JPH05277597A - Manufacture of honeycomb panel - Google Patents

Abstract

PURPOSE:To obtain a rigid panel which can be joined easily by welding the end part of a waveform of a honeycomb core and a side plate, and subsequently, welding the top part of a corrugated groove and the upper face sheet, and next, joining a bottom part of the corrugated groove part and the lower face sheet and joining the side plate. CONSTITUTION:A welding laser beam L is moved along the waveform of a contact part between the end part of a honeycomb core 3 and a side plate 5, and the honeycomb core 3 and the side plate 5 are welded and joind. Subsequently, the top part of a corrugated groove of the honeycomb core 3 and the upper face sheet 2a are welded by radiating the laser beam L from the bottom part side of the corrugated groove. Next, a bottom part of the corrugated groove of the honeycomb core 3 and the lower face sheet 2b are welded and joined by using the laser beam L. In such a way, a honeycomb panel structure which can be joined easily, has no welding marks and is excellent in corrosion resistance is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a honeycomb panel made of metal such as stainless steel or titanium. The honeycomb panel of the present invention comprises a honeycomb core sandwiched between a pair of face sheets on the upper and lower surfaces. Usually, the honeycomb core has a corrugated cross section and is joined to the face sheet by adhesion or welding. The honeycomb panel having such a structure is very light and has excellent strength. This type of honeycomb panel is used in aircraft, ships, vehicles and the like.

[0002]

2. Description of the Related Art A honeycomb structure having a large area is formed by joining honeycomb panels to each other. FIG. 9 shows JP-A-6
It is an example of the joining method described in No. 2-238072. Figure 9
Since the face sheets 2a, 2b and 2a ', 2b' are likely to be distorted when joining the honeycomb cores 3, the dimensional accuracy is poor and the plate thickness is thin. When the honeycomb panels are joined by joining 2a and 2a ′ and 2b and 2b ′ of FIG. 9 (A), the butt welding of 2a and 2a ′ and the like is thin and the dimensions of 2a and 2a ′ and the like are small. Not easy due to poor accuracy.

In FIG. 9B, an insert material 4 having a height larger than the thickness of the honeycomb panel is sandwiched, and 2a and 2a 'and 2b and 2b' are welded through the insert material 4. However, the method of FIG. 9B has a problem in that sufficient bonding strength cannot be obtained because the cores are not bonded and only the face sheet is bonded. Further, the protruding insert material 4 raises the joint portion and spoils the appearance. Furthermore, the step of inserting the insert material each time joining is complicated.

[0004]

According to the present invention, a sufficient joining strength can be secured, and since there is no swelling at the joining portion, the surface after joining is beautiful and further joining can be performed easily. It is an object to provide a method for manufacturing a honeycomb panel.

[0005]

FIG. 1 is an explanatory view of the method of the present invention. FIG. 1A shows an example of the honeycomb core 3, which is previously formed in a corrugated plate shape. The shape of the wave is not particularly limited, and may be a corrugated plate having a continuous trapezoid or a continuous corrugated curve.

FIG. 1 (B) is a view showing the joining of the honeycomb core 3 and the side plate 5. In the present invention, the corrugated end surface of the honeycomb core 3 and the side plate 5 are welded and joined along the corrugated end surface. The side plate 5 of the present invention may be made of the same material as or a material similar to that of the honeycomb core 3. For example, the welding laser beam L is caused to travel along the waveform of the contact portion between the end portion of the honeycomb core 3 and the side plate 5, and the honeycomb core 3 and the side plate 5 are welded and joined along the end face of the waveform. In the figure, LH is a laser welding head, and LF is an example of an optical fiber for transmitting a laser beam to the LH.

FIG. 1C is a view showing the attachment of the upper face sheet 2a. For this attachment, the top of the wave groove of the honeycomb core 3 and the upper face sheet 2a are placed from the bottom side of the wave groove.
The welding is performed by irradiating an energy beam, for example, a laser beam L. In the present invention, welding is performed from the bottom side of the wave groove by using the energy beam whose irradiation condition is preselected, so that no welding mark is generated on the outer surface of the upper face sheet 2a. Although the welding is performed at one location in the figure, it is determined to be one location, two locations or three locations depending on the required strength of the honeycomb panel, and the welding mode may be determined by seam welding or pulse welding. Therefore, it is possible to manufacture a honeycomb panel having a strong and beautiful surface. Reference numeral 6 in the figure denotes a joint between the upper face sheet 2a and the honeycomb core 3.

FIG. 1D is a view showing the attachment of the lower face sheet 2b. This attachment is performed by welding and joining the bottom of the wave groove of the honeycomb core 3 and the lower face sheet 2b using, for example, the laser beam L. Welding marks are generated on the outer surface of the lower face sheet 2b, but the appearance of the lower face sheet 2b is not important, for example, the rear face of the honeycomb structure does not impair the outer appearance of the honeycomb structure. .. Reference numeral 7 in the drawing is an example of a joint portion between the lower face sheet 2b and the honeycomb core 3.

In the present invention, the upper face sheet 2a is welded to the side plate 5, and the lower face sheet 2b is also welded to the side plate 5. However, these weldings may be performed before the welding of the honeycomb core and the face sheet. Good or you can go later.

FIG. 2 is an explanatory view of the operation of the honeycomb panel of the present invention produced in this way, (A) is an explanatory plan view,
(B) is an explanatory view of the front surface, and (C) is an explanatory view of a cross section taken along the line EE. The honeycomb panel 1 includes an upper face sheet 2a,
The lower face sheet 2b, the honeycomb core 3 and the side plates 5 are formed, and the honeycomb panel 1'is formed of the upper face sheet 2
a ', the lower face sheet 2b', the honeycomb core 3 ', and the side plate 5'.

When the honeycomb structure is produced, the two honeycomb panels 1 and 1'are joined together. However, as shown in FIGS. 2A and 2B, the side plates 5 and 5'are joined together. Are abutted and joined to each other, for example by welding 8.

As shown in FIG. 9, a conventional honeycomb panel is joined to the upper face sheets 2a and 2a 'and the lower face sheets 2b and 2b', or to the 2a via the insert material 4. 2a 'and 2b and 2
It is a joint with b '. However, there is a problem that rigidity and strength of the joint portion are small only by joining the face sheets.

In the present invention, as described with reference to FIG. 1B, the end face of the honeycomb core 3 and the side plate 5 are welded to each other along the corrugated end face. Reference numeral 9 and 9'in FIG. 2 are the welded portions. By this welding 9 (9 '), the side plate 5 (5') receives all the rigidity and strength of the honeycomb core 3 (3 '). For this reason, when the side plates 5 and 5'are joined by welding 8, the rigidity and strength of the honeycomb cores 3 and 3'are all received by the joint, and the rigidity and strength do not deteriorate at the joint. Therefore, the honeycomb structure in which the honeycomb panels 1 and 1'of the present invention are bonded to each other has the same rigidity and strength as a seamless long honeycomb panel.

When the honeycomb panels of the present invention are bonded to each other, the insert material 4 of FIG. 9 having a height larger than the thickness of the honeycomb panels is not used. Therefore, it is possible to obtain a beautiful joint without raising the joint.

In the honeycomb panel having no side plate 5, the dimensional accuracy of the end portions of the face sheets 2a and 2b is poor due to the distortion when the face sheets 2a and 2b and the honeycomb core are joined, and the face sheets 2a and 2b are not plate-shaped. Due to the small thickness, welding the honeycomb panels together requires skill.
In the honeycomb panel of the present invention, since the end portion of the face sheet is welded and joined to the side plate, the face sheets 2a and 2b are
The dimensional accuracy of the ends of the honeycomb panel is high, and since the welded joints are formed on the wide butt surfaces 5 and 5 ', the honeycomb panels can be easily welded to each other.

FIG. 3 is an explanatory view of the side plate 5 provided with the corrugated fitting groove 10 for fitting the corrugated end surface of the honeycomb core.
Fitting groove _{1 having} a groove width t ₁ larger than the thickness of the honeycomb core 3
0 is previously engraved on the side plate 5 by, for example, cutting. When welding the corrugated end surface of the honeycomb core and the side plate 5, the corrugated end surface of the honeycomb core 3 is first fitted into the fitting groove 10 of the side plate, and then along the corrugated cutting surface shown in FIG. 1 (B). Welding. According to this method, when the honeycomb core and the side plate are welded, the welded portions are fixed to each other, so that the welding operation is easy and a joined portion with excellent dimensional accuracy can be formed.

In FIG. 3, if the groove width t ₁ of the fitting groove 10 is increased, the honeycomb core 3 can be easily set on the side plate 5, but the gap between the honeycomb core 3 and the fitting groove 10 becomes large, Welding speed is reduced. At this time, the gap between the fitting groove 10 and the honeycomb core 3 is filled with a metal filling material.
Filling with (paste or the like), and then welding shown in FIG. 1 (B) along the end face of the corrugation is performed. According to this method, the honeycomb core and the side plate can be easily set and the welding can be performed at a high speed. As the metal filler, a commercially available paste prepared by kneading nickel powder with an adhesive, a metal wire, or the like can be used.

FIG. 4 shows an example of a side plate 5 having a step formed by the thicknesses d ₁ and d _{2 of a} corrugation that is fitted to the corrugated end surface of the honeycomb core. When this side plate 5 is used, the honeycomb core can be set in close contact with the side plate 5 easily.
At this time, the welding joining described in FIG. 1 (B) is performed after fitting the corrugated end of the honeycomb core to the step of the side plate. By using this method, the honeycomb core and the side plate can be easily welded and joined together with high efficiency.

FIG. 5 is an explanatory view of the honeycomb panel of the present invention using the side plate 5 having an L-shaped cross section. From the upper face sheet 2a, the lower face sheet 2b, the honeycomb core 3 and the L-shaped side plate 5a, the upper face sheet 2a ', the lower face sheet 2b', the honeycomb core 3'and the L-shaped side plate 5a '. Honeycomb panel 1 '
When joining and on the pillar 11, the L-shaped side plates 5a, 5
When the respective flange portions of a ′ are joined to the support columns 11 by welding 13 and 13 ′, for example, the honeycomb panels 1 and 1 ′ can be easily bonded via the support columns 11 with high bonding strength. Reference numeral 12 in the drawing denotes a lid which is used if necessary, and can be welded to the upper face sheets 2a and 2a 'to form a flat and beautiful joint.

FIG. 6 is an explanatory view of the honeycomb panel of the present invention using the side plate 5b having a U-shaped cross section. For example, horizontal beam 1
It is difficult to fit and join 4 and the honeycomb panel with a conventional honeycomb panel. The honeycomb panel 1 having the side plate 5b having a U-shaped cross section and the honeycomb panel 1 ′ having the side plate 5b ′ having a U-shaped cross section can be easily joined by fitting the side plates 5b and 5b ′ to the cross beam 14. .. At this time, it goes without saying that the transverse beam 14 and the side plate 5b and the like can be joined to each other with higher strength by welding or the like, if necessary.

FIG. 7 is an explanatory view of the joining of the honeycomb panel 1 having the side plate 5c having the laterally convex cross section and the honeycomb panel 1'having the side plate 5d having the laterally concave cross section. The honeycomb panels 1 and 1'can be easily joined by fitting the convex portions and the concave portions of the side plates to each other. At this time, 5c
It is needless to say that and 5d can be joined with high strength by welding or the like.

Although an example in which the side plate is arranged on one side surface of the honeycomb panel has been described, in the present invention, the side plate can also be arranged on the other corrugated cut surface of the honeycomb core to join a large number of honeycomb panels. It goes without saying that the same effect as described above can be obtained when the side plate is arranged on the side surface of the honeycomb panel parallel to the corrugated grooves of the honeycomb core.
It goes without saying that the same effect can be obtained. Therefore, these honeycomb panels are also included in the present invention.

FIG. 8 is an explanatory diagram of the example. Side plates 5e, 5f, 5g having L-shaped cross sections on four side surfaces of the honeycomb panel,
The honeycomb panel 1 of the present invention in which 5h is arranged can easily join other honeycomb panels to each other with a strong joining force in front, back, left and right, and the joining surface is beautiful at the time of joining.

[0024]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The embodiments described below are intended to explain the present invention in principle, and needless to say have no meaning to limit the invention.

The honeycomb core constituting the honeycomb panel used in the example is made of stainless steel and has a thickness of 300 μm as shown in FIG. 1 (A). It is a corrugated plate having a continuous trapezoidal shape and the wave period is 35 mm, the wave height is 40 mm, the surface in contact with the face sheet corresponds to the bottom of the trapezoid, and has a width of 5 mm. The side plate 5 is made of L-shaped stainless steel as shown in FIG. 1 (B), and has a height width of 40 mm and a length of 300 mm,
The wall thickness is 5 mm.

As shown in FIG. 1B, the corrugated plate 3 and the side plate 5 are joined to each other by bringing the corrugated end portion of the honeycomb core after molding into contact with the side plate 5, and welding laser beam L to the contact portion. Was irradiated. The laser used was a continuous wave oscillation YAG laser often used in general welding, and the beam was transmitted to the laser welding head LH by the optical fiber LF for welding. The processing conditions at this time were an output of 240 W and a processing speed of 1 m / min. The process of joining the honeycomb core and the side plate was performed on all sides of the honeycomb panel as shown in FIG.

Thereafter, as shown in FIGS. 1 (C) and 1 (D), a face sheet made of the same material as the honeycomb core is superposed on the honeycomb core. First, as shown in FIG. 1 (C), the face sheet 2a is placed from the honeycomb core side. Were joined under the condition that no welding mark was formed on the surface of the above, and then the face sheet 2b on the opposite side was welded. Further, the side plate and the face sheet were joined from the side so that no welding mark was formed on the surface of the face sheet. The welding conditions of the laser at this time are 600 W and the processing speed is 1 per minute.
It was m.

As a result, a square honeycomb panel having one side of 300 mm was formed. Using honeycomb panels with such side plates, the flange tip portions of the side plates of the honeycomb panels were joined by TIG welding. Also, FIG.
The side plate 5 and the T-shaped other member 11 were joined as shown in FIG.

When a bending test was performed using the honeycomb panels thus bonded to each other, the honeycomb was strong without breakage of the bonded part or the honeycomb panel, and had excellent corrosion resistance with no welding marks on at least one surface. A panel structure could be obtained.

[0030]

EFFECTS OF THE INVENTION According to the present invention, it is easy to join honeycomb panels to each other or to other members, and there is no problem that sufficient strength cannot be obtained by the conventional joining of honeycomb panels and that welding marks are left on the honeycomb panel surface. In addition, a strong honeycomb panel can be obtained by using the side plate, and there is no welding mark on the surface of the honeycomb panel structure. As a result, it has become possible to use a honeycomb panel that is easier to assemble than conventional and has excellent corrosion resistance.

[Brief description of drawings]

1 is an explanatory view of a method for manufacturing a honeycomb panel of the present invention, FIG. 2 is an explanatory view of an operation of the honeycomb panel of the present invention, FIG. 3 is an explanatory view of a side plate provided with a fitting groove, and FIG. 4 is a side plate having a step. 5 is an explanatory view of a honeycomb panel of the present invention using an L-shaped side plate, FIG. 6 is an explanatory view of a honeycomb panel of the present invention using a U-shaped side plate, and FIG. An explanatory view of a honeycomb panel of the present invention using a laterally convex side plate, FIG. 8 is an explanatory view of a honeycomb panel of the present invention in which side plates are arranged on four side surfaces, and FIG. 9 is an explanatory view of a known bonding method of the honeycomb panel, Is.

[Explanation of symbols]

1 (1 '): Honeycomb panel, 2 (2a, 2b): Face sheet, 3: Honeycomb core, 4: Insert material,
5 (5a, 5b, 5c, 5d, 5e, 5f, 5g, 5
h): side plate, 6: welded part, 7: welded part, 8: welded part, 9 (9 ′): welded part, 10: fitting groove, 11: other structural member, 12: lid, 13: welded, 14: Other structural member.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akira Ishibashi 4-1-36-201 Namiki, Sagamihara City, Kanagawa Prefecture

Claims (5)

[Claims] 1. A corrugated honeycomb core having corrugated end faces and side plates welded to each other along the corrugated end faces by welding, and a top portion of the corrugated grooves of the honeycomb core and an upper face sheet from the bottom side of the corrugated grooves to the energy beam. Welding using, the bottom portion of the corrugation of the honeycomb core and the lower face sheet are welded and joined together, and the face sheet and the side plate are welded before or after the welding of the honeycomb core and the face sheet. Manufacturing method of honeycomb panel. 2. A side plate having a corrugated fitting groove for fitting the corrugated end face of the honeycomb core, wherein the corrugated end face of the honeycomb core and the side plate are welded to each other by fitting the corrugated end face of the honeycomb core to the side plate. The method for manufacturing a honeycomb panel according to claim 1, wherein the welding is performed by fitting the groove into a mating groove and then performing welding along the corrugated end surface. 3. A fitting groove in which the width of the fitting groove is larger than the thickness of the honeycomb core, and the corrugated end surface of the honeycomb core and the side plate are welded to each other by fitting the corrugated end surface of the honeycomb core to the side plate. The manufacturing of a honeycomb panel according to claim 2, wherein the welding is performed by fitting in a mating groove, filling a gap between the mating groove and the honeycomb core with a metal filler, and then performing welding along the corrugated end face. Method. 4. A side plate having a corrugated step for fitting the corrugated end surface of the honeycomb core, wherein the corrugated end surface of the honeycomb core and the side plate are welded to each other by fitting the corrugated end surface of the honeycomb core to the step of the side plate. The method for manufacturing a honeycomb panel according to claim 1, wherein the joining is performed by welding and then along the corrugated end face. 5. The side plate according to claim 1, 2 or 3 or 4, wherein the side plate is a side plate having an L-shaped section, a U-shaped section, a laterally convex section or a laterally concave section. Manufacturing method of honeycomb panel.