A continuous diffusion bonding apparatus

Abstract

The utility model relates to a kind of continuous diffusion welding equipment, comprising: feeding unit, including feeding conveyor;Discharge unit, including discharge conveyor;Processing unit, the processing unit includes tunnel furnace and cooling tunnel connected, the tunnel furnace is equipped with pressurizing mechanism, the inside of tunnel furnace and cooling tunnel is equipped with tray conveying device;Circulating conveying unit, the circulating conveying unit includes circulating conveyor belt;Wherein, the both ends of the tray conveying device are connected with the feeding conveyor and discharge conveyor respectively, the both ends of the circulating conveyor belt are connected with the feeding conveyor and discharge conveyor respectively, so that the feeding unit, processing unit, discharge unit and circulating conveying unit are sequentially connected in order, form continuous circulating processing line.The utility model degree of automation is high, can effectively guarantee the safety of welding worker, and can realize continuous uninterrupted circulating processing effect, improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of welding processing technology, and more specifically, to a continuous diffusion welding device. Background Technology

[0002] Diffusion welding is a solid-state welding method that places closely contacting workpieces in a vacuum or protective atmosphere and applies pressure at high temperature to allow atoms at the contact interface to diffuse into each other, thereby achieving a reliable connection.

[0003] Existing diffusion welding is usually carried out in a welding furnace. Workpieces are manually fed into the furnace in batches, and then removed after welding is completed. This method has a long waiting time and low production efficiency. In addition, the loading and unloading processes during welding are all done manually. This method is not only inefficient, but also poses a high safety risk as the welding temperature is usually very high and can easily cause injury to workers. Utility Model Content

[0004] In view of this, the present invention provides a continuous diffusion welding equipment, which can automatically complete the feeding of workpieces and diffusion welding processing, and achieve a continuous and uninterrupted cyclic processing effect, effectively improving production efficiency and the safety of workers.

[0005] The objective of this utility model is achieved through the following technical solution.

[0006] A continuous diffusion welding equipment includes: a feeding unit including a feeding conveyor; a discharging unit including a discharging conveyor; a processing unit located between the feeding unit and the discharging unit, the processing unit including a tunnel furnace and a cooling tunnel connected together, the tunnel furnace being equipped with a pressurizing mechanism, and a material tray conveying device being provided inside the tunnel furnace and the cooling tunnel; and a circulating conveying unit located between the feeding unit and the discharging unit, the circulating conveying unit including a circulating conveyor belt; wherein, both ends of the material tray conveying device are respectively connected to the feeding conveyor and the discharging conveyor, and both ends of the circulating conveyor belt are respectively connected to the feeding conveyor and the discharging conveyor, thereby connecting the feeding unit, the processing unit, the discharging unit, and the circulating conveying unit end to end to form a continuous circulating processing line.

[0007] In the above technical solution, the feeding conveyor, the tray conveyor, the discharging conveyor, and the circulating conveyor belt are used to transport the trays. In specific operation, the trays containing workpieces are loaded onto the circulating conveyor belt by the operator. The trays are first transported to the feeding conveyor, and then to the tray conveyor. The tray conveyor first transports the trays into the tunnel furnace. Under the heating of the tunnel furnace and the pressure of the pressure mechanism, the workpieces in the trays are subjected to diffusion welding. After diffusion welding is completed, the trays are moved to the cooling tunnel for air cooling by the tray conveyor. After cooling, they are sent to the discharging conveyor, which transports the trays back to the circulating conveyor belt for the operator to collect. Overall, the workpiece trays start from the circulating conveyor unit, then pass through the feeding unit, processing unit, and discharging unit in sequence, and finally return to the circulating conveyor unit, achieving a continuous and uninterrupted processing effect with high production continuity and efficiency.

[0008] In one example of this utility model, the feeding unit includes a feeding transition chamber, and the feeding conveying device is disposed inside the feeding transition chamber; the inlet of the feeding transition chamber is located at one end of the circulating conveyor belt, and the outlet of the feeding transition chamber is connected to the tunnel furnace; both the inlet and outlet of the feeding transition chamber are provided with openable and sealable doors.

[0009] In the above technical solution, since diffusion welding needs to be carried out in a vacuum environment or a protective atmosphere, in order to avoid affecting the processing environment of the tunnel furnace, a feeding transition chamber is set up to store the workpiece before it enters the tunnel furnace. The feeding transition chamber can form a sealed chamber through a sealing door, which is isolated from the external environment. When feeding materials into the tunnel furnace, it can be ensured that the processing environment of the tunnel furnace is not affected.

[0010] In one example of this utility model, the sealing door is provided in the middle of the feeding transition chamber to divide the feeding transition chamber into a first feeding chamber and a second feeding chamber.

[0011] In the above technical solution, by dividing the feed transition chamber into two compartments, when the circulating conveyor belt transports the material tray to one compartment, the other compartment can simultaneously transport the material tray into the tunnel furnace through the sealing of the central sealing door, thereby improving the feeding efficiency without affecting the internal processing environment.

[0012] In one example of this invention, heating rods are evenly distributed on the inner wall of the tunnel furnace.

[0013] In the above technical solution, the high-temperature environment required for diffusion welding is achieved by heating with a heating rod.

[0014] In one example of this utility model, the outer wall of the tunnel furnace is provided with a water-cooling coil.

[0015] In the above technical solution, the water-cooled coil is used to cool the outer shell of the tunnel furnace to prevent the temperature from getting too high and to ensure the safety of the equipment and personnel.

[0016] In one example of this utility model, the pressurizing mechanism includes at least one set of pressurizing components. The pressurizing components include a pressurizing drive and a pressure plate. The pressurizing drive is located at the top of the tunnel furnace, and the pressure plate is located inside the tunnel furnace. The output end of the pressurizing drive is connected to the pressure plate.

[0017] In the above technical solution, when the material tray reaches below the pressure plate, the pressure driving component drives the pressure plate to apply pressure to the workpiece, so that the workpiece completes diffusion welding.

[0018] In one example of this utility model, the pressurizing mechanism further includes a pressure-bearing bracket, which includes a pressure-bearing plate located above the tunnel furnace, and the pressurizing drive component is installed at the bottom of the pressure-bearing plate.

[0019] In the above technical solution, the pressure plate is used to withstand the tensile force when the pressure assembly is working, providing a stable and reliable mounting carrier for the pressure assembly.

[0020] In one example of this utility model, the cooling tunnel is a double-layer structure consisting of an outer shell and an inner liner, and the gap between the outer shell and the inner liner is filled with cooling water.

[0021] In the above technical solution, cooling water can reduce the temperature inside the cooling tunnel, ensuring the cooling effect. At the same time, it can also reduce the temperature of the outer shell of the cooling tunnel, ensuring the safety of the staff.

[0022] In one example of this utility model, the discharge unit includes a discharge transition chamber, and the discharge conveying device is disposed inside the discharge transition chamber; the inlet of the discharge transition chamber is connected to the cooling tunnel, and the outlet of the discharge transition chamber is disposed at one end of the circulating conveyor belt.

[0023] In the above technical solution, the discharge transition chamber is used to store the workpiece trays that are to be discharged after cooling. The discharge isolation chamber isolates the internal environment from the external environment during discharge, ensuring that the internal environment is not affected.

[0024] In one example of this utility model, the discharge transition chamber is provided with two sealing doors, one of which is located in the middle of the discharge transition chamber to divide the discharge transition chamber into a first discharge chamber and a second discharge chamber, and the other sealing door is located at the outlet of the discharge transition chamber; water-cooling coils are provided on the outer wall of the discharge transition chamber.

[0025] In the above technical solution, the sealing door is used to seal the discharge transition chamber to form a closed chamber, so as to avoid affecting the internal processing environment. The water cooling coil is used to cool the outer shell temperature of the discharge transition chamber and reduce the internal temperature, further ensuring that the workpiece and the tray are completely cooled and ensuring the safety of the staff when picking up materials.

[0026] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0027] This invention automatically completes the feeding, welding, cooling, and unloading processes of diffusion welding by setting up a feeding unit, a processing unit, an unloading unit, and a circulating conveying unit. It has a high degree of automation, ensuring the safety of welding workers. At the same time, this invention adopts a continuous circulating processing line structure design, which can achieve continuous and uninterrupted circulating processing, improve the continuity of production, and increase production efficiency. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a perspective view of a continuous diffusion welding device according to an embodiment of the present invention.

[0030] Figure 2 for Figure 1 Top view of a continuous diffusion welding machine.

[0031] Figure 3 This is a perspective view of a tunnel furnace according to an embodiment of the present invention.

[0032] Figure 4 for Figure 3 A three-dimensional view of the central tunnel furnace from another perspective.

[0033] Explanation of the reference numerals in the figure:

[0034] 1-Frame; 2-Feeding unit; 21-Feeding transition chamber; 211-First feeding chamber; 212-Second feeding chamber; 3-Processing unit; 31-Tunnel furnace; 311-Heating rod; 312-Pressure mechanism; 3121-Pressure driving component; 3122-Pressure plate; 3123-Pressure bearing bracket; 3124-Pressure bearing plate; 313-Transfer channel; 32-Cooling tunnel; 33-Plate push rod; 34-Plate track; 4-Discharge unit; 41-Discharge transition chamber; 411-First discharge chamber; 412-Second discharge chamber; 5-Circulating conveying unit; 51-Circulating conveyor belt; 52-Transfer assembly; 521-Drive motor; 522-Transfer block; 6-Sealing door; 7-Water cooling coil; 8-Plate. Detailed Implementation

[0035] To facilitate understanding of this invention, a more comprehensive description will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of the invention. However, this invention can be implemented in many different forms and is not limited to the embodiments described herein.

[0036] Please refer to Figures 1 to 4 In a preferred embodiment, a continuous diffusion welding apparatus is provided, comprising a frame 1, and a feeding unit 2, a discharging unit 4, a processing unit 3, and a circulating conveying unit 5 mounted on the frame 1. The feeding unit 2 includes a feeding conveying device (not shown in the figure); the discharging unit 4 includes a discharging conveying device (not shown in the figure); the processing unit 3 is located between the feeding unit 2 and the discharging unit 4, and the processing unit 3 includes a tunnel furnace 31 and a cooling tunnel 32 connected together. The tunnel furnace 31 is equipped with a pressurizing mechanism 312, and a material tray conveying device is provided inside the tunnel furnace 31 and the cooling tunnel 32; the circulating conveying unit 5 is located between the feeding unit 2 and the discharging unit 4, and the circulating conveying unit 5 includes a circulating conveyor belt 51; wherein, the two ends of the material tray conveying device are respectively connected to the feeding conveying device and the discharging conveying device, and the two ends of the circulating conveyor belt 51 are respectively connected to the feeding conveying device and the discharging conveying device, thereby connecting the feeding unit 2, the processing unit 3, the discharging unit 4, and the circulating conveying unit 5 end to end to form a continuous circulating processing line.

[0037] Preferably, in order to make the overall layout of the equipment more compact and occupy less space, the processing unit 3 and the circulating conveying unit 5 are arranged in parallel between the feeding unit 2 and the discharging unit 4. The conveying direction of the material tray conveying device is parallel to that of the circulating conveyor belt 51, and the conveying direction of the feeding conveying device and the discharging conveying device is perpendicular to that of the material tray conveying device and the circulating conveyor belt 51, so that the overall conveying path is rectangular.

[0038] In practice, external workers load the workpiece onto the circular conveyor belt 51 via a tray 8 containing the workpiece. The circular conveyor belt 51 then transports the tray 8 to the infeed conveyor, which in turn transports the tray 8 to the tray conveyor. The tray conveyor first transports the tray 8 into the tunnel furnace 31. Under the heating of the tunnel furnace 31 and the pressure of the pressure mechanism, the workpiece undergoes diffusion welding. After diffusion welding is completed, the tray conveyor transports the tray 8 into the cooling tunnel 32 for air cooling. The cooled tray 8 is then transported to the discharge conveyor, which returns the tray 8 to the circular conveyor belt 51. Workers then collect the workpiece and the tray 8 after diffusion welding. Overall, the workpiece tray 8 starts from the circular conveyor unit 5, then passes through the infeed unit 2, processing unit 3, and discharge unit 4 in sequence, and finally returns to the circular conveyor unit 5, achieving a continuous and uninterrupted cyclic processing effect with high production continuity and efficiency.

[0039] Preferably, the material tray 8 is made of graphite. Graphite material is resistant to high temperature, has high strength, and is chemically stable, making it suitable for operation in high temperature and high pressure environments.

[0040] Please refer to Figures 1 to 4 In this embodiment, the feeding conveyor, discharging conveyor, and tray conveyor all consist of a track and a push rod (not specifically shown in the figure). The track is used to place the tray 8, and the push rod is connected to a driving component. The driving component drives the push rod to move along the track, thereby pushing the tray 8 on the track and causing it to move along the track direction to achieve the effect of conveying the tray 8. It is understood that using a combination of track and push rod for material conveying is a relatively common conveying method in the prior art, and its specific structure will not be described in detail here.

[0041] For example, refer to Figures 1 to 3 The material tray conveying device consists of a material tray push rod 33 and a material tray track 34, such as... Figure 1 and Figure 2 As shown, the tray track 34 is located inside the tunnel furnace 31 and the cooling tunnel 32. The tray pusher 33 is located on the right side of the tray track 34. The tray pusher 33 is connected to a drive unit. The drive unit moves the tray pusher 33 to push the tray 8 placed in the tray track 34, so that it moves along the tray track 34 to pass through the tunnel furnace 31 and the cooling tunnel 32.

[0042] It is worth mentioning that, such as Figure 1 and Figure 2As shown, both ends of the circulating conveyor belt 51 are equipped with transfer components 52. Each transfer component 52 includes a drive motor 521 and a transfer block 522. The circulating conveyor belt 51 has grooves for the transfer block 522 to slide. The drive motor 521 can drive the transfer block 522 to move along the direction of the circulating conveyor belt 51. Specifically, the transfer block 522 near the infeed transition chamber 21 is used to push the tray 8 into the infeed transition chamber 21, and the transfer block 522 near the discharge transition chamber 41 is used to pull the tray 8 out of the discharge transition chamber 41 onto the circulating conveyor belt 51. By setting up the transfer components 52, the loading and unloading of the tray 8 is completed, eliminating the need for both ends of the circulating conveyor belt 51 to extend into the infeed transition chamber 21 and the discharge transition chamber 41 for installation, thus avoiding affecting the sealing effect and improving the flexibility of use.

[0043] For example, the material transfer assembly 52 is provided with a lead screw, and the material transfer block 522 can be installed on the lead screw nut. The drive motor 521 drives the lead screw to rotate through the belt, thereby driving the lead screw nut to move the material transfer block 522, so as to move the material tray 8.

[0044] It should be noted that in this embodiment, the circulating conveyor belt 51, the feeding conveyor, the material tray conveyor and the discharging conveyor are all step-feeding devices, which feed the material tray 8 according to the set production rhythm.

[0045] Please refer to Figure 1 and Figure 2 The feeding unit 2 includes a feeding transition chamber 21. The feeding conveying device is located inside the feeding transition chamber 21. The feeding transition chamber 21 is equipped with three sealing doors 6. The three sealing doors 6 are respectively located at the entrance, the exit, and the middle of the feeding transition chamber 21. The sealing door 6 located in the middle divides the feeding transition chamber 21 into a first feeding chamber 211 and a second feeding chamber 212. The entrance of the feeding transition chamber 21 is located on the first feeding chamber 211, which is located on one side of the end of the circulating conveyor belt 51. The exit of the feeding transition chamber 21 is located on the second feeding chamber 212, which is connected to the tunnel furnace 31.

[0046] Correspondingly, the discharge unit 4 includes a discharge transition chamber 41, and a discharge conveying device is installed inside the discharge transition chamber 41. The discharge transition chamber is equipped with two sealing doors 6, which are located at the outlet and the middle of the discharge transition chamber 41, respectively. The sealing door 6 located in the middle divides the discharge transition chamber 41 into a first discharge chamber 411 and a second discharge chamber 412. The inlet of the discharge transition chamber 41 is located on the first discharge chamber 411 and is connected to the cooling tunnel 32. The outlet of the discharge transition chamber 41 is located on the second discharge chamber 412 and is located on one side of the starting end of the circulating conveyor belt 51.

[0047] Since diffusion welding needs to be carried out in a vacuum environment or a protective atmosphere, in order to avoid affecting the internal environment of the tunnel furnace 31, the feed isolation chamber 21 and the discharge isolation chamber 41 are both connected to a vacuum pump or a gas supply device (not shown in the figure). The vacuum pump is used to draw a vacuum, and the gas supply device is used to introduce a protective atmosphere (such as nitrogen or other inert gases).

[0048] For ease of understanding, this embodiment takes diffusion welding in a nitrogen atmosphere as an example to explain the feeding and discharging actions of the material tray. The gas supply device continuously supplies nitrogen into the feeding isolation chamber and the discharging isolation chamber to ensure that the protective atmosphere environment in the tunnel furnace and cooling tunnel is not affected, thus ensuring the quality of diffusion welding.

[0049] The feeding operation of the feed transition chamber 21 is as follows: Action 1: The central sealing door 6 closes, and the sealing doors 6 at the inlet and outlet open, pushing the material tray in the second feed chamber 212 into the tunnel furnace. Simultaneously, the circulating conveyor belt 51 sends the material tray 8 into the first feed chamber 211. Action 2: The sealing doors 6 at the inlet and outlet close, and after waiting for nitrogen to be introduced for a period of time, the central sealing door 6 opens, pushing the material tray 8 sent into the first feed chamber 211 in Action 1 into the second feed chamber 212. Then, the central sealing door 6 closes, and Action 1 is repeated. By repeating Action 1 and Action 2, automatic feeding of the material tray 8 is achieved. Since the feed transition chamber 21 is divided into two chambers by the sealing door 6, when the central sealing door 6 is closed, while the second feed chamber 212 is feeding material into the tunnel furnace, the circulating conveyor belt 51 can simultaneously feed material into the first feed chamber 211, thereby improving conveying efficiency while ensuring that the internal processing environment is not affected.

[0050] The discharge action of the discharge transition chamber 41 is as follows: First, the middle sealing door 6 is closed and the outlet sealing door 6 is opened. The material transfer assembly pulls the material tray 8 in the second discharge chamber 412 onto the circulating conveyor belt 51. Then, the outlet sealing door 6 is closed. After waiting for nitrogen to be introduced for a period of time, the middle sealing door 6 is opened, pushing the material tray in the first discharge chamber 411 into the second discharge chamber 412.

[0051] By setting up the feed transition chamber 21 and the discharge transition chamber 41, the transition between the external atmospheric environment and the vacuum environment is realized, ensuring that the vacuum environment inside the tunnel furnace 31 and the cooling tunnel 32 is not affected, thereby improving the reliability of diffusion welding and ensuring product quality.

[0052] It is understandable that the feeding and discharging devices can be assembled from several tracks, with gaps between them, so that the sealing door 6 can be sealed to avoid interference.

[0053] Preferably, a transfer channel 313 is connected to one end of the tunnel furnace 31 near the feed transition chamber 21. The transfer channel 313 is used to communicate with the outlet of the feed transition chamber 21 to prevent the sealing door 6 set at the outlet of the feed transition chamber 21 from interfering with the tunnel furnace 31.

[0054] Preferably, a water-cooling coil 7 is provided on the outer wall of the discharge transition chamber 41. The water-cooling coil 7 is used to cool the outer shell temperature of the discharge transition chamber 41 and reduce the internal temperature, further ensuring that the workpiece and the tray 8 are completely cooled, so as to ensure the safety of the staff when picking up the material.

[0055] It is worth mentioning that the sealing door 6 in this embodiment is quite common in this technical field. Its specific structure can be found in patent number CN211287191U, and will not be described in detail here.

[0056] Please refer to Figure 3 and Figure 4 Heating rods 311 are evenly distributed on the inner wall of the tunnel furnace 31. The heating of the heating rods 311 provides the high-temperature environment required for diffusion welding.

[0057] Please refer to Figures 1 to 4 The outer wall of the tunnel furnace 31 is equipped with a water-cooling coil 7, which is used to cool the outer shell of the tunnel furnace 31 to prevent the temperature from getting too high and to ensure the safety of the equipment and personnel.

[0058] Please refer to Figures 1 to 4 The pressurizing mechanism 312 includes two sets of pressurizing components. Each set of pressurizing components includes a pressurizing drive 3121 and a pressure plate 3122. The pressurizing drive 3121 is located at the top of the tunnel furnace 31, and the pressure plate 3122 is located inside the tunnel furnace 31. The output end of the pressurizing drive 3121 is connected to the pressure plate 3122. When the material tray 8 reaches below the pressure plate 3122, the pressurizing drive 3121 drives the pressure plate 3122 to apply pressure to the workpiece, so that the workpiece completes diffusion welding.

[0059] It should be noted that multiple pressure components can be set up, each including a pressure drive 3121 and a pressure plate 3122, so that multiple workpieces can be pressured at the same time. The specific number can be flexibly adjusted according to actual needs.

[0060] Furthermore, the pressurizing mechanism 312 also includes a pressure-bearing bracket 3123. The pressure-bearing bracket 3123 includes a pressure-bearing plate 3124 disposed above the tunnel furnace 31. The pressurizing drive component 3121 is installed at the bottom of the pressure-bearing plate 3124. The pressure-bearing plate 3124 is used to withstand the tension when the pressurizing component is working, providing a stable and reliable mounting carrier for the pressurizing component. The two sides of the pressure-bearing bracket 3123 are fixedly installed on the frame 1 on both sides of the tunnel furnace 31 to ensure stable installation.

[0061] Preferably, the pressure-bearing bracket 3123 in this embodiment is a channel steel bracket, which is installed around the outside of the tunnel furnace 31. Alternatively, it can be in the form of columns, that is, several columns are set on both sides of the tunnel furnace 31, and the pressure plate 3124 is installed on the top of the columns to achieve fixation.

[0062] In this embodiment, the cooling tunnel 32 is a double-layer structure consisting of an outer shell and an inner liner (not specifically shown in the figure). The gap between the outer shell and the inner liner is filled with cooling water. The cooling water can reduce the temperature inside the cooling tunnel 32, ensuring the cooling effect. At the same time, it can also reduce the temperature of the outer shell of the cooling tunnel 32, ensuring the safety of the staff.

[0063] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0064] Furthermore, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0065] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The various embodiments can be combined as needed, and the same or similar parts can be referred to each other.

[0066] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A continuous diffusion bonding apparatus, characterized by comprising: include: The feeding unit includes a feeding conveyor. The discharge unit includes a discharge conveying device; A processing unit is located between the feeding unit and the discharging unit. The processing unit includes a tunnel furnace and a cooling tunnel connected to each other. The tunnel furnace is equipped with a pressurizing mechanism, and the interior of the tunnel furnace and the cooling tunnel is equipped with a material tray conveying device. A circulating conveying unit is disposed between the feeding unit and the discharging unit, and the circulating conveying unit includes a circulating conveyor belt; The two ends of the material tray conveying device are connected to the infeed conveying device and the outfeed conveying device, respectively, and the two ends of the circulating conveyor belt are connected to the infeed conveying device and the outfeed conveying device, respectively, thereby connecting the infeed unit, processing unit, outfeed unit and circulating conveying unit end to end to form a continuous circulating processing line.

2. The continuous diffusion bonding apparatus of claim 1, wherein The feeding unit includes a feeding transition chamber, and the feeding conveying device is located inside the feeding transition chamber; The inlet of the feeding transition chamber is located at one end of the circulating conveyor belt, and the outlet of the feeding transition chamber is connected to the tunnel furnace. The feed transfer chamber is equipped with a sealable door that can be opened and closed at both the inlet and outlet.

3. The continuous diffusion bonding apparatus of claim 2, wherein The sealing door is provided in the middle of the feeding transition chamber to divide the feeding transition chamber into a first feeding chamber and a second feeding chamber.

4. The continuous diffusion bonding apparatus of claim 1, wherein Heating rods are evenly distributed on the inner wall of the tunnel furnace.

5. The continuous diffusion bonding apparatus of claim 1 wherein, The outer wall of the tunnel furnace is equipped with water-cooled coils.

6. The continuous diffusion bonding apparatus of claim 1, wherein The pressurizing mechanism includes at least one set of pressurizing components. Each pressurizing component includes a pressurizing drive and a pressure plate. The pressurizing drive is located at the top of the tunnel furnace, and the pressure plate is located inside the tunnel furnace. The output end of the pressurizing drive is connected to the pressure plate.

7. The continuous diffusion bonding apparatus of claim 6, wherein The pressurizing mechanism also includes a pressure-bearing bracket, which includes a pressure-bearing plate located above the tunnel furnace. The pressurizing drive component is installed at the bottom of the pressure-bearing plate.

8. The continuous diffusion bonding apparatus of claim 1, wherein The cooling tunnel is a double-layered structure consisting of an outer shell and an inner liner, with cooling water filling the gap between the outer shell and the inner liner.

9. The continuous diffusion bonding apparatus of claim 1, wherein The discharge unit includes a discharge transition chamber, and the discharge conveying device is located inside the discharge transition chamber; The inlet of the discharge transition chamber is connected to the cooling tunnel, and the outlet of the discharge transition chamber is located at one end of the circulating conveyor belt.

10. The continuous diffusion bonding apparatus of claim 9, wherein The discharge transition chamber is provided with two sealing doors. One of the sealing doors is located in the middle of the discharge transition chamber to divide the discharge transition chamber into a first discharge chamber and a second discharge chamber. The other sealing door is located at the outlet of the discharge transition chamber. The outer wall of the discharge transition chamber is equipped with water-cooled coils.

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