Welding equipment and method

Abstract

The invention provides welding equipment and method, and the welding equipment comprises a film pressing mechanism which comprises a bottom plate, a top plate and a connecting table; the polymer heating mechanism comprises a mounting plate, a heating cavity and two hot air supply assemblies, the heating cavity is formed in the mounting plate, and the two hot air supply assemblies are arranged on the two opposite sides in the thickness direction of the heating cavity correspondingly and communicate with the heating cavity; and the metal activation mechanism comprises a supporting table and a metal activation assembly, the metal activation assembly comprises a graphene heating module, and the metal to be connected is arranged in the graphene heating module in a penetrating mode. Compared with a conventional connection technology, local hot melting of the polymer, directional activation of the metal colloid and flexible press-fit solidification are integrated, the problems of overheat deformation of the polymer and metal heat loss are avoided, a filling gap between an interface and the colloid is reinforced and connected, the processing quality and strength of a product are remarkably improved, and the service life of the product is prolonged. And a new thought is provided for connection processing of different base material structures.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of material connection, in particular to a welding device and method. BACKGROUND

[0002] In the fields of automobile manufacturing, electronic equipment, medical devices and smart home, in order to achieve the design goals of product lightweight, functional integration and cost optimization, the combination of metal components and polymer components such as plastics has become the mainstream trend in the industry. For example, the connection of metal brackets and polymer pipelines in the engine compartment of a car, the assembly of metal middle frames and polymer housings in consumer electronic devices, and the combination of metal connectors and polymer functional components in medical devices, all require reliable connection technology to achieve stable combination of the two.

[0003] However, there are essential differences in the material properties of metal and polymer such as plastic, which leads to significant technical bottlenecks in effective connection between the two. On the one hand, metal surfaces are usually highly dense and chemically inert, while polymer materials are mostly non-polar or weakly polar molecular structures, and the interface compatibility of the two is very poor, making it difficult to form stable binding force through conventional physical contact. On the other hand, the mechanical properties of metal and polymer, such as thermal expansion coefficient and elastic modulus, differ greatly, and during processing and molding, micro-cracks may occur at the interface due to stress concentration, further weakening the connection reliability.

[0004] Currently, the commonly used connection methods in the industry mainly include mechanical fastener connection, adhesive bonding and hot melt welding, etc., but all have obvious defects: when using mechanical connection, the assembly position of screws or buckles is prone to form stress concentration points, which may loosen over time due to vibration, and the assembly gap is difficult to eliminate, which may cause liquid leakage or gas leakage; hot melt welding requires the hot melt fluidity of polymer materials to achieve interface fusion, but the high thermal conductivity of metal quickly dissipates heat, making it difficult to maintain the temperature of the welding area, which may cause problems such as virtual welding and cracking of welding marks, and cannot guarantee stable connection strength.

[0005] The above problems directly lead to the common defects of low connection strength and poor interface sealing of the assembled products of metal and polymer components, which not only affects the structural stability and service life of the products, but also may cause safety hazards, becoming a key technical obstacle restricting the performance upgrade of products in related fields. Therefore, it is an urgent core demand of the industry to develop a technical solution that can break through the limitations of material properties and achieve efficient, stable and gap-free connection of metal and polymer. SUMMARY

[0006] Therefore, the technical problem to be solved by the present application is to overcome the problem of low connection strength of metal and polymer in the prior art, and to provide a welding device and method.

[0007] To solve the above technical problems, the present application provides a welding device, which comprises a film pressing mechanism, a polymer heating mechanism and a metal activating mechanism.

[0008] In an embodiment of the present application, the hot gas supply assembly comprises a connecting piece and a plurality of gas supply pipes, one side of the connecting piece being in communication with the heating cavity and the other side being in communication with the plurality of gas supply pipes, in the vertical direction, the plurality of gas supply pipes all extend towards the connecting table on the same side, and are arranged according to the shape of the polymer half-piece.

[0009] In an embodiment of the present application, the polymer heating mechanism further comprises a gas transmission docking piece, the gas transmission docking piece being provided with a plurality of gas transmission interfaces, both ends of the gas transmission interface being in communication with the external gas supply equipment and the hot gas supply assembly through the communication pipeline.

[0010] In an embodiment of the present application, the metal activating assembly comprises a fixed shell, a moving shell and two graphene heating modules, the moving shell being fitted above the fixed shell, the two graphene heating modules being connected to the fixed shell and the moving shell respectively and being symmetrically arranged in the vertical direction, and the end of the metal to be connected coated with glue can be inserted between the two graphene heating modules.

[0011] In an embodiment of the present application, the metal activating assembly further comprises a bracket and a lifting driver, the lifting driver and the fixed shell being fixedly connected to the bracket, and the moving shell being connected to the working end of the lifting driver to move up and down above the fixed shell.

[0012] In one embodiment of the present invention, the graphene heating module includes a contoured graphene and a conductive part. The contoured graphene has a relief groove in the middle. The relief grooves of the two graphene heating modules together enclose a heating space. The conductive part is connected to the contoured graphene and is connected to an external power supply device.

[0013] In one embodiment of the present invention, the metal activation mechanism further includes a slide table slidably connected to the support platform, the metal to be connected is connected to the slide table, and enters / exits the heating space through the slide table.

[0014] In one embodiment of the present invention, the base plate is provided with at least two bottom support columns extending in a vertical direction, the mounting plate is provided with at least two middle support columns extending in a vertical direction, and the top plate is provided with at least two top support columns extending in a vertical direction. The middle support columns can be supported on the bottom support columns one by one, and the top support columns can be supported on the bottom support columns or the middle support columns one by one.

[0015] This invention provides a welding method for joining metal and polymer using the aforementioned welding equipment, comprising: step S1, coating the surface of the metal to be joined with an adhesive; step S2, heating the metal to be joined to activate the adhesive coated thereon, while simultaneously heating two polymer halves until their surfaces soften; step S3, joining the activated adhesive on the metal to one of the polymer halves to obtain a joined semi-finished product; step S4, pressing the other polymer halves to the polymer halves in the joined semi-finished product; and step S5, after resting and cooling, completing the welding process.

[0016] In one embodiment of the present invention, in step S2, the end of the metal to be connected coated with the colloid is moved into the metal activation component, and then the graphene heating module in the metal activation component is energized to perform circumferential heat treatment on the end of the metal to be connected coated with the colloid; at the same time, the two polymer halves are moved to the two working ends of the hot gas supply component, and then inert gas is introduced into the heating chamber of the hot gas supply component. After being heated by the heating chamber, the inert gas is supplied to the two polymer halves through multiple gas supply pipes until their surfaces are thermally softened.

[0017] The technical solution of the present invention has the following advantages compared with the prior art: The welding equipment and method of this invention involves a polymer heating mechanism to heat-melt the polymer halves to be joined, a metal activation mechanism to activate the metal to be joined using a colloid, and then a pressing mechanism to press the metal into the two polymer halves, thereby completing the metal-polymer joining process. In this process, the colloid at the metal ends can bond to the polymer halves after cooling and solidification. Simultaneously, the slightly heat-melted polymer halves can achieve a high degree of adhesion to the metal surface during the heat-melting process, forming a seamless, high-strength connection structure with the colloid.

[0018] Compared to conventional bonding technologies, this application integrates localized polymer thermal melting, directional activation of metal colloids, and flexible compression curing into one unit. This avoids the problems of polymer overheating and deformation and metal heat loss, while also strengthening the filling gap between the interface and the colloid, significantly improving the processing quality and strength of the product and providing a new approach for bonding processing of different substrate structures. Attached Figure Description

[0019] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0020] Figure 1 This is a three-dimensional structural diagram of the welding equipment in a preferred embodiment of the present invention; Figure 2 yes Figure 1 A three-dimensional structural diagram of the metal activation mechanism, base plate, and connecting platform on the welding equipment shown. Figure 3 yes Figure 1 A three-dimensional structural diagram of part of the top plate and the connecting platform on it in the welding equipment shown. Figure 4 yes Figure 1 A three-dimensional structural diagram of the polymer heating mechanism in the welding equipment shown. Figure 5 yes Figure 4 Enlarged structural diagram at point A in the middle; Figure 6 yes Figure 1 A three-dimensional structural schematic diagram of the metal activation component in the welding equipment shown. Figure 7 yes Figure 6 The diagram shows a three-dimensional structural schematic of the graphene heating module in the metal activation component.

[0021] Explanation of reference numerals in the accompanying drawings: 100, pressing mechanism; 110, base plate; 111, bottom support column; 120, top plate; 121, top support column; 130, connecting platform; 200, polymer heating mechanism; 210, mounting plate; 211, middle support column; 220, heating chamber; 230, hot gas supply assembly; 231, connector; 232, gas supply pipe; 240, gas transmission interface; 300, metal activation mechanism; 310, support platform; 320, slide table; 330, metal activation assembly; 331, moving housing; 332, fixed housing; 333, bracket; 334, lifting driver; 335, graphene heating module; 3351, contoured graphene; 3352, conductive part; 400, metal to be connected; 500, polymer half-body. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0023] Example 1:

[0024] This embodiment provides a welding device for connecting polyethylene elements to the end of a metal tube. It should be noted that in the prior art, due to the problem of poor interface compatibility, there are generally problems such as low connection strength, large connection gaps, and complex and cumbersome processing between metal tubes and plastic products. Based on this, this application proposes the following solution.

[0025] See Figure 1 As shown, the welding equipment described in this embodiment includes: A film pressing mechanism 100 includes a base plate 110, a top plate 120, and two connecting platforms 130. The two connecting platforms 130 are respectively connected to the base plate 110 and the top plate 120 and are symmetrically arranged in the vertical direction. Polymer half-pieces 500 are connected to each of the two connecting platforms 130. The top plate 120 moves up and down above the base plate 110 to drive the two polymer half-pieces 500 to move relative to each other. The polymer heating mechanism 200 includes a mounting plate 210, a heating chamber 220, and two hot gas supply components 230. The mounting plate 210 is movable between the top plate 120 and the bottom plate 110. The heating chamber 220 is disposed on the mounting plate 210, has a heating element inside, and is connected to an external gas supply device. The two hot gas supply components 230 are respectively disposed on opposite sides of the heating chamber 220 in the thickness direction, and are both connected to the heating chamber 220 to heat two polymer half-pieces 500 respectively. A metal activation mechanism 300 is disposed on the base plate 110. It includes a support platform 310 and a metal activation component 330. The support platform 310 is disposed on one side of the connecting platform 130 of the base plate 110. The metal activation component 330 is disposed at one end of the support platform 310 and includes a graphene heating module 335. The metal 400 to be connected is supported on the support platform 310, and its end coated with colloid passes through the heating space of the graphene heating module 335.

[0026] The welding equipment described in this embodiment uses a polymer heating mechanism 200 to heat-melt the polymer halves 500 to be joined, and a metal activation mechanism 300 to activate the metal to be joined using an adhesive. Then, a pressing mechanism 100 presses the metal together to join the two polymer halves 500, thus completing the metal-polymer joining process. During this process, the adhesive at the metal ends can bond to the polymer halves 500 after cooling and solidification. Simultaneously, the slightly heat-melted polymer halves 500 can achieve a high degree of adhesion to the metal surface during the heat-melting process, forming a seamless, high-strength connection structure with the adhesive.

[0027] In this embodiment, the pressing mechanism 100 serves as the core pressing execution unit for the polymer half-piece 500. Through the structural design of the base plate 110, top plate 120, and two connecting platforms 130, it achieves stable support and precise relative movement of the polymer half-piece 500. The base plate 110 provides a fixed support foundation for the entire mechanism, ensuring overall stability during operation. The top plate 120 corresponds vertically to the base plate 110 and can move vertically up and down. Its lifting action directly drives the two connecting platforms 130 to move the polymer half-piece 500 closer or further apart. (See [reference]). Figure 2 As shown, in this embodiment, the polymer half-body 500 to be processed is installed by the connecting table. The connecting table 130 can accurately fix the position of the polymer half-body 500, avoid component displacement during processing, and ensure that the areas to be connected of the two polymer half-body 500 are always aligned. On the other hand, it is also used to cooperate with the metal activation mechanism 300 to realize the subsequent assembly and pressing process.

[0028] Furthermore, in this embodiment, the base plate 110 is provided with at least two bottom support columns 111 extending vertically, and the top plate 120 is provided with at least two top support columns 121 extending vertically. The top support columns 121 can be supported one-to-one on the bottom support columns 111. Based on the above structural design, when the top plate 120 descends vertically to drive the polymer half-piece 500 to press, the top support columns 121 move down synchronously with the top plate 120 until they precisely fit and support the bottom support columns 111. At this point, the top plate 120 cannot continue to descend, thereby strictly limiting the maximum descent distance of the top plate 120 and avoiding damage to the polymer half-piece 500, deformation of metal parts, or extrusion of the colloid due to excessive descent of the top plate 120, thus ensuring the safety of the pressing process and the integrity of the components. In addition, the precise docking of the top support column 121 and the bottom support column 111 can correct any slight deviation that may occur during the lifting and lowering of the top plate 120, so that the top plate 120 always moves smoothly in the vertical direction. This ensures that the polymer half-pieces 500 driven by the two connecting platforms 130 always remain symmetrically aligned, avoiding uneven force or misalignment of the polymer half-pieces 500 caused by the tilt of the top plate 120, and providing positioning assurance for the subsequent seamless pressing with the metal parts.

[0029] Furthermore, the two connecting platforms 130 in this embodiment are installed in the same way. Here, the structure of the connecting platform 130 on the top plate 120 machine is described as an example: See Figure 3 As shown, in this embodiment, the connecting platform 130 extends perpendicularly to the top plate 120, and its extended end is provided with a contour groove that matches the shape of the polymer half-body 500 to be connected. In the actual installation process, the polymer half-body 500 to be connected can be detachably connected to the connecting platform 130 through a structure such as a clip or bolt. This application does not impose any specific limitations on this.

[0030] See Figure 4 As shown, the polymer heating mechanism 200 in this embodiment addresses the heat-melting requirements of the polymer half-piece 500 by cooperating with the mounting plate 210, the heating chamber 220, and two hot air supply components 230 to achieve directional and uniform heating. The mounting plate 210 is designed to connect to an external mobile device, enabling it to move. Before heating, it can be moved to the processing area between the top plate 120 and the bottom plate 110; after heating, it can be removed to avoid pressing the polymer half-piece 500. Furthermore, to improve stability during the heating process, the mounting plate 210 in this embodiment is provided with at least two vertically extending central support columns 211. Each central support column 211 can be supported on a corresponding bottom support column 111, and each top support column 121 can be supported on a corresponding central support column 211.

[0031] Furthermore, the heating chamber 220 is mounted on the mounting plate 210. The internal heating element heats the ambient temperature gas supplied by the external gas supply equipment to the target temperature, forming a stable heat source. Compared to direct heating, heat transfer via hot gas is gentler and avoids localized overheating and carbonization of the polymer. Two hot gas supply components 230 are respectively located on opposite sides of the heating chamber 220 in the thickness direction and are connected to the heating chamber 220. They can simultaneously supply hot gas to the areas to be joined of the two polymer halves 500, ensuring consistent melting progress between the two components. Specifically, this dual-sided synchronous heating design not only shortens the heating time but also ensures uniform melting of the two polymer halves 500, avoiding gaps in the fit caused by excessive or insufficient melting on one side.

[0032] In this embodiment, see Figure 5 As shown, the hot gas supply assembly 230 includes a connector 231 and multiple gas supply pipes 232. One side of the connector 231 is connected to the heating chamber 220, and the other side is connected to the multiple gas supply pipes 232. In the vertical direction, the multiple gas supply pipes 232 all extend towards the connecting platform 130 on the same side and are arranged according to the shape of the polymer half-piece 500. The connector 231 serves as a hot gas transfer and distribution component: one side is connected to the heating chamber 220, which can stably receive the high-temperature gas heated by the heating element in the heating chamber 220, avoiding leakage or temperature loss of hot gas during transmission; the other side is connected to the multiple gas supply pipes 232, which can evenly distribute the received high-temperature gas to each gas supply pipe 232, ensuring that the hot gas flow rate and temperature output from each gas supply pipe 232 are consistent. This provides a basis for the uniform heating of the polymer half-piece 500 and avoids problems such as excessive or insufficient local melting of the polymer due to uneven hot gas distribution. In the vertical direction, all air supply pipes 232 extend towards the connecting platform 130 on the same side, directly guiding the high-temperature hot air diverted by the connector 231 to the polymer half-body 500 fixed on the connecting platform 130. This ensures that the hot air is precisely applied to the area of ​​the polymer half-body 500 to be connected, reducing the diffusion of hot air into the surrounding environment, improving thermal energy utilization, and preventing other structures of the equipment from being affected by the high-temperature hot air. The arrangement of the air supply pipes 232 according to the shape of the polymer half-body 500 ensures that the hot air can fully cover the area of ​​the polymer half-body 500 to be connected, with no heating dead spots. This allows all parts of the surface of the polymer half-body 500 to reach a slightly molten state simultaneously, ensuring consistent adhesion when pressed with the metal parts later and further reducing the possibility of interface gaps.

[0033] Furthermore, the polymer heating mechanism 200 also includes a gas transmission docking component, which has multiple gas transmission interfaces 240. The two ends of each gas transmission interface 240 are connected to an external gas supply device and the hot gas supply component 230 respectively via connecting pipes. The gas transmission docking component is used to achieve stable gas supply transfer and multi-path distribution: the multiple gas transmission interfaces 240 on the gas transmission docking component, with their two ends connected to the external gas supply device and the hot gas supply component 230 respectively via connecting pipes, ensure a stable gas source and controllable pressure. The design of multiple gas transmission interfaces 240 can flexibly adapt to different specifications of external gas supply devices and hot gas supply components 230. Even if the gas supply device is replaced or the number of hot gas supply components 230 is adjusted, there is no need to redesign the overall pipeline; docking can be completed simply by interface matching, improving the equipment's versatility and ease of maintenance.

[0034] In this embodiment, the metal activation mechanism 300 is used to efficiently activate the colloid at the end of the metal part. Through the structural design of the support platform 310 and the metal activation component 330, it realizes stable support of the metal part and directional heating of the colloid. The support platform 310 supports 400 metal parts to be connected, ensuring their fixed position during processing and precisely aligning the end of the metal parts coated with adhesive with the mating area of ​​the two polymer half-parts 500, providing positioning assurance for subsequent pressing and connection. A metal activation component 330 is located at one end of the support platform 310. Its core component is a graphene heating module 335, which forms a heating space within which the end of the 400 metal parts coated with adhesive passes. Utilizing the high thermal conductivity of graphene, the graphene heating module 335 quickly transfers heat to the adhesive at the end of the metal parts, allowing the adhesive to reach its activation temperature in a short time. Compared to traditional hot air heating of metal, this effectively avoids heat loss due to the high thermal conductivity of the metal, significantly improving the adhesive activation efficiency. Simultaneously, the graphene heating module 335 offers strong temperature controllability, precisely matching the activation temperature requirements of different types of adhesives, ensuring stable adhesive activation and providing a reliable guarantee for subsequent bonding with the polymer half-parts 500.

[0035] See Figure 6As shown, the metal activation component 330 includes a fixed housing 332, a movable housing 331, and two graphene heating modules 335. The movable housing 331 is fastened to the top of the fixed housing 332. The two graphene heating modules 335 are respectively connected to the fixed housing 332 and the movable housing 331, and are symmetrically arranged in the vertical direction. The end of the metal 400 to be connected, coated with colloid, can pass through the two graphene heating modules 335. The fixed housing 332 serves as the basic load-bearing structure, providing stable support for the entire component. It is fixedly mounted on one end of the support platform 310, providing a firm mounting reference for the graphene heating modules 335 below, ensuring the stability of the heating modules during operation and preventing displacement of the heating position due to equipment vibration. The movable housing 331 can be fastened to the fixed housing 332, and the opening and closing action enables the placement and encapsulation of metal parts: when fastened, the movable housing 331 and the fixed housing 332 form a heating space, encapsulating the two graphene heating modules 335 and the glued ends of the metal parts, reducing heat diffusion to the external environment and improving heat utilization efficiency; when opened, the 400 metal parts to be connected can be easily placed in or removed, facilitating operation. Specifically, to improve operational safety, the substrate of both the fixed housing 332 and the movable housing 331 in this embodiment is preferably ceramic.

[0036] Furthermore, the metal activation component 330 also includes a bracket 333 and a lifting driver 334. The lifting driver 334 and the fixed housing 332 are respectively fixedly connected to the bracket 333. The movable housing 331 is connected to the working end of the lifting driver 334 to move up and down above the fixed housing 332. Specifically, the lifting driver 334 is preferably a linear motor. Before processing, the lifting driver 334 drives the movable housing 331 to rise, opening the space between the fixed housing 332 and the movable housing 331, making it convenient for the operator to place the glued end of the 400 metal parts to be connected above the graphene heating module 335 on the fixed housing 332. During processing, the lifting driver 334 drives the movable housing 331 to fall, so that the movable housing 331 is precisely engaged above the fixed housing 332. At this time, the two graphene heating modules 335 form a heating space to wrap the glued end of the metal parts, ensuring concentrated heat. After processing, the lifting driver 334 drives the movable housing 331 to rise again, making it easy to remove the metal parts that have been activated by the colloid.

[0037] See Figure 7As shown, the graphene heating module 335 in this embodiment includes a contoured graphene 3351 and a conductive part 3352. The contoured graphene 3351 has a clearance groove in its middle. The clearance grooves of the two graphene heating modules 335 together enclose a heating space. The conductive part 3352 is connected to the contoured graphene 3351 and is connected to an external power supply. The contoured graphene 3351 is designed to fit the shape of the adhesive-coated end of the metal part. When the contoured graphene 3351s of the two graphene heating modules 335 are aligned, the clearance grooves together enclose a heating space that perfectly matches the adhesive-coated end of the metal part. This allows the contoured graphene 3351 to tightly fit the adhesive-coated area of ​​the metal part, avoiding heat waste due to excessive heating space or metal part jamming due to insufficient heating space, ensuring that heat is directly applied to the adhesive. The conductive part 3352 is connected to the contoured graphene 3351. Furthermore, the external power supply device serves to stably transfer electrical energy to the contoured graphene 3351, enabling the contoured graphene 3351 to rapidly heat up to the temperature required for colloid activation. Relying on the high thermal conductivity of graphene, heat can be instantly and evenly transferred to the entire surface of the contoured graphene 3351, and then transferred to the adhesive-coated end of the metal part through the fitted clearance groove area, achieving uniform activation of the colloid from the outside to the inside, avoiding local overheating or inactivation, and ensuring a firm bond between the metal and the polymer in the future.

[0038] This embodiment also includes a slide 320 in the metal activation mechanism 300. The slide 320 is slidably connected to the support platform 310. The metal 400 to be connected is connected to the slide 320 and enters / exits the heating space through the slide 320. Furthermore, the slide 320 can drive the mounted metal part to move horizontally, thereby further improving the assembly accuracy of the metal part and the polymer element and the ease of operation.

[0039] Example 2: This embodiment also provides a welding method, which uses the welding equipment described in Embodiment 1 to join metal and polymer, and includes: Step S1: Apply colloid to the metal surfaces to be connected; Step S2: Heating the metal to be connected to activate the colloid coated on it, and simultaneously heating the two polymer halves until their surfaces soften. Specifically, in this embodiment, step S2 involves: moving the end of the metal to be connected coated with colloid to the metal activation assembly, and then energizing the graphene heating module in the metal activation assembly to perform circumferential heat treatment on the end of the metal to be connected coated with colloid; simultaneously, moving the two polymer halves to the two working ends of the hot gas supply assembly, and then introducing inert gas into the heating chamber of the hot gas supply assembly. After being heated by the heating chamber, the inert gas is supplied to the two polymer halves through multiple gas supply pipes until their surfaces soften.

[0040] Step S3: Connect the activated colloid on the metal to one of the polymer halves to obtain the connected semi-finished product; Step S4: Press the other polymer half-body with the polymer half-body in the connecting semi-finished product; Step S5: After standing still and cooling, the welding process is complete.

[0041] In summary, this application integrates polymer localized thermal melting, metal colloid directional activation, and flexible compression curing into one unit, which not only avoids the problems of polymer overheating and deformation and metal heat loss, but also strengthens the filling gap between the interface and the colloid, significantly improving the processing quality and strength of the product, and providing a new approach for the connection processing of different substrate structures.

[0042] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A welding device, characterized in that: include: A film pressing mechanism includes a base plate, a top plate, and two connecting platforms. The two connecting platforms are respectively connected to the base plate and the top plate and are symmetrically arranged in the vertical direction. Polymer half-pieces are connected to both connecting platforms. The top plate moves up and down above the base plate to drive the two polymer half-pieces to move relative to each other. A polymer heating mechanism includes a mounting plate, a heating chamber, and two hot gas supply components. The mounting plate is movable between the top plate and the bottom plate. The heating chamber is disposed on the mounting plate and contains a heating element and is connected to an external gas supply device. The two hot gas supply components are respectively disposed on opposite sides of the heating chamber in the thickness direction and are both connected to the heating chamber to heat two polymer halves respectively. A metal activation mechanism is disposed on the base plate and includes a support platform and a metal activation component. The support platform is disposed on one side of the connection platform of the base plate, and the metal activation component is disposed at one end of the support platform. The metal to be connected is supported on the support platform, and one end of the metal coated with colloid passes through the heating space of the graphene heating module.

2. The welding equipment according to claim 1, characterized in that: The hot gas supply assembly includes a connector and multiple gas supply pipes. One side of the connector is connected to the heating chamber, and the other side is connected to multiple gas supply pipes. In the vertical direction, the multiple gas supply pipes extend toward the connecting platform on the same side and are arranged according to the shape of the polymer half-piece.

3. The welding equipment according to claim 1, characterized in that: The polymer heating mechanism also includes a gas transmission docking component, which is provided with multiple gas transmission interfaces. The two ends of the gas transmission interfaces are respectively connected to an external gas supply device and the hot gas supply component through connecting pipes.

4. The welding equipment according to claim 1, characterized in that: The metal activation component includes a fixed housing, a movable housing, and two graphene heating modules. The movable housing is fastened to the top of the fixed housing. The two graphene heating modules are respectively connected to the fixed housing and the movable housing and are symmetrically arranged in the vertical direction. The end of the metal to be connected, coated with colloid, can be inserted between the two graphene heating modules.

5. The welding equipment according to claim 4, characterized in that: The metal activation component also includes a bracket and a lifting driver. The lifting driver and the fixed housing are respectively fixed to the bracket, and the movable housing is connected to the working end of the lifting driver to move up and down above the fixed housing.

6. The welding equipment according to claim 4, characterized in that: The graphene heating module includes a contoured graphene and a conductive part. The contoured graphene has a relief groove in the middle. The relief grooves of the two graphene heating modules together enclose a heating space. The conductive part is connected to the contoured graphene and is connected to an external power supply device.

7. The welding equipment according to claim 1, characterized in that: The metal activation mechanism further includes a slide table, which is slidably connected to the support platform. The metal to be connected is connected to the slide table and enters / exits the heating space through the slide table.

8. The welding equipment according to claim 1, characterized in that: The base plate is provided with at least two bottom support columns extending vertically, the mounting plate is provided with at least two middle support columns extending vertically, and the top plate is provided with at least two top support columns extending vertically. The middle support columns can be supported on the bottom support columns one by one, and the top support columns can be supported on the bottom support columns or the middle support columns one by one.

9. A welding method, characterized in that: The metal-polymer bonding is performed using the welding equipment described in any one of claims 1 to 8, comprising: Step S1: Apply colloid to the metal surfaces to be connected; Step S2: Heat the metal to be joined to activate the colloid coated on it, and at the same time, heat the two polymer halves until their surfaces soften. Step S3: Connect the activated colloid on the metal to one of the polymer halves to obtain the connected semi-finished product; Step S4: Press the other polymer half-body with the polymer half-body in the connecting semi-finished product; Step S5: After standing still and cooling, the welding process is complete.

10. The welding method according to claim 9, characterized in that: In step S2, the end of the metal to be connected coated with colloid is moved into the metal activation component. Then, the graphene heating module in the metal activation component is energized to perform circumferential heat treatment on the end of the metal to be connected coated with colloid. At the same time, the two polymer halves are moved to the two working ends of the hot gas supply component. Then, inert gas is introduced into the heating chamber of the hot gas supply component. After being heated by the heating chamber, the inert gas is supplied to the two polymer halves through multiple gas supply pipes until their surfaces are thermally softened.

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