JP2000329295A - Honeycomb panel assembly - Google Patents

Abstract

(57) [Problem] To provide a honeycomb panel joined body which has few defects and is easy to manufacture by applying friction stir welding to joining of honeycomb panels without eluting an adhesive. SOLUTION: A frame material 33 and a core 35 are sandwiched between face plates 31 and 32 and bonded with an epoxy adhesive. In the honeycomb panel 37 configured as described above, the frame material 33 has a thickness of 3T to 20T in the outer circumferential direction from the bonding portion with the face plates 31 and 32.
T (T is the thickness of the face plates 31 and 32) protrudes. Therefore, even if friction stir welding is performed by abutting the protruding portions of the frame member 33, the temperature-raising portion due to the friction stir welding does not reach the bonding portion (adhesive application portion), and the adhesive is eluted. Thus, the honeycomb panel 37 could be satisfactorily joined. Accordingly, the thus obtained honeycomb panel joined body has no defects such as blowholes, solidification cracks, and loose bolts, and is easy to manufacture.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a pair of face plates, a honeycomb core formed between the pair of face plates, and a frame member bonded between opposing edges of the pair of face plates.
TECHNICAL FIELD The present invention relates to a honeycomb panel joined body formed by joining a plurality of honeycomb panels each having a honeycomb panel.

[0002]

2. Description of the Related Art A pair of face plates, a honeycomb core (simply referred to as a core) formed between the pair of face plates, and a frame member bonded between opposing edges of the pair of face plates,
Honeycomb panels (e.g., aluminum sandwich panels) having a light weight and high rigidity have been widely used for building materials and the like. However, when multiple honeycomb panels of this type are used by bonding, the adhesive deteriorates at high temperatures.
It cannot be joined by welding because it elutes. Therefore, this type of honeycomb panel is joined by mechanical joining such as bolting, riveting, caulking, and creasing.

[0003]

However, in such a mechanical joining, the mechanism of the joining portion becomes complicated, and a large number of man-hours are required.
Problems such as rain juice coming out from the joint surface occur. On the other hand, in recent years, friction stir welding has been considered as a joining method with low heat input and a low degree of softening or distortion (for example, see Patent 27).
12838). In this method, a soft material such as an aluminum alloy is butted and restrained on a hard backing made of steel or the like, and a hard pin-type rotary tool is moved along the butted portion while rotating at a high speed. This method is characterized in that the joint does not melt, and the temperature of the joint does not rise so much.

In this friction stir welding, MIG, T
Unlike the case of welding such as IG, heat affected zone (HAZ)
Does not soften and greatly impair the original strength, and does not generate blowholes or solidification cracks. However, even in friction stir welding, the temperature in the vicinity of the joint may exceed 200 ° C., and in this case, there is a possibility that the adhesive melts out in the temperature-raising part where the temperature exceeds 200 ° C. and good joining cannot be performed. .

Accordingly, an object of the present invention is to provide a honeycomb panel joined body which has few defects and is easy to manufacture by applying friction stir welding to the joining of honeycomb panels without eluting the adhesive. .

[0006]

Means for Solving the Problems and Effects of the Invention The invention according to claim 1, which has been made to achieve the above object, comprises a pair of face plates, a honeycomb core formed between the pair of face plates, and the pair of face plates. And a frame member bonded between mutually opposing edges of the face plate of the above, a honeycomb panel joined body formed by joining a plurality of honeycomb panels, wherein the frame material is formed from a bonding portion with the face plate. Friction stir welding is provided by projecting 3T to 20T (T is the thickness of the face plate) in the outer peripheral direction, butting the projecting portions of the frame material with each other, and moving the rotary tool along the butted portion while rotating. And the honeycomb panel is joined,
It is characterized in that the temperature-raising portion by the friction stir welding is provided so as not to reach the bonding portion between the frame material and the face plate.

[0007] The applicant of the present application has made intensive studies on the application of friction stir welding to a honeycomb panel. As a result, it was found that when the distance between the joint by friction stir welding and the bonded portion of the frame member and the face plate is equal to or greater than a predetermined value, friction stir welding can be performed without eluting the adhesive. Therefore, in the present invention, the frame material of the honeycomb panel projects 3T to 20T (T is the thickness of the face plate) in the outer peripheral direction from the bonding portion with the face plate, and the projected portions of the frame material are abutted to each other to perform friction stir welding. Is going.

[0008] In this case, the honeycomb panel can be joined by friction stir welding without causing the adhesive to be eluted, because the temperature-raising portion due to the friction stir welding does not reach the bonding portion between the frame member and the face plate. Accordingly, the honeycomb panel joined body of the present invention has no defects such as blowholes, solidification cracks, and loose bolts, and is easy to manufacture.

If the amount of projection of the frame material is less than 3T,
In some cases, the adhesive in the vicinity of the joint melts due to the temperature rise due to the friction stir welding, and flows into the joint so that good friction stir welding cannot be performed. If the amount of protrusion of the frame member exceeds 20T, the portion occupied by the frame member becomes large, and the inherent lightness of the honeycomb panel is lost.

According to a second aspect of the present invention, in addition to the structure of the first aspect, one of the face plates of the frame member is provided so as to protrude further in the outer peripheral direction than the other face plate, and the ends of the protruding portions are connected to each other. Are friction stir welded, and a third member is provided between the frame members on the other face plate side of the frame material, and a butt portion between the third member and each of the frame materials is also provided. It is characterized in that the friction stir welding is performed, and the temperature-raising portion by the friction stir welding is also provided so as not to reach a bonding portion between the frame member and the face plate.

In the present invention, one of the face plates of the frame material (hereinafter, referred to as the frame plate).
(Provisionally lower) is provided so as to protrude further in the outer peripheral direction from the upper side, and the tips of the protruding portions are friction stir welded as described above. In addition, there is a third space between the upper sides of the frame material.
Is provided, and friction stir welding is also applied to the butted portion between the third member and each frame member. For this reason,
In the present invention, first, the lower sides of the frame material are friction stir welded together,
Subsequently, if a third member is erected and friction stir welding is performed on both ends of the third member and the upper side of each frame member, the joining of two adjacent honeycomb panels is completed. That is, in joining the two honeycomb panels, the friction stir welding can always be performed from the same side of the honeycomb panels, so that the above-described joining is extremely facilitated. Also, in the present invention, the frame material is 3T to 20T similarly to the first aspect of the present invention.
Since it protrudes, the temperature-raising portion formed by any of the friction stir welding does not reach the bonding portion between the frame member and the face plate. For this reason,
As in the first aspect, elution of the adhesive can be prevented.

[0012] Therefore, in the honeycomb panel joined body of the present invention, in addition to the effect of the first aspect of the invention, there is an effect that manufacturing is further facilitated. According to a third aspect of the present invention, in addition to the configuration of the second aspect, an engaging portion that engages when the third member is abutted against each of the frame members includes the third member and the frame members. And the engagement portion is formed in a direction in which the engagement is secured by a pressing force applied to the third member in the direction of the one face plate.

According to the present invention, the third member and each frame member are provided with an engagement portion which engages when the third member is brought into contact with each frame member. For this reason, the third member and the frame members on both sides thereof are held in a state where they abut against each other by the engagement of the engagement portion, and the friction stir welding can be performed more easily. Moreover, the engagement portion is formed in a direction in which the engagement is secured by a pressing force applied to the third member in the direction of the one face plate (that is, downward). For this reason, when the third member and the frame member are friction stir welded together, the above-mentioned engagement is secured by the force applied downward from the rotary tool to the third member, and the respective members are then butted against each other. The state can be maintained better.

Therefore, in the honeycomb panel joined body of the present invention, in addition to the effect of the second aspect of the present invention, there is an effect that the manufacture is further facilitated. According to a fourth aspect of the present invention, in addition to the configuration of the first aspect, the protruding portions of the frame member are abutted in parallel so that face plates of the respective honeycomb panels overlap, and the friction along the abutting portion is provided. It is characterized by being stirred and joined.

In the present invention, the projecting portions of the frame material are
The face plates of the respective honeycomb panels are butted in parallel so as to overlap with each other, and the friction stir welding is performed along the butted portions. Also in this case, since the protruding portion protrudes 3T to 20T from the bonding portion with the face plate, the heating portion by the friction stir welding does not reach the bonding portion between the frame member and the face plate. Similarly, elution of the adhesive can be prevented. Further, in the present invention, since the friction stir welding is performed by abutting the projecting portions in parallel as described above, a thick honeycomb panel joined body can be easily obtained.

Therefore, in the honeycomb panel joined body of the present invention, in addition to the effect of the first aspect of the present invention, there is an effect that a thick one can be easily manufactured. According to a fifth aspect of the present invention, in addition to the configuration according to any one of the first to fourth aspects, the surface of the joining portion formed by the friction stir welding is:
It is characterized by being putty as it is or after grinding, and then painted and smoothed.

For this reason, in the present invention, in addition to the effect of the invention described in any one of the first to fourth aspects, an effect that the surface of the joint is extremely smooth is generated.

[0018]

Next, an embodiment of the present invention will be described with reference to the drawings. The friction stir welding in the present embodiment refers to, as schematically shown in FIG. 1, abutting and restraining soft materials 10 and 20 such as an aluminum alloy, and rotating a hard rotary tool 28 at a high speed along the abutting portion. It is moved while moving.

FIG. 2 is a side view showing the structure of the rotary tool 28. As shown in FIG. As shown in FIG. 2, the rotary tool 28 is composed of a large-diameter shoulder 28a and a small-diameter pillar 28b protruding from the lower end of the shoulder 28a, and a driving force is transmitted from a driving system (not shown). As a result, it rotates around the central axis of the column 28b and moves along the abutting portion of the soft materials 10 and 20. Then, as shown in FIG. 1, a joining portion 30 is formed at the butted portion where the metal constituting the soft material 10 and the metal constituting the soft material 20 are agitated and joined by the columns 28 b. Further, on the soft materials 10 and 20 outside the joint 30, there are formed heating portions 10 a and 20 a, respectively, which are heated by the heat generated by the stirring.

When the soft materials 10 and 20 constitute the frame material of the honeycomb panel, the heating portions 10a and 20
It is desirable to prevent a (for example, a portion where the temperature rises to 200 ° C. or more) from reaching the bonding portion between the frame material and the face plate in order to prevent the elution of the adhesive. Hereinafter, specific examples thereof will be described.

[0021]

First Embodiment As shown in FIG. 3, face plates 31 and 32 each having a thickness of 2.5 mm made of an aluminum alloy 3003, a side wall thickness of 5 mm, and an upper and lower end wall thickness of an aluminum alloy 6N01. A frame material 33 having a thickness of 5 mm and a total height of 60 mm and a thickness of 0.0
A honeycomb panel 37 having a core 35 having a size of 7 mm and a cell size of 12 mm (with a total width of 1000 mm and a total length of 3 mm)
m). The frame material 33 has a rectangular cross section having the above-mentioned thickness, and a cutout portion 33a to which the face plates 31, 32 are adhered and fixed is formed on the upper and lower end surfaces. These members constituting the honeycomb panel 37 were bonded to each other with an epoxy-based adhesive.

The outer surfaces of the frame member 33 are butted against each other and fixed so as not to open at the time of joining. And shoulder 2
Diameter D of 8a = 12, diameter d of pillar 28b = 5, pillar 28b
A rotating tool 28 made of steel having a length H = 5 (unit: mm: see FIG. 2) is rotated at a rotational speed of 1200 rpm and a welding speed of 50.
It was moved horizontally at 0 mm / min, and the back and front were simultaneously joined. The distance from the center of the joining portion 30 to the adhesive application portion (that is, the notch portion 33a) was 15 mm. No elution of the adhesive was observed at the adhesive application portion, and the bonding portion 30
Was in good condition, and no defects were found.

Second Embodiment As shown in FIG. 4, face plates 41 and 42 each having a thickness of 2.5 mm made of aluminum alloy 3003, a side wall thickness of 5 mm, and an upper and lower end wall thickness of 5 mm made of aluminum alloy 6N01. Frame material 43 with a height of 60 mm
And the thickness of 0.1 m by aluminum alloy 3003
Two honeycomb panels 47 (with a total width of 1000 mm and a total length of 3 m) having a core 45 having a cell size of 15 mm and a cell size of 15 mm were prepared. The frame member 43 has a substantially D-shaped cross section having the above-mentioned thickness, and has cutouts 43a on its upper and lower end surfaces to which the face plates 41 and 42 are adhered and fixed, and the lower end surface further projects in the outer peripheral direction. ing. These members constituting the honeycomb panel 47 were adhered to each other with an epoxy adhesive.

The outer edges of the lower end of the frame member 43 are abutted against each other and fixed so as not to open at the time of joining. And D
= 12, d = 5, H = 4.6 (unit mm: see FIG. 2), the steel rotary tool 28 is horizontally moved at a rotational speed of 1200 rpm and a welding speed of 500 mm / min, and the lower end outer end surfaces are joined to each other. did. Next, a thickness of 5 mm and a thickness of 6 mm at both ends,
Aluminum alloy 6N having an engagement portion 49a with a width of 5 mm
01 and the frame member 43 facing each other.
Are arranged between the upper end outer end faces. D = 12, d = 5, H
= 6 (unit mm: see FIG. 2) steel rotating tool 28,
The cover member 49 was horizontally moved at a rotation speed of 1200 rpm and a joining speed of 500 mm / min to join both ends of the cover member 49 and upper ends of a pair of frame members 43 adjacent thereto.

A substantially L-shaped engaging portion 43b bent upward is formed on the outer side of the upper end of the frame member 43, and the both ends of the cover member 49 are engaged with the engaging portions 43b. The substantially L-shaped engaging portion 49a is formed. In the present embodiment, the cover member 4 as a third member is placed between the upper ends of the pair of frame members 43 by the engagement of the engagement portions 43b and 49a.
9, the cover member 49 and the frame members 43 on both sides were friction stir welded to each other. Note that the engaging portions 43b,
49a is formed in a direction in which the engagement is ensured by the pressing force applied from the rotary tool 28 to the cover member 49, so that the cover member 49 and the frame member 43 are brought into good contact with each other during the friction stir welding. Was able to hold.

The distance from the center of the joining section 30 to the adhesive-applied section (ie, the notch 43a) was 20 mm. No elution of the adhesive was observed at the adhesive-applied part, the condition of the joint part 30 was good, and no defect was found. The joint 30 has a maximum depth of 0.05 mm.
However, a simple large putty panel could be formed by simple putty coating and painting. The surface of the joint 30 may be subjected to the above-mentioned putty coating and coating after grinding.

Third Example In the second example, a nonflammable weak elastic adhesive was used as the adhesive. When the pressing force at the time of bonding is increased, the surface (see FIG. 4) of the frame member 43 after bonding is opposite to the surface opposite to the joint 30.
5 mm, as shown in FIG.
A frame material 53 having 3c was used. The frame material 53 is
Except for the point that the thickness of the lower end surface is as thick as 10 mm and the point that the supporting member 53c is provided, the notch 4
It has a cutout 53a and an engagement portion 53b similar to the 3a and the engagement portion 43b. Also, as the face plates 51 and 52,
A stainless steel having a thickness of 5 mm was used. As a result, no measurable depression was found on the surface of the honeycomb panel 57 after the bonding.

A steel rotary tool 28 with D = 15, d = 7, and H = 9 (unit: mm, see FIG. 2) is rotated at 1200 rpm.
m, the substrate was horizontally moved at a joining speed of 300 mm / min, and the lower end outer end surfaces were joined together. The distance from the center of the joining portion 30 to the adhesive application portion (that is, the notch portion 53a) was 30 mm. No elution of the adhesive was observed at the adhesive-applied part, the condition of the joint part 30 was good, and no defect was found.

Fourth Embodiment The honeycomb panels 37 used in the first embodiment are vertically stacked so that the face plates 31 overlap as shown in FIG. 6, and frame members 33 are abutted in parallel. From the side of the butted portion, D = 12, d = 5, H = 5 (unit: mm: see FIG. 2)
Was horizontally moved at a rotational speed of 1200 rpm at a welding speed of 500 mm / min to perform friction stir welding. No elution of the adhesive was observed at the adhesive-applied part, the condition of the joint part 30 was good, and no defect was found.

COMPARATIVE EXAMPLE In the first embodiment, the distance from the center of the joint 30 to the adhesive-applied portion (ie, the notch 33a) was 7 mm. The adhesive melted out at the adhesive application part near the joint part 30, and the surface of the joint part 30 was rough and good joining could not be performed. In other words, when the aluminum alloy is stirred, an adhesive having a significantly different processing resistance is mixed in, the aluminum alloy is interrupted and continuous stirring cannot be performed, and a large amount of burrs such as cutting chips are generated, so that the grooves are intermittently formed. A bonded portion 30 having a shape was formed.

As described above, in each of the above-described embodiments, the frame members 33 to 53 of the honeycomb panels 37 to 57 are arranged in a direction of 3T to 20T (more preferably, 5T to 15T; T is the thickness of the face plates 31 to 52), and the protrusions of the frame members 33 to 53 are abutted against each other to perform friction stir welding. For this reason, the temperature rising part by the friction stir welding did not reach the above-mentioned adhesion part (adhesive application part), and the honeycomb panels 37 to 57 could be satisfactorily joined without eluting the adhesive. Therefore, the thus obtained honeycomb panel joined body of each of the above embodiments is:
There are no defects such as blowholes, solidification cracks, and loose bolts, and it is easy to manufacture.

If the projecting amount of the frame members 33 to 53 is less than 3T, the adhesive near the joint 30 is melted by the temperature rise by friction stir welding as in the comparative example, and In some cases, good friction stir welding cannot be performed due to the flow. Further, when the protrusion amount of the frame members 33 to 53 exceeds 20T, the portion occupied by the frame members 33 to 53 becomes large, and the original lightness of the honeycomb panels 37 to 57 is lost.

In the second and third embodiments, first, the lower ends of the frame members 43 or 53 are friction stir welded together.
Subsequently, if the cover material 49 is erected and the both ends of the cover material 49 and the upper ends of the frame materials 43 or 53 are friction stir welded respectively, two adjacent honeycomb panels 47 or 5 are joined.
7 is completed. That is, in joining the two honeycomb panels 47 or 57, the friction stir welding can always be performed from the same side of the honeycomb panels 47 or 57, so that the joining is extremely easy. Moreover, in the second and third embodiments, the engagement of the engaging portion 49a and the engaging portion 43b or 53b causes the
The frame 9 and the frame member 43 or 53 are held in a state where they abut against each other, and the engagement is secured by the force applied to the cover member 49 from the rotary tool 28. Therefore, each member can be held in the above-mentioned butted state very well, and the production becomes easier. Therefore, the honeycomb panel joined body of the second embodiment or the third embodiment is extremely easy to manufacture.

Further, in the fourth embodiment, the honeycomb panel 3
7, the frame members 33 are butted in parallel with each other, and the butt portions are friction stir welded. Therefore, a thick honeycomb panel joined body can be easily obtained. It should be noted that the present invention is not limited to the above-described embodiment at all, and can be implemented in various forms without departing from the gist of the present invention. For example, in each of the above-described embodiments, the case where the frame members 33 to 53 are made of an aluminum alloy has been described. However, the present invention is similarly applied to a case where the frame members 33 to 53 are made of another metal capable of friction stir welding such as copper. can do.

[Brief description of the drawings]

FIG. 1 is an explanatory view schematically showing a form of friction stir welding to which the present invention is applied.

FIG. 2 is a side view showing a rotary tool used for the friction stir welding.

FIG. 3 is an explanatory diagram schematically showing a configuration of a first embodiment.

FIG. 4 is an explanatory diagram schematically showing a configuration of a second embodiment.

FIG. 5 is an explanatory diagram schematically showing a configuration of a third embodiment.

FIG. 6 is an explanatory diagram schematically showing a configuration of a fourth embodiment.

[Explanation of symbols]

28 rotating tool 30 joining part 31, 32, 41, 42, 51, 52 face plate 33, 43, 53 frame material 35, 45 core 37, 47, 57 honeycomb panel 43b, 49
a, 53b ... engaging part 49 ... cover material

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (reference) // B23K 101: 02 103: 10 F term (reference) 2E162 CB08 CB15 GA02 GB07 4E067 AA05 BG00 BG02 DA13 DA17 EC09 4F100 AB04 AB10 AB17 AK53G AT00A AT00C BA03 BA06 BA10A BA10C BA31 DC02B EC18 EC182 GB07 JL02

Claims (5)

[Claims] 1. A honeycomb panel comprising: a pair of face plates; a honeycomb core formed between the pair of face plates; and a frame member bonded between opposing edges of the pair of face plates. And a honeycomb panel joined body formed by joining a plurality of the honeycomb panels, wherein the frame material is 3T in an outer peripheral direction from a bonding portion with the face plate.
２０20T (T is the thickness of the face plate) is provided so as to protrude, the protruding portions of the frame material are abutted against each other, and a rotary tool is rotated and moved along the abutted portion to perform friction stir welding. While the honeycomb panel is joined, the heating part by friction stir welding is
A joined body of honeycomb panels provided so as not to reach a bonding portion between the frame material and the face plate. 2. One of the face plates of the frame material is further protruded in the outer peripheral direction from the other face plate side, and the tips of the protruding portions are friction stir welded to each other, and the other face plate of the frame material is provided. On the side, a third member is provided between the frame members, and the abutting portion between the third member and each of the frame members is subjected to the friction stir welding. The honeycomb panel joined body according to claim 1, wherein the temperature raising part is also provided so as not to reach a bonding portion between the frame material and the face plate. 3. An engaging portion that engages when the third member abuts on each of the frame members is provided on each of the third member and each of the frame members. The honeycomb panel assembly according to claim 2, wherein the third member is formed in a direction in which the engagement is ensured by a pressing force applied in the direction of the one face plate. 4. The method according to claim 1, wherein the projecting portions of the frame material are butt-connected in parallel so that face plates of the respective honeycomb panels overlap, and the friction stir welding is performed along the butt portion. 2. The honeycomb panel joined body according to 1. 5. The honeycomb panel according to claim 1, wherein the surface of the joining portion formed by the friction stir welding is smoothed by applying a putty and painting as it is or after grinding. Joint.