A connection structure of all-aluminum composite panels for furniture

Abstract

The present invention relates to the technical field of composite metal plates, and specifically to a connection structure of an all-aluminum composite plate for furniture. The all-aluminum composite plate comprises an aluminum plate on both sides and a foam aluminum plate in the middle, and the aluminum plate and the foam aluminum plate are welded by laser. The characteristics are as follows: the connection structure is the welding between aluminum plates, which are polished and flattened after welding, and the welding is the welding between two all-aluminum composite plates to form an angle, and the two all-aluminum composite plates are welded by at least two welds. By laser welding, the deformation of the aluminum plate is small, so that the surface of the processed workpiece is flat.

Description

Technical Field

[0001] The invention relates to the technical field of composite metal plates, and in particular to a connection structure of an all-aluminum composite plate for furniture. Background Art

[0002] All-aluminum composite panels are generally composed of a middle layer of foam aluminum panels and aluminum panels on the sides of the panels. In the prior art, the foam aluminum panels and the aluminum panels can be fixed by a viscose film. For example, Publication No. CN109747237B discloses a production process for foam aluminum composite panels, in which the foam aluminum panels and the panels are glued together by a film. They can also be fixed by brazing. For example, Publication No. CN110481116A discloses a foam aluminum composite panel and a method for making the same, in which brazing is performed in a vacuum chamber to form a whole at high temperature. They can also be formed by 3D printing. For example, Application No. 201611115086.8 discloses a method for melting and forming a foam aluminum composite panel, in which a foam aluminum core and an outer aluminum panel are printed by 3D printing.

[0003] All of the above methods are difficult to produce a large number of aluminum profiles continuously and quickly.

[0004] In summary, in the past, no attempt has been made to fix the aluminum plate and the foam aluminum plate by welding, especially laser welding. This is because other welding methods are extremely damaging and can easily deform the surface of the aluminum plate due to high temperature. Since the laser has the optical properties of refraction and focusing, laser welding forms a light spot after focusing the laser beam, and the shape of the light spot can be adjusted to concentrate the energy, so that only a small part of the aluminum plate is melted when welding, and the heat conducted by the melting causes less softening of the aluminum plate. Most of the aluminum plate does not melt or soften, and can maintain its original flat shape unchanged. Therefore, laser welding has small deformation and can make the surface of the processed workpiece flat. Summary of the invention

[0005] The present invention aims to solve the above-mentioned technical problem, and provides a connection structure of an all-aluminum composite plate for furniture.

[0006] The object of the present invention is achieved in the following manner: a connection structure of an all-aluminum composite plate for furniture, comprising an all-aluminum composite plate, wherein the two sides of the all-aluminum composite plate are aluminum plates, and the middle is a foam aluminum plate, and the aluminum plates and the foam aluminum plates are welded by laser, and the connection structure is the welding between aluminum plates, which are polished and flattened after welding, and the welding is the welding that forms an angle between two all-aluminum composite plates, and the two all-aluminum composite plates are welded by at least two welds.

[0007] Angle welds are L-shaped connections.

[0008] The L-shaped connection is welding between the inner aluminum plates of the two all-aluminum composite plates and welding between the outer aluminum plates.

[0009] The L-shaped connection is that the inner aluminum plate of the all-aluminum composite plate B extends to the outer plate of the all-aluminum composite plate A, the two inner aluminum plates are welded together, and the two outer aluminum plates are welded together.

[0010] The L-shaped connection is that the inner aluminum plate of the all-aluminum composite plate B extends to the outer plate of the all-aluminum composite plate A, and the inner aluminum plate of the all-aluminum composite plate B is welded to the aluminum plates on both sides of the all-aluminum composite plate A.

[0011] A weld that forms an angle is called a T-joint.

[0012] The T-type connection is formed by welding two aluminum plates at the ends of the all-aluminum composite plate A to an aluminum plate on one side of the all-aluminum composite plate B.

[0013] The T-type connection is that two aluminum plates at the ends of the all-aluminum composite plate A pass through the aluminum plate and the foam aluminum plate on one side of the all-aluminum composite plate B, and are welded to the passed aluminum plates.

[0014] The all-aluminum composite sheet C63 is welded on the side where the sheets form an angled connection to form a three-dimensional connection.

[0015] At least one double-headed barb 8 is arranged at the position where the foam aluminum plates of the two all-aluminum composite plates contact each other.

[0016] Compared with the prior art, the all-aluminum composite plate of the present invention is welded by laser, the deformation of the aluminum plate is small, and the surface of the processed workpiece is smooth. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the all-aluminum composite plate of the present invention;

[0018] Figure 2 It is a schematic diagram of the structure at the beginning of the preparation of the all-aluminum composite plate;

[0019] Figure 3 It is a schematic diagram of the structure during the preparation process of the all-aluminum composite plate;

[0020] Figure 4 yes Figure 3 An enlarged view of point A (welding point);

[0021] Figure 5 It is an L-shaped connection structure with an angled angle of all-aluminum composite panels;

[0022] Figure 6 It is an L-shaped connection structure with a missing corner of the all-aluminum composite plate;

[0023] Figure 7 It is a rounded L-shaped connection structure of all-aluminum composite panels;

[0024] Figure 8 It is the first T-type connection structure of all-aluminum composite panels;

[0025] Fig. 9 It is the second T-type connection structure of all-aluminum composite panels;

[0026] Fig.10 It is the third T-type connection structure of all-aluminum composite panels;

[0027] Fig.11 It is a schematic diagram of the structure in which double-headed barbs are arranged between the foam aluminum plates.

[0028] Among them, 1. All-aluminum composite plate; 11. Foam aluminum plate; 12. Aluminum plate; 121. Melting thickness; 122. Softening thickness; 13. Weld; 2. Aluminum strip coil; 3. Active roller; 4. Passive roller; 5. Laser welding gun; 51. Welding spot; 61. All-aluminum composite plate A; 62. All-aluminum composite plate B; 63. All-aluminum composite plate C; 7. Connecting weld; 8. Double-head barb. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In the present invention, unless otherwise clearly stipulated and limited, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0031] Embodiment 1:

[0032] As attached Figure 1-4 As shown, an all-aluminum composite board for furniture includes a foam aluminum board 11, and aluminum boards 12 are laser-welded on both sides of the foam aluminum board 11.

[0033] A method for preparing an all-aluminum composite plate for furniture comprises the following steps:

[0034] (1) preparing a foam aluminum plate 11 with a thickness of 5-50 mm;

[0035] (2) flushing the outer surface of the foam aluminum plate 11 with a high-pressure air flow;

[0036] (3) The cleaned foam aluminum plate 11 is clamped and fixed by the passive roller 4;

[0037] (4) Prepare two rolls of 0.4-2 mm thick aluminum strip rolls 2;

[0038] (5) Feed the foam aluminum plate 11 forward until it reaches between the active rollers 3, place the ends of the two rolls of aluminum strips 2 on both sides of the ends of the foam aluminum plate 11, and clamp them together between the active rollers 3;

[0039] (6) A laser welding gun 5 that moves up and down is arranged in front of the separation of the aluminum strip and the foam aluminum plate 11, and the focus of the laser welding gun 5 is adjusted so that the focus of the laser welding gun 5 is located on the edge line where the aluminum strip and the foam aluminum plate 11 are crimped. The laser welding gun 5 is turned on so that the focus of the laser welding gun 5 is welded from one side to the other side along the edge line in the width direction of the aluminum strip. After the welding is completed, the active roller rotates so that the welded aluminum strip and the foam aluminum plate 11 move the distance of the weld seam, and the welding of the next weld seam is carried out. After the welding, the aluminum strip pressed by the active roller 3 forms an aluminum plate 12;

[0040] (7) After welding, the welded all-aluminum composite plate 1 is clamped by the passive roller 4 behind the active roller 3.

[0041] Embodiment 2: This embodiment is a further limitation of Embodiment 1, wherein the thickness of the foam aluminum plate 11 is 5-50 mm, and the thickness of the aluminum plate 12 is 0.4-2 mm.

[0042] Example 3: This example is a further limitation of Example 1. The distance between two welds 13 is 0-20 mm. The welds are welded along the width direction of the aluminum plate. When the distance between two welds 13 is 0, it means that after one weld 13 is completed, the active roller 3 feeds the distance of a light spot (i.e., one weld 13) so that the welds 13 are tightly attached to achieve complete welding.

[0043] Example 4: This example is a further limitation of Example 3. The weld 13 is consistent with the diameter of the light spot at the laser focus, and the spacing of the weld 13 is consistent with the average diameter of the foam holes in the foam aluminum plate 11. Although complete welding is not achieved in this way, the welding speed will be faster and the weld points will be more uniform.

[0044] Example 5: This example is a further limitation of Example 4. The molten thickness 121 of the weld 13 on one side of the aluminum plate 12 is 0.05-0.3 mm, and the sum of the softened thickness 122 and the molten thickness 121 is less than 2 / 3 of the thickness of the aluminum plate 12, so that the other side of the aluminum plate 12 (i.e., the side facing outward) is smooth and has no signs of softening. Preferably, the sum of the softened thickness 122 and the molten thickness 121 is between 1 / 3-2 / 3 of the thickness of the aluminum plate 12.

[0045] Embodiment 6: This embodiment is a further limitation of Embodiment 1, wherein the foam aluminum plate 11 is pure aluminum or an aluminum alloy, and the aluminum plate 12 is pure aluminum or an aluminum alloy.

[0046] Embodiment 7: This embodiment is a further limitation of Embodiment 1. In step (6), the diameter of the cross section of the welding spot 51 at the focus of the laser welding gun 5 is 0.2-0.5 mm.

[0047] Embodiment 8: This embodiment is a further limitation of Embodiment 7. 1 / 3±1 / 5 of the welding spot 51 is used to melt the aluminum strip, and 2 / 3±1 / 5 of the welding spot 51 is used to melt the foam aluminum plate 11. Since the aluminum strip is thinner and the foam aluminum plate 11 is thicker and easily deformed, this arrangement can not only reduce the deformation thickness of the aluminum strip, but also speed up the welding speed.

[0048] Embodiment 9: This embodiment is a further limitation of Embodiment 1, and the lateral moving speed of the laser welding gun 5 is 10-600 mm / s.

[0049] Example 10: This example is a further limitation of Example 1. The active roller 3 has an extrusion force on the aluminum strip and the foam aluminum plate 11. The extrusion force reduces the thickness of the foam aluminum plate 11 by 0.1-0.3 mm on each side. Since the surface of the foam aluminum plate 11 melts during welding, the thickness of the foam aluminum plate 11 is reduced on each side through extrusion, so that the aluminum strip and the foam aluminum plate 11 are pressed more tightly, and the aluminum strip is flattened and fixed as the aluminum plate 12.

[0050] Since laser has the optical properties of refraction and focusing, laser welding forms a light spot after focusing the laser beam, and the shape of the light spot can be adjusted to concentrate the energy, so that only a small part of the aluminum plate is melted during welding, and the heat conducted by the melting causes a small part of the aluminum plate to soften, while most of the aluminum plate does not melt or soften, and can maintain its original flat shape unchanged. Therefore, laser welding has small deformation and can make the surface of the processed workpiece smooth. In this way, compared with the existing technology, the production capacity can be greatly improved, and the production of all-aluminum composite plates can be accelerated.

[0051] Embodiment 11: A connection structure of an all-aluminum composite plate for furniture, comprising an all-aluminum composite plate 1, wherein the two sides of the all-aluminum composite plate 1 are aluminum plates 12, and the middle is a foam aluminum plate 11. The aluminum plates 12 and the foam aluminum plates 11 are welded by laser. The connection structure is the welding between the aluminum plates 12 and the aluminum plates 12, which are polished and flattened after welding. The welding is an angled welding between the two all-aluminum composite plates 1, and the two all-aluminum composite plates 1 are welded by at least two connecting welds 7.

[0052] Embodiment 12: This embodiment is a further limitation of Embodiment 11, and the angled welding is an L-shaped connection.

[0053] Embodiment 13: This embodiment is a further limitation of Embodiment 12. The L-shaped connection can be Figure 5 As shown, the beveled edges of the all-aluminum composite plate A61 and the all-aluminum composite plate B62 are connected, and the connecting weld 7 is located at the joint of the aluminum plates 12 of the all-aluminum composite plate A61 and the all-aluminum composite plate B62, which is the welding between the inner aluminum plates 12 of the two all-aluminum composite plates 1 and the welding between the outer aluminum plates 12.

[0054] Embodiment 14: This embodiment is a further limitation of Embodiment 12. The L-shaped connection may also be as follows: Figure 6 As shown, a piece of the all-aluminum composite plate A61 is dug out to form a part that matches the all-aluminum composite plate B62, and the inner aluminum plate 12 of the all-aluminum composite plate B62 extends to the outer plate of the all-aluminum composite plate A61, and the two inner aluminum plates are welded together, and the two outer aluminum plates are welded together.

[0055] Embodiment 15: This embodiment is a further limitation of Embodiment 12. The L-shaped connection may also be as follows: Figure 7 As shown, the inner aluminum plate of the all-aluminum composite plate B62 extends to the outer plate of the all-aluminum composite plate A61, and the inner aluminum plate 12 of the all-aluminum composite plate B62 is welded to the aluminum plates on both sides of the all-aluminum composite plate A61.

[0056] Embodiment 16: This embodiment is a further limitation of Embodiment 11, and the angled welding is a T-type connection.

[0057] Embodiment 17: This embodiment is a further limitation of Embodiment 16. The T-type connection is as follows: Figure 8 or Fig.10 As shown, the two aluminum plates 12 at the end of the all-aluminum composite plate A61 are welded to the aluminum plate 12 on one side of the all-aluminum composite plate B62. Figure 8 and Fig.10 The difference is Figure 8 The foam aluminum plates 11 of the all-aluminum composite plate A61 and the all-aluminum composite plate B62 are in contact with each other.

[0058] Embodiment 18: This embodiment is a further limitation of Embodiment 16. The T-type connection can also be as follows: Fig. 9 The two aluminum plates 12 at the end of the all-aluminum composite plate A61 pass through the aluminum plate 12 and the foam aluminum plate 11 on one side of the all-aluminum composite plate B62, and are welded to the passed aluminum plates 12.

[0059] Example 19: This example is a further limitation of Examples 11-18. An all-aluminum composite plate C63 is welded on the side of the angled connection of the plates to form a three-dimensional connection. The logic of welding is based on the above-mentioned L-type connection and T-type connection. After a part of the all-aluminum composite plate C63 is dug out, the welded all-aluminum composite plate A61 and all-aluminum composite plate B62 are matched with the all-aluminum composite plate C63 to form a three-dimensional structure, and the connecting weld 7 is exposed to the outside.

[0060] Example 20: Fig.11 As shown, in the above-mentioned connecting piece, at least one double-headed barb 8 is provided at the contact position of the foam aluminum plates 11 of the two all-aluminum composite panels 1 to enhance the strength of the connection.

[0061] The right angle formed between the all-aluminum composite plate A61 and the all-aluminum composite plate B62 in the above-mentioned L-shaped connection and T-shaped connection is for the convenience of illustration, but not for limiting the angle. As long as it is based on the connection logic described in the present invention, it should fall within the protection scope of the present invention.

[0062] All panel furniture can be connected through several all-aluminum composite panels 1 based on the above connection logic.

[0063] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several changes and improvements can be made without departing from the overall concept of the present invention, which should also be regarded as the scope of protection of the present invention.

Claims

1. A connection structure of all-aluminum composite panels for furniture, characterized in that: It includes an all-aluminum composite plate, the two sides of the all-aluminum composite plate are aluminum plates, the middle is a foam aluminum plate, and the aluminum plates and the foam aluminum plates are welded by laser. The preparation method is as follows: S1. Prepare a foam aluminum plate with a thickness of 5-50 mm; S2, flushing the outer surface of the foam aluminum plate with a high-pressure air flow; S3, clamping and fixing the cleaned foam aluminum plate with a passive roller; S4, prepare two rolls of 0.4-2 mm thick aluminum strip; S5, feed the foam aluminum plate forward until it is between the active rollers, place the ends of the two rolls of aluminum strips on both sides of the ends of the foam aluminum plate, and clamp them together between the active rollers; S6. A laser welding gun that moves up and down is arranged in front of the separation of the aluminum strip and the foam aluminum plate, and the focus of the laser welding gun is adjusted so that the focus of the laser welding gun is located on the edge line where the aluminum strip and the foam aluminum plate are crimped. The laser welding gun is turned on so that the focus of the laser welding gun is welded from one side to the other side along the edge line in the width direction of the aluminum strip. After the welding is completed, the active roller rotates so that the welded aluminum strip and the foam aluminum plate move the distance of the weld seam, and the welding of the next weld seam is carried out. After the welding, the aluminum strip pressed by the active roller forms an aluminum plate; S7. After welding, the welded all-aluminum composite plate is clamped by the passive roller behind the active roller; 1 / 3±1 / 5 of the welding spot is used to melt the aluminum strip, and 2 / 3±1 / 5 of the welding spot is used to melt the foam aluminum plate; the melting thickness of the weld on one side of the aluminum plate is 0.05-0.3 mm, and the sum of the softening thickness and the melting thickness is less than 2 / 3 of the thickness of the aluminum plate, so that the outward side of the aluminum plate is flat and has no softening marks; The connection structure is welding between aluminum plates, which are polished and smoothed after welding. The welding is angled welding between two all-aluminum composite plates, and the two all-aluminum composite plates are welded through at least two welds.

2. The connection structure of the all-aluminum composite sheet for furniture according to claim 1, characterized in that: The angled weld is an L-shaped connection.

3. The connection structure of the all-aluminum composite sheet for furniture according to claim 2, characterized in that: The L-shaped connection is welding between the inner aluminum plates of the two all-aluminum composite plates and welding between the outer aluminum plates.

4. The connection structure of the all-aluminum composite sheet for furniture according to claim 2, characterized in that: The L-shaped connection is that the inner aluminum plate of the all-aluminum composite plate B extends to the outer plate of the all-aluminum composite plate A, the two inner aluminum plates are welded together, and the two outer aluminum plates are welded together.

5. The connection structure of the all-aluminum composite sheet for furniture according to claim 2, characterized in that: The L-shaped connection is that the inner aluminum plate of the all-aluminum composite plate B extends to the outer plate of the all-aluminum composite plate A, and the inner aluminum plate of the all-aluminum composite plate B is welded to the aluminum plates on both sides of the all-aluminum composite plate A.

6. The connection structure of the all-aluminum composite sheet for furniture according to claim 1, characterized in that: The angled weld is a T-shaped connection.

7. The connection structure of the all-aluminum composite sheet for furniture according to claim 6, characterized in that: The T-shaped connection is formed by welding two aluminum plates at the ends of the all-aluminum composite plate A to an aluminum plate on one side of the all-aluminum composite plate B.

8. The connection structure of the all-aluminum composite board for furniture according to claim 6, characterized in that: The T-shaped connection is that the two aluminum plates at the ends of the all-aluminum composite plate A pass through the aluminum plate and the foam aluminum plate on one side of the all-aluminum composite plate B, and are welded to the passed aluminum plates.

9. A connection structure of an all-aluminum composite sheet for furniture according to any one of claims 1 to 8, characterized in that: The all-aluminum composite plate C is welded on the side of the angled connection of the plates to form a three-dimensional connection.

10. The connection structure of the all-aluminum composite sheet for furniture according to claim 9, characterized in that: At least one double-head barb is arranged at the position where the foam aluminum plates of the two all-aluminum composite plates contact each other.

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