A welding fixing and deformation control device for aluminum alloy three-dimensional lattice sandwich plate

Abstract

The application discloses a kind of welding fixing and deformation control device of aluminum alloy three-dimensional lattice sandwich plate, including longitudinal support adjusting device, transverse support device, external clamping device, internal pressing device, three-dimensional lattice sandwich plate unit;Longitudinal support adjusting device is used to support external clamping device;The transverse support device is used to support its internal pressing device;External clamping device is used to carry out preliminary positioning to aluminum alloy lattice sandwich plate;Internal pressing device is used to carry out local pressing to the core plate inside three-dimensional lattice sandwich plate unit;Three-dimensional lattice sandwich plate unit is the expansion lattice sandwich structure plate to be welded.The whole device inside and outside double clamping fixation of the application, it is applicable to multilayer structure and different size especially larger size lattice structure plate welding device, under the premise of preventing post-welding thermal deformation, solve the positioning difficulty in the process of small size plate welding extension to multilayer large plate and the problems such as poor continuity of lattice sandwich plate after splicing, low universality.

Description

Technical Field

[0001] This invention belongs to the field of aluminum alloy manufacturing technology, specifically relating to a welding, fixing and deformation control device for an aluminum alloy three-dimensional lattice sandwich panel. Background Technology

[0002] Metal three-dimensional lattice structures are a new type of lightweight, high-strength, and multifunctional structure that has emerged in the last decade or so. They are mainly composed of micro-elements such as rods and plates arranged in a repeating pattern, similar in structure to a three-dimensional space frame in architecture, only much smaller in size. Currently, commonly used methods for fabricating three-dimensional lattice structures include investment casting, perforated mesh stamping-brazing, steel mesh folding-brazing, and additive manufacturing. These methods are difficult to manufacture and typically result in small-scale production. In practical engineering applications, large-size aluminum alloy three-dimensional lattice structure panels are mainly assembled by splicing. However, there is still a lack of effective welding and fixing devices for splicing multi-layered, large-size aluminum alloy three-dimensional lattice structure panels.

[0003] Aluminum alloys possess advantages such as light weight, high strength, and corrosion resistance, making them well-suited for the lightweight and easily formable characteristics of three-dimensional lattice structures. Therefore, aluminum alloys are widely used in the fabrication of three-dimensional lattice structures. However, due to the high thermal conductivity and large heat capacity, large coefficient of linear expansion, low melting point, and low high-temperature strength of aluminum alloys, significant local deformation easily occurs during welding, resulting in poor continuity and low versatility in the splicing of aluminum alloy three-dimensional lattice sandwich panels. Currently, the lack of welding fixation and deformation control devices for splicing aluminum alloy three-dimensional lattice sandwich panels is a bottleneck restricting the widespread application of aluminum alloy three-dimensional lattice sandwich structures.

[0004] In existing technologies, such as the patent with publication number CN202110575424.0 entitled "A Manufacturing Method for a Three-Dimensional Lattice Structure of Titanium-Aluminum Alloy," a titanium-aluminum alloy upper panel, a titanium-aluminum alloy lower panel, multiple joints, and multiple titanium-aluminum alloy ribs are processed. Then, the two ends of each rib are connected to the upper panel and the lower panel, followed by welding to form the structure. Finally, the welded preform is machined into a finished three-dimensional lattice structure. However, this processing method does not take into account the high thermal conductivity and large heat capacity of aluminum alloy, which makes it prone to significant deformation and poor stability after welding. Furthermore, this method requires sophisticated equipment, making it difficult to meet the requirements when splicing and expanding large aluminum alloy three-dimensional lattice sandwich panels. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to address the shortcomings of the prior art by providing a welding, fixing and deformation control device for aluminum alloy three-dimensional lattice sandwich panels. This device can perform double clamping and fixing from the inside and outside, and is suitable for welding multi-layer structures and lattice structure panels of different sizes, especially larger sizes. It can control the large thermal deformation generated during the welding process, while ensuring that the positioning difficulties are resolved during the welding process of extending to large-size multi-layer aluminum alloy lattice structure panels.

[0006] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows:

[0007] A welding, fixing, and deformation control device for an aluminum alloy three-dimensional lattice sandwich panel includes a longitudinal support adjustment device, a transverse support device, an external clamping device, an internal pressing device, and a three-dimensional lattice sandwich panel unit.

[0008] The longitudinal support adjustment device is used to support the external clamping device;

[0009] The lateral support device is used to support its internal clamping device;

[0010] The external clamping device is used for the initial positioning of the aluminum alloy lattice sandwich panel.

[0011] The internal clamping device is used to locally clamp the interior of the core plate of the three-dimensional lattice sandwich panel unit;

[0012] The three-dimensional lattice sandwich panel unit is an extended lattice sandwich structure panel to be welded.

[0013] To optimize the above technical solution, the specific measures also include:

[0014] The aforementioned longitudinal support adjustment device includes a slide rod, with a base connected to the slide rod and fixed to the floor by screws. The screw fixing position can be adjusted according to actual needs. Limit plates are symmetrically arranged on both sides of the slide rod to prevent excessive movement. Arc-shaped sliding grooves are symmetrically arranged on both sides of the longitudinal first support base, and the arc-shaped sliding grooves slide in cooperation with the slide rod. A drive motor is arranged in the middle of the longitudinal first support base. The drive motor drives the arc-shaped sliding grooves to move longitudinally along the slide rod through the belt inside the longitudinal first support base, adjusting the spacing between the longitudinal support plates. This can be adjusted for original three-dimensional lattice sandwich panels of different widths. Two identical longitudinal support plates are arranged on the upper part of the longitudinal first support base.

[0015] The aforementioned longitudinal support adjustment device consists of two identical pieces placed parallel to each other on the floor.

[0016] The aforementioned lateral support device includes a lateral support base, which is fixed on the floor, and a lateral support plate is fixedly installed on the upper end of the lateral support base.

[0017] The two identical transverse support devices are fixed parallel to each other on the floor to stably support the internal pressing device, with the upper pressing component and the lower pressing component of the internal pressing device fixedly connected in the middle.

[0018] The aforementioned external clamping device includes an upper clamping component and a lower clamping component. The upper clamping component includes a connecting rod, which is fixedly connected to a longitudinal support plate. A square chuck is connected to the inner side of the connecting rod. Square pads are provided on the inner side of the top of both ends of the square chuck. Rubber suction cups are evenly arranged on the inner side of the square pads to increase friction. The inner sides of the two square pads of the upper clamping component are respectively connected to the upper panel and the lower panel of the original three-dimensional lattice sandwich layer. The two square pads of the lower clamping component are only connected to the two surfaces of the lower panel of the vertical extension plate. The other structures of the lower clamping component are the same as those of the upper clamping component.

[0019] The aforementioned internal clamping device is divided into an upper clamping component and a lower clamping component;

[0020] The upper pressing component includes a square slide groove, inside which four identical telescopic rods are evenly arranged in an array and are longitudinally adjustable. The telescopic rods are slidably connected to the slide groove. Adjusting nuts are provided at the bottom of the telescopic rods to adjust the spacing between them, making it suitable for core boards with different internal structures. The telescopic rods are slidably connected to the slide groove, and adjusting nuts are provided at the bottom of the telescopic rods to adjust the spacing between them, making it suitable for core boards with different internal structures. A first telescopic rod, a second telescopic rod, and a third telescopic rod are nested inside the telescopic rods in sequence. A hydraulic support rod is evenly distributed on the upper and lower sides of the first, second, and third telescopic rods, respectively pressing and contacting the upper and lower panels of the original three-dimensional lattice sandwich layer to prevent local thermal deformation during the welding process.

[0021] The hydraulic support rods in the lower layer clamping component are connected to the lower panel of the original three-dimensional lattice sandwich layer and the lower panel of the vertical extension plate, respectively. Together with the upper layer clamping, they play a local clamping role to prevent thermal deformation. The other structures of the lower layer clamping component are the same as those of the upper layer clamping component.

[0022] The aforementioned three-dimensional lattice sandwich panel unit includes an original three-dimensional lattice sandwich panel, a vertical extension panel, and a horizontal extension panel. The original three-dimensional lattice sandwich panel is a welding connection panel. The top of the core panel inside the vertical extension panel is at an appropriate distance from the bottom panel of the original three-dimensional lattice sandwich panel for welding. The core panel is composed of the same lattice cell structure. An I-beam is set between the original three-dimensional lattice sandwich panel and the horizontal extension panel for welding.

[0023] The present invention has the following beneficial effects:

[0024] The welding device of the present invention features double clamping and fixing both inside and outside the device. It is suitable for welding multi-layer structures and lattice structure plates of different sizes, especially larger sizes. While preventing thermal deformation after welding, it solves the problems of positioning difficulties in the process of welding small-sized plates into multi-layer large plates, as well as the problems of poor continuity and low universality of the lattice sandwich panels after splicing.

[0025] 1. The longitudinal first support base of the present invention can be driven by a drive motor to move its internal drive arc groove along the longitudinal direction of the slide rod, thereby adjusting the spacing between the longitudinal support plates and ensuring that the device can be applied to original three-dimensional lattice sandwich panels of different widths, thus having strong applicability.

[0026] 2. The external clamping device of the present invention includes an upper clamping component and a lower clamping component. The inner side of the square pad in the upper clamping component is connected to the upper panel and the lower panel of the original three-dimensional lattice sandwich layer, respectively. The two square pads of the lower clamping component are only connected to the two surfaces of the lower panel of the vertical extension plate, and perform initial positioning of the lattice sandwich plate to be welded and extended.

[0027] 3. The internal clamping device of the present invention includes an upper clamping component and a lower clamping component. In the upper clamping component, the upper and lower hydraulic support rods of the telescopic rod are respectively clamped and contacted with the upper panel and the lower panel of the original three-dimensional lattice sandwich layer. In the lower clamping component, the hydraulic support rods are respectively clamped and contacted with the lower panel of the original three-dimensional lattice sandwich layer and the lower panel of the vertical extension plate. The internal clamping controls the uneven small deformation caused by local overheating during welding and reduces the influence of welding residual stress.

[0028] 4. The three-dimensional lattice sandwich panel unit of the present invention includes three parts: an original three-dimensional lattice sandwich panel, a vertical extension plate, and a horizontal extension plate. The top of the core plate inside the vertical extension plate maintains an appropriate welding distance with the bottom panel of the original three-dimensional lattice sandwich panel. The horizontal extension plate is connected to the original three-dimensional lattice sandwich panel through an I-beam and maintains an appropriate distance before welding. The splicing problem of poor continuity and low universality of metal lattice sandwich structure is solved by splicing with I-beams. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the operation of the device of the present invention;

[0030] Figure 2 This is a front view of the device of the present invention;

[0031] Figure 3 This is a left view of the device of the present invention;

[0032] Figure 4 This is a top view of the device of the present invention;

[0033] Figure 5 for Figure 4 Sectional view at point AA;

[0034] Figure 6 for Figure 5 A magnified view of a section at point B in the middle;

[0035] The markings in the diagram are as follows: 1-Longitudinal support adjustment device, 2-Transverse support device, 3-External clamping device, 4-Internal pressing device, 5-Three-dimensional lattice sandwich panel unit, 6-Base plate, 101-Slide rod, 102-Base, 103-Screw, 104-Limiting plate, 105-Longitudinal first support base, 106-Arc-shaped slide groove, 107-Drive motor, 108-Longitudinal support plate, 201-Transverse support base, 202-Transverse support plate, 203-Reinforcing rib, 301-Upper clamping component, 302-Lower clamping component, 303-Connecting rod, 304-Square chuck, 305-Square pad. 306-Rubber suction cup, 401-Upper layer clamping component, 402-Lower layer clamping component, 403-Square slide groove, 404-Telescopic rod, 405-Adjustable screw, 406-First telescopic rod, 407-Second telescopic rod, 408-Third telescopic rod, 409-Hydraulic support rod, 501-Original three-dimensional lattice sandwich panel, 501a-Original three-dimensional lattice sandwich upper panel, 501b-Original three-dimensional lattice sandwich lower panel, 502-Vertical extension plate, 502a-Vertical extension plate lower panel, 503-Horizontal extension plate, 504-Core board, 505-Lattice cell structure, 506-I-beam. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0037] Although the steps in this invention are arranged by reference numerals, this is not intended to limit the order of the steps. Unless the order of the steps is explicitly stated or the execution of a step requires other steps as a basis, the relative order of the steps can be adjusted. It is understood that the term "and / or" as used herein refers to and covers any and all possible combinations of one or more of the associated listed items.

[0038] like Figure 1 As shown, the present invention proposes an adjustable-size vertical and horizontal container side panel welding positioning device, including a longitudinal support adjustment device 1, a transverse support device 2, an external clamping device 3, an internal pressing device 4, and a three-dimensional dot matrix sandwich panel unit 5.

[0039] The longitudinal support adjustment device 1 is used to support the external clamping device 3. For example... Figure 1 , 2As shown in Figures 3 and 5, the longitudinal support adjustment device 1 includes a slide rod 101. The slide rod 101 is connected to a base 102 and fixed to the floor 6 by screws 103. The fixing position of the screws 103 can be adjusted according to actual needs. Limit plates 104 are symmetrically arranged on both sides of the slide rod 101 to prevent excessive movement. Arc-shaped grooves 106 are symmetrically arranged on both sides of the longitudinal first support base 105. The arc-shaped grooves 106 slide with the slide rod 101. A drive motor 107 is arranged in the middle of the longitudinal first support base 105. The drive motor 107 is connected to the longitudinal support adjustment device 1 by screws 103 and screws 104. The belt-driven arc-shaped slide groove 106 inside the first support base 105 moves longitudinally along the slide rod 101, adjusting the spacing between the longitudinal support plates 108. This allows for adjustment of the original three-dimensional lattice sandwich panel 501 of different widths, ensuring that the device is applicable to original three-dimensional lattice sandwich panels 501 of different widths and lattice panels of different sizes. Two identical longitudinal support plates 108 are provided on the upper part of the first longitudinal support base 105, and the longitudinal support adjustment device 1 is divided into two identical pieces placed parallel to each other on the floor 6.

[0040] The lateral support device 2 is used to support its internal clamping device 4. For example... Figure 1 , 2 As shown in Figures 3, 4, and 5, the transverse support device 2 includes a transverse support base 201, which is fixed to the floor 6. A transverse support plate 202 is fixedly installed on the upper end of the transverse support base 201. Reinforcing ribs 203 are symmetrically arranged on both sides of the transverse support plate 202. The transverse support device 2 consists of two identical pieces placed parallel to each other on the floor 6. That is, two identical transverse support devices 2 are fixed parallel to each other on the floor 6 for stable support. The two identical transverse support devices 2 are fixed parallel to each other on the floor 6 for stable support of the internal pressing device 4. The upper pressing component 401 and the lower pressing component 402 of the internal pressing device 4 are fixedly connected in the middle.

[0041] External clamping device 3 is used for initial positioning of the aluminum alloy dot matrix structure plate. For example... Figure 1 , 3 As shown in Figures 4 and 5, the external clamping device 3 includes an upper clamping component 301 and a lower clamping component 302.

[0042] The upper clamping component 301 includes a connecting rod 303, which is fixedly connected to the longitudinal support plate 108. The connecting rod 303 is fixedly connected to the longitudinal support plate 108. A square chuck 304 is connected to the inner side of the connecting rod 303. Square pads 305 are provided on the inner side of the top of both ends of the square chuck 304. Rubber suction cups 306 are evenly provided on the inner side of the square pads 305 to increase the friction force. The inner sides of the two square pads 305 of the upper clamping component 301 are respectively connected to the upper panel 501a and the lower panel 501b of the original three-dimensional lattice sandwich layer.

[0043] The two square pads 305 of the lower clamping component 302 are only connected to the two surfaces of the lower panel 502a of the vertical extension plate 502. The other structures of the lower clamping component 302 are the same as those of the upper clamping component 301. Both components simultaneously perform preliminary external clamping and positioning on the three parts to be welded: the original three-dimensional lattice sandwich panel 501, the vertical extension plate 502, and the horizontal extension plate 503.

[0044] The internal clamping device 4 is used to locally clamp the interior of the core board 504. For example... Figure 1 , 2 As shown in Figures 4, 5, and 6, the internal clamping device 4 has a two-layer structure: an upper clamping component 401 and a lower clamping component 402.

[0045] The upper pressing component 401 includes a square slide groove 403. Four identical telescopic rods 404 are evenly arranged in an array inside the square slide groove 403 and are longitudinally adjustable. The telescopic rods 404 are slidably connected to the slide groove. An adjusting nut 405 is provided at the bottom of the telescopic rods 404 to adjust the spacing between the telescopic rods, so that it can be used for core plates 504 with different internal structures. The telescopic rods 404 are slidably connected to the slide groove. An adjusting nut 405 is provided at the bottom of the telescopic rods 404 to adjust the spacing between the telescopic rods, so that it can be used for core plates 504 with different internal structures. A first telescopic rod 406, a second telescopic rod 407, and a third telescopic rod 408 are nested in sequence inside the telescopic rods 404. Three hydraulic support rods 409 are evenly arranged on the upper and lower sides of the first telescopic rods 406, the second telescopic rods 407, and the third telescopic rods 408, respectively, pressing and contacting the upper panel 501a and the lower panel 501b of the original three-dimensional lattice sandwich layer to prevent local thermal deformation during the welding process.

[0046] The hydraulic support rods 409 in the lower layer clamping component 402 are connected to the original three-dimensional lattice sandwich panel 501b and the lower panel 502a of the vertical extension plate, respectively. Together with the upper layer clamping, they provide local clamping to prevent thermal deformation. The other structures of the lower layer clamping component 402 are the same as those of the upper layer clamping component 401. That is, the hydraulic support rods 409 in the lower layer clamping component 402 are in clamping contact with the original three-dimensional lattice sandwich panel 501b and the lower panel 502a of the vertical extension plate, respectively. Through internal clamping, deformation is controlled, reducing uneven small deformations caused by local overheating during welding, reducing the influence of welding residual stress, controlling the local deformation of the aluminum alloy three-dimensional lattice sandwich panel during welding, and ensuring the reliability and stability of the splicing between the aluminum alloy three-dimensional lattice sandwich panels.

[0047] Unit 5 of the three-dimensional lattice sandwich panel is an extended lattice sandwich structure panel to be welded. For example... Figure 1 , 2As shown, the three-dimensional lattice sandwich panel unit 5 includes three parts: an original three-dimensional lattice sandwich panel 501, a vertical extension plate 502, and a horizontal extension plate 503. The original three-dimensional lattice sandwich panel 501 is the connecting plate to be welded. The top of the core plate 504 inside the vertical extension plate 502 is kept at an appropriate distance from the bottom panel 501b of the original three-dimensional lattice sandwich panel for welding. The core plate 504 is composed of identical lattice cell structures 505. An I-beam 506 is provided between the original three-dimensional lattice sandwich panel 501 and the horizontal extension plate 503 for welding. That is, the horizontal extension plate 503 and the original three-dimensional lattice sandwich panel 501 are connected by the I-beam 506 and kept at an appropriate distance for welding.

[0048] In summary, this invention designs a welding device for aluminum alloy three-dimensional lattice sandwich panels, comprising a longitudinal support adjustment device, a transverse support device, an external clamping device, an internal pressing device, and a three-dimensional lattice sandwich panel unit. The longitudinal and transverse support devices allow the device to be adapted to aluminum alloy lattice sandwich panels of different sizes to be welded, while simultaneously supporting the external clamping and internal pressing devices. The upper and lower clamping components of the external clamping device provide initial external clamping and positioning for the original three-dimensional lattice sandwich panel, the vertical extension plate, and the transverse extension plate to be welded, respectively. Then, the internal pressing device locally presses the upper and lower parts of the core panel. After positioning and pressing, the splicing between the sandwich structures can be completed using CO2 gas shielded welding. The use of internal and external pressing methods fixes the aluminum alloy three-dimensional lattice sandwich panel during splicing and controls deformation during welding, ensuring product quality and possessing engineering application value.

[0049] The welding method using the welding apparatus of the present invention is as follows:

[0050] Before welding, the longitudinal support adjustment device 1 is adjusted according to the size of the plate to be welded. The belt drive arc-shaped slide 106 inside the longitudinal first support base 105 is controlled by the drive motor 107 to move longitudinally along the slide rod 101, so that the device can be used for dot matrix plates of different sizes. Then, the upper clamping component 301 and the lower clamping component 3 of the external clamping device 3 are used to perform preliminary external clamping and positioning of the original three-dimensional dot matrix sandwich plate 501, the vertical extension plate 502, and the horizontal extension plate 503 to be welded. During the clamping process, it is ensured that the square pads 305 are set on the inner side of the top of both ends of the square chuck 304, parallel to the dot matrix plate to be welded, and the rubber suction cups 306 on the inner side of the square pads 305 are in close contact with the plate to be welded to prevent slippage. Next, the internal clamping device 4 is controlled to locally clamp the inside of the core plate 504. The spacing between the four identical telescopic rods 404 inside the square slide groove 403 is adjusted to accommodate different internal conditions of the core plate 504. The adjusting nut 405 is tightened to ensure that the telescopic rods 404 remain stable. The transversely connected I-beam 506 is placed parallel between the transverse extension plate 503 and the original three-dimensional lattice sandwich plate 501. The first telescopic rod 406, the second telescopic rod 407, and the third telescopic rod 408 are opened to extend into the gap inside the core plate 504. After reaching the designated position, the hydraulic support rod 409 is opened to clamp the local area to be welded. The top hydraulic rod is in close contact with the upper and lower inner surfaces of the I-beam 506 to ensure that the I-beam remains fixed. At the same time, the local clamping reduces the local deformation of the aluminum alloy during welding and prevents the residual stress caused by large local thermal deformation during welding from affecting the stability of the welded component.

[0051] After positioning and clamping, welding begins. The connection between the metal lattice sandwich structure panel and the core can be completed using laser deep penetration welding, thereby achieving vertical expansion of the lattice sandwich panel. The splicing between the sandwich structures uses CO2 gas shielded welding to weld the original three-dimensional lattice structure panel and the horizontal extension plate together via I-beams. Using laser deep penetration welding also allows the device to meet the needs of future automated and mass production. Due to environmental factors during the welding process, CO2 gas shielded welding is used between the sandwich structures, offering versatility and simplifying the splicing and installation process.

[0052] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0053] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A welding, fixing, and deformation control device for an aluminum alloy three-dimensional lattice sandwich panel, characterized in that, It includes a longitudinal support adjustment device (1), a transverse support device (2), an external clamping device (3), an internal pressing device (4), and a three-dimensional lattice sandwich panel unit (5). The longitudinal support adjustment device (1) is used to support the external clamping device (3); the longitudinal support adjustment device (1) includes a slide rod (101), and the base (102) connected to the slide rod (101) is fixed to the floor (6) by screws (103). The fixing position of the screws (103) can be adjusted according to actual needs. Limit plates (104) are symmetrically arranged on both sides of the slide rod (101) to prevent movement beyond the limit. Arc-shaped grooves (106) are symmetrically arranged on both sides of the longitudinal first support base (105). The slide rod (101) slides together with the slide rod (101). A drive motor (107) is provided in the middle of the longitudinal first support base (105). The drive motor (107) drives the arc-shaped slide groove (106) to move longitudinally along the slide rod (101) through the belt inside the longitudinal first support base (105). The spacing between the longitudinal support plates (108) can be adjusted for the original three-dimensional lattice sandwich panel (501) of different widths. Two identical longitudinal support plates (108) are provided on the upper part of the longitudinal first support base (105). The lateral support device (2) is used to support its internal clamping device (4); The external clamping device (3) is used for preliminary positioning of the aluminum alloy three-dimensional lattice sandwich panel; the external clamping device (3) includes an upper clamping component (301) and a lower clamping component (302). The upper clamping component (301) includes a connecting rod (303), which is fixedly connected to the longitudinal support plate (108). A square clamp (304) is connected to the inner side of the connecting rod (303), and square pads (305) are provided on the inner side of the top of both ends of the square clamp (304). The inner side of the square pad (305) is uniformly provided with rubber suction cups (306) to increase the friction force. The inner sides of the two square pads (305) of the upper clamping component (301) are connected to the upper panel (501a) and the lower panel (501b) of the original three-dimensional lattice sandwich layer, respectively. The two square pads (305) of the lower clamping component (302) are only connected to the two surfaces of the lower panel (502a) of the vertical extension plate (502). The other structures of the lower clamping component (302) are the same as those of the upper clamping component (301). The internal pressing device (4) is used to locally press the core plate (504) of the three-dimensional lattice sandwich panel unit (5); the internal pressing device (4) is divided into an upper pressing component (401) and a lower pressing component (402); the upper pressing component (401) includes a square slide groove (403), and four identical telescopic rods (404) are evenly arranged in an array and are longitudinally adjustable inside the square slide groove (403). The telescopic rods (404) are slidably connected to the slide groove, and an adjusting nut (405) is provided at the bottom of the telescopic rods (404) to adjust the spacing between the telescopic rods so that it can be applied to core plates (504) with different internal structures. The grooves are slidably connected. The bottom of the telescopic rod (404) is provided with an adjusting nut (405) to adjust the distance between the telescopic rods so that it can be used for core plates (504) with different internal structures. The first telescopic rod (406), the second telescopic rod (407), and the third telescopic rod (408) are nested in sequence inside the telescopic rod (404). Three hydraulic support rods (409) are evenly distributed on the upper and lower sides of the first telescopic rod (406), the second telescopic rod (407), and the third telescopic rod (408), respectively, and are pressed into contact with the upper panel (501a) and the lower panel (501b) of the original three-dimensional lattice sandwich layer to prevent local thermal deformation during the welding process. The three-dimensional lattice sandwich panel unit (5) is an extended lattice sandwich structure plate to be welded, namely, an aluminum alloy three-dimensional lattice sandwich panel to be welded.

2. The welding, fixing, and deformation control device for an aluminum alloy three-dimensional lattice sandwich panel according to claim 1, characterized in that, The longitudinal support adjustment device (1) is divided into two identical pieces and placed parallel to each other on the floor (6).

3. The welding, fixing, and deformation control device for an aluminum alloy three-dimensional lattice sandwich panel according to claim 1, characterized in that, The transverse support device (2) includes a transverse support base (201), which is fixed on the floor (6). A transverse support plate (202) is fixedly installed on the upper end of the transverse support base (201).

4. The welding, fixing, and deformation control device for an aluminum alloy three-dimensional lattice sandwich panel according to claim 3, characterized in that, Two identical transverse support devices (2) are fixed in parallel on the floor (6) to stably support the internal pressing device (4), with the upper pressing component (401) and the lower pressing component (402) of the internal pressing device (4) fixedly connected in the middle.

5. The welding, fixing, and deformation control device for an aluminum alloy three-dimensional lattice sandwich panel according to claim 1, characterized in that, The hydraulic support rod (409) in the lower layer pressing component (402) is connected to the lower panel (501b) of the original three-dimensional lattice sandwich layer and the lower panel (502a) of the vertical extension plate respectively. Together with the upper layer pressing, it plays a local pressing role to prevent thermal deformation. The other structures of the lower layer pressing component (402) are the same as those of the upper layer pressing component (401).

6. The welding, fixing, and deformation control device for an aluminum alloy three-dimensional lattice sandwich panel according to claim 1, characterized in that, The three-dimensional lattice sandwich panel unit (5) includes an original three-dimensional lattice sandwich panel (501), a vertical extension plate (502), and a horizontal extension plate (503). The original three-dimensional lattice sandwich panel (501) is a connecting plate to be welded. The top of the core plate (504) inside the vertical extension plate (502) is at an appropriate distance from the bottom panel (501b) of the original three-dimensional lattice sandwich panel to be welded. The core plate (504) is composed of the same lattice cell structure (505). An I-beam (506) is set between the original three-dimensional lattice sandwich panel (501) and the horizontal extension plate (503) to be spliced ​​and welded.

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