A method and system for injection of magnetic powder for activity enhancement and uniformity modification

Abstract

The present application relates to the technical field of magnetic powder modification, and a method and system for improving and uniformly modifying injection magnetic powder, comprising: calculating a set of grinding index interval change rates corresponding to a set of grinding activity index intervals, obtaining a plurality of sets of grinding index interval change rates, calculating a set of annealing index interval change rates corresponding to a set of annealing activity index intervals, obtaining a plurality of sets of annealing index interval change rates, calculating a set of holding index interval change rates corresponding to a set of holding activity index intervals, obtaining a plurality of sets of holding index interval change rates, identifying the maximum index change rate from the set of grinding index interval change rates, the set of annealing index interval change rates, and the set of holding index interval change rates according to the activity index of the magnetic powder, identifying a target preparation combination in a set of associated preparation combinations, and uniformly modifying the injection magnetic powder according to the independent preparation item and the target preparation combination. The present application can improve the low activity improvement efficiency and modification uniformity of the injection magnetic powder.

Description

Technical Field

[0001] This invention relates to the field of magnetic powder modification technology, and in particular to a method and system for enhancing the activity and uniformly modifying injected magnetic powder. Background Technology

[0002] With the rapid development of fields such as electronic information, new energy vehicles, and medical devices, the demand for high-performance permanent magnet materials is increasing. Injection-molded magnetic powder has become a research hotspot due to its advantages such as the ability to process complex shapes and high dimensional accuracy.

[0003] Currently, the physical properties of injection-molded magnetic powder, such as remanence, compact density, intrinsic coercivity, and average particle size, can be optimized by controlling processes such as grinding time, annealing temperature, and annealing holding time. However, the compatibility between the physical properties to be optimized and the preparation process is not analyzed during the process of controlling the physical properties of injection-molded magnetic powder. This results in low modification efficiency, and it is difficult to achieve uniform changes in physical properties by specifically adjusting the preparation process. Therefore, current injection-molded magnetic powders suffer from low activity enhancement efficiency and difficulty in achieving uniform control of physical properties. Summary of the Invention

[0004] This invention provides a method and system for enhancing the activity and uniformly modifying injected magnetic powder. Its main purpose is to solve the problems of low efficiency in enhancing the activity of current injected magnetic powder and difficulty in achieving uniform control of its physical properties.

[0005] To achieve the above objectives, the present invention provides a method for enhancing the activity and uniformly modifying injected magnetic powder, comprising:

[0006] Set up grinding-annealing combination sequences, annealing-holding combination sequences, and grinding-holding combination sequences according to the preset grinding time sequence, annealing temperature sequence, and annealing holding time sequence;

[0007] Extract the annealing-holding combination sequentially from the annealing-holding combination sequence;

[0008] Based on the grinding time series and annealing-holding combination, the index test is carried out using the preset magnetic powder activity index set to obtain the grinding activity index interval set. The grinding index interval change rate set corresponding to the grinding activity index interval set is calculated to obtain multiple sets of grinding index interval change rate sets. Among them, the magnetic powder activity index set includes: remanence, compact density, intrinsic coercivity, and average particle size.

[0009] Extract the grinding-heat preservation combination sequentially from the grinding-heat preservation combination sequence;

[0010] Based on the annealing temperature sequence and the grinding-holding combination, the magnetic powder activity index set is used to test the index, and the annealing activity index interval set is obtained. The annealing index interval change rate set corresponding to the annealing activity index interval set is calculated, and multiple sets of annealing index interval change rate sets are obtained.

[0011] Extract grinding-annealing combinations sequentially from the grinding-annealing combination sequence;

[0012] Based on the annealing and heat preservation time series and the grinding-annealing combination, the magnetic powder activity index set is tested to obtain the heat preservation activity index interval set. The heat preservation index interval change rate set corresponding to the heat preservation activity index interval set is calculated to obtain multiple sets of heat preservation index interval change rate sets.

[0013] Magnetic powder activity indicators are extracted sequentially from the set of magnetic powder activity indicators. Based on the set of change rates of magnetic powder activity indicators in the grinding index interval, the set of change rates of annealing index interval, and the set of change rates of heat preservation index interval, the maximum index change rate is identified to obtain the set of maximum index change rates.

[0014] Identify the associated combination set corresponding to the set of the largest rate of change of indicators;

[0015] Identify the target preparation combination corresponding to the preset current modification index in the associated preparation combination set, identify the self-variant preparation items of the target preparation combination, and uniformly modify the injected magnetic powder according to the self-variant preparation items and the target preparation combination.

[0016] Optionally, the step of setting the grinding-annealing combination sequence, annealing-holding combination sequence, and grinding-holding combination sequence according to the preset grinding time sequence, annealing temperature sequence, and annealing holding time sequence includes:

[0017] The grinding time sequence and annealing temperature sequence are combined to obtain a grinding-annealing combined sequence, wherein the number of grinding times in the grinding time sequence is . The number of annealing temperatures in the annealing temperature sequence is The number of grinding-annealing combinations in the grinding-annealing combination sequence is ;

[0018] The annealing temperature sequence and annealing holding time sequence are combined to obtain an annealing-holding combination sequence, wherein the number of annealing holding times in the annealing holding time sequence is [missing information]. The number of annealing-holding combinations in the annealing-holding combination sequence is ;

[0019] The grinding time sequence and the annealing holding time sequence are combined to obtain a grinding-holding combination sequence, wherein the number of grinding-holding combinations in the grinding-holding combination sequence is: .

[0020] Optionally, the step of performing index testing based on the grinding time sequence and annealing-holding combination using a preset set of magnetic powder activity indexes to obtain a set of grinding activity index intervals includes:

[0021] Magnetic powder activity indicators are extracted sequentially from the set of magnetic powder activity indicators.

[0022] The grinding time is extracted sequentially from the grinding time sequence, and the pre-obtained ferrite magnetic powder is processed according to the grinding time and annealing-holding combination to obtain injection magnetic powder;

[0023] The injected magnetic powder is subjected to single-index testing based on the magnetic powder activity index to obtain a grinding activity index test value set, wherein the grinding activity index test value in the grinding activity index test value set corresponds one-to-one with the grinding time.

[0024] Identify the minimum and maximum grinding index test values ​​in the set of grinding activity index test values;

[0025] The grinding activity index range is determined based on the minimum and maximum grinding index test values.

[0026] By collecting the grinding activity index intervals corresponding to each magnetic powder activity index, a grinding activity index interval set is obtained.

[0027] Optionally, the calculation of the grinding activity index interval set corresponding to the grinding index interval change rate set yields multiple sets of grinding index interval change rate sets, including:

[0028] The grinding activity index intervals are extracted sequentially from the set of grinding activity index intervals;

[0029] Identify the minimum grinding time corresponding to the minimum grinding index test value and the maximum grinding time corresponding to the maximum grinding index test value within the grinding activity index range;

[0030] Calculate the grinding time difference based on the minimum and maximum grinding times;

[0031] Identify the grinding interval difference of the grinding activity index range, wherein the grinding interval difference refers to the difference between the maximum grinding index test value and the minimum grinding index test value;

[0032] The grinding index interval change rate is calculated based on the grinding interval difference and grinding time difference to obtain the grinding index interval change rate set;

[0033] By summarizing the set of variation rates of grinding index intervals corresponding to each annealing-holding combination, multiple sets of variation rates of grinding index intervals are obtained.

[0034] Optionally, the step of identifying the maximum rate of change of the magnetic powder activity index within the set of change rates of the grinding index, the set of change rates of the annealing index, and the set of change rates of the heat preservation index, to obtain the set of maximum rate of change of the index, includes:

[0035] Identify the in-group grinding index change rate corresponding to the magnetic powder activity index within the set of change rates of the grinding index range;

[0036] The change rate of grinding index within each group corresponding to each annealing-holding combination is collected to obtain the set of change rates of grinding index within each group;

[0037] The maximum rate of change of grinding index within the group is identified from the set of rate of change of grinding index within the group.

[0038] Identify the in-group annealing index change rate corresponding to the magnetic powder activity index within the set of change rates of the annealing index range;

[0039] The change rates of annealing indices within each group corresponding to each grinding-heating combination are collected to obtain the set of change rates of annealing indices within each group.

[0040] Identify the largest rate of change of annealing index within the set of rates of change of annealing index within the group;

[0041] Identify the change rate of the thermal insulation index within the group corresponding to the magnetic powder activity index from the set of change rates of the thermal insulation index range;

[0042] The change rate of the insulation index within each group corresponding to each grinding-annealing combination is collected to obtain the set of change rates of the insulation index within each group.

[0043] The maximum rate of change of thermal insulation index within the group is identified from the set of rates of change of thermal insulation index within the group.

[0044] The maximum index change rate is selected from the maximum group grinding index change rate, the maximum group annealing index change rate, and the maximum group heat preservation index change rate. The maximum index change rate refers to the maximum value among the maximum group grinding index change rate, the maximum group annealing index change rate, and the maximum group heat preservation index change rate.

[0045] The maximum rate of change of each magnetic powder activity index is collected to obtain the set of maximum rate of change of index.

[0046] Optionally, identifying the target preparation combination corresponding to the preset current modification index in the associated preparation combination set includes:

[0047] Identify the rate of change of the modified index corresponding to the current modified index from the set of maximum rate of change of the modified index, wherein the rate of change of the modified index refers to the maximum rate of change of the modified index corresponding to the current modified index.

[0048] Identify the target preparation combination corresponding to the rate of change of the modified index in the set of associated preparation combinations, wherein the target preparation combination refers to the associated preparation combination corresponding to the rate of change of the modified index.

[0049] Optionally, the self-preparation item of the identified target preparation combination includes:

[0050] Determine whether the target preparation combination is a grinding-annealing combination;

[0051] If the target preparation combination is a grinding-annealing combination, then the variable preparation item is the annealing holding time;

[0052] If the target preparation combination is not a grinding-annealing combination, then determine whether the target preparation combination is an annealing-heat preservation combination;

[0053] If the target preparation combination is an annealing-holding combination, then the variable preparation item is the grinding time;

[0054] If the target preparation combination is not an annealing-holding combination, then the variable preparation item is the annealing temperature.

[0055] Optionally, the uniform modification of the injection magnetic powder according to the self-variant preparation project and the target preparation combination includes:

[0056] Receive a sequence of target uniformity index test values, and extract the target uniformity index test values ​​sequentially from the sequence of target uniformity index test values;

[0057] Identify the preparation project category of the self-variant preparation project;

[0058] If the preparation item category is grinding time, then the first adjacent grinding activity index test value and the second adjacent grinding activity index test value of the target uniformity index test value are identified in the grinding activity index test value set. The first adjacent grinding activity index test value refers to the grinding activity index test value that is first close to the target uniformity index test value, and the second adjacent grinding activity index test value refers to the grinding activity index test value that is second close to the target uniformity index test value.

[0059] The first grinding time and the second grinding time corresponding to the first adjacent grinding activity index test value and the second adjacent grinding activity index test value are identified respectively, and the grinding time self-variation range is determined based on the first grinding time and the second grinding time.

[0060] The grinding time is dynamically adjusted according to the self-variable range of the grinding time to obtain the dynamic grinding time;

[0061] Test injection magnetic powder is prepared based on the dynamic grinding time and target preparation combination, and the actual index test value of the test injection magnetic powder with respect to the current modification index is identified.

[0062] Determine whether the actual indicator test value is equal to the target uniformity indicator test value;

[0063] If the actual index test value is not equal to the target uniformity index test value, then return to the above steps of dynamically adjusting the grinding time according to the grinding time self-variation range;

[0064] If the actual index test value is equal to the target uniformity index test value, then the dynamic grinding time is taken as the target uniformity grinding test time.

[0065] Collect all the target uniformity index test values ​​and corresponding target uniformity grinding test times to obtain the target uniformity grinding test time set;

[0066] The injection magnetic powder is uniformly modified according to the target uniform grinding test time set and the target preparation combination;

[0067] If the preparation item category is annealing temperature, then obtain the set of annealing activity index test values;

[0068] In the set of annealing activity index test values, a first adjacent annealing activity index test value and a second adjacent annealing activity index test value of the target uniformity index test value are identified. The first adjacent annealing activity index test value refers to the annealing activity index test value that is first close to the target uniformity index test value, and the second adjacent annealing activity index test value refers to the annealing activity index test value that is second close to the target uniformity index test value.

[0069] Identify the first annealing temperature and the second annealing temperature corresponding to the first adjacent annealing activity index test value and the second adjacent annealing activity index test value respectively, and determine the annealing temperature self-variation range based on the first annealing temperature and the second annealing temperature.

[0070] The annealing temperature is dynamically adjusted according to the self-variable range of the annealing temperature to obtain the dynamic annealing temperature;

[0071] Test injection magnetic powder is prepared based on the dynamic annealing temperature and target preparation combination, and the actual index test value of the test injection magnetic powder with respect to the current modification index is identified.

[0072] Determine whether the actual indicator test value is equal to the target uniformity indicator test value;

[0073] If the actual index test value is not equal to the target uniformity index test value, then return to the above steps of dynamically adjusting the annealing temperature according to the annealing temperature self-variation range;

[0074] If the actual index test value is equal to the target uniformity index test value, then the dynamic annealing temperature is taken as the target uniformity annealing test temperature.

[0075] Collect all the target uniformity index test values ​​and corresponding target uniformity annealing test temperatures to obtain the target uniformity annealing test temperature set;

[0076] The injection magnetic powder is uniformly modified according to the target uniform annealing test temperature set and the target preparation combination;

[0077] If the preparation item category is annealing and heat preservation time, then obtain the set of test values ​​for heat preservation activity index;

[0078] Identify the target uniform heat preservation test time set based on the set of heat preservation activity index test values ​​and the target uniformity index test values;

[0079] The injected magnetic powder is uniformly modified according to the target uniform heat preservation test time set and the target preparation combination.

[0080] Optionally, identifying the target uniform thermal insulation test time set based on the set of thermal insulation activity index test values ​​and the target uniformity index test values ​​includes:

[0081] In the set of thermal insulation activity index test values, the first adjacent thermal insulation activity index test value and the second adjacent thermal insulation activity index test value of the target uniformity index test value are identified. The first adjacent thermal insulation activity index test value refers to the thermal insulation activity index test value that is first close to the target uniformity index test value, and the second adjacent thermal insulation activity index test value refers to the thermal insulation activity index test value that is second close to the target uniformity index test value.

[0082] Identify the first and second insulation times corresponding to the first and second adjacent insulation activity index test values, respectively, and determine the insulation time range based on the first and second insulation times.

[0083] The heat preservation time is dynamically adjusted according to the heat preservation time variable range to obtain the dynamic heat preservation time;

[0084] Based on the dynamic heat preservation time and the target preparation combination, test injection magnetic powder is prepared, and the actual index test value of the test injection magnetic powder with respect to the current modification index is identified.

[0085] Determine whether the actual indicator test value is equal to the target uniformity indicator test value;

[0086] If the actual index test value is not equal to the target uniform index test value, then return to the above steps of dynamically adjusting the heat preservation time according to the heat preservation time self-variation range;

[0087] If the actual index test value is equal to the target uniform index test value, then the dynamic heat preservation time is taken as the target uniform heat preservation test time.

[0088] Collect the target uniform heat preservation test times corresponding to all target uniformity index test values ​​to obtain the target uniform heat preservation test time set.

[0089] To achieve the above objectives, the present invention also provides a system for enhancing the activity and uniformly modifying injected magnetic powder, comprising:

[0090] The preparation project combination module is used to set the grinding-annealing combination sequence, annealing-holding combination sequence, and grinding-holding combination sequence according to the preset grinding time sequence, annealing temperature sequence, and annealing holding time sequence;

[0091] The index interval change rate calculation module is used to sequentially extract the annealing-holding combination from the annealing-holding combination sequence; based on the grinding time sequence and the annealing-holding combination, it performs index tests using a preset magnetic powder activity index set to obtain a grinding activity index interval set, calculates the grinding index interval change rate set corresponding to the grinding activity index interval set, and obtains multiple sets of grinding index interval change rate sets. The magnetic powder activity index set includes: remanence, compact density, intrinsic coercivity, and average particle size; it sequentially extracts the grinding-holding combination from the grinding-holding combination sequence; and calculates the grinding index interval change rate set corresponding to the annealing temperature. The sequence and grinding-annealing combination were used to test the magnetic powder activity index set to obtain the annealing activity index interval set. The change rate set of the annealing index interval corresponding to the annealing activity index interval set was calculated to obtain multiple sets of annealing index interval change rate sets. The grinding-annealing combination was extracted sequentially from the grinding-annealing combination sequence. The magnetic powder activity index set was tested according to the annealing and holding time series and the grinding-annealing combination to obtain the holding activity index interval set. The change rate set of the holding activity index interval corresponding to the holding activity index interval set was calculated to obtain multiple sets of holding index interval change rate sets.

[0092] The associated preparation combination set identification module is used to sequentially extract magnetic powder activity indicators from the magnetic powder activity indicator set, identify the maximum indicator change rate based on the change rate sets of the magnetic powder activity indicators in the grinding indicator interval, annealing indicator interval, and heat preservation indicator interval, and obtain the maximum indicator change rate set; and identify the associated preparation combination set corresponding to the maximum indicator change rate set.

[0093] The injection magnetic powder uniform modification module is used to identify the target preparation combination corresponding to the preset current modification index in the associated preparation combination set, identify the independent preparation items of the target preparation combination, and perform uniform modification of the injection magnetic powder according to the independent preparation items and the target preparation combination.

[0094] To address the above problems, the present invention also provides an electronic device, the electronic device comprising:

[0095] A memory that stores at least one instruction; and a processor that executes the instruction stored in the memory to implement the above-described method for enhancing the activity and uniformly modifying the injected magnetic powder.

[0096] To address the aforementioned problems, the present invention also provides a computer-readable storage medium storing at least one instruction, which is executed by a processor in an electronic device to implement the above-described method for enhancing the activity and uniformly modifying injected magnetic powder.

[0097] Beneficial Effects: To address the problems described in the background art, this invention first analyzes the relevant preparation items for enhancing and modifying the activity of injected magnetic powder, namely grinding time, annealing temperature, and annealing holding time. Therefore, grinding time series, annealing temperature series, and annealing holding time series are constructed, and grinding-annealing combination series, annealing-holding combination series, and grinding-holding combination series are defined. Since the rate of change of the index range of each magnetic powder activity index is different under different preparation combinations, classification analysis is required. There are three main categories of preparation combinations: annealing-holding combination, ... The grinding-holding combination and the grinding-annealing combination are used. Therefore, the annealing-holding combination is first extracted sequentially from the annealing-holding combination sequence. Based on the grinding time sequence and the annealing-holding combination, index tests are performed using a pre-set magnetic powder activity index set to obtain a grinding activity index interval set. The corresponding grinding index interval change rate set is calculated, resulting in multiple sets of grinding index interval change rate sets. Then, the grinding-holding combination is extracted sequentially from the grinding-holding combination sequence. Based on the annealing temperature sequence and the grinding-holding combination, index tests are performed using the magnetic powder activity index set to obtain the annealing activity index interval set. The set of annealing activity index intervals was calculated, and the set of annealing index interval change rates corresponding to the set of annealing activity index intervals was obtained, resulting in multiple sets of annealing index interval change rate sets. Finally, grinding-annealing combinations were extracted sequentially from the grinding-annealing combination sequence. Based on the annealing holding time series and grinding-annealing combinations, the magnetic powder activity index set was tested to obtain the holding activity index interval set. The set of holding activity index interval change rates corresponding to the set of holding activity index intervals was calculated, resulting in multiple sets of holding index interval change rate sets. To identify the preparation combination values ​​corresponding to the maximum index change rate for different magnetic powder activity indices, [further details can be provided]. The activity indicators of magnetic powder are extracted sequentially from the activity indicator set. Based on the change rate sets of the magnetic powder activity indicators in the grinding, annealing, and heat preservation indicator ranges, the maximum change rate of the indicator is identified, resulting in a set of maximum change rates. The associated preparation combination set corresponding to the maximum change rate set is then identified. Finally, the current modification indicator is received, and a target preparation combination corresponding to the preset current modification indicator is identified in the associated preparation combination set. Then, the self-variant preparation items of the target preparation combination are identified. Finally, the injected magnetic powder is uniformly modified based on the self-variant preparation items and the target preparation combination. Therefore, this invention can solve the problems of low activity enhancement efficiency and difficulty in uniformly controlling the physical properties of current injected magnetic powders. Attached Figure Description

[0098] Figure 1 This is a schematic flowchart of a method for enhancing the activity and uniformly modifying injected magnetic powder according to an embodiment of the present invention.

[0099] Figure 2 A functional block diagram of an injection magnetic powder activity enhancement and uniform modification system provided in an embodiment of the present invention;

[0100] Figure 3 This is a schematic diagram of an electronic device that implements the method for enhancing the activity and uniformly modifying the injected magnetic powder, according to an embodiment of the present invention.

[0101] Explanation of reference numerals in the attached figures:

[0102] 10. Electronic device; 11. Processor; 12. Memory; 13. Bus.

[0103] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0104] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0105] This application provides a method for enhancing the activity and uniformly modifying injected magnetic powder. The execution entity of this method includes, but is not limited to, at least one of the following electronic devices configured to execute the method provided in this application: a server, a terminal, etc. In other words, the method for enhancing the activity and uniformly modifying injected magnetic powder can be executed by software or hardware installed on a terminal device or a server device, and the software can be a blockchain platform. The server includes, but is not limited to, a single server, a server cluster, a cloud server, or a cloud server cluster.

[0106] Reference Figure 1 The diagram shown is a flowchart illustrating a method for enhancing the activity and uniformly modifying injected magnetic powder according to an embodiment of the present invention. In this embodiment, the method for enhancing the activity and uniformly modifying injected magnetic powder includes:

[0107] S1. Set the grinding-annealing combination sequence, annealing-holding combination sequence, and grinding-holding combination sequence according to the preset grinding time sequence, annealing temperature sequence, and annealing holding time sequence.

[0108] It should be understood that the grinding time sequence refers to a sequence of preset grinding times, such as 1h, 1.5h, 2h, 2.5h, 3h, 3.5h, and 4h; and the annealing temperature sequence refers to a sequence of preset annealing temperatures, such as: , , , , , The annealing holding time sequence refers to a sequence of preset annealing holding times, such as 20 min, 40 min, 60 min, 80 min, 100 min, and 120 min. The grinding-annealing combination sequence refers to a combination sequence constructed based on grinding time and annealing temperature, such as: grinding time 1 hour, annealing temperature... Grinding time 1 hour, annealing temperature Wait, the annealing-holding combination sequence refers to a combination sequence constructed based on the annealing temperature and the annealing holding time, for example: annealing temperature Annealing holding time: 20 min; grinding time: 1 h; annealing temperature: Wait, the grinding-holding combination sequence refers to a combination sequence constructed based on grinding time and annealing holding time, for example: grinding time 1h, annealing holding time 20min; grinding time 1h, annealing holding time 40min.

[0109] In this embodiment of the invention, setting the grinding-annealing combination sequence, the annealing-holding combination sequence, and the grinding-holding combination sequence according to the preset grinding time sequence, annealing temperature sequence, and annealing holding time sequence includes:

[0110] The grinding time sequence and annealing temperature sequence are combined to obtain a grinding-annealing combined sequence, wherein the number of grinding times in the grinding time sequence is . The number of annealing temperatures in the annealing temperature sequence is The number of grinding-annealing combinations in the grinding-annealing combination sequence is ;

[0111] The annealing temperature sequence and annealing holding time sequence are combined to obtain an annealing-holding combination sequence, wherein the number of annealing holding times in the annealing holding time sequence is [missing information]. The number of annealing-holding combinations in the annealing-holding combination sequence is ;

[0112] The grinding time sequence and the annealing holding time sequence are combined to obtain a grinding-holding combination sequence, wherein the number of grinding-holding combinations in the grinding-holding combination sequence is: .

[0113] S2. Extract the annealing-holding combination sequentially from the annealing-holding combination sequence.

[0114] S3. Based on the grinding time sequence and annealing-heat preservation combination, the index is tested using the preset magnetic powder activity index set to obtain the grinding activity index interval set. The grinding index interval change rate set corresponding to the grinding activity index interval set is calculated to obtain multiple sets of grinding index interval change rate sets.

[0115] In detail, the magnetic powder activity index set refers to a set of indicators for evaluating the physical properties of injection-molded magnetic powder. The injection-molded magnetic powder can be injection-molded ferrite magnetic powder, whose main raw materials are ferrite magnetic powder and hard organic polymer materials. The magnetic powder activity index set includes: remanence, compact density, intrinsic coercivity, and average particle size. The index testing refers to testing the physical properties of the injection-molded magnetic powder from multiple magnetic powder activity indices by controlling the actual parameters of the preparation project. The preparation project includes: grinding time, annealing temperature, and annealing holding time. The grinding activity index interval set refers to the set of variation intervals of a single magnetic powder activity index during index testing with grinding time as the independent variable. The grinding index interval change rate set refers to the set of change rates of grinding activity index intervals per unit grinding time, where the unit grinding time can be 1 hour. The multiple sets of grinding index interval change rate sets refer to the combination of grinding index interval change rate sets corresponding to various annealing-holding combinations.

[0116] In this embodiment of the invention, the step of performing index testing based on the grinding time sequence and annealing-holding combination using a preset magnetic powder activity index set to obtain a grinding activity index interval set includes:

[0117] Magnetic powder activity indicators are extracted sequentially from the set of magnetic powder activity indicators.

[0118] The grinding time is extracted sequentially from the grinding time sequence, and the pre-obtained ferrite magnetic powder is processed according to the grinding time and annealing-holding combination to obtain injection magnetic powder;

[0119] The injected magnetic powder is subjected to single-index testing based on the magnetic powder activity index to obtain a grinding activity index test value set, wherein the grinding activity index test value in the grinding activity index test value set corresponds one-to-one with the grinding time.

[0120] Identify the minimum and maximum grinding index test values ​​in the set of grinding activity index test values;

[0121] The grinding activity index range is determined based on the minimum and maximum grinding index test values.

[0122] By collecting the grinding activity index intervals corresponding to each magnetic powder activity index, a grinding activity index interval set is obtained.

[0123] Furthermore, the processing of the ferrite magnetic powder mainly includes: grinding, annealing, and annealing heat preservation. The single-index test refers to testing one magnetic powder activity index of the injected magnetic powder. The grinding activity index test value set refers to the set of grinding activity index test values ​​of the injected magnetic powder for each grinding time, under the condition that the annealing-heat preservation combination remains unchanged. For example: when the grinding time is 1 hour and the magnetic powder activity index is remanent, the grinding activity index test value is 160 mT; when the grinding time is 1.5 hours and the magnetic powder activity index is remanent, the grinding activity index test value is 165 mT; when the grinding time is 2 hours and the magnetic powder activity index is remanent, the grinding activity index test value is 170 mT; when the grinding time is 2.5 hours and the magnetic powder activity index is remanent, the grinding activity index test value is 163 mT. Therefore, the grinding activity index test value set is 160 mT, 165 mT, 170 mT, and 163 mT. The minimum grinding activity index test value refers to the smallest grinding activity index test value in the set of grinding activity index test values. The maximum grinding activity index test value refers to the largest grinding activity index test value in the set of grinding activity index test values. The grinding activity index range refers to the range of variation of the set of grinding activity index test values, for example: The grinding activity index interval set refers to the set of grinding activity index intervals corresponding to each magnetic powder activity index.

[0124] In this embodiment of the invention, the calculation of the grinding activity index interval set corresponding to the grinding index interval change rate set yields multiple sets of grinding index interval change rate sets, including:

[0125] The grinding activity index intervals are extracted sequentially from the set of grinding activity index intervals;

[0126] Identify the minimum grinding time corresponding to the minimum grinding index test value and the maximum grinding time corresponding to the maximum grinding index test value within the grinding activity index range;

[0127] Calculate the grinding time difference based on the minimum and maximum grinding times;

[0128] Identify the grinding interval difference of the grinding activity index range, wherein the grinding interval difference refers to the difference between the maximum grinding index test value and the minimum grinding index test value;

[0129] The grinding index interval change rate is calculated based on the grinding interval difference and grinding time difference to obtain the grinding index interval change rate set;

[0130] By summarizing the set of variation rates of grinding index intervals corresponding to each annealing-holding combination, multiple sets of variation rates of grinding index intervals are obtained.

[0131] Explained, the minimum grinding time refers to the grinding time point corresponding to the minimum grinding index test value, and the maximum grinding time refers to the grinding time point corresponding to the maximum grinding index test value. The grinding time difference refers to the time difference between the minimum grinding time and the maximum grinding time. The grinding index range change rate refers to the rate of change of the grinding activity index range per unit grinding time. For example, when the grinding activity index range is... If the grinding interval difference is 10mT and the grinding time difference is 1h, then the grinding index interval change rate is an average change of 10mT per hour.

[0132] S4. Extract the grinding-heat preservation combination sequentially from the grinding-heat preservation combination sequence.

[0133] S5. Based on the annealing temperature sequence and the grinding-holding combination, the magnetic powder activity index set is used to test the indexes, obtain the annealing activity index interval set, calculate the annealing index interval change rate set corresponding to the annealing activity index interval set, and obtain multiple sets of annealing index interval change rate sets.

[0134] Furthermore, the set of annealing activity index intervals refers to the set of variation intervals of a single magnetic powder activity index during index testing with annealing temperature as the independent variable. The set of annealing index interval change rates refers to the set of change rates of the annealing activity index intervals at a unit annealing temperature, where the unit annealing temperature can be 1. The set of multiple annealing index interval change rates refers to the combination of the annealing index interval change rate sets corresponding to each grinding-holding combination.

[0135] Furthermore, the methods for obtaining the set of annealing activity index intervals and the set of multiple sets of annealing index interval change rates are the same as those for obtaining the set of grinding activity index intervals, and will not be repeated here.

[0136] S6. Extract the grinding-annealing combination sequentially from the grinding-annealing combination sequence.

[0137] S7. Based on the annealing and heat preservation time series and the grinding-annealing combination, the magnetic powder activity index set is tested to obtain the heat preservation activity index interval set. The heat preservation index interval change rate set corresponding to the heat preservation activity index interval set is calculated to obtain multiple sets of heat preservation index interval change rate sets.

[0138] It should be understood that the set of heat preservation activity index intervals refers to the set of variation intervals of a single magnetic powder activity index during index testing, with the annealing holding time as the independent variable. The set of heat preservation index interval change rates refers to the set of change rates of heat preservation activity index intervals under a unit holding time, where the unit holding time can be 1 minute. The multiple sets of heat preservation index interval change rate sets refer to the combination of heat preservation index interval change rate sets corresponding to each grinding-annealing combination.

[0139] Understandably, the method for obtaining the set of thermal insulation activity index intervals and the set of multiple sets of thermal insulation index interval change rates is the same as the method for obtaining the set of grinding activity index intervals, and will not be repeated here.

[0140] S8. Extract magnetic powder activity indicators sequentially from the magnetic powder activity indicator set. Identify the maximum indicator change rate based on the change rate sets of the magnetic powder activity indicators in the grinding indicator interval, annealing indicator interval, and heat preservation indicator interval, and obtain the maximum indicator change rate set.

[0141] Understandably, the maximum index change rate refers to the largest index interval change rate corresponding to the set of change rates for the magnetic powder activity index within the grinding index interval, the annealing index interval, and the heat preservation index interval. The set of maximum index change rates refers to the collection of maximum index change rates corresponding to each magnetic powder activity index. For example, when the set of change rates for the grinding index interval is: remanence changes by an average of 10 mT per hour, and the compact density changes by an average of [missing value] per hour... Intrinsic coercivity is the average hourly variation. The average particle size is the average change per hour. The annealing index range change rate set includes remanence with an average change of 6 mT per degree Celsius and billet density with an average change per degree Celsius. Intrinsic coercivity is the average change per degree Celsius. The average particle size is the average change per degree Celsius. The set of variation rates for thermal insulation parameters is as follows: remanence is an average change of 7 mT per minute, and the density of the pressed billet is an average change of... Intrinsic coercivity is the average change per minute. The average particle size is the average change per minute. When the magnetic powder activity index is remanence, the maximum index change rate is an average hourly change of 10 mT with grinding time as the independent variable; when the magnetic powder activity index is compact density, the maximum index change rate is an average hourly change with grinding time as the independent variable. When the magnetic powder activity index is intrinsic coercivity, the maximum index change rate is the average change per minute with annealing holding time as the independent variable. When the magnetic powder activity index is the average particle size, the maximum index change rate is the average change per minute with annealing holding time as the independent variable. .

[0142] In this embodiment of the invention, the step of identifying the maximum rate of change of the magnetic powder activity index within the sets of change rates of the grinding index, the annealing index, and the heat preservation index, and obtaining the set of maximum rate of change of the index, includes:

[0143] Identify the in-group grinding index change rate corresponding to the magnetic powder activity index within the set of change rates of the grinding index range;

[0144] The change rate of grinding index within each group corresponding to each annealing-holding combination is collected to obtain the set of change rates of grinding index within each group;

[0145] The maximum rate of change of grinding index within the group is identified from the set of rate of change of grinding index within the group.

[0146] Identify the in-group annealing index change rate corresponding to the magnetic powder activity index within the set of change rates of the annealing index range;

[0147] The change rates of annealing indices within each group corresponding to each grinding-heating combination are collected to obtain the set of change rates of annealing indices within each group.

[0148] Identify the largest rate of change of annealing index within the set of rates of change of annealing index within the group;

[0149] Identify the change rate of the thermal insulation index within the group corresponding to the magnetic powder activity index from the set of change rates of the thermal insulation index range;

[0150] The change rate of the insulation index within each group corresponding to each grinding-annealing combination is collected to obtain the set of change rates of the insulation index within each group.

[0151] The maximum rate of change of thermal insulation index within the group is identified from the set of rates of change of thermal insulation index within the group.

[0152] The maximum index change rate is selected from the maximum group grinding index change rate, the maximum group annealing index change rate, and the maximum group heat preservation index change rate. The maximum index change rate refers to the maximum value among the maximum group grinding index change rate, the maximum group annealing index change rate, and the maximum group heat preservation index change rate.

[0153] The maximum rate of change of each magnetic powder activity index is collected to obtain the set of maximum rate of change of index.

[0154] Further, the intra-group grinding index change rate refers to the grinding index interval change rate related to the magnetic powder activity index within the set of grinding index interval change rates. The intra-group grinding index change rate set refers to the set of intra-group grinding index change rates corresponding to each annealing-holding combination. The maximum intra-group grinding index change rate refers to the largest intra-group grinding index change rate within the set of intra-group grinding index change rates. The intra-group annealing index change rate refers to the annealing index interval change rate related to the magnetic powder activity index within the set of annealing index interval change rates. The intra-group annealing index change rate set refers to the set of intra-group annealing index change rates corresponding to the grinding-holding combination. The maximum intra-group annealing index change rate refers to the largest intra-group annealing index change rate within the set of intra-group annealing index change rates. The rate of change of the insulation index within a group refers to the rate of change of the insulation index interval with respect to the magnetic powder activity index within the set of rates of change of the insulation index interval. The set of rates of change of the insulation index within a group refers to the set of rates of change of the insulation index within a group corresponding to the grinding-annealing combination. The maximum rate of change of the insulation index within a group refers to the maximum rate of change of the insulation index within a group in the set of rates of change of the insulation index within a group.

[0155] S9. Identify the associated combination set corresponding to the set of the largest index change rate.

[0156] Explained, the associated preparation combination set refers to the combination of preparation items associated with the maximum index change rate, for example: when the maximum index change rate of remanence is an average hourly change of 10 mT with grinding time as the independent variable; the maximum index change rate of compact density is an average hourly change with grinding time as the independent variable. The maximum rate of change of intrinsic coercivity is the average change per minute with annealing holding time as the independent variable. The maximum rate of change in average particle size is the average change per minute with annealing holding time as the independent variable. When the maximum rate of change of remanence is reached, the associated preparation combination can be the annealing-holding combination. -80min); the associated preparation combination for the maximum rate of change of the compact density can be an annealing-holding combination ( -70min); the correlation preparation combination for the maximum rate of change of intrinsic coercivity can be the grinding-annealing combination (3h- ). The associated preparation combination for the maximum rate of change in average particle size can be a grinding-annealing combination (3.5h-). ).

[0157] S10. Identify the target preparation combination corresponding to the preset current modification index in the associated preparation combination set, identify the self-variant preparation items of the target preparation combination, and uniformly modify the injected magnetic powder according to the self-variant preparation items and the target preparation combination.

[0158] Understandably, the current modification index refers to the magnetic powder activity index whose physical properties need to be changed. The target preparation combination refers to the associated preparation combination corresponding to the current modification index. The independent preparation item refers to the preparation item that needs to be used as the independent variable.

[0159] In this embodiment of the invention, identifying the target preparation combination corresponding to the preset current modification index in the associated preparation combination set includes:

[0160] Identify the rate of change of the modified index corresponding to the current modified index from the set of maximum rate of change of the modified index, wherein the rate of change of the modified index refers to the maximum rate of change of the modified index corresponding to the current modified index.

[0161] Identify the target preparation combination corresponding to the rate of change of the modified index in the set of associated preparation combinations, wherein the target preparation combination refers to the associated preparation combination corresponding to the rate of change of the modified index.

[0162] For example, when the current modification index is remanence, the rate of change of the modification index can be an average change of 10 mT per hour with grinding time as the independent variable. In this case, the target preparation combination can be an annealing-holding combination. -80min).

[0163] In this embodiment of the invention, the variable preparation item for identifying the target preparation combination includes:

[0164] Determine whether the target preparation combination is a grinding-annealing combination;

[0165] If the target preparation combination is a grinding-annealing combination, then the variable preparation item is the annealing holding time;

[0166] If the target preparation combination is not a grinding-annealing combination, then determine whether the target preparation combination is an annealing-heat preservation combination;

[0167] If the target preparation combination is an annealing-holding combination, then the variable preparation item is the grinding time;

[0168] If the target preparation combination is not an annealing-holding combination, then the variable preparation item is the annealing temperature.

[0169] In this embodiment of the invention, the uniform modification of the injection magnetic powder according to the self-variant preparation project and the target preparation combination includes:

[0170] Receive a sequence of target uniformity index test values, and extract the target uniformity index test values ​​sequentially from the sequence of target uniformity index test values;

[0171] Identify the preparation project category of the self-variant preparation project;

[0172] If the preparation item category is grinding time, then the first adjacent grinding activity index test value and the second adjacent grinding activity index test value of the target uniformity index test value are identified in the grinding activity index test value set. The first adjacent grinding activity index test value refers to the grinding activity index test value that is first close to the target uniformity index test value, and the second adjacent grinding activity index test value refers to the grinding activity index test value that is second close to the target uniformity index test value.

[0173] The first grinding time and the second grinding time corresponding to the first adjacent grinding activity index test value and the second adjacent grinding activity index test value are identified respectively, and the grinding time self-variation range is determined based on the first grinding time and the second grinding time.

[0174] The grinding time is dynamically adjusted according to the self-variable range of the grinding time to obtain the dynamic grinding time;

[0175] Test injection magnetic powder is prepared based on the dynamic grinding time and target preparation combination, and the actual index test value of the test injection magnetic powder with respect to the current modification index is identified.

[0176] Determine whether the actual indicator test value is equal to the target uniformity indicator test value;

[0177] If the actual index test value is not equal to the target uniformity index test value, then return to the above steps of dynamically adjusting the grinding time according to the grinding time self-variation range;

[0178] If the actual index test value is equal to the target uniformity index test value, then the dynamic grinding time is taken as the target uniformity grinding test time.

[0179] Collect all the target uniformity index test values ​​and corresponding target uniformity grinding test times to obtain the target uniformity grinding test time set;

[0180] The injection magnetic powder is uniformly modified according to the target uniform grinding test time set and the target preparation combination;

[0181] If the preparation item category is annealing temperature, then obtain the set of annealing activity index test values;

[0182] In the set of annealing activity index test values, a first adjacent annealing activity index test value and a second adjacent annealing activity index test value of the target uniformity index test value are identified. The first adjacent annealing activity index test value refers to the annealing activity index test value that is first close to the target uniformity index test value, and the second adjacent annealing activity index test value refers to the annealing activity index test value that is second close to the target uniformity index test value.

[0183] Identify the first annealing temperature and the second annealing temperature corresponding to the first adjacent annealing activity index test value and the second adjacent annealing activity index test value respectively, and determine the annealing temperature self-variation range based on the first annealing temperature and the second annealing temperature.

[0184] The annealing temperature is dynamically adjusted according to the self-variable range of the annealing temperature to obtain the dynamic annealing temperature;

[0185] Test injection magnetic powder is prepared based on the dynamic annealing temperature and target preparation combination, and the actual index test value of the test injection magnetic powder with respect to the current modification index is identified.

[0186] Determine whether the actual indicator test value is equal to the target uniformity indicator test value;

[0187] If the actual index test value is not equal to the target uniformity index test value, then return to the above steps of dynamically adjusting the annealing temperature according to the annealing temperature self-variation range;

[0188] If the actual index test value is equal to the target uniformity index test value, then the dynamic annealing temperature is taken as the target uniformity annealing test temperature.

[0189] Collect all the target uniformity index test values ​​and corresponding target uniformity annealing test temperatures to obtain the target uniformity annealing test temperature set;

[0190] The injection magnetic powder is uniformly modified according to the target uniform annealing test temperature set and the target preparation combination;

[0191] If the preparation item category is annealing and heat preservation time, then obtain the set of test values ​​for heat preservation activity index;

[0192] Identify the target uniform heat preservation test time set based on the set of heat preservation activity index test values ​​and the target uniformity index test values;

[0193] The injected magnetic powder is uniformly modified according to the target uniform heat preservation test time set and the target preparation combination.

[0194] Furthermore, the target uniformity index test value sequence refers to a sequence composed of preset uniformity index test values. The target uniformity index test value refers to a preset uniformity index test value. For example, when the current modification index is remanence, the target uniformity index test value sequence can be 160mT, 162mT, 164mT, 166mT, 168mT, 170mT, etc. 180mT. The preparation project category refers to the project category of the self-variant preparation project. The first proximity refers to the grinding activity index test value that ranks first in proximity to the target uniformity index test value, and the second proximity refers to the grinding activity index test value that ranks second in proximity to the target uniformity index test value. The first grinding time and the second grinding time refer to the grinding times corresponding to the first adjacent grinding activity index test value and the second adjacent grinding activity index test value, respectively. The grinding time self-variation range refers to the range of grinding time variation. The dynamic grinding time refers to the dynamically changing grinding time; for example, when the grinding time self-variation range is [1h, 4h], the dynamic grinding time can be any grinding time within the grinding time self-variation range. The test injection magnetic powder refers to the injection magnetic powder used to test the specific value of the current modified index. The actual index test value refers to the actual detection value of the test injection magnetic powder with respect to the current modified index. The target uniformity grinding test time refers to the dynamic grinding time when the actual index test value is equal to the target uniformity index test value. The annealing activity index test value set refers to the set of grinding activity index test values ​​of the injected magnetic powder with respect to the current modification index at each annealing temperature, under the condition that the grinding-holding combination remains unchanged. The first annealing temperature and the second annealing temperature refer to the annealing temperatures corresponding to the first and second adjacent annealing activity index test values, respectively. The annealing temperature self-variation range refers to the range of variation of the annealing temperature. The dynamic annealing temperature refers to the dynamically changing annealing temperature. The target uniform annealing test temperature refers to the dynamic annealing temperature when the actual index test value equals the target uniform index test value. The holding activity index test value set refers to the set of grinding activity index test values ​​of the injected magnetic powder with respect to the current modification index at each annealing holding time, under the condition that the grinding-annealing combination remains unchanged.

[0195] In this embodiment of the invention, identifying the target uniform thermal insulation test time set based on the set of thermal insulation activity index test values ​​and the target uniformity index test values ​​includes:

[0196] In the set of thermal insulation activity index test values, the first adjacent thermal insulation activity index test value and the second adjacent thermal insulation activity index test value of the target uniformity index test value are identified. The first adjacent thermal insulation activity index test value refers to the thermal insulation activity index test value that is first close to the target uniformity index test value, and the second adjacent thermal insulation activity index test value refers to the thermal insulation activity index test value that is second close to the target uniformity index test value.

[0197] Identify the first and second insulation times corresponding to the first and second adjacent insulation activity index test values, respectively, and determine the insulation time range based on the first and second insulation times.

[0198] The heat preservation time is dynamically adjusted according to the heat preservation time variable range to obtain the dynamic heat preservation time;

[0199] Based on the dynamic heat preservation time and the target preparation combination, test injection magnetic powder is prepared, and the actual index test value of the test injection magnetic powder with respect to the current modification index is identified.

[0200] Determine whether the actual indicator test value is equal to the target uniformity indicator test value;

[0201] If the actual index test value is not equal to the target uniform index test value, then return to the above steps of dynamically adjusting the heat preservation time according to the heat preservation time self-variation range;

[0202] If the actual index test value is equal to the target uniform index test value, then the dynamic heat preservation time is taken as the target uniform heat preservation test time.

[0203] Collect the target uniform heat preservation test times corresponding to all target uniformity index test values ​​to obtain the target uniform heat preservation test time set.

[0204] Further, the first holding time and the second holding time refer to the annealing holding time corresponding to the first adjacent heat preservation activity index test value and the second adjacent heat preservation activity index test value, respectively. The holding time variable range refers to the range of variation of the annealing holding time. The dynamic holding time refers to the dynamically changing annealing holding time.

[0205] To address the problems described in the background section, this invention first analyzes the relevant preparation items for enhancing and modifying the activity of injection-molded magnetic powder, namely grinding time, annealing temperature, and annealing holding time. Therefore, grinding time series, annealing temperature series, and annealing holding time series are constructed, and grinding-annealing combination series, annealing-holding combination series, and grinding-holding combination series are defined. Since the rate of change of the index range of each magnetic powder activity index is different under different preparation combinations, a classification analysis is required. There are three main categories of preparation combinations: annealing-holding combination, grinding-holding combination, and grinding-holding combination. The process involves several steps, including temperature-grinding and grinding-annealing combinations. First, the annealing-holding combination is extracted sequentially from the annealing-holding combination sequence. Then, based on the grinding time sequence and the annealing-holding combination, a pre-set set of magnetic powder activity indicators is used for index testing to obtain a set of grinding activity index intervals. The corresponding set of grinding index interval change rates is then calculated, resulting in multiple sets of grinding index interval change rate sets. Next, the grinding-holding combination is extracted sequentially from the grinding-holding combination sequence. Finally, based on the annealing temperature sequence and the grinding-holding combination, the magnetic powder activity indicator set is used for index testing to obtain the annealing activity... The set of index intervals is used to calculate the set of annealing index interval change rates corresponding to the set of annealing activity index intervals, resulting in multiple sets of annealing index interval change rate sets. Finally, grinding-annealing combinations are extracted sequentially from the grinding-annealing combination sequence. Based on the annealing holding time series and grinding-annealing combinations, the magnetic powder activity index set is tested to obtain the holding activity index interval set. The set of holding activity index interval change rates corresponding to the set of holding activity index intervals is calculated, resulting in multiple sets of holding index interval change rate sets. To identify the preparation combination values ​​corresponding to the maximum index change rate of different magnetic powder activity indices, the magnetic powder activity... The magnetic powder activity index is extracted sequentially from the set of activity indexes. Based on the sets of change rates of the magnetic powder activity index within the grinding, annealing, and heat preservation index intervals, the maximum index change rate is identified, resulting in a set of maximum index change rates. The associated preparation combination set corresponding to the maximum index change rate set is then identified. Finally, the current modification index is received, and a preset target preparation combination corresponding to the current modification index is identified within the associated preparation combination set. Then, the self-variant preparation items of the target preparation combination are identified. Finally, the injected magnetic powder is uniformly modified based on the self-variant preparation items and the target preparation combination. Therefore, this invention can solve the problems of low activity enhancement efficiency and difficulty in uniformly controlling the physical properties of current injected magnetic powders.

[0206] like Figure 2 The diagram shown is a functional block diagram of an injection magnetic powder activity enhancement and uniform modification system provided in an embodiment of the present invention.

[0207] The magnetic powder activity enhancement and homogenization modification system 100 of this invention can be installed in an electronic device. Depending on the functions implemented, the magnetic powder activity enhancement and homogenization modification system 100 may include a preparation item combination module 101, an index interval change rate calculation module 102, an associated preparation combination set identification module 103, and an magnetic powder homogenization modification module 104. The module described in this invention can also be called a unit, referring to a series of computer program segments that can be executed by the processor of an electronic device and perform a fixed function, stored in the memory of the electronic device.

[0208] The preparation project combination module 101 is used to set the grinding-annealing combination sequence, the annealing-holding combination sequence, and the grinding-holding combination sequence according to the preset grinding time sequence, annealing temperature sequence, and annealing holding time sequence.

[0209] The index interval change rate calculation module 102 is used to sequentially extract the annealing-holding combination from the annealing-holding combination sequence; according to the grinding time sequence and the annealing-holding combination, it performs index testing using a preset magnetic powder activity index set to obtain a grinding activity index interval set, calculates the grinding index interval change rate set corresponding to the grinding activity index interval set, and obtains multiple sets of grinding index interval change rate sets, wherein the magnetic powder activity index set includes: remanence, compact density, intrinsic coercivity, and average particle size; sequentially extracts the grinding-holding combination from the grinding-holding combination sequence; according to the annealing time sequence... The temperature sequence and grinding-holding combination were used to test the magnetic powder activity index set to obtain the annealing activity index interval set. The change rate set of the annealing index interval corresponding to the annealing activity index interval set was calculated to obtain multiple sets of annealing index interval change rate sets. The grinding-annealing combination was extracted sequentially from the grinding-annealing combination sequence. The magnetic powder activity index set was tested according to the annealing and holding time series and the grinding-annealing combination to obtain the holding activity index interval set. The change rate set of the holding activity index interval corresponding to the holding activity index interval set was calculated to obtain multiple sets of holding index interval change rate sets.

[0210] The associated preparation combination set identification module 103 is used to sequentially extract magnetic powder activity indicators from the magnetic powder activity indicator set, identify the maximum indicator change rate based on the magnetic powder activity indicator change rate set in the grinding indicator interval change rate set, annealing indicator interval change rate set, and heat preservation indicator interval change rate set, and obtain the maximum indicator change rate set; and identify the associated preparation combination set corresponding to the maximum indicator change rate set.

[0211] The injection magnetic powder uniform modification module 104 is used to identify the target preparation combination corresponding to the preset current modification index in the associated preparation combination set, identify the self-variant preparation items of the target preparation combination, and perform uniform modification of the injection magnetic powder according to the self-variant preparation items and the target preparation combination.

[0212] In detail, the modules in the magnetic powder activity enhancement and uniform modification system 100 described in this embodiment of the invention employ the same methods as described above during use. Figure 1 The method for enhancing the activity of injected magnetic powder described herein is the same as that for uniform modification, and it can produce the same technical effect, so it will not be elaborated here.

[0213] like Figure 3 The diagram shown is a schematic representation of an electronic device that implements a method for enhancing the activity and uniformly modifying injected magnetic powder, according to an embodiment of the present invention.

[0214] The electronic device 1 may include a processor 10, a memory 11 and a bus 12, and may also include a computer program stored in the memory 11 and executable on the processor 10, such as a method program for enhancing the activity and uniformly modifying injected magnetic powder.

[0215] The memory 11 includes at least one type of readable storage medium, such as flash memory, portable hard drive, multimedia card, card-type memory (e.g., SD or DX memory), magnetic memory, magnetic disk, optical disk, etc. In some embodiments, the memory 11 can be an internal storage unit of the electronic device 1, such as a portable hard drive. In other embodiments, the memory 11 can be an external storage device of the electronic device 1, such as a plug-in portable hard drive, smart media card (SMC), secure digital card (SD), flash card, etc., equipped on the electronic device 1. Furthermore, the memory 11 includes both internal storage units and external storage devices of the electronic device 1. The memory 11 can be used not only to store application software and various types of data installed on the electronic device 1, such as the code of a method for enhancing the activity and uniformly modifying injected magnetic powder, but also to temporarily store data that has been output or will be output.

[0216] In some embodiments, the processor 10 may be composed of integrated circuits, such as a single packaged integrated circuit or multiple integrated circuits with the same or different functions, including combinations of one or more central processing units (CPUs), microprocessors, digital processing chips, graphics processors, and various control chips. The processor 10 is the control unit of the electronic device, connecting various components of the entire electronic device through various interfaces and lines. It executes programs or modules stored in the memory 11 (e.g., a method for enhancing the activity and homogenizing the injected magnetic powder), and calls data stored in the memory 11 to perform various functions of the electronic device 1 and process data.

[0217] The bus 12 can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus 12 can be divided into an address bus, a data bus, a control bus, etc. The bus 12 is configured to realize the connection and communication between the memory 11 and at least one processor 10, etc.

[0218] Figure 3 Only electronic devices with components are shown; those skilled in the art will understand that... Figure 3 The structure shown does not constitute a limitation on the electronic device 1, and may include fewer or more components than shown, or combine certain components, or have different component arrangements.

[0219] For example, although not shown, the electronic device 1 may also include a power supply (such as a battery) to power the various components. Preferably, the power supply can be logically connected to the at least one processor 10 through a power management device, thereby enabling functions such as charging management, discharging management, and power consumption management. The power supply may also include one or more DC or AC power supplies, recharging devices, power fault detection circuits, power converters or inverters, power status indicators, and other arbitrary components. The electronic device 1 may also include various sensors, Bluetooth modules, Wi-Fi modules, etc., which will not be described in detail here.

[0220] Furthermore, the electronic device 1 may also include a network interface. Optionally, the network interface may include a wired interface and / or a wireless interface (such as a Wi-Fi interface, a Bluetooth interface, etc.), which is typically used to establish communication connections between the electronic device 1 and other electronic devices.

[0221] Optionally, the electronic device 1 may further include a user interface, which may be a display, an input unit (such as a keyboard), and optionally, a standard wired interface or a wireless interface. Optionally, in some embodiments, the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, or an OLED (Organic Light-Emitting Diode) touchscreen, etc. The display may also be appropriately referred to as a screen or display unit, used to display information processed in the electronic device 1 and to display a visual user interface.

[0222] The program for enhancing the activity and uniformly modifying injected magnetic powder stored in the memory 11 of the electronic device 1 is a combination of multiple instructions. When run in the processor 10, it can achieve the following:

[0223] Set up grinding-annealing combination sequences, annealing-holding combination sequences, and grinding-holding combination sequences according to the preset grinding time sequence, annealing temperature sequence, and annealing holding time sequence;

[0224] Extract the annealing-holding combination sequentially from the annealing-holding combination sequence;

[0225] Based on the grinding time series and annealing-holding combination, the index test is carried out using the preset magnetic powder activity index set to obtain the grinding activity index interval set. The grinding index interval change rate set corresponding to the grinding activity index interval set is calculated to obtain multiple sets of grinding index interval change rate sets. Among them, the magnetic powder activity index set includes: remanence, compact density, intrinsic coercivity, and average particle size.

[0226] Extract the grinding-heat preservation combination sequentially from the grinding-heat preservation combination sequence;

[0227] Based on the annealing temperature sequence and the grinding-holding combination, the magnetic powder activity index set is used to test the index, and the annealing activity index interval set is obtained. The annealing index interval change rate set corresponding to the annealing activity index interval set is calculated, and multiple sets of annealing index interval change rate sets are obtained.

[0228] Extract grinding-annealing combinations sequentially from the grinding-annealing combination sequence;

[0229] Based on the annealing and heat preservation time series and the grinding-annealing combination, the magnetic powder activity index set is tested to obtain the heat preservation activity index interval set. The heat preservation index interval change rate set corresponding to the heat preservation activity index interval set is calculated to obtain multiple sets of heat preservation index interval change rate sets.

[0230] Magnetic powder activity indicators are extracted sequentially from the set of magnetic powder activity indicators. Based on the set of change rates of magnetic powder activity indicators in the grinding index interval, the set of change rates of annealing index interval, and the set of change rates of heat preservation index interval, the maximum index change rate is identified to obtain the set of maximum index change rates.

[0231] Identify the associated combination set corresponding to the set of the largest rate of change of indicators;

[0232] Identify the target preparation combination corresponding to the preset current modification index in the associated preparation combination set, identify the self-variant preparation items of the target preparation combination, and uniformly modify the injected magnetic powder according to the self-variant preparation items and the target preparation combination.

[0233] Specifically, the processor 10's implementation method for the above instructions can be found in [reference needed]. Figures 1 to 3 The descriptions of the relevant steps in the corresponding embodiments are not repeated here.

[0234] Furthermore, if the modules / units integrated in the electronic device 1 are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. The computer-readable storage medium can be volatile or non-volatile. For example, the computer-readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a portable hard drive, a magnetic disk, an optical disk, a computer memory, or a read-only memory (ROM).

[0235] The present invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor of an electronic device, can perform the following:

[0236] Set up grinding-annealing combination sequences, annealing-holding combination sequences, and grinding-holding combination sequences according to the preset grinding time sequence, annealing temperature sequence, and annealing holding time sequence;

[0237] Extract the annealing-holding combination sequentially from the annealing-holding combination sequence;

[0238] Based on the grinding time series and annealing-holding combination, the index test is carried out using the preset magnetic powder activity index set to obtain the grinding activity index interval set. The grinding index interval change rate set corresponding to the grinding activity index interval set is calculated to obtain multiple sets of grinding index interval change rate sets. Among them, the magnetic powder activity index set includes: remanence, compact density, intrinsic coercivity, and average particle size.

[0239] Extract the grinding-heat preservation combination sequentially from the grinding-heat preservation combination sequence;

[0240] Based on the annealing temperature sequence and the grinding-holding combination, the magnetic powder activity index set is used to test the index, and the annealing activity index interval set is obtained. The annealing index interval change rate set corresponding to the annealing activity index interval set is calculated, and multiple sets of annealing index interval change rate sets are obtained.

[0241] Extract grinding-annealing combinations sequentially from the grinding-annealing combination sequence;

[0242] Based on the annealing and heat preservation time series and the grinding-annealing combination, the magnetic powder activity index set is tested to obtain the heat preservation activity index interval set. The heat preservation index interval change rate set corresponding to the heat preservation activity index interval set is calculated to obtain multiple sets of heat preservation index interval change rate sets.

[0243] Magnetic powder activity indicators are extracted sequentially from the set of magnetic powder activity indicators. Based on the set of change rates of magnetic powder activity indicators in the grinding index interval, the set of change rates of annealing index interval, and the set of change rates of heat preservation index interval, the maximum index change rate is identified to obtain the set of maximum index change rates.

[0244] Identify the associated combination set corresponding to the set of the largest rate of change of indicators;

[0245] Identify the target preparation combination corresponding to the preset current modification index in the associated preparation combination set, identify the self-variant preparation items of the target preparation combination, and uniformly modify the injected magnetic powder according to the self-variant preparation items and the target preparation combination.

[0246] In the embodiments provided by this invention, it should be understood that the disclosed devices, systems, and methods can be implemented in other ways. For example, the system embodiments described above are merely illustrative, and actual implementations may have other classification methods.

[0247] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0248] Furthermore, the functional modules in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or in the form of hardware plus software functional modules.

[0249] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

[0250] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A method for enhancing the activity and uniformly modifying injected magnetic powder, characterized in that, The method includes: Set up grinding-annealing combination sequences, annealing-holding combination sequences, and grinding-holding combination sequences according to the preset grinding time sequence, annealing temperature sequence, and annealing holding time sequence; Extract the annealing-holding combination sequentially from the annealing-holding combination sequence; Based on the grinding time series and annealing-holding combination, the index test is carried out using the preset magnetic powder activity index set to obtain the grinding activity index interval set. The grinding index interval change rate set corresponding to the grinding activity index interval set is calculated to obtain multiple sets of grinding index interval change rate sets. Among them, the magnetic powder activity index set includes: remanence, compact density, intrinsic coercivity, and average particle size. Extract the grinding-heat preservation combination sequentially from the grinding-heat preservation combination sequence; Based on the annealing temperature sequence and the grinding-holding combination, the magnetic powder activity index set is used to test the index, obtain the annealing activity index interval set, calculate the annealing index interval change rate set corresponding to the annealing activity index interval set, and obtain multiple sets of annealing index interval change rate sets. Extract grinding-annealing combinations sequentially from the grinding-annealing combination sequence; Based on the annealing and heat preservation time series and the grinding-annealing combination, the magnetic powder activity index set is tested to obtain the heat preservation activity index interval set. The heat preservation index interval change rate set corresponding to the heat preservation activity index interval set is calculated to obtain multiple sets of heat preservation index interval change rate sets. Magnetic powder activity indicators are extracted sequentially from the set of magnetic powder activity indicators. Based on the set of change rates of magnetic powder activity indicators in the grinding index interval, the set of change rates of annealing index interval, and the set of change rates of heat preservation index interval, the maximum index change rate is identified to obtain the set of maximum index change rates. Identify the associated combination set corresponding to the set of largest index change rates; Identify the target preparation combination corresponding to the preset current modification index in the associated preparation combination set, identify the self-variant preparation items of the target preparation combination, and uniformly modify the injected magnetic powder according to the self-variant preparation items and the target preparation combination.

2. The method for enhancing the activity and uniformly modifying injected magnetic powder as described in claim 1, characterized in that, The step of setting the grinding-annealing combination sequence, annealing-holding combination sequence, and grinding-holding combination sequence according to the preset grinding time sequence, annealing temperature sequence, and annealing holding time sequence includes: The grinding time sequence and annealing temperature sequence are combined to obtain a grinding-annealing combined sequence, wherein the number of grinding times in the grinding time sequence is [missing information]. The number of annealing temperatures in the annealing temperature sequence is The number of grinding-annealing combinations in the grinding-annealing combination sequence is ; The annealing temperature sequence and annealing holding time sequence are combined to obtain an annealing-holding combination sequence, wherein the number of annealing holding times in the annealing holding time sequence is [missing information]. The number of annealing-holding combinations in the annealing-holding combination sequence is ; The grinding time sequence and the annealing holding time sequence are combined to obtain a grinding-holding combination sequence, wherein the number of grinding-holding combinations in the grinding-holding combination sequence is: .

3. The method for enhancing the activity and uniformly modifying injected magnetic powder as described in claim 2, characterized in that, The process involves testing the grinding activity indexes using a pre-defined set of magnetic powder activity indexes based on the grinding time sequence and the annealing-holding combination, to obtain a set of grinding activity index intervals, including: Magnetic powder activity indicators were extracted sequentially from the set of magnetic powder activity indicators. The grinding time is extracted sequentially from the grinding time sequence, and the pre-obtained ferrite magnetic powder is processed according to the grinding time and annealing-holding combination to obtain injection magnetic powder; The injected magnetic powder is subjected to single-index testing based on the magnetic powder activity index to obtain a grinding activity index test value set, wherein the grinding activity index test value in the grinding activity index test value set corresponds one-to-one with the grinding time. Identify the minimum and maximum grinding index test values ​​in the set of grinding activity index test values; The grinding activity index range is determined based on the minimum and maximum grinding index test values. By collecting the grinding activity index intervals corresponding to each magnetic powder activity index, a grinding activity index interval set is obtained.

4. The method for enhancing the activity and uniformly modifying injected magnetic powder as described in claim 3, characterized in that, The calculation of the grinding activity index interval set corresponds to the grinding index interval change rate set, resulting in multiple sets of grinding index interval change rate sets, including: The grinding activity index intervals are extracted sequentially from the set of grinding activity index intervals; Identify the minimum grinding time corresponding to the minimum grinding index test value and the maximum grinding time corresponding to the maximum grinding index test value within the grinding activity index range; Calculate the grinding time difference based on the minimum and maximum grinding times; Identify the grinding interval difference of the grinding activity index range, wherein the grinding interval difference refers to the difference between the maximum grinding index test value and the minimum grinding index test value; The grinding index interval change rate is calculated based on the grinding interval difference and grinding time difference to obtain the grinding index interval change rate set; By summarizing the set of variation rates of grinding index intervals corresponding to each annealing-holding combination, multiple sets of variation rates of grinding index intervals are obtained.

5. The method for enhancing the activity and uniformly modifying injected magnetic powder as described in claim 4, characterized in that, The step of identifying the maximum rate of change of the magnetic powder activity index within the sets of change rates of the grinding index, annealing index, and heat preservation index intervals, and obtaining the set of maximum rate of change of the index, includes: Identify the in-group grinding index change rate corresponding to the magnetic powder activity index within the set of change rates of the grinding index range; The change rate of grinding index within each group corresponding to each annealing-holding combination is collected to obtain the set of change rates of grinding index within each group; The maximum rate of change of grinding index within the group is identified from the set of rate of change of grinding index within the group. Identify the in-group annealing index change rate corresponding to the magnetic powder activity index within the set of change rates of the annealing index range; The change rates of annealing indices within each group corresponding to each grinding-heating combination are collected to obtain the set of change rates of annealing indices within each group. Identify the largest rate of change of annealing index within the set of rates of change of annealing index within the group; Identify the change rate of the thermal insulation index within the group corresponding to the magnetic powder activity index from the set of change rates of the thermal insulation index range; The change rate of the insulation index within each group corresponding to each grinding-annealing combination is collected to obtain the set of change rates of the insulation index within the group. The maximum rate of change of thermal insulation index within the group is identified from the set of rates of change of thermal insulation index within the group. The maximum index change rate is selected from the maximum group grinding index change rate, the maximum group annealing index change rate, and the maximum group heat preservation index change rate. The maximum index change rate refers to the maximum value among the maximum group grinding index change rate, the maximum group annealing index change rate, and the maximum group heat preservation index change rate. The maximum rate of change of each magnetic powder activity index is collected to obtain the set of maximum rate of change of index.

6. The method for enhancing the activity and uniformly modifying injected magnetic powder as described in claim 5, characterized in that, The step of identifying the target preparation combination corresponding to the preset current modification index in the associated preparation combination set includes: Identify the rate of change of the modified index corresponding to the current modified index from the set of maximum rate of change of the modified index, wherein the rate of change of the modified index refers to the maximum rate of change of the modified index corresponding to the current modified index. Identify the target preparation combination corresponding to the rate of change of the modified index in the set of associated preparation combinations, wherein the target preparation combination refers to the associated preparation combination corresponding to the rate of change of the modified index.

7. The method for enhancing the activity and uniformly modifying injected magnetic powder as described in claim 6, characterized in that, The self-preparation items of the identified target preparation combination include: Determine whether the target preparation combination is a grinding-annealing combination; If the target preparation combination is a grinding-annealing combination, then the variable preparation item is the annealing holding time; If the target preparation combination is not a grinding-annealing combination, then determine whether the target preparation combination is an annealing-heat preservation combination; If the target preparation combination is an annealing-holding combination, then the variable preparation item is the grinding time; If the target preparation combination is not an annealing-holding combination, then the variable preparation item is the annealing temperature.

8. The method for enhancing the activity and uniformly modifying injected magnetic powder as described in claim 7, characterized in that, The process of uniformly modifying the injected magnetic powder according to the self-modification project and the target preparation combination includes: Receive a sequence of target uniformity index test values, and extract the target uniformity index test values ​​sequentially from the sequence of target uniformity index test values; Identify the preparation project category of the self-variant preparation project; If the preparation item category is grinding time, then the first adjacent grinding activity index test value and the second adjacent grinding activity index test value of the target uniformity index test value are identified in the grinding activity index test value set. The first adjacent grinding activity index test value refers to the grinding activity index test value that is first close to the target uniformity index test value, and the second adjacent grinding activity index test value refers to the grinding activity index test value that is second close to the target uniformity index test value. The first grinding time and the second grinding time corresponding to the first adjacent grinding activity index test value and the second adjacent grinding activity index test value are identified respectively, and the grinding time self-variation range is determined based on the first grinding time and the second grinding time. The grinding time is dynamically adjusted according to the self-variable range of the grinding time to obtain the dynamic grinding time; Test injection magnetic powder is prepared based on the dynamic grinding time and target preparation combination, and the actual index test value of the test injection magnetic powder with respect to the current modification index is identified. Determine whether the actual indicator test value is equal to the target uniformity indicator test value; If the actual index test value is not equal to the target uniformity index test value, then return to the above steps of dynamically adjusting the grinding time according to the grinding time self-variation range; If the actual index test value is equal to the target uniformity index test value, then the dynamic grinding time is taken as the target uniformity grinding test time. Collect all the target uniformity index test values ​​and corresponding target uniformity grinding test times to obtain the target uniformity grinding test time set; The injection magnetic powder is uniformly modified according to the target uniform grinding test time set and the target preparation combination; If the preparation item category is annealing temperature, then obtain the set of annealing activity index test values; In the set of annealing activity index test values, a first adjacent annealing activity index test value and a second adjacent annealing activity index test value of the target uniformity index test value are identified. The first adjacent annealing activity index test value refers to the annealing activity index test value that is first close to the target uniformity index test value, and the second adjacent annealing activity index test value refers to the annealing activity index test value that is second close to the target uniformity index test value. Identify the first annealing temperature and the second annealing temperature corresponding to the first adjacent annealing activity index test value and the second adjacent annealing activity index test value respectively, and determine the annealing temperature self-variation range based on the first annealing temperature and the second annealing temperature. The annealing temperature is dynamically adjusted according to the self-variable range of the annealing temperature to obtain the dynamic annealing temperature; Test injection magnetic powder is prepared based on the dynamic annealing temperature and target preparation combination, and the actual index test value of the test injection magnetic powder with respect to the current modification index is identified. Determine whether the actual indicator test value is equal to the target uniformity indicator test value; If the actual index test value is not equal to the target uniformity index test value, then return to the above steps of dynamically adjusting the annealing temperature according to the annealing temperature self-variation range; If the actual index test value is equal to the target uniformity index test value, then the dynamic annealing temperature is taken as the target uniformity annealing test temperature. Collect all the target uniformity index test values ​​and corresponding target uniformity annealing test temperatures to obtain the target uniformity annealing test temperature set; The injection magnetic powder is uniformly modified according to the target uniform annealing test temperature set and the target preparation combination; If the preparation item category is annealing and heat preservation time, then obtain the set of test values ​​for heat preservation activity index; Identify the target uniform heat preservation test time set based on the set of heat preservation activity index test values ​​and the target uniformity index test values; The injected magnetic powder is uniformly modified according to the target uniform heat preservation test time set and the target preparation combination.

9. The method for enhancing the activity and uniformly modifying injected magnetic powder as described in claim 8, characterized in that, The step of identifying the target uniform heat preservation test time set based on the heat preservation activity index test value set and the target uniformity index test value includes: In the set of thermal insulation activity index test values, the first adjacent thermal insulation activity index test value and the second adjacent thermal insulation activity index test value of the target uniformity index test value are identified. The first adjacent thermal insulation activity index test value refers to the thermal insulation activity index test value that is first close to the target uniformity index test value, and the second adjacent thermal insulation activity index test value refers to the thermal insulation activity index test value that is second close to the target uniformity index test value. Identify the first and second insulation times corresponding to the first and second adjacent insulation activity index test values, respectively, and determine the insulation time range based on the first and second insulation times. The heat preservation time is dynamically adjusted according to the heat preservation time variable range to obtain the dynamic heat preservation time; Based on the dynamic heat preservation time and the target preparation combination, test injection magnetic powder is prepared, and the actual index test value of the test injection magnetic powder with respect to the current modification index is identified. Determine whether the actual indicator test value is equal to the target uniformity indicator test value; If the actual index test value is not equal to the target uniform index test value, then return to the above steps of dynamically adjusting the heat preservation time according to the heat preservation time self-variation range; If the actual index test value is equal to the target uniform index test value, then the dynamic heat preservation time is taken as the target uniform heat preservation test time. Collect the target uniform heat preservation test times corresponding to all target uniformity index test values ​​to obtain the target uniform heat preservation test time set.

10. A system for enhancing the activity and uniformly modifying injected magnetic powder, characterized in that, The system includes: The preparation project combination module is used to set the grinding-annealing combination sequence, annealing-holding combination sequence, and grinding-holding combination sequence according to the preset grinding time sequence, annealing temperature sequence, and annealing holding time sequence; The index interval change rate calculation module is used to sequentially extract the annealing-holding combination from the annealing-holding combination sequence; based on the grinding time sequence and the annealing-holding combination, it performs index tests using a preset magnetic powder activity index set to obtain a grinding activity index interval set, calculates the grinding index interval change rate set corresponding to the grinding activity index interval set, and obtains multiple sets of grinding index interval change rate sets. The magnetic powder activity index set includes: remanence, compact density, intrinsic coercivity, and average particle size; it sequentially extracts the grinding-holding combination from the grinding-holding combination sequence; and calculates the grinding index interval change rate set corresponding to the annealing temperature. The sequence and grinding-annealing combination were used to test the magnetic powder activity index set to obtain the annealing activity index interval set. The change rate set of the annealing index interval corresponding to the annealing activity index interval set was calculated to obtain multiple sets of annealing index interval change rate sets. The grinding-annealing combination was extracted sequentially from the grinding-annealing combination sequence. The magnetic powder activity index set was tested according to the annealing and holding time series and the grinding-annealing combination to obtain the holding activity index interval set. The change rate set of the holding activity index interval corresponding to the holding activity index interval set was calculated to obtain multiple sets of holding index interval change rate sets. The associated preparation combination set identification module is used to sequentially extract magnetic powder activity indicators from the magnetic powder activity indicator set, identify the maximum indicator change rate based on the change rate sets of the magnetic powder activity indicators in the grinding indicator interval, annealing indicator interval, and heat preservation indicator interval, and obtain the maximum indicator change rate set; and identify the associated preparation combination set corresponding to the maximum indicator change rate set. The injection magnetic powder uniform modification module is used to identify the target preparation combination corresponding to the preset current modification index in the associated preparation combination set, identify the independent preparation items of the target preparation combination, and perform uniform modification of the injection magnetic powder according to the independent preparation items and the target preparation combination.

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