System and method for detecting cobalt (nickel, iron) content and specific saturation magnetization of hard alloy

Abstract

The invention discloses a hard alloy cobalt (nickel, iron) content and specific saturation magnetization detection system and method, and the detection system comprises a sample loading module, a length measurement module, a weighing module, a test sample sending module, a permanent magnet and sensor module, a standard sample placement module, a sample sorting module, a computer data processing and display module, and a control module. The detection method comprises the following steps: performing automatic calibration through a system, and calculating a calibration coefficient by using an induced current generated in a magnetic flux sensor when a standard sample is magnetized in a permanent magnetic field and then exits; placing the test samples in batches, detecting the test samples by an infrared sensor, and sequentially measuring the length and weighing the mass; magnetizing the sample in the permanent magnet, detecting induced current by the magnetic flux sensor when the sample exits, collecting data by the data collector and transmitting the data to a computer host, and calculating the content of magnetic cobalt (nickel, iron) and the specific saturation magnetization value by combining mass and length information; according to a calculation result and preset sorting information, the sample is placed at a corresponding position, and full-automatic detection and sorting of the cobalt (nickel, iron) content and the specific saturation magnetization intensity of the hard alloy are achieved.

Description

Technical Field

[0001] This invention relates to the field of magnetic property testing of cemented carbide, specifically to a system and method for detecting the cobalt (nickel, iron) content and specific saturation magnetization of cemented carbide. Background Technology

[0002] As an important engineering material, cemented carbide has been widely used in many fields such as machining, mining, electronics, and aerospace due to its excellent properties such as high hardness, high wear resistance, and high strength. Among these, the cobalt (nickel, iron) content and specific saturation magnetization of cemented carbide are key magnetic performance parameters for evaluating its properties, playing a crucial role in quality control, performance optimization, and application adaptation.

[0003] Currently, there are many problems that urgently need to be solved in the testing process of cemented carbide. First, the testing process is highly dependent on manual operation. From the sample loading stage, each sample needs to be placed manually into the testing position. This not only consumes a lot of time and manpower, but also, due to the randomness and instability of manual operation, easily leads to inaccurate sample placement, thus affecting the accuracy and consistency of the test results. Regarding sample length measurement, traditional methods typically use calipers and other tools manually. This measurement method is not only inefficient, but its accuracy is also easily affected by factors such as the operator's skill level, measuring force, and visual errors, leading to significant deviations in the measurement results. For the mass weighing stage, although the use of electronic balances has improved the accuracy of weighing to some extent, the manual handling of samples can still introduce errors, and when testing large batches of samples, the speed of manual operation is far from meeting the needs of actual production.

[0004] After the basic parameters of the sample are measured, the magnetic property detection stage begins. Traditional detection methods lack precise control over the magnetization process and induced current detection, making it difficult to ensure that the sample reaches complete specific saturation magnetization within the permanent magnet. Consequently, the detected induced current cannot accurately reflect the content of magnetic cobalt (nickel, iron) in the sample. Furthermore, data acquisition and processing rely primarily on manual recording and simple calculations, which are prone to errors and involve cumbersome calculations, failing to provide quick and accurate results.

[0005] Furthermore, traditional testing methods have significant shortcomings in the sample sorting stage. Due to the lack of automated sorting mechanisms, samples after testing need to be manually classified and stored according to the test results. This not only increases the workload of staff but also easily leads to sorting errors, causing samples with different properties to be mixed up, which affects subsequent production and use.

[0006] With the rapid development of modern industry, increasingly higher demands are being placed on the quality and production efficiency of cemented carbide. Traditional testing methods, due to their low efficiency, large errors, and cumbersome processes, can no longer meet the needs of large-scale, high-precision production testing. Summary of the Invention

[0007] To address the shortcomings of existing technologies, the present invention aims to provide a detection system and method for the cobalt (nickel, iron) content and specific saturation magnetization of cemented carbide. This system solves the problems of low efficiency and high cost due to reliance on manual labor in traditional detection methods, large errors and inaccurate data due to manual measurement, inaccurate magnetization control affecting the reliability of results, and easy errors and sample confusion during manual sorting. The invention achieves automated, high-precision and accurate sorting and detection.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a detection system for the cobalt (nickel, iron) content and specific saturation magnetization of cemented carbide, comprising:

[0009] The sample loading module includes a sample loading screw, a sample loading motor, a sample storage hopper, an infrared sensor, a ejector pin, a single sample storage slot, and a sample handling robotic claw. The sample handling robotic claw is connected to the sample loading screw via a transmission mechanism, and the sample loading motor drives the sample loading screw. The infrared sensor is located on the single sample storage slot and is used to detect whether there is a sample above the single sample storage slot. The ejector pin is located on the side of the single sample storage slot and is used to push the sample to be tested into the single sample storage slot. The sample storage hopper is located on one side of the single sample storage slot and is used to store the sample to be tested.

[0010] The length measurement module includes a contact switch, a length measuring lead screw, and a length measuring stepper motor; the contact switch is connected to the length measuring lead screw via a transmission; the length measuring lead screw and the length measuring stepper motor are located on the other side of a single sample storage slot, and the length measuring stepper motor is used to drive the length measuring lead screw;

[0011] The weighing module includes an electronic balance and a balance layout slot; the balance layout slot is located above the electronic balance.

[0012] The test sample delivery module includes a test sample placement slot, a test guide rail, a test stepper motor, a connecting component, and a test drive belt. The test sample placement slot is located on the test guide rail and can move up and down along the test guide rail. The test drive belt is located around the test guide rail, and the test stepper motor drives the test drive belt. The connecting component is located between the test drive belt and the test sample placement slot and is used to connect the test drive belt and the test sample placement slot.

[0013] A permanent magnet and sensor module includes a permanent magnet and a magnetic flux sensor. The permanent magnet and the magnetic flux sensor are cylindrical. The test rail passes through the permanent magnet and the magnetic flux sensor, and the center lines of the permanent magnet and the magnetic flux sensor coincide with the test rail. The magnetic flux sensor is located between the permanent magnet and the test rail.

[0014] The standard sample placement module includes a standard sample placement slot for storing standard samples;

[0015] The sample sorting module includes a sorting and transporting robotic claw, a sorting and placing trough, a sorting motor, and a sorting screw. The sorting and transporting robotic claw is connected to the sorting screw via a transmission, and the sorting motor is used to drive the sorting screw.

[0016] Preferably, the detection system further includes a computer data processing and display module, which consists of a monitor and a computer host.

[0017] Preferably, the detection system further includes a control module, which consists of a PLC controller and a USB data acquisition unit.

[0018] Preferably, the test stepper motors are symmetrically arranged at both ends of the test transmission belt, and the number of test stepper motors is two.

[0019] Preferably, the sorting screw and the sample loading screw are arranged in parallel.

[0020] This invention also provides a method for detecting the cobalt (nickel, iron) content and specific saturation magnetization of cemented carbide, comprising the following steps:

[0021] Step 1: The PLC controller starts the system for automatic calibration. After receiving the instruction, the sorting and transporting robot gripper picks up the cemented carbide standard sample from the standard lofting slot and places it into the test lofting slot. The PLC controller controls the test stepper motor to rotate, transferring the test lofting slot and the cemented carbide sample into the permanent magnet for magnetization. The magnetization time is t seconds, until the sample reaches saturation magnetization. The PLC controller then controls the test stepper motor to rotate in the reverse direction, quickly removing the test lofting slot and the cemented carbide sample from the permanent magnet. During the removal process, an induced current is generated in the magnetic flux sensor. The induced current is detected by the data acquisition device, and the collected data is sent to the computer host for data processing to calculate the calibration coefficient K.

[0022] Step 2: Place the cemented carbide test samples in batches in the sample storage hopper. The PLC controller starts the equipment. The infrared sensor located on the single sample storage slot detects whether there is a sample above. If there is no sample, the PLC controller starts the ejector pin to push a cemented carbide sample into the single sample storage slot.

[0023] Step 3: The infrared sensor detects the presence of a hard alloy sample in the single sample storage slot. The PLC controller starts the length measuring stepper motor, which drives the contact switch on the length measuring lead screw to move closer to one end of the sample. When the contact switch is pushed down by the sample, the contact switch is turned on. After the PLC controller detects the on signal, it stops the length measuring stepper motor from rotating and records the number of travel pulses N of the stepper motor.

[0024] Step 4: Calculate the length of the cemented carbide sample based on the total length L of the single sample storage slot, the number of travel pulses N of the stepper motor, and the lead screw advance distance corresponding to each pulse, and transmit the result to the computer host via the PLC controller.

[0025] Step 5: After the length measurement is completed, the PLC controller controls the sample handling machine claw to pick up the cemented carbide sample from the single sample storage slot and place it into the balance sample placement slot. The electronic balance weighs the sample and transmits the mass information to the computer host.

[0026] Step 6: After the mass measurement is completed, the PLC controller controls the sample handling machine claw to pick up the cemented carbide sample from the balance sample placement slot and place it into the test sample placement slot. The PLC controller controls the test stepper motor to rotate, and the test sample placement slot and the cemented carbide sample in it are transferred into the permanent magnet for magnetization. The magnetization time is t seconds, so that the sample reaches the saturation magnetization intensity.

[0027] Step 7: The PLC controller controls the test stepper motor to rotate in reverse, quickly removing the test sample tray and the sample inside from the permanent magnet. During the removal process, due to the principle of electromagnetic induction, an induced current is generated in the magnetic flux sensor. The generated induced current is proportional to the content of magnetic cobalt (nickel, iron) in the tested cemented carbide. The induced current is detected by the data acquisition device, and the collected data is sent to the computer host for data processing. Combined with the mass and length information of the cemented carbide, the magnetic cobalt (nickel, iron) content and specific saturation magnetization value of the sample are calculated. After the sample is removed, the PLC controller controls the sorting and transporting robot claw to pick up the cemented carbide sample from the test sample tray and place it into the standard sample tray.

[0028] Step 8: Based on the calculation results and the sorting information preset in the computer program, the computer host determines the position where the cemented carbide sample should be placed in the sorting and placement tank, and sends the information to the PLC controller. The PLC controller sends an instruction to place the tested sample into the corresponding position in the sorting and placement tank through the sorting and handling machine claw.

[0029] In some preferred embodiments, step one specifically includes:

[0030] 1) Data acquisition and recording: The data acquisition unit converts the induced current generated by the magnetic flux sensor into a voltage value through the acquisition resistor, accurately detects the magnitude of the induced voltage generated by the magnetic flux sensor, and sends the data to the computer host.

[0031] 2) Based on the direct proportionality between the induced voltage and the magnetic cobalt (nickel, iron) content in the tested cemented carbide, and combined with the mass and length information of the cemented carbide standard sample pre-stored in the computer host, the computer host uses a preset algorithm to calculate the currently measured magnetic cobalt (nickel, iron) content. and specific saturation magnetization value ;

[0032] 3) Pre-store the standard saturation magnetization value of the cemented carbide standard sample in the computer host. The retrieved value is compared with the currently measured specific saturation magnetization value. Compare;

[0033] 4) Calculate the calibration coefficient K: The formula for calculating the calibration coefficient K is as follows: This formula represents the ratio of the standard specific saturation magnetization value to the measured specific saturation magnetization value. This ratio can be used to calibrate subsequent measurement results to eliminate the influence of systematic errors and other factors on the measurement results.

[0034] 5) Storage and application of calibration coefficient K: The calculated calibration coefficient K is stored in a specific storage area of ​​the computer host so that the measurement results can be corrected when measuring other cemented carbide samples. When measuring the magnetic cobalt (nickel, iron) content and specific saturation magnetization of cemented carbide samples, the measurement results are multiplied by the calibration coefficient K to obtain the accurate measured value after calibration.

[0035] In some preferred embodiments, the calculation method for the length of the cemented carbide sample in step four is as follows:

[0036] In the cemented carbide sample length measurement system, the total length of a single sample storage slot is: It serves as a fixed reference for defining the sample placement space;

[0037] During measurement, the length measuring stepper motor drives the contact switch to push the sample to the reference point at the other end. At this time, the PLC controller records the total number of pulses of the stepper motor. And through pulse equivalent (That is, the distance the lead screw moves for each pulse) The actual forward distance of the pushing mechanism is calculated as follows:

[0038]

[0039] Because there is a known mechanical correlation between the distance the contact switch travels and the end of a single sample storage slot, the sample length... Through total length Subtract the forward travel distance of the contact switch The conclusion is:

[0040] .

[0041] Furthermore, in step 5), specifically:

[0042] 5.1) Integral processing of induced electromotive force: The induced voltage signal is integrated through the AD module of the data acquisition unit. ( The data was acquired, and due to interference, it was filtered using a third-order Butterworth low-pass digital filter. The filtered signal... for:

[0043]

[0044]

[0045] in, , These are third-order Butterworth parameters; The filtered first Voltage values ​​at each point;

[0046] 5.2) Integrate the digitally filtered signal to obtain the integral value. :

[0047]

[0048] 5.3) Magnetic cobalt (nickel, iron) content With integral value Proportional:

[0049]

[0050] in, This is a proportionality constant (which needs to be determined through calibration);

[0051] 5.4) Calculation of the percentage of magnetic cobalt (nickel, iron) content:

[0052] Percentage of magnetic cobalt (nickel, iron) content for:

[0053]

[0054] in, Total mass of the sample;

[0055] 5.5) Specific saturation magnetization ( ):

[0056]

[0057] in, It is the total saturation magnetic moment of the sample. It refers to the quality of the sample;

[0058] The cemented carbide sample consists of magnetic cobalt (nickel, iron) and non-magnetic components, and the influence of their interactions on magnetism is ignored. Under saturation magnetization, the sample's saturation magnetic moment is... Mainly composed of the saturation magnetic moment of magnetic cobalt The contribution of the magnetic moment of the non-magnetic component is negligible, that is... ;

[0059] 5.6) For magnetic cobalt (nickel, iron), its saturation magnetic moment Mass of magnetic cobalt (nickel, iron) The magnetic moment is directly proportional to the number of magnetic atoms. This is because the saturation magnetic moment of a magnetic material is determined by the ordered arrangement of its internal magnetic moments, and the number of magnetic moments is directly proportional to the number of magnetic atoms. Given a constant mass, the number of magnetic atoms is directly proportional to the mass, which can be expressed as:

[0060]

[0061] in, It is a proportionality constant that is related to factors such as the atomic magnetic moments and crystal structure of the magnetic components;

[0062] 5.7) will Substitute into the expression for the saturation magnetization From this, we can obtain:

[0063]

[0064] in, It is a proportionality constant, which is related to the magnetic material in the test sample. This represents the percentage of magnetic cobalt (nickel, iron) content.

[0065] 5.8) Multiply the measurement result by the calibration factor K to obtain the accurate measured value after calibration:

[0066] Since the length of the sample has a certain influence on the magnitude of the induced electromotive force, the final result needs to be corrected for the influence of the length:

[0067] This represents the length correction function, which linearly maps the input length to the correction coefficient.

[0068] Measured values ​​of magnetic cobalt (nickel, iron) content:

[0069]

[0070] Measured value of specific saturation magnetization:

[0071] .

[0072] The cobalt (nickel, iron) content and specific saturation magnetization detection system and method disclosed in this invention are innovative solutions addressing the numerous drawbacks of traditional detection methods. By integrating multiple modules such as automatic sample loading, automatic sample length measurement, automatic balance weighing, automatic test sample delivery, computer data processing and display, standard sample placement, sample sorting, permanent magnets and sensors, and control, the detection process is fully automated, greatly improving detection efficiency and accuracy. It effectively solves the problems faced by traditional detection methods and provides strong technical support for quality control and production efficiency improvement in the cemented carbide industry.

[0073] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0074] This invention achieves fully automated detection of cobalt (nickel, iron) content and specific saturation magnetization in cemented carbide, completely eliminating the cumbersome manual sample loading, measurement, and sorting processes required in traditional testing. This significantly improves testing efficiency, drastically shortens the testing cycle to meet the rapid testing needs of large-scale production, and significantly reduces labor costs, saving production costs and improving economic efficiency for enterprises. Regarding testing accuracy, automated precision measuring equipment is used for sample length measurement and mass weighing, avoiding errors caused by individual differences and subjective factors in manual operation, ensuring data accuracy. The precise control module ensures complete magnetic saturation of the sample during magnetization, allowing the induced current detected by the magnetic flux sensor to more accurately reflect the magnetic cobalt (nickel, iron) content, greatly improving the reliability and stability of the test results and providing precise evidence for cemented carbide quality control. Simultaneously, the complete and smooth fully automated testing process ensures seamless coordination between modules, avoiding interruptions and confusion caused by manual switching in traditional processes, improving the stability and consistency of the testing. Moreover, the precise sample sorting function, with the help of computer data processing and preset sorting information, allows the sorting and handling robot claws to accurately place samples with different properties, effectively preventing confusion and providing convenience for subsequent production and use. This improves the overall quality and efficiency of cemented carbide production and enhances the company's competitiveness in the market. Attached Figure Description

[0075] Figure 1 This is a schematic diagram of the structure of the present invention;

[0076] Figure 2 This is a flowchart illustrating the automated testing and sorting process of the system according to an embodiment of the present invention.

[0077] Figure 3 This is a flowchart illustrating the system calibration implementation process in an embodiment of the present invention.

[0078] Figure 4 This diagram illustrates the induced electromotive force acquired by the sensor and data acquisition module during sample testing, as shown in an embodiment of the present invention.

[0079] In the diagram, 1-sample loading screw; 2-sample loading motor; 3-sample storage hopper; 4-infrared sensor; 5-ejector pin; 6-single sample storage slot; 7-contact switch; 8-length measuring screw; 9-length measuring stepper motor; 10-sample handling machine gripper; 11-electronic balance; 12-balance sample placement slot; 13-test sample placement slot; 14-test guide rail; 15-test stepper motor; 16-connector; 17-test transmission belt; 18-display; 19-computer host; 20-standard sample placement slot; 21-sorting and handling machine gripper; 22-sorting sample placement slot; 23-sorting motor; 24-sorting screw; 25-permanent magnet; 26-magnetic flux sensor; 27-PLC controller; 28-USB data acquisition device. Detailed Implementation

[0080] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that comprises a series of steps or units is not limited to the listed steps or units, but in one possible example includes steps or units not listed, or in one possible example includes other steps or units inherent to these processes, methods, products, or apparatuses.

[0081] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0082] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0083] Example 1

[0084] A system for detecting the cobalt (nickel, iron) content and specific saturation magnetization of cemented carbide, such as Figure 1 As shown, it includes:

[0085] The sample loading module includes a sample loading screw 1, a sample loading motor 2, a sample storage hopper 3, an infrared sensor 4, a push pin 5, a single sample storage slot 6, and a sample handling robotic claw 10. The sample handling robotic claw 10 is connected to the sample loading screw 1 for transmission, and the sample loading motor 2 is used to drive the sample loading screw 1. The infrared sensor 4 is located on the single sample storage slot 6 and is used to detect whether there is a sample above the single sample storage slot 6. The push pin 5 is located on the side of the single sample storage slot 6 and is used to push the sample to be tested into the single sample storage slot 6. The sample storage hopper 3 is located on one side of the single sample storage slot 6 and is used to store the sample to be tested.

[0086] The length measurement module includes a contact switch 7, a length measuring lead screw 8, and a length measuring stepper motor 9; the contact switch 7 is connected to the length measuring lead screw 8 via a transmission; the length measuring lead screw 8 and the length measuring stepper motor 9 are located on the other side of the single sample storage slot 6, and the length measuring stepper motor 9 is used to drive the length measuring lead screw 8;

[0087] The weighing module includes an electronic balance 11 and a balance layout slot 12; the balance layout slot 12 is located above the electronic balance 11.

[0088] The test sample delivery module includes a test sample placement slot 13, a test guide rail 14, a test stepper motor 15, a connecting component 16, and a test drive belt 17. The test sample placement slot 13 is disposed on the test guide rail 14 and can move up and down along the test guide rail 14. The test drive belt 17 is disposed around the test guide rail 14, and the test stepper motor 15 is used to drive the test drive belt 17. The connecting component 16 is disposed between the test drive belt 17 and the test sample placement slot 13 and is used to connect the test drive belt 17 and the test sample placement slot 13.

[0089] The permanent magnet and sensor module includes a permanent magnet 25 and a magnetic flux sensor 26. The permanent magnet 25 and the magnetic flux sensor 26 are cylindrical bodies. The test rail 14 passes through the permanent magnet 25 and the magnetic flux sensor 26, and the center line of the permanent magnet 25 and the magnetic flux sensor 26 coincides with the test rail 14. The magnetic flux sensor 26 is located between the permanent magnet 25 and the test rail 14.

[0090] The standard sample placement module includes a standard sample placement slot 20 for storing standard samples;

[0091] The sample sorting module includes a sorting and transporting machine claw 21, a sorting and placing groove 22, a sorting motor 23, and a sorting screw 24. The sorting and transporting machine claw 21 is connected to the sorting screw 24 in a transmission connection, and the sorting motor 23 is used to drive the sorting screw 24.

[0092] Specifically, the detection system also includes a computer data processing and display module, which consists of a monitor 18 and a computer host 19.

[0093] Specifically, the detection system also includes a control module, which consists of a PLC controller 27 and a USB data acquisition unit 28.

[0094] Specifically, the test stepper motors 15 are symmetrically arranged at both ends of the test transmission belt 17, and the number of test stepper motors 15 is two.

[0095] Specifically, the sorting screw 24 and the sample loading screw 1 are set in parallel.

[0096] Example 2

[0097] A method for detecting the cobalt (nickel, iron) content and specific saturation magnetization of cemented carbide, comprising the following steps:

[0098] Step 1: The PLC controller 27 starts the system for automatic calibration. After receiving the instruction, the sorting and transporting robot claw 21 picks up the cemented carbide standard sample from the standard lofting slot 20 and places it into the test lofting slot 13. The PLC controller 27 controls the test stepper motor 15 to rotate, transferring the test lofting slot 13 and the cemented carbide sample therein into the permanent magnet 25 for magnetization. The magnetization time is t seconds, until the cemented carbide sample reaches saturation magnetization. The PLC controller 27 then controls the test stepper motor 15 to rotate in the reverse direction, quickly transferring the test lofting slot 13 and the cemented carbide sample therein from the permanent magnet 25. The magnet 25 is withdrawn. During the withdrawal process, due to the principle of electromagnetic induction, an induced current is generated in the magnetic flux sensor 26. The induced current is proportional to the magnetic cobalt (nickel, iron) content in the tested cemented carbide. The induced current is detected by the data acquisition device 28, and the collected data is sent to the computer host 19 for data processing. Combined with the mass and length information of the cemented carbide, the magnetic cobalt (nickel, iron) content and specific saturation magnetization value of the sample are calculated. The standard specific saturation magnetization value of the cemented carbide stored in the computer host 19 beforehand is compared with the measured value to calculate the calibration coefficient K.

[0099] Step 2: Place the cemented carbide test samples in batches in the sample storage hopper 3. The PLC controller 27 starts the equipment. The infrared sensor 4 located on the single sample storage slot 6 detects whether there is a sample above. If there is no sample, the PLC controller 27 starts the ejector pin 5 to push a cemented carbide sample into the single sample storage slot 6.

[0100] Step 3: Infrared sensor 4 detects the presence of a hard alloy sample in the single sample storage slot 6. PLC controller 27 starts the length measuring stepper motor 9, which drives the contact switch 7 on the length measuring lead screw 8 to approach one end of the sample. When the contact switch 7 is pushed down by the sample, the contact switch 7 is turned on. After PLC controller 27 detects the on signal, it stops the length measuring stepper motor 9 from rotating and records the number of travel pulses N of the stepper motor.

[0101] Step 4: Calculate the length of the cemented carbide sample based on the total length L of the single sample storage slot 6, the number of travel pulses N of the stepper motor, and the lead screw advance distance corresponding to each pulse, and transmit the result to the computer host 19 through the PLC controller 27.

[0102] Step 5: After the length measurement is completed, the PLC controller 27 controls the sample handling machine claw 10 to pick up the cemented carbide sample from the single sample storage slot 6 and place it into the balance sample placement slot 12. The electronic balance 11 weighs the sample and transmits the mass information to the computer host 19.

[0103] Step 6: After the mass measurement is completed, the PLC controller 27 controls the sample handling claw 10 to pick up the cemented carbide sample from the balance sample placement slot 12 and place it into the test sample placement slot 13. The PLC controller 27 controls the test stepper motor 15 to rotate, and transfers the test sample placement slot 13 and the cemented carbide sample in it into the permanent magnet 25 for magnetization. The magnetization time is t seconds, so that the sample reaches the saturation magnetization intensity.

[0104] Step 7: The PLC controller 27 controls the test stepper motor 15 to rotate in reverse, quickly removing the test sample tray 13 and the sample inside from the permanent magnet 25. During the removal process, due to the principle of electromagnetic induction, an induced current is generated in the magnetic flux sensor 26. The generated induced current is proportional to the content of magnetic cobalt (nickel, iron) in the tested cemented carbide. The data acquisition device 28 detects the induced current and sends the collected data to the computer host 19 for data processing. Combined with the mass and length information of the cemented carbide, the magnetic cobalt (nickel, iron) content and specific saturation magnetization value of the sample are calculated. After the sample is removed, the PLC controller 27 controls the sorting and transporting robot claw 21 to pick up the cemented carbide sample from the test sample tray 13 and place it into the standard sample tray 20.

[0105] Step 8: Based on the calculation results and the preset sorting information in the computer program, the computer host 19 determines the correct location for the cemented carbide sample in the sorting and placement slot 22, and sends this information to the PLC controller 27. The PLC controller 27 then sends a command, and the sorting and handling robot gripper 21 picks up the tested sample from the standard placement slot 20 and places it in the corresponding position in the sorting and placement slot 22. Figures 2-3 As shown.

[0106] The calibration coefficient K is calculated as follows:

[0107] (1) Data acquisition and recording: The data acquisition unit 28 converts the induced current generated by the magnetic flux sensor 26 into a voltage value through the acquisition resistor, accurately detects the magnitude of the induced voltage generated by the magnetic flux sensor 26, and sends the data to the computer host 19.

[0108] (2) Based on the proportional relationship between the induced voltage and the content of magnetic cobalt (nickel, iron) in the tested cemented carbide, the computer host 19, combined with the mass and length information of the cemented carbide standard sample stored in the computer host 19, calculates the currently measured content of magnetic cobalt (nickel, iron) using a preset algorithm. and specific saturation magnetization value ;

[0109] (3) The standard saturation magnetization value of the cemented carbide standard sample is pre-stored in the computer host 19. The retrieved value is compared with the currently measured specific saturation magnetization value. Compare;

[0110] (4) Calculate the calibration coefficient K: The formula for calculating the calibration coefficient K is as follows: This formula represents the ratio of the standard specific saturation magnetization value to the measured specific saturation magnetization value. This ratio can be used to calibrate subsequent measurement results, eliminating the influence of systematic errors and other factors. The computer host 19, based on the above formula, sets the standard specific saturation magnetization value... And the measured saturation magnetization value Substitute the values ​​and calculate the calibration coefficient K.

[0111] (5) Storage and application of calibration coefficient K: The calculated calibration coefficient K is stored in a specific storage area of ​​the computer host 19 so that the measurement results can be corrected when measuring other cemented carbide samples. In subsequent measurements, when the magnetic cobalt (nickel, iron) content and specific saturation magnetization of the cemented carbide sample are measured again, the measurement results are multiplied by the calibration coefficient K to obtain the accurate measured value after calibration.

[0112] Example 3

[0113] Calculate the magnetic cobalt (nickel, iron) content using a standard sample length of 300 mm and a sample mass of 100 g. and specific saturation magnetization value The default algorithm is as follows:

[0114] (1) Integral processing of induced electromotive force: such as Figure 4 As shown, the induced voltage signal is processed by the AD module of the data acquisition unit. ( The data was acquired, and due to interference, it was filtered using a third-order Butterworth low-pass digital filter. The filtered signal is as follows:

[0115]

[0116]

[0117] The sampling frequency here is 1000Hz and the cutoff frequency is 10Hz. The third-order Butterworth parameters are calculated using the bilinear transform method: b0 = 0.0000005917, b1 = 0.0000017752, b2 = 0.0000017752, b3 = 0.0000005917, a1 = -2.9768443337, a2 = 2.9533408846, a3 = -0.9764122340.

[0118] (2) Integrate the digitally filtered signal to obtain the integral value. :

[0119]

[0120] The filtered first The voltage value at each point, according to Figure 4 Data calculation .

[0121] (3) Magnetic cobalt (nickel, iron) content (mass) With integral value Proportional:

[0122]

[0123] This is a proportionality constant, obtained through calibration. During calibration, a 100g piece of pure cobalt (100% purity) is used to conduct a test, and the integral value is obtained. ,at this time Calculated.

[0124] (4) Calculation of the percentage of magnetic cobalt (nickel, iron) content: percentage of magnetic cobalt (nickel, iron) content for:

[0125]

[0126] in The total mass of the sample is 100g.

[0127] (5) Specific saturation magnetization ( ): refers to the magnetic moment per unit mass of a material in a saturated magnetized state, and its expression is:

[0128]

[0129] in It is the total saturation magnetic moment of the material. It refers to the quality of the sample.

[0130] (6) The cemented carbide sample is composed of magnetic cobalt (nickel, iron) and non-magnetic components, and the effect of their interaction on magnetism is ignored. Under saturation magnetization, the saturation magnetic moment of the sample is... Mainly composed of the saturation magnetic moment of magnetic cobalt (nickel, iron) The contribution of the magnetic moment of the non-magnetic component is negligible, that is... .

[0131] (7) For magnetic cobalt (nickel, iron), its saturation magnetic moment Mass of magnetic cobalt (nickel, iron) Proportional. This is because the saturation magnetic moment of a magnetic material is determined by the ordered arrangement of its internal magnetic moments, and the number of magnetic moments is directly proportional to the number of magnetic atoms. Given a fixed mass, the number of magnetic atoms is directly proportional to the mass. Therefore, it can be expressed as... ,in It is a proportionality constant that is related to factors such as the atomic magnetic moments and crystal structure of the magnetic components.

[0132] (8) Substitute into the expression for the saturation magnetization From this, we can obtain:

[0133]

[0134] in, It is a proportionality constant, which is related to the magnetic material in the test sample. This represents the percentage of magnetic cobalt (nickel, iron) content.

[0135] (9) This is a proportionality constant related to the magnetic material in the tested alloy. The specific saturation magnetization of pure cobalt is a fixed value: 160 G·cm³ / g. Therefore, when testing cobalt alloys... Note: If testing nickel alloys, the specific saturation magnetization of pure nickel is a fixed value. =54.5 G·cm³ / g. If testing iron alloys, the specific saturation magnetization of pure iron is a fixed value: =217 G·cm³ / g.

[0136] (10) Since the length of the sample has a certain influence on the magnitude of the induced electromotive force, the final result needs to be corrected for the influence of the length:

[0137]

[0138] This represents the length correction factor; the input length is... Linear mapping to correction coefficient :

[0139]

[0140] The sample length is calculated as follows:

[0141] In the cemented carbide sample length measurement system, the total length of a single sample storage slot is: It serves as a fixed reference point to define the sample placement space. During measurement, the length measuring stepper motor drives the trigger point of the contact switch to press the sample against the reference point at the other end. At this time, the PLC controller records the total number of pulses traveled by the stepper motor. And through pulse equivalent (That is, the distance the lead screw moves for each pulse) Calculate the actual forward distance of the pushing mechanism. Because there is a known mechanical correlation between the distance the contact switch travels and the end of the sample storage tank, the sample length... Through total length Subtract the forward travel distance of the contact switch The conclusion is:

[0142]

[0143] make g, , The magnetic cobalt (nickel, iron) content was calculated. =5%, and specific saturation magnetization Then multiply by the calibration factor K, let K=1.01, to get the final test result:

[0144] Measured values ​​of magnetic cobalt (nickel, iron) content:

[0145]

[0146] Measured value of specific saturation magnetization:

[0147] G·cm³ / g

[0148] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A detection system for the cobalt (nickel, iron) content and specific saturation magnetization of cemented carbide, characterized in that... include: The sample loading module includes a sample loading screw (1), a sample loading motor (2), a sample storage hopper (3), an infrared sensor (4), a push pin (5), a single sample storage slot (6), and a sample handling robot claw (10). The sample handling robot claw (10) is connected to the sample loading screw (1) for transmission, and the sample loading motor (2) is used to drive the sample loading screw (1). The infrared sensor (4) is located on the single sample storage slot (6) and is used to detect whether there is a sample above the single sample storage slot (6). The push pin (5) is located on the side of the single sample storage slot (6) and is used to push the sample to be tested into the single sample storage slot (6). The sample storage hopper (3) is located on one side of the single sample storage slot (6) and is used to store the sample to be tested. The length measurement module includes a contact switch (7), a length measuring lead screw (8), and a length measuring stepper motor (9); the contact switch (7) is connected to the length measuring lead screw (8) in a transmission manner; the length measuring lead screw (8) and the length measuring stepper motor (9) are located on the other side of the single sample storage slot (6), and the length measuring stepper motor (9) is used to drive the length measuring lead screw (8). The weighing module includes an electronic balance (11) and a balance layout slot (12); the balance layout slot (12) is located above the electronic balance (11); The test sample delivery module includes a test sample placement slot (13), a test guide rail (14), a test stepper motor (15), a connector (16), and a test transmission belt (17). The test sample placement slot (13) is located on the test guide rail (14) and can move up and down along the test guide rail (14). The test transmission belt (17) is located around the test guide rail (14), and the test stepper motor (15) is used to drive the test transmission belt (17). The connector (16) is located between the test transmission belt (17) and the test sample placement slot (13) and is used to connect the test transmission belt (17) and the test sample placement slot (13). The permanent magnet and sensor module includes a permanent magnet (25) and a magnetic flux sensor (26). The permanent magnet (25) and the magnetic flux sensor (26) are cylindrical bodies. The test rail (14) passes through the permanent magnet (25) and the magnetic flux sensor (26). The center line of the permanent magnet (25) and the magnetic flux sensor (26) coincides with the test rail (14). The magnetic flux sensor (26) is located between the permanent magnet (25) and the test rail (14). The standard sample placement module includes a standard sample placement slot (20) for storing standard samples; The sample sorting module includes a sorting and handling machine claw (21), a sorting and placing groove (22), a sorting motor (23), and a sorting screw (24). The sorting and handling machine claw (21) is connected to the sorting screw (24) in a transmission connection, and the sorting motor (23) is used to drive the sorting screw (24).

2. The detection system for cobalt (nickel, iron) content and specific saturation magnetization of cemented carbide according to claim 1, characterized in that, The detection system also includes a computer data processing and display module, which consists of a monitor (18) and a computer host (19).

3. The detection system for cobalt (nickel, iron) content and specific saturation magnetization of cemented carbide according to claim 1, characterized in that, The detection system also includes a control module, which consists of a PLC controller (27) and a USB data acquisition unit (28).

4. The detection system for cobalt (nickel, iron) content and specific saturation magnetization of cemented carbide according to claim 1, characterized in that, The test stepper motors (15) are symmetrically arranged at both ends of the test transmission belt (17), and the number of test stepper motors (15) is two.

5. The detection system for cobalt (nickel, iron) content and specific saturation magnetization of cemented carbide according to claim 1, characterized in that, The sorting screw (24) and the sample feeding screw (1) are arranged in parallel.

6. A method for detecting the cobalt (nickel, iron) content and specific saturation magnetization of cemented carbide, characterized in that, Includes the following steps: Step 1: The PLC controller (27) starts the system for automatic calibration. After receiving the instruction, the sorting and handling machine claw (21) grabs the hard alloy standard sample in the standard lofting slot (20) and places it into the test lofting slot (13). The PLC controller (27) controls the test stepper motor (15) to rotate, and transfers the test lofting slot (13) and the hard alloy sample in it into the permanent magnet (25) for magnetization. The magnetization time is t seconds, so that the sample reaches the saturation magnetization intensity. The PLC controller (27) controls the test stepper motor (15) to rotate in the opposite direction, and quickly removes the test lofting slot (13) and the hard alloy sample in it from the permanent magnet (25). During the removal process, an induced current will be generated in the magnetic flux sensor (26). The induced current is detected by the data acquisition device (28), and the collected data is sent to the computer host (19) for data processing to calculate the calibration coefficient K. Step 2: Place the cemented carbide test samples in batches in the sample storage hopper (3), start the equipment with the PLC controller (27), and the infrared sensor (4) located on the single sample storage slot (6) will detect whether there is a sample above. If there is no sample, the PLC controller (27) will start the ejector pin (5) to push a cemented carbide sample into the single sample storage slot (6). Step 3: The infrared sensor (4) detects the presence of a hard alloy sample in the single sample storage slot (6). The PLC controller (27) starts the length measuring stepper motor (9), which drives the contact switch (7) on the length measuring lead screw (8) to approach one end of the sample. When the contact switch (7) is pushed down by the sample, the contact switch (7) is turned on. After the PLC controller (27) detects the on signal, it stops the length measuring stepper motor (9) from rotating and records the number of travel pulses N of the stepper motor. Step 4: Calculate the length of the cemented carbide sample based on the total length L of the single sample storage slot (6), the number of travel pulses N of the stepper motor, and the lead screw travel distance corresponding to each pulse, and transmit the data to the computer host (19) through the PLC controller (27). Step 5: After the length measurement is completed, the PLC controller (27) controls the sample handling machine claw (10) to pick up the cemented carbide sample from the single sample storage slot (6) and place it into the balance sample placement slot (12). The electronic balance (11) weighs the sample and transmits the mass information to the computer host (19). Step 6: After the mass measurement is completed, the PLC controller (27) controls the sample handling machine claw (10) to pick up the cemented carbide sample from the balance sample placement slot (12) and place it into the test sample placement slot (13). The PLC controller (27) controls the test stepper motor (15) to rotate, and transfers the test sample placement slot (13) and the cemented carbide sample in it into the permanent magnet (25) for magnetization. The magnetization time is t seconds, so that the sample reaches the saturation magnetization intensity. Step 7: The PLC controller (27) controls the test stepper motor (15) to rotate in reverse, so that the test sample slot (13) and the sample in it are quickly removed from the permanent magnet (25). During the removal process, due to the principle of electromagnetic induction, an induced current will be generated in the magnetic flux sensor (26). The induced current is proportional to the content of magnetic cobalt (nickel, iron) in the tested cemented carbide. The induced current is detected by the data acquisition device (28), and the collected data is sent to the computer host (19) for data processing. Combined with the mass and length information of the cemented carbide, the magnetic cobalt (nickel, iron) content and the specific saturation magnetization value of the sample are calculated. Step 8: The computer host (19) determines the position where the cemented carbide sample should be stored in the sorting and placement slot (22) based on the calculation results and the sorting information preset in the computer program, and sends the information to the PLC controller (27). The PLC controller (27) sends an instruction to place the tested sample into the corresponding position in the sorting and placement slot (22) through the sorting and handling machine claw (21).

7. The method for detecting the cobalt (nickel, iron) content and specific saturation magnetization of cemented carbide according to claim 6, characterized in that, Step one specifically includes: 1) Data acquisition and recording: The data acquisition unit (28) converts the induced current generated by the magnetic flux sensor (26) into a voltage value through the acquisition resistor, accurately detects the magnitude of the induced voltage generated by the magnetic flux sensor (26), and sends the data to the computer host (19). 2) The computer host (19) calculates the magnetic cobalt (nickel, iron) content measured at the moment by using a preset algorithm, based on the proportional relationship between the induced voltage and the magnetic cobalt (nickel, iron) content in the tested cemented carbide, combined with the mass and length information of the cemented carbide standard sample stored in the computer host (19) beforehand. and specific saturation magnetization value ; 3) The standard saturation magnetization value of the cemented carbide standard sample is stored in the computer host (19) in advance. The retrieved value is compared with the currently measured specific saturation magnetization value. Compare; 4) Calculate the calibration coefficient K: The formula for calculating the calibration coefficient K is as follows: This ratio can be used to calibrate subsequent measurement results in order to eliminate the influence of factors such as systematic errors on the measurement results; 5) Storage and application of calibration coefficient K: The calculated calibration coefficient K is stored in a specific storage area of ​​the computer host (19) so that the measurement results can be corrected when measuring other cemented carbide samples. When measuring the magnetic cobalt (nickel, iron) content and specific saturation magnetization value of cemented carbide samples, the measurement results are multiplied by the calibration coefficient K to obtain the accurate measurement value after calibration.

8. The method for detecting the cobalt (nickel, iron) content and specific saturation magnetization of cemented carbide according to claim 6, characterized in that, In step four, the calculation method for the length of the cemented carbide sample is as follows: In the cemented carbide sample length measurement system, the total length of a single sample storage slot (6) is... It serves as a fixed reference for defining the sample placement space; During measurement, the length measuring stepper motor (9) drives the trigger point of the contact switch (7) to press the sample against the reference point at the other end. At this time, the PLC controller (27) records the total number of pulses of the stepper motor. And through pulse equivalent (That is, the distance the lead screw moves for each pulse) The actual forward distance of the pushing mechanism is calculated as follows: Because there is a known mechanical correlation between the distance the contact switch advances and the end of the single sample storage slot (6), the sample length Through total length Subtract the forward travel distance of the contact switch The conclusion is: 。 9. The method for detecting the cobalt (nickel, iron) content and specific saturation magnetization of cemented carbide according to claim 7, characterized in that, In step 5), specifically: 5.1) Integral processing of induced electromotive force: The induced voltage signal is integrated by the AD module of the data acquisition unit (28). ( The data was acquired, and due to interference, it was filtered using a third-order Butterworth low-pass digital filter. The filtered signal... for: in, , These are third-order Butterworth parameters; The filtered first Voltage values ​​at each point; 5.2) Integrate the digitally filtered signal to obtain the integral value. : 5.3) Magnetic cobalt (nickel, iron) content With integral value Proportional: in, This is a proportionality constant (which needs to be determined through calibration); 5.4) Calculation of the percentage of magnetic cobalt (nickel, iron) content: Percentage of magnetic cobalt (nickel, iron) content for: in, Total mass of the sample; 5.5) Specific saturation magnetization ( ): in, It is the total saturation magnetic moment of the sample. It refers to the quality of the sample; The cemented carbide sample consists of magnetic cobalt (nickel, iron) and non-magnetic components, and the influence of their interactions on magnetism is ignored. Under saturation magnetization, the sample's saturation magnetic moment is... Mainly composed of the saturation magnetic moment of magnetic cobalt (nickel, iron) The contribution of the magnetic moment of the non-magnetic component is negligible, that is... ; 5.6) For magnetic cobalt (nickel, iron), its saturation magnetic moment Mass of magnetic cobalt (nickel, iron) This is because the saturation magnetic moment of a magnetic material is determined by the ordered arrangement of its internal magnetic moments, and the number of magnetic moments is directly proportional to the number of magnetic atoms. Given a constant mass, the number of magnetic atoms is directly proportional to the mass, which can be expressed as: in, It is a proportionality constant that is related to factors such as the atomic magnetic moments and crystal structure of the magnetic components; 5.7) will Substitute into the expression for the saturation magnetization From this, we can obtain: in, It is a proportionality constant, which is related to the magnetic material in the test sample. The percentage of magnetic cobalt (nickel, iron) content; 5.8) Multiply the measurement result by the calibration factor K to obtain the accurate measured value after calibration: Since the length of the sample has a certain influence on the magnitude of the induced electromotive force, the final result needs to be corrected for the influence of the length: This represents the length correction function, which linearly maps the input length to the correction coefficient. Measured values ​​of magnetic cobalt (nickel, iron) content: Measured value of specific saturation magnetization: 。

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