JPS63152707A - Method of incorporating panel made of aluminum alloy - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Technical Field) The present invention relates to a method for assembling aluminum alloy panels,
In particular, it relates to a method for assembling aluminum alloy panels that can stably obtain a joint with high joint strength when joining and assembling aluminum alloy panels to aluminum alloy mounting members by welding. be.

(Prior art and its problems) Aluminum alloy materials, whose mechanical strength has traditionally been improved by adding certain alloying elements to pure aluminum, have properties such as excellent corrosion resistance, workability, and electrical conductivity. Due to its characteristics, it is widely used in equipment such as aircraft and vehicles, and as a structural material in buildings.

By the way, among such structural members made of aluminum alloy, a structural member such as a honeycomb sandwich panel, which has a panel form in which at least the joint surface is made of an aluminum alloy part, is coated with a predetermined aluminum alloy material at its edge. When assembling these two parts by joining them to the mounting member by welding, the wall thickness of the panel member is usually set on the mounting member side in order to improve the strength of the joint. Mounting flanges are integrally provided facing each other at a distance equivalent to , and a panel member is inserted between the mounting flanges, and the joining edges of the panel member are held between the mounting flanges. A structure similar to the incision/fitting structure of fittings has been adopted.

Then, with the joint end edge of the panel member inserted between the mounting flange parts of the mounting member, by welding the end edge of the remounting flange part and the panel member, both of them can be welded. This means that the materials will be joined.

By the way, when joining using such a method, in order to ensure ease of fitting the panel member between the mounting flanges, the inner surface of the mounting flange should be adjusted in consideration of manufacturing tolerances. A very small gap will be set between the panel member and the panel surface of the panel member inserted therein.

However, as mentioned above, these mounting members and panel members are welded only at the tip of the mounting flange, so even in their joined state, there is a gap between the inner surface of the mounting flange and the panel surface of the panel member. Therefore, when the two parts are assembled and a load is applied between them, stress will be generated in the part of the weld metal facing the small gap. As a result, cracks are likely to occur in the weld metal, resulting in problems in terms of joint strength.

In addition, as a welding method for such a panel member and a mounting flange portion, in order to obtain a cleaning effect on the oxide film at the joint site, T I using alternating current (AC) is usually used.
G (Tungsten Inert Gas Arc
) Welding or MIG using DC rod plus (D CRP)
(Metal Inert Gas Arc) welding will be adopted, but when using the conventional joining method as described above, the cleaning effect can be effectively exhibited in the deep part of the gap between the panel member and the flange.
Therefore, the fusion of the base metal at the base side of the flange portion of the weld metal is hindered, resulting in a problem that a good weld cannot be obtained.

Furthermore, when MIG welding is used as the welding method, burn-through occurs and molten metal enters the gap between the mounting flange and the panel member, resulting in poor performance. Therefore, it was not possible to stably obtain a suitable joint.

Therefore, if the penetration of the weld metal is uneven, local strengths and weaknesses will occur in the joint, making it difficult to select welding conditions and requiring a high level of skill to perform the work. It also had the problem that it required a lot of effort.

(Solution Means) Here, the present invention has been made against the background of the above-mentioned circumstances, and its gist is that the end portion of an aluminum alloy panel is attached to an aluminum alloy mounting member. By inserting it between two opposing mounting flanges and joining those flanges and the panel, when assembling the panel and the mounting member, the panel surface can be fixed on both sides of the panel. and the flange portion, a support portion extending along the edge of the panel is positioned at least on the base side of the flange portion, and the flange portion side and/or It is provided integrally on the panel side, and is supported between the two flanges with the panel sandwiched from both sides by the support portion, and the tip of the flange portion and the panel are connected by weld metal. The method for assembling an aluminum alloy panel is characterized in that the panel and the flange are joined by welding so that the end on the base side of the flange is located within the gap.

(Example) In order to clarify the present invention more specifically, examples of the present invention will be described below with reference to the drawings.

First, in FIG. 1(a), reference numeral 10 denotes an aluminum alloy panel, which is formed into a flat plate shape extending perpendicularly to the plane of the paper with a length that is long enough to form the joints at the ends.

Further, 12 is an aluminum alloy mounting member to which the panel 10 is joined and assembled.

This mounting member 12 has two opposing plate-shaped flange portions 14.14 at a portion where the panel 10 is joined, separated by a distance larger than the wall thickness of the panel 10 by a predetermined dimension. Direction (in the figure, perpendicular to the paper surface)
It is erected parallel to the

Moreover, on the opposing surface 16 of each flange portion 14,
The flange portion 14 has a first support portion 18 at its base end, and a second support portion 20 in the vicinity of its distal end, each protruding inward by a predetermined height.
are provided in parallel and integrally over the entire length in the joining direction. The protruding tip surfaces of the first and second support portions 18.20 are respectively parallel opposing clamping surfaces 22.24 having a width of approximately 100.degree. .24 is the distance between panel 1
It is set to be approximately the same as the wall thickness of 0. Note that the formation position of the second support portion 20 is not particularly limited;
Usually, the distance dl from the tip surface of the flange portion 14 is 0.
It will be set to about 5 to 50 votes.

When joining the panel 10 to the mounting member 12 having such a structure by welding and assembling both members, first, as shown in FIG. 1(b), As such, the panel 10 is fitted between the flange portions 14, 14 of the mounting member 12 at the joint portion thereof.

That is, by inserting the panel 10 between the flange portions 14, 14 of the mounting member 12 in this manner, the panel 10 is inserted between the panel surfaces 2 on both sides, as shown in the figure.
At 6.26, it is clamped by the clamping surfaces 22.24 of the first and second supports 18.20 provided on the flange part 14.

Further, between the panel surfaces 26 on both sides of the panel 10 and the inner surface of the flange portion 14, a closed space 28 is further provided between the first support portion 18 and the second support portion 20. A gap 30 of a predetermined thickness is provided at a portion closer to the tip of the flange portion 14 than the portion 18 .
are formed over the entire length in the joining direction.

Note that the thickness of this gap 30, that is, the size of h in FIG. The thickness is desirably set to 0.3 to 0.8 mm.

However, as will be described later, when the panel 10 is welded and joined at the tip of the flange portion 14, 0.11
If it is less than 211, the effect of the gap 30 may not be exhibited, whereas if it exceeds 211, welding work becomes difficult.

Then, as described above, the panel 10 is attached to the mounting member 12.
When inserted between the flange parts 14 and 14, as shown in FIG.
．． By welding the tip of the panel 14 to the panel 10, these two members are joined.

Here, the panel 10 and the flange part 14 to be welded are opposed to each other with a gap 30 of a predetermined thickness in between, as described above, and the base of the flange part 14 in the weld metal 32 is placed in the gap 30. Welding is performed so that the side ends are located, that is, so that the opening at the tip of the flange portion 14 of this gap 30 is covered with the weld metal 32.

In addition, when assembling the panel 10 and the mounting member 12 according to the method described above, a gap of a predetermined thickness is created between the rejoined portion of the panel 10 and the flange portion 14 that are joined by the weld metal 32. Since 30 is formed,
The cleaning effect can be effectively exerted even to the depths of the joint surfaces of both members, and a healthy joint can be obtained.

Moreover, between the two members joined by the weld metal 32,
Even after the bonding, a gap 30 still exists,
Since the base end of the flange portion of the weld metal 32 is located within the gap 30, concentration of stress in the weld metal 32 when a load is applied between the two members after joining can be effectively avoided. As a result, the occurrence of cracks, etc. can be effectively prevented, and as a result, the joint strength can be effectively improved.

Furthermore, even when MIG welding is adopted as the welding method, the second support part 20 effectively acts as a backing material, and the gap 30 formed between the panel 10 and the mounting flange part 12 Intrusion of the weld metal 32 into the space between the panel 10 and the mounting flange 14 can be effectively prevented, and therefore the range of appropriate welding conditions can be widened, resulting in a joint with a good welding condition. The department is open.

It can be obtained easily and stably. and,
Therefore, when welding, TIG welding or MIG welding,
It becomes possible to employ any of them without distinction, and the welding efficiency can be effectively improved.

Furthermore, in this embodiment, since the closed space 28 is provided between the first support part 18 and the second support part 20 of the flange part 14, when joining them,
It is also possible to provide an appropriate number of through holes in the flange portion 14 that communicate with the closed space 28, and fill the closed space 28 with adhesive through these through holes, thereby joining the two members. The strength will be further increased.

Incidentally, the panel 10 is made of BA21PC material with a thickness of 200 μm2 cell size: 3/4'' honeycomb structure, and on both sides of the core, a face plate of BA2IPC material with a thickness of 1 mm is brazed. A honeycomb sand inch panel with a fixed structure is used, while A is used as a mounting member.
A bonding test was conducted using an aluminum alloy extruded section made of 6NO1-T5 using the method according to this example. For such bonding tests, MIG welding using direct current rod plus (DCRP) was used, and electrode wires with a diameter of 1.2 mm were used.
Using taφ E-5356, welding current: 160A,
The welding was carried out under the following welding conditions: arc voltage = 18 cm, welding speed: 60 cpm. The dimensions of the members used in this bonding test are shown in FIG. 2 (in the figure, the unit of dimension is a dragon).

In addition, as a comparative example, as shown in FIG. 3, a similar test was conducted in the case where a similar aluminum alloy panel 34 and a mounting member 36 were used and these two members were joined by a conventional method. I did it. Note that the materials of the panel 34 and the mounting member 36 used in this comparative example, as well as the welding method and welding conditions, were set to be the same as those according to the method of the present embodiment described above. Further, the dimensions of the members used in the bonding test as this comparative example are shown in FIG.

After joining according to the method of this embodiment and the conventional method, the strength was measured when the panel was pulled in the direction of separating it from the mounting member (the left-right direction in FIGS. 2 and 3). As a result, for those joined using the method according to this example, the weight was 3500 kgf/
The bonding strength of 70 m was measured, and a value of 50 kgf/mu per unit length in the direction perpendicular to the plane of the paper was obtained, confirming that the bonding condition was extremely good.

On the other hand, in the comparative example joined by the conventional method, 161
Only 0kgf/70m of bonding strength was obtained, and even 23kgf/+n per unit length in the direction perpendicular to the plane of the paper.
L was not obtained, and cracks and poor fusion were observed in the weld metal.

By the way, the present invention can be implemented in various forms in addition to the above-mentioned form, and for example, FIG. 4 shows another form of the assembly method according to the present invention. . In addition, this figure shows a state corresponding to FIG. 1(C) in the above embodiment, in which an aluminum alloy panel is inserted into a mounting member and both members are joined by welding. Since the joining process is the same as that in the previous example, the explanation will be omitted in this example, and the same members as in the previous example are also
By assigning the same reference numerals as in the previous embodiment, a detailed explanation thereof will be omitted.

That is, in the mounting member 12 in this embodiment,
The second support part 20 is provided at the distal end of the flange part 14, and a gap 40 is formed between the second support part 20 and the first support part 18 provided at the proximal end of the flange part 14. It is formed as a shaped space. Note that this second support section 20
The width: d2 is not particularly limited, but
Usually, it is set to about 0.5 to 30 degrees. Also, gap 4
0 thickness: h is usually set to about 0.1 to 2 mm, preferably about 0.3 to 0.8 nm, according to the thickness of the gap 30 in the first embodiment. .

In this embodiment, when the panel 10 is inserted between the flange portions 14 and 14 having such a shape, the tip of the flange portion 14 and the panel 10 are
By melting and welding the second support part 20,
This joining is performed, and thereby the proximal end of the flange portion 14 of the weld metal 42 is positioned within the gap 40.

Therefore, even with the method in this embodiment as described above,
The same effects as those of the first embodiment can be effectively achieved, excellent joint strength can be stably obtained, and TIG welding or MIG welding can be adopted without distinction as the welding method. becomes possible.

Furthermore, in the two embodiments, the first and second support portions 18 provided on the flange portion 14 of the mounting member 12 are
．． 20 is provided to form a gap 30 of a predetermined thickness between these two members, or in addition to that, a closed space 28, and to firmly support the panel 10 with the mounting member 12. Therefore, as shown for example in FIG. Furthermore, it is also possible to provide it on both the panel 10 and the flange portion 14, and even with such a configuration, the effects of the present invention as described above can be effectively achieved. .

Further, in the first embodiment, the first support part 1
It is not necessarily necessary to provide a closed space 28 between the first and second support parts 8 and the second support part 20, and as shown in FIG. It is also possible to provide a supporting portion 44 such that the joining edge portion of the panel 10 is held between the supporting portion 44.

In addition, in FIGS. 5 and 6, the same reference numerals are given to the same members as in the first embodiment, and detailed explanation thereof will be omitted.

Although several embodiments of the present invention have been described in detail above, these are literal illustrations, and the present invention is not to be construed as being limited only to these specific examples.

For example, in the embodiment described above, the panel 10 has a plate-shaped joint, but the present invention can also be applied to a panel in which the joint has a bent shape. Of course, if the joint portion of the panel 10 is bent, the flange portion 14 of the mounting member 12 will also be formed in a bent shape in accordance with the bent shape.

In addition, in the embodiment, the support portions (22, 24, 4
4) was formed as the same member as the panel 34 or the flange portion 14, but by forming the supporting portion as a separate member and bonding it to the panel 34 or the flange portion 14, it can be integrated. It is also possible to provide it.

In addition, although not listed, the present invention can be implemented in embodiments with various changes, improvements, modifications, etc. based on the knowledge of those skilled in the art, and such embodiments can be implemented in accordance with the present invention. It goes without saying that any of these are included within the scope of the present invention as long as they do not depart from the spirit of the invention.

(Effects of the Invention) Therefore, according to the method of the present invention, the end of the weld metal that joins the panel and the mounting flange on the flange base side has a predetermined thickness formed between the panel and the mounting flange. Since it is located within the gap between the two members, even when a load is applied between the two members,
This concentration of stress in the weld metal can be effectively avoided, and the occurrence of cracks and the like can be effectively prevented, and as a result, the joint strength can be effectively improved.

Additionally, the gap formed between the panel and the mounting flange allows for TIG using AC or MI using DCRP.
The cleaning effect when performing G welding can be effectively exerted on the joint surfaces of both members,
Therefore, a sound weld can be obtained.

Furthermore, since such a gap can effectively prevent weld metal from penetrating deep between the two members to be joined,
TIG welding and MIG welding can be used interchangeably as welding methods, and even when MIG welding is used, it is possible to create a stable, uniform joint with excellent strength without requiring a high degree of skill. You can get it.

[Brief explanation of the drawing]

Figures 1 (a) to (c) are process diagrams showing an example of the method for assembling aluminum alloy panels according to the present invention, and Figure 2 is used to measure the joint strength when joined by this method. FIG. 3 is an explanatory diagram showing the dimensions of the test materials, and FIG. 3 shows the dimensions of the test materials used for bonding according to the conventional method, which is carried out as a comparative test for the measurement of bonding strength as shown in FIG. 2. It is an explanatory diagram. Moreover, FIGS. 4 to 6 respectively show other embodiments of the method for assembling aluminum alloy panels according to the present invention, as shown in FIG.
) is a process diagram corresponding to 10: Panel 12: Mounting member 14: Flange portion 16: Opposing surface 18: First support portion 20: Second support portion 22.24:
Clamping surface 26: Panel surface 28: Closed space 30.40: Gap 32.42: Weld metal 44: Support part Fig. 2 Fig. 3

Claims (1)

[Claims] By inserting the end of an aluminum alloy panel between two opposing mounting flanges provided on an aluminum alloy mounting member and joining the flanges and the panel, When assembling the panel and the mounting member, along the edges of the panel so that a predetermined gap is formed between the panel surface and the flange portion on both sides of the panel. An extending support part is located at least on the base side of the flange part and is integrally provided on the flange part side and/or the panel side, and the support part is provided between the two flange parts with the panel sandwiched from both sides by the support part. At the same time, the tip of the flange portion and the panel are welded such that the end of the weld metal on the base side of the flange portion is located within the gap, and the panel and flange portion are welded together. A method for assembling an aluminum alloy panel characterized by joining.