Self-adaptive control system and method for neodymium iron boron sheet production

Abstract

The invention discloses a self-adaptive control system and method for neodymium-iron-boron sheet production, and relates to the technical field of material preparation and processing.The self-adaptive control system comprises a smelting analysis module, a rotating speed analysis module, an iron-boron alloy powder particle analysis module, a sintering temperature and duration analysis module, a neodymium-iron-boron sheet quality analysis module and a database; according to the method, various historical customer orders are combined, the appropriate smelting temperature and duration of the customer orders and the viscosity of neodymium iron boron alloy liquid based on the customer orders are obtained through analysis, the rotating speed of a melt-spinning machine is analyzed, parameters such as pressing pressure, sintering temperature and duration are determined according to the granularity of neodymium iron boron alloy powder, and finally the quality of the neodymium iron boron sheet is analyzed. And due to high intelligence and automation, the production efficiency is greatly improved, and the quality and consistency of products are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of material preparation and processing, and in particular to an adaptive control system and method for producing NdFeB thin sheets. Background Art

[0002] With the continuous development of the global economy and the accelerated advancement of scientific and technological progress, the demand for high-performance permanent magnetic materials continues to grow. Especially driven by emerging industries such as new energy vehicles, wind power generation, and intelligent manufacturing, the market demand for NdFeB thin sheets has shown a rapid growth trend. This growth trend not only provides a broad development space for NdFeB thin sheet manufacturers, but also promotes the rapid development of the entire rare earth permanent magnetic material industry. As a type of rare earth permanent magnetic material, NdFeB permanent magnetic material has extremely high magnetic energy product and coercive force. Its unique crystal structure and magnetic properties make NdFeB thin sheets a key raw material for the production of high-performance permanent magnets. Therefore, an adaptive control system and method for the production of NdFeB thin sheets is particularly important.

[0003] The existing adaptive control system for NdFeB sheet production still has the following defects, which are specifically reflected in: 1. In the existing adaptive control system for NdFeB sheet production, little attention is paid to the air flow velocity of the air flow mill, which significantly affects the uniformity of the particle size of the NdFeB alloy powder. The uneven particle size distribution may lead to insufficient sintering in local areas, affecting the overall performance of the NdFeB sheet, thereby reducing the qualified rate of the NdFeB sheet and increasing the scrap rate and losses in the production process.

[0004] 2. In the existing adaptive control system for NdFeB sheet production, little attention is paid to the sintering temperature and duration of NdFeB sheets. Excessively high sintering temperature and excessively long sintering time will lead to abnormal grain growth of NdFeB magnetic materials. Grain growth will cause aggravated lattice distortion and may produce residual gas, which will significantly reduce the magnetic properties. Excessively low sintering temperature and excessively short sintering time will lead to insufficient connection between powder particles, which will lead to insufficient density of NdFeB sheets and a large number of pores inside the material, thereby reducing its magnetic and mechanical properties, resulting in product performance failing to meet design requirements, while increasing scrap rate and rework rate, thereby increasing energy consumption and reducing production efficiency. Summary of the invention

[0005] The purpose of the present invention is to provide an adaptive control system and method for producing NdFeB thin sheets, which solves the problems existing in the background technology.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: The present invention provides an adaptive control system and method for the production of NdFeB sheets, including: a smelting analysis module, which is used to extract the required magnetic property coefficient of NdFeB sheets of customer orders, and based on each historical customer order in the database, evaluate the similarity coefficient of the magnetic property coefficient of the NdFeB sheets of the customer order and each historical customer order, so as to obtain the appropriate smelting temperature and duration of the customer order.

[0007] The speed analysis module obtains the NdFeB alloy liquid ordered by the customer through smelting, obtains the viscosity of the NdFeB alloy liquid ordered by the customer, and then evaluates the similarity between the viscosity of the NdFeB alloy liquid of the customer order and each historical customer order, and then obtains the appropriate speed of the belt spinning machine for the customer order, and obtains each NdFeB alloy sheet ordered by the customer after the belt spinning machine.

[0008] The NdFeB alloy powder particle analysis module is used to hydrogen crush each NdFeB alloy flake ordered by the customer to obtain the NdFeB alloy coarse powder ordered by the customer, obtain the particle size of the NdFeB alloy coarse powder ordered by the customer, obtain the appropriate air flow velocity of the air flow mill for the NdFeB alloy coarse powder ordered by the customer, obtain the NdFeB alloy fine powder ordered by the customer through air flow milling, obtain the particle size of the NdFeB alloy fine powder ordered by the customer, compare the particle size of the NdFeB alloy fine powder ordered by the customer with each particle size range stored in the database, screen and obtain the appropriate pressing pressure of the NdFeB alloy fine powder ordered by the customer, and obtain each NdFeB flake ordered by the customer after pressing.

[0009] The sintering temperature and duration analysis module is used to extract the particle size of the NdFeB alloy fine powder ordered by the customer, combine the historical customer orders, obtain the appropriate sintering temperature and duration of the NdFeB sheets ordered by the customer, and sinter the NdFeB sheets ordered by the customer.

[0010] The NdFeB sheet quality analysis module is used to obtain the thickness, length and width of each NdFeB sheet ordered by the customer, evaluate the dimensional accuracy of each NdFeB sheet ordered by the customer, obtain the density and hardness of each NdFeB sheet ordered by the customer, evaluate the quality coefficient of each NdFeB sheet ordered by the customer, screen out the abnormal NdFeB sheets ordered by the customer, and remelt the abnormal NdFeB sheets ordered by the customer.

[0011] The database is used to store the particle size ranges of NdFeB alloy fine powder and historical customer orders.

[0012] Preferably, the similarity coefficient between the magnetic performance coefficient of the NdFeB sheet of the customer order and each historical customer order is evaluated by a specific analysis method: comparing the required magnetic performance coefficient of the NdFeB sheet of the customer order with the magnetic performance coefficient of the NdFeB sheet of each historical customer order, evaluating the similarity coefficient of the magnetic performance coefficient of the NdFeB sheet of the customer order and each historical customer order, and the calculation formula is, ,in The similarity coefficient between the magnetic properties of the NdFeB sheet of the customer order and the mth historical customer order, Indicates the required magnetic properties coefficient of the NdFeB sheet ordered by the customer, represents the magnetic property coefficient of the NdFeB thin film of the mth historical customer order, m represents the number of each historical customer order, , n is a positive integer greater than 2, and e represents a natural constant.

[0013] Preferably, the appropriate smelting temperature and duration for obtaining the customer order are specifically analyzed by the following method: The similarity coefficients of the magnetic properties coefficients of NdFeB sheets of the customer order and each historical customer order are compared with each other. If the similarity coefficient of the magnetic properties coefficients of NdFeB sheets of the customer order and a certain historical customer order is the largest, the smelting temperature and duration of the historical order with the largest similarity coefficient are obtained and used as the appropriate smelting temperature and duration of the customer order.

[0014] Preferably, the appropriate speed of the belt spinning machine for the customer order is specifically analyzed by: based on the viscosity of the NdFeB alloy liquid in the customer order, the similarity between the viscosity of the NdFeB alloy liquid in the customer order and that of each historical customer order is evaluated, and the calculation formula is: in Indicates the similarity of the viscosity of the NdFeB alloy liquid between the customer order and the mth historical customer order, Indicates the viscosity of the NdFeB alloy liquid ordered by the customer. Represents the viscosity of the NdFeB alloy liquid of the mth historical customer order.

[0015] The similarity coefficients of the viscosity of the NdFeB alloy liquid of the customer order and each historical customer order are compared with each other. If the similarity coefficient of the viscosity of the NdFeB alloy liquid of the customer order and a certain historical customer order is the largest, the rotational speed of the belt-spinning machine of the historical order with the largest similarity coefficient is obtained and used as the appropriate rotational speed of the belt-spinning machine for the customer order.

[0016] Preferably, the specific analysis method for the suitable air flow velocity of the air flow mill of the NdFeB alloy coarse powder of the customer order is: obtaining each historical customer order from the database, summarizing the particle size range of each NdFeB alloy coarse powder based on the particle size of the NdFeB alloy coarse powder of each historical customer order, and averaging the air flow velocity of each air flow mill within the particle size range of each NdFeB alloy coarse powder to obtain the suitable air flow velocity of the air flow mill corresponding to the particle size range of each NdFeB alloy coarse powder, and based on the particle size of the NdFeB alloy coarse powder of the customer order, obtain the suitable air flow velocity of the air flow mill for the NdFeB alloy coarse powder of the customer order.

[0017] Preferably, the specific analysis method for obtaining the suitable sintering temperature and time of the NdFeB thin sheets ordered by the customer is as follows: obtain the particle size of the NdFeB alloy fine powder ordered by the customer, obtain each historical customer order from the database, and based on the particle size of the NdFeB alloy fine powder of each historical customer order, summarize the particle size range of each NdFeB alloy powder, and average the sintering temperatures and sintering times within the particle size range of each NdFeB alloy powder to obtain the suitable sintering temperature and time corresponding to the particle size range of each NdFeB alloy fine powder, and based on the particle size of the NdFeB alloy fine powder ordered by the customer, obtain the suitable sintering temperature and time of the NdFeB thin sheets ordered by the customer.

[0018] Preferably, the dimensional accuracy of each NdFeB sheet ordered by the customer is evaluated by a specific analysis method as follows: Compare the thickness of each NdFeB sheet with the thickness of the NdFeB sheet ordered by the customer, compare the length of each NdFeB sheet with the length of the NdFeB sheet ordered by the customer, and compare the width of each NdFeB sheet with the width of the NdFeB sheet ordered by the customer to evaluate the dimensional accuracy of each NdFeB sheet ordered by the customer. The calculation formula is, ,in Indicates the dimensional accuracy of the pth NdFeB sheet, represents the thickness of the pth NdFeB sheet, Indicates the thickness of the NdFeB sheet ordered by the customer. represents the length of the pth NdFeB sheet, Indicates the length of the NdFeB sheet ordered by the customer. represents the width of the pth NdFeB sheet, It indicates the width of the NdFeB sheet ordered by the customer, and p indicates the serial number of each NdFeB sheet. , q is a positive integer greater than 2.

[0019] Preferably, the quality coefficient of each NdFeB sheet ordered by the customer is evaluated by a specific analysis method: The density of each NdFeB sheet is compared with the density of the NdFeB sheet ordered by the customer, and the hardness of each NdFeB sheet is compared with the hardness of the NdFeB sheet ordered by the customer, and then the quality coefficient of each NdFeB sheet ordered by the customer is evaluated. The calculation formula is, ,in represents the mass coefficient of the pth NdFeB sheet, represents the density of the pth NdFeB sheet, Indicates the density of the NdFeB sheet ordered by the customer, represents the hardness of the pth NdFeB thin film, Indicates the hardness of the NdFeB sheet ordered by the customer.

[0020] Preferably, the specific analysis method of each abnormal NdFeB sheet ordered by the customer is: based on the dimensional accuracy and quality coefficient of each NdFeB sheet ordered by the customer, the comprehensive quality coefficient of each NdFeB sheet ordered by the customer is evaluated, and the calculation formula is: ,in Represents the comprehensive quality coefficient of the pth NdFeB thin film.

[0021] The comprehensive quality coefficient of each NdFeB thin film ordered by the customer is compared with the preset threshold value of the comprehensive quality coefficient of the NdFeB thin film. If the comprehensive quality coefficient of a certain NdFeB thin film is lower than the preset threshold value of the comprehensive quality coefficient of the NdFeB thin film, the NdFeB thin film is recorded as an abnormal NdFeB thin film, and the abnormal NdFeB thin films ordered by the customer are obtained.

[0022] A second aspect of the present invention provides a method for an adaptive control system for producing NdFeB thin sheets, comprising: Step 1: Melting analysis is used to extract the required magnetic property coefficient of NdFeB sheets of customer orders. Based on the historical customer orders in the database, the similarity coefficient of the magnetic property coefficient of NdFeB sheets of customer orders and each historical customer order is evaluated, so as to obtain the appropriate melting temperature and duration of the customer order.

[0023] Step 2: Speed ​​analysis: After smelting, the NdFeB alloy liquid ordered by the customer is obtained, and the viscosity of the NdFeB alloy liquid ordered by the customer is obtained, and then the similarity between the viscosity of the NdFeB alloy liquid ordered by the customer and that of each historical customer order is evaluated, and then the appropriate speed of the belt spinning machine for the customer order is obtained, and each NdFeB alloy sheet ordered by the customer is obtained after the belt spinning machine.

[0024] Step three, NdFeB alloy powder particle analysis, used to hydrogen crush each NdFeB alloy flakes ordered by the customer, to obtain the NdFeB alloy coarse powder ordered by the customer, to obtain the particle size of the NdFeB alloy coarse powder ordered by the customer, to obtain the appropriate air flow velocity of the air flow mill for the NdFeB alloy coarse powder ordered by the customer, to obtain the NdFeB alloy fine powder ordered by the customer through air flow milling, to obtain the particle size of the NdFeB alloy fine powder ordered by the customer, to compare the particle size of the NdFeB alloy fine powder ordered by the customer with each particle size range stored in the database, to screen out the appropriate pressing pressure of the NdFeB alloy fine powder ordered by the customer, and to obtain each NdFeB flake ordered by the customer after pressing.

[0025] Step 4: Sintering temperature and duration analysis is used to extract the particle size of the NdFeB alloy fine powder ordered by the customer, and combine the historical customer orders to obtain the appropriate sintering temperature and duration of the NdFeB thin sheets ordered by the customer, and sinter each NdFeB thin sheet ordered by the customer.

[0026] Step 5: NdFeB sheet quality analysis is used to obtain the thickness, length and width of each NdFeB sheet ordered by the customer, evaluate the dimensional accuracy of each NdFeB sheet ordered by the customer, obtain the density and hardness of each NdFeB sheet ordered by the customer, evaluate the quality coefficient of each NdFeB sheet ordered by the customer, screen out each abnormal NdFeB sheet ordered by the customer, and remelt each abnormal NdFeB sheet ordered by the customer.

[0027] The beneficial effects of the present invention are: 1. In the present invention, the attention paid to the air flow velocity of the air flow mill is increased, thereby improving the uniformity of the particle size of the NdFeB alloy powder. The powder with uniform particle size helps to form a finer and more uniform grain structure during the sintering process, thereby improving the residual magnetization and coercive force of the magnet, helping to improve the magnetic properties of the NdFeB sheet, and helping to form a more uniform and dense microstructure during the sintering process, reducing the generation of pores and defects.

[0028] 2. In the present invention, more attention is paid to the sintering temperature and duration of NdFeB sheets. Appropriate sintering temperature promotes the fusion and densification of powder particles, reduces pores and defects, optimizes the microstructure, and thus improves the bonding force between NdFeB powders, reduces grain size, and increases grain boundary area, thereby improving magnetic properties and thus improving the production efficiency of NdFeB sheets. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 This is a schematic diagram of the connection of the system modules of the present invention.

[0031] Figure 2 The present invention is a schematic flow chart of the steps for implementing the method. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Reference Figure 1 As shown, the present invention provides an adaptive control system for NdFeB sheet production, including: a smelting analysis module, a rotation speed analysis module, a NdFeB alloy powder particle analysis module, a sintering temperature and time analysis module, a NdFeB sheet quality analysis module and a database.

[0034] The smelting analysis module is used to extract the required magnetic property coefficient of the NdFeB sheet of the customer order, and based on the historical customer orders in the database, evaluate the similarity coefficient of the magnetic property coefficient of the NdFeB sheet of the customer order and each historical customer order, and then obtain the appropriate smelting temperature and duration of the customer order.

[0035] It should be noted that historical customer orders should record the magnetic properties coefficient of NdFeB sheets and the smelting temperature and duration.

[0036] In a specific embodiment, the similarity coefficient of the magnetic performance coefficient of the NdFeB sheet of the customer order and each historical customer order is evaluated by a specific analysis method: the required magnetic performance coefficient of the NdFeB sheet of the customer order is compared with the magnetic performance coefficient of the NdFeB sheet of each historical customer order, and the similarity coefficient of the magnetic performance coefficient of the NdFeB sheet of the customer order and each historical customer order is evaluated. The calculation formula is: ,in The similarity coefficient between the magnetic properties of the NdFeB sheet of the customer order and the mth historical customer order, Indicates the required magnetic properties coefficient of the NdFeB sheet ordered by the customer, represents the magnetic property coefficient of the NdFeB thin film of the mth historical customer order, m represents the number of each historical customer order, , n is a positive integer greater than 2, and e represents a natural constant.

[0037] In a specific embodiment, the appropriate smelting temperature and duration of the customer order are obtained by a specific analysis method: the similarity coefficient of the magnetic property coefficient of the NdFeB sheet of the customer order is compared with that of each historical customer order; if the similarity coefficient of the magnetic property coefficient of the NdFeB sheet of the customer order and a certain historical customer order is the largest, the smelting temperature and duration of the historical order with the largest similarity coefficient are obtained, and used as the appropriate smelting temperature and duration of the customer order.

[0038] The speed analysis module obtains the NdFeB alloy liquid ordered by the customer through smelting, obtains the viscosity of the NdFeB alloy liquid ordered by the customer, and then evaluates the similarity between the viscosity of the NdFeB alloy liquid of the customer order and each historical customer order, and then obtains the appropriate speed of the belt spinning machine for the customer order, and obtains each NdFeB alloy sheet ordered by the customer after the belt spinning machine.

[0039] It should be noted that a high temperature rotational viscometer is used to obtain the viscosity of the NdFeB alloy liquid in customer orders. Historical customer orders should record the viscosity of the NdFeB alloy liquid and the rotation speed of the belt spinning machine.

[0040] In a specific embodiment, the appropriate speed of the belt spinning machine of the customer order is specifically analyzed by: based on the viscosity of the NdFeB alloy liquid of the customer order, the similarity of the viscosity of the NdFeB alloy liquid of the customer order and each historical customer order is evaluated, and the calculation formula is: in Indicates the similarity of the viscosity of the NdFeB alloy liquid between the customer order and the mth historical customer order, Indicates the viscosity of the NdFeB alloy liquid ordered by the customer. Represents the viscosity of the NdFeB alloy liquid of the mth historical customer order.

[0041] The similarity coefficients of the viscosity of the NdFeB alloy liquid of the customer order and each historical customer order are compared with each other. If the similarity coefficient of the viscosity of the NdFeB alloy liquid of the customer order and a certain historical customer order is the largest, the rotational speed of the belt-spinning machine of the historical order with the largest similarity coefficient is obtained and used as the appropriate rotational speed of the belt-spinning machine for the customer order.

[0042] The NdFeB alloy powder particle analysis module is used to hydrogen crush each NdFeB alloy flake ordered by the customer to obtain the NdFeB alloy coarse powder ordered by the customer, obtain the particle size of the NdFeB alloy coarse powder ordered by the customer, obtain the appropriate air flow velocity of the air flow mill for the NdFeB alloy coarse powder ordered by the customer, obtain the NdFeB alloy fine powder ordered by the customer through air flow milling, obtain the particle size of the NdFeB alloy fine powder ordered by the customer, compare the particle size of the NdFeB alloy fine powder ordered by the customer with each particle size range stored in the database, screen and obtain the appropriate pressing pressure of the NdFeB alloy fine powder ordered by the customer, and obtain each NdFeB flake ordered by the customer after pressing.

[0043] In the present invention, the attention paid to the air flow velocity of the air flow mill is increased, thereby improving the uniformity of the particle size of the NdFeB alloy powder. The powder with uniform particle size helps to form a finer and more uniform grain structure during the sintering process, thereby improving the residual magnetization and coercive force of the magnet, helping to improve the magnetic properties of the NdFeB thin sheets, and helping to form a more uniform and dense microstructure during the sintering process, reducing the generation of pores and defects.

[0044] It should be noted that the laser particle size analyzer can be used to obtain the particle size of the NdFeB alloy coarse powder ordered by the customer and the particle size of the NdFeB alloy fine powder ordered by the customer.

[0045] In a specific embodiment, the specific analysis method for the suitable air flow velocity of the air flow mill of the NdFeB alloy coarse powder ordered by the customer is as follows: each historical customer order is obtained from a database, and based on the particle size of the NdFeB alloy coarse powder of each historical customer order, the particle size range of each NdFeB alloy coarse powder is summarized, and the air flow velocity of each air flow mill within the particle size range of each NdFeB alloy coarse powder is averaged to obtain the suitable air flow velocity of the air flow mill corresponding to the particle size range of each NdFeB alloy coarse powder, and based on the particle size of the NdFeB alloy coarse powder of the customer order, the suitable air flow velocity of the air flow mill of the NdFeB alloy coarse powder ordered by the customer is obtained.

[0046] It should be noted that historical customer orders should record the particle size of the NdFeB alloy coarse powder.

[0047] The sintering temperature and duration analysis module is used to extract the particle size of the NdFeB alloy fine powder ordered by the customer, combine the historical customer orders, obtain the appropriate sintering temperature and duration of the NdFeB sheets ordered by the customer, and sinter the NdFeB sheets ordered by the customer.

[0048] In the present invention, attention is paid to the sintering temperature and duration of NdFeB sheets. Appropriate sintering temperature promotes the fusion and densification of powder particles, reduces pores and defects, optimizes the microstructure, and thereby improves the bonding force between NdFeB powders, reduces the grain size, and increases the grain boundary area, thereby improving the magnetic properties and further improving the production efficiency of NdFeB sheets.

[0049] It should be noted that historical customer orders should record the particle size of NdFeB alloy fine powder. In a specific embodiment, the specific analysis method for obtaining the suitable sintering temperature and time of the NdFeB thin sheets ordered by the customer is as follows: obtaining the particle size of the NdFeB alloy fine powder ordered by the customer, obtaining each historical customer order from a database, and summarizing the particle size range of each NdFeB alloy powder based on the particle size of the NdFeB alloy fine powder of each historical customer order, and performing mean processing on the sintering temperatures and sintering times within the particle size range of each NdFeB alloy powder to obtain the suitable sintering temperature and time corresponding to the particle size range of each NdFeB alloy fine powder, and obtaining the suitable sintering temperature and time of the NdFeB thin sheets ordered by the customer based on the particle size of the NdFeB alloy fine powder of the customer order.

[0050] The NdFeB sheet quality analysis module is used to obtain the thickness, length and width of each NdFeB sheet ordered by the customer, evaluate the dimensional accuracy of each NdFeB sheet ordered by the customer, obtain the density and hardness of each NdFeB sheet ordered by the customer, evaluate the quality coefficient of each NdFeB sheet ordered by the customer, screen out the abnormal NdFeB sheets ordered by the customer, and remelt the abnormal NdFeB sheets ordered by the customer.

[0051] It should be noted that the thickness, length and width of each NdFeB sheet ordered by the customer are obtained through infrared scanning measurement, and the mass of each NdFeB sheet ordered by the customer is obtained using an electronic scale. The volume of each NdFeB sheet ordered by the customer is calculated based on the thickness, length and width of each NdFeB sheet ordered by the customer, and the density formula is used to obtain the density of each NdFeB sheet ordered by the customer. A hardness tester is used to obtain the hardness of each NdFeB sheet ordered by the customer.

[0052] In a specific embodiment, the dimensional accuracy of each NdFeB sheet ordered by the customer is evaluated by a specific analysis method: the thickness of each NdFeB sheet is compared with the thickness of the NdFeB sheet ordered by the customer, the length of each NdFeB sheet is compared with the length of the NdFeB sheet ordered by the customer, and the width of each NdFeB sheet is compared with the width of the NdFeB sheet ordered by the customer, and the dimensional accuracy of each NdFeB sheet ordered by the customer is evaluated, and the calculation formula is, ,in Indicates the dimensional accuracy of the pth NdFeB sheet, represents the thickness of the pth NdFeB sheet, Indicates the thickness of the NdFeB sheet ordered by the customer. represents the length of the pth NdFeB sheet, Indicates the length of the NdFeB sheet ordered by the customer. represents the width of the pth NdFeB sheet, It indicates the width of the NdFeB sheet ordered by the customer, and p indicates the serial number of each NdFeB sheet. , q is a positive integer greater than 2.

[0053] In a specific embodiment, the quality coefficient of each NdFeB sheet ordered by the customer is evaluated by a specific analysis method: the density of each NdFeB sheet is compared with the density of the NdFeB sheet ordered by the customer, and the hardness of each NdFeB sheet is compared with the hardness of the NdFeB sheet ordered by the customer, and then the quality coefficient of each NdFeB sheet ordered by the customer is evaluated, and the calculation formula is, ,in represents the mass coefficient of the pth NdFeB sheet, represents the density of the pth NdFeB sheet, Indicates the density of the NdFeB sheet ordered by the customer, represents the hardness of the pth NdFeB thin film, Indicates the hardness of the NdFeB sheet ordered by the customer.

[0054] In a specific embodiment, the specific analysis method of obtaining each abnormal NdFeB sheet ordered by the customer is: based on the dimensional accuracy and quality coefficient of each NdFeB sheet ordered by the customer, the comprehensive quality coefficient of each NdFeB sheet ordered by the customer is evaluated, and the calculation formula is: ,in Represents the comprehensive quality coefficient of the pth NdFeB thin film.

[0055] The comprehensive quality coefficient of each NdFeB thin film ordered by the customer is compared with the preset threshold value of the comprehensive quality coefficient of the NdFeB thin film. If the comprehensive quality coefficient of a certain NdFeB thin film is lower than the preset threshold value of the comprehensive quality coefficient of the NdFeB thin film, the NdFeB thin film is recorded as an abnormal NdFeB thin film, and the abnormal NdFeB thin films ordered by the customer are obtained.

[0056] The database is used to store the particle size ranges of NdFeB alloy fine powder and historical customer orders.

[0057] The smelting analysis module is connected to the speed analysis module, the speed analysis module is connected to the NdFeB alloy powder particle analysis module, the FeB alloy powder particle analysis module is connected to the sintering temperature and time analysis module, the sintering temperature and time analysis module is connected to the NdFeB sheet quality analysis module, the smelting analysis module, the speed analysis module, the FeB alloy powder particle analysis module, the sintering temperature and time analysis module, and the NdFeB sheet quality analysis module are connected to the database at the same time.

[0058] refer to Figure 2 The second aspect of the present invention provides a method for an adaptive control system for the production of NdFeB thin sheets, comprising: Step 1: Melting analysis is used to extract the required magnetic property coefficient of NdFeB sheets of customer orders. Based on the historical customer orders in the database, the similarity coefficient of the magnetic property coefficient of NdFeB sheets of customer orders and each historical customer order is evaluated, so as to obtain the appropriate melting temperature and duration of the customer order.

[0059] Step 2: Speed ​​analysis: After smelting, the NdFeB alloy liquid ordered by the customer is obtained, and the viscosity of the NdFeB alloy liquid ordered by the customer is obtained, and then the similarity between the viscosity of the NdFeB alloy liquid ordered by the customer and that of each historical customer order is evaluated, and then the appropriate speed of the belt spinning machine for the customer order is obtained, and each NdFeB alloy sheet ordered by the customer is obtained after the belt spinning machine.

[0060] Step three, NdFeB alloy powder particle analysis, used to hydrogen crush each NdFeB alloy flakes ordered by the customer, to obtain the NdFeB alloy coarse powder ordered by the customer, to obtain the particle size of the NdFeB alloy coarse powder ordered by the customer, to obtain the appropriate air flow velocity of the air flow mill for the NdFeB alloy coarse powder ordered by the customer, to obtain the NdFeB alloy fine powder ordered by the customer through air flow milling, to obtain the particle size of the NdFeB alloy fine powder ordered by the customer, to compare the particle size of the NdFeB alloy fine powder ordered by the customer with each particle size range stored in the database, to screen out the appropriate pressing pressure of the NdFeB alloy fine powder ordered by the customer, and to obtain each NdFeB flake ordered by the customer after pressing.

[0061] Step 4: Sintering temperature and duration analysis is used to extract the particle size of the NdFeB alloy fine powder ordered by the customer, and combine the historical customer orders to obtain the appropriate sintering temperature and duration of the NdFeB thin sheets ordered by the customer, and sinter each NdFeB thin sheet ordered by the customer.

[0062] Step 5: NdFeB sheet quality analysis is used to obtain the thickness, length and width of each NdFeB sheet ordered by the customer, evaluate the dimensional accuracy of each NdFeB sheet ordered by the customer, obtain the density and hardness of each NdFeB sheet ordered by the customer, evaluate the quality coefficient of each NdFeB sheet ordered by the customer, screen out each abnormal NdFeB sheet ordered by the customer, and remelt each abnormal NdFeB sheet ordered by the customer.

[0063] The above contents are merely examples and explanations of the concept of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the present invention, they should all fall within the protection scope of the present invention.

Claims

1. An adaptive control system for the production of NdFeB thin films, characterized in that: include: The smelting analysis module is used to extract the required magnetic property coefficient of the NdFeB sheet of the customer order, and based on the historical customer orders in the database, evaluate the similarity coefficient of the magnetic property coefficient of the NdFeB sheet of the customer order and each historical customer order, and then obtain the appropriate smelting temperature and duration of the customer order; The speed analysis module obtains the NdFeB alloy liquid ordered by the customer through smelting, obtains the viscosity of the NdFeB alloy liquid ordered by the customer, and then evaluates the similarity between the viscosity of the NdFeB alloy liquid ordered by the customer and that of each historical customer order, and then obtains the appropriate speed of the belt-spinning machine for the customer order, and obtains each NdFeB alloy sheet ordered by the customer after the belt-spinning machine; NdFeB alloy powder particle analysis module, used for hydrogen crushing each NdFeB alloy flake ordered by the customer, obtaining the NdFeB alloy coarse powder ordered by the customer, obtaining the particle size of the NdFeB alloy coarse powder ordered by the customer, obtaining the appropriate air flow velocity of the air flow mill for the NdFeB alloy coarse powder ordered by the customer, obtaining the NdFeB alloy fine powder ordered by the customer through air flow milling, obtaining the particle size of the NdFeB alloy fine powder ordered by the customer, comparing the particle size of the NdFeB alloy fine powder ordered by the customer with each particle size interval stored in the database, screening and obtaining the appropriate pressing pressure of the NdFeB alloy fine powder ordered by the customer, and obtaining each NdFeB flake ordered by the customer after pressing; The sintering temperature and duration analysis module is used to extract the particle size of the NdFeB alloy fine powder ordered by the customer, and combine the historical customer orders to obtain the appropriate sintering temperature and duration of the NdFeB thin sheets ordered by the customer, and sinter each NdFeB thin sheet ordered by the customer; The NdFeB sheet quality analysis module is used to obtain the thickness, length and width of each NdFeB sheet ordered by the customer, evaluate the dimensional accuracy of each NdFeB sheet ordered by the customer, obtain the density and hardness of each NdFeB sheet ordered by the customer, evaluate the quality coefficient of each NdFeB sheet ordered by the customer, screen out each abnormal NdFeB sheet ordered by the customer, and remelt each abnormal NdFeB sheet ordered by the customer; The database is used to store the particle size ranges of NdFeB alloy fine powder and historical customer orders.

2. The adaptive control system for producing NdFeB thin sheets according to claim 1, characterized in that: The specific analysis method for evaluating the similarity coefficient of the magnetic performance coefficient of the NdFeB thin film between the customer order and each historical customer order is as follows: Compare the required magnetic property coefficient of NdFeB sheets in customer orders with the magnetic property coefficient of NdFeB sheets in each historical customer order, and evaluate the similarity coefficient of the magnetic property coefficient of NdFeB sheets in customer orders and each historical customer order. The calculation formula is: ,in The similarity coefficient between the magnetic properties of the NdFeB sheet of the customer order and the mth historical customer order, Indicates the required magnetic properties coefficient of the NdFeB sheet ordered by the customer, represents the magnetic property coefficient of the NdFeB thin film of the mth historical customer order, m represents the number of each historical customer order, , n is a positive integer greater than 2, and e represents a natural constant.

3. The adaptive control system for producing NdFeB thin sheets according to claim 2, characterized in that: The specific analysis method for obtaining the appropriate melting temperature and duration for the customer order is as follows: The similarity coefficients of the magnetic properties coefficients of NdFeB sheets of the customer order and each historical customer order are compared with each other. If the similarity coefficient of the magnetic properties coefficients of NdFeB sheets of the customer order and a certain historical customer order is the largest, the smelting temperature and duration of the historical order with the largest similarity coefficient are obtained and used as the appropriate smelting temperature and duration of the customer order.

4. The adaptive control system for producing NdFeB thin sheets according to claim 1, characterized in that: The specific analysis method for the suitable belt-spinning machine speed for the customer order is as follows: Based on the viscosity of the NdFeB alloy liquid in the customer order, the similarity between the viscosity of the NdFeB alloy liquid in the customer order and that of each historical customer order is evaluated. The calculation formula is: in Indicates the similarity of the viscosity of the NdFeB alloy liquid between the customer order and the mth historical customer order, Indicates the viscosity of the NdFeB alloy liquid ordered by the customer. Indicates the viscosity of the NdFeB alloy liquid of the mth historical customer order; The similarity coefficients of the viscosity of the NdFeB alloy liquid of the customer order and each historical customer order are compared with each other. If the similarity coefficient of the viscosity of the NdFeB alloy liquid of the customer order and a certain historical customer order is the largest, the rotational speed of the belt-spinning machine of the historical order with the largest similarity coefficient is obtained and used as the appropriate rotational speed of the belt-spinning machine for the customer order.

5. The adaptive control system for producing NdFeB thin sheets according to claim 4, characterized in that: The specific analysis method for the suitable air flow velocity of the jet mill for the NdFeB alloy coarse powder ordered by the customer is as follows: Historical customer orders are obtained from the database, and based on the particle size of the NdFeB alloy coarse powder of each historical customer order, the particle size range of each NdFeB alloy coarse powder is summarized, and the air flow velocity of each air flow mill within the particle size range of each NdFeB alloy coarse powder is averaged to obtain the appropriate air flow velocity of the air flow mill corresponding to the particle size range of each NdFeB alloy coarse powder, and based on the particle size of the NdFeB alloy coarse powder in the customer order, the appropriate air flow velocity of the air flow mill for the NdFeB alloy coarse powder in the customer order is obtained.

6. The adaptive control system for producing NdFeB thin sheets according to claim 5, characterized in that: The specific analysis method for the suitable sintering temperature and duration of the NdFeB sheet ordered by the customer is as follows: Obtain the particle size of the NdFeB alloy fine powder ordered by the customer, obtain each historical customer order from the database, and based on the particle size of the NdFeB alloy fine powder of each historical customer order, summarize the particle size range of each NdFeB alloy powder, and average the sintering temperatures and sintering times within the particle size range of each NdFeB alloy powder to obtain the appropriate sintering temperature and time corresponding to the particle size range of each NdFeB alloy fine powder. Based on the particle size of the NdFeB alloy fine powder ordered by the customer, obtain the appropriate sintering temperature and time of the NdFeB sheet ordered by the customer.

7. The adaptive control system for producing NdFeB thin sheets according to claim 1, characterized in that: The specific analysis method for evaluating the dimensional accuracy of each NdFeB sheet ordered by the customer is as follows: Compare the thickness of each NdFeB sheet with the thickness of the NdFeB sheet ordered by the customer, compare the length of each NdFeB sheet with the length of the NdFeB sheet ordered by the customer, and compare the width of each NdFeB sheet with the width of the NdFeB sheet ordered by the customer to evaluate the dimensional accuracy of each NdFeB sheet ordered by the customer. The calculation formula is, ,in Indicates the dimensional accuracy of the pth NdFeB sheet, represents the thickness of the pth NdFeB sheet, Indicates the thickness of the NdFeB sheet ordered by the customer. represents the length of the pth NdFeB sheet, Indicates the length of the NdFeB sheet ordered by the customer. represents the width of the pth NdFeB thin film, It indicates the width of the NdFeB sheet ordered by the customer, and p indicates the serial number of each NdFeB sheet. , q is a positive integer greater than 2.

8. The adaptive control system for producing NdFeB thin sheets according to claim 7, characterized in that: The specific analysis method for evaluating the quality coefficient of each NdFeB sheet ordered by the customer is as follows: The density of each NdFeB sheet is compared with the density of the NdFeB sheet ordered by the customer, and the hardness of each NdFeB sheet is compared with the hardness of the NdFeB sheet ordered by the customer, and then the quality coefficient of each NdFeB sheet ordered by the customer is evaluated. The calculation formula is, ,in represents the mass coefficient of the pth NdFeB sheet, represents the density of the pth NdFeB sheet, Indicates the density of the NdFeB sheet ordered by the customer, represents the hardness of the pth NdFeB thin film, Indicates the hardness of the NdFeB sheet ordered by the customer.

9. An adaptive control system for the production of NdFeB thin sheets according to claim 8, characterized in that: The specific analysis method of each abnormal NdFeB sheet ordered by the customer is as follows: Based on the dimensional accuracy and quality coefficient of each NdFeB sheet ordered by the customer, the comprehensive quality coefficient of each NdFeB sheet ordered by the customer is evaluated. The calculation formula is: ,in represents the comprehensive quality coefficient of the pth NdFeB thin film; The comprehensive quality coefficient of each NdFeB thin film ordered by the customer is compared with the preset threshold value of the comprehensive quality coefficient of the NdFeB thin film. If the comprehensive quality coefficient of a certain NdFeB thin film is lower than the preset threshold value of the comprehensive quality coefficient of the NdFeB thin film, the NdFeB thin film is recorded as an abnormal NdFeB thin film, and the abnormal NdFeB thin films ordered by the customer are obtained.

10. A method for implementing an adaptive control system for producing NdFeB thin sheets as claimed in claims 1 to 9, characterized in that: include: Step 1: Smelting analysis is used to extract the required magnetic property coefficient of the NdFeB sheet of the customer order. Based on each historical customer order in the database, the similarity coefficient of the magnetic property coefficient of the NdFeB sheet of the customer order and each historical customer order is evaluated, so as to obtain the appropriate smelting temperature and duration of the customer order. Step 2: Speed ​​analysis: After smelting, obtain the NdFeB alloy liquid ordered by the customer, obtain the viscosity of the NdFeB alloy liquid ordered by the customer, and then evaluate the similarity between the viscosity of the NdFeB alloy liquid ordered by the customer and that of each historical customer order, and then obtain the appropriate speed of the belt-spinning machine for the customer order, and obtain each NdFeB alloy sheet ordered by the customer after the belt-spinning machine; Step 3: NdFeB alloy powder particle analysis, which is used to hydrogen crush each NdFeB alloy flake of the customer's order to obtain the NdFeB alloy coarse powder of the customer's order, obtain the particle size of the NdFeB alloy coarse powder of the customer's order, obtain the appropriate air flow velocity of the air flow mill for the NdFeB alloy coarse powder of the customer's order, obtain the NdFeB alloy fine powder of the customer's order through air flow milling, obtain the particle size of the NdFeB alloy fine powder of the customer's order, compare the particle size of the NdFeB alloy fine powder of the customer's order with each particle size interval stored in the database, screen and obtain the appropriate pressing pressure of the NdFeB alloy fine powder of the customer's order, and obtain each NdFeB flake of the customer's order after pressing; Step 4: Sintering temperature and duration analysis, used to extract the particle size of the NdFeB alloy fine powder ordered by the customer, and combine the historical customer orders to obtain the appropriate sintering temperature and duration of the NdFeB thin sheets ordered by the customer, and sinter each NdFeB thin sheet ordered by the customer; Step 5: NdFeB sheet quality analysis is used to obtain the thickness, length and width of each NdFeB sheet ordered by the customer, evaluate the dimensional accuracy of each NdFeB sheet ordered by the customer, obtain the density and hardness of each NdFeB sheet ordered by the customer, evaluate the quality coefficient of each NdFeB sheet ordered by the customer, screen out each abnormal NdFeB sheet ordered by the customer, and remelt each abnormal NdFeB sheet ordered by the customer.

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