A full aluminum composite plate for furniture

Abstract

The present invention relates to the technical field of composite metal sheets, and more specifically, to an all-aluminum composite sheet for furniture. The sheet comprises a foam aluminum sheet, characterized in that aluminum sheets are laser-welded on both sides of the foam aluminum sheet. Laser welding minimizes deformation of the aluminum sheet, resulting in a smooth surface on the finished workpiece.

Description

Technical Field

[0001] The present invention relates to the technical field of composite metal plates, and in particular to 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 it, in which brazing is performed in a vacuum chamber to form a whole at high temperature. They can also be formed by 3D printing, such as 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 aluminum plates and foam aluminum plates 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 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 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 little 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 problems and provides an all-aluminum composite plate for furniture.

[0006] The object of the present invention is achieved in the following manner: an all-aluminum composite board for furniture, comprising a foam aluminum board, and aluminum boards are laser-welded on both sides of the foam aluminum board.

[0007] The thickness of the foam aluminum plate is 5-50 mm, and the thickness of the aluminum plate is 0.4-2 mm.

[0008] The distance between the welds is 0-20 mm, and the welds are welded along the width direction of the aluminum plate.

[0009] The diameter of the weld seam is consistent with the diameter of the light spot at the laser focus, and the spacing of the weld seams is consistent with the average diameter of the foam holes in the foam aluminum plate.

[0010] 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, making the other side of the aluminum plate smooth and free of softening marks.

[0011] The foamed aluminum plate is pure aluminum or an aluminum alloy, and the aluminum plate is pure aluminum or an aluminum alloy.

[0012] Compared with the prior art, the all-aluminum composite plate of the present invention is welded by laser, so the deformation of the aluminum plate is small, and the surface of the processed workpiece is smooth. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic structural diagram of the all-aluminum composite plate of the present invention;

[0014] Figure 2 This is a schematic diagram of the structure at the beginning of the preparation of the all-aluminum composite plate;

[0015] Figure 3 It is a structural diagram of the preparation process of the all-aluminum composite plate;

[0016] Figure 4 yes Figure 3 An enlarged view of point A (welding point);

[0017] Figure 5 It is an L-shaped connection structure with an angled angle of all-aluminum composite panels;

[0018] Figure 6 It is an L-shaped connection structure with a notched corner of the all-aluminum composite plate;

[0019] Figure 7 It is an L-shaped connection structure with rounded corners of all-aluminum composite panels;

[0020] Figure 8 It is the first T-shaped connection structure of all-aluminum composite panels;

[0021] Figure 9 It is the second T-type connection structure of all-aluminum composite panels;

[0022] Figure 10 It is the third T-type connection structure of all-aluminum composite panels;

[0023] Figure 11 It is a schematic diagram of the structure in which double-headed barbs are arranged between the foam aluminum plates.

[0024] 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

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0026] In the present invention, unless otherwise expressly specified 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 to 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 device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0027] Example 1:

[0028] 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.

[0029] A method for preparing an all-aluminum composite plate for furniture comprises the following steps:

[0030] (1) Prepare a foam aluminum plate 11 with a thickness of 5-50 mm;

[0031] (2) flushing the outer surface of the foam aluminum plate 11 with a high-pressure air flow;

[0032] (3) The cleaned foam aluminum plate 11 is clamped and fixed by the passive roller 4;

[0033] (4) Prepare two rolls of 0.4-2 mm thick aluminum strip 2;

[0034] (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;

[0035] (6) A laser welding gun 5 that moves up and down is set 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 pressed together. The laser welding gun 5 is turned on and 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 to move the welded aluminum strip and the foam aluminum plate 11 by the distance of the weld seam, and the next weld seam is welded. After welding, the aluminum strip pressed by the active roller 3 forms an aluminum plate 12;

[0036] (7) After welding, the welded all-aluminum composite plate 1 is clamped by the passive roller 4 behind the active roller 3.

[0037] Example 2: This example is a further limitation of Example 1. 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.

[0038] Example 3: This example is a further limitation of Example 1. The distance between the two welds 13 is 0-20 mm. The welds are welded along the width direction of the aluminum plate. When the distance between the two welds 13 is 0, it means that after a weld 13 is completed, the active roller 3 feeds the distance of a light spot (i.e., a weld 13) so that the weld 13 is tightly attached to achieve complete welding.

[0039] 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.

[0040] Example 5: This example is a further limitation of Example 4. The melt 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 melt 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 softening marks. Preferably, the sum of the softened thickness 122 and the melt thickness 121 is between 1 / 3-2 / 3 of the thickness of the aluminum plate 12.

[0041] Example 6: This example is a further limitation of Example 1. The foam aluminum plate 11 is pure aluminum or aluminum alloy, and the aluminum plate 12 is pure aluminum or aluminum alloy.

[0042] Example 7: This example is a further limitation of Example 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.

[0043] Example 8: This example is a further limitation of Example 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 easier to deform, this setting can not only reduce the deformation thickness of the aluminum strip, but also speed up the welding speed.

[0044] Example 9: This example further limits Example 1, and the lateral moving speed of the laser welding gun 5 is 10-600 mm / s.

[0045] 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 to be the aluminum plate 12.

[0046] Because 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 smaller part of the aluminum plate to soften. Most of the aluminum plate does not melt or soften, and can maintain its original flat shape. Therefore, laser welding has little deformation and can make the surface of the processed workpiece smooth. In this way, compared with existing technologies, it can greatly improve production capacity and make the production of all-aluminum composite panels faster.

[0047] Example 11: A connection structure of an all-aluminum composite panel for furniture, comprising an all-aluminum composite panel 1, wherein the two sides of the all-aluminum composite panel 1 are aluminum panels 12, and the middle is a foam aluminum panel 11. The aluminum panels 12 and the foam aluminum panels 11 are laser welded to each other, and the connection structure is the welding between the aluminum panels 12 and the aluminum panels 12, which are polished and smoothed after welding. The welding is an angled welding between the two all-aluminum composite panels 1, and the two all-aluminum composite panels 1 are welded by at least two connecting welds 7.

[0048] Example 12: This example is a further limitation of Example 11, and the angled welding is an L-shaped connection.

[0049] Example 13: This example is a further limitation of Example 12. The L-shaped connection can be Figure 5 As shown, the bevel 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 junction 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.

[0050] Example 14: This example is a further limitation of Example 12. The L-shaped connection can also be as follows: Figure 6 As shown, a piece of the all-aluminum composite plate A61 is hollowed out to form a portion that matches the all-aluminum composite plate B62. The inner aluminum plate 12 of the all-aluminum composite plate B62 extends to the outer plate of the all-aluminum composite plate A61. The two inner aluminum plates are welded together, and the two outer aluminum plates are welded together.

[0051] Example 15: This example is a further limitation of Example 12. The L-shaped connection can 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.

[0052] Example 16: This example is a further limitation of Example 11, and the angled welding is a T-type connection.

[0053] Example 17: This example further defines Example 16. The T-type connection is as follows: Figure 8 or Figure 10 As shown, the two aluminum plates 12 at the ends 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 Figure 10 The difference is Figure 8 The aluminum foam plates 11 of the all-aluminum composite plate A61 and the all-aluminum composite plate B62 are in contact with each other.

[0054] Example 18: This example further defines Example 16. The T-type connection can also be as follows: Figure 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.

[0055] 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 welding logic is based on the above-mentioned L-type connection and T-type connection. After a portion 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.

[0056] Example 20: Figure 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.

[0057] 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 and is not a limitation on the angle. As long as it is based on the connection logic described in the present invention, it should fall within the scope of protection of the present invention.

[0058] All panel furniture can be connected through several all-aluminum composite panels 1 based on the above connection logic.

[0059] 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, and these should also be regarded as the scope of protection of the present invention.

Claims

1. An all-aluminum composite board for furniture, comprising a foam aluminum board, characterized in that: Aluminum plates are laser welded on both sides of the foam aluminum plate; The distance between the welds is 0-20 mm, and the welds are welded along the width of the aluminum plate; The diameter of the weld is consistent with the diameter of the spot at the laser focus; The melt thickness of the weld on one side of the aluminum plate is 0.05-0.3 mm, the sum of the softened thickness and the melt thickness is less than 2 / 3 of the thickness of the aluminum plate, the diameter of the cross-section of the laser welding welding spot is 0.2-0.5 mm, 1 / 3±1 / 5 of the welding spot is used to melt the aluminum plate, and 2 / 3±1 / 5 of the welding spot is used to melt the foam aluminum plate, so that the other side of the aluminum plate is flat and has no softening marks.

2. The all-aluminum composite sheet for furniture according to claim 1, characterized in that: The thickness of the foam aluminum plate is 5-50 mm, and the thickness of the aluminum plate is 0.4-2 mm.

3. The all-aluminum composite sheet for furniture according to any one of claims 1 or 2, characterized in that: The foam aluminum plate is pure aluminum or aluminum alloy, and the aluminum plate is pure aluminum or aluminum alloy.

4. The all-aluminum composite sheet for furniture according to claim 1, characterized in that: The spacing of the welds is consistent with the average diameter of the foam holes in the foam aluminum plate.

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