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

Abstract

The invention discloses an auxiliary connecting device and equipment for a metal and carbon fiber thermoplastic composite material special-shaped connector, and the auxiliary connecting device for the metal and carbon fiber thermoplastic composite material special-shaped connector comprises an upper fixing table and a lower fixing 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] The invention relates to the field of connection between metal materials and carbon fiber thermoplastic composite materials, in particular to an auxiliary connection device and equipment for special-shaped joints of metal and carbon fiber thermoplastic composite materials. Background Art

[0002] Material connection is an important processing technology in modern industry, and it is an important means to achieve the combination of dissimilar components. Common connection methods include welding, riveting, gluing, etc., but how to achieve high-performance connection between components is still an important research direction. Especially for the connection of dissimilar materials, the huge differences in physical and chemical properties make it difficult for conventional connection methods to achieve long-term stability of the structure.

[0003] Carbon fiber thermoplastic composites were born in the 1970s, but they have only been applied and promoted in the past 30 years. As a high-performance composite material, its weight is only 20% of steel under the same strength conditions. Its high specific strength and environmental tolerance make it the most desirable lightweight material, and it is widely used in aerospace, automobile transportation, construction and other fields. Although carbon fiber thermoplastic composites have many advantages, the reinforcement characteristics of its long fibers and the low radial impact toughness of carbon fibers lead to a very obvious impact of local structural damage on the overall performance. Therefore, the damage of conventional riveting methods to carbon fiber thermoplastic composites will significantly affect the fatigue performance of the structure. Although adhesive connection will not damage the fiber structure of carbon fiber thermoplastic composites, the degradation effect of colloidal materials will affect the strength and long-term stability of the connection interface. Relatively speaking, welding is a relatively efficient connection method, and the strength of the connection joint is relatively ideal. At present, the interface connection of metal and carbon fiber thermoplastic composites can be achieved by means of friction stirring, argon arc, laser and other means. In particular, the miniaturization of laser equipment, its precise energy output, and auxiliary precision motion control make it more promising in the field of special connections.

[0004] Due to the huge differences in composition and microstructure of metal and carbon fiber thermoplastic composite materials, it is difficult to connect the two through traditional welding methods. At present, the commonly used method is to overlap the two, using laser to heat the metal to melt the surface polymer material of the carbon fiber thermoplastic composite material close to the metal, combined with external pressure, to form a connection between the metal and the carbon fiber thermoplastic composite material. However, this overlapping method of metal and carbon fiber thermoplastic composite materials will cause shear force to form when the joint is subjected to force, which can easily lead to interface peeling failure of the connection joint.

[0005] In summary, it is difficult to achieve high-performance connection between metal and carbon fiber thermoplastic composite materials by conventional means. Moreover, it is difficult to achieve high efficiency and high precision in the connection and assembly of materials. These defects have led to the development and promotion of this technology.

[0006] In view of this, the purpose of the present invention is to provide a new technical solution to solve the existing technical defects. Summary of the invention

[0007] In order to overcome the shortcomings of the prior art, the present invention provides an auxiliary connection device and equipment for special-shaped 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 the present invention to solve its technical problem is:

[0009] An auxiliary connection device for special-shaped joints of metal and carbon fiber thermoplastic composite materials, comprising an upper fixing platform and a lower fixing platform, wherein:

[0010] The upper fixing platform comprises an upper bearing platform and an upper loading platform, wherein the upper bearing platform is provided with a first upper bearing platform through groove and a second upper bearing platform through groove which are passed through from top to bottom, and the upper loading platform is provided with a first upper loading platform groove and a second upper loading platform groove, wherein the first upper bearing platform through groove and the first upper loading platform groove cooperate with each other and jointly form a first welding cavity of the upper fixing platform, and the second upper bearing platform through groove and the second upper loading platform groove cooperate with each other and jointly form a second welding cavity of the upper fixing platform, wherein the first welding cavity of the upper fixing platform is used to realize the welding connection between the metal connection reinforcement structure and the metal plate, and the second welding cavity of the upper fixing platform is used to realize the welding connection between the metal connection reinforcement structure and the first surface of the carbon fiber thermoplastic composite material;

[0011] The lower fixing platform comprises a lower bearing platform and a lower loading platform, the lower bearing platform is provided with a first through groove of the lower bearing platform which passes through from top to bottom, the lower loading platform is provided with a first groove of the lower loading platform, the first through groove of the lower bearing platform and the first groove of the lower loading platform cooperate with each other and jointly form a first welding cavity of the lower fixing platform, the first welding cavity of the lower fixing platform is used to realize the welding connection between the metal plate and the second surface of the carbon fiber thermoplastic composite material;

[0012] An upper protective gas delivery pipeline is arranged inside the upper bearing platform and / or the upper loading platform, and the upper protective gas delivery pipeline is connected to an external protective gas delivery source and communicated with the first welding cavity of the upper fixed platform and the second welding cavity of the upper fixed platform to deliver the protective gas to the first welding cavity of the upper fixed platform and the second welding cavity of the upper fixed platform;

[0013] A lower protective gas delivery pipeline is arranged inside the lower bearing platform or / and the lower loading platform, and the lower protective gas delivery pipeline is connected to an external protective gas delivery source and communicated with the first welding cavity of the lower fixed platform to deliver the protective gas to the first welding cavity of the lower fixed platform;

[0014] An upper negative pressure pipeline connected to an external negative pressure source is provided inside the upper loading platform, and an upper adsorption head connected to the upper negative pressure pipeline is provided on the loading surface of the upper loading platform;

[0015] A lower negative pressure pipeline connected to an external negative pressure source is arranged inside the lower loading platform, and a lower adsorption head connected to the lower negative pressure pipeline is arranged on the loading surface of the lower loading platform.

[0016] As a further improvement of the above technical solution, the upper loading platform has a loading surface, and the loading surface of the upper loading platform is a special-shaped surface whose shape is 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 a special-shaped surface whose shape is adapted to the metal plate.

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

[0018] As a further improvement of the above technical solution, the upper protective gas delivery pipeline is arranged inside the upper bearing platform, and an upper gas connector is arranged on the upper surface of the upper bearing platform, and 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 of the above technical solution, the lower protective gas delivery pipeline is arranged inside the lower supporting platform, and a lower gas connector is arranged on the upper surface of the lower supporting 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 of the above technical solution, the upper protective gas delivery pipeline includes an upper main pipeline and a plurality of upper branch pipelines connected to the upper main pipeline, and the upper branch pipelines are connected to the first welding chamber of the upper fixed platform and the second welding chamber of the upper fixed platform;

[0021] As a further improvement of the above technical solution, the lower protective gas delivery pipeline includes a lower main pipeline and a plurality of 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 of the above technical solution, an upper negative pressure joint is provided on the side of the upper loading platform, the upper negative pressure joint is communicated with the upper negative pressure pipeline and is used to connect to an external negative pressure source through a pipeline, the upper adsorption head is an upper negative pressure suction head, and the upper negative pressure suction head is a rubber suction head and has multiple parts;

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

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

[0025] As a further improvement of the above technical solution, an upper sealing gasket is arranged between the upper bearing platform and the upper loading platform, and the upper sealing gasket is provided with an upper sealing gasket first through groove and an upper sealing gasket second through groove which are respectively adapted to the upper fixing platform first welding cavity and the upper fixing platform second welding cavity;

[0026] As a further improvement of the above technical solution, a lower sealing gasket is arranged between the lower bearing platform and the lower loading platform, and a lower sealing gasket first through groove adapted to the first welding cavity of the lower fixing platform is opened on the lower sealing gasket.

[0027] As a further improvement of 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] The present invention also provides:

[0029] A connection device for special-shaped joints of metal and carbon fiber thermoplastic composite materials comprises the connection device for special-shaped joints of metal and carbon fiber thermoplastic composite materials, and also comprises a manipulator and laser welding equipment.

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

[0031] As a further improvement of the above technical solution, an upper manipulator fixed end is provided on the upper supporting platform and is fixedly connected to the upper fixed platform manipulator through the upper manipulator fixed end; a lower manipulator fixed end is provided on the lower supporting platform and is fixedly connected to the lower fixed platform manipulator through the lower manipulator fixed end.

[0032] As a further improvement of the above technical solution, the laser welding equipment includes a first laser welding equipment, a second laser welding equipment and a third laser welding equipment, the first laser welding equipment is located in the first welding cavity of the upper fixed platform to perform laser welding work, the second laser welding equipment is located in the second welding cavity (14) of the upper fixed platform to perform laser welding work, and the third laser welding equipment is located in the first welding cavity of the lower fixed platform to perform laser welding work.

[0033] The beneficial effects of the present invention are as follows: the present invention provides an auxiliary connection device and equipment for special-shaped joints of metal and carbon fiber thermoplastic composite materials, wherein the auxiliary connection device and equipment for special-shaped joints of metal and carbon fiber thermoplastic composite materials fix the metal connection reinforcement structure and the metal plate through an upper fixed platform and a lower fixed platform, and input protective gas 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 an upper protective gas delivery pipeline and a lower protective gas delivery pipeline, so as to form processing surface protection and reduce oxidation; the metal connection reinforcement structure and the metal plate can be further fixed by an upper adsorption head and a lower adsorption head, so as to avoid the position movement of the metal connection reinforcement structure and the metal plate, and improve the processing accuracy and processing stability; in addition, by applying pressure to the metal connection reinforcement structure and the metal plate through the upper fixed platform and the lower fixed platform as a whole, the pressure is more uniform, the shear effect when subjected to force can be reduced, and the mechanical properties of the connection joint are greatly improved.

[0034] In summary, the auxiliary connection device and equipment of the metal and carbon fiber thermoplastic composite special-shaped joints effectively solve the technical defects of the prior art such as poor controllability, low processing efficiency and low performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0036] Figure 1 It is a schematic diagram of the assembly of the auxiliary connection device of the metal and carbon fiber thermoplastic composite material special-shaped joint in the present invention;

[0037] Figure 2 It is another assembly schematic diagram of the auxiliary connection device of the metal and carbon fiber thermoplastic composite material special-shaped joint in the present invention;

[0038] Figure 3 It is a distribution diagram of the upper protective gas delivery pipeline in the upper bearing platform of the present invention;

[0039] Figure 4 is a cross-sectional schematic diagram of the upper bearing platform in the present invention;

[0040] Figure 5 It is a distribution diagram of the lower protective gas delivery pipeline in the lower bearing platform of the present invention;

[0041] Figure 6 is a cross-sectional schematic diagram of the lower bearing platform in the present invention;

[0042] Figure 7 is a top view of the upper loading platform in the present invention;

[0043] Figure 8 is a bottom view of the upper loading platform in the present invention;

[0044] Fig. 9 It is a schematic diagram of the distribution of the upper negative pressure pipeline inside the upper loading platform in the present invention;

[0045] Fig.10 is a bottom view of the lower loading platform in the present invention;

[0046] Fig.11 is a top view of the lower loading platform in the present invention;

[0047] Fig.12 It is a schematic diagram of the distribution of the lower negative pressure pipeline inside the lower loading platform in the present invention;

[0048] Fig.13 It is a schematic structural diagram of the upper sealing gasket in the present invention;

[0049] Fig.14 It is a schematic diagram of the structure of the lower sealing gasket in this use form. DETAILED DESCRIPTION

[0050] The following will clearly and completely describe the concept, specific structure and technical effects of the present invention in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the present invention. In addition, all the connection / connection relationships involved in the patent do not simply refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the invention can be combined interchangeably without conflicting with each other, refer to Figure 1-14 .

[0051] Specific reference Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 7 , Fig. 9 , Fig.10 , Fig.12 , the present invention provides:

[0052] An auxiliary connection device for special-shaped joints of metal and carbon fiber thermoplastic composite materials, comprising an upper fixing platform and a lower fixing platform, wherein:

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

[0054] Reference Figure 1 , Figure 2 , Figure 5 , Fig.10 , Fig.12 The lower fixed platform includes a lower bearing platform 21 and a lower loading platform 22, the lower bearing platform 21 is provided with a first lower bearing platform through groove 211 which passes through from top to bottom, the lower loading platform 22 is provided with a first lower loading platform groove 221, the first lower bearing platform through groove 211 and the first lower loading platform groove 221 cooperate with each other and jointly form a first lower fixed platform welding cavity 23, the first lower fixed platform welding cavity 23 is used to realize the welding connection between the metal plate 92 and the second surface of 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 communicated with the first welding cavity 23 of the lower fixed platform to deliver the protective gas to the first welding cavity 23 of the lower fixed platform; the lower loading platform 22 is provided with a lower negative pressure pipeline 26 which is communicated with an external negative pressure source, and the loading surface of the lower loading platform 22 is provided with a lower adsorption head 27 which is communicated with the lower negative pressure pipeline 26.

[0055] When used, the metal connection reinforcement structure 91 and the metal plate 92 are positioned respectively by the upper fixed platform and the lower fixed platform, and the metal connection reinforcement structure 91 and the metal plate 92 are fixed with the carbon fiber thermoplastic composite material 93. The upper protective gas delivery pipeline 15 is used to input the protective gas to the first welding chamber 13 of the upper fixed platform and the second welding chamber 14 of the upper fixed platform, and the lower protective gas delivery pipeline 25 is used to input the protective gas to the second welding chamber 23 of the lower fixed platform. In this way, when welding is performed in the first welding chamber 13 of the upper fixed platform, the second welding chamber 14 of the upper fixed platform and the first welding chamber 23 of the lower fixed platform, the input protective gas can be used to form gas protection, protect the processing surface, reduce oxidation, and improve welding quality. In addition, the upper negative pressure pipeline 16 and the upper adsorption head 17 can realize the adsorption and delivery of the metal connection reinforcement structure 91, and the lower negative pressure pipeline 26 and the lower adsorption head 27 can realize the adsorption and delivery of the metal plate 92, which can improve the processing efficiency and make the operation more convenient. In addition, by applying pressure to the metal connection reinforcement structure and the metal plate through the upper fixing platform and the lower fixing platform as a whole, the pressure is more uniform, the shear effect when subjected to force can be reduced, and the mechanical properties of the connection joint are greatly improved.

[0056] Reference Figure 1 , Figure 2 In one embodiment, the upper loading platform 12 has a loading surface and the loading surface of the upper loading platform 12 is a profiled surface that is shaped to fit the metal connection strengthening structure 91, and the lower loading platform 22 has a loading surface and the loading surface of the lower loading platform 22 is a profiled surface that is shaped to fit the metal plate 92. The above-mentioned loading surface is the surface on which the upper loading platform 12 or the lower loading platform 22 applies pressure to the metal connection strengthening structure 91 and the metal plate 92. The upper adsorption head 17 and the lower adsorption head 27 are arranged on the corresponding loading surfaces.

[0057] In this embodiment, the upper loading platform 12 has an upper positioning recess on its loading surface, and the upper positioning recess is a multi-step groove, and the upper positioning recess is used to position the metal connection strengthening structure 91, and the multi-step groove is adapted to the contour of the metal connection strengthening structure 91. The lower loading platform 22 has a lower positioning recess on its loading surface, and the lower positioning recess is a stepped groove, and 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 , Fig. 9In some embodiments, the upper protective gas delivery pipeline 15 is arranged inside the upper supporting platform 11, and an upper gas connector 151 is arranged on the upper surface of the upper supporting platform 11. 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 a plurality of upper branch pipelines connected to the upper main pipeline, and the upper branch pipelines are connected to the first welding cavity 13 of the upper fixed platform and the second welding cavity 15 of the upper fixed platform. Through multiple upper branch pipelines, the first welding cavity 13 of the upper fixed platform and the second welding cavity 14 of the upper fixed platform can be filled with protective gas more quickly and evenly to obtain better protection effect.

[0059] Reference Fig.11 , Fig.12 In some embodiments, the lower shielding gas delivery pipeline 25 is disposed inside the lower supporting platform 21, and a lower gas connector 251 is disposed on the upper surface of the lower supporting platform 21. The lower gas connector 251 is connected to the lower shielding gas delivery pipeline 25 and is used to connect to an external shielding gas delivery source through a pipeline. In this embodiment, the lower shielding gas delivery pipeline 25 includes a lower main pipeline and a plurality of lower branch pipelines connected to the lower main pipeline, and the lower branch pipelines are connected to the first welding cavity 23 of the lower fixed platform. The plurality of lower branch pipelines can fill the first welding cavity 23 of the lower fixed platform with shielding gas more quickly and evenly, thereby obtaining a better shielding effect.

[0060] Through the above structure, the upper fixing platform first welding chamber 13, the upper fixing platform second welding chamber 14 and the lower fixing platform first welding chamber 23 form a protective gas storage chamber, thereby protecting the machining surface, reducing oxidation and improving machining quality.

[0061] Reference Figure 1 , Figure 2In some embodiments, an upper negative pressure joint 161 is provided on the side of the upper loading platform 12, and the upper negative pressure joint 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, and the upper negative pressure suction head is a rubber suction head and has multiple parts; the upper negative pressure pipeline 16, the upper suction head 17, the upper negative pressure joint 161 and the external negative pressure source together form an upper vacuum adsorption system. A lower negative pressure joint 261 is provided on the side of the lower loading platform 22, and the lower negative pressure joint 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, and the lower negative pressure suction head is a rubber suction head and has multiple parts. The lower negative pressure pipeline 26, the lower suction head 27, the lower negative pressure joint 261 and the external negative pressure source together form a lower vacuum adsorption system. The upper vacuum adsorption system and the lower vacuum adsorption system 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 supporting platform 11 and the upper loading platform 12 are fixedly connected by upper fixing bolts 18, and the upper fixing bolts 18 fix the upper supporting platform 11 and the upper loading platform 12 to form the upper fixed platform; the lower supporting platform 21 and the lower loading platform 22 are fixedly connected by lower fixing bolts 28, and the lower fixing bolts 28 fix the lower supporting platform 21 and the lower loading platform 22 to form the lower fixed platform.

[0063] Reference Figure 1 , Figure 2 , Fig.13 and Fig.14 In some embodiments, an upper sealing gasket 31 is provided between the upper bearing platform 11 and the upper loading platform 12, and an upper sealing gasket first through groove 311 and an upper sealing gasket second through groove 312 are respectively provided on the upper sealing gasket 31 to fit the upper fixing platform first welding cavity 13 and the upper fixing platform second welding cavity 14, and the upper sealing gasket 31 can seal the gap between the upper bearing platform 11 and the upper loading platform 21; a lower sealing gasket 32 ​​is provided between the lower bearing platform 21 and the lower loading platform 22, and a lower sealing gasket first through groove 321 is provided on the lower sealing gasket 32 ​​to fit the lower fixing platform first welding cavity 23, and the lower sealing gasket 32 ​​can seal the gap between the lower bearing platform 21 and the lower loading platform 22. The upper sealing gasket 31 and the lower sealing gasket 32 ​​can prevent the protective gas from leaking.

[0064] Based on the above auxiliary connection device of the metal and carbon fiber thermoplastic composite material special-shaped joint, the present invention also provides:

[0065] A connection device for special-shaped joints of metal and carbon fiber thermoplastic composite materials comprises the auxiliary connection device for the special-shaped joints of metal and carbon fiber thermoplastic composite materials, and also comprises a manipulator and laser welding equipment.

[0066] Wherein, the manipulator includes an upper fixed platform manipulator and a lower fixed platform manipulator, the upper fixed platform is fixedly mounted on the upper fixed platform manipulator, and the lower fixed platform is fixedly mounted on the lower fixed platform manipulator. The upper supporting platform 11 is provided with an upper manipulator fixed end 19 and is fixedly connected to the upper fixed platform manipulator through the upper manipulator fixed end 19; the lower supporting platform 21 is provided with a lower manipulator fixed end 29 and is fixedly connected to the lower fixed platform manipulator through the lower manipulator fixed end 29. The laser welding equipment includes a first laser welding equipment, a second laser welding equipment and a third laser welding equipment, the first laser welding equipment is located in the first welding cavity 13 of the upper fixed platform to perform laser welding work, the second laser welding equipment is located in the second welding cavity 14 of the upper fixed platform to perform laser welding work, and the third laser welding equipment is located in the first welding cavity 23 of the lower fixed platform to perform laser welding work.

[0067] When the connection device of the special-shaped joint of the metal and the carbon fiber thermoplastic composite material is used, the upper fixed platform can automatically absorb and position the metal connection reinforcement structure 91 to be welded before welding with the assistance of the upper fixed platform manipulator, and input the protective gas into the upper fixed platform first welding cavity 13 and the upper fixed platform second welding cavity 14 of the upper fixed platform to form the processing surface protection and reduce oxidation. The lower fixed platform can absorb and fix the metal plate 92 to be welded with the assistance of the lower fixed platform manipulator, and pre-place it on the welding support frame. And input the protective gas into the lower fixed platform first welding cavity 23 of the lower fixed platform to form the processing surface protection and reduce oxidation. The upper fixed platform and the lower fixed platform can be assisted by the upper fixed platform manipulator and the lower fixed platform manipulator, and the position of the carbon fiber thermoplastic composite material 93 can be quickly moved to the predetermined position, and the position of the carbon fiber thermoplastic composite material 93 can be limited. After it is placed, a preset pressure is applied. Then, the fiber laser carried by the manipulator implements welding with preset parameters in the upper fixed platform first welding cavity 13 and the upper fixed platform second welding cavity 14 respectively. After welding, the vacuum adsorption system is unloaded, and the welded metal plate and carbon fiber thermoplastic composite special-shaped joint are placed on the welding support frame and taken away by the robot behind. This device can make full use of the automation of the robot, implement efficient and fast processing, and ensure the quality of welding. Moreover, the special-shaped metal and carbon fiber thermoplastic composite joints can make full use of the double sides of the carbon fiber thermoplastic composite to construct the connection interface, and can reduce the shear effect when stressed, greatly improving the mechanical properties of the connection joint.

[0068] Implementation 1:

[0069] Laser connection of special-shaped structures is carried out for pure aluminum plates and carbon fiber reinforced resin composite materials. The thickness of pure aluminum plates is 2.0mm, the thickness of carbon fiber reinforced resin composite materials is 2.5mm, the thickness of special-shaped connected pure aluminum parts is 2.0mm, and the bending height is 2.5mm. First, the upper fixed table is controlled by a manipulator to move to the placement area of ​​special-shaped connected pure aluminum parts, approach and fix them by vacuum adsorption; at the same time, argon gas is introduced through the protective gas input system of the upper fixed table, so that the cavities of the metal laser welding area and the metal / carbon fiber thermoplastic composite welding area are filled with argon gas. Then, the lower fixed table is controlled by a manipulator to move to the pure aluminum plate placement area, approach and fix them by vacuum adsorption, and then move to the designated position of the welding support frame; nitrogen is introduced by the protective gas input system to fill the cavity of the welding cavity with nitrogen. At the same time, the upper fixed table controlled by the manipulator carries the special-shaped pure aluminum parts to the designated position on the upper part of the pure aluminum plate. At this time, the carbon fiber thermoplastic composite plate is fed in and positioned by the special-shaped pure aluminum parts to realize the automatic assembly of the aluminum plate, carbon fiber thermoplastic composite plate and special-shaped pure aluminum parts before welding. At this time, the robot arm carrying the fiber laser moves to the metal welding area and the upper and lower metal / carbon fiber thermoplastic composite welding areas in turn, and carries out laser welding with predetermined process parameters. After the welding is completed, the vacuum adsorption system of the upper and lower fixed tables is unloaded, leaving the welded pure aluminum and carbon fiber reinforced resin composite special-shaped structure on the welding support frame, and the welded parts can be taken away by other robots.

[0070] The above is a specific description of the preferred implementation of the present invention, but the invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. An auxiliary connection device for special-shaped joints of metal and carbon fiber thermoplastic composite materials, characterized in that: It includes an upper fixed platform and a lower fixed platform, wherein: The upper fixed platform comprises an upper bearing platform (11) and an upper loading platform (12); the upper bearing platform (11) is provided with an upper bearing platform first through groove (111) and an upper bearing platform second through groove (112) which are connected vertically; the upper loading platform (12) is provided with an upper loading platform first groove (121) and an upper loading platform second groove (122); the upper bearing platform first through groove (111) and the upper loading platform first groove (121) cooperate with each other and jointly form an upper fixed platform first welding cavity (13); the upper bearing platform second through groove (112) and the upper loading platform second groove (122) cooperate with each other and jointly form an upper fixed platform second welding cavity (14); the upper fixed platform first welding cavity (13) is used to realize the welding connection between the metal connection reinforcement structure (91) and the metal plate (92); the upper fixed platform second welding cavity (14) is used to realize the welding connection between the metal connection reinforcement structure (91) and the first surface of the carbon fiber thermoplastic composite material (93); The lower fixed platform comprises a lower bearing platform (21) and a lower loading platform (22); the lower bearing platform (21) is provided with a lower bearing platform first through groove (211) which passes through from top to bottom; the lower loading platform (22) is provided with a lower loading platform first groove (221); the lower bearing platform first through groove (211) and the lower loading platform first groove (221) cooperate with each other and jointly form a lower fixed platform first welding cavity (23); the lower fixed platform first welding cavity (23) is used to realize welding connection between the metal plate (92) and the second surface of the carbon fiber thermoplastic composite material (93); An upper protective gas delivery pipeline (15) is arranged inside the upper bearing platform (11) and / or the upper loading platform (12), and the upper protective gas delivery pipeline (15) is connected to an external protective gas delivery source and communicates with the first welding chamber (13) of the upper fixed platform and the second welding chamber (14) of the upper fixed platform to deliver the protective gas to the first welding chamber (13) of the upper fixed platform and the second welding chamber (14) of the upper fixed platform; A lower protective gas delivery pipeline (25) is provided inside the lower bearing platform (21) or / and the lower loading platform (22), and the lower protective gas delivery pipeline (25) is connected to an external protective gas delivery source and communicated with the first welding cavity (23) of the lower fixed platform to deliver the protective gas to the first welding cavity (23) of the lower fixed platform; An upper negative pressure pipeline (16) connected to an external negative pressure source is provided inside the upper loading platform (12), and an upper adsorption head (17) connected to the upper negative pressure pipeline (16) is provided on the loading surface of the upper loading platform (12); The lower loading platform (22) is provided with a lower negative pressure pipeline (26) in communication with an external negative pressure source, and the loading surface of the lower loading platform (22) is provided with a lower adsorption head (27) in communication with the lower negative pressure pipeline (26).

2. The auxiliary connection device of a metal and carbon fiber thermoplastic composite material special-shaped 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 special-shaped surface whose shape is adapted to the metal connection strengthening structure (91); the lower loading platform (22) has a loading surface, and the loading surface of the lower loading platform (22) is a special-shaped surface whose shape is adapted to the metal plate (92); The upper loading platform (12) has an upper positioning recess on its loading surface, and the upper positioning recess is used to position the metal connection reinforcement structure (91). The lower loading platform (22) has a lower positioning recess on its loading surface, and the lower positioning recess is used to position the metal plate (92).

3. The auxiliary connection device of a metal and carbon fiber thermoplastic composite material special-shaped joint according to claim 1, characterized in that: The upper protective gas delivery pipeline (15) is arranged inside the upper supporting platform (11), and an upper gas connector (151) is arranged on the upper surface of the upper supporting platform (11). The upper gas connector (151) is in communication with the upper protective gas delivery pipeline (15) and is used to be connected to an external protective gas delivery source through a pipeline; The lower protective gas delivery pipeline (25) is arranged inside the lower supporting platform (21), and a lower gas connector (251) is arranged on the upper surface of the lower supporting platform (21). 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 of a metal and carbon fiber thermoplastic composite material special-shaped joint according to claim 1, characterized in that: The upper protective gas delivery pipeline (15) comprises an upper main pipeline and a plurality of upper branch pipelines connected to the upper main pipeline, wherein the upper branch pipelines are connected to the first welding chamber (13) of the upper fixing platform and the second welding chamber (15) of the upper fixing platform; The lower protective gas delivery pipeline (25) comprises a lower main pipeline and a plurality of lower branch pipelines connected to the lower main pipeline, and the lower branch pipelines are connected to the first welding chamber (23) of the lower fixing platform.

5. The auxiliary connection device of a metal and carbon fiber thermoplastic composite material special-shaped joint according to claim 1, characterized in that: An upper negative pressure joint (161) is provided on the side of the upper loading platform (12), the upper negative pressure joint (161) is in communication with the upper negative pressure pipeline (16) and is used to connect to an external negative pressure source through a pipeline, the upper adsorption head (17) is an upper negative pressure suction head, and the upper negative pressure suction head is a rubber suction head and has a plurality of them; A lower negative pressure joint (261) is provided on the side of the lower loading platform (22), and the lower negative pressure joint (261) is in communication with the lower negative pressure pipeline (26) and is used to be connected to an external negative pressure source through a pipeline. The lower adsorption head (27) is a lower negative pressure suction head, and the lower negative pressure suction head is a rubber suction head and has a plurality of them.

6. The auxiliary connection device of a metal and carbon fiber thermoplastic composite material special-shaped joint according to claim 1, characterized in that: The upper bearing platform (11) is fixedly connected to the upper loading platform (12) via an upper fixing bolt (18), and the lower bearing platform (21) is fixedly connected to the lower loading platform (22) via a lower fixing bolt (28); An upper sealing gasket (31) is arranged between the upper bearing platform (11) and the upper loading platform (12), and the upper sealing gasket (31) is provided with an upper sealing gasket first through groove (311) and an upper sealing gasket second through groove (312) respectively adapted to the upper fixing platform first welding cavity (13) and the upper fixing platform second welding cavity (14); A lower sealing pad (32) is provided between the lower bearing platform (21) and the lower loading platform (22), and a lower sealing pad first through groove (321) adapted to the first welding cavity (23) of the lower fixing platform is provided on the lower sealing pad (32).

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

8. A connection device for special-shaped joints of metal and carbon fiber thermoplastic composite materials, characterized in that: The invention comprises a connecting device of a special-shaped joint of metal and carbon fiber thermoplastic composite material as described in any one of claims 1 to 7, and also comprises a manipulator and laser welding equipment.

9. The connection device of a metal and carbon fiber thermoplastic composite material special-shaped joint according to claim 8, characterized in that: The manipulator comprises an upper fixed platform manipulator and a lower fixed platform manipulator, the upper fixed platform is fixedly mounted on the upper fixed platform manipulator, and the lower fixed platform is fixedly mounted on the lower fixed platform manipulator; The upper supporting platform (11) is provided with an upper manipulator fixed end (19) and is fixedly connected to the upper fixed platform manipulator via the upper manipulator fixed end (19); the lower supporting platform (21) is provided with a lower manipulator fixed end (29) and is fixedly connected to the lower fixed platform manipulator via the lower manipulator fixed end (29).

10. The connection device of a metal and carbon fiber thermoplastic composite material special-shaped joint according to claim 8, characterized in that: The laser welding equipment comprises a first laser welding equipment, a second laser welding equipment and a third laser welding equipment, wherein the first laser welding equipment is located in a first welding cavity (13) of the upper fixed platform to perform laser welding, the second laser welding equipment is located in a second welding cavity (14) of the upper fixed platform to perform laser welding, and the third laser welding equipment is located in a first welding cavity (23) of the lower fixed platform to perform laser welding.

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