JP2000052063A - Friction jointing method of honeycomb panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a friction jointing method of honeycomb panels for obtaining good jointing quality by removing a gap, excessive penetration of brazing materials, or strong oxidation film when honeycomb panels are butted. SOLUTION: When honeycomb panels 1 after brazing are friction jointed, jointing faces of frame members 4 of the honeycomb panels 1 are chamfered in advance and flattened to reduce the gap volume, and adhesive materials on the jointing faces 11 are removed at the same time. Thus, friction jointing of good jointing quality and good finishing can be obtained, and a large structural material can be manufactured with less man-hour, resulting in the low price.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for frictionally joining honeycomb panels for joining aluminum brazed honeycomb panels used for reducing the weight of various equipment, especially transportation equipment, to form a large-sized structure. About.

[0002]

2. Description of the Related Art Lightening of various equipments, especially transportation equipments, is being actively promoted in order to reduce fuel consumption and directly lead to environmental protection. The use of alloy materials is increasing.
Aluminum and its alloy materials are lightweight and have an optimal cross-sectional shape, for example, a rigidity can be increased by a two-sided structure, and they have excellent smoothness. It is suitable.

[0003] The two-sided structure includes a hollow extruded profile and a honeycomb panel. However, since the hollow extruded profile is manufactured by extruding an aluminum alloy, the width of the profile which can be formed is limited. You. On the other hand, for the honeycomb panel, the frame material is arranged on the peripheral portion of the honeycomb core of the core material, the face plates are arranged on the upper and lower surfaces of the honeycomb core, put in a brazing furnace in this state, and these are brazed as one piece Since it is manufactured, the width of the honeycomb panel that can be manufactured is limited by the size of the brazing furnace.

Therefore, when manufacturing a large-sized structure, joining of a hollow extruded shape member and a honeycomb panel is indispensable. Conventionally, the welding is performed by arc welding (TI
G, MIG) is applied, but there is a problem that the aluminum alloy material is deformed due to thermal distortion during welding.
In a part where the appearance is important, it is necessary to remove the extra height formed during arc welding. Furthermore, the strength is reduced due to the thermal influence around the welded portion due to the large heat input during welding, and the structure must be designed to be thick accordingly, reducing the light weight effect of the angle.

[0005] Vehicle structures include 6000 series (Al-M
g-Si) aluminum alloy extruded members are most often used. However, in the case of a normal 6000 series aluminum alloy, the heat affected zone (HA) is affected by heat input during arc welding.
Z) softens and greatly impairs the strength of the original extruded aluminum alloy. In addition, defects such as the occurrence of blowholes and solidification cracks specific to arc welding may occur, and the welding portion is repaired and re-welding is performed, which requires a lot of man-hours and deteriorates the appearance of the welded portion. There are drawbacks.

[0006] As a joining method with less heat input and less degree of softening and distortion, there has been proposed a method of butt friction joining of aluminum and its alloys. According to this method, when hollow extruded members or honeycomb panels are joined together,
Deformation of the joining portion is suppressed, and good joining can be obtained in a short time. In the honeycomb panel, the frame material and the face plate at the end of the honeycomb panel assembled by brazing are abutted to each other, and friction welding is performed along the abutting surface. By this method, a large-sized honeycomb panel can be manufactured.

[0007]

Although the two-sided structures made of aluminum and its alloys are joined by friction welding, various disadvantages caused by conventional arc welding can be solved. When the later honeycomb panels are abutted against each other, a gap may be formed. If the friction bonding is performed as it is, cracks or tunnel-like holes are generated, and the bonding quality is remarkably deteriorated.

The cause of the gap is presumed to be that the frame material is bent by thermal stress during brazing heating and cooling, and warpage is generated on the end face of the honeycomb panel. It is considered that dripping may occur. Further, a strong oxide film is formed on the surface of the aluminum material by brazing, and the oxide film may remain at a joint portion during friction joining and cause a crack.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described conventional problems in friction joining of brazed honeycomb panels, and an object of the present invention is to reduce a gap generated when butted honeycomb panels are joined to each other. Hold down as much as possible, remove wax dripping and strong oxide film, good bonding quality,
In addition, it is an object of the present invention to provide a method of frictionally joining a honeycomb panel, which can obtain a good-quality frictional joining.

[0010]

Means for Solving the Problems A friction bonding method for a honeycomb panel according to the present invention for achieving the above object is characterized by comprising the following constitution. That is, the invention of claim 1 is characterized in that, when the honeycomb panels after brazing are friction-joined to each other, the joining surfaces of the frame members of the honeycomb panels are flattened in advance and the attached matter is removed. I do. In this configuration, since the joining surface of the frame material is chamfered to reduce the amount of the gap and at the same time remove the deposits on the joining surface, good friction joining can be performed.

The invention according to claim 2 is characterized in that the joint surface of the frame material is chamfered until the unevenness thereof becomes at least 0.5 mm per joint surface length of 1 m. With this configuration, when the joining surfaces of the frame material are abutted, the unevenness is at least 0.5 mm or less per 1 m of the joining surface length. Therefore, even if the friction joining is performed in this state, the gap is small, so that good friction joining is achieved. it can.

According to a third aspect of the present invention, the frame material has a thickness in which a joint surface thereof is chamfered, and the thickness is 0.5 mm or more.
It is characterized by a range of 5 mm. In this configuration,
Even if beveling does not affect the strength of the frame material, and the thickness to be beveled is in the range of 0.5mm to 5mm, so it absorbs warpage and bending after brazing and the uneven surface length At least 0.5 mm per meter can be obtained, and good friction joining can be performed without affecting the strength of the frame material.

The invention according to a fourth aspect is characterized in that a thick portion is provided at a corner portion between both ends of the joint face plate of the frame material and a horizontal plate orthogonal to the both ends. In this configuration, even if the joining face plate and the horizontal plate of the frame material are thinned to the extent that they do not buckle, the formation of the thick portion does not cause deformation during friction joining or a defect in the joining portion.

The invention according to claim 5 is characterized in that the frame material is a channel, and the concave side of the channel faces outward. In this configuration, the facing is a side edge of the face plate and a side edge of the side plate of the channel, so that the two joints can be simultaneously friction-joined after butting.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to FIGS. FIG. 1 is a perspective view showing a form of a honeycomb panel to which the method of the present invention is applied, and FIG. 2 is a sectional view showing a state of manufacturing the honeycomb panel. Figure 1,
In FIG. 2, a honeycomb panel 1 has a frame 4 disposed on a peripheral portion 3 of a honeycomb core 2 as a core material, and face plates 5 and 5 disposed on upper and lower surfaces of the honeycomb core 2 and brazed in this state. And become one.

That is, in the case of an aluminum brazed honeycomb panel 1, a peripheral portion 3 of a honeycomb core 2 formed of a foil or a thin plate of aluminum (including an aluminum alloy, the same applies hereinafter) is formed of an extruded aluminum material. The frame member 4 is framed by welding, and the upper and lower surfaces P of the honeycomb core 2 are face plates 5 and 5 made of an aluminum brazing sheet so as to overlap the honeycomb core 2 and the frame member 4.
Are placed together in a brazing furnace with the jig fixed thereto, and brazing is performed integrally between the honeycomb core 2 and the face plates 5 and 5 and between the frame member 4 and the face plates 5 and 5. This is done by: In addition, the space between the honeycomb core 2 and the frame member 4 is also brazed by the brazing fluid flowing from the honeycomb core 2 and the face plates 5 and 5.

The honeycomb panel 1 configured as described above
In the heating and cooling of the brazing, the frame material 4 is bent and warped due to thermal stress, and as shown in FIG. 3, a step 10 is generated between the frame material 4 and the face plates 5 and 5, and the honeycomb panel 1
The joining surface 11 when joining them has an irregular shape. In addition, as shown in FIG.
There is a wax droop 12 that flows during brazing, the surface of which is usually covered with a strong oxide film. Even if the joining surfaces 11 of the honeycomb panel 1 in such a state are abutted to each other, a gap is full, and a strong oxide film remains even after frictional joining and causes cracks. As shown in FIG.
And strong oxide film is removed.

The ideal degree of chamfering is such that the joining surfaces 11 of the honeycomb panel 1 abut each other and there is no gap. However, the joining surfaces 11 of the honeycomb panel 1 abut each other and are pressed and restrained for frictional joining. In this case, as shown in FIG. 5, at the length α of the joining surface 11, a degree of facing which requires at least 0.5 mm of unevenness per meter is required. The fact that the unevenness is within 0.5 mm is based on many experiments, and within this range, there is no hindrance to frictional joining. If the unevenness exceeds 0.5 mm, there is a high possibility that trouble will occur in frictional joining.

As shown in FIG. 6, the honeycomb panel 1 whose surface has been cut has its joining surfaces 11 abutted against each other and is pressed and constrained by a jig (not shown). The hard pin 14 of the friction welding tool 13 is rotated at a high speed along the joining line, inserted into one end of the joining surface 11, and moved along the joining line to the other end to perform the friction joining. Then, the honeycomb panel 1
Is turned over, and the same frictional bonding is performed, the honeycomb panels 1 can be bonded to each other by the bonding portion 15 as shown in FIG.

However, since the above-mentioned chamfering is necessary until the unevenness per meter in the length α direction of the joining surface 11 is at least 0.5 mm or less, depending on the condition of the honeycomb panel 1 after brazing, For example, a case may occur in which the surface of the joining face plate 16 of the frame member 4 shown in FIG. 3 is considerably thinned. In such a case, when performing frictional joining by the friction joining tool 13, the strength of the frame member 4 may be insufficient, and buckling may occur.

For this reason, as shown in FIG. 8, the frame member 4 preferably has a thickness t at which the joint face plate 16 serving as the joint face 11 is chamfered, and the thickness t is 0.5 mm.
It is preferable to set the range to 5 mm. The joining surface is formed to have a thickness within this range, and by chamfering as shown by a two-dot chain line, warpage and bending after brazing are absorbed, and unevenness is reduced to at least 0.1 mm per 1 m of the length of the joining surface 11. It can be within 5 mm, and good friction joining can be performed without being affected by the strength of the frame member 4 (FIG. 9).

If the thickness t is less than 0.5 mm, it is difficult to make the unevenness less than 0.5 mm per 1 m of the length of the joint surface 11 even if the surface is cut. Conversely, if the thickness t exceeds 5 mm, the effect becomes saturated, the weight of the frame member 4 increases, and the advantage of the light weight of the honeycomb panel 1 decreases. In addition, in the process of manufacturing the honeycomb panel 1, brazing is performed. During heating, the surrounding temperature is unlikely to rise, making brazing difficult.

FIGS. 10 and 11 show a method of friction joining a honeycomb panel 1a having a thick portion 19 at a corner 18 between both ends of a joining face plate 16 of a frame member 4 and a horizontal plate 17 orthogonal thereto. It is. The thickness of the joining face plate 16 and the horizontal plate 17 can be reduced to such an extent that they do not buckle during friction joining, and the weight can be reduced. Therefore, when frictional joining is performed in this state, the corner portion 18 swells, and the appearance is as thick as the thick portion 19.
However, as a result, a shortage of material occurs at the joint portion 15 and a cavity or a crack is generated. The honeycomb panel 1a is provided with a thick portion 19 at the corner portion 18 so as not to cause deformation or a defect in the joint portion 15 during friction joining.

FIG. 12 shows a case in which a channel 21 is applied as a frame material instead of the square tubular frame material 4, and a method of friction joining a honeycomb panel 1b in which the concave portion 22 side of the channel 21 faces outward. It is shown. That is,
The channel 21 is provided with side plates 24, 24 at both ends of a back plate 23, so that the facing is performed on the side end of the face plate 5 and the side end of the side plate 24 of the channel 21.
If a is used, two joints can be simultaneously friction joined after the butting.

That is, the friction welding tool 13a is provided with disks 26 at both ends of a pin 25 having a length l ₁ (t ₁ ≒ l ₁ ) substantially equal to the thickness t ₁ of the face plate 5 and the side plate 24 of the channel 21. , 27 are fixed substantially parallel to each other to form a bobbin-type joint portion 28, and a bobbin-type joint portion 30 of the same configuration is attached via a shaft 29. In addition, the bobbin type joint 2
8 and the distance L ₁ between the 30, the distance between the two joint L ₂
be equivalent to.

The use of the friction welding tool 13a having the above structure eliminates the need for a backing jig as shown in FIG.
The thread-wound joints 28 and 30 are the honeycomb panels 1a and 1
a, the axial runout is eliminated, and the two joined portions of the honeycomb panel 1a can be friction-joined at the same time. Therefore, the honeycomb panel 1 can be operated by one operation.
b can be joined, and preparation before joining and post-joining processing can be performed only once.

An embodiment for confirming the effect of the present invention will be described below. Example 1 It has the cross-sectional shape shown in FIG. 3, the thickness of the face plate (material: 6N01) is 2.5 mm, and the thickness of the frame material (material: 6063) is 5 m.
m, width 40mm, panel height 100mm, panel length 3
000mm (joining length), honeycomb core (material: 6N0
The joined surface of the honeycomb panel after the brazing of 1) having a thickness of 0.3 mm and a cell size of 30 mm was subjected to a maximum of 1.5 mm surface grinding. The panel length of the honeycomb panel after brazing is 3
The bending of 000 mm was a maximum of 1.3 mm. (This measurement was performed by fixing the base material on a surface plate, scanning the chamfered surface over the entire length with a stylus type shape measuring device, and recording irregularities. ,went.).

When the joining surfaces of the two honeycomb panels are butt-pressed and restrained, the gap between the joining surfaces becomes 0.5 mm or less. In this state, the pin has a diameter of 5.0 mm and a length of 4.0 mm.
Friction welding was performed by rotating a friction welding tool having a diameter of 5 mm and a disk diameter of 10 mm at 1000 rpm and moving along a welding line at a feed speed of 300 mm / min. Then, it was turned upside down and the other side was similarly friction-welded. As a result, it was confirmed that there was no defect such as an error due to friction welding, no defect on the surface, and no defect inside by the transmission X-ray inspection.

COMPARATIVE EXAMPLE 1 The joined surfaces of the honeycomb panels after brazing obtained in Example 1 were abutted against each other and pressed and restrained. At this time, the gap between the joined surfaces was 2.2 mm at maximum. In this state, friction welding was carried out under the same conditions as in Example 1 without facing. As a result, it was confirmed that a groove-like defect was intermittently observed at the joint portion, and even at a portion having no defect on the surface, a lack of metal at the joint portion caused a tunnel-like defect.

[0030]

As described above in detail, according to the first aspect of the present invention, the amount of the gap can be reduced and the deposits on the joint surface can be removed by chamfering the joint surface of the frame material. And good frictional joining is possible. Therefore, there is no gap generated when the honeycomb panels after brazing are abutted with each other,
As a result of removing the sagging of the wax and the strong oxide film, it is possible to obtain a good joining quality and a good finished friction joining, so that a large structure can be manufactured with a small number of man-hours,
The price can be reduced.

According to the second aspect of the present invention, when the joining surfaces of the frame members are abutted, the unevenness is at least 0.5 mm or less per 1 m of the joining surface length, and the gap is small, so that good friction joining can be performed. Therefore, in addition to the above-mentioned effects, it is possible to eliminate unnecessary face milling and insufficient face milling.

According to the third aspect of the present invention, since the thickness to be chamfered is in the range of 0.5 mm to 5 mm, even if the surface is chamfered, the strength of the frame material is not affected, and warpage after brazing, By absorbing the bending, the unevenness can be made 0.5 mm per 1 m of the length of the joining surface, and good friction joining can be performed without affecting the strength of the frame material. Therefore, in addition to the effects described above, the weight can be reduced without affecting the strength of the frame material.

According to the fourth aspect of the present invention, even if the joining face plate and the horizontal plate of the frame material are thinned to the extent that they do not buckle, the thick portion does not cause deformation or defects in the joining portion during friction joining. . Therefore, in addition to the above-described effects, it is possible to achieve the most effective weight reduction by increasing the thickness of only necessary portions without affecting the strength of the frame material.

According to the fifth aspect of the present invention, the chamfering is performed on the side edge of the face plate and the side edge of the channel side plate.
Friction welding of several places can be performed simultaneously. Therefore, in addition to the above-described effects, friction welding can be performed simultaneously on the two face plates, so that the number of steps can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a form of a honeycomb panel to which the method of the present invention is applied.

FIG. 2 is a cross-sectional view illustrating a manufactured state of a honeycomb panel.

FIG. 3 is a cross-sectional view showing an embodiment of the method for frictionally joining a honeycomb panel of the present invention.

FIG. 4 is a side view showing a honeycomb panel after brazing to which the method of the present invention is applied.

FIG. 5 is a plan view showing an embodiment of the method for frictionally joining honeycomb panels of the present invention.

FIG. 6 is a cross-sectional view showing an embodiment of the method for friction-joining a honeycomb panel of the present invention.

FIG. 7 is a cross-sectional view showing a honeycomb panel manufactured by the method of the present invention.

FIG. 8 is a cross-sectional view showing an embodiment of the method for frictionally joining honeycomb panels of the present invention.

FIG. 9 is a cross-sectional view showing a honeycomb panel manufactured by the method of the present invention.

FIG. 10 is a cross-sectional view showing another embodiment of the method of friction-joining a honeycomb panel of the present invention.

FIG. 11 is a cross-sectional view showing a honeycomb panel manufactured by another method of the present invention.

FIG. 12 is a cross-sectional view showing another embodiment of the method for friction-joining a honeycomb panel of the present invention.

FIG. 13 is a perspective view showing a honeycomb panel in a manufactured state according to another method of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1a, 1b Honeycomb panel 2 Honeycomb core 3 Peripheral part 4 Frame material 5 Face plate 10 Step 11 Joining surface 12 Hanging 13, 13a Friction joining tool 14 Pin 15 Joining portion 16 Joining face plate 17 Horizontal plate 18 Corner portion 19 Thick portion 21 channel 22 concave portion 23 back plate 24 side plate 25 pin 26, 27 disk 28, 30 pincushion type joint 29 axis

Continued on the front page (72) Inventor Yasunaga Ito 5-11-3, Shimbashi, Minato-ku, Tokyo Sumitomo Light Metal Industries Co., Ltd. F-term (reference) 3J023 EA03 FA01 GA03 4E067 BB02 BG01 BG02 EC06 4F100 AB01A AB01B AB01C AB10 BA03 BA06 BA11 DB17 DC02 EJ271 GB31 JL03

Claims (5)

[Claims] 1. A honeycomb panel according to claim 1, wherein when the honeycomb panels after brazing are friction-joined to each other, a joining surface of a frame material of the honeycomb panel is preliminarily chamfered and flattened, and attached matter is removed. Friction joining method. 2. The method for friction-joining a honeycomb panel according to claim 1, wherein the joining surface of the frame material is chamfered until the unevenness is at least within 0.5 mm per 1 m of the joining surface length. . 3. The honeycomb panel according to claim 1, wherein the frame material has a thickness in which a joining surface thereof is chamfered, and the thickness is in a range of 0.5 mm to 5 mm. Friction joining method. 4. The honeycomb panel according to claim 1, wherein a thick portion is provided at both corners of the joining face plate of the frame material and a horizontal plate orthogonal to the both ends. Joining method. 5. The method according to claim 1, wherein the frame member is a channel, and a concave side of the channel faces outward.