Auxiliary connecting device and equipment for metal and carbon fiber thermoplastic composite material special-shaped joint

Abstract

The utility model discloses an auxiliary connecting device and equipment for a metal and carbon fiber thermoplastic composite material special-shaped joint, and the auxiliary connecting device for the metal and carbon fiber thermoplastic composite material special-shaped joint comprises an upper fixed table and a lower fixed table, the upper fixing table comprises an upper bearing table, an upper loading table, an upper fixing table first welding cavity, an upper fixing table second welding cavity, an upper protective gas conveying pipeline, an upper negative pressure pipeline and an upper adsorption head. The lower fixing table comprises a lower bearing table, a lower loading table, a lower fixing table first welding cavity, a lower protective gas conveying pipeline, a lower negative pressure pipeline and a lower adsorption head. The equipment comprises the auxiliary connecting device for the metal and carbon fiber thermoplastic composite material special-shaped joint. The auxiliary connecting device and equipment for the metal and carbon fiber thermoplastic composite material special-shaped joint have the advantages of being simple in structure, convenient to assemble, stable and reliable in performance, easy to implement, high in connecting joint performance consistency and the like which are not achieved in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of joining metal materials and carbon fiber thermoplastic composite materials, and in particular to an auxiliary connection device and equipment for irregular joints of metal and carbon fiber thermoplastic composite materials. Background Technology

[0002] Material joining is a crucial processing technology in modern industry, serving as a vital means of combining dissimilar components. Common joining methods include welding, riveting, and adhesive bonding; however, achieving high-performance connections between components remains an important research direction. This is especially true for joining dissimilar materials, where significant differences in physical and chemical properties make conventional joining methods insufficient for ensuring long-term structural stability.

[0003] Carbon fiber thermoplastic composites originated in the 1970s, but their application and promotion have only begun in the last 30 years. As a high-performance composite material, it weighs only 20% of steel under the same strength conditions. Its high specific strength and environmental resistance make it a highly desirable lightweight material, widely used in aerospace, automotive, and construction fields. Although carbon fiber thermoplastic composites have many advantages, the reinforcing characteristics of its long fibers and the low radial impact toughness of carbon fibers mean that local structural damage has a significant impact on overall performance. Therefore, conventional riveting methods can significantly affect the fatigue performance of carbon fiber thermoplastic composites. While adhesive bonding does not damage the fiber structure of carbon fiber thermoplastic composites, the degradation effect of the colloidal material can affect the strength and long-term stability of the joint interface. In contrast, welding is a relatively efficient joining method, and the joint strength is relatively ideal. Currently, interfacial bonding between metals and carbon fiber thermoplastic composites can be achieved using friction stirring, argon arc welding, and lasers. In particular, the miniaturization of laser equipment, its precise energy output, and its ability to assist in precise motion control make it more promising in the field of special joining.

[0004] Due to the significant differences in composition and microstructure between metals and carbon fiber thermoplastic composites, it is difficult to achieve a connection between them using traditional welding methods. Currently, the common approach is to overlap the two materials, using laser heating to melt the surface polymer of the carbon fiber thermoplastic composite material near the metal, combined with external pressure, thereby forming a bond between the metal and the carbon fiber thermoplastic composite. However, this overlapping method of metal-carbon fiber thermoplastic composite bonding results in shear forces at the joint under stress, which can easily lead to interfacial delamination failure of the joint.

[0005] In summary, conventional methods for joining metal and carbon fiber thermoplastic composites make it difficult to achieve high-performance connections. Furthermore, the assembly and connection of these materials struggles to achieve high efficiency and precision, hindering the development and widespread application of this technology.

[0006] In view of this, the purpose of this utility model is to provide a new technical solution to solve the existing technical defects. Utility Model Content

[0007] In order to overcome the shortcomings of the prior art, this utility model provides an auxiliary connection device and equipment for irregular joints of metal and carbon fiber thermoplastic composite materials, which effectively solves the technical defects of the prior art such as poor controllability, low processing efficiency and low performance.

[0008] The technical solution adopted by this utility model to solve its technical problem is:

[0009] An auxiliary connection device for a metal and carbon fiber thermoplastic composite irregular joint includes an upper fixing platform and a lower fixing platform, wherein,

[0010] The upper fixed platform includes an upper bearing platform and an upper loading platform. The upper bearing platform is provided with a first through groove and a second through groove that extend vertically through the upper bearing platform. The upper loading platform is provided with a first groove and a second groove. The first through groove and the first groove of the upper bearing platform cooperate with each other to form a first welding cavity of the upper fixed platform. The second through groove and the second groove of the upper loading platform cooperate with each other to form a second welding cavity of the upper fixed platform. The first welding cavity of the upper fixed platform is used to realize the welding connection between the metal connection reinforcement structure and the metal plate. The second welding cavity of the upper fixed platform is used to realize the first-side welding connection between the metal connection reinforcement structure and the carbon fiber thermoplastic composite material.

[0011] The lower fixing platform includes a lower bearing platform and a lower loading platform. The lower bearing platform is provided with a first through groove that runs vertically through the lower bearing platform, and the lower loading platform is provided with a first groove. The first through groove and the first groove cooperate with each other to form a first welding cavity of the lower fixing platform. The first welding cavity of the lower fixing platform is used to realize the second-side welding connection between the metal plate and the carbon fiber thermoplastic composite material.

[0012] The upper support platform and / or upper loading platform are provided with an upper protective gas delivery pipeline. The upper protective gas delivery pipeline is connected to an external protective gas delivery source and communicates with the first welding cavity and the second welding cavity of the upper fixed platform to deliver protective gas to the first welding cavity and the second welding cavity of the upper fixed platform.

[0013] The lower support platform and / or lower loading platform are provided with a lower protective gas delivery pipeline. The lower protective gas delivery pipeline is connected to an external protective gas delivery source and communicates with the first welding cavity of the lower fixed platform to deliver protective gas to the first welding cavity of the lower fixed platform.

[0014] The upper loading platform is provided with an upper negative pressure pipeline that is connected to an external negative pressure source, and the loading surface of the upper loading platform is provided with an upper suction head that is connected to the upper negative pressure pipeline.

[0015] The lower loading platform is equipped with a lower negative pressure pipeline that is connected to an external negative pressure source, and the loading surface of the lower loading platform is equipped with a lower suction head that is connected to the lower negative pressure pipeline.

[0016] As a further improvement to the above technical solution, the upper loading platform has a loading surface and the loading surface of the upper loading platform is an irregularly shaped surface adapted to the metal connection reinforcement structure, and the lower loading platform has a loading surface and the loading surface of the lower loading platform is an irregularly shaped surface adapted to the metal plate.

[0017] As a further improvement to the above technical solution, the loading surface of the upper loading stage has an upper positioning recess, which is used to position the metal connection reinforcement structure; the loading surface of the lower loading stage has a lower positioning recess, which is used to position the metal plate.

[0018] As a further improvement to the above technical solution, the upper protective gas delivery pipeline is arranged inside the upper support platform, and an upper gas connector is provided on the upper surface of the upper support platform. The upper gas connector is connected to the upper protective gas delivery pipeline and is used to connect to an external protective gas delivery source through a pipeline.

[0019] As a further improvement to the above technical solution, the lower protective gas delivery pipeline is installed inside the lower support platform, and a lower gas connector is provided on the upper surface of the lower support platform. The lower gas connector is connected to the lower protective gas delivery pipeline and is used to connect to an external protective gas delivery source through a pipeline.

[0020] As a further improvement to the above technical solution, the upper protective gas delivery pipeline includes an upper main pipeline and several upper branch pipelines connected to the upper main pipeline, and the upper branch pipelines are connected to the first welding cavity and the second welding cavity of the upper fixed platform.

[0021] As a further improvement to the above technical solution, the lower protective gas delivery pipeline includes a lower main pipeline and several lower branch pipelines connected to the lower main pipeline, and the lower branch pipelines are connected to the first welding cavity of the lower fixed platform.

[0022] As a further improvement to the above technical solution, the upper loading platform is provided with an upper negative pressure connector on its side. The upper negative pressure connector is connected to the upper negative pressure pipeline and is used to connect to an external negative pressure source through the pipeline. The upper suction head is an upper negative pressure suction head, which is a rubber suction head and has multiple parts.

[0023] As a further improvement to the above technical solution, a lower negative pressure connector is provided on the side of the lower loading platform. The lower negative pressure connector is connected to the lower negative pressure pipeline and is used to connect to an external negative pressure source through the pipeline. The lower suction head is a lower negative pressure suction head, which is a rubber suction head and has multiple parts.

[0024] As a further improvement to the above technical solution, the upper support platform and the upper loading platform are fixedly connected by upper fixing bolts, and the lower support platform and the lower loading platform are fixedly connected by lower fixing bolts.

[0025] As a further improvement to the above technical solution, an upper sealing gasket is provided between the upper bearing platform and the upper loading platform. The upper sealing gasket has a first through groove and a second through groove that are respectively adapted to the first welding cavity of the upper fixed platform and the second welding cavity of the upper fixed platform.

[0026] As a further improvement to the above technical solution, a lower sealing gasket is provided between the lower bearing platform and the lower loading platform, and a first through groove for the lower sealing gasket is provided on the lower sealing gasket to adapt to the first welding cavity of the lower fixed platform.

[0027] As a further improvement to the above technical solution, the first welding cavity of the upper fixed platform, the second welding cavity of the upper fixed platform, and the first welding cavity of the lower fixed platform form a protective gas storage cavity.

[0028] This utility model also provides:

[0029] A connection device for a metal and carbon fiber thermoplastic composite irregular joint includes a connection device for the metal and carbon fiber thermoplastic composite irregular joint, and also includes a robot and laser welding equipment.

[0030] As a further improvement to the above technical solution, the robotic arm includes an upper fixed platform robotic arm and a lower fixed platform robotic arm, wherein the upper fixed platform is fixedly mounted on the upper fixed platform robotic arm and the lower fixed platform is fixedly mounted on the lower fixed platform robotic arm.

[0031] As a further improvement to the above technical solution, the upper support platform is provided with an upper robot arm fixing end and is fixedly connected to the upper fixed platform robot arm through the upper robot arm fixing end; the lower support platform is provided with a lower robot arm fixing end and is fixedly connected to the lower fixed platform robot arm through the lower robot arm fixing end.

[0032] As a further improvement to the above technical solution, the laser welding equipment includes a first laser welding device, a second laser welding device, and a third laser welding device. The first laser welding device performs laser welding work in the first welding cavity of the upper fixed platform, the second laser welding device performs laser welding work in the second welding cavity of the upper fixed platform, and the third laser welding device performs laser welding work in the first welding cavity of the lower fixed platform.

[0033] The beneficial effects of this utility model are as follows: This utility model provides an auxiliary connection device and equipment for irregular joints of metal and carbon fiber thermoplastic composite materials. This auxiliary connection device and equipment uses an upper fixed platform and a lower fixed platform to fix the metal connection reinforcement structure and metal plate. Protective gas is introduced into the first welding cavity of the upper fixed platform, the second welding cavity of the upper fixed platform, and the first welding cavity of the lower fixed platform through upper and lower protective gas supply pipelines, forming a protective surface for the processed surface and reducing oxidation. The upper and lower adsorption heads further fix the metal connection reinforcement structure and metal plate, preventing positional movement and improving processing accuracy and stability. Furthermore, by applying pressure to the metal connection reinforcement structure and metal plate as a whole through the upper and lower fixed platforms, the pressure is more uniform, reducing shear effects under stress and greatly improving the mechanical properties of the joint.

[0034] In summary, the auxiliary connection device and equipment for this type of metal and carbon fiber thermoplastic composite irregular joint effectively solves the technical defects of the existing technology, such as poor controllability, low processing efficiency, and low performance. Attached Figure Description

[0035] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0036] Figure 1 This is an assembly diagram of the auxiliary connection device for the metal and carbon fiber thermoplastic composite irregular joint in this utility model;

[0037] Figure 2 This is another assembly diagram of the auxiliary connection device for the metal and carbon fiber thermoplastic composite irregular joint in this utility model;

[0038] Figure 3 This is a schematic diagram showing the distribution of the upper protective gas delivery pipeline within the upper support platform of this utility model;

[0039] Figure 4 This is a cross-sectional schematic diagram of the upper support platform in this utility model;

[0040] Figure 5 This is a schematic diagram showing the distribution of the lower protective gas delivery pipeline within the lower support platform of this utility model;

[0041] Figure 6 This is a cross-sectional schematic diagram of the lower support platform in this utility model;

[0042] Figure 7 This is a top view of the upper loading platform in this utility model;

[0043] Figure 8 This is a bottom view of the upper loading platform in this utility model;

[0044] Figure 9 This is a schematic diagram of the distribution of the upper negative pressure pipeline inside the upper loading platform in this utility model;

[0045] Figure 10 This is a bottom view of the lower loading platform in this utility model;

[0046] Figure 11 This is a top view of the lower loading platform in this utility model;

[0047] Figure 12 This is a schematic diagram of the distribution of the lower negative pressure pipeline inside the lower loading platform in this utility model;

[0048] Figure 13 This is a schematic diagram of the upper sealing gasket in this utility model;

[0049] Figure 14 This is a schematic diagram of the structure of the lower sealing gasket in this usage configuration. Detailed Implementation

[0050] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other, as described above. Figure 1-14 .

[0051] Specific reference Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 7 , Figure 9 , Figure 10 , Figure 12 This utility model provides:

[0052] An auxiliary connection device for a metal and carbon fiber thermoplastic composite irregular joint includes an upper fixing platform and a lower fixing platform, wherein,

[0053] Reference Figure 1 , Figure 2 , Figure 3 , Figure 7 , Figure 9 The upper fixing platform includes an upper bearing platform 11 and an upper loading platform 12. The upper bearing platform 11 is provided with a first through groove 111 and a second through groove 112 that extend vertically through the upper bearing platform. The upper loading platform 12 is provided with a first groove 121 and a second groove 122. The first through groove 111 and the first groove 121 of the upper bearing platform cooperate with each other to form a first welding cavity 13 of the upper fixing platform. The second through groove 112 and the second groove 122 of the upper loading platform cooperate with each other to form a second welding cavity 14 of the upper fixing platform. The first welding cavity 13 of the upper fixing platform is used to realize the welding connection between the metal connection reinforcement structure 91 and the metal plate 92. The second welding cavity 14 of the upper fixed platform is used to realize the first-side welding connection between the metal connection reinforcement structure 91 and the carbon fiber thermoplastic composite material 93; the upper bearing platform 11 and / or the upper loading platform 12 are provided with an upper protective gas delivery pipeline 15, which is connected to an external protective gas delivery source and communicates with the first welding cavity 13 and the second welding cavity 14 of the upper fixed platform to deliver protective gas to the first welding cavity 13 and the second welding cavity 14 of the upper fixed platform; the upper loading platform 12 is provided with an upper negative pressure pipeline 16 that communicates with an external negative pressure source, and the loading surface of the upper loading platform 12 is provided with an upper adsorption head 17 that communicates with the upper negative pressure pipeline 16.

[0054] Reference Figure 1 , Figure 2 , Figure 5 , Figure 10 , Figure 12The lower fixing platform includes a lower bearing platform 21 and a lower loading platform 22. The lower bearing platform 21 is provided with a first through groove 211 that runs vertically through the lower bearing platform. The lower loading platform 22 is provided with a first groove 221 that runs vertically through the lower bearing platform. The first through groove 211 and the first groove 221 cooperate with each other to form a first welding cavity 23 of the lower fixing platform. The first welding cavity 23 of the lower fixing platform is used to realize the second-side welding connection between the metal plate 92 and the carbon fiber thermoplastic composite material 93. The lower bearing platform 21 and / or the lower loading platform 22 are provided with a lower protective gas delivery pipeline 25. The lower protective gas delivery pipeline 25 is connected to an external protective gas delivery source and communicates with the first welding cavity 23 of the lower fixing platform to deliver protective gas to the first welding cavity 23 of the lower fixing platform. The lower loading platform 22 is provided with a lower negative pressure pipeline 26 that communicates with an external negative pressure source. The loading surface of the lower loading platform 22 is provided with a lower adsorption head 27 that communicates with the lower negative pressure pipeline 26.

[0055] In application, the metal connection reinforcement structure 91 and the metal plate 92 are positioned by the upper and lower fixed platforms, respectively, and then fixed to the carbon fiber thermoplastic composite material 93. Protective gas is supplied to the first welding chamber 13 and the second welding chamber 14 of the upper fixed platform via the upper protective gas supply pipe 15, and to the second welding chamber 23 of the lower fixed platform via the lower protective gas supply pipe 25. This allows the supplied protective gas to form a protective gas layer on the processed surface during welding operations in the first welding chamber 13, the second welding chamber 14, and the first welding chamber 23 of the lower fixed platform, protecting the surface, reducing oxidation, and improving welding quality. Furthermore, the upper negative pressure pipe 16 and the upper adsorption head 17 enable the adsorption and transport of the metal connection reinforcement structure 91, and the lower negative pressure pipe 26 and the lower adsorption head 27 enable the adsorption and transport of the metal plate 92, improving processing efficiency and making operation more convenient. In addition, by applying pressure to the metal connection reinforcement structure and metal plate as a whole by applying pressure to the upper and lower fixed platforms, the pressure is more uniform, which can reduce the shearing effect under stress and greatly improve the mechanical properties of the connection joint.

[0056] Reference Figure 1 , Figure 2 In one embodiment, the upper loading stage 12 has a loading surface, and the loading surface of the upper loading stage 12 is an irregularly shaped surface adapted to the metal connection reinforcement structure 91. The lower loading stage 22 has a loading surface, and the loading surface of the lower loading stage 22 is an irregularly shaped surface adapted to the metal plate 92. The aforementioned loading surface is the surface on which the upper loading stage 12 or the lower loading stage 22 applies pressure to the metal connection reinforcement structure 91 and the metal plate 92. The upper adsorption head 17 and the lower adsorption head 27 are disposed on the corresponding loading surfaces.

[0057] In this embodiment, the loading surface of the upper loading stage 12 has an upper positioning recess, which is a multi-step groove. The upper positioning recess is used to position the metal connection reinforcement structure 91, and the multi-step groove is adapted to the contour of the metal connection reinforcement structure 91. The loading surface of the lower loading stage 22 has a lower positioning recess, which is a stepped groove. The lower positioning recess is used to position the metal plate 92, and the multi-step groove is adapted to the contour of the metal plate 92.

[0058] Reference Figure 8 , Figure 9 In some embodiments, the upper protective gas delivery pipeline 15 is disposed inside the upper support platform 11, and the upper surface of the upper support platform 11 is provided with an upper gas connector 151. The upper gas connector 151 is connected to the upper protective gas delivery pipeline 15 and is used to connect to an external protective gas delivery source through a pipeline. In this embodiment, the upper protective gas delivery pipeline 15 includes an upper main pipeline and several upper branch pipelines connected to the upper main pipeline. The upper branch pipelines are connected to the first welding cavity 13 and the second welding cavity 14 of the upper fixed platform. Through multiple upper branch pipelines, the protective gas can be filled into the first welding cavity 13 and the second welding cavity 14 of the upper fixed platform more quickly and evenly, thereby obtaining a better protective effect.

[0059] Reference Figure 11 , Figure 12 In some embodiments, the lower protective gas delivery pipeline 25 is disposed inside the lower support platform 21. A lower gas connector 251 is provided on the upper surface of the lower support platform 21. The lower gas connector 251 communicates with the lower protective gas delivery pipeline 25 and is used to connect to an external protective gas delivery source via a pipeline. In this embodiment, the lower protective gas delivery pipeline 25 includes a lower main pipeline and several lower branch pipelines communicating with the lower main pipeline. The lower branch pipelines communicate with the first welding cavity 23 of the lower fixed platform. Through multiple lower branch pipelines, the protective gas can be filled into the first welding cavity 23 of the lower fixed platform more quickly and evenly, achieving a better protective effect.

[0060] With the above structure, the first welding cavity 13 of the upper fixed stage, the second welding cavity 14 of the upper fixed stage, and the first welding cavity 23 of the lower fixed stage form a protective gas storage cavity. This provides surface protection, reduces oxidation, and improves processing quality.

[0061] Reference Figure 1 , Figure 2In some embodiments, the upper loading platform 12 is provided with an upper negative pressure connector 161 on its side. The upper negative pressure connector 161 is connected to the upper negative pressure pipeline 16 and is used to connect to an external negative pressure source through a pipeline. The upper suction head 17 is an upper negative pressure suction head, which is a rubber suction head and there are multiple upper negative pressure suction heads. The upper negative pressure pipeline 16, the upper suction head 17, the upper negative pressure connector 161, and the external negative pressure source together form an upper vacuum adsorption system. The lower loading platform 22 is provided with a lower negative pressure connector 261 on its side. The lower negative pressure connector 261 is connected to the lower negative pressure pipeline 26 and is used to connect to an external negative pressure source through a pipeline. The lower suction head 27 is a lower negative pressure suction head, which is a rubber suction head and there are multiple lower negative pressure suction heads. The lower negative pressure pipeline 26, the lower suction head 27, the lower negative pressure connector 261, and the external negative pressure source together form a lower vacuum adsorption system. The upper and lower vacuum adsorption systems can fix and adsorb the metal connection reinforcement structure 91 and the metal plate 92, thereby improving the processing quality and processing efficiency.

[0062] Reference Figure 1 , Figure 2 In some embodiments, the upper support platform 11 and the upper loading platform 12 are fixedly connected by an upper fixing bolt 18, which fixes the upper support platform 11 and the upper loading platform 12 to form the upper fixed platform; the lower support platform 21 and the lower loading platform 22 are fixedly connected by a lower fixing bolt 28, which fixes the lower support platform 21 and the lower loading platform 22 to form the lower fixed platform.

[0063] Reference Figure 1 , Figure 2 , Figure 13 and Figure 14 In some embodiments, an upper sealing gasket 31 is provided between the upper support platform 11 and the upper loading platform 21. The upper sealing gasket 31 has a first through groove 311 and a second through groove 312 respectively adapted to the first welding cavity 13 and the second welding cavity 14 of the upper fixed platform. The upper sealing gasket 31 can seal the gap between the upper support platform 11 and the upper loading platform 21. A lower sealing gasket 32 ​​is provided between the lower support platform 21 and the lower loading platform 22. The lower sealing gasket 32 ​​has a first through groove 321 adapted to the first welding cavity 23 of the lower fixed platform. The lower sealing gasket 32 ​​can seal the gap between the lower support platform 21 and the lower loading platform 22. The upper sealing gasket 31 and the lower sealing gasket 32 ​​can prevent the leakage of protective gas.

[0064] Based on the above-mentioned auxiliary connection device for irregular joints of metal and carbon fiber thermoplastic composite materials, this utility model also provides:

[0065] A connection device for a metal and carbon fiber thermoplastic composite irregular joint includes an auxiliary connection device for the metal and carbon fiber thermoplastic composite irregular joint, and also includes a robot and laser welding equipment.

[0066] The robotic arm includes an upper fixed-stage robotic arm and a lower fixed-stage robotic arm. The upper fixed stage is fixedly mounted on the upper fixed-stage robotic arm, and the lower fixed stage is fixedly mounted on the lower fixed-stage robotic arm. An upper robotic arm fixing end 19 is provided on the upper support platform 11 and is fixedly connected to the upper fixed-stage robotic arm via the upper robotic arm fixing end 19. A lower robotic arm fixing end 29 is provided on the lower support platform 21 and is fixedly connected to the lower fixed-stage robotic arm via the lower robotic arm fixing end 29. The laser welding equipment includes a first laser welding device, a second laser welding device, and a third laser welding device. The first laser welding device performs laser welding within the first welding cavity 13 of the upper fixed stage, the second laser welding device performs laser welding within the second welding cavity 14 of the upper fixed stage, and the third laser welding device performs laser welding within the first welding cavity 23 of the lower fixed stage.

[0067] In application, the connection device for this type of metal and carbon fiber thermoplastic composite irregular joint utilizes an upper fixed stage. With the assistance of an upper fixed stage robot, the upper fixed stage automatically adsorbs and positions the metal connection reinforcement structure 91 to be welded before welding. Shielding gas is introduced into the first welding chamber 13 and the second welding chamber 14 of the upper fixed stage to form a protective surface and reduce oxidation. The lower fixed stage, also with the assistance of a lower fixed stage robot, adsorbs and fixes the metal plate 92 to be welded, pre-positioning it on the welding support frame. Shielding gas is introduced into the first welding chamber 23 of the lower fixed stage to form a protective surface and reduce oxidation. With the assistance of the upper and lower fixed stage robots, the upper and lower fixed stages can quickly move to predetermined positions, defining the position of the carbon fiber thermoplastic composite material 93. After placement, a preset pressure is applied. Then, the fiber laser carried by the robot performs welding with preset parameters in the first welding chamber 13 and the second welding chamber 14 of the upper fixed stage, respectively. After welding, the vacuum adsorption system is unloaded, and the welded metal plate and carbon fiber thermoplastic composite irregular joint are placed on the welding support frame and removed by the robotic arm. This device can fully utilize the automation of the robotic arm to carry out efficient and rapid processing while ensuring welding quality. Moreover, the irregular metal and carbon fiber thermoplastic composite joint can take full advantage of the double-sided nature of the carbon fiber thermoplastic composite to construct the connection interface, reducing the shear effect under stress and greatly improving the mechanical properties of the joint.

[0068] Implementation 1:

[0069] Laser joining of irregularly shaped structures is performed on pure aluminum sheets and carbon fiber reinforced resin composite materials. The thickness of the pure aluminum sheet is 2.0 mm, the thickness of the carbon fiber reinforced resin composite material is 2.5 mm, the thickness of the irregularly shaped pure aluminum component is 2.0 mm, and the bending height is 2.5 mm. First, a robotic arm controls the upper fixed stage to move to the placement area of ​​the irregularly shaped pure aluminum component, approaches it, and fixes it using vacuum adsorption. Simultaneously, argon gas is introduced through the protective gas input system of the upper fixed stage, filling the cavities of the metal laser welding area and the metal / carbon fiber thermoplastic composite welding area with argon gas. Then, a robotic arm controls the lower fixed stage to move to the placement area of ​​the pure aluminum sheet, approaches it, fixes it using vacuum adsorption, and then moves it to the designated position on the welding support frame. Nitrogen gas is introduced through the protective gas input system, filling the welding cavity with nitrogen. At the same time, the robotic arm-controlled upper fixed stage carries the irregularly shaped pure aluminum component to a designated position on the upper part of the pure aluminum sheet. At this point, a carbon fiber thermoplastic composite plate is fed in and positioned using irregularly shaped pure aluminum components, achieving automatic pre-welding assembly of the aluminum plate, carbon fiber thermoplastic composite plate, and irregularly shaped pure aluminum components. Then, a robotic arm carrying a fiber laser moves sequentially to the metal welding area and the upper and lower metal / carbon fiber thermoplastic composite welding areas, performing laser welding with predetermined process parameters. After welding is completed, the vacuum adsorption systems of the upper and lower fixed stages are unloaded, leaving the welded irregularly shaped structure of pure aluminum and carbon fiber reinforced resin composite material on the welding support frame, which can then be removed by other robotic arms.

[0070] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. An auxiliary connection device for a non-standard joint made of metal and carbon fiber thermoplastic composite material, characterized in that: Includes an upper fixed platform and a lower fixed platform, wherein, The upper fixed platform includes an upper bearing platform (11) and an upper loading platform (12). The upper bearing platform (11) is provided with a first through groove (111) and a second through groove (112) that are vertically connected. The upper loading platform (12) is provided with a first groove (121) and a second groove (122). The first through groove (111) and the first groove (121) cooperate with each other to form a first welding cavity (13) of the upper fixed platform. The second through groove (112) and the second groove (122) cooperate with each other to form a second welding cavity (14) of the upper fixed platform. The first welding cavity (13) of the upper fixed platform is used to realize the welding connection between the metal connection reinforcement structure (91) and the metal plate (92). The second welding cavity (14) of the upper fixed platform is used to realize the first surface welding connection between the metal connection reinforcement structure (91) and the carbon fiber thermoplastic composite material (93). The lower fixing platform includes a lower bearing platform (21) and a lower loading platform (22). The lower bearing platform (21) is provided with a first through groove (211) that runs vertically through the lower bearing platform. The lower loading platform (22) is provided with a first groove (221) that runs vertically through the lower bearing platform. The first through groove (211) and the first groove (221) of the lower loading platform cooperate with each other to form a first welding cavity (23) of the lower fixing platform. The first welding cavity (23) of the lower fixing platform is used to realize the second-side welding connection between the metal plate (92) and the carbon fiber thermoplastic composite material (93). The upper support platform (11) and / or the upper loading platform (12) are provided with an upper protective gas delivery pipeline (15). The upper protective gas delivery pipeline (15) is connected to an external protective gas delivery source and communicates with the first welding cavity (13) and the second welding cavity (14) of the upper fixed platform to deliver protective gas to the first welding cavity (13) and the second welding cavity (14) of the upper fixed platform. The lower support platform (21) and / or the lower loading platform (22) are provided with a lower protective gas delivery pipeline (25). The lower protective gas delivery pipeline (25) is connected to an external protective gas delivery source and communicates with the first welding cavity (23) of the lower fixed platform to deliver protective gas to the first welding cavity (23) of the lower fixed platform. The upper loading platform (12) is provided with an upper negative pressure pipeline (16) that is connected to an external negative pressure source, and the loading surface of the upper loading platform (12) is provided with an upper suction head (17) that is connected to the upper negative pressure pipeline (16). The lower loading platform (22) is provided with a lower negative pressure pipeline (26) that is connected to an external negative pressure source, and the loading surface of the lower loading platform (22) is provided with a lower suction head (27) that is connected to the lower negative pressure pipeline (26).

2. The auxiliary connection device for a metal and carbon fiber thermoplastic composite irregular joint according to claim 1, characterized in that: The upper loading platform (12) has a loading surface and the loading surface of the upper loading platform (12) is a shaped surface adapted to the metal connection reinforcement structure (91). The lower loading platform (22) has a loading surface and the loading surface of the lower loading platform (22) is a shaped surface adapted to the metal plate (92). The upper loading platform (12) has an upper positioning recess on its loading surface, which is used to position the metal connection reinforcement structure (91). The lower loading platform (22) has a lower positioning recess on its loading surface, which is used to position the metal plate (92).

3. The auxiliary connection device for a metal and carbon fiber thermoplastic composite irregular joint according to claim 1, characterized in that: The upper protective gas delivery pipeline (15) is located inside the upper support platform (11). The upper surface of the upper support platform (11) is provided with an upper gas connector (151). The upper gas connector (151) is connected to the upper protective gas delivery pipeline (15) and is used to connect to an external protective gas delivery source through a pipeline. The lower protective gas delivery pipeline (25) is located inside the lower support platform (21). The upper surface of the lower support platform (21) is provided with a lower gas connector (251). The lower gas connector (251) is connected to the lower protective gas delivery pipeline (25) and is used to connect to an external protective gas delivery source through a pipeline.

4. The auxiliary connection device for a metal and carbon fiber thermoplastic composite irregular joint according to claim 1, characterized in that: The upper protective gas delivery pipeline (15) includes an upper main pipeline and several upper branch pipelines connected to the upper main pipeline. The upper branch pipelines are connected to the first welding cavity (13) and the second welding cavity (14) of the upper fixed platform. The lower protective gas delivery pipeline (25) includes a lower main pipeline and several lower branch pipelines connected to the lower main pipeline. The lower branch pipelines are connected to the first welding cavity (23) of the lower fixed platform.

5. The auxiliary connection device for a metal and carbon fiber thermoplastic composite irregular joint according to claim 1, characterized in that: The upper loading platform (12) is provided with an upper negative pressure connector (161) on its side. The upper negative pressure connector (161) is connected to the upper negative pressure pipeline (16) and is used to connect to an external negative pressure source through the pipeline. The upper suction head (17) is an upper negative pressure suction head. The upper negative pressure suction head is a rubber suction head and has multiple parts. The lower loading platform (22) is provided with a lower negative pressure connector (261) on its side. The lower negative pressure connector (261) is connected to the lower negative pressure pipeline (26) and is used to connect to an external negative pressure source through the pipeline. The lower suction head (27) is a lower negative pressure suction head. The lower negative pressure suction head is a rubber suction head and has multiple parts.

6. The auxiliary connection device for a metal and carbon fiber thermoplastic composite irregular joint according to claim 1, characterized in that: The upper support platform (11) and the upper loading platform (12) are fixedly connected by upper fixing bolts (18), and the lower support platform (21) and the lower loading platform (22) are fixedly connected by lower fixing bolts (28). An upper sealing gasket (31) is provided between the upper bearing platform (11) and the upper loading platform (12). The upper sealing gasket (31) has a first through groove (311) and a second through groove (312) that are respectively adapted to the first welding cavity (13) and the second welding cavity (14) of the upper fixed platform. A lower sealing gasket (32) is provided between the lower support platform (21) and the lower loading platform (22), and a lower sealing gasket first through groove (321) adapted to the first welding cavity (23) of the lower fixing platform is provided on the lower sealing gasket (32).

7. An auxiliary connection device for a metal and carbon fiber thermoplastic composite irregular joint according to any one of claims 1-6, characterized in that: The upper fixed platform first welding cavity (13), the upper fixed platform second welding cavity (14), and the lower fixed platform first welding cavity (23) form a protective gas storage cavity.

8. An auxiliary connection device for a non-standard joint made of metal and carbon fiber thermoplastic composite material, characterized in that: The device includes the connection device for the metal and carbon fiber thermoplastic composite irregular joint as described in any one of claims 1-7, and also includes a robot and laser welding equipment.

9. The auxiliary connection device for a metal and carbon fiber thermoplastic composite irregular joint according to claim 8, characterized in that: The robotic arm includes an upper fixed platform robotic arm and a lower fixed platform robotic arm, with the upper fixed platform fixedly mounted on the upper fixed platform robotic arm and the lower fixed platform fixedly mounted on the lower fixed platform robotic arm; The upper support platform (11) is provided with an upper robot arm fixed end (19) and is fixedly connected to the upper fixed platform robot arm through the upper robot arm fixed end (19); the lower support platform (21) is provided with a lower robot arm fixed end (29) and is fixedly connected to the lower fixed platform robot arm through the lower robot arm fixed end (29).

10. The auxiliary connection device for a metal and carbon fiber thermoplastic composite irregular joint according to claim 8, characterized in that: The laser welding equipment includes a first laser welding device, a second laser welding device and a third laser welding device. The first laser welding device is located in the first welding cavity (13) of the upper fixed platform to perform laser welding work. The second laser welding device is located in the second welding cavity (14) of the upper fixed platform to perform laser welding work. The third laser welding device is located in the first welding cavity (23) of the lower fixed platform to perform laser welding work.

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