. 6 and 7 are diagrams for explaining welding defects at the toe of a weld bead, and are sectional views showing essential parts. FIG. 8 is a diagram for explaining the influence of the flank angle of the toe of the weld bead, and is a sectional view showing the main part. 9th
This figure corresponds to FIG. 3 and shows another example of a structure and a reinforcing member welded by the method of the present invention. FIG. 10 is a diagram showing another example of a reinforcing member welded by the method of the present invention, and corresponds to FIG. 1a. FIG. 11 is a view corresponding to FIG. 1a showing still another example of a structure and a reinforcing member welded by the method of the present invention. 10: L-shaped member (structure), [12, 36: inner surface, 14: inner surface] - (2 sides), 16, 38, 4
0: reinforcing member, 18, 20: corner, 22: welding bead, 46, 48: flat member (structure).

Claims (1)

[Claims] 1. In order to reinforce a structure having two adjacent surfaces at a predetermined angle to each other with reinforcing members positioned on the two surfaces at right angles to the two surfaces, When forming a weld bead at a corner between the reinforcing member, the weld bead is continuously formed on a portion of the surface of the structure that is located on an extension line of the corner following the end of the corner. A method of welding a reinforcing member, characterized in that the toe of the weld bead is separated from the end of the corner by a predetermined distance.