Vacuum sintering production line

Abstract

The utility model discloses a vacuum sintering production line which comprises a boxing box, a material conveying box and a vacuum sintering furnace. The number of the vacuum sintering furnaces is more than two. The boxing box and the vacuum sintering furnace are arranged side by side; the conveying material box can move to the opposite face of the boxing box and the vacuum sintering furnace and is in butt joint with the boxing box and the vacuum sintering furnace. After the conveying material box and the boxing box are in butt joint, the isolation valve between the conveying material box and the boxing box is opened, the space in the conveying material box is communicated with the space in the boxing box, and the sintering material box can move between the boxing box and the conveying material box. After the conveying material box moves to the opposite side of the vacuum sintering furnace and is in butt joint with the vacuum sintering furnace, an isolation valve between the conveying material box and the vacuum sintering furnace is opened, and the sintering material box containing the pressed blanks in the conveying material box is conveyed into the vacuum sintering furnace.

Description

Technical Field

[0001] This utility model belongs to the field of advanced equipment, and specifically relates to a vacuum sintering production line that can be used for the preparation of high-performance rare earth permanent magnet materials. Background Technology

[0002] The industrial-scale preparation of rare-earth permanent magnet materials generally employs powder metallurgy technology. Rare-earth permanent magnet alloys are formed into 3-5μm powders, oriented and shaped under a magnetic field, then sealed and packaged, isostatically pressed, and finally vacuum sintered after removing the packaging to obtain rare-earth permanent magnet sintered blanks, i.e., rare-earth permanent magnet materials. Rare-earth permanent magnet alloy powders are highly susceptible to oxidation and can spontaneously combust in the atmosphere; therefore, they must be isolated from the atmosphere during the production process. Currently, the magnetic field presses and vacuum sintering furnaces used in the industry are mostly manufactured by different companies, resulting in poor production line compatibility. The process from molding alloy powder into compacts to sintering blanks largely requires manual operation. This includes material preparation, placement and boxing, stacking the boxes for loading into the furnace, transporting materials between processes, and unloading the sintered blanks. This presents several problems, including the risk of material oxidation due to exposure to the external environment during manual handling, which can hinder further improvement of rare earth permanent magnet material performance. Furthermore, manual operation not only reduces production efficiency, wastes manpower, and increases production costs, but also affects product quality stability due to the inherent uncertainties of manual operation, leading to a certain defect rate. Additionally, after the vacuum sintering process, the stacked boxes need to be laid flat in layers before the sintered blanks can be removed. Since the temperature of the sintered blanks when exiting the furnace is typically between 50-200℃, this adds considerable inconvenience to handling the boxes and the blanks within them. Summary of the Invention

[0003] To address the aforementioned problems, this invention proposes a vacuum sintering production line for manufacturing high-quality rare-earth permanent magnet materials.

[0004] This vacuum sintering production line includes a carton box, a conveyor box, and a vacuum sintering furnace; there are two or more vacuum sintering furnaces; each vacuum sintering furnace includes a furnace shell, a first isolation valve, a material moving device, and a heating chamber; the first isolation valve is connected to the front flange of the furnace shell, and the heating chamber is located inside the furnace shell; the carton box and the vacuum sintering furnace are arranged side by side; the conveyor box can move to the opposite side of the carton box and the vacuum sintering furnace, respectively docking with the carton box and the vacuum sintering furnace; the material moving device drives the sintering boxes in the heating chamber to move within the conveyor box and the vacuum sintering furnace; a second isolation valve is provided at one end of the conveyor box; a third isolation valve is provided at one end of the carton box; after the conveyor box docks with the carton box, the second and third isolation valves are opened, connecting the space inside the conveyor box with the space inside the carton box, allowing the sintering boxes to move between the carton box and the conveyor box; the carton box and the conveyor box are separate Before starting, close the second and third isolation valves. The box and the conveyor box form independent sealed spaces, ensuring that both are isolated from the atmosphere. After separating from the box, the conveyor box moves to the opposite side of the vacuum sintering furnace and docks with it. After docking, open the first and second isolation valves to transfer the sintered material box containing the pressed blanks into the vacuum sintering furnace. Then, the conveyor box separates from the vacuum sintering furnace. Before separating from the vacuum sintering furnace, close the first and second isolation valves to isolate the atmosphere in both the conveyor box and the vacuum sintering furnace from the atmosphere. After the vacuum sintering process in the vacuum sintering furnace is completed, the sintered material box containing the sintered blanks is transferred back into the conveyor box through docking with the vacuum sintering furnace. Then, the conveyor box separates from the vacuum sintering furnace. A conveyor belt is installed inside the box.

[0005] The vacuum sintering production line also includes a feeding box, a fourth isolation valve, and a first glove box; the first glove box includes a first glove box shell and a first tray conveying device; one end of the first glove box shell is connected to a boxing box; the feeding box includes a feeding box shell, a second tray conveying device, and a feeding gate; the fourth isolation valve is located between the first glove box shell and the feeding box shell, the feeding gate is located at one end of the feeding box shell, and the second tray conveying device is located inside the feeding box shell; a conveyor belt extends into the first glove box shell; gloves are provided on the first glove box shell, and operators use gloves to remove the packaging from the pressed blanks in the feeding tray on the first tray conveying device and place them on the conveyor belt, which then sends the pressed blanks to the boxing box; opening the fourth isolation valve allows the feeding tray to move between the first and second tray conveying devices.

[0006] The vacuum sintering production line also includes a discharge mechanism; the discharge mechanism is arranged side by side with the box and the vacuum sintering furnace; the conveyor box can be moved laterally to the opposite side of the discharge mechanism, and then connected with the discharge mechanism by longitudinal movement. After connection, the second isolation valve is opened, and the sintered material box in the conveyor box can be conveyed to the discharge mechanism, or the sintered material box on the discharge mechanism can be conveyed to the conveyor box.

[0007] In one embodiment, the discharge mechanism includes a box-picking device, a fixed transfer assembly, a moving roller assembly, and a fixed roller assembly. The box-picking device is mounted on the fixed transfer assembly, which is also equipped with a conveyor roller. After the conveyor box is connected to the discharge mechanism, the box-picking device can reciprocate between the conveyor box and the discharge mechanism. The moving roller assembly is connected to the fixed transfer assembly, or to one or more sets of fixed roller assemblies. During operation, the box-picking device enters the conveyor box, removes the sintered box, and places it on the conveyor roller of the fixed transfer assembly. The conveyor roller of the fixed transfer assembly then conveys the sintered box to the moving roller assembly. The moving roller assembly first connects to one set of fixed roller assemblies to convey the sintered box to this set of fixed roller assemblies. Then, the moving roller assembly connects to another set of fixed roller assemblies carrying empty sintered boxes to convey the empty sintered boxes to the moving roller assembly. Finally, the empty sintered boxes are conveyed into the conveyor box via the moving roller assembly and the box-picking device.

[0008] The boxing box includes a box body, a robotic arm, and a sintered material box conveying device. A magnetic block conveying device is installed on the outside of the box body. One end of the box body is connected to a third isolation valve, and the side is connected to the magnetic block conveying device. A conveyor belt inside the magnetic block conveying device extends into the box body. The robotic arm and the sintered material box conveying device are located inside the box body. The robotic arm picks up the pressed blanks conveyed into the box body and places them into the sintered material box on the sintered material box conveying device. After the box body and the conveying box are connected, the sintered material box conveying device can reciprocate within the box body and the conveying box. The sintered material box conveying device can move horizontally or vertically.

[0009] The conveying box includes a conveying box body, a box clamping and lifting device, a longitudinal moving device, and a transverse moving device; a second isolation valve is connected to the conveying box body; the conveying box body is installed on the guide rail of the transverse moving device, and the conveying box body together with the second isolation valve moves longitudinally on the guide rail of the transverse moving device to realize the docking of the conveying box with the boxing box or the docking of the conveying box with the vacuum sintering furnace.

[0010] After the box and the conveyor box are connected, the sintering box conveying device of the box and the clamping and lifting device of the box in the conveyor box, together with the action of the robot arm, complete the process of automatically loading the pressed billet into the sintering box and automatically stacking the sintering box.

[0011] The vacuum sintering furnace includes a movable bottom plate assembly; the bottom plate assembly includes a sintering material box support, a heat insulation screen, and a bottom plate shell, with rollers installed on the bottom plate shell, allowing the bottom plate assembly to move along a track on the inner wall of the furnace shell via the rollers; the material moving device includes a moving rod, a sealing assembly, and a transmission device, with the transmission device located outside the furnace shell, the sealing assembly connected to the furnace shell, and the transmission device driving the moving rod through the sealing assembly into the interior of the furnace shell; the moving rod is connected to the bottom plate assembly, driving the bottom plate assembly to move.

[0012] The vacuum sintering furnace also includes an air-cooled heat exchange system and a gas filling system; the air-cooled heat exchange system is located at the rear of the furnace shell, and the air inlet pipe of the air-cooled heat exchange system is connected to the furnace shell; the air-cooled heat exchange system includes a cooling fan and a heat exchanger; the gas filling system includes a gas filling valve; after heating is completed, the gas filling valve is opened to fill the vacuum sintering furnace with protective gas, and the cooling fan is started when the pressure inside the furnace reaches the set value.

[0013] In a preferred embodiment, the vacuum sintering furnace has a horizontal structure with a water-cooled jacket on the furnace shell. The vacuum sintering furnace also includes a cooling system that provides cooling to the furnace shell.

[0014] The heating chamber also includes two side plate assemblies, located on the left and right sides of the heating chamber respectively. The exhaust pipe of the air-cooled heat exchange system splits into two pipelines before entering the furnace shell, each pipeline equipped with a valve. These pipelines pass through the furnace shell and connect to the two side plate assemblies of the heating chamber. Each side plate assembly includes a side plate shell, a heat insulation screen, and nozzles. The nozzles are fixed to the side plate shell and extend through the heat insulation screen of the side plate assembly into the heating chamber. The two valves open and close simultaneously or alternately. Pipes are located on the outer side of the side plate assemblies, connecting to the nozzles and pipelines. Gas flowing from the exhaust pipe of the air-cooled heat exchange system is injected into the heating chamber through the nozzles.

[0015] The heating chamber also includes a front cover assembly and an upper plate assembly.

[0016] After the first isolation valve is opened, the base plate assembly can be moved to the outside of the vacuum sintering furnace; a movable conveyor box is provided outside the vacuum sintering furnace; the vacuum sintering furnace can connect with the conveyor box located outside the vacuum sintering furnace through the first isolation valve; after the vacuum sintering furnace connects with the conveyor box, the base plate assembly moves into the conveyor box to carry the sintering box containing the pressed blank, and then carries the sintering box back into the vacuum sintering furnace. Then, the conveyor box and the vacuum sintering furnace separate, and the vacuum sintering furnace performs the vacuum sintering process.

[0017] After the vacuum sintering process is completed, the vacuum sintering furnace is connected to the conveyor box, and the sintering material box containing the sintered blanks is transferred from the vacuum sintering furnace to the conveyor box through the bottom plate assembly. Before and after the vacuum sintering furnace and the conveyor box are connected, the atmosphere in the conveyor box and the vacuum sintering furnace is kept isolated from the atmosphere.

[0018] In one embodiment of this utility model, the vacuum system of the vacuum sintering furnace includes a mechanical vacuum pump that directly exhausts to the atmosphere and a Roots vacuum pump that further enhances the vacuum level inside the furnace.

[0019] In a preferred embodiment of this invention, the vacuum sintering furnace further includes a sintering box opening device and an opening assembly; sintering boxes are placed on a sintering box support; the opening assemblies are distributed on both sides of the sintering boxes; the sintering box opening device is located at the top of the vacuum furnace shell, and a guide shaft passes through the vacuum furnace shell and the insulation screen of the heating chamber and connects to the opening assembly; the sintering box opening device can drive the guide shaft to move the opening assembly up and down. When the vacuum sintering furnace is working, the opening assembly drives the lids of the sintering boxes loaded in the vacuum sintering furnace to open or close simultaneously. There are more than three layers of sintering boxes loaded in the furnace, and each layer of sintering boxes has more than one lid.

[0020] In a preferred embodiment, the magnetic block conveying device is connected to four or more automatic magnetic field presses.

[0021] The magnetic block conveying device serves as a common conveying channel for the automatic magnetic field presses, transporting the pressed blanks from each press to the packaging box. Even if an automatic magnetic field press undergoes maintenance or resumes operation after maintenance, the airtightness of the magnetic block conveying device remains unaffected. It can still function as a common conveying channel to automatically transport the pressed blanks to other automatic magnetic field presses, ensuring the normal operation of the rare earth permanent magnet production line.

[0022] In this invention, the entire process of rare earth permanent magnet material manufacturing, from alloy powder to sintered blank magnetic field forming and vacuum sintering, is completed automatically under nitrogen protection or vacuum conditions. This ensures that the easily oxidized rare earth permanent magnet raw materials are always isolated from the atmospheric environment, which helps to reduce the oxygen content in the material and further improve the performance of the rare earth permanent magnet material. In addition, the material preparation, placement and boxing, furnace loading, material transportation between processes, and unloading of sintered blanks are all completed automatically. This not only improves production efficiency, saves human resources, and reduces production costs, but also eliminates the uncertainty of manual operation, reduces the product defect rate, and improves the stability of product quality.

[0023] Current vacuum sintering furnaces in the industry generally utilize a glove box structure and rely on manual operation for protective feeding. Furthermore, most employ a forklift mechanism to move materials from the glove box to the material bed of the vacuum sintering furnace. During material movement, the cantilevered forklift exhibits a certain degree of vibration. The inventors discovered that in this production line, because two isolation valves are installed between the vacuum sintering furnace and the conveyor box, if this type of vacuum sintering furnace is still used, the cantilever length of the forklift would need to be increased due to the larger travel distance, easily leading to exacerbated vibration. This vibration can cause micro-defects in the pressed blanks in the sintering box, negatively impacting the quality of the sintered rare earth permanent magnet materials. The vacuum sintering furnace of this invention includes a movable base plate assembly with rollers on its outer shell. The base plate assembly can move along a track on the inner wall of the furnace shell via the rollers. After the vacuum sintering furnace docks with the conveyor box, the base plate assembly moves into the conveyor box to carry the sintering box containing the pressed blanks, and then returns the sintering box to the vacuum sintering furnace. The movable base plate assembly structure ensures smooth transmission and effectively overcomes the aforementioned problems. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structural layout of one embodiment of the vacuum sintering production line in this utility model.

[0025] Figure 2 This is a front view structural schematic diagram of one embodiment of the vacuum sintering furnace involved in this utility model.

[0026] Figure 3 This is a side view of one embodiment of the vacuum sintering furnace involved in this utility model. Detailed Implementation

[0027] like Figures 1 to 3 As shown, the vacuum sintering production line of this utility model includes a packaging box 1, a conveying box 2, and a vacuum sintering furnace 3; there are two or more vacuum sintering furnaces 3. The vacuum sintering furnace 3 includes a furnace shell 4, a first isolation valve 5, a material moving device 6, a heating chamber 7, and a vacuum system 8. The first isolation valve 5 is connected to the front flange of the furnace shell, and the heating chamber 7 is located inside the furnace shell 4; the packaging box 1 and the vacuum sintering furnace 3 are arranged side by side; the conveying box 2 can move to the opposite side of the packaging box 1 and the vacuum sintering furnace 3, docking with both respectively. The material moving device 6 drives the sintering box in the heating chamber to move within the conveying box 2 and the vacuum sintering furnace 3; a second isolation valve 9 is provided at one end of the conveying box 2; a third isolation valve 10 is provided at one end of the boxing box 1; after the conveying box 2 is connected to the boxing box 1, the second isolation valve 9 and the third isolation valve 10 are opened, and the space inside the conveying box is connected to the space inside the boxing box, so that the sintering box 11 can move between the boxing box 1 and the conveying box 2.

[0028] Before separating the box 1 and the conveyor box 2, the second isolation valve 9 and the third isolation valve 10 are closed, forming independent sealed spaces for both. This ensures that both the box 1 and the conveyor box 2 are isolated from the atmosphere. After separating from the box 1, the conveyor box 2 moves to the opposite side of the vacuum sintering furnace 3 and docks with it. After docking, the first isolation valve 5 and the second isolation valve 9 are opened, and the sintered material box 31 containing the pressed blanks in the conveyor box 2 is conveyed into the vacuum sintering furnace 3. Then, the conveyor box 2 separates from the vacuum sintering furnace 1. Before separating the conveyor box from the vacuum sintering furnace, the first and second isolation valves are closed to ensure that the atmosphere in both the conveyor box and the vacuum sintering furnace is isolated from the atmosphere. After the vacuum sintering process in the vacuum sintering furnace is completed, the sintered material box containing the sintered blanks is conveyed into the conveyor box through docking with the vacuum sintering furnace. Then, the conveyor box separates from the vacuum sintering furnace. A conveyor belt is installed inside the box 1.

[0029] The vacuum sintering production line also includes a feed box 12, a fourth isolation valve 13, and a first glove box 14.

[0030] The first glove box includes a first glove box housing and a first pallet conveying device; one end of the first glove box housing is connected to the carton box; the feeding box includes a feeding box housing, a second pallet conveying device, and a feeding door; a fourth isolation valve is located between the first glove box housing and the feeding box housing, the feeding door is located at one end of the feeding box housing, and the second pallet conveying device is located inside the feeding box housing; a conveyor belt extends into the first glove box housing; gloves are provided on the first glove box housing, and the operator uses the gloves to remove the packaging from the pressed blanks in the feeding pallet on the first pallet conveying device and place them on the conveyor belt, and the pressed blanks are sent to the carton box by the conveyor belt; when the fourth isolation valve is opened, the feeding pallet can move between the first pallet conveying device and the second pallet conveying device.

[0031] The vacuum sintering production line also includes a discharge mechanism 15; the discharge mechanism 15 is arranged side by side with the packaging box 1 and the vacuum sintering furnace 3.

[0032] The conveying box can be moved laterally to the opposite side of the discharge mechanism, and then moved longitudinally to dock with the discharge mechanism. After docking, the second isolation valve is opened, and the sintered material box in the conveying box can be conveyed to the discharge mechanism, or the sintered material box on the discharge mechanism can be conveyed to the conveying box.

[0033] In one embodiment, the discharge mechanism includes a box-picking device, a fixed transfer assembly, a moving roller assembly, and a fixed roller assembly. The box-picking device is mounted on the fixed transfer assembly, which is also equipped with a conveyor roller. After the conveyor box is connected to the discharge mechanism, the box-picking device can reciprocate between the conveyor box and the discharge mechanism. The moving roller assembly is connected to the fixed transfer assembly, or to one or more sets of fixed roller assemblies. During operation, the box-picking device enters the conveyor box, removes the sintered box, and places it on the conveyor roller of the fixed transfer assembly. The conveyor roller of the fixed transfer assembly then conveys the sintered box to the moving roller assembly. The moving roller assembly first connects to one set of fixed roller assemblies to convey the sintered box to this set of fixed roller assemblies. Then, the moving roller assembly connects to another set of fixed roller assemblies carrying empty sintered boxes to convey the empty sintered boxes to the moving roller assembly. Finally, the empty sintered boxes are conveyed into the conveyor box via the moving roller assembly and the box-picking device.

[0034] The boxing box includes the box body, a robotic arm, and a sintering material box conveying device.

[0035] The box is equipped with a magnetic block conveying device 16 on its exterior; one end of the box is connected to the third isolation valve 10, and the side is connected to the magnetic block conveying device 16.

[0036] The conveyor belt inside the magnetic block conveying device extends into the boxing box; the robotic arm and sintering box conveying device are located inside the boxing box; the robotic arm picks up the pressed blanks conveyed into the boxing box and places them into the sintering box on the sintering box conveying device; after the boxing box and the conveying box are connected, the sintering box conveying device can move back and forth within the boxing box and the conveying box. The sintering box conveying device can move horizontally or vertically.

[0037] The conveying box includes a conveying box body 17, a box clamping and lifting device 18, a longitudinal moving device 19, and a transverse moving device 20; the second isolation valve 9 is connected to the conveying box body 17; the conveying box body 17 is installed on the guide rail 21 of the transverse moving device, and the conveying box body 17 together with the second isolation valve 9 moves longitudinally on the guide rail 21 of the transverse moving device to realize the docking of the conveying box with the boxing box or the docking of the conveying box with the vacuum sintering furnace.

[0038] After the box and the conveyor box are connected, the sintering box conveying device of the box and the clamping and lifting device of the box in the conveyor box, together with the action of the robot arm, complete the process of automatically loading the pressed billet into the sintering box and automatically stacking the sintering box.

[0039] The vacuum sintering furnace 3 includes a movable bottom plate assembly 22; the bottom plate assembly 22 includes a sintering material box support 23, a heat insulation screen 24, and a bottom plate shell 25. Rollers 26 are provided on the bottom plate shell 25, and the bottom plate assembly 22 can move along a track 27 on the inner wall of the furnace shell via the rollers 26; the material moving device 6 includes a moving rod 28, a sealing assembly 29, and a transmission device 30. The transmission device 30 is located outside the furnace shell 4, and the sealing assembly 29 is connected to the furnace shell 4. The transmission device 30 drives the moving rod 28 through the sealing assembly 29 into the interior of the furnace shell 4; the moving rod 28 is connected to the bottom plate assembly 22, driving the bottom plate assembly 22 to move. A heater 32 is provided inside the heating chamber 7.

[0040] The vacuum sintering furnace also includes an air-cooled heat exchange system and a gas filling system; the air-cooled heat exchange system is located at the rear of the furnace shell, and the air inlet pipe of the air-cooled heat exchange system is connected to the furnace shell; the air-cooled heat exchange system includes a cooling fan and a heat exchanger; the gas filling system includes a gas filling valve; after heating is completed, the gas filling valve is opened to fill the vacuum sintering furnace with protective gas, and the cooling fan is started when the pressure inside the furnace reaches the set value.

[0041] In a preferred embodiment, the vacuum sintering furnace has a horizontal structure with a water-cooled jacket on the furnace shell. The vacuum sintering furnace also includes a cooling system that provides cooling to the furnace shell.

[0042] The heating chamber also includes two side plate assemblies, located on the left and right sides of the heating chamber respectively. The exhaust pipe of the air-cooled heat exchange system splits into two pipelines before entering the furnace shell, each pipeline equipped with a valve. These pipelines pass through the furnace shell and connect to the two side plate assemblies of the heating chamber. Each side plate assembly includes a side plate shell, a heat insulation screen, and nozzles. The nozzles are fixed to the side plate shell and extend through the heat insulation screen of the side plate assembly into the heating chamber. The two valves open and close simultaneously or alternately. Pipes are located on the outer side of the side plate assemblies, connecting to the nozzles and pipelines. Gas flowing from the exhaust pipe of the air-cooled heat exchange system is injected into the heating chamber through the nozzles.

[0043] The heating chamber also includes a front cover assembly and an upper plate assembly.

[0044] After the first isolation valve is opened, the base plate assembly can be moved to the outside of the vacuum sintering furnace; a movable conveyor box is provided outside the vacuum sintering furnace; the vacuum sintering furnace can connect with the conveyor box located outside the vacuum sintering furnace through the first isolation valve; after the vacuum sintering furnace connects with the conveyor box, the base plate assembly moves into the conveyor box to carry the sintering box containing the pressed blank, and then carries the sintering box back into the vacuum sintering furnace. Then, the conveyor box and the vacuum sintering furnace separate, and the vacuum sintering furnace performs the vacuum sintering process.

[0045] After the vacuum sintering process is completed, the vacuum sintering furnace is connected to the conveyor box, and the sintering material box containing the sintered blanks is transferred from the vacuum sintering furnace to the conveyor box through the bottom plate assembly. Before and after the vacuum sintering furnace and the conveyor box are connected, the atmosphere in the conveyor box and the vacuum sintering furnace is kept isolated from the atmosphere.

[0046] In one embodiment of this utility model, the vacuum system of the vacuum sintering furnace includes a mechanical vacuum pump that directly exhausts to the atmosphere and a Roots vacuum pump that further enhances the vacuum level inside the furnace.

[0047] In a preferred embodiment of this invention, the vacuum sintering furnace further includes a sintering box opening device and an opening assembly; sintering boxes are placed on the sintering box support; the opening assembly is located inside the heater and distributed on both sides of the sintering boxes; the sintering box opening device is located at the top of the vacuum furnace shell, and a guide shaft passes through the vacuum furnace shell and the insulation screen of the heating chamber and connects to the opening assembly; the sintering box opening device can drive the guide shaft to move the opening assembly up and down. When the vacuum sintering furnace is working, the opening assembly drives the lids of the sintering boxes loaded in the vacuum sintering furnace to open or close simultaneously. There are more than three layers of sintering boxes loaded in the furnace, and each layer of sintering boxes has more than one lid.

[0048] In a preferred embodiment, the magnetic block conveying device is connected to four or more automatic magnetic field presses.

Claims

1. A vacuum sintering production line, characterized in that: It includes a carton, a conveyor box, and a vacuum sintering furnace; there are two or more vacuum sintering furnaces; the vacuum sintering furnace includes a furnace shell, a first isolation valve, a material moving device, and a heating chamber; the first isolation valve is connected to the front flange of the furnace shell, and the heating chamber is located inside the furnace shell; the carton and the vacuum sintering furnace are arranged side by side; the conveyor box can move to the opposite side of the carton and the vacuum sintering furnace, and dock with the carton and the vacuum sintering furnace respectively; the material moving device drives the sintering boxes in the heating chamber to move within the conveyor box and the vacuum sintering furnace; a second isolation valve is provided at one end of the conveyor box; a third isolation valve is provided at one end of the carton; a conveyor belt is provided inside the carton.

2. The vacuum sintering production line according to claim 1, characterized in that: The vacuum sintering production line also includes a feeding box, a fourth isolation valve, and a first glove box; the first glove box includes a first glove box shell and a first tray conveying device; one end of the first glove box shell is connected to a boxing box; the feeding box includes a feeding box shell, a second tray conveying device, and a feeding gate; the fourth isolation valve is located between the first glove box shell and the feeding box shell, the feeding gate is located at one end of the feeding box shell, and the second tray conveying device is located inside the feeding box shell; a conveyor belt extends into the first glove box shell; gloves are provided on the first glove box shell, and operators use gloves to remove the packaging from the pressed blanks in the feeding tray on the first tray conveying device and place them on the conveyor belt, which then sends the pressed blanks to the boxing box; opening the fourth isolation valve allows the feeding tray to move between the first and second tray conveying devices.

3. The vacuum sintering production line according to claim 1, characterized in that: The vacuum sintering production line also includes a discharge mechanism; the discharge mechanism is arranged side by side with the box and the vacuum sintering furnace; the conveyor box can be moved laterally to the opposite side of the discharge mechanism, and then connected with the discharge mechanism by longitudinal movement. After connection, the second isolation valve is opened, and the sintered material box in the conveyor box can be conveyed to the discharge mechanism, or the sintered material box on the discharge mechanism can be conveyed to the conveyor box.

4. The vacuum sintering production line according to claim 1, characterized in that: The vacuum sintering production line also includes a discharge mechanism; the discharge mechanism includes a box-picking device, a fixed transfer assembly, a moving roller assembly, and a fixed roller assembly; the box-picking device is mounted on the fixed transfer assembly, which is also equipped with a conveyor roller; after the conveyor box is connected to the discharge mechanism, the box-picking device can reciprocate between the conveyor box and the discharge mechanism; the moving roller assembly is connected to the fixed transfer assembly, or to one or more sets of fixed roller assemblies; during operation, the box-picking device enters the conveyor box, takes out the sintered box, and places it on the conveyor roller of the fixed transfer assembly, which then conveys the sintered box to the moving roller assembly; the moving roller assembly first connects to one set of fixed roller assemblies, conveying the sintered box to this set of fixed roller assemblies, then connects to another set of fixed roller assemblies carrying empty sintered boxes, conveying the empty sintered boxes to the moving roller assembly, and then, through the moving roller assembly and the box-picking device, the empty sintered box is conveyed into the conveyor box.

5. The vacuum sintering production line according to claim 1, characterized in that: The boxing box includes a boxing box body, a robotic arm, and a sintered material box conveying device; a magnetic block conveying device is installed on the outside of the boxing box; one end of the boxing box body is connected to a third isolation valve, and the side is connected to the magnetic block conveying device; a conveyor belt installed inside the magnetic block conveying device extends into the boxing box body; the robotic arm and the sintered material box conveying device are located inside the boxing box body; the robotic arm grabs the pressed billet conveyed into the boxing box body and places it into the sintered material box on the sintered material box conveying device; after the boxing box and the conveying material box are connected, the sintered material box conveying device can move back and forth within the boxing box and the conveying material box body.

6. The vacuum sintering production line according to claim 5, characterized in that: The sintering material box conveying device can move horizontally or vertically.

7. The vacuum sintering production line according to claim 1, characterized in that: The conveying box includes a conveying box body, a box clamping and lifting device, a longitudinal moving device, and a transverse moving device; a second isolation valve is connected to the conveying box body; the conveying box body is installed on the guide rail of the transverse moving device, and the conveying box body together with the second isolation valve moves longitudinally on the guide rail of the transverse moving device to realize the docking of the conveying box with the boxing box or the docking of the conveying box with the vacuum sintering furnace.

8. The vacuum sintering production line according to claim 5, characterized in that: The conveying box includes a box clamping and lifting device; after the boxing box and the conveying box are connected, the reciprocating movement of the sintering box conveying device in the boxing box and the clamping and lifting of the box clamping and lifting device in the conveying box, together with the action of the robot arm, complete the process of automatically loading the pressed billet into the sintering box and automatically stacking the sintering boxes.

9. The vacuum sintering production line according to claim 1, characterized in that: The vacuum sintering furnace includes a movable bottom plate assembly; the bottom plate assembly includes a sintering material box support, a heat insulation screen, and a bottom plate shell, with rollers installed on the bottom plate shell, allowing the bottom plate assembly to move along a track on the inner wall of the furnace shell via the rollers; the material moving device includes a moving rod, a sealing assembly, and a transmission device, with the transmission device located outside the furnace shell, the sealing assembly connected to the furnace shell, and the transmission device driving the moving rod through the sealing assembly into the interior of the furnace shell; the moving rod is connected to the bottom plate assembly, driving the bottom plate assembly to move.

10. The vacuum sintering production line according to claim 1, characterized in that: The vacuum sintering furnace also includes a material box opening device and an opening assembly; sintering material boxes are placed on the sintering material box support; the opening assembly is distributed on both sides of the sintering material box; the material box opening device is located at the top of the vacuum furnace shell, and a guide shaft passes through the vacuum furnace shell and the heat insulation screen of the heating chamber and is connected to the opening assembly; the material box opening device can drive the guide shaft to move the opening assembly up and down.

Images