A quenching and tempering device and method for forgings

Abstract

The present invention relates to the field of heat treatment control technology, and in particular to a quenching and tempering device and method for forgings. The method installs thermocouple sensors at different detection depths in the forging, obtains temperature data of the heating process; analyzes the numerical changes of the temperature data to determine the temperature change index; determines the abnormal interference degree of the central depth of the two detection depths according to the fluctuation of the temperature change index at two adjacent detection depths; determines the abnormal interference attenuation coefficient according to the depth difference and abnormal interference degree difference of the two adjacent central depths; and then determines the interference index of the detection depth; determines the degree of temperature uniformity requirement according to the interference index and temperature data, and adjusts the heating speed of the forging at the current moment according to the degree of temperature uniformity requirement. The present invention can analyze the temperature changes at different detection depths, eliminate the influence of abnormal interference, facilitate the uniform heating effect of the forging, and improve the quality of quenching and tempering of the forging.

Description

Technical Field

[0001] The invention relates to the technical field of heat treatment control, and in particular to a quenching and tempering treatment device and method for forgings. Background Art

[0002] The quenching stage in the tempering treatment of forgings mainly includes the heating stage, the insulation stage and the cooling stage. The heating stage requires precise control of the heating rate of the forgings. If the heating rate is too fast, it will cause excessive thermal stress and even cracks in the forgings. If the heating rate is too slow, it is easy to form grain coarsening, and the grain boundaries will continue to migrate and merge, which will affect the performance of the material.

[0003] The existing technology (such as a forging temperature detection device in solution CN113701898B) measures the temperature of the forging through a thermocouple sensor, and then automatically controls the heating speed of the heating furnace through a control system such as a computer. However, since the thermocouple sensor can only measure the local temperature, it is necessary to set a step-by-step heating curve in advance based on experience to ensure that the forging is completely and evenly heated. In this way, due to abnormal influences such as electromagnetic radiation and light radiation in the scene, the temperature value measured by the thermocouple sensor is interfered, making it impossible to effectively achieve a uniform heating effect on the forging, and the quality of the forging tempering is poor. Summary of the invention

[0004] In order to solve the technical problem in the related art that the temperature value measured by the thermocouple sensor is disturbed by abnormal influences such as electromagnetic radiation and light radiation in the scene, so that the uniform heating effect of the forging cannot be effectively achieved and the quality of the forging tempering is poor, the present invention provides a tempering treatment device and method for forgings, and the technical scheme adopted is as follows:

[0005] The present invention provides a quenching and tempering method for forgings, wherein thermocouple sensors are installed at different detection depths in the forgings, wherein the detection depths of the forgings are at least three, and the maximum detection depth is half of the thickness of the forgings, and the method comprises:

[0006] Acquire the temperature data collected by different thermocouple sensors at different times during the heating process; determine the temperature change index of the latter moment in the adjacent moments according to the value change of the temperature data of any thermocouple sensor at two adjacent moments;

[0007] In a preset time window before the current moment, according to the fluctuation of the temperature change index at two adjacent detection depths, the abnormal interference degree of the central depth of the two detection depths is determined;

[0008] In a preset time window, according to the depth difference between two adjacent center depths and the difference in the degree of abnormal interference, the abnormal interference attenuation coefficient when the inspection depth of the forging increases is determined;

[0009] According to the difference between different detection depths and the maximum detection depth, and the abnormal interference attenuation coefficient, the interference index of different detection depths is determined; at the current moment, according to the interference index and temperature data of different detection depths, the temperature uniformity requirement at the current moment is determined, and the heating rate of the forging at the current moment is adjusted according to the temperature uniformity requirement.

[0010] Further, the method of determining the abnormal interference degree of the central depths of the two detection depths according to the fluctuation of the temperature change index at two adjacent detection depths includes:

[0011] The average of two adjacent detection depths is taken as the central depth of the corresponding two detection depths;

[0012] Performing fluctuation similarity analysis on the temperature change indexes at two adjacent detection depths within a preset time window to determine a first interference influence coefficient;

[0013] The difference in the mean values ​​of the temperature change indicators at two adjacent detection depths within the preset time window is used as the second interference influence coefficient;

[0014] The first interference influence coefficient and the second interference influence coefficient are forwardly fused and normalized to obtain the abnormal interference degree corresponding to the center depth.

[0015] Furthermore, the fluctuation similarity analysis of the temperature change index at two adjacent detection depths within the preset time window is performed to determine the first interference influence coefficient, including:

[0016] Based on the dynamic time warping algorithm, the temperature change index of two adjacent detection depths at different times in the preset time window is analyzed to determine the DTW value;

[0017] Calculate the variance of the temperature change index at each detection depth within the preset time window to obtain the change variance;

[0018] The absolute value of the difference between the variances of two adjacent detection depths is taken as the variance coefficient;

[0019] The product of the DTW value and the variance coefficient is normalized and used as the first interference influence coefficient.

[0020] Further, the abnormal interference attenuation coefficient when the detection depth of the forging increases is determined according to the depth difference between two adjacent center depths and the difference in the degree of abnormal interference, including:

[0021] The ratio of the absolute value of the difference between the abnormal interference levels of two adjacent central depths to the absolute value of the depth difference is used as the initial attenuation coefficient corresponding to the two central depths;

[0022] The average of all initial attenuation coefficients is calculated as the abnormal interference attenuation coefficient.

[0023] Further, the interference index of the maximum detection depth is set as a preset constant, and the interference index of different detection depths is determined according to the difference between different detection depths and the maximum detection depth, and the abnormal interference attenuation coefficient, including:

[0024] The absolute value of the difference between any detection depth and the maximum detection depth is taken as the depth difference value;

[0025] The product of the depth difference value and the abnormal interference attenuation coefficient is used as the interference attenuation index corresponding to the detection depth;

[0026] The sum of the interference attenuation index and a preset constant is calculated to obtain an interference index corresponding to the detection depth.

[0027] Furthermore, according to the interference index and temperature data of different detection depths, the degree of temperature uniformity requirement at the current moment is determined, including:

[0028] The temperature data is numerically adjusted according to the interference index at the same detection depth to obtain the adjusted temperature;

[0029] The extreme differences of all adjusted temperatures are normalized and used as the temperature uniformity requirement at the current moment.

[0030] Further, the temperature data is numerically adjusted according to the interference index at the same detection depth to obtain the adjusted temperature, including:

[0031] Multiplying the interference index by a preset impact temperature to obtain an interference temperature;

[0032] The sum of the interference temperature and the temperature data is used as the adjustment temperature.

[0033] Further, adjusting the heating rate of the forging at the current moment according to the temperature uniformity requirement includes:

[0034] Normalizing the inverse of the temperature uniformity requirement to obtain a temperature rise coefficient;

[0035] The temperature rise coefficient is multiplied by the preset initial temperature rise rate to obtain the temperature rise rate of the forging at the current moment.

[0036] Further, according to the numerical change of the temperature data of any thermocouple sensor at two adjacent moments, determining the temperature change index of the latter moment in the adjacent moments includes:

[0037] In two adjacent moments, the absolute value of the difference between the temperature data of the latter moment and the previous moment is calculated to obtain the temperature change index of the latter moment in the adjacent moments.

[0038] On the other hand, the present invention also provides a tempering treatment device for forgings, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the steps of any of the methods described above when executing the computer program.

[0039] The present invention has the following beneficial effects:

[0040] In the embodiment of the present invention, by installing thermocouple sensors at different detection depths in the forging, temperature detection is performed. Since the thermocouple sensors are susceptible to abnormal interference such as electromagnetic radiation interference and light radiation interference, the abnormal interference can be specifically analyzed. The temperature change index at different times is determined by the numerical change of the temperature data, and then the abnormal interference degree of the center depth is determined according to the fluctuation of the temperature change index, so as to effectively analyze the abnormal interference degree, which is convenient for the subsequent numerical change of the abnormal interference degree at different detection depths to determine the abnormal interference attenuation coefficient; based on the abnormal interference attenuation coefficient, the interference index of each detection depth is specifically calculated, so as to numerically visualize the influence of abnormal interference such as electromagnetic radiation interference and light radiation interference on the change of temperature data, and the acquisition of the temperature uniformity requirement degree is realized based on the interference index. The temperature uniformity requirement degree can effectively characterize the demand effect of temperature uniformity at the current moment, and then adjust the heating rate of the forging at the current moment according to the temperature uniformity requirement degree. In summary, in the embodiment of the present invention, the temperature change at different detection depths can be analyzed, the influence of abnormal interference can be eliminated, and a more accurate and effective heating rate can be determined, so as to facilitate the uniform heating effect of the forging and improve the quality of the quenching and tempering of the forging. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 A schematic diagram of a thermocouple sensor punching method provided by an embodiment of the present invention;

[0043] Figure 2 A flow chart of a quenching and tempering method for forgings provided in one embodiment of the present invention;

[0044] Figure 3 A schematic diagram of the center depth provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0045] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description of a quenching and tempering device and method for forgings proposed by the present invention, its specific implementation, structure, features and effects, in conjunction with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0046] Some explanations of terms in this plan:

[0047] The quenching and tempering of forgings refers to a double heat treatment process of quenching and high temperature tempering, the purpose of which is to make the forgings have good comprehensive mechanical properties. During the quenching process, the material is heated to above the austenitizing temperature and rapidly cooled to form hard structures such as martensite or bainite; while in the tempering stage, the forging material is heated to a temperature below the melting point to release the stress in the structure and further strengthen the material.

[0048] Thermocouple sensor is a contact temperature measuring device. The main scenario of this solution is a resistance heating furnace, and the main temperature is usually between 600 degrees Celsius and 1000 degrees Celsius. Therefore, the thermocouple sensor used can be a platinum-rhodium thermocouple temperature sensor, for example.

[0049] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0050] The specific scheme of the quenching and tempering method for forgings provided by the present invention is described in detail below with reference to the accompanying drawings.

[0051] In the forging surface scenario, a threaded hole of a specific depth is punched on the forging surface, and a thermocouple sensor is inserted into the threaded hole and sealed to detect the temperature value at the corresponding depth.

[0052] Specifically, an exemplary scenario is described as follows: threaded holes of different depths are drilled on the surface of a forging. It is necessary to ensure that the depth difference of the threaded holes is large and that the performance of the forging itself is not affected as much as possible. Therefore, the depth generally does not exceed one-half of the diameter of the forging, that is, the maximum detection depth is half of the thickness of the forging.

[0053] At least three threaded holes are set on the surface of the forging, and the depth is determined according to the actual situation. The refractory fiber is wound on the platinum-rhodium thermocouple temperature sensor, and the end of the platinum-rhodium thermocouple temperature sensor is exposed from the refractory fiber by 1mm-2mm. The platinum-rhodium thermocouple temperature sensor is inserted into the nut, clamp and hollow stud of the sealing port in sequence by using a telescopic rod made of high-temperature resistant material to realize temperature data collection.

[0054] It should be noted that, since different thermocouple sensors need to be inserted at the same time, threaded holes corresponding to different depths may be punched at different positions for each thermocouple sensor.

[0055] See also Figure 1 , Figure 1 A schematic diagram of drilling a thermocouple sensor provided in one embodiment of the present invention, wherein “h1”, “h2” and “h3” represent different drilling depths, i.e. different detection depths, and “h3” is half of the thickness of the forging.

[0056] It should be noted that the temperature acquisition frequency of all thermocouple sensors is consistent, that is, at the same time, all thermocouple sensors (such as Figure 1 The first thermocouple, the second thermocouple and the third thermocouple in the thermocouple are simultaneously collected once the temperature value is obtained.

[0057] See also Figure 2 , which shows a flow chart of a quenching and tempering method for forgings provided by one embodiment of the present invention, the method comprising:

[0058] S101: Acquire temperature data collected by different thermocouple sensors at different times during the heating process; determine a temperature change index at a later time in the adjacent time according to the value change of the temperature data of any thermocouple sensor at two adjacent times.

[0059] The temperature data refers specifically to the temperature value collected by the thermocouple sensor. In the embodiment of the present invention, the temperature data may be collected every 5 seconds. Thus, each thermocouple sensor may collect a plurality of temperature data during the heating process.

[0060] Among them, the heating process is specifically the process of heating the forging in a heating furnace. When the forging is heated in a heating furnace, the surface of the forging is directly exposed to the heating source, and the heat is transferred to the surface by thermal radiation, convection, etc., and the heating rate is generally fast; while the inside of the forging needs to be gradually transferred to the inside through the temperature of the external material, and the heat transfer resistance is large, resulting in a low heating rate. In addition, the material of the forging is different, and the heating rate difference inside and outside the forging is also different.

[0061] Therefore, it is necessary to control the heating rate of the heating furnace in real time to ensure that the internal and external temperatures of the forgings remain consistent. When the difference between the external and internal temperatures is large, it is necessary to reduce the heating rate and maintain the temperature in the furnace to fully heat the inside of the material and avoid uneven internal and external heating that affects the performance of the forgings.

[0062] It can be understood that reducing the heating rate slows down the overall temperature increase, thereby allowing the inside of the forging to have more sufficient time for heating treatment and improving the temperature uniformity inside and outside the forging.

[0063] Based on this, the embodiment of the present invention realizes reasonable adjustment of the heating rate by specifically analyzing the temperature change dimensions at different depths and the temperature change dimensions at different times at the same depth.

[0064] Dimensional analysis of temperature changes at different moments at the same depth: Further, in some embodiments of the present invention, the temperature change index of the latter moment among adjacent moments is determined based on the numerical change of temperature data of any thermocouple sensor at two adjacent moments, including: at two adjacent moments, calculating the absolute value of the difference between the temperature data of the latter moment and the previous moment, to obtain the temperature change index of the latter moment among adjacent moments.

[0065] It should be noted that, in the embodiment of the present invention, adjacent mainly means the closest distance. For example, two adjacent moments are the two moments closest to each other, and the corresponding adjacent detection depths are the two detection depths closest to each other. Figure 3 In the figure, “h1” and “h2”, and “h2” and “h3” are two adjacent detection depths.

[0066] Among them, the absolute value of the difference between the temperature data of the latter moment and the previous moment is the absolute value of the difference value obtained by the first-order difference processing. The larger the value, the greater the temperature change between the two adjacent moments. At this time, the greater the overall heating rate, the greater the corresponding temperature change rate. The temperature change index can be used to characterize the heating rate corresponding to the two moments, and it can be used as the characteristic parameter of the latter moment of the two moments.

[0067] S102: Determine the abnormal interference degree of the central depths of the two detection depths according to the fluctuation of the temperature change index at two adjacent detection depths within a preset time window before the current moment.

[0068] Among them, the preset time window can be specifically a time length of 5 minutes during the duration of the heating process, or it can also start timing after the heating process lasts for 1 minute until the time window at the current moment. It is adjusted according to the actual detection situation and there is no restriction on this.

[0069] In the embodiment of the present invention, during the heating process, due to the properties of the material, the radiation of external light (mainly the high light in the heating furnace), and the electromagnetic interference of the thermocouple sensor during the detection process, the detected temperature data cannot accurately represent the specific value of the temperature and is subject to various abnormal interferences.

[0070] For example, thermocouple sensors are easily affected by electromagnetic interference, which can cause deviations in the measured temperature. After entering the interior of a metal forging, due to the relatively narrow space, it is easy to form an electromagnetic shielding space, and the amount of electromagnetic interference it is subject to varies.

[0071] It is understandable that although the interference degree is different, the interference trend change is the same. Whether it is electromagnetic interference or external light radiation interference, the effect is weaker when it is closer to the inside of the forging; in the embodiment of the present invention, according to the fluctuation of the temperature change index at two adjacent detection depths, the abnormal interference degree of the central depth of the two detection depths is determined, thereby, the abnormal interference situation can be specifically analyzed.

[0072] The center depth is the midpoint of the two corresponding depth positions in the corresponding depth direction, see Figure 3 Conduct a specific analysis. Figure 3 A schematic diagram of the center depth provided for an embodiment of the present invention; "h1" and "h2" correspond to the midpoint of the detection depth, which is the first center depth; "h2" and "h3" correspond to the midpoint of the detection depth, which is the second center depth.

[0073] Furthermore, in some embodiments of the present invention, the degree of abnormal interference of the central depth of two detection depths is determined according to the fluctuation of the temperature change index at two adjacent detection depths, including: taking the mean of the two adjacent detection depths as the central depth of the corresponding two detection depths; performing a fluctuation similarity analysis on the temperature change index at two adjacent detection depths within a preset time window to determine a first interference influence coefficient; taking the difference in the mean of the temperature change index at two adjacent detection depths within the preset time window as the second interference influence coefficient; forward fusing the first interference influence coefficient and the second interference influence coefficient, and normalizing them to obtain the degree of abnormal interference of the corresponding central depth.

[0074] It is understandable that in an interference-free state, the temperature changes at different detection depths are highly similar, but due to various interference effects such as electromagnetic interference and external light radiation interference, similarity differences occur. Therefore, similarity analysis is performed and the differences are determined to further determine abnormal interference situations.

[0075] Furthermore, in some embodiments of the present invention, a fluctuation similarity analysis is performed on the temperature change index at two adjacent detection depths within a preset time window to determine a first interference influence coefficient, including: based on a dynamic time warping algorithm, analyzing the temperature change index of two adjacent detection depths at different times in the preset time window to determine the DTW value; calculating the variance of the temperature change index at each detection depth within the preset time window to obtain a change variance; taking the absolute value of the difference between the change variances at two adjacent detection depths as the variance coefficient; and normalizing the product of the DTW value and the variance coefficient as the first interference influence coefficient.

[0076] Among them, the dynamic time warping algorithm is an algorithm for performing similarity analysis of time series. The smaller the DTW value obtained, the more similar the two corresponding sequences are. On the contrary, the larger the DTW value, the greater the difference between the two corresponding sequences. Therefore, in the embodiment of the present invention, the temperature change indicators at different times at the same detection depth are arranged in time series as a sequence, and the DTW value is calculated. The larger the DTW value, the lower the similarity of the temperature changes at the two detection depths, that is, the greater the impact of abnormal interference.

[0077] Among them, the variance represents the change fluctuation. The larger the difference in variance, the larger the difference in temperature change fluctuation. Therefore, in the embodiment of the present invention, the product of the DTW value and the variance coefficient is normalized as the first interference influence coefficient, that is, the first interference influence coefficient represents the similarity of the change fluctuation. The larger its value is, the greater the influence of abnormal interference is.

[0078] In an embodiment of the present invention, the difference in the mean values ​​of the temperature change index at two adjacent detection depths within a preset time window is used as the second interference influence coefficient. The mean value represents the numerical value of the temperature change. It should be noted that, since it is a heating process, as the temperature is gradually transferred from the outside to the inside without interference, the temperature value shows a certain difference, but the temperature change tends to be stable, that is, the numerical value of the temperature change index is relatively small. Therefore, by calculating the difference in the mean value of the temperature change index, the difference in the current internal and external temperature changes is represented. The larger the second interference influence coefficient, the greater the interference influence corresponding to the numerical analysis of the temperature change.

[0079] In the embodiment of the present invention, positive fusion means that the fusion result is positively correlated with the fusion index, that is, the larger the value of the fusion index, the larger the value of the corresponding fusion result. The first interference influence coefficient and the second interference influence coefficient in the embodiment of the present invention are fusion indicators, and the abnormal interference degree represents the fusion result. Therefore, the product of the first interference influence coefficient and the second interference influence coefficient can be directly calculated, and the maximum and minimum values ​​can be normalized to obtain the abnormal interference degree corresponding to the center depth.

[0080] It should be noted that the abnormal interference degree of the central depth essentially refers to the abnormal interference degree obtained at the two detection depths corresponding to the central depth. In order to facilitate further analysis later, it is taken as the abnormal interference degree of the central depth.

[0081] S103: within a preset time window, according to the depth difference between two adjacent center depths and the difference in the degree of abnormal interference, determining the abnormal interference attenuation coefficient when the inspection depth of the forging increases.

[0082] It can be understood that since the detection depth is at least 3, that is, there are at least two levels of abnormal interference, different levels of abnormal interference have certain different effects, and the different effects are mainly caused by the change of interference at different depths. For example, the deeper the depth, the stronger the electromagnetic shielding, and the less susceptible to external light radiation. Therefore, in an embodiment of the present invention, the abnormal interference attenuation coefficient is determined by analyzing the changes in the abnormal interference degree and the depth changes, that is, the attenuation of the abnormal interference with the increase of the detection depth.

[0083] Furthermore, in some embodiments of the present invention, the ratio of the absolute value of the difference in abnormal interference levels between two adjacent center depths to the absolute value of the depth difference is used as the initial attenuation coefficient corresponding to the two center depths; and the average of all initial attenuation coefficients is calculated as the abnormal interference attenuation coefficient.

[0084] In the embodiment of the present invention, by calculating the ratio of the change in the abnormal interference degree to the change in the detection depth, the change in the abnormal interference degree per unit detection depth is obtained, and the ratio is used as the initial attenuation coefficient.

[0085] By taking the average of all initial attenuation coefficients and performing unified processing, the obtained abnormal interference attenuation coefficient is made more accurate and objective, thereby reducing the impact of excessively abnormal interference at a certain location.

[0086] S104: Determine the interference index of different detection depths according to the difference between different detection depths and the maximum detection depth, and the abnormal interference attenuation coefficient; at the current moment, determine the temperature uniformity requirement at the current moment according to the interference index and temperature data of different detection depths, and adjust the heating rate of the forging at the current moment according to the temperature uniformity requirement.

[0087] The interference index is a numerical representation obtained by combining the abnormal interference attenuation coefficient and the detection depth itself.

[0088] Furthermore, the interference index of the maximum detection depth is set to a preset constant, and the interference index of different detection depths is determined according to the difference between different detection depths and the maximum detection depth, and the abnormal interference attenuation coefficient, including: taking the absolute value of the difference between any detection depth and the maximum detection depth as the depth difference value; taking the product of the depth difference value and the abnormal interference attenuation coefficient as the interference attenuation index of the corresponding detection depth; calculating the sum of the interference attenuation index and the preset constant to obtain the interference index of the corresponding detection depth.

[0089] In the embodiment of the present invention, the preset constant can be set according to the actual forging material and scene. Optionally, the preset constant can be specifically 0, that is, the center thickness of the forging is set not to be affected by electromagnetic radiation and light radiation interference.

[0090] The interference index of the detection depth is a linear analysis based on a preset constant, the detection depth and the difference between the maximum detection depth, that is, by calculating the change value of the corresponding depth, and taking the sum of the change value and the preset constant as the interference index.

[0091] In the embodiment of the present invention, the interference index can accurately characterize the influence of abnormal interference on the corresponding detection depth, which is convenient for subsequent interference analysis.

[0092] Furthermore, in some embodiments of the present invention, the degree of temperature uniformity requirement at the current moment is determined based on interference indicators and temperature data at different detection depths, including: numerically adjusting the temperature data based on the interference indicators at the same detection depth to obtain the adjusted temperature; and normalizing the extreme differences of all adjusted temperatures as the degree of temperature uniformity requirement at the current moment.

[0093] It should be noted that the greater the abnormal interference, the lower the accuracy of the temperature data collected by the thermocouple sensor at the current moment. In order to achieve uniform heating, it is necessary to eliminate the influence of the interference index. Therefore, the temperature data is adjusted by the interference index to obtain the adjusted temperature. The adjusted temperature represents the temperature value at the corresponding detection depth after analyzing the interference index.

[0094] Furthermore, in some embodiments of the present invention, the temperature data is numerically adjusted according to the interference index at the same detection depth to obtain the adjusted temperature, including: multiplying the interference index with the preset influencing temperature to obtain the interference temperature; and taking the sum of the interference temperature and the temperature data as the adjusted temperature.

[0095] It should be noted that the preset impact temperature is the preset temperature value at which the actual interference affects the thermocouple sensor. Optionally, the preset impact temperature can be specifically 100 degrees Celsius, for example, or it can be set according to the forging material and the scenario, without limitation.

[0096] It should be noted that, in actual situations, in order to ensure the safety of the overall operation, the temperature rise of the forging is a step-by-step process. When the internal temperature is close to the surface temperature, the heating power can be appropriately adjusted and the heating rate can be increased to proceed to the next stage of heating. If the temperature difference between the inside and the outside is large, it is necessary to reduce or maintain the current power to ensure uniform heating inside the core of the forging.

[0097] Therefore, when the interference effect is large, in order to ensure the heating effect of the forging itself, the heating rate needs to be reduced. The present invention improves the temperature difference at different detection depths through the interference index, so that the obtained data has a larger temperature difference, thereby achieving the effect of reducing the heating rate.

[0098] The adjusted temperature is the temperature value after the influence of the interference index is expanded. By adjusting the temperature, the range of all adjusted temperatures becomes larger, and the demand for temperature uniformity also becomes larger. The range is normalized as the degree of temperature uniformity demand at the current moment. The degree of temperature uniformity demand represents the demand index for temperature uniformity under the current situation. The larger the value, the more uniform the temperature distribution is needed, that is, the heating rate should be reduced synchronously.

[0099] Furthermore, in some embodiments of the present invention, the heating rate of the forging at the current moment is adjusted according to the degree of temperature uniformity requirement, including: normalizing the inverse of the degree of temperature uniformity requirement to obtain a heating coefficient; multiplying the heating coefficient by a preset initial heating rate to obtain the heating rate of the forging at the current moment.

[0100] Among them, the preset initial heating rate, that is, the heating rate under the rated power of the heating furnace itself, can be set, specifically, it can be 50 degrees Celsius per minute, or it can be set according to the material requirements of the forging itself, and there is no restriction on this.

[0101] Since the higher the value of the temperature uniformity requirement is, the greater the demand for temperature uniformity is, that is, the more the heating rate needs to be reduced to improve the overall uniformity of the internal and external temperatures of the forging, the inverse of the temperature uniformity requirement is normalized to obtain the heating coefficient, and the heating coefficient is multiplied by the preset initial heating rate to obtain the heating rate of the forging at the current moment.

[0102] Then, the actual required current size can be converted according to the relationship between the heating rate and the power of the heating furnace, and the heating process of the forging can be controlled in real time, thereby ensuring the uniform rise of the overall temperature of the forging and improving the performance of quenching and tempering in the tempering treatment.

[0103] In the embodiment of the present invention, by installing thermocouple sensors at different detection depths in the forging, temperature detection is performed. Since the thermocouple sensors are susceptible to abnormal interference such as electromagnetic radiation interference and light radiation interference, the abnormal interference can be specifically analyzed. The temperature change index at different times is determined by the numerical change of the temperature data, and then the abnormal interference degree of the center depth is determined according to the fluctuation of the temperature change index, so as to effectively analyze the abnormal interference degree, which is convenient for the subsequent numerical change of the abnormal interference degree at different detection depths to determine the abnormal interference attenuation coefficient; based on the abnormal interference attenuation coefficient, the interference index of each detection depth is specifically calculated, so as to numerically visualize the influence of abnormal interference such as electromagnetic radiation interference and light radiation interference on the change of temperature data, and the acquisition of the temperature uniformity requirement degree is realized based on the interference index. The temperature uniformity requirement degree can effectively characterize the demand effect of temperature uniformity at the current moment, and then adjust the heating rate of the forging at the current moment according to the temperature uniformity requirement degree. In summary, in the embodiment of the present invention, the temperature change at different detection depths can be analyzed, the influence of abnormal interference can be eliminated, and a more accurate and effective heating rate can be determined, so as to facilitate the uniform heating effect of the forging and improve the quality of the quenching and tempering of the forging.

[0104] The present invention also provides a tempering treatment device for forgings, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the aforementioned tempering treatment method for forgings are implemented.

[0105] It should be noted that the sequence of the above embodiments of the present invention is only for description and does not represent the advantages and disadvantages of the embodiments. The processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0106] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

Claims

1. A method for quenching and tempering for forgings, characterized in that: Installing thermocouple sensors at different detection depths in the forging, wherein the forging has at least three detection depths and the maximum detection depth is half the thickness of the forging, the method comprising: Acquire the temperature data collected by different thermocouple sensors at different times during the heating process; determine the temperature change index of the latter moment in the adjacent moments according to the value change of the temperature data of any thermocouple sensor at two adjacent moments; In a preset time window before the current moment, according to the fluctuation of the temperature change index at two adjacent detection depths, the abnormal interference degree of the central depth of the two detection depths is determined; In a preset time window, according to the depth difference between two adjacent center depths and the difference in the degree of abnormal interference, the abnormal interference attenuation coefficient when the inspection depth of the forging increases is determined; According to the difference between different detection depths and the maximum detection depth, and the abnormal interference attenuation coefficient, the interference index of different detection depths is determined; at the current moment, according to the interference index and temperature data of different detection depths, the temperature uniformity requirement at the current moment is determined, and the heating rate of the forging at the current moment is adjusted according to the temperature uniformity requirement.

2. A quenching and tempering method for forgings according to claim 1, characterized in that: The method of determining the abnormal interference degree of the central depths of the two detection depths according to the fluctuation of the temperature change index at the two adjacent detection depths includes: The average of two adjacent detection depths is taken as the central depth of the corresponding two detection depths; Performing fluctuation similarity analysis on the temperature change indexes at two adjacent detection depths within a preset time window to determine a first interference influence coefficient; The difference in the mean values ​​of the temperature change indicators at two adjacent detection depths within the preset time window is used as the second interference influence coefficient; The first interference influence coefficient and the second interference influence coefficient are forwardly fused and normalized to obtain the abnormal interference degree corresponding to the center depth.

3. A quenching and tempering method for forgings according to claim 2, characterized in that: The method of performing fluctuation similarity analysis on the temperature change index at two adjacent detection depths within the preset time window to determine the first interference influence coefficient includes: Based on the dynamic time warping algorithm, the temperature change index of two adjacent detection depths at different times in the preset time window is analyzed to determine the DTW value; Calculate the variance of the temperature change index at each detection depth within the preset time window to obtain the change variance; The absolute value of the difference between the variances of two adjacent detection depths is taken as the variance coefficient; The product of the DTW value and the variance coefficient is normalized and used as the first interference influence coefficient.

4. A quenching and tempering method for forgings according to claim 1, characterized in that: The method of determining the abnormal interference attenuation coefficient when the detection depth of the forging increases according to the depth difference between two adjacent center depths and the difference in the degree of abnormal interference includes: The ratio of the absolute value of the difference between the abnormal interference levels of two adjacent central depths to the absolute value of the depth difference is used as the initial attenuation coefficient corresponding to the two central depths; The average of all initial attenuation coefficients is calculated as the abnormal interference attenuation coefficient.

5. A quenching and tempering method for forgings according to claim 1, characterized in that: The interference index of the maximum detection depth is set as a preset constant, and the interference index of different detection depths is determined according to the difference between different detection depths and the maximum detection depth, and the abnormal interference attenuation coefficient, including: The absolute value of the difference between any detection depth and the maximum detection depth is taken as the depth difference value; The product of the depth difference value and the abnormal interference attenuation coefficient is used as the interference attenuation index corresponding to the detection depth; The sum of the interference attenuation index and a preset constant is calculated to obtain an interference index corresponding to the detection depth.

6. A quenching and tempering method for forgings according to claim 1, characterized in that: According to the interference index and temperature data at different detection depths, determine the degree of temperature uniformity required at the current moment, including: The temperature data is numerically adjusted according to the interference index at the same detection depth to obtain the adjusted temperature; The extreme differences of all adjusted temperatures are normalized and used as the temperature uniformity requirement at the current moment.

7. A quenching and tempering method for forgings according to claim 6, characterized in that: The temperature data is numerically adjusted according to the interference index at the same detection depth to obtain the adjusted temperature, including: Multiplying the interference index by a preset impact temperature to obtain an interference temperature; The sum of the interference temperature and the temperature data is used as the adjustment temperature.

8. A quenching and tempering method for forgings according to claim 1, characterized in that: Adjusting the heating rate of the forging at the current moment according to the temperature uniformity requirement includes: Normalizing the inverse of the temperature uniformity requirement to obtain a temperature rise coefficient; The temperature rise coefficient is multiplied by the preset initial temperature rise rate to obtain the temperature rise rate of the forging at the current moment.

9. A quenching and tempering method for forgings according to claim 1, characterized in that: According to the numerical change of the temperature data of any thermocouple sensor at two adjacent moments, the temperature change index of the latter moment in the adjacent moments is determined, including: In two adjacent moments, the absolute value of the difference between the temperature data of the latter moment and the previous moment is calculated to obtain the temperature change index of the latter moment in the adjacent moments.

10. A tempering device for forgings, the device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 9 are implemented.

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