JP2931544B2 - Aluminum brazed honeycomb panel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aluminum brazed honeycomb panel, and more particularly, to a honeycomb core having a honeycomb core disposed between upper and lower plates, and having a frame formed of an aluminum shape or the like at a peripheral portion or a peripheral portion and a panel intermediate portion. The present invention relates to an improvement in bondability of an aluminum brazed honeycomb panel which is disposed and integrally brazed.

[0002]

2. Description of the Related Art As shown in FIG. 15, an aluminum brazed honeycomb panel has a peripheral portion of a honeycomb core 2 formed from a thin plate or foil of aluminum (including an aluminum alloy, the same applies hereinafter), and an intermediate portion as required. The frame members 4 and 4 made of an aluminum profile are disposed in the parts, and the face plates 3 and 3 made of an aluminum brazing sheet are placed on the upper and lower sides and fixed with a jig, and then charged into a brazing furnace to be integrally brazed. In the field of construction and vehicles such as automobiles, it is applied as a member requiring light weight and high specific rigidity.

[0003] In the aluminum brazed honeycomb panel 1, brazing is performed between the honeycomb core 2 and the honeycomb core 2, between the honeycomb core 2 and the face plate 3, between the honeycomb core 2 and the frame member 4, and between the honeycomb core 2 and the frame material 4. Between frame material 4 and frame material 4
And between the frame member 4 and the frame member 4. Particularly, the complete joining between the frame member 4 and the face plate 3, which are the strength members, and between the frame members 4 is a strength characteristic in using the honeycomb panel. It is extremely important in securing

However, since the face plate 3 is formed of a brazing sheet, a brazing material is interposed between the face plate 3 and the face plate 3 when the face material 3 is joined. When a gap is created between the contact surface of the face plate 3 and the frame member 4 due to the above, complete joining is not performed, and an unjoined portion occurs.
Since no brazing material is arranged on the joining surface between the frame members 4 and 4, the brazing is not performed, so that the aluminum brazing honeycomb panel has a minus surface in improving the strength of the entire honeycomb panel. Is desired.

[0005]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems in joining between a frame member and a face plate, which are particularly important in the strength of an aluminum brazed honeycomb panel, and in joining between a frame member and a frame member. The purpose of this is to complete the brazing by eliminating the unjoined parts between the frame material and the face plate and between the frame material and the frame material, and to improve the strength of the entire panel by aluminum brazing An object of the present invention is to provide a honeycomb panel.

[0006]

According to the present invention, there is provided an aluminum brazed honeycomb panel according to the present invention in which a honeycomb core is disposed between upper and lower plates, and a frame member is disposed at least on a peripheral edge of the honeycomb panel. In the aluminum brazed honeycomb panel to be brazed to, the bonding between the face plate and the frame material and / or the bonding between the frame materials are
The brazing sheet is formed by cladding a brazing material on both surfaces or one surface interposed on the joining surface, and the brazing sheet core material has a continuous piece or a discontinuous piece having a large number of penetrations in the brazing material on the joining surface, or a large number of pieces. The fact that it exists as a fragment is a fundamental feature of the configuration.

[0007] Further, a continuous piece or a discontinuous piece having a large number of penetrating portions, or a large number of divided pieces are formed by partial melting of a core material due to melting of a brazing material at the time of brazing. The second and third structural features that the brazing sheet to be interposed between the core material and the brazing sheet have through holes.
3 mm, a brazing sheet having a brazing material cladding ratio of 40 to 95% is interposed. The brazing sheet is a double-sided brazing material clad brazing sheet, and the brazing material cladding ratio of the brazing sheet is 40 to 9 on both sides.
The fourth and fifth structural features are that 5% and 20 to 50% are formed on one side.

In the present invention, as shown in FIGS. 1 and 2, a brazing sheet 5A is provided on the joint surface between the frame member 4 and the face plate 3.
Is used to perform brazing. The interposition of the brazing sheet 5A is particularly effective in the vicinity of the abutting portion between the frame members 4 and the frame member 4 and, if necessary, between the upper face plate and the frame material, between the lower face plate and the frame material, It can be appropriately interposed between the face plate and the frame material. As shown in FIGS. 1 and 2,
When a gap 10 is formed between the frame member 4 and the face plate 3, it is particularly important to interpose the brazing sheet 5A.

As shown in FIG. 3, a brazing sheet 5B is interposed between the joining surfaces of the frame members 4 to join them together. In use of the honeycomb panel, the brazing sheet 5A may be interposed only at the joint surface between the frame member 4 and the face plate 3 according to the required strength characteristics.
Although the brazing sheet 5B can be interposed only on the joint surface with the frame member 4, the frame member 4 and the face plate 3 and the frame member 4 and the frame member 4
Most preferably, brazing sheets 5A and 5B are interposed therebetween for brazing.

In the present invention, as the brazing sheet to be interposed between the joining surfaces, as shown in FIG. 4, a brazing material 7 having a high cladding ratio and a core material 6 having a certain thickness or less is preferable. By using the brazing sheet 5 of FIG. 5, the molten brazing material 7 partially melts the core material 6 at the time of heating and joining the joining surfaces, and the core material 6
As shown in FIG. 6, a continuous piece or discontinuous piece 6A having a large number of penetration portions 8 or a large number of divided pieces 6B as shown in FIG.

This state is shown in a case where the brazing sheet 5A is interposed between the frame member 4 and the face plate 3 and the brazing sheet 5B is interposed between the frame member 4 and the frame member 4 to be heated and melted. For example, as shown in FIGS. 7 and 8, the core material 6 exists as a continuous piece or a discontinuous piece 6A having a large number of penetration portions 8 or a large number of divided pieces 6B in the melt-solidified brazing material 7. I have. By forming such a brazed portion on the joint surface, the brazing material permeates the entire gap to eliminate the unjoined portion, thereby obtaining a complete joined portion. When a brazing material plate is interposed in place of the brazing sheet, the molten brazing material flows under the influence of gravity and the capillary phenomenon, so that an unjoined portion where no brazing material remains after solidification is easily formed.

As the brazing sheet 5 to be interposed,
As shown in FIG. 9, the use of one having a large number of through-holes 9 can further improve the bondability. As the brazing sheet 5, either a brazing material clad on both surfaces or a brazing material clad on one surface can be used, and the thickness of the core material 6 is 0.03 to 0.3 mm and the brazing material is The cladding ratio of 40 to 9
5% is preferably used.

When the thickness of the core material is less than 0.03 mm or the clad ratio of the brazing material exceeds 95%, the amount of the brazing material is too large with respect to the core material.
As shown in FIG. 12, an unjoined portion 13 where no brazing material remains due to excessive melting and flow of the core material occurs. When the thickness of the core material exceeds 0.3 mm or when the clad ratio of the brazing material is less than 40%, the amount of the brazing material is too small with respect to the core material, and therefore, as shown in FIGS. When the brazing material 7 is melted, the brazing material 7 cannot penetrate the core material 6 and the core material 6 remains, and the flow of the brazing material 7 is hindered, and the unjoined portion 13 is formed.

When the brazing sheet 5 to be interposed is formed by cladding a brazing material on both surfaces, it is desirable that the brazing material cladding ratio be 40 to 95% on both surfaces and 20 to 50% on one surface. If the content exceeds 95% on both surfaces or exceeds 50% on one surface, the amount of the brazing material is too large, so that when the brazing material is melted, the core material excessively dissolves and flows, and as shown in FIGS. If the clad ratio of the brazing material is less than 40% on both surfaces or less than 20% on one surface, the amount of the brazing material is too small relative to the core material. It is difficult to form, and an unbonded portion occurs as shown in FIG.

[0015]

According to the present invention, in an aluminum brazed honeycomb panel, at the time of assembling, a brazing sheet is interposed with a brazing sheet at a joining surface between a frame member and a face plate, and a joining member between the frame members, and melted when heated. By partially melting the core material of the brazing sheet, the molten brazing material partially penetrates the core material, so that the core material does not become resistant to the flow of the molten brazing material, and the brazing material easily penetrates the entire gap. As a result, a complete joint without any unjoined portions is formed, and the brazing portion of the joint surface after solidification is a continuous piece or a discontinuous piece in which the brazing sheet core has a large number of penetrations in the brazing material, Or, it exists as a number of minute fragments.

[0016]

Hereinafter, examples of the present invention will be described in comparison with comparative examples. Example 1 As shown in FIGS. 1 and 2, two rectangular tubular aluminum members 4, 4 (material: JIS 6N01 alloy, dimensions: 30 mm long, horizontal
30 mm, length 150 mm, and thickness 3 mm) are intentionally butted with a step so that the hatched portion 11 becomes a contact surface, and a face plate (JIS BA11PC,
Single-side brazing material clad material, 1.0mm thickness, brazing material clad ratio
10%), brazing sheet (BS) with brazing material cladding ratio and core material thickness shown in Table 1 (single-side clad material is JIS BS11PC, double-sided clad material is JIS BA12P)
C) Assembled with 5A interposed and fixed with a jig.

The above test piece was heated to a temperature of 590 ° C. in a vacuum brazing furnace (degree of vacuum at 590 ° C .: 1.3 × 10 ⁻³ Pa) to obtain a sample.
The temperature was kept for 分 間 minutes, cooled to 550 ° C. in the furnace and taken out of the furnace. The joining state between the profile 4 and the face plate 3 in the test piece after brazing was observed by peeling off the contact surface 12 and also from a cross section perpendicular to the contact surface 12 to evaluate the jointability. Presence / absence of unjoined part and joining state (Fig. 7-
8, 10 to 14) are shown in Table 2. As shown in Table 2, in each of the joints according to the present invention, the core material was present as a number of pieces in the brazing material, and no unjoined portions were observed.

[0018]

[Table 1]

[0019]

[Table 2]

COMPARATIVE EXAMPLE 1 Shaped materials having the same material, same shape and same dimensions as those of the first embodiment are intentionally butted with a step as in the first embodiment.
The same face plate as in Example 1 is placed on the upper and lower sides, and a brazing sheet 5B made of the same material as in Example 1 having the brazing material cladding rate and the core material thickness shown in Table 3 is interposed between the profile and the face plate. And fixed with a jig. Next, these test pieces were vacuum brazed under the same conditions as in Example 1, and the bondability was evaluated in the same manner as in Example 1. Table 4 shows the evaluation results.

[0021]

[Table 3]

[0022]

[Table 4]

As shown in Table 4, when the cladding ratio of the brazing sheet to be interposed is too high or the thickness of the core material is too small, the amount of the brazing material is too large relative to the core material. Melting and flowing resulted in a portion where no brazing material remained, and an unjoined portion was formed. (Specimen Nos. 10, 11, 15, 17-19, 23, 25) If the brazing sheet interposed has too low a cladding ratio or too large a core material thickness, the amount of brazing material is small relative to the core material. As a result, the brazing material does not penetrate the core material, and the core material remains, resulting in an unjoined portion. (Specimen No. 12-14, 16, 20-
(22, 24) In addition, when only brazing material is interposed (specimen N
In o.26), the molten brazing material flows to form an unjoined portion.

Example 2 As shown in FIG. 3, two rectangular aluminum profiles 4
4 (Material: JIS 6N01 alloy, dimensions: length 30mm, width 30mm, length
150 mm, thickness 3 mm) butted so that the hatched portion 11 becomes the contact surface, and the brazing sheet (No. A to I) having the brazing material cladding ratio and the core material thickness shown in Table 1 at the butted portion.
(Single-sided clad material is JIS BA11PC, double-sided clad material is JIS
BA12PC) Assembled with 5B interposed and fixed with a jig.

The above test piece was heated to a temperature of 590 ° C. in a vacuum brazing furnace (degree of vacuum at 590 ° C .: 1.3 × 10 ⁻³ Pa) to obtain a sample.
The temperature was kept for 分 間 minutes, cooled to 550 ° C. in the furnace and taken out of the furnace. Example 1 By observing the joined state between the profiles 4 and 4 in the test piece after brazing by peeling off the contact surface 11 and also observing from a cross section perpendicular to the contact surface 11, Example 1 was performed.
The bondability was evaluated in the same manner as described above. Table 5 shows the evaluation results. As can be seen from Table 5, in each of the joints according to the present invention, the core material was present as a number of pieces in the brazing material, and no unjoined portions were observed.

[0026]

[Table 5]

Comparative Example 2 Aluminum alloy profiles of the same material, shape and dimensions as in Example 2 were butted in the same manner as in Example 2, and the butted portions had the brazing material cladding ratio and core material thickness shown in Table 2. Brazing sheet 5B of the same material as in the second embodiment
After fixing with a jig, vacuum brazing is performed under the same conditions as in Example 2, and the jointability of the profile on the test piece after brazing is evaluated in the same manner as in Example 2. did. Table 6 shows the evaluation results.

[0028]

[Table 6]

As shown in Table 6, when the clad ratio of the interposed brazing sheet is too high or the thickness of the core material is too small, the amount of the brazing material is too large relative to the core material. Melts and flows to form unbonded parts. (Specimens No. 36, 37, 41, 43 to 45, 49, 51) In the test piece No. 52 in which only the brazing material is interposed, an unjoined portion is formed by the flow of the brazing material. If the cladding ratio of the brazing sheet to be interposed is too low or the core material thickness is too large, the amount of brazing material is too small relative to the core material, so that the core material does not penetrate due to the molten brazing material, the core material remains, and the unbonded portion Has occurred. (Specimen No. 38-40, 42, 46-4
8, 50)

[0030]

As described above, according to the present invention, between the frame material and the face plate in the aluminum brazed honeycomb panel,
The brazing property between the frame members is improved, the strength of the honeycomb panel is enhanced, and the brazing failure is greatly reduced.

[Brief description of the drawings]

FIG. 1 is a partial perspective view showing a state in which a brazing sheet is interposed between a frame member and a face plate according to the present invention without a face plate.

FIG. 2 is a partial perspective view showing a state where a face plate is arranged in FIG.

FIG. 3 is a partial perspective view showing a state in which a brazing sheet is interposed between frame members in the present invention.

FIG. 4 is a partial sectional view of a brazing sheet interposed in the present invention.

FIG. 5 is a partial cross-sectional view showing an example of a state where the brazing sheet of FIG. 4 is melted.

FIG. 6 is a partial cross-sectional view showing another example of a state where the brazing sheet of FIG. 4 is melted.

FIG. 7 is a partial cross-sectional view showing a brazed state between the frame member and the face plate in the present invention.

FIG. 8 is a partial cross-sectional view showing a brazed state between frame members according to the present invention.

FIG. 9 is a perspective view showing another embodiment of a brazing sheet interposed in the present invention.

FIG. 10 is a partial cross-sectional view showing a brazed state between the frame member and the face plate.

FIG. 11 is a partial cross-sectional view showing another example of a brazing state between a frame member and a face plate.

FIG. 12 is a partial cross-sectional view showing a brazing state between the frame members.

FIG. 13 is a partial cross-sectional view showing another example of a brazing state between the frame members.

FIG. 14 is a partial cross-sectional view showing still another example of a brazing state between the frame members.

FIG. 15 is a partial perspective view of an aluminum brazed honeycomb panel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Aluminum brazed honeycomb panel 2 Honeycomb core 3 Face plate 4 Frame material 5 Brazing sheet 5A Brazing sheet 5B Brazing sheet 6 Core material 6A Continuous piece / Discontinuous piece 6B Segment 7 Brazing material 8 Through hole 9 Through hole 10 Gap 11 Joint surface 12 Joint surface 13 Unjoined part

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI // B23K 101: 02 (72) Inventor Hiroshi Irie 5-11-3 Shimbashi, Minato-ku, Tokyo Sumitomo Engineering Co., Ltd. (72) Inventor Yasunaga Ito 5-11-3 Shimbashi, Minato-ku, Tokyo Sumitomo Engineering Co., Ltd. (58) Field surveyed (Int.Cl. ⁶ , DB name) B32B 1/00-35 / 00 B21D 47/00 B23K 1/00-1/20 B23K 35/00-35/40

Claims (5)

(57) [Claims] 1. An aluminum brazed honeycomb panel in which a honeycomb core is disposed between upper and lower plates and a frame material is disposed on at least a peripheral portion thereof and is integrally brazed and joined. Alternatively, the joining between the frame members is performed by a brazing sheet clad with a brazing material on both sides or one surface interposed on the joining surface, and a brazing sheet core material having a large number of penetration portions in the brazing material on the joining surface. An aluminum brazed honeycomb panel characterized as being present as strips or discontinuous strips or as multiple pieces. 2. A continuous piece or a discontinuous piece having a large number of penetrating portions, or a large number of divided pieces are formed by partial melting of a core material by a molten brazing material at a joint surface. Item 2. An aluminum brazed panel according to Item 1. 3. The aluminum brazed honeycomb panel according to claim 1, wherein the brazing sheet interposed between the joining surfaces has a large number of through holes. 4. A core material having a thickness of 0.03 to 0.3 m on a joint surface.
m, a brazing sheet having a brazing material cladding ratio of 40 to 95% is interposed.
The described aluminum brazed honeycomb panel. 5. The brazing sheet is a double-sided brazing material clad brazing sheet, wherein the brazing material has a cladding ratio of 40 to 95% on both sides and 20 to 5 on one side.
5. The aluminum brazed honeycomb panel according to claim 4, wherein the honeycomb panel is formed at 0%.