Method, equipment and medium for determining size of evaporation boat molten pool

Abstract

The invention discloses a method, equipment and medium for determining the size of an evaporation boat molten pool, and relates to the technical field of film plating. The method comprises the steps that the dry burning voltage and the dry burning current of an evaporation boat are determined; wire feeding parameters of the evaporation boat are obtained, a metal wire is conveyed to the evaporation boat according to the wire feeding parameters, the metal wire fed into the evaporation boat enters a molten state under the action of heat generated by the evaporation boat, and the evaporation boat containing a molten pool is formed; the molten pool voltage and the molten pool current of the evaporation boat containing the molten pool are determined, and the electrode heat release rate factor of the evaporation boat is calculated according to the dry burning voltage, the dry burning current, the molten pool voltage and the molten pool current; the electrode heat release rate factor of the evaporation boat is used for determining the molten pool size of the evaporation boat. According to the method, the electrode heat release rate factor of the evaporation boat is calculated according to the voltage and current of the evaporation boat in the dry burning state and the voltage and current of the evaporation boat containing the molten pool formed after the evaporation boat enters the molten state, and then the size of the molten pool of the evaporation boat is rapidly and accurately determined in a numerical value quantification mode.

Description

Technical Field

[0001] This invention relates to the field of coating technology, and in particular to a method, apparatus and medium for determining the size of the molten pool in an evaporation boat. Background Technology

[0002] Composite current collectors possess high energy density, good cycle life, sufficient overcharge protection, stable high-current discharge capability, and excellent safety performance. They can also reduce battery costs, making them one of the best solutions for achieving high-energy-density batteries. Physical vapor deposition (PVD) vacuum coating is currently the main production method for aluminum / copper composite current collectors. The film quality is closely related to the molten pool size; therefore, the efficiency and accuracy of molten pool size determination are key concerns in the field of coating technology.

[0003] Currently, the main methods for determining the size of the molten pool are visual inspection and image analysis. Visual inspection involves monitoring personnel directly observing the molten pool through an observation window to determine its size. Image analysis, on the other hand, uses specific observation channels to acquire image information of the molten pool and thus determine its size. However, visual inspection has limited diagnostic efficiency and accuracy; the intense light generated by high temperatures can also damage the eyesight of monitoring personnel, making it impractical and posing certain safety hazards. Image analysis can only acquire images of the molten pool from specific angles, failing to provide a complete view and easily leading to misjudgments. Therefore, how to simply, quickly, and accurately assess the size of the molten pool to improve the film quality of PVD vacuum coating is an urgent problem to be solved. Summary of the Invention

[0004] This invention provides a method, apparatus, and medium for determining the size of the molten pool in an evaporation boat. It can calculate the electrode heat release factor of the evaporation boat based on the dry-burning voltage and current of the evaporation boat in the dry-burning state, and the molten pool voltage and current of the evaporation boat containing the molten pool after the evaporation boat enters the molten state, so as to quickly and accurately determine the size of the molten pool of the evaporation boat in a quantitative way.

[0005] According to one aspect of the present invention, a method for determining the size of an evaporation boat molten pool is provided, the method comprising:

[0006] Determine the dry-burning voltage and dry-burning current of the evaporation boat;

[0007] Obtain the wire feeding parameters of the evaporation boat and feed the metal wire into the evaporation boat according to the wire feeding parameters. The metal wire fed into the evaporation boat enters the molten state under the action of the heat generated by the evaporation boat, forming an evaporation boat containing a molten pool.

[0008] Determine the molten pool voltage and molten pool current of the evaporation boat containing the molten pool, and calculate the electrode heat release factor of the evaporation boat based on the dry burning voltage, dry burning current, molten pool voltage, and molten pool current; wherein, the electrode heat release factor of the evaporation boat is used to determine the molten pool size of the evaporation boat.

[0009] According to another aspect of the present invention, an apparatus for determining the size of an evaporator boat molten pool is provided. This apparatus is used to implement the method for determining the size of an evaporator boat molten pool in any embodiment of the present invention. The apparatus includes:

[0010] The parameter determination module is used to determine the dry-burning voltage and dry-burning current of the evaporation boat;

[0011] The wire feeding control module is used to acquire the wire feeding parameters of the evaporation boat and feed the metal wire to the evaporation boat according to the wire feeding parameters. The metal wire fed into the evaporation boat enters the molten state under the action of the heat generated by the evaporation boat, forming an evaporation boat containing a molten pool.

[0012] The factor calculation module is used to determine the molten pool voltage and molten pool current of the evaporation boat containing the molten pool, and to calculate the electrode heat release factor of the evaporation boat based on the dry burning voltage, dry burning current, molten pool voltage and molten pool current; wherein, the electrode heat release factor of the evaporation boat is used to determine the molten pool size of the evaporation boat.

[0013] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0014] At least one processor; and a memory communicatively connected to the at least one processor;

[0015] The memory stores a computer program that can be executed by at least one processor, which enables the at least one processor to perform the method for determining the size of the evaporator boat molten pool in any embodiment of the present invention.

[0016] According to another aspect of the present invention, a computer-readable storage medium is provided storing computer instructions for causing a processor to execute a method for determining the size of the evaporation boat molten pool in any embodiment of the present invention.

[0017] According to another aspect of the present invention, a computer program product is provided, comprising a computer program that, when executed by a processor, implements a method for determining the size of the evaporation boat molten pool according to any embodiment of the present invention.

[0018] The method for determining the molten pool size of an evaporation boat according to the present invention includes: determining the dry-burning voltage and dry-burning current of the evaporation boat; obtaining the wire feeding parameters of the evaporation boat and feeding metal wire into the evaporation boat according to the wire feeding parameters, wherein the metal wire fed into the evaporation boat enters a molten state under the action of the heat generated by the evaporation boat, forming an evaporation boat containing a molten pool; determining the molten pool voltage and molten pool current of the evaporation boat containing the molten pool, and calculating the electrode heat release ratio factor of the evaporation boat based on the dry-burning voltage, dry-burning current, molten pool voltage, and molten pool current; wherein the electrode heat release ratio factor of the evaporation boat is used to determine the molten pool size of the evaporation boat. The technical solution of the present invention calculates the electrode heat release ratio factor of the evaporation boat based on the dry-burning voltage and dry-burning current of the evaporation boat in the dry-burning state and the molten pool voltage and molten pool current of the evaporation boat containing a molten pool after the evaporation boat enters the molten state, thereby determining the molten pool size of the evaporation boat simply, safely, quickly, and accurately in a quantitative manner. It solves the problems of limited efficiency and accuracy in diagnosing molten pool size using visual methods, the strong light generated by high temperatures causing damage to the eyesight of monitoring personnel, low practicality, and certain safety hazards. It also solves the problem that image analysis methods can only obtain images of the molten pool from specific angles, making it impossible to understand the overall picture of the molten pool and easily leading to misjudgment of the molten pool size.

[0019] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in this invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a flowchart illustrating a method for determining the size of the molten pool in an evaporation boat according to Embodiment 1 of the present invention;

[0022] Figure 2 This is a flowchart illustrating another method for determining the size of the molten pool in an evaporation boat, as provided in Embodiment 2 of the present invention.

[0023] Figure 3 This is a flowchart illustrating another method for determining the size of the molten pool in an evaporation boat, provided in Embodiment 3 of the present invention.

[0024] Figure 4 This is a schematic diagram of the structure of a device for determining the size of the molten pool in an evaporation boat, provided in Embodiment 4 of the present invention;

[0025] Figure 5This is a schematic diagram of the structure of an electronic device provided in Embodiment 5 of the present invention. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort should fall within the scope of protection of the present invention.

[0027] It should be noted that the terms "first," "second," "initial," "intermediate," "candidate," "alternate," "target," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0028] PVD vacuum coating is currently the main production method for aluminum / copper composite current collectors. Molten pool adjustment is the primary means of controlling the film quality during PVD vacuum coating. An unsuitable molten pool size can lead to uneven molten metal thickness and increased local temperature gradients, resulting in metal droplet splashing. This splashing not only affects the appearance and performance of lithium-ion battery current collectors but also hinders production volume and the user experience. Existing methods for determining molten pool size include: 1) Visually determining the molten pool size through an observation window, but the high temperature and intense light generated during coating can cause irreversible damage to the observer's eyesight, making prolonged observation impossible. 2) Collecting molten pool images through specific observation channels to determine the size, but the specific angle prevents the observer from seeing the entire molten pool, easily leading to misjudgment and limited diagnostic accuracy. 3) Determining the relative size of the molten pool based on logging data (LOG), but the intuitive current data is greatly affected by the evaporation boat resistance and the circuit input voltage, making it difficult to accurately correlate with the molten pool size, thus limiting diagnostic accuracy.

[0029] Example 1:

[0030] Figure 1 This is a flowchart illustrating a method for determining the molten pool size of an evaporation boat according to Embodiment 1 of the present invention. This embodiment is applicable to the intuitive, accurate, simple, and efficient calculation of the electrode exothermic factor of an evaporation boat, and then determines the molten pool size of the evaporation boat based on the quantified electrode exothermic factor value. Specifically, it can be used to determine the relative relationship between the actual molten pool size and the standard molten pool size of a single evaporation boat, as well as the relative relationship between the molten pool sizes of multiple evaporation boats. This method can be executed by the device for determining the molten pool size of an evaporation boat provided by the present invention. This device can be implemented in hardware and / or software. In a specific embodiment, the device can be integrated into an electronic device. The following embodiments will be described using the integration of this device into an electronic device as an example. Figure 1 The method specifically includes the following steps:

[0031] S101. Determine the dry-burning voltage and dry-burning current of the evaporation boat.

[0032] The dry-burning voltage and current of the evaporation boat refer to the voltage and current data of the evaporation boat under dry-burning conditions. Dry-burning refers to the continuous heating of the evaporation boat without any vapor deposition material (e.g., aluminum wire, copper wire, etc.) or with insufficient vapor deposition material, resulting in excessively high surface temperature and localized overheating. In this invention, the dry-burning voltage and current refer to the momentary high voltage and momentary low current values ​​in the evaporation boat circuit when no vapor deposition material is supplied and the evaporation boat is heated, causing localized overheating. From the equipment perspective, the dry-burning voltage and current of the evaporation boat can also be understood as the voltage across the evaporation boat body and the current flowing through the evaporation boat body under no-load or near-no-load conditions. The specific values ​​of the dry-burning voltage and current are related to the power supply voltage limit, power supply current limit, and the high-temperature resistance of the boat body; this invention does not limit these values. Generally, the dry-burning voltage of the evaporation boat can be 7-8V, and the dry-burning current can be 400-700A.

[0033] S102. Obtain the wire feeding parameters of the evaporation boat and feed the metal wire to the evaporation boat according to the wire feeding parameters.

[0034] The metal wire (i.e., the vapor deposition material) fed into the evaporation boat melts under the heat generated by the evaporation boat, forming an evaporation boat containing a molten pool. Due to the inherent resistance of the boat body, the evaporation boat generates Joule heating when current flows through the conductive boat body, producing heat that can be used to heat or even melt the metal wire fed into the evaporation boat. Specifically, when the metal wire is heated above its melting point inside the evaporation boat, it melts into droplets (equivalent to entering a molten state), forming an evaporation boat containing a molten pool. The wire feeding parameters of the evaporation boat can be understood as the control information for the delivery of the vapor deposition material, such as the type of vapor deposition material, wire feeding speed, and film thickness in meters.

[0035] For example, assuming the evaporation material is aluminum wire, the wire feeding speed is 500 mm / min, and the film travel distance is 4000 m, then the aluminum wire is fed to the evaporation boat at a speed of 500 mm / min and a film travel distance of 4000 m. The purpose of this setting is to accurately feed the metal wire to the evaporation boat according to the wire feeding parameters.

[0036] S103. Determine the molten pool voltage and molten pool current of the evaporation boat containing the molten pool, and calculate the electrode heat release factor of the evaporation boat based on the dry burning voltage, dry burning current, molten pool voltage and molten pool current.

[0037] In this context, the molten pool voltage and current of the evaporation boat containing the molten pool can be understood as the actual measured voltage values ​​at both ends of the evaporation boat and the current values ​​flowing through the evaporation boat when a stable liquid metal molten pool forms on the surface of the evaporation boat. The molten pool voltage and current essentially represent the operating point of the evaporation boat during normal full-load evaporation. The term "molten pool" emphasizes that the evaporation boat is in a process state where the molten metal is completely wetted and evaporation is most stable. The electrode heat release ratio factor of the evaporation boat represents the proportion of the heat release increment of the electrode portion of the evaporation boat in the total heat release increment compared to the dry-burning state. There is a certain correlation between the electrode heat release ratio factor of the evaporation boat and the molten pool size; therefore, the electrode heat release ratio factor of the evaporation boat can be used to determine the molten pool size. The electrode heat release ratio factor of this invention can be correlated with molten pool size information, effectively avoiding the problem that "current data is greatly affected by the resistance of the evaporation boat and the input voltage of the circuit, making it impossible to accurately correlate with the molten pool size, and the diagnostic accuracy of the molten pool size is limited."

[0038] Specifically, the electrode heat release factor of the evaporation boat is calculated based on the dry-burning voltage, dry-burning current, molten pool voltage, and molten pool current. This includes: determining the equivalent current of the evaporation boat based on the dry-burning voltage, molten pool voltage, and molten pool current; and determining the electrode heat release factor of the evaporation boat based on the equivalent current, dry-burning voltage, and dry-burning current.

[0039] The equivalent current of the evaporation boat can be understood as the equivalent series current value obtained by converting the multi-segment heating structure of the evaporation boat body. For example, it is a virtual series current value obtained by equivalent conversion of heating elements with different cross-sectional areas and temperatures. The purpose of introducing the equivalent current in this invention is to eliminate the influence of the evaporation boat resistance and the input voltage of the evaporation boat circuit on the molten pool state, improve the accuracy of molten pool size determination, and the high-precision molten pool size determination can assist process engineers in controlling the evaporation boat molten pool and improving the film formation quality of PVD vacuum deposition.

[0040] On the one hand, the formula for calculating the equivalent current of the evaporation boat is: I d =I1×U0 / U1; where I dLet I1 represent the molten pool current, U0 represent the dry-burning voltage, and U1 represent the molten pool voltage. For example, assuming the dry-burning voltage of evaporation boat 1 is 7.3V, the molten pool current of evaporation boat 1 containing the molten pool is 600A, and the molten pool voltage is 6.7V, then the equivalent current of evaporation boat 1 is 600×7.3 / 6.7=653.73A.

[0041] On the other hand, the formula for calculating the electrode heat release factor of the evaporation boat is: E=[U0×I0×(I d 2 -I0 2 )] / [I0 2 ×(U0×I d -U0×I0]; where E represents the electrode heat release rate factor, I d I0 represents the equivalent current, U0 represents the dry-burning current, and U0 represents the dry-burning voltage.

[0042] For example, assuming the dry-burning current of evaporator boat 1 is 500A, the dry-burning voltage is 7.3V, and the equivalent current is 653.73A, then the electrode heat release rate factor of evaporator boat 1 is [7.3×500×(653.73A). 2 -500 2 )] / [500 2 ×(7.3×653.73-7.3×500]=2.31. The advantage of this setting is that the electrode heat release factor of the evaporation boat can be calculated based on the dry burning voltage, dry burning current, molten pool voltage and molten pool current of the evaporation boat, and the criteria for determining the molten pool size of the evaporation boat can be quantified.

[0043] The technical solution of the above embodiment calculates the electrode heat release factor of the evaporation boat based on the dry-burning voltage and current of the evaporation boat in the dry-burning state, and the molten pool voltage and current of the evaporation boat containing the molten pool after it enters the molten state. This allows for a simple, safe, fast, and accurate determination of the molten pool size of the evaporation boat using quantitative values. This solves the problems of limited efficiency and accuracy in molten pool size diagnosis using visual methods, the damage to the eyesight of monitoring personnel caused by the intense light generated at high temperatures, low practicality, and certain safety hazards. It also addresses the problem that image analysis methods can only obtain molten pool images from specific angles, failing to provide a complete view of the molten pool and easily leading to misjudgments of its size.

[0044] Example 2:

[0045] Figure 2 This is a flowchart illustrating another method for determining the molten pool size of an evaporation boat according to Embodiment 2 of the present invention. Based on the above embodiments, this embodiment provides a preferred method for comparing the relative sizes of individual evaporation boats with more complete process details. Specifically, as shown... Figure 2 As shown, the method includes:

[0046] S201. Determine the dry-burning voltage and dry-burning current of the evaporation boat.

[0047] S202. Obtain the wire feeding parameters of the evaporation boat and feed the metal wire to the evaporation boat according to the wire feeding parameters.

[0048] The metal wire fed into the evaporation boat melts under the heat generated by the evaporation boat, forming an evaporation boat containing a molten pool.

[0049] S203. Determine the molten pool voltage and molten pool current of the evaporation boat containing the molten pool, and calculate the electrode heat release factor of the evaporation boat based on the dry burning voltage, dry burning current, molten pool voltage and molten pool current.

[0050] Among them, the electrode exothermic factor of the evaporation boat is used to determine the molten pool size of the evaporation boat.

[0051] The implementation principle of S201-S203 in this embodiment is the same as that of S101-S103 in Embodiment 1, and will not be described again here.

[0052] S204. Obtain the reference electrode heat release factor of the evaporation boat under the wire feeding parameters.

[0053] The reference electrode heat release ratio factor can be understood as the electrode heat release ratio factor corresponding to the reference molten pool generated by the evaporation boat under the wire feeding parameters. The reference molten pool can be a molten pool that spreads 80% of the evaporation boat along the length direction, 60% of the evaporation boat along the width direction, and has a thickness of 1 mm. The proportions in the length direction, the proportions in the width direction, and the thickness can be set and adjusted according to the usage requirements of the reference molten pool. This invention does not limit this.

[0054] This invention allows for advance measurements of different types of evaporation boats to obtain the reference electrode heat dissipation factor for each evaporation boat under different wire feeding parameters. This enables rapid comparison of the molten pool size of a single evaporation boat through information matching. It is worth noting that, under the reference molten pool condition, the reference electrode heat dissipation factor is only related to the wire feeding speed and not to the film travel distance. Table 1 shows the reference electrode heat dissipation factor and related parameters of evaporation boat 1 under different wire feeding speeds.

[0055] Table 1

[0056]

[0057] The purpose of this setup is to quickly determine the reference electrode exothermic factor of the evaporation boat by looking up a table after determining the wire feeding parameters. It is worth noting that for the same evaporation boat, the closer the actual electrode exothermic factor is to the reference electrode exothermic factor, the better it is for maintaining a good molten pool state. Based on the actual electrode exothermic factor and the reference electrode exothermic factor, the current performance of the molten pool in the evaporation boat can be determined, assisting process engineers in controlling the molten pool and improving the film quality of PVD vacuum deposition.

[0058] S205. Based on the electrode exothermic rate factor, the reference electrode exothermic rate factor, and the correlation between the electrode exothermic rate factor and the molten pool size, determine the relative size relationship between the current molten pool and the reference molten pool of the evaporation boat.

[0059] Among them, the reference electrode heat release factor corresponds to the reference molten pool of the evaporation boat, the electrode heat release factor corresponds to the current molten pool of the evaporation boat, and the electrode heat release factor is negatively correlated with the molten pool size. That is, the larger the electrode heat release factor, the smaller the molten pool size of the evaporation boat, and the smaller the electrode heat release factor, the larger the molten pool size of the evaporation boat.

[0060] Based on the electrode exothermic rate factor, the reference electrode exothermic rate factor, and the correlation between the electrode exothermic rate factor and the molten pool size, the relative size relationship between the current molten pool and the reference molten pool of the evaporation boat is determined, including: when the electrode exothermic rate factor is equal to the reference electrode exothermic rate factor, the current molten pool of the evaporation boat and the reference molten pool are determined to have the same size; when the electrode exothermic rate factor is greater than the reference electrode exothermic rate factor, the current molten pool size of the evaporation boat is determined to be smaller than the reference molten pool size of the evaporation boat; when the electrode exothermic rate factor is less than the reference electrode exothermic rate factor, the current molten pool size of the evaporation boat is determined to be larger than the reference molten pool size of the evaporation boat.

[0061] For example, as shown in Table 1, the reference electrode heat dissipation factor of evaporation boat 1 at a wire feed speed of 500 mm / min is 2.19. If the electrode heat dissipation factor of evaporation boat 1 at a wire feed speed of 500 mm / min is 2.15 (2.15 < 2.19), then the current molten pool size of evaporation boat 1 is determined to be larger than the reference molten pool size of evaporation boat 1. If the electrode heat dissipation factor of evaporation boat 1 at a wire feed speed of 500 mm / min is 2.25 (2.25 > 2.19), then the current molten pool size of evaporation boat 1 is determined to be smaller than the reference molten pool size of evaporation boat 1. If the electrode heat dissipation factor of evaporation boat 1 at a wire feed speed of 500 mm / min is 2.19, then the current molten pool size of evaporation boat 1 is determined to be equal to the reference molten pool size of evaporation boat 1. The advantage of this setting is that the comparison conclusion of the molten pool size of evaporation boat can be accurately obtained through quantitative values, thereby guiding process engineers to control the molten pool of evaporation boat and improve the film formation quality of PVD vacuum deposition.

[0062] The technical solution of the above embodiments provides a method for comparing the molten pool state of a single evaporation boat. By using the heat release factor of the reference electrode and taking the reference molten pool as a measurement index, the relative size and performance of the current molten pool are determined in a refined manner.

[0063] Example 3:

[0064] Figure 3 This is a flowchart illustrating another method for determining the molten pool size of an evaporation boat according to Embodiment 3 of the present invention. Based on the above embodiments, this embodiment provides a preferred method for comparing the relative sizes of multiple evaporation boats with more complete process details. Specifically, as shown... Figure 3 As shown, the method includes:

[0065] S301. Determine the dry-burning voltage and dry-burning current of the evaporation boat.

[0066] S302. Obtain the wire feeding parameters of the evaporation boat and feed the metal wire to the evaporation boat according to the wire feeding parameters.

[0067] The metal wire fed into the evaporation boat melts under the heat generated by the evaporation boat, forming an evaporation boat containing a molten pool.

[0068] S303. Determine the molten pool voltage and molten pool current of the evaporation boat containing the molten pool, and calculate the electrode heat release factor of the evaporation boat based on the dry burning voltage, dry burning current, molten pool voltage and molten pool current.

[0069] Among them, the electrode exothermic factor of the evaporation boat is used to determine the molten pool size of the evaporation boat.

[0070] Similarly, the implementation principle of S301-S303 in this embodiment is the same as that of S101-S103 in Embodiment 1, and will not be described in detail here.

[0071] S304. Statistically analyze the evaporation boat and the associated evaporation boat to obtain at least two evaporation boats to be compared, and determine the electrode heat release factor of at least two evaporation boats to be compared.

[0072] In this context, the associated evaporating boats can be understood as evaporating boats whose molten pool size needs to be compared with the current evaporating boat. The current evaporating boat is the evaporating boat represented in S301-S303, and the evaporating boats to be compared are the evaporating boat and the associated evaporating boats. Assuming the evaporating boat represented in S301-S303 is evaporating boat 1, and evaporating boats 2 and 3 both need to be compared with evaporating boat 1 in terms of molten pool size, then evaporating boats 2 and 3 are associated evaporating boats of evaporating boat 1, and at least two evaporating boats to be compared are a set consisting of evaporating boat 2, evaporating boat 3, and evaporating boat 1. The method for determining the electrode heat dissipation rate factor of evaporating boats 2 and 3 is the same as that of evaporating boat 1, and this invention does not limit this. It is worth noting that when determining the electrode heat dissipation rate factor of the evaporating boats, the wire feeding parameters of each evaporating boat to be compared need to be consistent.

[0073] S305. Based on the correlation between the electrode exothermic ratio factor and the molten pool size, and the electrode exothermic ratio factors of at least two evaporation boats to be compared, determine the relative size relationship of the molten pool sizes of at least two evaporation boats to be compared.

[0074] The electrode exothermic factor is negatively correlated with the molten pool size. Specifically, based on the correlation between the electrode exothermic factor and the molten pool size, and the electrode exothermic factors of at least two evaporation boats to be compared, the relative size relationship of the molten pool sizes of at least two evaporation boats to be compared is determined. This includes: ranking the electrode exothermic factors of at least two evaporation boats to be compared in ascending order of parameter values, and determining that the relative size relationship of the molten pool sizes of at least two evaporation boats to be compared is that the molten pool size decreases with the ranking result; or, ranking the electrode exothermic factors of at least two evaporation boats to be compared in descending order of parameter values, and determining that the relative size relationship of the molten pool sizes of at least two evaporation boats to be compared is that the molten pool size increases with the ranking result.

[0075] The present invention can be illustrated with specific examples to illustrate the process of determining the relative size relationship of the molten pool in the evaporation boat, as shown in the following examples:

[0076] Example 1: Assume the wire feeding parameters are a wire feeding speed of 500 mm / min and a film length of 4000 m. The dry-burning voltage of evaporation boat 1 in dry-burning mode is 7.3 V, and the dry-burning current is 500 A. The dry-burning voltage of evaporation boat 2 in dry-burning mode is 7.5 V, and the dry-burning current is 540 A. The dry-burning voltage of evaporation boat 3 in dry-burning mode is 7.4 V, and the dry-burning current is 540 A. The molten pool voltage of evaporation boat 1 at a wire feeding speed of 500 mm / min and a film length of 4000 m is 6.7 V, and the molten pool current is 600 A. The molten pool voltage of evaporation boat 2 at a wire feeding speed of 500 mm / min and a film length of 4000 m is 6.8 V, and the molten pool current is 630 A. The molten pool voltage of evaporation boat 3 at a wire feeding speed of 500 mm / min and a film length of 4000 m is 6.7 V, and the molten pool current is 650 A. Using the formulas "Equivalent current = Molten pool current × Dry burning voltage / Molten pool voltage" and "Electrode heat release factor = [Dry burning voltage × Dry burning current × (Equivalent current)]", 2 - Dry burning current 2 )] / [Dry burning current 2 The electrode heat release factor of evaporation boats 1, 2, and 3 can be calculated by multiplying the coefficient by (dry-burning voltage × equivalent current - dry-burning voltage × dry-burning current) by (×(dry-burning voltage × equivalent current) - dry-burning voltage × dry-burning current)). Specifically, the calculated electrode heat release factor of evaporation boat 1 is 2.31, that of evaporation boat 2 is 2.28, and that of evaporation boat 3 is 2.33. Based on the negative correlation between the electrode heat release factor and the molten pool size, the relative sizes of the molten pools are: molten pool size of evaporation boat 3 < molten pool size of evaporation boat 1 < molten pool size of evaporation boat 2.

[0077] Example 2: Assume the wire feeding parameters are a wire feeding speed of 500 mm / min and a film length of 4000 m. The dry-burning voltage of evaporation boat 1 in dry-burning mode is 7.3 V and the dry-burning current is 500 A; the dry-burning voltage of evaporation boat 2 in dry-burning mode is 7.5 V and the dry-burning current is 540 A; the dry-burning voltage of evaporation boat 3 in dry-burning mode is 7.4 V and the dry-burning current is 540 A. The molten pool voltage of evaporation boat 1 at a wire feeding speed of 500 mm / min and a film length of 4000 m is 7.15 V and the molten pool current is 590 A; the molten pool voltage of evaporation boat 2 at a wire feeding speed of 500 mm / min and a film length of 4000 m is 7.35 V and the molten pool current is 610 A; and the molten pool voltage of evaporation boat 3 at a wire feeding speed of 500 mm / min and a film length of 4000 m is 7.25 V and the molten pool current is 650 A. Similarly, using the formulas "equivalent current = molten pool current × dry burning voltage / molten pool voltage" and "electrode heat release factor = [dry burning voltage × dry burning current × (equivalent current)]", 2 - Dry burning current 2 )] / [Dry burning current 2The electrode heat release factor of evaporation boats 1, 2, and 3 can be calculated by multiplying the coefficient by (dry-burning voltage × equivalent current - dry-burning voltage × dry-burning current) by (×(dry-burning voltage × equivalent current) - dry-burning voltage × dry-burning current)). Specifically, the calculated electrode heat release factor of evaporation boat 1 is 2.20, that of evaporation boat 2 is 2.15, and that of evaporation boat 3 is 2.23. Based on the negative correlation between the electrode heat release factor and the molten pool size, the relative sizes of the molten pools are: molten pool size of evaporation boat 3 < molten pool size of evaporation boat 1 < molten pool size of evaporation boat 2.

[0078] Example 3: Assume the wire feeding parameters are a wire feeding speed of 800 mm / min and a film length of 6000 m. The dry-burning voltage of evaporation boat 1 in dry-burning mode is 7.8 V, and the dry-burning current is 630 A. The dry-burning voltage of evaporation boat 2 in dry-burning mode is 7.7 V, and the dry-burning current is 600 A. The dry-burning voltage of evaporation boat 3 in dry-burning mode is 7.7 V, and the dry-burning current is 650 A. The molten pool voltage of evaporation boat 1 at a wire feeding speed of 800 mm / min and a film length of 6000 m is 7 V, and the molten pool current is 720 A. The molten pool voltage of evaporation boat 2 at a wire feeding speed of 800 mm / min and a film length of 6000 m is 6.9 V, and the molten pool current is 700 A. The molten pool voltage of evaporation boat 3 at a wire feeding speed of 800 mm / min and a film length of 6000 m is 6.8 V, and the molten pool current is 800 A. Similarly, using the formulas "equivalent current = molten pool current × dry burning voltage / molten pool voltage" and "electrode heat release factor = [dry burning voltage × dry burning current × (equivalent current)]", 2 - Dry burning current 2 )] / [Dry burning current 2 The electrode heat release factor of evaporation boats 1, 2, and 3 can be calculated by multiplying the coefficient by (dry-burning voltage × equivalent current - dry-burning voltage × dry-burning current) by (×(dry-burning voltage × equivalent current) - dry-burning voltage × dry-burning current)). Specifically, the calculated electrode heat release factor of evaporation boat 1 is 2.27, that of evaporation boat 2 is 2.30, and that of evaporation boat 3 is 2.39. Based on the negative correlation between the electrode heat release factor and the molten pool size, the relative size of the molten pools is: molten pool size of evaporation boat 3 < molten pool size of evaporation boat 2 < molten pool size of evaporation boat 1.

[0079] The technical solution of the above embodiment provides a method for comparing the molten pool size (i.e., molten pool area) of multiple evaporation boats, which can determine the relative size of the molten pool of each evaporation boat based on the value of the electrode exothermic factor of each evaporation boat under the same wire feeding parameters.

[0080] Example 4:

[0081] Figure 4 This is a schematic diagram of a device for determining the size of the molten pool in an evaporation boat, provided in Embodiment 4 of the present invention. Figure 4As shown, the device includes: a parameter determination module 401, a wire feeding control module 402, and a factor calculation module 403.

[0082] The parameter determination module 401 is used to determine the dry-burning voltage and dry-burning current of the evaporation boat.

[0083] The wire feeding control module 402 is used to acquire the wire feeding parameters of the evaporation boat and feed the metal wire to the evaporation boat according to the wire feeding parameters. The metal wire fed into the evaporation boat enters the molten state under the action of the heat generated by the evaporation boat, forming an evaporation boat containing a molten pool.

[0084] The factor calculation module 403 is used to determine the molten pool voltage and molten pool current of the evaporation boat containing the molten pool, and to calculate the electrode heat release factor of the evaporation boat based on the dry burning voltage, dry burning current, molten pool voltage and molten pool current; wherein, the electrode heat release factor of the evaporation boat is used to determine the molten pool size of the evaporation boat.

[0085] Optionally, the factor calculation module 403 is specifically used to: determine the equivalent current of the evaporation boat based on the dry burning voltage, the molten pool voltage, and the molten pool current; and determine the electrode heat release factor of the evaporation boat based on the equivalent current, the dry burning voltage, and the dry burning current.

[0086] Optionally, the formula for calculating the equivalent current of the evaporation boat is: I d =I1×U0 / U1; where I d I1 represents the molten pool current, U0 represents the dry-burning voltage, and U1 represents the molten pool voltage.

[0087] Optionally, the electrode heat release rate factor of the evaporation boat represents the proportion of the heat release increment of the electrode section of the evaporation boat in the total heat release increment compared to the dry-burning state. Accordingly, the formula for calculating the electrode heat release rate factor of the evaporation boat is: E=[U0×I0×(I d 2 -I0 2 )] / [I0 2 ×(U0×I d -U0×I0]; where E represents the electrode heat release rate factor, I d I0 represents the equivalent current, U0 represents the dry-burning current, and U0 represents the dry-burning voltage.

[0088] Optionally, the apparatus for determining the size of the molten pool in the evaporation boat further includes a molten pool comparison module. This module is used to obtain a reference electrode heat dissipation factor of the evaporation boat under wire feeding parameters after calculating the electrode heat dissipation factor of the evaporation boat. Based on the electrode heat dissipation factor, the reference electrode heat dissipation factor, and the correlation between the electrode heat dissipation factor and the molten pool size, the module determines the relative size relationship between the current molten pool and the reference molten pool of the evaporation boat. The reference electrode heat dissipation factor corresponds to the reference molten pool of the evaporation boat, and the electrode heat dissipation factor corresponds to the current molten pool of the evaporation boat.

[0089] Optionally, the electrode exothermic rate factor is negatively correlated with the molten pool size. The molten pool comparison module is specifically used to: determine that the current molten pool size of the evaporation boat is the same as the reference molten pool size when the electrode exothermic rate factor is equal to the reference electrode exothermic rate factor; determine that the current molten pool size of the evaporation boat is smaller than the reference molten pool size of the evaporation boat when the electrode exothermic rate factor is greater than the reference electrode exothermic rate factor; and determine that the current molten pool size of the evaporation boat is larger than the reference molten pool size of the evaporation boat when the electrode exothermic rate factor is less than the reference electrode exothermic rate factor.

[0090] Optionally, the molten pool comparison module is also used to: after calculating the electrode exothermic factor of the evaporation boat, to perform statistics on the evaporation boat and the associated evaporation boats to obtain at least two evaporation boats to be compared, and to determine the electrode exothermic factor of at least two evaporation boats to be compared; and to determine the relative size relationship of the molten pools of at least two evaporation boats to be compared based on the correlation between the electrode exothermic factor and the molten pool size and the electrode exothermic factors of at least two evaporation boats to be compared.

[0091] Optionally, the molten pool comparison module is specifically used to: sort the electrode exothermic factor of at least two evaporation boats to be compared in ascending order of parameter values, and determine that the relative size relationship of the molten pool size of at least two evaporation boats to be compared is such that the molten pool size decreases with the sorting result; or, sort the electrode exothermic factor of at least two evaporation boats to be compared in descending order of parameter values, and determine that the relative size relationship of the molten pool size of at least two evaporation boats to be compared is such that the molten pool size increases with the sorting result.

[0092] The apparatus for determining the size of the evaporator boat molten pool provided in this embodiment can execute the method for determining the size of the evaporator boat molten pool provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects for executing the method.

[0093] Example 5:

[0094] Figure 5This is a schematic diagram of the structure of an electronic device provided in Embodiment 5 of the present invention. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (such as helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0095] like Figure 5 As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the read-only memory 12 or loaded from the storage unit 18 into the RAM 13. The RAM 13 can also store various programs and data required for the operation of the electronic device 10. The processor 11, read-only memory 12, and RAM 13 are interconnected via a bus 14. An input / output interface 15 is also connected to the bus 14.

[0096] Multiple components in electronic device 10 are connected to input / output interface 15, including: input unit 16, such as keyboard, mouse, etc.; output unit 17, such as various types of monitors, speakers, etc.; storage unit 18, such as disk, optical disk, etc.; and communication unit 19, such as network card, modem, wireless transceiver, etc. Communication unit 19 allows electronic device 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0097] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, central processing units, graphics processing units, various special-purpose artificial intelligence computing chips, various processors running machine learning model algorithms, digital signal processors, and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as methods for determining the molten pool size of the evaporation boat.

[0098] In some embodiments, the method for determining the evaporator boat molten pool size may be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or mounted on electronic device 10 via read-only memory 12 and / or communication unit 19. When the computer program is loaded into random access memory 13 and executed by processor 11, one or more steps of the method for determining the evaporator boat molten pool size described above may be performed. Alternatively, in other embodiments, processor 11 may be configured by any other suitable means (e.g., by means of firmware) to perform the method for determining the evaporator boat molten pool size.

[0099] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays, application-specific integrated circuits (ASICs), application-specific standard products (ASICs), systems-on-a-chip (SoCs), payload programmable logic devices, computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0100] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0101] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory, read-only memory, erasable programmable read-only memory / flash memory, optical fibers, portable compact disk read-only memory, optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0102] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a cathode ray tube or liquid crystal display) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (voice input and / or tactile input).

[0103] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), middleware components (e.g., application servers), or frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0104] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a host product within the cloud computing service system to address the shortcomings of traditional physical hosts and virtual private servers, such as high management difficulty and weak business scalability.

[0105] In one specific embodiment, the present invention also includes a computer program product comprising a computer program that, when executed by a processor, implements the method for determining the molten pool size of an evaporator boat according to any embodiment of the present invention.

[0106] In the implementation of a computer program product, computer program code for performing the operations of this invention can be written in one or more programming languages ​​or a combination thereof. Programming languages ​​include object-oriented programming languages ​​as well as conventional procedural programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including local area networks (LANs) or wide area networks (WANs), or it can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0107] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0108] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A method for determining the size of the molten pool in an evaporation boat, characterized in that, include: Determine the dry-burning voltage and dry-burning current of the evaporation boat; Obtain the wire feeding parameters of the evaporation boat, and feed the metal wire into the evaporation boat according to the wire feeding parameters. The metal wire fed into the evaporation boat enters the molten state under the action of the heat generated by the evaporation boat, forming an evaporation boat containing a molten pool. The molten pool voltage and molten pool current of the evaporation boat containing the molten pool are determined, and the electrode heat release factor of the evaporation boat is calculated based on the dry burning voltage, the dry burning current, the molten pool voltage, and the molten pool current; wherein, the electrode heat release factor of the evaporation boat is used to determine the molten pool size of the evaporation boat.

2. The method according to claim 1, characterized in that, The step of calculating the electrode heat release factor of the evaporation boat based on the dry-burning voltage, the dry-burning current, the molten pool voltage, and the molten pool current includes: The equivalent current of the evaporation boat is determined based on the dry burning voltage, the molten pool voltage, and the molten pool current. The electrode heat release factor of the evaporation boat is determined based on the equivalent current, the dry-burning voltage, and the dry-burning current.

3. The method according to claim 2, characterized in that, The formula for calculating the equivalent current of the evaporation boat is: I d =I1×U0 / U1; where I d I1 represents the equivalent current, U0 represents the molten pool current, and U1 represents the dry burning voltage.

4. The method according to claim 2, characterized in that, The electrode heat release factor of the evaporation boat represents the proportion of the heat release increment of the electrode part of the evaporation boat in the total heat release increment in the molten state compared with the dry burning state. Accordingly, the formula for calculating the electrode heat release rate factor of the evaporation boat is: E=[U0×I0×(I d 2 -I0 2 )] / [I0 2 ×(U0×I d -U0×I0]; where E represents the heat release rate factor of the electrode, I d I0 represents the equivalent current, U0 represents the dry-burning current, and U0 represents the dry-burning voltage.

5. The method according to claim 1, characterized in that, After calculating the electrode exothermic factor of the evaporation boat, the method further includes: Obtain the reference electrode heat release factor of the evaporation boat under the wire feeding parameters; Based on the electrode exothermic ratio factor, the reference electrode exothermic ratio factor, and the correlation between the electrode exothermic ratio factor and the molten pool size, the relative size relationship between the current molten pool and the reference molten pool of the evaporation boat is determined; wherein, the reference electrode exothermic ratio factor corresponds to the reference molten pool of the evaporation boat, and the electrode exothermic ratio factor corresponds to the current molten pool of the evaporation boat.

6. The method according to claim 5, characterized in that, The electrode exothermic rate factor is negatively correlated with the molten pool size; Accordingly, determining the relative size relationship between the current molten pool and the reference molten pool of the evaporation boat based on the electrode exothermic rate factor, the reference electrode exothermic rate factor, and the correlation between the electrode exothermic rate factor and the molten pool size includes: When the electrode heat release factor is equal to the reference electrode heat release factor, it is determined that the current molten pool of the evaporation boat has the same molten pool size as the reference molten pool. When the electrode heat release factor is greater than the reference electrode heat release factor, it is determined that the current molten pool size of the evaporation boat is smaller than the reference molten pool size of the evaporation boat. When the electrode exothermic factor is less than the reference electrode exothermic factor, it is determined that the current molten pool size of the evaporation boat is greater than the reference molten pool size of the evaporation boat.

7. The method according to claim 1, characterized in that, After calculating the electrode exothermic factor of the evaporation boat, the method further includes: The evaporation boat and its associated evaporation boats are statistically analyzed to obtain at least two evaporation boats to be compared, and the electrode heat release factor of the at least two evaporation boats to be compared is determined. Based on the correlation between the electrode exothermic ratio factor and the molten pool size, and the electrode exothermic ratio factors of the at least two evaporation boats to be compared, the relative size relationship of the molten pool sizes of the at least two evaporation boats to be compared is determined.

8. The method according to claim 7, characterized in that, The electrode exothermic rate factor is negatively correlated with the molten pool size; Accordingly, determining the relative size relationship of the molten pool sizes of the at least two evaporation boats to be compared, based on the correlation between the electrode exothermic ratio factor and the molten pool size and the electrode exothermic ratio factors of the at least two evaporation boats to be compared, includes: The electrode exothermic factor of the at least two evaporation boats to be compared is sorted in ascending order of parameter value, and the relative size relationship of the molten pool size of the at least two evaporation boats to be compared is determined to be that the molten pool size decreases with the sorting result. or, The electrode exothermic factor of the at least two evaporation boats to be compared is sorted in descending order of parameter value, and the relative size relationship of the molten pool size of the at least two evaporation boats to be compared is determined to be that the molten pool size increases with the sorting result.

9. An electronic device, characterized in that, The electronic device includes: At least one processor; and a memory communicatively connected to said at least one processor; The memory stores a computer program executable by the at least one processor, which is executed by the at least one processor to enable the at least one processor to perform the method for determining the size of the evaporation boat molten pool as described in any one of claims 1 to 8.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed by a processor, implement the method for determining the size of the evaporation boat molten pool as described in any one of claims 1 to 8.

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