A method and equipment for evaluating the cleanliness of an Al-Si cast aluminum alloy product

Abstract

The present invention provides a method and device for evaluating the cleanliness of an Al-Si cast aluminum alloy product, which relates to the technical field of evaluating the cleanliness of aluminum alloys. A number of aluminum ingots are randomly selected from the aluminum alloy product and made into test samples that meet the inner cavity size of the crucible; the cleanliness evaluation values of the aluminum alloy products of a number of test samples corresponding to a number of aluminum ingots are obtained through the aluminum alloy product cleanliness evaluation model; the cleanliness of a number of test samples corresponding to each aluminum ingot is detected through a cleanliness test; a comprehensive evaluation matrix of the aluminum alloy product cleanliness is constructed to obtain the comprehensive evaluation value of the aluminum alloy product cleanliness; based on the comprehensive evaluation value of the aluminum alloy product cleanliness, the corresponding aluminum alloy product cleanliness grade is obtained. The present invention uses a trained aluminum alloy product cleanliness evaluation model to obtain the cleanliness evaluation value, making the evaluation more objective and accurate. By constructing a comprehensive evaluation matrix of the aluminum alloy product cleanliness, considering the cleanliness of multiple aluminum ingots and test samples, the comprehensive evaluation result is more comprehensive.

Description

Technical Field

[0001] The present invention belongs to the technical field of evaluation of the cleanliness of aluminum alloys, and particularly relates to a method and equipment for evaluating the cleanliness of Al-Si cast aluminum alloy products. Background Art

[0002] Inclusions and gases in metals have a significant impact on the strength, fatigue resistance, corrosion resistance, stress corrosion cracking performance, etc. of materials. Effectively controlling the oxidation inclusions in the melt to improve the quality of aluminum alloy products is the common goal pursued by the aluminum melting and casting industry;

[0003] The traditional method for evaluating the cleanliness of cast aluminum alloy products is as follows: placing an aluminum alloy ingot sample in a crucible in a cleanliness test device and heating it to melt, allowing the aluminum melt to solidify into an aluminum block under pressure through a filter plate. The slag in the aluminum melt cannot pass through the filter plate and remains on the filter plate. The cleanliness of the sample is evaluated based on the mass difference between the sample and the aluminum block;

[0004] The existing method mainly relies on the direct comparison of the mass difference between the sample and the aluminum block, which may lead to a judgment with relatively high subjectivity. Since the cleanliness is evaluated only by the mass difference, it cannot comprehensively reflect the distribution and composition of the slag in the aluminum melt, and the accuracy of the cleanliness evaluation is insufficient. Summary of the Invention

[0005] The present invention provides a method and equipment for evaluating the cleanliness of Al-Si cast aluminum alloy products to solve at least one of the above-mentioned technical problems.

[0006] To solve the above technical problems, the present invention discloses a method and equipment for evaluating the cleanliness of Al-Si cast aluminum alloy products. The evaluation method includes the following steps:

[0007] S1. Randomly select a number of aluminum ingots from the aluminum alloy products, cut a number of sample blanks from each aluminum ingot, and make test samples that meet the inner cavity size of the crucible. Check whether there are foreign objects on the surface of the test samples. If there are foreign objects, they need to be washed with water and dried;

[0008] S2. Collect surface images of a number of test samples respectively, and input the collection results into a trained evaluation model for the cleanliness of aluminum alloy products to obtain the cleanliness evaluation values of the aluminum alloy products corresponding to a number of test samples of a number of aluminum ingots;

[0009] S3. Conduct a cleanliness test through the equipment main body, heating module, control module, weighing module, pressurizing module and calculation module to detect the cleanliness of a number of test samples corresponding to each aluminum ingot;

[0010] S4. Based on the cleanliness evaluation values of the aluminum alloy products corresponding to several aluminum ingots and the cleanliness of several test samples corresponding to each aluminum ingot, construct a comprehensive evaluation matrix for the cleanliness of the aluminum alloy products, and obtain the comprehensive evaluation value of the cleanliness of the aluminum alloy products based on the comprehensive evaluation matrix for the cleanliness of the aluminum alloy products;

[0011] S5. Based on the comprehensive evaluation value of the cleanliness of the aluminum alloy products, obtain the corresponding cleanliness grade of the aluminum alloy products.

[0012] Preferably, step S3 includes:

[0013] S31. Before the test, evenly apply an antioxidant on the outer surface of the crucible to prevent the crucible from oxidizing, and evenly spray a release agent on the inner wall of the crucible so that the molten aluminum does not adhere to the inner wall of the crucible;

[0014] S32. Assemble the filter table and install it at the crucible output end inside the equipment main body;

[0015] S33. Use the weighing module to weigh the mass of the test sample and the sample receiving tray, and import it into the calculation module;

[0016] S34. Put the test sample into the crucible and seal it. After heating and melting, pressurize and filter the molten aluminum. The filtered molten aluminum falls into the sample receiving tray, forms an aluminum block after cooling, weigh the aluminum block and the sample receiving tray, and input the weighing result into the calculation module to obtain the cleanliness of the test sample.

[0017] Preferably, step S34 of putting the test sample into the crucible and sealing it, and pressurizing and filtering the molten aluminum after heating and melting includes:

[0018] S341. Put the test sample into the crucible, cover the sealing cover of the equipment main body. The sealing cover includes a middle cover and an upper cover. Put the thermocouple for measuring temperature into the protective tube and insert it into the crucible together. Note that tighten the interface between the protective tube and the equipment main body before pressurization to avoid air leakage during pressurization;

[0019] S342. Turn on the equipment main body, and the heating module of the equipment main body heats at a heating rate of 15 °C / min. When the temperature rises to 720 °C, connect the compressed air pipe;

[0020] S343. When the temperature rises to 770 °C, the equipment main body will automatically start pressurization. Manually and slowly adjust the pressure to about 0.09 Mpa, and the pressurization time is 10 min. After 10 min, the pressurization will automatically end.

[0021] Preferably, the antioxidant component is silicon carbide, and the release agent component is boron nitride.

[0022] Preferably, the cleanliness of the i-th test sample:

[0023] (1); where, is the cleanliness of the i-th test sample, is the mass of the i-th test sample, is the mass of the aluminum block formed after melting and filtering the i-th test sample.

[0024] Preferably, based on the cleanliness evaluation values of the aluminum alloy products corresponding to several test samples of several aluminum ingots and the cleanliness of several test samples corresponding to each aluminum ingot, a comprehensive evaluation matrix of the cleanliness of the aluminum alloy products is constructed:

[0025] (2); where, is the comprehensive evaluation matrix of the cleanliness of the aluminum alloy products when taking n test samples from each of 5 aluminum ingots for the cleanliness test, is the cleanliness evaluation value of the aluminum alloy product of the first test sample of the first aluminum ingot, is the cleanliness evaluation value of the aluminum alloy product of the second test sample of the first aluminum ingot, is the cleanliness evaluation value of the aluminum alloy product of the n-th test sample of the first aluminum ingot, is the cleanliness evaluation value of the aluminum alloy product of the first test sample of the second aluminum ingot, is the cleanliness evaluation value of the aluminum alloy product of the second test sample of the second aluminum ingot, is the cleanliness evaluation value of the aluminum alloy product of the n-th test sample of the second aluminum ingot, is the cleanliness evaluation value of the aluminum alloy product of the first test sample of the third aluminum ingot, is the cleanliness evaluation value of the aluminum alloy product of the second test sample of the third aluminum ingot, is the cleanliness evaluation value of the aluminum alloy product of the n-th test sample of the third aluminum ingot, is the cleanliness evaluation value of the aluminum alloy product of the first test sample of the fourth aluminum ingot, is the cleanliness evaluation value of the aluminum alloy product of the second test sample of the fourth aluminum ingot, is the cleanliness evaluation value of the aluminum alloy product of the n-th test sample of the fourth aluminum ingot, is the cleanliness evaluation value of the aluminum alloy product of the first test sample of the fifth aluminum ingot, is the cleanliness evaluation value of the aluminum alloy product of the second test sample of the fifth aluminum ingot, is the cleanliness evaluation value of the aluminum alloy product of the n-th test sample of the fifth aluminum ingot, is the cleanliness of the first test sample of the first aluminum ingot, is the cleanliness of the second test sample of the first aluminum ingot, is the cleanliness of the n-th test sample of the first aluminum ingot, The cleanliness of the first test sample of the second aluminum ingot, The cleanliness of the second test sample of the second aluminum ingot, The cleanliness of the nth test sample of the second aluminum ingot, The cleanliness of the first test sample of the third aluminum ingot, The cleanliness of the second test sample of the third aluminum ingot, The cleanliness of the nth test sample of the third aluminum ingot, The cleanliness of the first test sample of the fourth aluminum ingot, The cleanliness of the second test sample of the fourth aluminum ingot, The cleanliness of the nth test sample of the fourth aluminum ingot, The cleanliness of the first test sample of the fifth aluminum ingot, The cleanliness of the second test sample of the fifth aluminum ingot, The cleanliness of the nth test sample of the fifth aluminum ingot.

[0026] Preferably, the comprehensive evaluation value of the cleanliness of the aluminum alloy product is obtained based on the comprehensive evaluation matrix of the cleanliness of the aluminum alloy product, including:

[0027] Delete the cleanliness evaluation values of the aluminum alloy products and their corresponding cleanliness elements of all test samples of each aluminum ingot in the comprehensive evaluation matrix of the cleanliness of the aluminum alloy products to obtain five intermediate matrices, calculate the ranks of the five intermediate matrices, and delete the maximum and minimum values of the ranks of the five intermediate matrices. Use the average value of the ranks of the remaining three matrices as the comprehensive evaluation value of the cleanliness of the aluminum alloy product.

[0028] An evaluation device for the cleanliness of an Al-Si cast aluminum alloy product, including a device main body, a heating module, a control module, a weighing module, a pressurizing module and a calculation module. The control module is electrically connected to the device main body, the heating module, the weighing module, the pressurizing module and the calculation module;

[0029] The heating module is used to heat and melt the test sample, the weighing module is used to weigh the weight of the test sample before and after melting, the pressurizing module is used to pressurize and filter the aluminum liquid after the test sample is melted into aluminum liquid, the calculation module is used to calculate the cleanliness of the test sample, and the control module is used to control heating and pressurization, display the heating time, temperature, weighing weight and output the final calculation result.

[0030] Preferably, the device main body includes a mobile chassis, on which there is a body, a toolbox is installed on the body, a crucible is provided inside the body, a middle cover is provided above the crucible, an upper cover is provided on the middle cover, a pressure gauge and a fixing steering wheel are provided on the upper cover. Outside the crucible, a heater is provided inside the body, a sample receiving tray is provided below the crucible inside the mobile chassis, and a crucible tong is provided on the body;

[0031] A filter table is provided at the crucible outlet. The filter table filters a circular cake-shaped porous specific material for slag in the melt, with a thickness of 3.5 mm and a diameter of 26 mm.

[0032] Preferably, the heating module has a heating rate of , the weighing module has an accuracy of 0.1 g, the pressure of the pressing module is 0.099 MPa, and the material of the crucible tongs (9) should be heat-resistant and resistant to corrosion by molten aluminum. The material of the crucible (6) is a high-temperature-resistant graphite crucible, and the external dimensions of the crucible (6) are , the material of the sample receiving tray (8) is heat-resistant stainless steel, and the dimensions are .

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The present invention uses a trained cleanliness evaluation model for aluminum alloy products to obtain a cleanliness evaluation value through surface image acquisition, making the evaluation more objective and accurate. By constructing a comprehensive cleanliness evaluation matrix for aluminum alloy products, considering the cleanliness of multiple aluminum ingots and test samples, the comprehensive evaluation result is more comprehensive and no longer relies on a single quality difference index. Before the test starts, the test samples are cleaned and inspected to ensure that there are no foreign objects on the sample surface, reducing the influence of external factors on the evaluation result. Through the coordinated action of the equipment main body, heating module, control module, weighing module, pressing module, and calculation module, a systematic cleanliness test process is formed, improving the reliability and repeatability of the experiment. Based on the cleanliness evaluation value of the aluminum alloy product and the cleanliness of the test sample, a comprehensive evaluation matrix is constructed, and on the basis of the comprehensive evaluation matrix, the comprehensive cleanliness evaluation value of the aluminum alloy product is obtained, and then the corresponding cleanliness level is obtained. Through the advantages of objective evaluation, multi-dimensional comprehensive, sample pretreatment, and systematic process, the accuracy and comprehensiveness of the cleanliness evaluation of aluminum alloy products can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0036] Figure 1 is a schematic structural diagram of a device for evaluating the cleanliness of an Al-Si cast aluminum alloy product according to the present invention Figure 1 .

[0037] Figure 2 is a schematic structural diagram of a device for evaluating the cleanliness of an Al-Si cast aluminum alloy product according to the present invention Figure 2 .

[0038] Figure 3 is a schematic diagram of the structure of the filter table of the present invention.

[0039] In the figure: 1. Fixed steering wheel; 2. Pressure gauge; 3. Upper cover; 4. Middle cover; 5. Heater; 6. Crucible; 7. Toolbox; 8. Sample receiving tray; 9. Crucible tongs; 10. Machine body; 11. Moving chassis; 12. Filter table. Specific embodiments

[0040] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present invention, and are not used to limit the present invention.

[0041] In addition, in the present invention, descriptions such as "first" and "second" are only for descriptive purposes, and do not particularly refer to the meaning of order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions and technical features between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0042] The present invention provides the following embodiments

[0043] Embodiment 1

[0044] The embodiment of the present invention provides a method and equipment for evaluating the cleanliness of an Al-Si cast aluminum alloy product, as Figures 1-3 shown. The evaluation method includes the following steps:

[0045] S1. Randomly select a number of aluminum ingots from the aluminum alloy products, cut a number of sample blanks from each aluminum ingot, and make test samples that meet the inner cavity size of the crucible 6. Check whether there are foreign objects on the surface of the test samples. If there are foreign objects, they need to be washed with water and dried.

[0046] S2. Collect surface images of a number of test samples respectively, and input the collection results into the trained evaluation model for the cleanliness of aluminum alloy products to obtain the cleanliness evaluation values of the aluminum alloy products corresponding to a number of test samples of a number of aluminum ingots.

[0047] S3. Conduct a cleanliness test through the equipment main body, heating module, control module, weighing module, pressurizing module and calculation module to detect the cleanliness of a number of test samples corresponding to each aluminum ingot.

[0048] S4. Based on the cleanliness evaluation values of aluminum alloy products corresponding to a number of aluminum ingots and the cleanliness of a number of test samples corresponding to each aluminum ingot, construct a comprehensive evaluation matrix for the cleanliness of aluminum alloy products, and obtain the comprehensive evaluation value of the cleanliness of aluminum alloy products based on the comprehensive evaluation matrix for the cleanliness of aluminum alloy products;

[0049] S5. Based on the comprehensive evaluation value of the cleanliness of aluminum alloy products, obtain the corresponding cleanliness grade of the aluminum alloy products.

[0050] Table 1 Comprehensive evaluation value of the cleanliness of aluminum alloy products and corresponding cleanliness grades

[0051]

[0052] An evaluation device for the cleanliness of Al-Si cast aluminum alloy products includes a device main body, a heating module, a control module, a weighing module, a pressurizing module, and a calculation module. The control module is electrically connected to the device main body, the heating module, the weighing module, the pressurizing module, and the calculation module;

[0053] The heating module is used to heat and melt the test samples. The weighing module is used to weigh the weights of the test samples before and after melting. The pressurizing module is used to pressurize and filter the aluminum liquid after the test samples are melted into aluminum liquid. The calculation module is used to calculate the cleanliness of the test samples. The control module is used to control heating and pressurization, display the heating time, temperature, weighing weight, and output the final calculation result.

[0054] The working principle and beneficial effects of the above technical solution are as follows: The present invention uses a trained evaluation model for the cleanliness of aluminum alloy products (the trained evaluation model for the cleanliness of aluminum alloy products is a model obtained by training a neural network model with a large number of aluminum ingot test sample images as the input quantity of the model and the cleanliness evaluation values of aluminum alloy products corresponding to the large number of aluminum ingot test sample images as the output quantity of the model). By collecting surface images to obtain the cleanliness evaluation value, the evaluation is more objective and accurate. By constructing a comprehensive evaluation matrix for the cleanliness of aluminum alloy products, considering the cleanliness of multiple aluminum ingots and test samples, the comprehensive evaluation result is more comprehensive and no longer depends on a single quality difference index. Before the test starts, the test samples are cleaned and inspected to ensure that there are no foreign objects on the surface of the samples, reducing the influence of external factors on the evaluation result. Through the coordinated action of the device main body, heating module, control module, weighing module, pressurizing module, and calculation module, a systematic cleanliness test process is formed, improving the reliability and repeatability of the experiment. Based on the cleanliness evaluation value of the aluminum alloy product and the cleanliness of the test sample, a comprehensive evaluation matrix is constructed, and based on the comprehensive evaluation matrix, the comprehensive evaluation value of the cleanliness of the aluminum alloy product is obtained, and then the corresponding cleanliness grade is obtained. Through the advantages in aspects such as objective evaluation, multi-dimensional comprehensiveness, sample pretreatment, and systematic process, the accuracy and comprehensiveness of the evaluation of the cleanliness of aluminum alloy products can be improved.

[0055] Example 2

[0056] Based on Example 1, step S3 includes:

[0057] S31. Before the test, evenly apply an antioxidant on the outer surface of the crucible 6 to prevent the crucible 6 from oxidizing, and evenly spray a release agent on the inner wall of the crucible 6 so that the molten aluminum liquid does not adhere to the inner wall of the crucible 6;

[0058] S32. Assemble the filtration table 12 and install it at the output end of the crucible 6 inside the equipment main body;

[0059] S33. Use the weighing module to weigh the mass of the test sample and the sample receiving tray 8 and import it into the calculation module;

[0060] S34. Put the test sample into the crucible 6 and seal it. After heating and melting, pressurize and filter the aluminum liquid. The filtered aluminum liquid falls into the sample receiving tray 8, forms an aluminum block after cooling, weigh the aluminum block and the sample receiving tray 8, and input the weighing result into the calculation module to obtain the cleanliness of the test sample.

[0061] Preferably, the antioxidant component is silicon carbide, and the release agent component is boron nitride.

[0062] Preferably, the cleanliness of the i-th test sample:

[0063] (1); where is the cleanliness of the i-th test sample, is the mass of the i-th test sample, is the mass of the aluminum block formed after melting and filtering the i-th test sample.

[0064] The working principle and beneficial effects of the above technical solution are as follows: The application of the antioxidant and the spraying of the release agent can effectively prevent the oxidation of the crucible and the adhesion of the aluminum liquid, ensuring the purity of the aluminum liquid. The assembly and installation of the filtration table contribute to filtering and separating impurities in the aluminum liquid. By accurately weighing the mass of the test sample and the sample receiving tray, accurate data can be provided as the basis for subsequent cleanliness calculation. Through heating and pressurized filtration, impurities in the aluminum liquid are separated and collected in the sample receiving tray to form an aluminum block. By weighing the aluminum block and the sample receiving tray, the cleanliness of the test sample can be calculated.

[0065] Example 3

[0066] Based on Example 2, step S34 of putting the test sample into the crucible 6 and sealing it, and pressurizing and filtering the aluminum liquid after heating and melting includes:

[0067] S341, put the test sample into the crucible 6, cover the sealing cover of the equipment body, the sealing cover includes the middle cover 4 and the upper cover 3, put the thermocouple for measuring the temperature into the protection tube and insert it into the crucible 6 together, pay attention to tighten the interface between the protection tube and the equipment body before pressurization to avoid air leakage during pressurization;

[0068] S342, turning on the main body of the equipment, heating the heating module of the main body of the equipment at a heating rate of 15°C / min, and when the temperature rises to 720°C, connecting the compressed air pipe;

[0069] S343. When the temperature rises to 770℃, the main body of the equipment will automatically start pressurizing. The pressure is slowly adjusted manually to about 0.09Mpa. The pressurization time is 10 minutes, and the pressurization ends automatically after 10 minutes.

[0070] The working principle and beneficial effects of the above technical solution are as follows: the structural design of the middle cover and the upper cover is adopted to ensure the sealing, which effectively prevents the possible leakage problem before pressurization, ensures the sealing of the system, and thus improves the accuracy and safety of the pressurized filtration process; controlling the heating rate can effectively avoid the gas precipitation and unevenness caused by the aluminum liquid being heated too quickly; in addition, the access to compressed air at an appropriate temperature helps to maintain the fluidity of the aluminum liquid and prepare for subsequent pressurized filtration; through the automated pressurization process, it ensures that the aluminum liquid is pressurized and filtered at the optimal temperature, which helps to efficiently separate impurities and slag in the aluminum liquid, further improving the cleanliness of the aluminum alloy; maintaining a stable pressurization time can effectively control the filtration effect, making the cleanliness evaluation more accurate and reliable; through precise sealing, controlled heating and pressurization process, not only the accuracy and consistency of the cleanliness evaluation of aluminum alloy products are improved, but also the safety of the operation process is enhanced, providing a solid foundation for subsequent evaluation results.

[0071] Example 4

[0072] On the basis of Example 1, based on the aluminum alloy product cleanliness evaluation values ​​of several test samples corresponding to several aluminum ingots and the cleanliness of several test samples corresponding to each aluminum ingot, a comprehensive evaluation matrix for the cleanliness of aluminum alloy products is constructed:

[0073] (2) Among them, The comprehensive evaluation matrix of cleanliness of aluminum alloy products is obtained when n test samples are taken from each aluminum ingot for cleanliness test. is the cleanliness evaluation value of the aluminum alloy product of the first test sample of the first aluminum ingot, is the cleanliness evaluation value of the aluminum alloy product of the second test sample of the first aluminum ingot, is the aluminum alloy product cleanliness evaluation value of the nth test sample of the first aluminum ingot, is the cleanliness evaluation value of the aluminum alloy product for the 1st test sample of the 2nd aluminum ingot, is the cleanliness evaluation value of the aluminum alloy product for the 2nd test sample of the 2nd aluminum ingot, is the cleanliness evaluation value of the aluminum alloy product for the nth test sample of the 2nd aluminum ingot, is the cleanliness evaluation value of the aluminum alloy product for the 1st test sample of the 3rd aluminum ingot, is the cleanliness evaluation value of the aluminum alloy product for the 2nd test sample of the 3rd aluminum ingot, is the cleanliness evaluation value of the aluminum alloy product for the nth test sample of the 3rd aluminum ingot, is the cleanliness evaluation value of the aluminum alloy product for the 1st test sample of the 4th aluminum ingot, is the cleanliness evaluation value of the aluminum alloy product for the 2nd test sample of the 4th aluminum ingot, is the cleanliness evaluation value of the aluminum alloy product for the nth test sample of the 4th aluminum ingot,

[0074] is the cleanliness evaluation value of the aluminum alloy product for the 1st test sample of the 5th aluminum ingot, is the cleanliness evaluation value of the aluminum alloy product for the 2nd test sample of the 5th aluminum ingot, is the cleanliness evaluation value of the aluminum alloy product for the nth test sample of the 5th aluminum ingot, is the cleanliness of the 1st test sample of the 1st aluminum ingot, is the cleanliness of the 2nd test sample of the 1st aluminum ingot, is the cleanliness of the nth test sample of the 1st aluminum ingot, is the cleanliness of the 1st test sample of the 2nd aluminum ingot, is the cleanliness of the 2nd test sample of the 2nd aluminum ingot, is the cleanliness of the nth test sample of the 2nd aluminum ingot, is the cleanliness of the 1st test sample of the 3rd aluminum ingot, is the cleanliness of the 2nd test sample of the 3rd aluminum ingot, is the cleanliness of the nth test sample of the 3rd aluminum ingot, is the cleanliness of the 1st test sample of the 4th aluminum ingot, is the cleanliness of the 2nd test sample of the 4th aluminum ingot, is the cleanliness of the nth test sample of the 4th aluminum ingot, is the cleanliness of the 1st test sample of the 5th aluminum ingot, is the cleanliness of the 2nd test sample of the 5th aluminum ingot, is the cleanliness of the nth test sample of the 5th aluminum ingot.

[0075] Preferably, the comprehensive evaluation value of the cleanliness of the aluminum alloy product is obtained based on the comprehensive evaluation matrix of the cleanliness of the aluminum alloy product, including:

[0076] Delete the cleanliness evaluation values of the aluminum alloy products and their corresponding cleanliness elements of all test samples of each aluminum ingot in the comprehensive evaluation matrix of the cleanliness of the aluminum alloy product to obtain 5 intermediate matrices. Calculate the ranks of the 5 intermediate matrices, and delete the maximum and minimum values of the ranks of the 5 intermediate matrices. Use the average value of the ranks of the remaining three matrices as the comprehensive evaluation value of the cleanliness of the aluminum alloy product.

[0077] The working principle and beneficial effects of the above technical solution: In the present invention, 5 aluminum ingots are taken for the cleanliness test, and n test samples are taken from each aluminum ingot for the cleanliness test. By constructing a comprehensive evaluation matrix, the cleanliness evaluation results of multiple test samples corresponding to each aluminum ingot can be comprehensively considered in one matrix, so as to more comprehensively and objectively understand the cleanliness status of the aluminum alloy product;

[0078] By deleting the cleanliness evaluation values of the aluminum alloy products and their corresponding cleanliness elements of all test samples of each aluminum ingot, it can ensure that the evaluation results are not affected by individual test samples, but comprehensively consider the evaluation results of multiple test samples. Deleting the maximum and minimum values of the ranks helps to exclude extreme values in the evaluation results and reduce the influence of abnormal data on the comprehensive evaluation results. By calculating the average value of the ranks of the remaining three intermediate matrices, a relatively stable quantitative index of the comprehensive evaluation value can be obtained, which can more accurately reflect the cleanliness of the aluminum alloy product.

[0079] Example 5

[0080] On the basis of Example 1, the equipment main body includes a mobile chassis 11. A machine body 10 is arranged on the mobile chassis 11. A toolbox 7 is installed on the machine body 10. A crucible 6 is arranged inside the machine body 10. A middle cover 4 is arranged above the crucible 6. An upper cover 3 is arranged on the middle cover 4. A pressure gauge 2 and a fixing steering wheel 1 are arranged on the upper cover 3. Outside the crucible 6 and inside the machine body 10, a heater 5 is arranged. Below the crucible 6 and inside the mobile chassis 11, a sample receiving tray 8 is arranged. A crucible tong 9 is arranged on the machine body 10;

[0081] A filter table 12 is arranged at the outlet of the crucible 6. The filter table 12 filters the round cake-shaped porous specific material of the slag in the melt, with a thickness of 3.5 mm and a diameter of 26 mm.

[0082] Preferably, the heating rate of the heating module is , the accuracy of the weighing module is 0.1 g, the pressure of the pressurizing module is 0.099 MPa, and the material of the crucible tong (9) should be heat-resistant and resistant to corrosion by molten aluminum. The material of the crucible (6) is a high-temperature-resistant graphite crucible. The outer dimensions of the crucible (6) are , the material of the sample receiving tray (8) is heat-resistant stainless steel, and the size is 。

[0083] The working principle and beneficial effects of the above technical solution are as follows: The equipment main body is equipped with a mobile chassis 11, enabling the equipment to have the characteristic of convenient movement, facilitating its use in laboratories or production sites, and meeting the requirements of different places. A toolbox 7 is installed on the equipment main body, which is convenient for storing and carrying the tools required for experiments, improving the work efficiency at the experimental site. The structure of the crucible 6, the middle cover 4 and the upper cover 3 is adopted to ensure the sealing of the test sample. A pressure gauge 2 and a fixed steering wheel 1 are arranged on the upper cover 3, which is convenient for observation and operation. The weighing module has high precision and can accurately measure the weight change of the sample before and after melting, providing accurate data for subsequent cleanliness calculation. The crucible 6 and the crucible tongs 9 are made of high-temperature resistant materials, which can withstand high-temperature environments and the corrosion of molten aluminum, ensuring the service life and stability of the equipment. The material of the sample receiving tray 8 is heat-resistant stainless steel, which can withstand the reception of high-temperature molten aluminum. The filtering table 12 is located at the outlet of the crucible 6, facilitating the pressurized filtering process.

[0084] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. A method for evaluating the cleanliness of Al-Si cast aluminum alloy products, characterized in that: The following steps are involved: S1. Randomly select a number of aluminum ingots from aluminum alloy products, cut a number of blanks from each aluminum ingot, and make test samples that meet the inner cavity size of the crucible (6). Check whether there are foreign objects on the surface of the test samples. If there are foreign objects, wash them with water and dry them; S2. Collect surface images of several test samples respectively, and input the collected results into the trained aluminum alloy product cleanliness evaluation model to obtain aluminum alloy product cleanliness evaluation values ​​of several test samples corresponding to several aluminum ingots; S3, performing a cleanliness test through the equipment body, heating module, control module, weighing module, pressurizing module and calculation module to detect the cleanliness of several test samples corresponding to each aluminum ingot; S4. Based on the aluminum alloy product cleanliness evaluation values ​​of the several test samples corresponding to the several aluminum ingots and the cleanliness of the several test samples corresponding to each aluminum ingot, a comprehensive evaluation matrix for the cleanliness of the aluminum alloy product is constructed, and a comprehensive evaluation value for the cleanliness of the aluminum alloy product is obtained based on the comprehensive evaluation matrix for the cleanliness of the aluminum alloy product; S5. Based on the comprehensive evaluation value of the cleanliness of the aluminum alloy product, obtain the cleanliness grade of the corresponding aluminum alloy product; Step S3 includes: S31. Before the test, an antioxidant is evenly applied to the outer surface of the crucible (6) to prevent the crucible (6) from oxidation, and a release agent is evenly sprayed on the inner wall of the crucible (6) to prevent the molten aluminum from adhering to the inner wall of the crucible (6); S32, assembling the filter station (12) and installing it at the output end of the crucible (6) in the main body of the device; S33, using a weighing module to weigh the mass of the test sample and the sample receiving plate (8), and importing the mass into a calculation module; S34, placing the test sample in a crucible (6) and sealing it, heating and melting the aluminum liquid and filtering it under pressure, allowing the filtered aluminum liquid to fall into a sample receiving tray (8), and forming an aluminum block after cooling, weighing the aluminum block and the sample receiving tray (8), and inputting the weighing result into a calculation module to obtain the cleanliness of the test sample.

2. The cleanliness evaluation method of an Al-Si cast aluminum alloy product according to claim 1, characterized in that: Step S34: placing the test sample into the crucible (6) and sealing it, heating and melting the aluminum liquid and filtering it under pressure, including: S341, place the test sample into the crucible (6), cover the sealing cover of the equipment body, the sealing cover includes a middle cover (4) and an upper cover (3), place the thermocouple for measuring the temperature into the protective tube and insert it into the crucible (6), and pay attention to tightening the interface between the protective tube and the equipment body before pressurization to avoid air leakage during pressurization; S342, the device body is turned on, and the heating module of the device body is heated at a heating rate Heat up, and when the temperature reaches 720℃, connect the compressed air pipe; S343, when the temperature rises to 770℃, the main body of the equipment will automatically start pressurizing, and the pressure can be adjusted manually and slowly. The pressurization time is about 10 minutes, and the pressurization will end automatically after 10 minutes.

3. The cleanliness evaluation method of an Al-Si cast aluminum alloy product according to claim 1, characterized in that: The antioxidant component is silicon carbide, and the release agent component is boron nitride.

4. The cleanliness evaluation device for Al-Si cast aluminum alloy products according to claim 1, characterized in that: Cleanliness of the i-th test sample: (1); among which, is the cleanliness of the i-th test sample, is the mass of the i-th test sample, is the mass of the aluminum block formed after melting and filtration of the ith test sample.

5. The cleanliness evaluation device for Al-Si cast aluminum alloy products according to claim 1, characterized in that: Based on the cleanliness evaluation values ​​of aluminum alloy products of several test samples corresponding to several aluminum ingots and the cleanliness of several test samples corresponding to each aluminum ingot, a comprehensive evaluation matrix of cleanliness of aluminum alloy products is constructed: (2); among which, The comprehensive evaluation matrix of cleanliness of aluminum alloy products is obtained when n test samples are taken from each aluminum ingot for cleanliness test. is the cleanliness evaluation value of the aluminum alloy product of the first test sample of the first aluminum ingot, is the cleanliness evaluation value of the aluminum alloy product of the second test sample of the first aluminum ingot, is the aluminum alloy product cleanliness evaluation value of the nth test sample of the first aluminum ingot, is the aluminum alloy product cleanliness evaluation value of the first test sample of the second aluminum ingot, is the aluminum alloy product cleanliness evaluation value of the second test sample of the second aluminum ingot, is the aluminum alloy product cleanliness evaluation value of the nth test sample of the second aluminum ingot, is the cleanliness evaluation value of the aluminum alloy product of the first test sample of the third aluminum ingot, is the cleanliness evaluation value of the aluminum alloy product of the second test sample of the third aluminum ingot, is the aluminum alloy product cleanliness evaluation value of the nth test sample of the third aluminum ingot, The cleanliness evaluation value of the aluminum alloy product of the first test sample of the fourth aluminum ingot is The cleanliness evaluation value of the aluminum alloy product of the second test sample of the fourth aluminum ingot is is the aluminum alloy product cleanliness evaluation value of the nth test sample of the 4th aluminum ingot, is the cleanliness evaluation value of the aluminum alloy product of the first test sample of the fifth aluminum ingot, The cleanliness evaluation value of the aluminum alloy product of the second test sample of the fifth aluminum ingot is is the aluminum alloy product cleanliness evaluation value of the nth test sample of the 5th aluminum ingot, The cleanliness of the first test sample of the first aluminum ingot, The cleanliness of the second test sample of the first aluminum ingot, is the cleanliness of the nth test sample of the first aluminum ingot, The cleanliness of the first test sample of the second aluminum ingot, The cleanliness of the second test sample of the second aluminum ingot is is the cleanliness of the nth test sample of the second aluminum ingot, The cleanliness of the first test sample of the third aluminum ingot is The cleanliness of the second test sample of the third aluminum ingot is is the cleanliness of the nth test sample of the 3rd aluminum ingot, The cleanliness of the first test sample of the fourth aluminum ingot is The cleanliness of the second test sample of the fourth aluminum ingot is is the cleanliness of the nth test sample of the 4th aluminum ingot, The cleanliness of the first test sample of the fifth aluminum ingot is The cleanliness of the second test sample of the fifth aluminum ingot is is the cleanliness of the nth test sample of the 5th aluminum ingot.

6. The cleanliness evaluation device for Al-Si cast aluminum alloy products according to claim 5, characterized in that: Based on the comprehensive evaluation matrix of aluminum alloy product cleanliness, the comprehensive evaluation value of aluminum alloy product cleanliness is obtained, including: In the comprehensive evaluation matrix of cleanliness of aluminum alloy products, the cleanliness evaluation values ​​of aluminum alloy products of all test samples of each aluminum ingot and their corresponding cleanliness elements are deleted to obtain 5 intermediate matrices. The ranks of the 5 intermediate matrices are calculated, and the maximum and minimum values ​​of the ranks of the 5 intermediate matrices are deleted. The average value of the ranks of the remaining three matrices is used as the comprehensive evaluation value of cleanliness of aluminum alloy products.

7. An Al-Si cast aluminum alloy product cleanliness evaluation device, used for evaluating the cleanliness of an Al-Si cast aluminum alloy product according to an Al-Si cast aluminum alloy product cleanliness evaluation method as claimed in any one of claims 1 to 6, characterized in that: It includes a device body, a heating module, a control module, a weighing module, a pressurizing module and a computing module, wherein the control module is electrically connected to the device body, the heating module, the weighing module, the pressurizing module and the computing module; The heating module is used to heat and melt the test sample, the weighing module is used to weigh the weight of the test sample before and after melting, the pressurizing module is used to pressurize and filter the aluminum liquid after the test sample is melted into aluminum liquid, the calculation module is used to calculate the cleanliness of the test sample, and the control module is used to control heating and pressurization, display the heating time, temperature, weighing weight, and output the final calculation result.

8. The cleanliness evaluation device for Al-Si cast aluminum alloy products according to claim 7, characterized in that: The main body of the device comprises a mobile chassis (11), a machine body (10) is provided on the mobile chassis (11), a tool box (7) is installed on the machine body (10), a crucible (6) is provided in the machine body (10), a middle cover (4) is provided above the crucible (6), an upper cover (3) is provided on the middle cover (4), a pressure gauge (2) and a fixing steering wheel (1) are provided on the upper cover (3), a heater (5) is provided in the machine body (10) outside the crucible (6), a sample receiving tray (8) is provided below the crucible (6) in the mobile chassis (11), and a crucible clamp (9) is provided on the machine body (10); A filter station (12) is provided at the outlet of the crucible (6), and the filter station (12) filters the circular cake-shaped porous specific material of slag in the melt, with a thickness of 3.5 mm and a diameter of 26 mm.

9. The cleanliness evaluation device for Al-Si cast aluminum alloy products according to claim 8, characterized in that: The heating rate of the heating module is The precision of the weighing module is 0.1g, and the pressure of the pressurizing module is The material of the crucible tongs (9) should be heat-resistant to 1200°C and resistant to aluminum liquid corrosion. The material of the crucible (6) is a high-temperature resistant graphite crucible. The overall dimensions of the crucible (6) are The sample tray (8) is made of heat-resistant stainless steel and has a size of .

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