Magnetic field heat treatment furnace and heat treatment method

Abstract

The present invention belongs to the field of magnetic field heat treatment technology, and discloses a magnetic field heat treatment furnace and a heat treatment method. The magnetic field heat treatment furnace can generate a transverse magnetic field and / or a longitudinal magnetic field according to production needs by arranging a second magnetic field generating device and / or a third magnetic field generating device on a material rack assembly, and combining with a first magnetic field generating device in the furnace body, thereby overcoming the limitation that a traditional magnetic field heat treatment furnace can only provide a single-direction magnetic field, so that the workpiece to be processed is magnetized in a more complex magnetic field environment, effectively improving the optimization space of the performance of the workpiece to be processed; the loading and unloading device includes a material rack assembly and a conveying assembly, and the material rack assembly can not only carry the workpiece to be processed, but also be locked with the furnace body and used as a furnace door, making the structure more compact, and through the coordinated movement of the conveying assembly and the material rack assembly, the loading and unloading process is simplified, making the loading and unloading process more simple and efficient, especially suitable for large-scale industrial production, and significantly improving production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of magnetic field heat treatment, in particular to a magnetic field heat treatment furnace and a heat treatment method. Background Art

[0002] Magnetic field heat treatment refers to a heat treatment process in which the material to be processed is placed in a magnetic field, heated to near the Curie temperature for a period of time, and cooled in a magnetic field at a certain speed. It is often used in the preparation of magnetic functional materials such as nanocrystalline alloys, Permalloy, and silicon steel. Existing magnetic field heat treatment furnaces can usually only provide a magnetic field in a single direction. This magnetization method is relatively fixed. For materials to be processed that require a complex magnetic field environment, a single-direction magnetic field is difficult to meet the processing requirements, limiting the performance optimization of the material; and the loading and unloading process of existing magnetic field heat treatment furnaces is relatively complicated and is not suitable for large-scale industrial production.

[0003] Therefore, there is an urgent need for a magnetic field heat treatment furnace and a heat treatment method to solve the problems in the prior art. Summary of the invention

[0004] The purpose of the present invention is to provide a magnetic field heat treatment furnace, so that the workpiece to be processed is magnetized in a more complex magnetic field environment, effectively improving the optimization space of the performance of the workpiece to be processed, and simplifying the loading and unloading process, making the loading and unloading process simpler and more efficient.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] Magnetic field heat treatment furnace, including:

[0007] A furnace body, wherein an opening is provided at the bottom of the furnace body, and a first magnetic field generating device is provided in the furnace body, and the first magnetic field generating device can generate a first magnetic field;

[0008] A loading and unloading device, comprising a rack assembly and a conveying assembly, wherein the conveying assembly is located below the furnace body and is used to drive the rack assembly to move between a loading station and an opening of the furnace body;

[0009] The material rack assembly is provided with a second magnetic field generating device, which can generate a second magnetic field, and the second magnetic field generating device can carry the workpiece to be processed placed along the first direction; and / or, the material rack assembly is provided with a third magnetic field generating device, which can generate a third magnetic field, and the third magnetic field generating device can carry the workpiece to be processed placed along the second direction, the first direction is perpendicular to the second direction, and the magnetic field directions of the second magnetic field and the third magnetic field are perpendicular.

[0010] Optionally, the transport assembly includes a first material moving assembly and a second material moving assembly, and the first material moving assembly includes:

[0011] A first slide rail is arranged below the furnace body along the second direction, the loading station is located at an end of the first slide rail away from the furnace body, and the second material moving assembly is located at an end of the first slide rail close to the furnace body and directly below the opening;

[0012] A loading and unloading trolley is slidably connected to the first slide rail, and the rack assembly is arranged on the loading and unloading trolley;

[0013] The first driving member is used to drive the loading and unloading trolley carrying the material rack assembly to move along the first slide rail to move the material rack assembly from the loading station to directly below the opening, and the second material moving assembly is used to drive the material rack assembly to move from directly below the opening to the opening.

[0014] Optionally, the magnetic field heat treatment furnace further includes a locking device, and the rack assembly includes:

[0015] A material-carrying furnace platform, which is placed on the loading and unloading trolley;

[0016] A material rack, wherein the material rack is arranged on the material receiving furnace platform, the second magnetic field generating device and / or the third magnetic field generating device are arranged on the material rack, the material receiving furnace platform can be sealed in the opening, and the locking device is used to limit the material receiving furnace platform from escaping from the opening so that the material receiving furnace platform serves as the furnace door of the furnace body.

[0017] Optionally, the second magnetic field generating device includes:

[0018] A plurality of first material stringing rods, the material rack is provided with a plurality of first insertion holes, and a first end of one of the first material stringing rods is inserted into one of the first insertion holes;

[0019] A plurality of first positioning fixtures, wherein two ends of the first positioning fixtures are respectively provided with string rod holes, and two of the string rod holes are sleeved on the second ends of two adjacent first string rods, so that the plurality of first string rods are connected in series;

[0020] At least two first lead copper bars are arranged on the material receiving furnace table at intervals and are electrically connected to the material rack, so that a plurality of first material string rods are connected in series to form a first closed loop.

[0021] Optionally, a ventilation hole is provided in the middle of the first positioning tool.

[0022] Optionally, a hollow structure is provided in the middle of the material rack, and the hollow structure penetrates the material rack along the first direction.

[0023] Optionally, the third magnetic field generating device includes:

[0024] A fixed plate and two bases, the fixed plate is limited to the material rack, and the two bases are arranged on the fixed plate relatively along the second direction;

[0025] Extension seats, each of which can be stacked on the base in sequence, a second plug hole is provided between the base and the extension seat, and between two adjacent extension seats, a plurality of the second plug holes are arranged at intervals along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other;

[0026] A second material stringing rod, the second material stringing rod is inserted into the workpiece to be processed, and two ends of the second material stringing rod can be respectively inserted into two second insertion holes opposite to each other along the second direction, and a plurality of the second material stringing rods are connected in parallel;

[0027] At least two second lead copper bars are arranged on the material receiving furnace table at intervals, and the two second lead copper bars are electrically connected to the material rack respectively, so that the plurality of second material string rods connected in parallel form a second closed loop.

[0028] Optionally, a plurality of first semicircular grooves are provided on the base along the third direction, and a plurality of second semicircular grooves are provided on the extension seat along the third direction, the first semicircular grooves and the second semicircular grooves are arranged relative to each other to surround and form the second socket, and two relative second semicircular grooves can surround and form the second socket.

[0029] Optionally, a plurality of positioning rods are provided at intervals in the circumferential direction of the material rack, a plurality of open grooves are provided in the circumferential direction of the fixing plate, and the positioning rods are clamped in the corresponding open grooves.

[0030] Optionally, an assembly hole is provided in the positioning rod, a connecting portion is provided on the extension seat, an assembly boss is provided on one side of the connecting portion, and an assembly groove is provided on the other side, and the assembly boss can be inserted into the assembly hole or the assembly groove.

[0031] Optionally, a first positioning groove is provided on the base, a first positioning protrusion is provided on one side of the extension seat, and a second positioning groove is provided on the other side, and the first positioning protrusion can be inserted into the first positioning groove, or inserted into the second positioning groove.

[0032] Optionally, a plurality of support rods are provided on the material-bearing furnace platform, and the support rods can be inserted into the corresponding assembly holes.

[0033] The purpose of the present invention is to provide a magnetic field heat treatment method, which allows the user to selectively apply the first magnetic field, the second magnetic field and the third magnetic field according to actual production needs, thereby realizing customized processing of the workpiece to be processed and meeting the production needs of different materials and processes.

[0034] To achieve this object, the present invention adopts the following technical solutions:

[0035] The magnetic field heat treatment method is applied to the magnetic field heat treatment furnace mentioned above, and is characterized in that the magnetic field heat treatment method comprises:

[0036] Controlling the material rack assembly carrying the workpiece to be processed to move to the opening of the furnace body, and locking the material rack assembly on the furnace body;

[0037] The furnace body is controlled to operate according to a preset processing process and a magnetization process, wherein the magnetization process includes applying a first magnetic field, and / or applying a second magnetic field, and / or applying a third magnetic field.

[0038] Optionally, the magnetization process includes simultaneously turning on a first magnetic field generating device, a second magnetic field generating device and a third magnetic field generating device;

[0039] The first magnetic field generating device applies a first magnetic field to the workpiece to be processed placed along a first direction, and the second magnetic field generating device applies a second magnetic field to the workpiece to be processed placed along the first direction, and the workpiece to be processed is acted upon by the magnetic field in both the axial and radial directions; and / or,

[0040] The first magnetic field generating device applies a first magnetic field to the workpiece to be processed placed along the second direction, and the third magnetic field generating device applies a third magnetic field to the workpiece to be processed placed along the second direction. The workpiece to be processed is only affected by the magnetic field in the axial direction.

[0041] Beneficial effects:

[0042] The magnetic field heat treatment furnace provided by the present invention can generate a transverse magnetic field and / or a longitudinal magnetic field according to production needs by arranging a second magnetic field generating device and / or a third magnetic field generating device on the material rack assembly, and combining with the first magnetic field generating device in the furnace body, thereby overcoming the limitation that the traditional magnetic field heat treatment furnace can only provide a single-directional magnetic field, so that the workpiece to be processed is magnetized in a more complex magnetic field environment, effectively improving the optimization space of the performance of the workpiece to be processed; the loading and unloading device includes a material rack assembly and a conveying assembly, and the material rack assembly can not only carry the workpiece to be processed, but also be engaged and locked with the furnace body and used as a furnace door, making the structure more compact, and, through the coordinated movement of the conveying assembly and the material rack assembly, the loading and unloading process is simplified, making the loading and unloading process more simple and efficient, particularly suitable for large-scale industrial production, and significantly improving production efficiency.

[0043] The magnetic field heat treatment method provided by the present invention allows the user to selectively apply the first magnetic field, the second magnetic field and the third magnetic field to the workpiece to be processed in the furnace body according to actual production needs, thereby realizing customized processing of the workpiece to be processed and meeting the production needs of different materials and processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 is a schematic structural diagram of a magnetic field heat treatment furnace provided in Embodiment 1 of the present invention at a certain viewing angle;

[0045] Figure 2 is a schematic structural diagram of a material transfer device provided in Embodiment 1 of the present invention;

[0046] Figure 3 It is a structural schematic diagram of a second magnetic field generating device provided on a material rack assembly provided in Embodiment 1 of the present invention;

[0047] Figure 4 yes Figure 3 A partial enlarged view of the middle A;

[0048] Figure 5 It is a schematic diagram of the assembly structure of the first material stringing rod and the first positioning tool provided in the first embodiment of the present invention.

[0049] Figure 6 is a cross-sectional view of a furnace body provided in Embodiment 1 of the present invention;

[0050] Figure 7 It is a structural schematic diagram of a furnace body and a locking device provided in Embodiment 1 of the present invention;

[0051] Figure 8 is a structural schematic diagram of a furnace provided in Embodiment 1 of the present invention;

[0052] Fig. 9 This is a structural view of the vacuum pipeline and the protective atmosphere pipeline provided in the first embodiment of the present invention.

[0053] Fig.10 is a schematic structural diagram of the magnetic field heat treatment furnace provided in the first embodiment of the present invention from another perspective;

[0054] Fig.11 It is a structural schematic diagram of a third magnetic field generating device provided on a rack assembly according to the second embodiment of the present invention;

[0055] Fig.12 is an exploded view of a third magnetic field generating device provided in Embodiment 2 of the present invention;

[0056] Fig.13 is a schematic structural diagram of the extension seat provided in the second embodiment of the present invention from another viewing angle;

[0057] Fig.14 It is a flow chart of the magnetic field heat treatment method provided in Example 4 of the present invention.

[0058] In the figure:

[0059] 100, furnace body; 110, furnace chamber; 120, heating layer; 130, magnetic layer; 140, insulation layer; 150, shell; 160, locking fitting block;

[0060] 200, loading and unloading device; 210, material rack assembly; 211, material bearing furnace; 2111, support rod; 212, material rack; 2121, positioning rod; 21211, assembly hole; 2122, hollow structure; 2123, lifting ear; 220, handling assembly; 221, first material moving assembly; 2211, first slide rail; 2212, loading and unloading trolley; 22121, first roller; 2213, first driving member; 222, second material moving assembly; 2221, second slide rail; 2222, second driving member; 22221, second driving motor; 22222, lead screw; 2223, bracket; 22231, support plate; 22232, spring; 22233, second roller;

[0061] 300, locking device; 310, locking cylinder; 320, locking rod; 330, fixing bracket;

[0062] 400, a first magnetic field generating device; 410, a solenoid;

[0063] 500, second magnetic field generating device; 510, first material stringing rod; 511, first plug-in portion; 512, second plug-in portion; 513, first material stringing area; 520, first positioning tool; 521, ventilation hole; 530, first lead copper bar;

[0064] 600, third magnetic field generating device; 610, base; 611, first semicircular groove; 612, first positioning groove; 613, second plug hole; 620, extension seat; 621, second semicircular groove; 622, connecting portion; 6221, assembly boss; 6222, assembly groove; 623, first positioning protrusion; 624, second positioning groove; 630, second string rod; 640, second lead copper bar; 650, fixing plate; 651, opening groove;

[0065] 700, temperature control device; 710, wire temperature thermocouple group; 720, temperature control thermocouple group; 730, material temperature thermocouple group;

[0066] 800, vacuum pipeline; 810, vacuum mechanical pump;

[0067] 900, protective atmosphere pipeline; 910, large flow pipeline; 920, small flow pipeline; 930, flow solenoid valve;

[0068] 1000, pressure relief pipeline; 1001, pressure relief solenoid valve;

[0069] 1100, pressure regulating pipeline; 1101, process pressure regulating valve; 1102, exhaust valve;

[0070] 1200, heat circulation fan; 1300, cooling fan; 1400, hot air fan; 1500, cold air fan; 1600, water-cooled heat exchange tank; 1700, electrical cabinet. DETAILED DESCRIPTION

[0071] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0072] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0073] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0074] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0075] Embodiment 1

[0076] This embodiment provides a magnetic field heat treatment furnace for performing magnetic treatment on a workpiece. Figure 1-Figure 8As shown, the magnetic field heat treatment furnace includes a furnace body 100 and a loading and unloading device 200. An opening is provided below the furnace body 100. A first magnetic field generating device 400 is built into the furnace body 100. The first magnetic field generating device 400 can generate a first magnetic field. The loading and unloading device 200 includes a rack assembly 210 and a conveying assembly 220. The conveying assembly 220 is located below the furnace body 100 and is used to drive the rack assembly 210 to move between the loading station and the opening of the furnace body 100. Among them, a second magnetic field generating device 500 is provided on the rack assembly 210. The second magnetic field generating device 500 can generate a second magnetic field, and the second magnetic field generating device 500 can carry the workpiece to be processed placed along the first direction; and / or, a third magnetic field generating device 600 is provided on the rack assembly 210. The third magnetic field generating device 600 can generate a third magnetic field, and the third magnetic field generating device 600 can carry the workpiece to be processed placed along the second direction. The magnetic field directions of the second magnetic field and the third magnetic field are perpendicular.

[0077] By arranging a second magnetic field generating device 500 and / or a third magnetic field generating device 600 on the material rack assembly 210, and combining it with the first magnetic field generating device 400 in the furnace body 100, a transverse magnetic field and / or a longitudinal magnetic field can be generated according to production requirements, thereby overcoming the limitation that traditional magnetic field heat treatment furnaces can only provide a single-directional magnetic field, so that the workpiece to be processed is magnetized in a more complex magnetic field environment, effectively improving the optimization space of the performance of the workpiece to be processed; the loading and unloading device 200 includes a material rack assembly 210 and a conveying assembly 220, and the conveying assembly 220 enables the material rack assembly 210 to move between the loading station and the opening of the furnace body 100, thereby simplifying the loading and unloading process, making the loading and unloading process more simple and efficient, and is particularly suitable for large-scale industrial production, significantly improving production efficiency.

[0078] For example, in this embodiment, taking the example of only providing the second magnetic field generating device 500 on the material rack assembly 210, the structure of the magnetic field heat treatment furnace is described in detail.

[0079] Alternatively, if Figure 2As shown, the transport assembly 220 includes a first material moving assembly 221 and a second material moving assembly 222. The first material moving assembly 221 includes a first slide rail 2211, a loading and unloading trolley 2212 and a first driving member 2213. The first slide rail 2211 is arranged below the furnace body 100 along the second direction. The loading station is located at an end of the first slide rail 2211 away from the furnace body 100. The second material moving assembly 222 is located at an end of the first slide rail 2211 close to the furnace body 100 and at the furnace body 100. Directly below the opening of the body 100, the loading and unloading trolley 2212 is slidably connected to the first slide rail 2211, the material rack assembly 210 is arranged on the loading and unloading trolley 2212, the first driving member 2213 is used to drive the loading and unloading trolley 2212 carrying the material rack assembly 210 to move along the first slide rail 2211, so as to move the material rack assembly 210 from the loading station to directly below the opening, and the second material moving assembly 222 is used to drive the material rack assembly 210 to move from directly below the opening to the opening. The first material moving assembly 221 and the second material moving assembly 222 respectively control the material rack assembly 210 to move horizontally (move in the second direction) and vertically (move in the first direction), so that the loading and lifting process are carried out in an orderly manner, thereby improving the efficiency of the entire heat treatment process.

[0080] Optionally, the first driving member 2213 includes a first driving motor, a driving pulley, a driven pulley and a transmission belt. Two parallel wheel axles are provided at the bottom of the loading and unloading trolley 2212. First rollers 22121 are provided at both ends of each wheel axle. The first rollers 22121 are rollingly connected to the first slide rail 2211. The first driving motor is arranged on the chassis of the loading and unloading trolley 2212. The driven pulley is coaxially fixed with the wheel axle. The driving pulley is coaxially fixed with the output shaft of the first driving motor. The transmission belt is wound around the outer circumference of the driving pulley and the driven pulley and is tensioned. The driving pulley is connected to the driven pulley through the transmission belt, and then the loading and unloading trolley 2212 can be driven to move in the second direction through the first driving motor.

[0081] Alternatively, if Figure 2 As shown, in this embodiment, two second material moving assemblies 222 are provided, and the two second material moving assemblies 222 are respectively located on both sides of the material rack assembly 210, so that the force of the material rack 212 is balanced during the lifting process. The second material moving assembly 222 includes a second slide rail 2221, a second driving member 2222 and a bracket 2223, the second slide rail 2221 is arranged below the furnace body 100 along the first direction, the bracket 2223 is slidably connected with the second slide rail 2221, and the second driving member 2222 drives the bracket 2223 to rise or fall along the second slide rail 2221 along the first direction.

[0082] Alternatively, if Figure 2As shown, the second driving member 2222 includes a second driving motor 22221, a lead screw 22222 and a nut, the nut is arranged on the bracket 2223, the nut is threadedly connected to the lead screw 22222, the second driving member 2222 is in transmission connection with the lead screw 22222, and the bracket 2223 can be driven to rise or fall by the second driving motor 22221. In this embodiment, the nut is made of tin-phosphor bronze or other materials with self-lubricating function, which can play a role of lubrication and anti-friction during work, and prevents jamming. In other embodiments, the second driving member 2222 can be a cylinder.

[0083] Furthermore, a second roller 22233 is provided at one end of the bracket 2223 that is slidably connected to the second slide rail 2221. The second roller 22233 is rollingly connected to the second slide rail 2221, which can reduce the resistance of the bracket 2223 when it moves up and down, so that the bracket 2223 can move more smoothly during the up and down movement.

[0084] Optionally, a spring 22232 and a support plate 22231 are provided on the bracket 2223, one end of the spring 22232 is connected to the support plate 22231, and the other end is connected to the bracket 2223. When lifting the rack assembly 210, the support plate 22231 first contacts the rack assembly 210. With the help of the shock-absorbing effect of the spring 22232, the impact force on the rack assembly 210 can be reduced.

[0085] Optionally, the magnetic field heat treatment furnace further includes a locking device 300, the material rack assembly 210 includes a material receiving furnace platform 211 and a material rack 212, the material receiving furnace platform 211 is placed on the loading and unloading trolley 2212, the material rack 212 is arranged on the material receiving furnace platform 211, the second magnetic field generating device 500 and / or the third magnetic field generating device 600 are arranged on the material rack 212, the material receiving furnace platform 211 can be sealed at the opening, and the locking device 300 is used to limit the material receiving furnace platform 211 from escaping from the opening, so that the material receiving furnace platform 211 serves as the furnace door of the furnace body 100. The material receiving furnace platform 211 is not only used to carry the material rack 212, but also serves as the furnace door when it is lifted to the opening of the furnace body 100. The dual-function design improves the space utilization and structural compactness of the system, while ensuring the sealing effect of the furnace body 100, preventing the leakage of heat and magnetic field during the heat treatment process, and improving the stability of the process and the energy utilization efficiency.

[0086] Alternatively, if Figure 3 and Figure 5As shown, the second magnetic field generating device 500 includes a plurality of first material string rods 510, a plurality of first positioning fixtures 520 and at least two first lead copper bars 530. The material rack 212 is provided with a plurality of first jacks extending along the first direction, and the first end of a first material string rod 510 is inserted into a first jack; string rod holes are respectively provided at both ends of the first positioning fixture 520, and the two string rod holes are sleeved on the second ends of two adjacent first material string holes, so that the plurality of first material string rods 510 are connected in series, and the two first lead copper bars 530 are arranged at intervals on the material receiving furnace platform 211, and the two first lead copper bars 530 are respectively electrically connected to the material rack 212, so that the plurality of first material string rods 510 connected in series form a first closed loop, and after power is turned on, a stable and uniform longitudinal magnetic field is generated. It can be understood that in this embodiment, the first ends of the multiple first material string rods 510 are electrically connected through the mounting surface of the material rack 212, and the second ends of the multiple first material string rods 510 are electrically connected through the first positioning fixture 520. The first positioning fixture 520 plays the role of circuit connection and can ensure the verticality of the first material string rod 510, ensuring that the first material string rod 510 is more stable, thereby improving the quality of the processed workpiece after processing.

[0087] For example, the second magnetic field generating device 500 includes four first material stringing rods 510 and two first positioning fixtures 520, and the material rack 212 is provided with four first plug holes. The assembly position of the first positioning fixture 520 is described in detail. Among them, the first end of each first material stringing rod 510 is inserted into the first plug hole corresponding thereto, the second end of the first first material stringing rod 510 and the second end of the second first material stringing rod 510 are respectively inserted into the two material stringing holes on one first positioning fixture 520, and the second end of the third first material stringing rod 510 and the second end of the fourth first material stringing rod 510 are respectively inserted into the two material stringing holes on another first positioning fixture 520, thereby forming a first closed loop, and the workpiece to be processed on the first material stringing rod 510 is magnetized after power is turned on.

[0088] Alternatively, if Figure 5 As shown, a ventilation hole 521 is provided in the middle of the first positioning fixture 520. It is helpful for the convection of hot and cold airflows inside the furnace body 100 during the heat treatment process, improves the uniformity of the furnace temperature, and reduces the heat capacity of the rack 212 itself, preventing the magnetic field unevenness caused by local excessive temperature, ensuring the stability and uniformity of the longitudinal magnetic field, thereby improving the magnetic properties and processing quality of the workpiece to be processed. In this embodiment, the ventilation hole 521 passes through the first positioning fixture 520 along the first direction, ensuring the smooth flow of hot and cold airflows in the furnace body 100, accelerating the airflow circulation in the furnace, effectively balancing the temperature distribution in the furnace, and preventing local overheating.

[0089] Optionally, a first end of the first material stringing rod 510 is provided with a first plug-in portion 511, a second end of the first material stringing rod 510 is provided with a second plug-in portion 512, a first material stringing area 513 is provided between the first plug-in portion 511 and the second plug-in portion 512, the first material stringing area 513 is used to be inserted into the workpiece to be processed, the first plug-in portion 511 is plugged into the first plug hole, and the second plug-in portion 512 is plugged into the string rod hole. The installation and disassembly process of the material stringing rod is simplified. The operator only needs to insert the first plug-in portion 511 and the second plug-in portion 512 into the corresponding plug hole and string rod hole respectively to complete the installation, without the need for additional fixing devices, thereby improving the convenience of loading and unloading and reducing the difficulty of operation.

[0090] Optionally, a hollow structure 2122 is provided in the middle of the material rack 212, and the hollow structure 2122 penetrates the material rack 212 along the first direction to facilitate the passage of heating and temperature measuring elements, thereby directly contacting or approaching the workpiece to be processed, making temperature monitoring more accurate, helping to ensure that the material always remains within the optimal temperature range during the heat treatment process, and further improving the controllability of the process.

[0091] Optionally, the material rack 212 can be detachably mounted on the material receiving furnace platform 211, and at least two lifting ears 2123 are provided on the circumference of the material rack 212, and the two lifting ears 2123 are arranged opposite to each other along the circumferential direction of the material rack 212; in this embodiment, four lifting ears 2123 are welded on the circumference of the material rack 212 at intervals, which is convenient for overall lifting using a crane. In other embodiments, the number of lifting ears 2123 can be set according to actual needs.

[0092] Optionally, a plurality of support rods 2111 are provided on the material receiving furnace table 211, and a plurality of assembly holes 21211 are provided on the material rack 212 corresponding to the support rods 2111. The ends of the support rods 2111 can be inserted into the assembly holes 21211 corresponding thereto. The design of the support rods 2111 and the assembly holes 21211 enables the material rack 212 to be quickly and conveniently installed and disassembled. The operator only needs to insert the support rods 2111 into the assembly holes 21211 to complete the assembly and fixation of the material rack 212, without the need for complex tools or additional fixing devices, thereby simplifying the operation steps and improving work efficiency. In this embodiment, four support rods 2111 are provided on the material receiving furnace table 211, and four assembly holes 21211 are provided on the material rack 212. The support rods 2111 are inserted into the assembly holes 21211 corresponding thereto one by one.

[0093] Alternatively, if Figure 6As shown, the furnace body 100 includes a furnace chamber 110, a heating layer 120, a magnetizing layer 130, a heat-insulating layer 140 and a shell 150 from the inside to the outside, refractory materials are arranged between adjacent layers, a heating element is arranged in the heating layer 120, and a first magnetic field generating device 400 is arranged in the magnetizing layer 130. In this embodiment, the heating element is a resistance heating belt, which is arranged in an annular manner in the heating layer 120 inside the furnace, which can avoid the disadvantage that the heating wire is easily oxidized.

[0094] Optionally, in this embodiment, the furnace body 100 uses low-carbon steel as the material of the shell 150. When the magnetic field is passed, a closed magnetic circuit can be formed to extend the length of the uniform magnetic field in the furnace and shield the magnetic field in the furnace from leaking outward.

[0095] In this embodiment, the main body of the first magnetic field generating device 400 is a solenoid 410, which is arranged in the magnetizing layer 130 of the furnace body 100 and is made of multiple layers of copper tubes. After power is turned on, the solenoid 410 generates a stable and uniform magnetic field.

[0096] Alternatively, if Figure 1 and Figure 7 As shown, the magnetic field heat treatment furnace includes a fixing frame 330, the furnace body 100 is arranged on the fixing frame 330, and a plurality of locking matching blocks 160 are arranged in the circumferential direction of the opening at the lower end of the furnace body 100, and the locking matching blocks 160 are provided with through holes, and each locking matching block 160 corresponds to a locking device 300; the locking device 300 includes a locking cylinder 310 and a locking rod 320, the cylinder body of the locking cylinder 310 is horizontally rotatably connected to the fixing frame 330, and one end of the locking rod 320 is connected to the locking cylinder 3 The piston rod of 10 is rotatably connected, and the other end is slidably inserted into the through hole, and the locking rod 320 is driven to extend by the locking cylinder 310, which can drive the locking rod 320 to support the material receiving furnace table 211, thereby locking the material receiving furnace table 211 at the opening of the furnace body 100; when the locking cylinder 310 drives the locking rod 320 to retract, it can drive the locking rod 320 to avoid the downward moving position of the material receiving furnace table 211, so that the material receiving furnace table 211 can be unlocked from the opening of the furnace body 100.

[0097] Alternatively, if Figure 8As shown, the magnetic field heat treatment furnace in this embodiment also includes a temperature control device 700, and the temperature control device 700 includes a wire temperature thermocouple group 710, a temperature control thermocouple group 720 and a material temperature thermocouple group 730. The wire temperature thermocouple group 710 is located in the furnace body 100, and is divided into three parts: upper, middle and lower, for monitoring the actual heating temperature of the upper, middle and lower parts of the heating element; the temperature control thermocouple group 720 is located at the center of the table top of the material receiving furnace table 211, including three detection rods with increasing heights in sequence, for monitoring the actual temperature of the upper, middle and lower parts of the furnace during operation; the material temperature thermocouple group 730 is led out from the center of the surface of the material receiving furnace table 211, and there are three rods in total, which can be placed arbitrarily within the limited range of movement. For example, the material temperature thermocouple group 730 can be clamped between the workpieces to be processed to monitor the actual temperature between the workpieces during operation.

[0098] Alternatively, if Fig. 9 As shown, the furnace body 100 is connected to the vacuum mechanical pump 810 outside the furnace body 100 through the vacuum pipeline 800, and the air in the furnace is extracted through the vacuum mechanical pump 810 to keep the furnace in a high vacuum state before starting the hot work. The protective atmosphere pipeline introduces protective gas into the furnace after the furnace is in a high vacuum state to create a protective atmosphere; in this embodiment, the protective atmosphere pipeline 900 is divided into a large flow pipeline 910 and a small flow pipeline 920, each of which is controlled by a flow solenoid valve 930. The protective gas is quickly introduced through the large flow pipeline 910 to quickly change the negative pressure in the furnace to a positive pressure. After the hot processing starts, the protective gas is slowly introduced through the small flow pipeline 920 to maintain the atmosphere and furnace pressure in the furnace, and the intake flow rate can be adjusted through the flow solenoid valve 930.

[0099] Optionally, the furnace body 100 is also connected to a furnace body 100 pressure relief pipeline 1000, which is controlled by a pressure relief solenoid valve 1001. When the processing is completed, the pressure relief solenoid valve 1001 drives the pipeline to open, and the gas in the furnace is discharged, so that the pressure in the furnace is quickly relieved to the point where the material can be discharged.

[0100] Alternatively, if Figure 8 As shown, a pressure regulating pipeline 1100 is provided on the material receiving furnace table 211, and an exhaust valve 1102 and a process pressure regulating valve 1101 are provided on the pressure regulating pipeline 1100. The process pressure regulating valve 1101 starts to regulate the pressure after the start of hot processing. When the pressure in the furnace is too high, the exhaust is slowly discharged to the outside through the exhaust valve 1102. When the pressure in the furnace is too low, the process pressure regulating valve 1101 does not work.

[0101] Alternatively, if Fig.10As shown, the magnetic field heat treatment furnace also includes a heat circulation fan 1200, a cooling fan 1300, a hot fan 1400 and a cold fan 1500. The motors of the heat circulation fan 1200 and the cooling fan 1300 are located outside the furnace body 100, the hot fan 1400 and the cold fan 1500 are located in the furnace chamber, and the water-cooled heat exchange tank 1600 is located outside the furnace body 100. Copper pipes are used for water circulation, and together with the hot and cold fans, the temperature in the furnace is accurately and effectively controlled and key working components are cooled.

[0102] Optionally, the magnetic field heat treatment furnace also includes a compressed air pipeline (not shown in the figure), which is connected to the locking cylinder 310 and other power components that require an air source to provide driving force for the operation of the locking cylinder 310 and other components.

[0103] Alternatively, if Fig.10 As shown, the magnetic field heat treatment furnace also includes an electric cabinet 1700, which is electrically connected to the second magnetic field generating device 500 and / or the second magnetic field generating device 500 to provide power to the first magnetic field generating device 400 and / or the second magnetic field generating device 500.

[0104] Optionally, the magnetic field heat treatment furnace further includes a human-computer interaction system, which is built into a computer and performs human-computer interaction with the magnetic field heat treatment furnace via the computer.

[0105] Embodiment 2

[0106] like Figure 11-Figure 12As shown, this embodiment provides a magnetic field heat treatment furnace, which is basically the same as the first embodiment, and the difference from the first embodiment is that only a third magnetic field generating device 600 is arranged on the bracket, and the third magnetic field generating device 600 includes a fixed plate 650, a base 610, an extension seat 620, a second string rod 630 and at least a second lead copper bar 640, the fixed plate 650 is limited on the material rack 212, and two bases 610 are relatively arranged on the fixed plate 650 along the second direction, and each base 610 can be stacked with a plurality of extension seats 620 in sequence, and between the base 610 and the extension seat 620, and between two adjacent extension seats A second plug hole 613 is provided between the extension seat 620, and a plurality of second plug holes 613 are arranged at intervals along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other; the two ends of the second material string rod 630 can be respectively inserted into the two second plug holes 613 opposite to each other along the second direction, and the plurality of second material string rods 630 are connected in parallel; two second lead copper bars 640 are arranged at intervals on the material receiving furnace platform 211, and the two second lead copper bars 640 are respectively electrically connected to the material rack 212, so that the plurality of second material string rods 630 connected in parallel form a second closed loop, and a stable and uniform transverse magnetic field is formed after power is turned on. The modular design of the base 610 and the extension seat 620 can conveniently expand and adjust the transverse magnetic field generation device. This extensibility can adapt to different processing requirements by increasing or reducing the number of the extension seat 620 and the second material string rod 630 without changing the main structure. It should be noted that in this embodiment, the second material string rod 630 and the first material string rod 510 are the same component, which can reduce the number of parts and further save costs.

[0107] Optionally, the base 610 and the fixing plate 650 are integrally formed, which can reduce production costs and save assembly time. In other embodiments, the base 610 can be connected to the fixing plate 650 by welding.

[0108] Alternatively, if Fig.12 As shown, a plurality of first semicircular grooves 611 are provided at intervals along the third direction on the base 610, and a plurality of second semicircular grooves 621 are provided at intervals along the third direction on the extension seat 620. The first semicircular grooves 611 and the second semicircular grooves 621 are arranged relative to each other to enclose and form a second plug hole 613, and two opposite second semicircular grooves 621 can enclose and form a second plug hole 613. By providing the second plug hole 613, it can be ensured that each second string rod 630 can be accurately inserted into the designated position, reduce the deviation during the insertion process, and improve the assembly accuracy and consistency of the entire third magnetic field generating device 600. It can be understood that when the first extension seat 620 is stacked on the base 610, the first semicircular groove 611 on the base 610 and the second semicircular groove 621 on the extension seat 620 are opposite and enclose the second plug hole 613. When another extension seat 620 is stacked on the extension seat 620 again, the two opposite second semicircular grooves 621 on the two adjacent extension seats 620 enclose and form a second plug hole 613.

[0109] Optionally, a plurality of positioning rods 2121 are provided at intervals in the circumferential direction of the material rack 212, and a plurality of opening grooves 651 are provided in the circumferential direction of the fixed plate 650. The positioning rods 2121 are clamped in the corresponding opening grooves 651. The structure in which the positioning rods 2121 cooperate with the opening grooves 651 can limit the rotation of the fixed plate 650 relative to the material rack 212, so as to ensure the stability of the base 610 on the fixed plate 650 and improve the magnetization accuracy.

[0110] Optionally, an assembly hole 21211 is provided in the positioning rod 2121, and a connecting portion 622 is provided on the extension seat 620. A mounting boss 6221 is provided on one side of the connecting portion 622, and a mounting groove 6222 is provided on the other side. The mounting boss 6221 can be inserted into the mounting hole 21211 or the mounting groove 6222. It is understandable that when the first extension seat 620 is stacked on the base 610, the first extension seat 620 is inserted into the assembly hole 21211 through the mounting boss 6221. When the extension seat 620 is stacked again on the extension seat 620, the mounting boss 6221 of the latter extension seat 620 is inserted into the mounting groove 6222 on the former extension seat 620, thereby ensuring the precise docking between the multiple extension seats 620 and improving the assembly efficiency of the third magnetic field generating device 600.

[0111] Alternatively, if Fig.12 and Fig.13 As shown, the base 610 is provided with a first positioning groove 612, the extension seat 620 is provided with a first positioning protrusion 623 on one side, and a second positioning groove 624 on the other side, and the first positioning protrusion 623 can be inserted into the first positioning groove 612 or inserted into the second positioning groove 624. It can be understood that the first positioning protrusion 623 on the first extension seat 620 placed on the base 610 is inserted into the first positioning groove 612, and in the extension seat 620 stacked again, the first positioning protrusion 623 of the latter extension seat 620 is inserted into the second positioning groove 624 on the former extension seat 620, so as to locate the assembly position of the extension seat 620.

[0112] Embodiment 3

[0113] The present embodiment provides a magnetic field heat treatment furnace, which is basically the same as the first embodiment, and differs from the first embodiment in that a second magnetic field generating device 500 and a third magnetic field generating device 600 are simultaneously provided on the material rack 212, the second magnetic field generating device 500 carries the workpiece to be processed placed along the first direction, and applies a longitudinal magnetic field to the workpiece to be processed placed along the first direction, the third magnetic field generating device 600 carries the workpiece to be processed placed along the second direction, and applies a longitudinal magnetic field to the workpiece to be processed placed along the second direction; the first magnetic field generating device 400 applies a transverse magnetic field to the workpiece to be processed placed along the first direction, and the first magnetic field generating device 400 applies a longitudinal magnetic field to the workpiece to be processed placed along the second direction. Therefore, according to the actual production process, the first magnetic field generating device 400 is turned on, and / or the second magnetic field generating device 500 is turned on, and / or the third magnetic field generating device 600 is turned on, so as to realize all-round magnetic field treatment of the workpiece to be processed, thereby improving the processing quality of the workpiece to be processed.

[0114] Embodiment 4

[0115] like Fig.14 As shown, the magnetic field heat treatment method is applied to the magnetic field heat treatment furnace in any of the above embodiments, and the magnetic field heat treatment method includes:

[0116] Control the rack assembly 210 carrying the workpiece to be processed to move to the opening of the furnace body 100, and lock the rack assembly 210 on the furnace body 100;

[0117] The furnace body 100 is controlled to operate according to a preset processing process and a magnetization process, and the magnetization process includes applying a first magnetic field, and / or applying a second magnetic field, and / or applying a third magnetic field.

[0118] The magnetic field heat treatment method provided in this embodiment allows the user to selectively apply the first magnetic field, the second magnetic field and the third magnetic field according to actual production needs, thereby realizing customized processing of the workpiece to be processed and meeting the production needs of different materials and processes.

[0119] Optionally, a lifting station is provided directly below the opening of the furnace body 100, a first proximity switch is provided at the loading station, a second proximity switch is provided at the lifting station, and a third proximity switch is provided at the opening of the furnace body 100, and controlling the material rack assembly 210 carrying the workpiece to be processed to move to the opening of the furnace body 100 includes:

[0120] Control the transport assembly 220 to move the rack assembly 210 to the loading station, trigger the first proximity switch, stop the transport assembly 220, and stack the workpieces to be processed on the rack assembly 210;

[0121] Control the transport assembly 220 to move the rack assembly 210 from the loading station to the lifting station, trigger the second proximity switch, and stop the transport assembly 220;

[0122] The transport assembly 220 is controlled to move the rack assembly 210 to the opening of the furnace body 100 , triggering the third proximity switch, the transport assembly 220 stops moving, and then the locking device 300 is controlled to lock the rack assembly 210 on the furnace body 100 .

[0123] By setting a plurality of proximity switches, the movement of the rack assembly 210 between various workstations can be accurately controlled to avoid mechanical interference during the process of loading, lifting and final docking with the furnace body 100, and ensure the smooth connection between various operation steps.

[0124] Optionally, a heating layer 120 is provided in the furnace body 100, and the heating layer 120 is provided with a heating element. The processing technology includes:

[0125] The furnace body 100 is evacuated, and after the pressure in the furnace body 100 becomes a preset negative pressure value, a protective gas is introduced into the furnace body 100 to change the negative pressure in the furnace body 100 to a positive pressure; the introduction of the protective gas can prevent oxidation of the workpiece to be processed, improve the surface quality of the workpiece, and reduce the subsequent workload of cleaning the surface of the workpiece to be processed.

[0126] The heating element is controlled to start working, and the temperature of the heating element, the temperature in the furnace body 100, and the temperature of the workpiece to be processed are monitored in real time. By real-time monitoring and precise temperature control, rework or scrap rate caused by improper temperature control can be avoided, thereby improving production efficiency and the output rate of processed parts.

[0127] Optionally, the magnetization process includes simultaneously turning on the first magnetic field generating device 400, the second magnetic field generating device 500 and the third magnetic field generating device 600;

[0128] The first magnetic field generating device 400 applies a first magnetic field to the workpiece to be processed placed along the first direction, and the second magnetic field generating device 500 applies a second magnetic field to the workpiece to be processed placed along the first direction. The workpiece to be processed is affected by the magnetic field in both the axial and radial directions, which is equivalent to the workpiece to be processed being affected by both the transverse magnetic field and the longitudinal magnetic field. The workpiece to be processed is affected by a composite magnetic field. And / or,

[0129] The first magnetic field generating device 400 applies a first magnetic field to the workpiece to be processed placed along the second direction, and the third magnetic field generating device 600 applies a third magnetic field to the workpiece to be processed placed along the second direction. The workpiece to be processed is affected by the magnetic field only in the axial direction, which is equivalent to the workpiece to be processed being affected by the longitudinal magnetic field.

[0130] It should be noted that, according to the electromagnetic principle, the second magnetic field generating device 500 only has a magnetic field effect on the workpiece to be processed in the first closed loop, and has no magnetic field effect on the workpiece to be processed in the second closed loop; the third magnetic field generating device 600 only has a magnetic field effect on the workpiece to be processed in the second closed loop, and has no magnetic field effect on the workpiece to be processed in the first closed loop; that is to say, the first magnetic field generating device 400 only has a magnetic field effect on the workpiece placed along the first direction, and has no effect on the workpiece to be processed placed along the second direction; the third magnetic field generating device 600 only has a magnetic field effect on the workpiece to be processed placed along the second direction, and has no effect on the workpiece to be processed placed along the first direction. Therefore, there are only the above two situations when the first magnetic field generating device 400, the second magnetic field generating device 500, and the third magnetic field generating device 600 are turned on at the same time.

[0131] For example, taking the workpiece to be processed as a ring-like workpiece as an example, the magnetic field heat treatment method is described in detail:

[0132] Step 1: Control the first material moving component 221 to move the material rack component 210 to the loading station, trigger the first proximity switch, the first material moving component 221 stops moving, and the ring-like workpiece to be processed is strung on the material rack 212 through the first stringing rod 510 (at this time, the first stringing rod 510 is arranged on the material rack 212 along the first direction), and is electrically connected to the material rack 212 and the first lead copper bus 530 through the first positioning fixture 520; and / or, the ring-like workpiece to be processed is strung on the material rack 212 through the second stringing rod 630 12 (at this time, the second material string rod 630 is set on the material rack 212 along the second direction); after the material is discharged, the conveying assembly 220 is controlled to move the material rack assembly 210 from the loading station to the lifting station, triggering the second proximity switch, and the conveying assembly 220 stops moving; then the conveying assembly 220 is controlled to move the material rack assembly 210 to the opening of the furnace body 100, triggering the third proximity switch, the conveying assembly 220 stops moving, and finally the locking device 300 is controlled to lock the material rack assembly 210 on the furnace body 100.

[0133] Step 2: After setting the heat treatment process parameters (such as heating / holding time, temperature of each working section, heating / cooling rate, etc.) and magnetization parameters (such as selecting the opening and closing of each magnetization device, magnetic field application logic, magnetic field application intensity, etc.) in the human-computer interaction system (computer), the magnetic field heat treatment furnace is automatically operated to perform the preset process through the main console operation panel on the furnace body 100.

[0134] Step 3: The magnetic field heat treatment furnace starts to operate, the vacuum mechanical pump 810 starts to work, the vacuum degree in the furnace increases, and when the pressure in the furnace becomes a preset negative pressure value, the vacuum mechanical pump 810 stops working;

[0135] Then, the electromagnetic valve controls the large flow pipeline 910 to quickly introduce the protective gas, so that the pressure in the furnace quickly changes from negative pressure to positive pressure; at this time, the temperature rise process begins, and the heating elements in the heating layer 120 of the furnace body 100 assembly start to work; the wire temperature thermocouple group 710, the temperature control thermocouple group 720, and the material temperature thermal resistor monitor the temperature in real time, and provide real-time feedback through the human-computer interaction system;

[0136] In addition, the heat circulation fan 1200 is started to ensure a uniform temperature field in the furnace and consistency of the convection heating process; the water-cooled heat exchange tank 1600 circulates water through copper pipes to complete the hot and cold cycle exchange and ensure the safe and stable operation of key working components in the furnace (such as the energized solenoid 410).

[0137] Step 4: After the processing is completed, the first material moving component 221 and the second material moving component 222 are controlled by the main console operation panel to remove the receiving furnace table 211 and the material rack 212 from the furnace body 100 and move them to the material discharge station to remove the processed ring-like workpiece.

[0138] For example, according to the magnetization requirement, each magnetic field generating device generates a stable and uniform magnetic field. According to the position of the processed ring-like workpiece and the different opening and closing states of the selected magnetic field generating device, the magnetic field conditions to which the ring-like workpiece is subjected are shown in Table 1 below:

[0139]

[0140] In Table 1, the longitudinal material stringing means that the ring-like workpiece is passed through the first material stringing rod 510 arranged along the first direction, and the transverse material stringing means that the ring-like workpiece is passed through the second material stringing rod 630 arranged along the second direction.

[0141] It can be seen from the data in Table 1 that the first magnetic field generating device 400 can cause the ring-like workpiece placed along the first direction to be subjected to the transverse magnetic field (the ring-like workpiece is subjected to the magnetic field in the radial direction), and the first magnetic field generating device 400 can cause the ring-like workpiece placed along the second direction to be subjected to the longitudinal magnetic field (the ring-like workpiece is subjected to the magnetic field in the axial direction); the second magnetic field generating device 500 can cause the ring-like workpiece placed along the first direction to be subjected to the longitudinal magnetic field, and has no effect on the ring-like workpiece placed along the second direction; the third magnetic field generating device 600 has no effect on the ring-like workpiece placed along the first direction, but can cause the ring-like workpiece placed along the second direction to be subjected to the longitudinal magnetic field; therefore, the magnetic field heat treatment method in this embodiment selectively turns on or off the first magnetic field generating device 400, the second magnetic field generating device 500 and the third magnetic field generating device 600, so that the ring-like workpiece can be subjected to the transverse magnetic field, the longitudinal magnetic field or the composite magnetic field according to the process requirements, thereby realizing precise control and optimization of material properties.

[0142] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A magnetic field heat treatment furnace, characterized in that: include: A furnace body (100), wherein an opening is provided at the bottom of the furnace body (100), and a first magnetic field generating device (400) is provided in the furnace body (100), and the first magnetic field generating device (400) can generate a first magnetic field; A loading and unloading device (200) comprises a material rack assembly (210) and a transport assembly (220), wherein the transport assembly (220) is located below the furnace body (100) and is used to drive the material rack assembly (210) to move between a loading station and an opening of the furnace body (100); the material rack assembly (210) comprises a material receiving furnace platform (211) and a material rack (212); The rack assembly (210) is provided with a second magnetic field generating device (500) and a third magnetic field generating device (600), the second magnetic field generating device (500) can generate a second magnetic field, and the second magnetic field generating device (500) can carry a workpiece to be processed placed along a first direction; the third magnetic field generating device (600) can generate a third magnetic field, and the third magnetic field generating device (600) can carry the workpiece to be processed placed along a second direction, the first direction is perpendicular to the second direction, and the magnetic field directions of the second magnetic field and the third magnetic field are perpendicular; The third magnetic field generating device (600) comprises: a fixed plate (650) and two bases (610), wherein the fixed plate (650) is limited to the material rack (212), and the two bases (610) are arranged on the fixed plate (650) along the second direction and opposite to each other; an extension seat (620), wherein each of the bases (610) can sequentially stack a plurality of the extension seats (620), and a second plug hole (613) is arranged between the base (610) and the extension seat (620), and between two adjacent extension seats (620), and the plurality of the second plug holes (613) Arranged at intervals along the third direction; a second material stringing rod (630), the second material stringing rod (630) is inserted into the workpiece to be processed, and the two ends of the second material stringing rod (630) can be respectively inserted into two second plug holes (613) opposite to each other along the second direction, and a plurality of second material stringing rods (630) are connected in parallel; at least two second lead copper bars (640) are arranged at intervals on the material receiving furnace table (211), and the two second lead copper bars (640) are respectively electrically connected to the material rack (212), so that the plurality of second material stringing rods (630) connected in parallel form a second closed loop.

2. The magnetic field heat treatment furnace according to claim 1, characterized in that: The transport assembly (220) comprises a first material moving assembly (221) and a second material moving assembly (222), wherein the first material moving assembly (221) comprises: A first slide rail (2211) is arranged below the furnace body (100) along the second direction, the loading station is located at an end of the first slide rail (2211) away from the furnace body (100), and the second material moving assembly (222) is located at an end of the first slide rail (2211) close to the furnace body (100) and directly below the opening; A loading and unloading trolley (2212) is slidably connected to the first slide rail (2211), and the rack assembly (210) is arranged on the loading and unloading trolley (2212); The first driving member (2213) is used to drive the loading and unloading trolley (2212) carrying the material rack assembly (210) to move along the first slide rail (2211) to move the material rack assembly (210) from the loading station to directly below the opening, and the second material moving assembly (222) is used to drive the material rack assembly (210) to move from directly below the opening to the opening.

3. The magnetic field heat treatment furnace according to claim 2, characterized in that: The magnetic field heat treatment furnace further comprises a locking device (300), and the rack assembly (210) comprises: A material receiving furnace platform (211), wherein the material receiving furnace platform (211) is placed on the loading and unloading trolley (2212); A material rack (212), the material rack (212) is arranged on the material receiving furnace platform (211), the second magnetic field generating device (500) and / or the third magnetic field generating device (600) are arranged on the material rack (212), the material receiving furnace platform (211) can be sealed in the opening, and the locking device (300) is used to limit the material receiving furnace platform (211) from escaping from the opening, so that the material receiving furnace platform (211) serves as the furnace door of the furnace body (100).

4. The magnetic field heat treatment furnace according to claim 3, characterized in that: The second magnetic field generating device (500) comprises: A plurality of first material stringing rods (510), the material rack (212) being provided with a plurality of first insertion holes, the first end of one of the first material stringing rods (510) being inserted into one of the first insertion holes; A plurality of first positioning fixtures (520), wherein two ends of the first positioning fixtures (520) are respectively provided with string rod holes, and two of the string rod holes are sleeved on the second ends of two adjacent first string rods (510), so that the plurality of first string rods (510) are connected in series; At least two first lead copper bars (530) are arranged at intervals on the material receiving furnace platform (211) and are electrically connected to the material rack (212), so that a plurality of first material string rods (510) connected in series form a first closed loop.

5. The magnetic field heat treatment furnace according to claim 4, characterized in that: A ventilation hole (521) is provided in the middle of the first positioning tool (520).

6. The magnetic field heat treatment furnace according to claim 3, characterized in that: A hollow structure (2122) is provided in the middle of the material rack (212), and the hollow structure (2122) penetrates the material rack (212) along the first direction.

7. The magnetic field heat treatment furnace according to claim 1, characterized in that: The base (610) is provided with a plurality of first semicircular grooves (611) at intervals along the third direction, and the extension seat (620) is provided with a plurality of second semicircular grooves (621) at intervals along the third direction. The first semicircular grooves (611) and the second semicircular grooves (621) are arranged opposite to each other to surround and form the second insertion hole (613), and two opposite second semicircular grooves (621) can surround and form the second insertion hole (613).

8. The magnetic field heat treatment furnace according to claim 1, characterized in that: The material rack (212) is provided with a plurality of positioning rods (2121) at intervals in the circumferential direction, and the fixing plate (650) is provided with a plurality of opening grooves (651) in the circumferential direction, and the positioning rods (2121) are clamped in the corresponding opening grooves (651).

9. The magnetic field heat treatment furnace according to claim 8, characterized in that: An assembly hole (21211) is provided in the positioning rod (2121), a connecting portion (622) is provided on the extension seat (620), an assembly boss (6221) is provided on one side of the connecting portion (622), and an assembly groove (6222) is provided on the other side, and the assembly boss (6221) can be inserted into the assembly hole (21211) or the assembly groove (6222).

10. The magnetic field heat treatment furnace according to claim 1, characterized in that: The base (610) is provided with a first positioning groove (612), one side of the extension seat (620) is provided with a first positioning protrusion (623), and the other side is provided with a second positioning groove (624), and the first positioning protrusion (623) can be inserted into the first positioning groove (612) or inserted into the second positioning groove (624).

11. The magnetic field heat treatment furnace according to claim 9, characterized in that: A plurality of support rods (2111) are provided on the material receiving furnace platform (211), and the support rods (2111) can be inserted into the corresponding assembly holes (21211).

12. A magnetic field heat treatment method, applied to a magnetic field heat treatment furnace as claimed in any one of claims 1 to 11, characterized in that: The magnetic field heat treatment method comprises: Controlling a material rack assembly (210) carrying the workpiece to be processed to move to the opening of the furnace body (100), and locking the material rack assembly (210) on the furnace body (100); The furnace body (100) is controlled to operate according to a preset magnetization process, wherein the magnetization process includes applying a first magnetic field, and / or applying a second magnetic field, and / or applying a third magnetic field.

13. The magnetic field heat treatment method according to claim 12, characterized in that: The magnetization process includes simultaneously turning on a first magnetic field generating device (400), a second magnetic field generating device (500) and a third magnetic field generating device (600): The first magnetic field generating device (400) applies a first magnetic field to the workpiece to be processed placed along a first direction, and the second magnetic field generating device (500) applies a second magnetic field to the workpiece to be processed placed along the first direction, and the workpiece to be processed is acted upon by the magnetic field in both the axial and radial directions; and / or, The first magnetic field generating device (400) applies a first magnetic field to the workpiece to be processed placed along the second direction, and the third magnetic field generating device (600) applies a third magnetic field to the workpiece to be processed placed along the second direction, and the workpiece to be processed is acted upon by the magnetic field in the axial direction.

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