Method and equipment for evaluating cleanliness of Al-Si cast aluminum alloy product

Abstract

The invention provides an Al-Si cast aluminum alloy product cleanliness evaluation method and equipment, and relates to the technical field of aluminum alloy cleanliness evaluation, a plurality of aluminum ingots are randomly selected from an aluminum alloy product, and a test sample meeting the size of an inner cavity of a crucible is prepared; aluminum alloy product cleanliness evaluation values of a plurality of test samples corresponding to the aluminum ingots are obtained through an aluminum alloy product cleanliness evaluation model; detecting the cleanliness of the plurality of test samples corresponding to each aluminum ingot through a cleanliness test; an aluminum alloy product cleanliness comprehensive evaluation matrix is constructed, and an aluminum alloy product cleanliness comprehensive evaluation value is obtained; and obtaining a corresponding aluminum alloy product cleanliness grade based on the aluminum alloy product cleanliness comprehensive evaluation value. According to the method, the cleanliness evaluation value is obtained by using the trained aluminum alloy product cleanliness evaluation model, so that the evaluation is more objective and accurate, and the comprehensive evaluation result is more comprehensive by constructing the aluminum alloy product cleanliness comprehensive evaluation matrix and considering the cleanliness of a plurality of aluminum ingots and test samples.

Description

Technical Field

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

[0002] Inclusions and gases in metals have a significant impact on the strength, fatigue resistance, corrosion resistance, and stress corrosion cracking performance of materials. Effectively controlling the oxide inclusions in the melt to improve the quality of aluminum alloy products is a common goal pursued by aluminum casting. The traditional cleanliness evaluation method for cast aluminum alloy products is: put the aluminum alloy ingot sample into the crucible in the cleanliness test device and heat it to melt, so that the aluminum melt solidifies into an aluminum block through the filter under the action of pressure. The slag in the aluminum melt cannot pass through the filter and remains on the filter. The cleanliness of the sample is evaluated based on the quality difference between the sample and the aluminum block. The existing method mainly relies on the direct comparison of the quality difference between the sample and the aluminum block, which may lead to highly subjective judgments. Since the cleanliness is evaluated only by the quality difference, it cannot fully 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

[0003] The present invention provides a method and device for evaluating the cleanliness of an Al-Si cast aluminum alloy product, which are used to solve at least one of the technical problems mentioned above.

[0004] In order to solve the above technical problems, the present invention discloses a method and device for evaluating the cleanliness of Al-Si cast aluminum alloy products. The evaluation method comprises the following steps: S1. Randomly select several aluminum ingots from aluminum alloy products, cut several samples 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, 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.

[0005] Preferably, step S3 includes: S31. Before the test, evenly apply an antioxidant on the outer surface of the crucible to prevent the crucible from oxidation, and evenly spray a release agent on the inner wall of the crucible to prevent the molten aluminum from adhering to the inner wall of the crucible; S32, assembling the filter station and installing it at the crucible output end in the main body of the equipment; S33, using a weighing module to weigh the mass of the test sample and the sample receiving plate, and importing the mass into a calculation module; S34. Put the test sample into a crucible and seal it. After heating and melting, filter the aluminum liquid under pressure. The filtered aluminum liquid falls into a sample receiving tray and 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.

[0006] Preferably, step S34 of placing the test sample into a crucible and sealing it, heating and melting it, and then pressurizing and filtering the aluminum liquid includes: S341. Place the test sample in the crucible, cover the sealing cover of the equipment body, which includes a middle cover and an upper cover, place the thermocouple for measuring the temperature in the protection tube and insert them into the crucible together. Note that the interface between the protection tube and the equipment body should be tightened before pressurization to avoid air leakage during pressurization. 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; 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.

[0007] Preferably, the antioxidant component is silicon carbide, and the release agent component is boron nitride.

[0008] Preferably, the cleanliness of the i-th test sample is: (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.

[0009] Preferably, 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 of aluminum alloy product cleanliness 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.

[0010] Preferably, obtaining a comprehensive evaluation value of cleanliness of an aluminum alloy product based on a comprehensive evaluation matrix of cleanliness of an aluminum alloy product comprises: 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.

[0011] An Al-Si cast aluminum alloy product cleanliness evaluation device comprises an equipment 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 equipment 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 molten aluminum after the test sample is melted into molten aluminum, 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.

[0012] Preferably, the main body of the device comprises a mobile chassis, a machine body is arranged on the mobile chassis, a tool box is installed on the machine body, a crucible is arranged in the machine body, a middle cover is arranged above the crucible, an upper cover is arranged on the middle cover, a pressure gauge and a fixing steering wheel are arranged on the upper cover, a heater is arranged in the machine body outside the crucible, a sample receiving tray is arranged below the crucible in the mobile chassis, and a crucible clamp is arranged on the machine body; A filter station is provided at the crucible outlet, which filters the slag in the melt into a round cake-shaped porous specific material with a thickness of 3.5 mm and a diameter of 26 mm.

[0013] Preferably, the heating rate of the heating module is The precision of the weighing module is 0.1g, the pressure of the pressurizing module is 0.099MPa, and the material of the crucible clamp (9) should be heat-resistant. The crucible (6) is made of a high temperature resistant graphite crucible and has an overall size of The sample tray (8) is made of heat-resistant stainless steel and has a size of .

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention uses a trained aluminum alloy product cleanliness evaluation model and obtains a cleanliness evaluation value by collecting surface images, so that the evaluation is more objective and accurate. By constructing a comprehensive evaluation matrix for the cleanliness of aluminum alloy products, the cleanliness of multiple aluminum ingots and test samples is taken into consideration, and the comprehensive evaluation result is more comprehensive and no longer relies on a single quality difference indicator. Before the test begins, the test sample is cleaned and inspected to ensure that there is no foreign matter on the sample surface, thereby reducing the influence of external factors on the evaluation result. Through the synergistic effect of the equipment main body, the heating module, the control module, the weighing module, the pressurization module and the calculation module, a systematic cleanliness test process is formed to improve the reliability and repeatability of the experiment. A comprehensive evaluation matrix is ​​constructed based on the cleanliness evaluation value of the aluminum alloy product and the cleanliness of the test sample. On the basis of the comprehensive evaluation matrix, a comprehensive evaluation value of the cleanliness of the aluminum alloy product is obtained, and then the corresponding cleanliness grade is obtained. Through the advantages of objective evaluation, multi-dimensional synthesis, sample pretreatment and systematic process, the accuracy and comprehensiveness of the cleanliness evaluation of the aluminum alloy product can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 This is a schematic diagram of the cleanliness evaluation equipment for Al-Si cast aluminum alloy products of the present invention. Figure 1 .

[0016] Figure 2 This is a schematic diagram of the cleanliness evaluation equipment for Al-Si cast aluminum alloy products of the present invention. Figure 2 .

[0017] Figure 3 It is a schematic diagram of the structure of the filter station of the present invention.

[0018] In the figure: 1. fixed steering wheel; 2. pressure gauge; 3. upper cover; 4. middle cover; 5. heater; 6. crucible; 7. tool box; 8. sample tray; 9. crucible tongs; 10. machine body; 11. mobile chassis; 12. filter station. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0020] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the 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 number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory 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.

[0021] The present invention provides the following embodiments Example 1 The embodiment of the present invention provides a method and device for evaluating the cleanliness of an Al-Si cast aluminum alloy product. Figure 1-3 As shown, the evaluation method includes the following steps: S1. Randomly select several aluminum ingots from aluminum alloy products, cut several 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, 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.

[0022] Table 1 Comprehensive evaluation value of cleanliness of aluminum alloy products and corresponding cleanliness level

[0023] An Al-Si cast aluminum alloy product cleanliness evaluation device comprises an equipment 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 equipment 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 molten aluminum after the test sample is melted into molten aluminum, 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.

[0024] The working principle and beneficial effects of the above technical solution are as follows: the present invention uses a trained aluminum alloy product cleanliness evaluation model (the trained aluminum alloy product cleanliness evaluation model is a model obtained after pre-training a neural network model by using a large number of aluminum ingot test sample images as the model input of the training samples, and using the aluminum alloy product cleanliness evaluation values ​​corresponding to the large number of aluminum ingot test sample images as the model output), obtains the cleanliness evaluation value by surface image acquisition, so that the evaluation is more objective and accurate, and constructs an aluminum alloy product cleanliness comprehensive evaluation matrix, taking into account the cleanliness of multiple aluminum ingots and test samples, so that the comprehensive evaluation result is more comprehensive and no longer relies on a single quality difference indicator. Before testing, the test samples are cleaned and inspected to ensure that there is no foreign matter on the sample surface and to reduce the influence of external factors on the evaluation results. Through the synergistic effect of the equipment body, heating module, control module, weighing module, pressurization module and calculation module, a systematic cleanliness test process is formed to improve the reliability and repeatability of the experiment. A comprehensive evaluation matrix is ​​constructed based on the cleanliness evaluation value of the aluminum alloy product and the cleanliness of the test sample. On the basis of 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 of objective evaluation, multi-dimensional synthesis, sample pretreatment and systematic process, the accuracy and comprehensiveness of the cleanliness evaluation of aluminum alloy products can be improved.

[0025] Example 2 Based on Example 1, step S3 includes: S31. Before the test, an antioxidant is evenly applied on 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 equipment; S33, using a weighing module to weigh the mass of the test sample and the sample receiving plate 8, and importing them into a calculation module; S34, placing the test sample into the crucible 6 and sealing it, heating and melting the aluminum liquid and filtering it under pressure, allowing the filtered aluminum liquid to fall into the 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 the calculation module to obtain the cleanliness of the test sample.

[0026] Preferably, the antioxidant component is silicon carbide, and the release agent component is boron nitride.

[0027] Preferably, the cleanliness of the i-th test sample is: (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.

[0028] The working principle and beneficial effects of the above technical solution are as follows: the application of antioxidant and the spraying of release agent can effectively prevent the oxidation of the crucible and the adhesion of aluminum liquid, ensuring the purity of the aluminum liquid; the assembly and installation of the filter station are helpful to filter and separate 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; by heating and pressurized filtration, the 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.

[0029] Example 3 On the basis of Example 2, step S34 is to place the test sample into the crucible 6 and seal it, and to pressurize and filter the aluminum liquid after heating and melting, including: 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; 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; 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.

[0030] 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 the 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 the impurities and slag in the aluminum liquid, and further improves 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 the subsequent evaluation results.

[0031] Example 4 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: (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.

[0032] Preferably, obtaining a comprehensive evaluation value of cleanliness of an aluminum alloy product based on a comprehensive evaluation matrix of cleanliness of an aluminum alloy product comprises: 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.

[0033] The working principle and beneficial effects of the above technical solution: the present invention takes 5 aluminum ingots for cleanliness test and takes n test samples for each aluminum ingot for 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 understand the cleanliness status of aluminum alloy products more comprehensively and objectively; By deleting the aluminum alloy product cleanliness evaluation values ​​and their corresponding cleanliness elements of all test samples of each aluminum ingot, it can be ensured that the evaluation results are not affected by a single test sample, but rather the evaluation results of multiple test samples are comprehensively considered. Deleting the maximum and minimum values ​​of the rank helps to exclude extreme values ​​in the evaluation results and reduce the impact 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 indicator of the comprehensive evaluation value can be obtained, which more accurately reflects the cleanliness of the aluminum alloy products.

[0034] Example 5 On the basis of Example 1, the main body of the device includes 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 fixed 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 the slag in the melt, with a thickness of 3.5 mm and a diameter of 26 mm.

[0035] Preferably, the heating rate of the heating module is The precision of the weighing module is 0.1g, the pressure of the pressurizing module is 0.099MPa, and the material of the crucible clamp (9) should be heat-resistant. The crucible (6) is made of a high temperature resistant graphite crucible and has an overall size of The sample tray (8) is made of heat-resistant stainless steel and has a size of .

[0036] The working principle and beneficial effects of the above technical solution are as follows: the equipment body is provided with a mobile chassis 11, which enables the equipment to be easily moved, is convenient for use in laboratories or production sites, and meets the needs of different places; a tool box 7 is installed on the equipment body, which is convenient for storing and carrying tools required for the experiment and improving the work efficiency at the experimental site; a structural design of a crucible 6, a middle cover 4 and an upper cover 3 is adopted to ensure the sealing of the test sample, and a pressure gauge 2 and a fixed steering wheel 1 are arranged on the upper cover 3 for convenient observation and operation; the weighing module has high precision and can accurately measure the weight change of the sample before and after melting, and provide accurate data for subsequent cleanliness calculation; the crucible 6 and the crucible tongs 9 are made of high temperature resistant materials, which can withstand the corrosion of high temperature environment and aluminum liquid, and ensure the service life and stability of the equipment; the sample receiving tray 8 is made of heat-resistant stainless steel and can withstand the reception of high temperature aluminum liquid; the filter station 12 is located at the outlet of the crucible 6 for convenient pressurized filtration process.

[0037] 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 equivalents, the present invention is also intended to include these modifications and variations.

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.

2. The cleanliness evaluation method of an Al-Si cast aluminum alloy product according to claim 1, characterized in that: 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.

3. The cleanliness evaluation method of an Al-Si cast aluminum alloy product according to claim 2, 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, 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; 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.

4. The cleanliness evaluation method of an Al-Si cast aluminum alloy product according to claim 2, characterized in that: The antioxidant component is silicon carbide, and the release agent component is boron nitride.

5. 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.

6. 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.

7. The cleanliness evaluation device for Al-Si cast aluminum alloy products according to claim 6, 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.

8. 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 7, 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.

9. The cleanliness evaluation device for Al-Si cast aluminum alloy products according to claim 8, 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.

10. The cleanliness evaluation device for Al-Si cast aluminum alloy products according to claim 9, characterized in that: The heating rate of the heating module is The precision of the weighing module is 0.1g, the pressure of the pressurizing module is 0.099MPa, and the material of the crucible clamp (9) should be heat-resistant. The crucible (6) is made of a high temperature resistant graphite crucible and has an overall size of The sample tray (8) is made of heat-resistant stainless steel and has a size of .

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