Flexible automatic heat treatment production line for closed transfer of working procedures

Abstract

The invention relates to the technical field of heat treatment, in particular to a procedure closed transfer flexible automatic heat treatment production line which comprises at least three sealed process devices and a workpiece conveying track. Butt joint stations used for butt joint and fixing of the sealed process equipment are arranged on the left side and the right side of the workpiece conveying track respectively; a workpiece transport vehicle is adaptively arranged on the workpiece conveying track; a sealed containing cavity is formed in the workpiece transport vehicle, and containing cavity doors capable of being opened are arranged on the left side and the right side of the sealed containing cavity correspondingly. A sealed processing cavity is arranged in the sealed processing equipment, and a processing cavity door capable of being opened is arranged on one side of the sealed processing cavity. The process sequence of the production line can be dynamically recombined according to process requirements, different sealed process devices can be flexibly called to form a new production process, and workpieces can be freely and flexibly switched among the sealed process devices according to different process requirements under the state of air isolation and constant temperature coherence in the whole process, so that the production efficiency is improved. And flexible transfer transportation and treatment are carried out.

Description

Technical Field

[0001] The present invention relates to the field of heat treatment technology, in particular to a process closed transfer flexible automatic heat treatment production line. Background Art

[0002] Heat treatment is a key process that changes the internal structure of solid metals or alloys by heating, keeping them warm, and cooling them to obtain the desired properties. It does not change the shape of the workpiece, but improves the mechanical properties of the material, such as hardness, strength, toughness, and wear resistance, by precisely controlling temperature and time.

[0003] Traditional heat treatment equipment is a single independent function (gas quenching + oil quenching + tempering, annealing, cleaning, deep cooling, carburizing, etc.). Each heat treatment equipment is usually fixed at a fixed workstation. After the workpiece completes a process (such as quenching), it needs to be removed and exposed to the air, and then transferred to the next equipment (such as a tempering furnace) manually or by a simple robot. For workpieces that need to maintain high temperature continuous treatment, this exposure process will cause the high-temperature workpiece to react with oxygen and water vapor in the air, resulting in structural changes and reduced workpiece quality. Summary of the Invention

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the title of the invention of this application to avoid blurring the purpose of this section, the abstract of the specification and the title of the invention, and such simplifications or omissions cannot be used to limit the scope of the invention.

[0005] In view of the problems existing in the above-mentioned prior art, the present invention is proposed. To solve the above-mentioned technical problems, the present invention provides the following technical solutions: A process closed transfer flexible automated heat treatment production line, comprising at least three sealed process equipment and a workpiece conveying track; On the left and right sides of the workpiece conveying track, docking stations for docking and fixing sealed process equipment are respectively provided; The workpiece conveying track is adapted to be provided with a workpiece transport vehicle; The workpiece transport vehicle is provided with a sealed accommodating chamber, and both left and right sides of the sealed accommodating chamber are provided with openable accommodating chamber doors; The sealed process equipment is provided with a sealed processing chamber, and an openable processing chamber door is provided on one side of the sealed processing chamber; A workpiece delivery device is also provided in the sealed accommodating chamber; The workpiece delivery device includes two forks, which have a lifting and horizontal movement working state. The movement amplitude of the two forks is greater than the width of the workpiece transport vehicle, and has a working state of exceeding the left and right sides of the workpiece transport vehicle and passing through the left and right sides. A supporting platform is also provided between the two fork teeth and located in the middle of the sealed accommodation cavity; The height of the supporting platform is higher than the lowest position of the two fork tines after they are lowered, and lower than the highest position of the two fork tines after they are raised; An electromagnetic heating system is embedded in the support platform; The workpiece transport vehicle is equipped with an ion wind temperature equalization system; The ion wind temperature equalization system includes a high voltage power supply and at least four ion wind generating units; The air outlet end of the ion wind generating unit is provided with an ion wind acceleration unit; The ion wind acceleration unit includes an accelerating ion emitting electrode and an accelerating collecting electrode; The connection terminal of the accelerating collecting electrode is connected to the supporting platform, so that the workpiece to be processed placed on the supporting platform serves as the accelerating collecting electrode.

[0006] The above design sets up multiple docking stations on the left and right sides of the workpiece conveyor track, and the sealed process equipment is plug-and-play like a "module", so that the process sequence of the production line can be dynamically reorganized according to the process requirements, and different sealed process equipment can be flexibly called to form a new production process.

[0007] The workpiece transport vehicle serves as a conveying device for workpieces to be processed. It takes the workpiece out of one sealed process equipment and transports it to the next sealed process equipment on the workpiece conveying track. The workpiece can be freely and flexibly switched between various sealed process equipment according to different process requirements, thus building a flexible and automated heat treatment production line.

[0008] The workpiece transport vehicle moves along the workpiece conveying track to the processing chamber door of a sealed process equipment. The fork tine of the workpiece delivery device moves out of the sealed accommodating chamber of the workpiece transport vehicle and enters the sealed processing chamber of the sealed process equipment to obtain the workpiece. The obtained workpiece is then delivered into the sealed accommodating chamber of the workpiece transport vehicle, and the workpiece is temporarily placed on the support platform. The accommodating chamber door and the processing chamber door are closed to realize the delivery of the workpiece.

[0009] The workpiece transport vehicle moves along the workpiece conveying track to another sealed process equipment. The sealed receiving chamber is connected to the sealed processing chamber to form an airtight mechanism. The fork tines of the workpiece delivery device place the workpiece on the support platform into the sealed processing chamber of another sealed process equipment. The receiving chamber door and the processing chamber door are closed to realize the transfer and transportation of the workpiece. Through a pair of fork teeth, the workpiece to be processed is transported in both directions, reducing the amount of conveying equipment. At the same time, the workpiece to be processed is isolated from gas when transferred between the sealed process equipment and the workpiece transport vehicle. For workpieces that need to be continuously processed at high temperatures, it prevents them from being exposed to the air and causing structural changes, without affecting the surface quality and mechanical properties of the products.

[0010] An electromagnetic heating system is embedded in the support platform, which not only keeps the workpiece warm during transfer and transportation, but also allows it to continue to be heated. The workpiece can enter the next sealed process equipment at a temperature close to the requirements of the next process, preventing the workpiece from changing its structure due to temperature drop during transfer and transportation, thereby improving the quality of the workpiece.

[0011] An ion wind temperature equalization system is installed on the workpiece transport vehicle, and the workpiece to be processed placed on the support platform itself serves as an accelerating collection electrode, generating a directional accelerating airflow toward the workpiece to be processed, thereby enhancing the convection of hot air in the sealed accommodation chamber, improving the temperature uniformity of the workpiece during the heating and insulation process in the sealed accommodation chamber, and effectively eliminating local temperature differences.

[0012] This application equips the workpiece transport vehicle with bidirectional reversing forks and an electromagnetic heating system, and seals it with any modular sealed process equipment along the workpiece conveying track, thereby achieving flexible transfer, transportation and processing of the workpiece while being isolated from air and maintaining a constant temperature throughout the process. This solves the problems of oxidation, decarburization and temperature drop of the workpiece during long-term transfer and transportation during the heat treatment process, and improves the heat treatment efficiency.

[0013] Preferably, there are at least five docking stations; the sealed process equipment is docked to its respective docking station; at least three sealed process equipment include at least two heating furnaces; and at least three sealed process equipment include at least one of a tempering furnace, a cryogenic chamber, a gas quenching furnace, a salt cleaning chamber, an oil quenching furnace, and a salt bath furnace. A workpiece transporter can transfer workpieces heated in one heating furnace to any one of the tempering furnace, cryogenic chamber, gas quenching furnace, salt cleaning chamber, oil quenching furnace, and salt bath furnaces. This separates the high-cost tempering furnace, cryogenic chamber, gas quenching furnace, salt cleaning chamber, oil quenching furnace, and salt bath furnace from the heating furnace, allowing production to be organized by assembling multiple universal heating furnaces with tempering furnaces, cryogenic chambers, gas quenching furnaces, salt cleaning chambers, oil quenching furnaces, and salt bath furnaces, thereby reducing equipment costs.

[0014] Preferably, the processing chamber door has a docking mechanism that docks with the accommodating chamber door. After the docking mechanism completes the docking, the sealed accommodating chamber is connected to the sealed processing chamber and an airtight mechanism is formed; the docking mechanism includes a docking frame arranged outside the sealed process equipment, and a docking interface is passed through the docking frame; the docking interface and the sealed processing chamber are isolated or connected by a processing chamber door that can be opened and closed telescopically; the docking interface and the accommodating processing chamber are isolated or connected by a accommodating chamber door that can be opened and closed telescopically; when the accommodating processing chamber, the docking interface, and the sealed processing chamber are connected, a transfer channel is formed for the workpiece to be transferred between the sealed processing chamber and the sealed accommodating chamber; the docking mechanism also includes an annular sealing ring, which is arranged on the docking frame and surrounds the docking interface. After the docking is completed, the sealing ring makes the transfer channel an airtight space.

[0015] Preferably, the workpiece delivery device further comprises a slide rail disposed on the bottom wall of the sealed containment chamber; two slide rails are provided, one on each side of the support platform; each slide rail is adapted to be provided with a slider that moves along the slide rail; a lifting platform is fixed to the slider, and the fork tines are disposed on the lifting platform. The slide rail, slider, and lifting platform cooperate to enable the fork tines to achieve vertical lifting and horizontal movement; the horizontal movement of the fork tines enables the transfer of the workpiece between the sealed processing chamber and the sealed containment chamber, and the vertical lifting of the fork tines allows the workpiece to be temporarily placed on the support platform during transfer and transportation.

[0016] Preferably, another electromagnetic heating system is provided above the sealed accommodating chamber; the electromagnetic heating system located below and the electromagnetic heating system located above are arranged relative to each other; thus, gas isolation and heating and heat preservation are achieved during transfer and transportation. When a high-temperature workpiece needs to be transported, the electromagnetic heating system and the other electromagnetic heating system are started in advance before docking with the sealed process equipment, forming a double-sided heating environment in the vertical direction. At the same time, the workpiece can be heated by the electromagnetic heating system and the other electromagnetic heating system to a temperature close to the target temperature of the next process while being transported to the next equipment, thereby shortening the process time and reducing energy consumption.

[0017] Preferably, the workpiece transport vehicle is equipped with the high-voltage power supply; the ion wind generating unit is located within a sealed housing; the ion wind generating unit comprises an ion emitting electrode, a collecting electrode, and an air duct; the ion emitting electrode and collecting electrode are fixed within the air duct; the ion emitting electrode is an annular metal sheet with a uniformly arranged serrated structure at the front end; the collecting electrode is a hollow conical tube, with the large end of the conical tube proximal to the ion emitting electrode and the small end proximal to the workpiece to be processed on the support platform. When the tip of the serrated structure is connected to high voltage, the tip discharges, increasing the electric field strength and thereby the ion wind speed.

[0018] Preferably, the accelerated ion emission electrode is fixed in the air guide tube. The accelerated ion emission electrode and the accelerated collection electrode cooperate to accelerate the ion wind airflow generated by the ion wind generating unit, so that the directional high-temperature airflow blows toward the workpiece to be processed, thereby improving the temperature uniformity of the workpiece to be processed and effectively eliminating local temperature differences.

[0019] Preferably, the air duct is connected to the side wall of the sealed containment chamber via an insulating bracket; at least four air ducts are symmetrically fixed to both sides of the sealed containment chamber; the air inlet end of the air duct located on the lower side faces the electromagnetic heating system; the air inlet end of the air duct located on the upper side faces another electromagnetic heating system; and the air outlet end of the air duct faces the workpiece to be processed on the support platform. The high-temperature airflow is blown toward the workpiece to be processed through the air duct. The airflow generated by the ion wind generating unit and the ion wind accelerating unit located on the left and right sides of the sealed containment chamber penetrates the dead zone of the workpiece to be processed, accelerating the process of heat conduction from the surface of the workpiece to the interior, making the overall temperature of the workpiece more uniform.

[0020] Preferably, the ion emitting electrode and the accelerated ion emitting electrode are connected to the positive electrode of the high voltage power supply through a high temperature resistant insulated metal bus; the collecting electrode and the accelerated collecting electrode are connected to the negative electrode of the high voltage power supply through a high temperature resistant insulated metal bus.

[0021] In summary, the present invention has the following beneficial effects: 1. The process sequence of the production line can be dynamically reorganized according to process requirements, and different sealed process equipment can be flexibly called upon to form a new production process. The workpiece transport vehicle serves as the conveying equipment for the workpieces to be processed. It takes the workpieces out of one sealed process equipment and transports them to the next sealed process equipment on the workpiece conveying track. The workpieces can be freely and flexibly switched between the sealed process equipment according to different process requirements, thus constructing a flexible and automated heat treatment production line. After the workpiece transport vehicle is docked with the sealed process equipment through the docking structure, an airtight transfer channel is formed for the transfer of workpieces between the sealed treatment chamber and the sealed receiving chamber. For workpieces that need to be continuously processed at high temperatures, it prevents them from being exposed to air and causing structural changes, without affecting the surface quality and mechanical properties of the product. 2. The electromagnetic heating system embedded in the support platform and another electromagnetic heating system installed above the sealed accommodation cavity form a double-sided heating environment in the vertical direction, so that the workpiece can not only be kept warm during the transfer and transportation process, but can even continue to be heated, preventing the workpiece from changing its structure due to temperature drop during the transfer and transportation process, thereby improving the quality of the workpiece.

[0022] 3. By installing an ion wind temperature equalization system on the workpiece transport vehicle, the generated airflow can force the hot air generated by the electromagnetic heating system and another electromagnetic heating system to blow toward the workpiece, thereby enhancing the convection of the hot air in the sealed accommodation chamber and improving the temperature uniformity of the workpiece during the heating and insulation process in the sealed accommodation chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive work. Among them: Figure 1 This is a schematic diagram of the overall structure of the process closed transfer flexible automated heat treatment production line of the present invention; Figure 2 This is a schematic diagram of the structure of a docking frame for a process closed transfer flexible automated heat treatment production line of the present invention; Figure 3 This is a schematic diagram of the interior structure of a workpiece transport vehicle for a closed-process transfer flexible automated heat treatment production line of the present invention; Figure 4 This is a schematic diagram of the structure of the air guide tube of the process closed transfer flexible automated heat treatment production line of the present invention; Figure 5 This is a schematic diagram of the cross-sectional structure of the air duct of the process closed transfer flexible automated heat treatment production line of the present invention.

[0024] In the figure, 1. Sealed process equipment; 101. Heating furnace; 102. Tempering furnace; 103. Deep cold box; 104. Gas quenching furnace; 105. Salt cleaning chamber; 106. Oil quenching furnace; 107. Salt bath furnace; 2. Workpiece conveying track; 3. Docking station; 4. Workpiece transport vehicle; 5. Sealed accommodating chamber; 6. Docking frame; 7. Docking interface; 8. Processing chamber door; 9. Sealing ring; 10. Slide rail; 11. Support platform; 12. Lifting platform; 13. Fork tine; 14. Emitting electrode; 15. Collecting electrode; 16. Air guide tube; 17. Accelerated ion emission electrode; 19. Insulating bracket. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Next, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, when describing embodiments of the present invention, cross-sectional views illustrating device structures may be partially enlarged and not to scale. Furthermore, these schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, three-dimensional dimensions, including length, width, and depth, should be included.

[0028] Furthermore, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in less than one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it necessarily refer to a single embodiment or a selective embodiment that is mutually exclusive of other embodiments.

[0029] Example 1, reference Figures 1 to 5 , a process closed transfer flexible automated heat treatment production line, including at least three sealed process equipment 1, and also including a workpiece conveying production line; The workpiece conveying production line includes a workpiece conveying track 2; On the left and right sides of the workpiece conveying track 2, docking stations 3 for docking and fixing the sealed process equipment 1 are respectively provided; The workpiece conveying track 2 is adapted to be provided with a workpiece transport vehicle 4 for transporting the workpiece along the workpiece conveying track 2; A sealed accommodating chamber 5 is provided in the workpiece transport vehicle 4, and openable accommodating chamber doors are provided on both the left and right sides of the sealed accommodating chamber 5; The sealed process equipment 1 is provided with a sealed processing chamber, and an openable processing chamber door 8 is provided on one side of the sealed processing chamber; A workpiece delivery device is also provided in the sealed accommodating chamber 5; The workpiece delivery device includes two fork teeth 13, which have a working state of lifting and horizontal movement. The movement amplitude of the two fork teeth 13 is greater than the width of the workpiece transport vehicle 4, and has a working state of exceeding the left and right sides of the workpiece transport vehicle 4 and passing through the left and right sides; A supporting platform 11 is also provided between the two fork tines 13 and located in the middle of the sealed accommodation chamber 5; The height of the support platform 11 is higher than the lowest position of the two fork tines 13 after they are lowered, and lower than the highest position of the two fork tines 13 after they are raised; An electromagnetic heating system is embedded in the support platform 11; The workpiece transport vehicle 4 is equipped with an ion wind temperature equalization system; The ion wind temperature equalization system includes a high voltage power supply and at least four ion wind generating units; An ion wind acceleration unit is provided at the air outlet end of the ion wind generating unit; The ion wind acceleration unit includes an accelerated ion emission electrode 17 and an accelerated collection electrode; The connection terminal of the accelerating collecting electrode is connected to the supporting platform 11 , so that the workpiece to be processed placed on the supporting platform 11 serves as the accelerating collecting electrode.

[0030] In this embodiment, multiple docking stations 3 are set on the left and right sides of the workpiece conveying track 2, and the sealed process equipment 1 is plug-and-play like a "module", so that the process sequence of the production line can be dynamically reorganized according to the process requirements, and different sealed process equipment 1 can be flexibly called to form a new production process.

[0031] The workpiece transport vehicle 4 serves as a conveying device for the workpiece to be processed. It takes the workpiece out of a sealed process equipment 1 and transports it to the next sealed process equipment 1 on the workpiece conveying track 2. The workpiece can be freely and flexibly switched between the sealed process equipment 1 according to different process requirements, thus constructing a flexible and automated heat treatment production line.

[0032] The workpiece transport vehicle 4 moves along the workpiece conveying track 2 to the processing chamber door 8 of a sealed process equipment 1, and the fork tine 13 of the workpiece delivery device moves out of the sealed accommodating chamber 5 of the workpiece transport vehicle 4 and enters the sealed processing chamber of the sealed process equipment 1 to obtain the workpiece, and then sends the obtained workpiece into the sealed accommodating chamber 5 of the workpiece transport vehicle 4, and temporarily places the workpiece on the support platform 11, and closes the accommodating chamber door and the processing chamber door 8.

[0033] The workpiece transport vehicle 4 moves along the workpiece conveying track 2 to another required docking station 3. The fork tine 13 of the workpiece delivery device places the workpiece on the supporting platform 11 into the sealed processing chamber of another sealed process equipment 1, closes the accommodating chamber door and the processing chamber door 8, and realizes the transfer, transportation and delivery of the workpiece.

[0034] Through a pair of fork teeth 13, the workpiece to be processed is transported in both directions, which reduces the amount of conveying equipment and achieves gas isolation when the workpiece to be processed is transferred between the sealed process equipment 1 and the workpiece transport vehicle 4. For workpieces that need to be continuously processed at high temperature, it prevents them from being exposed to the air and causing structural changes, without affecting the surface quality and mechanical properties of the product.

[0035] An electromagnetic heating system is embedded in the support platform 11, which not only keeps the workpiece warm during the transfer and transportation process, but also allows it to continue to be heated. The workpiece can enter the next sealed process equipment 1 at a temperature close to the temperature required by the next process, preventing the workpiece from changing its structure due to temperature drop during the transfer and transportation process, thereby improving the quality of the workpiece.

[0036] An ion wind temperature equalization system is installed on the workpiece transport vehicle 4, and the workpiece to be processed placed on the support platform 11 itself serves as an accelerating collection electrode, generating a directional accelerating airflow toward the workpiece to be processed, thereby enhancing the convection of hot air in the sealed accommodating chamber 5, and improving the temperature uniformity of the workpiece during the heating and insulation process in the sealed accommodating chamber 5, effectively eliminating local temperature differences.

[0037] The present application equips the workpiece transport vehicle 4 with bidirectional reversing forks 13 and an electromagnetic heating system, and seals and docks the workpiece transport track 2 with any modular sealed process equipment 1 along the line, thereby realizing flexible transfer, transportation and processing of the workpiece in a state of complete air isolation and constant temperature consistency, solving the problems of oxidation, decarburization and temperature drop of the workpiece during long-term transfer and transportation during the heat treatment process, and improving the heat treatment efficiency.

[0038] There are no less than five docking stations 3; the sealed process equipment 1 are docked to their respective docking stations 3; at least three sealed process equipment 1 include at least two heating furnaces 101; at least three sealed process equipment 1 include at least one of the tempering furnace 102, the deep cold box 103, the gas quenching furnace 104, the salt cleaning chamber 105, the oil quenching furnace 106, and the salt bath furnace 107. The workpiece transport vehicle 4 can transfer the workpiece that has been heated in a heating furnace 101 to any one of the tempering furnace 102, deep cold box 103, gas quenching furnace 104, salt cleaning chamber 105, oil quenching furnace 106, and salt bath furnace 107, and separate the high-cost tempering furnace 102, deep cold box 103, gas quenching furnace 104, salt cleaning chamber 105, oil quenching furnace 106, and salt bath furnace 107 from the heating furnace 101. The production is organized in a manner of multiple universal heating furnaces 101 equipped with tempering furnaces 102, deep cold box 103, gas quenching furnace 104, salt cleaning chamber 105, oil quenching furnace 106, and salt bath furnace 107, thereby reducing equipment costs.

[0039] The processing chamber door 8 has a docking mechanism for docking with the accommodating chamber door. After the docking mechanism completes the docking, the sealed accommodating chamber 5 is connected to the sealed processing chamber and an airtight mechanism is formed; the docking mechanism includes a docking frame 6 arranged outside the sealed process equipment 1, and a docking interface 7 is passed through the docking frame 6; the docking interface 7 and the sealed processing chamber are isolated or connected by the processing chamber door 8 that can be opened and closed telescopically; the docking interface 7 and the accommodating processing chamber are isolated or connected by the accommodating chamber door that can be opened and closed telescopically; when the accommodating processing chamber, the docking interface 7, and the sealed processing chamber are connected, a transfer channel is formed for the workpiece to be transferred between the sealed processing chamber and the sealed accommodating chamber 5; the docking mechanism also includes an annular sealing ring 9, which is arranged on the docking frame 6 and surrounds the docking interface 7. After the docking is completed, the sealing ring 9 makes the transfer channel an airtight space.

[0040] The workpiece delivery device also includes a slide rail 10 mounted on the bottom wall of the sealed accommodating chamber 5. Two slide rails 10 are located on either side of a support platform 11. Each slide rail 10 is fitted with a slider that moves along the slide rail 10. A lifting platform 12 is secured to the slider, and fork tines 13 are mounted on the lifting platform 12. The slide rail 10, slider, and lifting platform 12 cooperate to enable the fork tines 13 to be raised and lowered vertically and moved horizontally. The horizontal movement of the fork tines 13 transfers the workpiece between the sealed processing chamber and the sealed accommodating chamber 5, while the vertical lifting of the fork tines 13 allows the workpiece to be temporarily placed on the support platform 11 during transfer and transportation.

[0041] Another electromagnetic heating system is provided above the sealed accommodating chamber 5; the electromagnetic heating system located below and the electromagnetic heating system located above are arranged relative to each other; they achieve both gas isolation and heating and heat preservation during transfer and transportation. When a high-temperature workpiece needs to be transported, the electromagnetic heating system and the other electromagnetic heating system are started in advance before docking with the sealed process equipment 1, forming a double-sided heating environment in the vertical direction, improving temperature uniformity. At the same time, the workpiece can be heated by the electromagnetic heating system and the other electromagnetic heating system to a temperature close to the target temperature of the next process while being transported to the next device, shortening the process time and reducing energy consumption.

[0042] The workpiece transport vehicle 4 is equipped with a high-voltage power supply. The ion wind generating unit is located within the sealed housing chamber 5 and comprises an ion emitting electrode 14, a collecting electrode 15, and an air duct 16. The ion emitting electrode 14 and the collecting electrode 15 are fixed within the air duct 16. The ion emitting electrode 14 is a ring-shaped metal sheet with a uniformly arranged sawtooth structure at the front end. The collecting electrode 15 is a hollow conical tube with the large end of the tube close to the ion emitting electrode 14 and the small end close to the workpiece to be processed on the support platform 11. When the tip of the sawtooth structure is connected to high voltage, it discharges at the tip, increasing the electric field strength and thus the ion wind speed.

[0043] The accelerated ion emission electrode 17 is fixed in the air guide tube 16. The accelerated ion emission electrode 17 cooperates with the accelerated collection electrode to accelerate the ion wind airflow generated by the ion wind generating unit, so that the airflow ejected from the air guide tube 16 is forced to blow toward the workpiece, thereby enhancing the convection of the hot air in the sealed accommodation chamber 5 and improving the temperature uniformity of the workpiece during the heating and heat preservation process in the sealed accommodation chamber 5.

[0044] Air ducts 16 are connected to the sidewalls of the sealed chamber 5 via insulating brackets 19. At least four air ducts 16 are symmetrically fixed to either side of the sealed chamber 5. The air inlet end of the air duct 16 on the lower side faces the electromagnetic heating system; the air inlet end of the air duct 16 on the upper side faces the other electromagnetic heating system; and the air outlet end of the air duct 16 faces the workpiece to be processed on the support platform 11. High-temperature airflow is blown toward the workpiece to be processed through the air ducts 16. The airflow generated by the ion wind generating units and ion wind acceleration units on the left and right sides of the sealed chamber 5 accelerates the process of heat transfer from the workpiece surface to the interior, making the overall temperature of the workpiece more uniform.

[0045] The ion emission electrode 14 and the accelerated ion emission electrode 17 are connected to the positive electrode of the high voltage power supply through a high temperature resistant insulated metal busbar; the collecting electrode 15 and the accelerated collecting electrode are connected to the negative electrode of the high voltage power supply through a high temperature resistant insulated metal busbar.

[0046] When in use, there are loading platforms, unloading platforms and buffer platforms on both sides of the workpiece conveying track 2. The workpiece to be processed is placed on the loading platform, and the workpiece transport trolley 4 moves along the workpiece conveying track 2 to the loading platform position. The accommodating chamber door close to the loading platform side is opened, and the transport flatbed trolley moves along the slide rail 10 to the accommodating chamber door position, and the fork tine 13 moves under the workpiece to be processed. The lifting platform 12 controls the fork tine 13 to move up, and the fork tine 13 drives the workpiece to be processed to move up and disconnect from the loading platform. After that, the transport flatbed trolley moves in the opposite direction along the slide rail 10, and the fork tine 13 drives the workpiece to be processed back to the sealed accommodating chamber 5. When the workpiece to be processed is directly above the supporting platform 11, the lifting platform 12 controls the fork tine 13 to move down, so that the workpiece to be processed is stably placed on the supporting platform 11; Afterwards, the workpiece transport vehicle 4 moves along the workpiece conveying track 2 to the docking position of the first sealed process equipment 1 set in the production process. The sealing ring 9 connected to the docking frame 6 of the sealed process equipment 1 forms an airtight structure at this position. Then, the processing chamber door 8 and the receiving chamber door are opened, and the receiving processing chamber, the docking interface 7, and the sealed processing chamber are connected to form an airtight transfer channel for transferring workpieces in the sealed processing chamber and the sealed receiving chamber 5. The lifting platform 12 controls the fork teeth 13 to move upward, and the fork teeth 13 drive the workpiece to be processed to move upward until it is disconnected from the support platform 11. Then the transport flatbed trolley moves along the slide rail 10 to deliver the workpiece to be processed into the sealed processing chamber. After that, the processing chamber door 8 is closed and the receiving chamber door is closed. Afterwards, the workpiece transport vehicle 4 moves to the loading platform and delivers another workpiece to the sealed process equipment 1 set for another production process, or transfers the workpiece in the sealed process equipment 1 in another production process to the next sealed process equipment 1. If the workpiece transferred between two sealed process equipment 1 needs to be kept warm, the electromagnetic heating system and the other electromagnetic heating system are turned on in advance to form a double-sided heating environment in the vertical direction, so that the workpiece is always heated to a temperature close to the target temperature of the next process on the way to the next equipment; At the same time, during the insulation or heating process, the workpiece transport vehicle 4 turns on the high-voltage power supply, applies a DC voltage, and cooperates with the inert gas in the sealed accommodating chamber 5 to form a directional airflow, which is forced to blow toward the workpiece, thereby enhancing the convection of the hot air in the sealed accommodating chamber 5, forcing the promotion of efficient heat exchange between its surface and the surrounding environment, and making the overall temperature of the workpiece more uniform.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A process closed transfer flexible automated heat treatment production line, comprising at least three sealed process equipment (1), characterized in that: Also includes a workpiece conveying track (2); On the left and right sides of the workpiece conveying track (2), docking stations (3) for docking and fixing the sealed process equipment (1) are respectively provided; A workpiece transport vehicle (4) is adapted to be provided on the workpiece conveying track (2); A sealed accommodating chamber (5) is provided in the workpiece transport vehicle (4), and openable accommodating chamber doors are provided on both left and right sides of the sealed accommodating chamber (5); The sealed process equipment (1) is provided with a sealed processing chamber, and an openable processing chamber door (8) is provided on one side of the sealed processing chamber; A workpiece delivery device is also provided in the sealed accommodating cavity (5); The workpiece delivery device includes two fork teeth (13), the two fork teeth (13) have a working state of lifting and horizontal movement, the movement amplitude of the two fork teeth (13) is greater than the width of the workpiece transport vehicle (4), and has a working state of exceeding the left and right sides of the workpiece transport vehicle (4) and passing through the left and right sides; A supporting platform (11) is also provided between the two fork teeth (13) and is located in the middle of the sealed accommodating cavity (5); The height of the support platform (11) is higher than the lowest position of the two fork tines (13) after they are lowered, and lower than the highest position of the two fork tines (13) after they are raised; An electromagnetic heating system is embedded in the support platform (11); The workpiece transport vehicle (4) is equipped with an ion wind temperature equalization system; The ion wind temperature equalization system includes a high voltage power supply and at least four ion wind generating units; The air outlet end of the ion wind generating unit is provided with an ion wind acceleration unit; The ion wind acceleration unit comprises an accelerating ion emission electrode (17) and an accelerating collection electrode; The connection terminal of the accelerating collection electrode is connected to the supporting platform (11), so that the workpiece to be processed placed on the supporting platform (11) serves as the accelerating collection electrode.

2. The process closed transfer flexible automated heat treatment production line according to claim 1, characterized in that: The number of docking stations (3) is no less than five; The sealed process equipment (1) is docked to the respective docking stations (3); At least three sealed process equipment (1) including at least two heating furnaces (101); At least three sealed process equipment (1) include at least one of a tempering furnace (102), a cryogenic box (103), a gas quenching furnace (104), a salt cleaning chamber (105), an oil quenching furnace (106), and a salt bath furnace (107).

3. The process closed transfer flexible automated heat treatment production line according to claim 1 is characterized by: The processing chamber door (8) has a docking mechanism for docking with the accommodating chamber door. After the docking mechanism is docked, the sealed accommodating chamber (5) is connected to the sealed processing chamber to form an airtight mechanism. The docking mechanism comprises a docking frame (6) arranged outside the sealed process equipment (1), and a docking interface (7) is passed through the docking frame (6); The docking interface (7) and the sealed processing chamber are isolated or connected by a processing chamber door (8) that can be opened and closed telescopically; The docking interface (7) and the accommodating processing chamber are isolated or connected by a retractable accommodating chamber door; When the accommodating processing chamber, the docking interface (7), and the sealed processing chamber are connected, a transfer channel is formed for transferring the workpiece within the sealed processing chamber and the sealed accommodating chamber (5); The docking mechanism further comprises an annular sealing ring (9), which is arranged on the docking frame (6) and surrounds the docking interface (7). After docking is completed, the sealing ring (9) makes the transfer channel an airtight space.

4. The process closed transfer flexible automated heat treatment production line according to claim 1, characterized in that: The workpiece delivery device further comprises a slide rail (10) provided on the bottom wall of the sealed accommodating cavity (5); There are two slide rails (10), which are located on both sides of the support platform (11); Each of the slide rails (10) is adapted to be provided with a slider that moves along the slide rail (10); A lifting platform (12) is fixed on the slider, and the fork teeth (13) are arranged on the lifting platform (12).

5. The process closed transfer flexible automated heat treatment production line according to claim 1, characterized in that: Another electromagnetic heating system is provided above the sealed accommodating cavity (5); The electromagnetic heating system located below and the electromagnetic heating system located above are arranged opposite to each other; While achieving gas isolation during transfer and transportation, heating and heat preservation are also achieved.

6. The process closed transfer flexible automated heat treatment production line according to claim 5, characterized in that: The workpiece transport vehicle (4) is equipped with the high-voltage power supply; The ion wind generating unit is located in the sealed accommodating cavity (5); The ion wind generating unit comprises an ion emission electrode (14), a collecting electrode (15) and an air guide cylinder (16); The ion emitting electrode (14) and the collecting electrode (15) are fixed in the air guide tube (16); The ion emitting electrode (14) is an annular metal sheet, and the front end of the annular metal sheet is provided with a uniformly arranged sawtooth structure; The collecting electrode (15) is a hollow conical tube, the large end of the conical tube is close to the ion emission electrode (14), and the small end is close to the workpiece to be processed on the supporting platform (11).

7. The process closed transfer flexible automated heat treatment production line according to claim 6, characterized in that: The accelerated ion emission electrode (17) is fixed in the air guide cylinder (16).

8. The process closed transfer flexible automated heat treatment production line according to claim 6, characterized in that: The air guide tube (16) is connected to the side wall of the sealed accommodating cavity (5) via an insulating bracket (19); At least four of the air guide tubes (16) are symmetrically fixed on both sides of the sealed accommodating cavity (5); The air inlet end of the air guide tube (16) located on the lower side faces the electromagnetic heating system; The air inlet end of the air guide tube (16) located on the upper side faces another electromagnetic heating system; The air outlet end of the air guide tube (16) faces the workpiece to be processed on the support platform (11).

9. The process closed transfer flexible automated heat treatment production line according to claim 6, characterized in that: The ion emission electrode (14) and the accelerated ion emission electrode (17) are connected to the positive electrode of a high-voltage power supply via a high-temperature resistant insulating metal busbar; The collecting electrode (15) and the accelerating collecting electrode are connected to the negative electrode of a high-voltage power supply via a high-temperature-resistant insulating metal busbar.

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