Brazing furnace vacuum feeding processing system and processing method

Abstract

This invention discloses a vacuum loading system and method for brazing furnaces. By incorporating a protective gas injection unit, protective gas is injected around the workpiece before it enters the brazing furnace along with the hollow rotating shaft, and during the initial stage of entry. This prevents direct contact between the workpiece and air, effectively avoiding oxidation. Simultaneously, the invention connects a vacuum pump unit to the inside of the brazing furnace via the inner cavity of a vacuum rotating fixture. The vacuum pump unit evacuates the furnace to a predetermined vacuum level, and the hollow rotating shaft drives the workpiece to rotate at a predetermined speed within the furnace, ensuring more uniform heating. Furthermore, by incorporating a linearly movable connector assembly, coupled with the rapid and accurate movement of the mobile platform, this invention enables cable connection for data transmission even when wireless networks are unavailable. This makes the entire data transmission process controllable and prevents data leakage.

Description

Technical Field

[0001] This invention belongs to the technical field of brazing furnace feeding and processing, specifically relating to a brazing furnace vacuum feeding and processing system and method. Background Technology

[0002] The existing brazing furnace loading fixture consists of a loading trolley corresponding to one brazing furnace. Each loading trolley loads a workpiece, and after brazing, the workpiece needs to be unloaded from the furnace via the trolley. Furthermore, after unloading, the workpiece needs to be naturally cooled to below 100°C before being removed from the trolley. It takes more than 15 hours for the workpiece to cool from 1180°C-1200°C to 100°C, preventing the entire furnace from producing another batch. As a result, each furnace can only produce one batch of products per 24 hours, severely impacting production efficiency. Simultaneously, during these 15 hours, the furnace temperature drops from 1180°C-1200°C to around 300°C, leading to high energy consumption and low production efficiency. Furthermore, the existing brazing furnace loading fixtures cannot provide oxygen protection for the workpieces during the loading, workpiece entry, workpiece exit, and unloading processes. This results in the high-temperature workpieces coming into direct contact with oxygen in the external environment. For workpieces that are prone to oxidation, this can easily cause rapid oxidation and affect the quality of the workpieces.

[0003] Therefore, in view of the above-mentioned problems of existing brazing furnace feeding fixtures, the present invention discloses a brazing furnace vacuum feeding processing system and processing method. Summary of the Invention

[0004] This invention discloses a brazing furnace vacuum loading and processing system and method, which can realize rapid workpiece loading, brazing processing and unloading operations in a large area. At the same time, it can protect the workpiece before entering the brazing furnace, during entering the brazing furnace and during exiting the brazing furnace. Meanwhile, it can maintain the vacuum degree inside the brazing furnace during the heating process and drive the workpiece to rotate at a uniform speed, so that the workpiece is heated more evenly.

[0005] This invention is achieved through the following technical solution: A brazing furnace vacuum loading system includes several brazing furnaces arranged in a brazing area. Several mobile brazing loading devices are installed on the brazing area. Cable terminals are located on one side of the furnace door, on the ground of the brazing area. A pair of connectors for mating with the cable terminals is slidably installed on one side of each mobile brazing loading device. The cable terminals are connected to a central control terminal. Each mobile brazing loading device includes a moving platform. A vacuum pump assembly and a vacuum rotary clamp are installed on the moving platform. The vacuum pump assembly is rotatably sealed to the first end of the vacuum rotary clamp via a dynamic sealing assembly. A temperature detection device extending to the second end is inserted inside the vacuum rotary clamp. A dynamic balance fork arm assembly is detachably installed on the end of the moving platform near the brazing furnace. The dynamic sealing assembly includes at least one protective gas injection section extending to the second end of the vacuum rotary clamp and connected to the external environment of the second end of the vacuum rotary clamp. A guide path and a QR code are provided on the ground of the brazing area. A guide device for identifying the guide path and the QR code is provided on the moving platform.

[0006] The workpiece is fixed on the brazing mobile loading device, which then autonomously navigates it to an available brazing furnace. After the connector assembly is connected to the cable terminal, the brazing mobile loading device is controlled via a central control terminal. The device moves towards the furnace door, injecting protective gas around the workpiece before and immediately upon entry. After the furnace door closes, a vacuum pump evacuates the furnace to a predetermined vacuum level, while a vacuum rotary clamp rotates the workpiece at a uniform speed to ensure even heating and brazing quality. Once the workpiece is processed, the furnace door opens. Before removing the workpiece from the furnace, protective gas is injected around it again to prevent direct contact with air. The workpiece is then removed from the furnace via a moving platform.

[0007] To better realize the present invention, the dynamic sealing assembly further includes an outer cylinder and an inner cylinder. The outer cylinder has a connection hole on its wall that connects to the suction end of the vacuum pump assembly. The inner cylinder is rotatably disposed inside the outer cylinder. The inner cylinder has an array of holes on its wall that communicate with the connection hole. A protective gas injection part is provided at one end of the inner cylinder near the vacuum rotary clamp. An air inlet connector is provided on the outer cylinder wall that connects to the air inlet end of the protective gas injection part. The air outlet end of the protective gas injection part extends to the second end of the vacuum rotary clamp.

[0008] To better realize the present invention, the end of the inner cylinder away from the vacuum pump group is further connected to the vacuum rotary clamp via an adapter flange. A sealing gas chamber is provided outside the adapter flange, and a connecting bend is provided inside the inner cylinder. The air inlet end of the connecting bend is connected to the air inlet connector, and the air outlet end of the connecting bend is connected to the sealing gas chamber. The sealing gas chamber is connected to the inside of the vacuum rotary clamp.

[0009] To better realize the present invention, the vacuum rotary fixture is further provided with a protective gas delivery pipe inside, and the inlet end of the protective gas delivery pipe is connected to the sealing gas chamber; a protective gas outlet is provided on the side wall of the end of the vacuum rotary fixture away from the vacuum pump group, and the outlet end of the protective gas delivery pipe is connected to the protective gas outlet.

[0010] To better realize the present invention, the mating connector assembly further includes a sliding platform, an alignment detection device, and a mating connector. The sliding platform is linearly slidably arranged on the side of the moving platform, the mating connector is arranged on the sliding platform, and the alignment detection device is arranged on one side of the mating connector.

[0011] To better realize the present invention, the sliding platform further includes a linear drive assembly, a first platform, and a second platform. The first platform is linearly slidably mounted on the side of the mobile platform. A linear drive assembly for driving the first platform to slide is provided between the first platform and the mobile platform. A second platform is provided on one side of the first platform. A pushing device is provided between the first platform and the second platform. An alignment detection device and a mating connector are provided on one side of the second platform.

[0012] To better realize the present invention, the vacuum rotary fixture further includes a hollow rotating shaft, a rotation drive assembly, and an electric slip ring. The first end of the hollow rotating shaft is connected to the vacuum pump assembly through a dynamic sealing assembly, and the second end of the hollow rotating shaft is provided with a connecting flange. A rotation drive assembly for driving the hollow rotating shaft to rotate is provided between the outside of the hollow rotating shaft and the moving platform. An electric slip ring is sleeved on the outside of the hollow rotating shaft, and the electric slip ring is connected to a temperature detection device.

[0013] To better realize the present invention, the dynamic balancing fork arm assembly further includes a balancing support arm, a driving hydraulic cylinder, and a floating fork arm. The balancing support arm is fixedly installed at one end of the moving platform near the brazing furnace. The bottom of the balancing support arm is connected to the floating fork arm through two sets of rotatably hinged connecting rods. The balancing support arm, the two sets of connecting rods, and the floating fork arm form a parallelogram structure. One end of the driving hydraulic cylinder is hinged to the moving platform, and the push rod end of the driving hydraulic cylinder is hinged to one end of the floating fork arm.

[0014] To better realize the present invention, a feeding station is further provided on the brazing site, and a visual recognition device for identifying the type of workpiece is provided on the feeding station. The visual recognition device is connected to the central control terminal.

[0015] A brazing furnace vacuum feeding processing method, implemented using a brazing furnace vacuum feeding processing device, includes the following steps: Step 1: Identify the workpiece type and classify the workpiece into Type 1 workpiece and Type 2 workpiece. Type 1 workpiece docks with the vacuum rotary fixture, while Type 2 workpiece docks with both the vacuum rotary fixture and the dynamic balancing fork arm assembly. Based on the determined workpiece type, the central control terminal controls the brazing moving loading device equipped with the corresponding fixture to move to the loading station to load the workpiece. Step 2: The brazing mobile loading device autonomously navigates to the first position in front of the idle brazing furnace and connects the connector group with the cable terminals on the ground at the first position. Step 3: The brazing moving feeding device moves toward the furnace door, and when it detects that the distance between the workpiece and the furnace door is within the first spacing threshold, the central control terminal controls the protective gas injection unit to start, and delivers protective gas to the area around the workpiece through the protective gas injection unit. Step 4: The furnace door is opened, and the brazing moving feeding device continues to move toward the furnace door until the workpiece enters the brazing furnace. Then the furnace door is closed, and the protective gas injection unit stops supplying protective gas. Step 5: The central control terminal controls the vacuum rotary fixture to rotate the workpiece at a uniform speed, and during the rotation, it draws in the gas inside the brazing furnace, ensuring that the vacuum degree inside the brazing furnace is ≤6.7×10⁻⁶. -3 Pa, to heat the workpiece uniformly from all directions; Step 6: Monitor the internal temperature of the brazing furnace in real time through the temperature detection device and transmit the temperature data to the central control terminal to ensure that the workpiece is heated in the brazing furnace for the predetermined time within the preset temperature range. Step 7: The furnace door is opened, and the brazing mobile feeding device moves away from the furnace door. Before the workpiece leaves the brazing furnace, the central control terminal controls the protective gas injection unit to start, and delivers protective gas to the area around the workpiece through the protective gas injection unit until the workpiece is completely removed from the brazing furnace. Step 8: Disconnect the connector assembly from the cable terminals on the ground, and allow the brazing mobile loading device to autonomously navigate to an available unloading station for unloading.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects: This invention incorporates a protective gas injection unit. Before the workpiece enters the brazing furnace along with the hollow rotating shaft, and initially during this initial entry, a protective gas is injected around the workpiece, preventing direct contact with air and effectively avoiding oxidation. Simultaneously, the invention connects a vacuum pump unit to the brazing furnace via the inner cavity of a vacuum rotating fixture. The vacuum pump unit evacuates the furnace to a predetermined vacuum level, and the hollow rotating shaft drives the workpiece to rotate at a predetermined speed within the furnace, ensuring more uniform heating. Furthermore, the invention features a linearly movable connector assembly, coupled with the rapid and accurate movement of the mobile platform, enabling cable connection for data transmission even when wireless networks are unavailable. This makes the entire data transmission process controllable and prevents data leakage. Attached Figure Description

[0017] Figure 1 A schematic diagram of the vacuum feeding system for a brazing furnace; Figure 2 A schematic diagram of the brazing mobile feeding device; Figure 3 This is a schematic diagram of the structure of a vacuum rotary fixture; Figure 4 This is a schematic diagram of the dynamic sealing assembly. Figure 5 This is a schematic diagram of the connector structure; Figure 6 This is a schematic diagram of the structure of the balance arm assembly.

[0018] The components are as follows: 1-Vacuum pump assembly; 2-Vacuum rotary clamp; 3-Dynamic sealing assembly; 4-Balanced insert arm assembly; 5-Matching connector assembly; 6-Cooling device; 21-Hollow rotating shaft; 22-Rotation drive assembly; 23-Electric slip ring; 31-Outer cylinder; 32-Inner cylinder; 33-Transfer flange; 34-Sealing gas chamber; 35-Connecting bend; 36-Protective gas delivery pipe; 41-Balanced support arm; 42-Drive hydraulic cylinder; 43-Floating fork arm; 51-Sliding platform; 52-Alignment detection device; 53-Matching connector; 100-Brazing moving loading device; 200-Cable terminal; 300-Brazing furnace. Detailed Implementation

[0019] Example 1: This embodiment describes a vacuum feeding system for a brazing furnace, such as... Figure 1 and Figure 2As shown, the brazing facility includes several brazing furnaces 300 arranged in a brazing area. Several mobile brazing loading devices 100 are installed on the brazing area. Cable terminals 200 are installed on one side of the furnace door of each brazing furnace 300, located on the ground of the brazing area. A plug-in assembly 5 for mating with the cable terminals 200 is slidably installed on one side of each mobile brazing loading device 100. The cable terminals 200 are connected to a central control terminal. Each mobile brazing loading device 100 includes a moving platform, on which a vacuum pump assembly 1 and a vacuum rotary clamp 2 are installed. 1. A dynamic sealing assembly 3 is rotatably sealed to the first end of a vacuum rotary clamp 2. A temperature detection device extending to the second end is inserted inside the vacuum rotary clamp 2. A dynamic balance fork arm assembly 4 is detachably installed at the end of the moving platform near the brazing furnace. The dynamic sealing assembly 3 includes at least one protective gas injection section extending to the second end of the vacuum rotary clamp 2 and connected to the external environment of the second end of the vacuum rotary clamp 2. A guide path and a QR code are provided on the ground of the brazing site, and a guide device for recognizing the guide path and the QR code is provided on the moving platform. A loading station is provided on the brazing site, and a visual recognition device for identifying the type of workpiece is provided on the loading station. The visual recognition device is connected to the central control terminal.

[0020] The mobile platform is equipped with a controller, which has a built-in navigation program. This program controls the mobile platform to move and position itself along a guide path and a QR code on the ground when the connector group 5 is disconnected from the cable terminal 200. Only after the mobile platform has moved into position and connected the connector group 5 to the cable terminal 200 does the central control terminal begin exchanging and transmitting control data.

[0021] Furthermore, a cooling device 6 is installed on the mobile platform. The cooling device 6 can be either an air-cooled device or a liquid-cooled device. The cooling device 6 cools the vacuum pump group 1 to prevent the positive air pump group 1 from overheating and affecting its normal operation. The two furnace doors of the brazing furnace 300, which can be opened and closed, are provided with notches corresponding to the outer diameter of the vacuum rotary clamp 2. When the left and right furnace doors are closed, the notches fit tightly with the outer diameter of the vacuum rotary clamp 2 to prevent external gas from rushing into the interior of the brazing furnace 300 and affecting the vacuum level.

[0022] A method for vacuum feeding in a brazing furnace, based on a vacuum feeding processing device for a brazing furnace, includes the following steps: Step 1: Identify the workpiece type using a visual recognition device and classify the workpiece into Type 1 workpiece and Type 2 workpiece. Type 1 workpiece docks with vacuum rotary fixture 2, while Type 2 workpiece docks with both vacuum rotary fixture 2 and dynamic balancing fork arm assembly 4. Based on the determined workpiece type, the central control terminal controls the brazing mobile loading device 100, equipped with the corresponding fixture, to move to the loading station to load the workpiece. Step 2: The brazing mobile loading device 100 autonomously navigates to the first position in front of the idle brazing furnace, and connects the connector group 5 with the cable terminal 200 on the ground at the first position. Step 3: The brazing moving feeding device 100 moves toward the furnace door, and when it is detected that the distance between the workpiece and the furnace door is within the first spacing threshold, the central control terminal controls the protective gas injection unit to start, and delivers protective gas to the area around the workpiece through the protective gas injection unit. Step 4: The furnace door is opened, and the brazing moving feeding device 100 continues to move toward the furnace door until the workpiece enters the brazing furnace 300. Then the furnace door is closed, and the protective gas injection unit stops supplying protective gas. Step 5: The central control terminal controls the vacuum rotary fixture 2 to rotate the workpiece at a constant speed of 3 rad / min, and during the rotation, it draws in the gas inside the brazing furnace, ensuring that the vacuum degree inside the brazing furnace is ≤6.7×10⁻⁶. -3 Pa, to heat the workpiece uniformly from all directions; Step 6: Monitor the internal temperature of the brazing furnace 300 in real time through the temperature detection device, and transmit the temperature data to the central control terminal to ensure that the workpiece is heated in the brazing furnace for the predetermined time within the preset temperature range. Step 7: The furnace door is opened, and the brazing mobile feeding device 100 moves away from the furnace door. Before the workpiece leaves the brazing furnace 300, the central control terminal controls the protective gas injection unit to start, and delivers protective gas to the workpiece until the workpiece is completely removed from the brazing furnace 300. Step 8: Disconnect the connector group 5 from the cable terminal 200 on the ground, and allow the brazing mobile loading device 100 to autonomously navigate to an empty unloading station for unloading.

[0023] Example 2: This embodiment discloses a vacuum feeding processing system for a brazing furnace, which is an improvement on Embodiment 1, such as... Figure 2 and Figure 4 As shown, the dynamic sealing assembly 3 includes an outer cylinder 31 and an inner cylinder 32. The outer cylinder 31 has a connection hole on its wall that connects to the suction end of the vacuum pump assembly 1. The inner cylinder 32 is rotatably disposed inside the outer cylinder 31. The inner cylinder 32 has an array of holes on its wall that communicate with the connection hole. The inner cylinder 32 has a protective gas injection section at one end near the vacuum rotary clamp 2. The outer cylinder 31 has an air inlet connector that connects to the air inlet end of the protective gas injection section. The air outlet end of the protective gas injection section extends to the second end of the vacuum rotary clamp 2.

[0024] The suction end of the vacuum pump unit 1 is connected to the connecting hole via a connecting pipe. The outer cylinder 31 is fixed and does not rotate, while the inner cylinder 32 is rotatably installed inside the outer cylinder 31. The inner cylinder 32 rotates synchronously with the vacuum rotary fixture 2. During the vacuuming process, the inner cavity of the vacuum rotary fixture 2 is connected to the vacuum pump unit 1 through an array of holes. After the end of the vacuum rotary fixture 2 that holds the workpiece extends into the brazing furnace 300, the vacuum pump unit 1 is connected to the internal environment of the brazing furnace 300. The gas inlet connector is connected to the protective gas source through a nylon tube. Protective gases such as argon enter the area between the outer cylinder 31 and the inner cylinder 32 through the gas inlet connector, and further enter the protective gas injection section. Then, the protective gas is delivered to the outside of the end of the vacuum rotary fixture 2 that holds the workpiece, so that the protective gas can form a protective layer around the workpiece. A sealing ring and a copper sleeve are provided between the outer wall of the inner cylinder 32 and the inner wall of the outer cylinder 31. Lubricating oil injection holes are provided on the cylinder wall of the outer cylinder 31 at the positions corresponding to the sealing ring and the copper sleeve. The sealing between the inner cylinder 32 and the outer cylinder 31 is ensured by setting an O-ring seal. At the same time, the smooth relative rotation between the inner cylinder 32 and the outer cylinder 31 is ensured by setting a copper sleeve. Lubricating oil can be injected into the sealing ring and the copper sleeve through the lubrication oil injection hole to prevent the inner cylinder 32 and the outer cylinder 31 from getting stuck during rotation.

[0025] Furthermore, the end of the inner cylinder 32 away from the vacuum pump assembly 1 is connected to the vacuum rotary clamp 2 via an adapter flange 33. A sealing gas chamber 34 is provided on the outside of the adapter flange 33, and a connecting bend 35 is provided inside the inner cylinder 32. The air inlet end of the connecting bend 35 is connected to the air inlet connector, and the air outlet end of the connecting bend 35 is connected to the sealing gas chamber 34. The sealing gas chamber 34 is connected to the inside of the vacuum rotary clamp 2.

[0026] One end of the adapter flange 33 is connected to the end of the inner cylinder 32 away from the vacuum pump group 1 via connecting bolts, and the other end of the adapter flange 33 is sealed by welding or clamping to the inner cavity of the vacuum rotary clamp 2. The end of the inner cylinder 32 away from the vacuum pump group 1 is provided with a two-way flow channel. The first outlet of the two-way flow channel is provided with a movable plug, the second outlet of the two-way flow channel is connected to the sealing gas chamber 34, and the inlet of the two-way flow channel is connected to the outlet of the connecting bend 35.

[0027] An annular sealing chamber 34 is provided on the outside of the adapter flange 33. The sealing chamber 34 has an inlet and an outlet. The inlet of the sealing chamber 34 is connected to the outlet end of the connecting elbow 35, and the outlet of the sealing chamber 34 extends to the outside of the end of the vacuum rotary clamp 2 that fixes the workpiece. Protective gas enters the connecting elbow 35 through the inlet connector. Before the workpiece enters the brazing furnace 300, and during the process when the workpiece has just entered the brazing furnace 300, the movable plug blocks the first outlet end of the two-way flow channel. At this time, the protective gas delivered by the connecting elbow 35 can only enter the sealing chamber 34 through the second outlet end of the two-way flow channel and then be delivered to the outside of the workpiece to protect it. When the vacuum level inside the brazing furnace 300 reaches the standard, the movable plug opens, allowing the protective gas to flow back to the protective gas source through the return pipe connected to the first outlet end of the two-way flow channel.

[0028] Furthermore, the vacuum rotary fixture 2 is internally equipped with a protective gas delivery pipe 36, the inlet of which is connected to the sealing gas chamber 34; a protective gas outlet is provided on the side wall of the end of the vacuum rotary fixture 2 away from the vacuum pump assembly 1, and the outlet of the protective gas delivery pipe 36 is connected to the protective gas outlet. The protective gas filling the sealing gas chamber 34 is delivered to the outside of the end of the vacuum rotary fixture 2 where the workpiece is fixed through the protective gas delivery pipe 36, thus protecting the workpiece.

[0029] The rest of this embodiment is the same as that of Embodiment 1, so it will not be described again.

[0030] Example 3: This embodiment discloses a vacuum feeding processing system for a brazing furnace, which is an optimization based on Embodiment 1 or 2, such as... Figure 2 and Figure 5 As shown, the connector assembly 5 includes a sliding platform 51, an alignment detection device 52, and a connector 53. The sliding platform 51 is linearly slidably arranged on the side of the moving platform, and the connector 53 is arranged on the sliding platform 51. The alignment detection device 52 is arranged on one side of the connector 53.

[0031] Since wireless networks such as Wi-Fi and Bluetooth are not permitted for data transmission within the brazing area, and the cable terminals on the ground are in relatively fixed positions, a sliding platform 51 is linearly slidable on the side of the mobile platform to enable data transmission. The sliding platform 51 is positioned at the same height as the cable terminals on the ground. Through the linear sliding of the sliding platform 51, combined with the alignment detection device 52, the mating plug 53 moves with the sliding platform 51 to a position aligned with the cable terminal. Then, the mating plug 53 extends towards the cable terminal to achieve docking, enabling data exchange and transmission with external monitoring equipment.

[0032] Furthermore, the sliding platform 51 includes a linear drive assembly, a first platform, and a second platform. The first platform is linearly slidably mounted on the side of the mobile platform, and a linear drive assembly for driving the first platform to slide is provided between the first platform and the mobile platform. A second platform is provided on one side of the first platform, and a pushing device is provided between the first platform and the second platform. An alignment detection device 52 and a mating connector 53 are provided on one side of the second platform.

[0033] The linear drive assembly employs any one of the following: a linear cylinder, a rack and pinion linear transmission mechanism, or a screw and nut linear transmission mechanism. The linear drive assembly drives the sliding platform 51 to slide linearly along the guide groove on the side of the moving platform. Combined with the detection of the alignment detection device 52, this aligns the connector 53 with the cable terminal on the ground. Then, the pushing device pushes the connector 53 on the second platform toward the cable terminal, allowing the connector 53 to connect with the cable terminal. Several sets of elastic buffers are installed between the first and second platforms. During the connection process between the connector 53 and the cable terminal, the elastic compression of these buffers cushions the connection, preventing damage to the connector 53.

[0034] Furthermore, a mating guide is provided on one side of the mating connector 53. The mating guide is provided with a guide hole corresponding to the cable terminal fixing seat. Before the mating connector 53 is mated with the cable terminal, the mating guide is first inserted into the guide hole and slidably guided so that the mating connector 53 can smoothly connect with the cable terminal.

[0035] The rest of this embodiment is the same as that of embodiment 1 or 2, so it will not be described again.

[0036] Example 4: This embodiment discloses a vacuum feeding processing system for a brazing furnace, which is optimized based on any one of embodiments 1-3, such as... Figure 2 and Figure 3 As shown, the vacuum rotary fixture 2 includes a hollow rotating shaft 21, a rotation drive assembly 22, and an electric slip ring 23. The first end of the hollow rotating shaft 21 is connected to the vacuum pump assembly 1 through a dynamic sealing assembly 3, and the second end of the hollow rotating shaft 21 is provided with a connecting flange. A rotation drive assembly 22 is provided between the outside of the hollow rotating shaft 21 and the moving platform to drive the hollow rotating shaft 21 to rotate. An electric slip ring 23 is sleeved on the outside of the hollow rotating shaft 21, and the electric slip ring 23 is connected to a temperature detection device.

[0037] The rotation drive assembly 22 includes a drive motor, a reducer, a drive gear, and a driven gear. The drive motor is connected to the reducer, and the drive gear is mounted on the output shaft of the reducer. The driven gear is mounted on the outside of the hollow shaft 21. The drive motor drives the output shaft of the reducer to rotate, which in turn drives the drive gear to rotate, ultimately causing the hollow shaft 22 to rotate at a constant speed of 3rd / min. A connecting flange for connecting workpieces is provided on the end of the hollow shaft 21 closest to the brazing furnace 300. The connecting flange has several mating holes. Bolts are used to connect the workpiece to the connecting flange to fix it in place. A temperature detection device, i.e., a thermocouple, is inserted into the cavity inside the hollow shaft 22 and rotates with it. One end of the thermocouple slides in contact with an electric slip ring 23, transmitting the detected temperature signal to the outside through the slip ring 23.

[0038] The rest of this embodiment is the same as any one of embodiments 1-3, so it will not be described again.

[0039] Example 5: This embodiment discloses a vacuum feeding processing system for a brazing furnace, which is optimized based on any one of embodiments 1-4, such as... Figure 2 and Figure 6 As shown, the dynamic balancing fork arm assembly 4 includes a balancing support arm 41, a driving hydraulic cylinder 42, and a floating fork arm 43. The balancing support arm 41 is fixedly installed at one end of the moving platform near the brazing furnace 300. The bottom of the balancing support arm 41 is connected to the floating fork arm 43 through two sets of rotatably hinged connecting rods. The balancing support arm 41, the two sets of connecting rods, and the floating fork arm 43 form a parallelogram structure. One end of the driving hydraulic cylinder 42 is hinged to the moving platform, and the push rod end of the driving hydraulic cylinder 42 is hinged to one end of the floating fork arm 43.

[0040] By extending and retracting the push rod of the hydraulic cylinder 42, the balance arm 41, the two sets of connecting rods, and the floating fork arm 43 are driven to form a parallelogram structure deformation, thereby enabling the floating fork arm 43 to float and extend. The floating fork arm 43 can support the bottom of the workpiece and adjust the height and front-to-back distance of the workpiece, ensuring that the workpiece can be stably forked into the brazing furnace 300.

[0041] The rest of this embodiment is the same as any one of embodiments 1-4, so it will not be described again.

[0042] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A brazing furnace vacuum feeding processing system, comprising a plurality of brazing furnaces (300) arranged in a brazing area, characterized in that, The brazing site is equipped with several mobile brazing loading devices (100). A cable terminal (200) is located on one side of the brazing furnace door (300) on the ground of the brazing site. A plug-in assembly (5) for connecting with the cable terminal (200) is slidably installed on one side of the mobile brazing loading device (100). The cable terminal (200) is connected to a central control terminal. The mobile brazing loading device (100) includes a mobile platform, on which a vacuum pump assembly (1) and a vacuum rotary clamp (2) are installed. The vacuum pump assembly (1) is connected via a dynamic sealing assembly (3). The first end of the vacuum rotary clamp (2) is rotatably sealed and connected to the vacuum rotary clamp (2). A temperature detection device extending to the second end is inserted inside the vacuum rotary clamp (2). A dynamic balance fork arm assembly (4) is detachably provided at one end of the mobile platform near the brazing furnace (300). The dynamic sealing assembly (3) includes at least one protective gas injection part extending to the second end of the vacuum rotary clamp (2) and connected to the external environment of the second end of the vacuum rotary clamp (2). A guide path and a QR code are provided on the ground of the brazing site. A guide device for identifying the guide path and the QR code is provided on the mobile platform.

2. The brazing furnace vacuum feeding system according to claim 1, characterized in that, The dynamic sealing assembly (3) includes an outer cylinder (31) and an inner cylinder (32). The outer cylinder (31) has a connection hole on its wall that connects to the suction end of the vacuum pump assembly (1). The inner cylinder (32) is rotatably arranged inside the outer cylinder (31). The inner cylinder (32) has an array of holes on its wall that communicate with the connection hole. The inner cylinder (32) has a protective gas injection part at one end near the vacuum rotary clamp (2). The outer cylinder (31) has an air inlet connector that connects to the air inlet end of the protective gas injection part. The air outlet end of the protective gas injection part extends to the second end of the vacuum rotary clamp (2).

3. The brazing furnace vacuum feeding system according to claim 2, characterized in that, The end of the inner cylinder (32) away from the vacuum pump group (1) is connected to the vacuum rotary clamp (2) through the adapter flange (33). A sealing gas chamber (34) is provided on the outside of the adapter flange (33). A connecting bend (35) is provided inside the inner cylinder (32). The air inlet end of the connecting bend (35) is connected to the air inlet connector. The air outlet end of the connecting bend (35) is connected to the sealing gas chamber (34). The sealing gas chamber (34) is connected to the inside of the vacuum rotary clamp (2).

4. The brazing furnace vacuum feeding system according to claim 3, characterized in that, The vacuum rotary fixture (2) is provided with a protective gas delivery pipe (36) inside, and the inlet of the protective gas delivery pipe (36) is connected to the sealing gas chamber (34); a protective gas outlet is provided on the side wall of the end of the vacuum rotary fixture (2) away from the vacuum pump group (1), and the outlet of the protective gas delivery pipe (36) is connected to the protective gas outlet.

5. A brazing furnace vacuum feeding system according to any one of claims 1-4, characterized in that, The connector assembly (5) includes a sliding platform (51), an alignment detection device (52), and a connector (53). The sliding platform (51) is linearly slidably arranged on the side of the moving platform. The connector (53) is arranged on the sliding platform (51). The alignment detection device (52) is arranged on one side of the connector (53).

6. The brazing furnace vacuum feeding system according to claim 5, characterized in that, The sliding platform (51) includes a linear drive assembly, a first platform, and a second platform. The first platform is linearly slidably mounted on the side of the mobile platform. A linear drive assembly for driving the first platform to slide is provided between the first platform and the mobile platform. A second platform is provided on one side of the first platform. A pushing device is provided between the first platform and the second platform. An alignment detection device (52) and a mating connector (53) are provided on one side of the second platform.

7. A vacuum feeding processing apparatus for a brazing furnace according to any one of claims 1-4, characterized in that, The vacuum rotary fixture (2) includes a hollow rotating shaft (21), a rotation drive assembly (22), and an electric slip ring (23). The first end of the hollow rotating shaft (21) is connected to the vacuum pump assembly (1) through a dynamic sealing assembly (3), and the second end of the hollow rotating shaft (21) is provided with a connecting flange. A rotation drive assembly (22) for driving the hollow rotating shaft (21) to rotate is provided between the outside of the hollow rotating shaft (21) and the moving platform. An electric slip ring (23) is sleeved on the outside of the hollow rotating shaft (21), and the electric slip ring (23) is connected to a temperature detection device.

8. A vacuum feeding processing apparatus for a brazing furnace according to any one of claims 1-4, characterized in that, The dynamic balancing fork arm assembly (4) includes a balancing arm (41), a driving hydraulic cylinder (42), and a floating fork arm (43). The balancing arm (41) is fixedly installed at one end of the moving platform near the brazing furnace (300). The bottom of the balancing arm (41) is connected to the floating fork arm (43) through two sets of rotating hinged connecting rods. The balancing arm (41), the two sets of connecting rods, and the floating fork arm (43) form a parallelogram structure. One end of the driving hydraulic cylinder (42) is hinged to the moving platform, and the push rod end of the driving hydraulic cylinder (42) is hinged to one end of the floating fork arm (43).

9. A vacuum feeding processing apparatus for a brazing furnace according to any one of claims 1-4, characterized in that, The brazing site is equipped with a loading station, which is equipped with a visual recognition device for identifying the type of workpiece. The visual recognition device is connected to the central control terminal.

10. A brazing furnace vacuum feeding processing method, implemented based on the brazing furnace vacuum feeding processing apparatus according to any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Identify the workpiece type and classify the workpiece into Type 1 workpiece and Type 2 workpiece. Type 1 workpiece docks with vacuum rotary fixture (2), and Type 2 workpiece docks with vacuum rotary fixture (2) and dynamic balance fork arm assembly (4) at the same time. The central control terminal controls the brazing mobile loading device (100) equipped with corresponding fixtures to move to the loading station to load the workpiece according to the determined workpiece type. Step 2: The brazing mobile loading device (100) autonomously navigates to the first position in front of the idle brazing furnace (300) and connects the plug assembly (5) with the cable terminal (200) on the ground at the first position; Step 3: The brazing moving feeding device (100) moves toward the furnace door, and when it is detected that the distance between the workpiece and the furnace door is within the first spacing threshold, the central control terminal controls the protective gas injection unit to start, and delivers protective gas to the area around the workpiece through the protective gas injection unit. Step 4: The furnace door is opened, and the brazing moving feeding device (100) continues to move toward the furnace door until the workpiece enters the brazing furnace (300). Then the furnace door is closed, and the protective gas injection unit stops supplying protective gas. Step 5: The central control terminal controls the vacuum rotary fixture (2) to drive the workpiece to rotate at a uniform speed, and during the rotation, it draws in the gas inside the brazing furnace (300) to make the vacuum degree inside the brazing furnace (300) ≤ 6.7 × 10⁻⁶. -3 Pa, to heat the workpiece uniformly from all directions; Step 6: Monitor the internal temperature of the brazing furnace (300) in real time through the temperature detection device, and transmit the temperature data to the central control terminal to ensure that the workpiece is heated in the brazing furnace (300) for a predetermined time within the preset temperature range. Step 7: The furnace door is opened, and the brazing mobile feeding device (100) moves away from the furnace door. Before the workpiece leaves the brazing furnace (300), the main control terminal controls the protective gas injection unit to start, and delivers protective gas to the workpiece until the workpiece is completely removed from the brazing furnace (300). Step 8: Disconnect the connector group (5) from the cable terminal (200) on the ground, and allow the brazing mobile loading device (100) to autonomously navigate to an empty unloading station for unloading.

Images