JPH0699531A - Aluminum alloy honeycomb-panel - Google Patents

Abstract

PURPOSE:To prevent a decrease in a strength due to softening of an aluminum alloy material caused by thermal influence at the time of welding without increasing a weight of an aluminum alloy honeycomb-panel. CONSTITUTION:An edging material 1 to be installed between two surface plates 2 and 3 or a core material 4 near the material 1 is formed of a material having natural aging characteristics. The materials 1 and 4 are used to recover a decrease in a strength due to thermal influence at the time of welding with the natural aging characteristics to obtain the strength. Thus, after welding, sufficient strength can be obtained without artificial aging, and hence the edging material can be reduced in weight and operating cost.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aluminum alloy honeycomb panel, and more particularly to an aluminum alloy honeycomb panel suitable for joining the panels or the panel and other members by welding.

[0002]

2. Description of the Related Art Conventionally, a honeycomb panel made of an aluminum alloy is known in which a core material is arranged between two face plates and they are joined by a brazing material. As a related thing, for example, Japanese Patent Publication No. 2-23267 can be cited. By the way, when such an aluminum alloy honeycomb panel is used as a structural member, the panels or other strength members and the panel must be bonded to each other, and a resin adhesive is used to bond them. There may be considered a method of doing so, a method of previously bonding a receiving member for receiving a fastening means such as a bolt, and a method of directly welding and joining the panel. For example, Japanese Patent Application Laid-Open No. 1-161313 is a related method for joining panels or panels and other members.
No. 3 or JP-A No. 63-172638.

[0003]

Among the above-mentioned prior arts, when the panel is joined with an adhesive, it is more difficult to secure the strength as compared with the welded structure, and the strength may decrease due to aging. Further, in the method in which the fastening means is provided in advance by bonding and the joining is performed by the fastening means such as bolts, since it is necessary to dig the panel down, there is a concern that the manufacturing time and labor or the number of parts may increase. Further, in the method of directly joining the panels by welding, there is a possibility that sufficient strength of the joining portion cannot be secured when the face plate or the core material is made thin to reduce the weight of the panel. In order to secure the strength of the welded joint,
It is conceivable that an edge member is provided at the joint and welding is performed via the edge member. However, in some cases, the edge members and the panel constituent members were softened by the welding heat and the strength of the joint could not be sufficiently secured. In order to solve such a problem, it is possible to sufficiently secure the plate thickness of the edging material or the dimension of the edging material itself from the weld end, but when considering the weight reduction of the panel itself, the structure is It is not a good idea because it increases the weight. It is also conceivable to recover the strength by performing an artificial aging treatment after completion of welding for the heat effect, but in order to artificially age a structure after welding, a furnace capable of housing the structure is required. Therefore, it is not realistic for large structures.

An object of the present invention is to solve the problems caused by softening during welding and to provide a lightweight aluminum alloy honeycomb panel suitable for joining by welding.

[0005]

The object is to arrange two face plates, a core material installed between the two face plates, and an edge of the core member between the two face plates. Made of edging material,
In an aluminum alloy honeycomb panel formed by joining these by brazing, at least the edge material of the face plate, the edge material and the core material is made of an aluminum alloy material having a natural aging property.

[0006]

[Function] Among the members constituting the panel, at least the edge material or the core material near the edge material that is affected by the heat of welding has the property of natural aging, so that the portion softened by the heat effect of welding gradually hardens. Since the strength is increased, it is not necessary to perform heat treatment or the like, and the strength close to that before welding can be obtained. Therefore, it is possible to reduce the weight by maintaining the strength by welding and reducing the plate thickness of each of the edge member itself or the panel constituent members such as the face plate and the core member.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described with reference to FIGS. In general, an aluminum alloy honeycomb panel is manufactured by brazing, so that its size is restricted by the size of the heating furnace. Therefore, in order to make a large structure, it is necessary to join a plurality of honeycomb panels. Welding is generally used as a joining means,
It is impossible to weld the core material in the honeycomb panel so as to have a continuous structure. Therefore, it is general that the edge members are brazed to the end portions of the honeycomb panel in advance and the edge members are welded to each other. Therefore, the joint portion formed by this edge member needs to have strength equal to or higher than that of the general portion other than the joint portion. However, the aluminum alloy material softens due to the heat effect during welding, and the strength decreases. For this reason, when determining the thickness of the edging material, it is necessary to consider in consideration of the strength decrease, and it is necessary to increase the plate thickness. This goes against the purpose of using a honeycomb material, which is to reduce the weight.

Therefore, in the honeycomb panel of one embodiment according to the present invention, a material having natural aging characteristics is used as a material for the edge material as shown in FIGS. 1 and 2. As a material having the property of natural aging, A7N01 (JI
S), A6N01 as a material that does not have the property of natural aging
(JIS) will be described as an example. That is, FIG. 1 and FIG.
In the reference numeral 1, 1 is an edge member made of the material A7N01, which has a U-shaped cross section in the panel thickness direction. The edge member 1 is arranged between the face plates 2 and 3 made of A6N01 and joined by the brazing agent clad to the face plates 2 and 3. Further, a core member 4 is arranged between the face plates 2 and 3, and the face plates 2 and 3 are formed by the brazing agent like the edge member 1.
To be joined to. The core material 4 is a ribbon-shaped plate material 4a, 4b.
Is formed so as to be bent in a corrugated shape and partially joined to form a honeycomb-shaped hole, and the axial direction of the hole is arranged in the thickness direction of the panel. The plate member 4a in contact with the edge member 1 is made of A7N01 similar to the edge member 1, and the adjacent plate member 4b made of A6N01.
It is joined by brazing. In addition, the plate material 4a
Is joined to the edge member 1 by brazing,
The plate thickness is thicker than the plate material 4b.

A6N01 which does not have the characteristics of natural aging
Table 1 shows the strengths of the base material and the heat-affected zone of A7N01 having the characteristics of natural aging.

[0010]

[Table 1]

The strength of A7N01 is reduced by heat after welding, but the strength is recovered by natural aging for about one month.
Therefore, when the width W of the edging material 1 is the same, the plate thickness t is different for each material as shown in Table 2 in order to obtain the same strength.

[0012]

[Table 2]

As described above, by constructing the edging material 1 of A7NO1, the strength deterioration of the welded portion can be recovered by the natural aging characteristic of the material itself, so that the same strength is secured and the edging material 1 of the edging material 1 is secured. The plate thickness of each part can be reduced, and the weight can be reduced.

Further, as shown in FIG. 1, since the core material 4a in the row in contact with the edge material 1 is also made of AS7N01 having natural aging characteristics, the strength is high even if the heat effect reaches the core material 4 side. Since the width can be recovered, the width W of the edge material 1 can be shortened and the plate thickness t
The thickness can be made thinner, and the weight can be further reduced.

By the way, the range of using a material having a natural aging property for the core material is not limited to one row on the edge material side, but two or more rows.
Alternatively, all the core materials may be used. Further, as a means for avoiding the strength reduction due to the heat effect on the core material, a method of increasing the plate thickness t instead of changing the material can be considered.

Next, regarding the structure of the edging material in the direction perpendicular to the continuous direction of the wicking material, the edging material having such a width that heat influence does not reach the wicking material is shown in FIG. As described above, a structure in which a material having a natural aging property or a thick material is joined to the end of the core material is conceivable. That is, in FIG. 3, the same reference numerals as those used in the above-mentioned embodiment denote the same members. Reference numeral 4c is a plate material constituting the core material, and is a plate material made of A7N01 arranged at the contact portion of the edge portion of the plate material in the longitudinal direction with the edge material 1. The plate material 4c is joined to an end of a plate material 4d made of A6N01. The plate material 4c is thicker than the plate material 4d.

According to such a structure, the influence of welding heat on the edge material 1 is transmitted to the core material, that is, the plate material 4c, and the plate material 4c.
Since the strength is recovered by natural aging even when the steel is softened, the strength can be secured, and the plate thickness can be reduced to reduce the weight.

By the way, in each of the above-mentioned embodiments, the structure in which a part of the core material is made of the material having the natural aging property has been described, but it is conceivable that all the core materials are made of the material having the natural aging property. Further, the face plate may be made of a material having natural aging characteristics.

[0019]

According to the present invention, since strength reduction due to the heat effect due to welding can be avoided, the plate thickness and width of the edging material can be made thin, and the weight can be reduced. Further, as compared with the method of recovering the strength by artificial aging, the facility for artificial aging is not required and the labor for the work is not required, which is extremely advantageous in terms of cost.

[Brief description of drawings]

FIG. 1 is a panel thickness direction sectional view showing an embodiment of an aluminum alloy honeycomb panel according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view of the same position as in FIG. 2, showing another embodiment of the aluminum alloy honeycomb panel according to the present invention.

[Explanation of symbols]

1 ... Edge material, 2, 3 ... Face plate, 4 ... Core material, 4a, 4b ... Plate material.

Claims (2)

[Claims] 1. A face plate comprising two sheets, a core member installed between the two face plates, and an edge member arranged at an edge of the core member between the two face plates. In an aluminum alloy honeycomb panel that is joined and formed by brazing, at least the edge material among the face plate, the edge material and the core material is made of an aluminum alloy material having a natural aging property, the aluminum alloy honeycomb. panel. 2. The aluminum alloy honeycomb panel according to claim 1, wherein a portion of the core material near the edge material is made of an aluminum alloy material having a natural aging property. panel.