Crucible melting electrode control method

Abstract

The invention provides a crucible melting electrode control method, and belongs to the technical field of crucible manufacturing. Comprising the steps that when an electrode begins to discharge arc, a CCD device is controlled to take a picture, the CCD device is arranged on one side of a crucible mold, and the setting height is between a water cooling plate and an outer water jacket; images, including the electrode, the lower edge of the water cooling plate and the upper edge of the outer water jacket, shot by the CCD device are obtained; and according to the image, a predetermined calculation formula and set parameters, the position and the opening and closing size of the electrode are adjusted in real time. The CCD device is used for replacing human eyes to observe and adjust the electrode in the melting process of the crucible, the opening and closing size of the electrode after arcing and the position of the electrode are automatically controlled in real time and accurately according to set parameters, the requirement for producing the crucible is met, manual intervention is not needed, and the labor cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of crucible manufacturing, and in particular to a crucible melting electrode control method. Background Art

[0002] At present, quartz crucibles are mainly melted by high-temperature electric arc method. In the production process of quartz crucibles, the melting process is a key step in the quality of crucible production. The method of melting the crucible is that before melting, a certain proportion of high-purity quartz sand needs to be put into the inner surface of the crucible mold, and the crucible mold is artificially formed by the centrifugal force of the crucible mold and the forming rod. Then the equipment moves the crucible mold with the formed quartz sand to the position of the electrode rod. In the current process, the number of electrodes is 3. When melting the crucible, the electrode is connected to the arc to form a high temperature to melt the quartz sand. At the same time, the electrode descends to the position of the crucible mold port according to the process parameters to form a crucible-shaped quartz material. When the process is completed, it is taken out after cooling to complete the production of a quartz crucible blank.

[0003] During the melting process, the electrode plays a key role. The size of the electrode opening and closing and the position of the electrode will affect the size and thickness of the melting crucible, and determine the success of the melting crucible. The traditional melting process will give a parameter table to specify the size of the melting current, time, the size of the electrode opening and closing, and the position of the electrode. Because the size of the electrode opening and closing and the position of the electrode will affect the size of the crucible, the current parameter table can only give a relative electrode opening and closing size and the position of the electrode. In order to make the crucible meet the size standard requirements during the melting process, employees will adjust and control these two parameters in real time. Therefore, on the one hand, the traditional melting process requires manual real-time observation and adjustment of the electrode, which consumes manpower; on the other hand, manual observation of the electrode will have deviations or errors, and the electrode cannot be accurately adjusted, which ultimately affects the size of the finished crucible. Summary of the invention

[0004] In view of this, the present invention provides a crucible melting electrode control method to solve the technical problems of manual electrode adjustment being labor-intensive and unable to accurately adjust the electrode.

[0005] The technical solution adopted by the present invention to solve its technical problem is: A crucible melting electrode control method comprises the following steps: When the electrode starts to draw an arc, a CCD device is controlled to take a picture, wherein the CCD device is arranged on one side of the crucible mold and at a height between the water cooling plate and the outer water jacket; Acquire an image including the electrode, the lower edge of the water-cooling plate, and the upper edge of the outer water jacket taken by the CCD device; The position and opening and closing size of the electrode are adjusted in real time according to the image, a predetermined calculation formula and set parameters.

[0006] Preferably, adjusting the position and opening and closing size of the electrode in real time according to the image, a predetermined calculation formula and set parameters includes: reading pixel positions of electrodes from the image; Acquiring a preset relative position of the electrode based on the set parameters; The position of the electrode is adjusted according to a predetermined electrode position calculation formula, the pixel position and the preset relative position.

[0007] Preferably, the method for determining the electrode position calculation formula includes: Obtain the actual distance Y between the lower edge of the water cooling plate and the upper edge of the outer water jacket based on the set parameters; Read the Y-direction pixel position y1 of the lower edge of the water cooling plate and the Y-direction pixel position y2 of the upper edge of the outer water jacket from the image; A first corresponding relationship between the pixel position of the image and the actual distance is obtained according to the actual distance Y, the Y direction pixel position y1 and the Y direction pixel position y2: k1=Y / (y2-y1); The electrode position calculation formula is obtained according to the first corresponding relationship.

[0008] Preferably, the electrode position calculation formula is Y3=k1*(y3-y1); wherein Y3 is the relative position of the electrode, and y3 is the pixel position of the electrode.

[0009] Preferably, the adjusting the position of the electrode according to the predetermined electrode position calculation formula, the pixel position and the preset relative position includes: Calculating the preset pixel position of the electrode according to a predetermined electrode position calculation formula and the preset relative position; The preset pixel position is compared with the pixel position, and the position of the electrode is adjusted according to the comparison result.

[0010] Preferably, adjusting the position and opening and closing size of the electrode in real time according to the image, a predetermined calculation formula and set parameters also includes: Reading the pixel boundary positions adjacent to the electrodes on both sides from the image; Acquiring preset opening and closing data of the electrode based on the set parameters; The opening and closing size of the electrode is adjusted according to a predetermined electrode opening and closing data calculation formula, the pixel point boundary position and the preset opening and closing data.

[0011] Preferably, the method for determining the electrode opening and closing data calculation formula includes: Obtaining the diameter D of the electrode based on the set parameters; Obtain pixel boundary positions X1 and X2 on both sides of the electrode in the X direction from the image; A second corresponding relationship between the pixel position of the image and the actual distance is obtained according to the diameter D and the pixel point boundary positions X1 and X2: k2=D / (X2-X1); The electrode opening and closing data calculation formula is obtained according to the second corresponding relationship.

[0012] Preferably, the electrode opening and closing data calculation formula is d=k2*(X4-X3), wherein d is the electrode spacing, and X3 and X4 are the boundary positions of the pixel points adjacent to the electrodes on both sides.

[0013] Preferably, a water-cooling partition, heat insulation and filter glass are provided on the side of the CCD device close to the crucible mold.

[0014] Preferably, when controlling the CCD device to take pictures, the aperture is adjusted so that the CCD device can clearly capture the boundary position of the electrode, the lower edge of the water cooling plate, and the upper edge of the outer water jacket.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention adopts a CCD device instead of human eyes to observe and adjust the electrodes in the crucible melting process. The opening and closing size of the electrodes and the electrode position after arcing are automatically controlled in real time and accurately through set parameters to meet the requirements of crucible production, thereby eliminating the need for manual intervention and reducing labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the melting process in a crucible.

[0017] Figure 2 The figure is a flow chart of the crucible melting electrode control method of the present invention.

[0018] Figure 3 Schematic diagram of pixel positions of a picture taken by the CCD device of the present invention.

[0019] Figure 4 This is a cross-sectional top view of the electrode head.

[0020] Figure 5 This is a picture taken by a CCD device.

[0021] In the figure: electrode 1, water cooling plate 2, quartz crucible 3, crucible mold 4, outer water jacket 5, exhaust hole 6, exhaust pipe 7, rotating device of outer water jacket 8, water cooling partition 9, heat insulation and filter glass 10, CCD device 11. DETAILED DESCRIPTION

[0022] The technical solutions and technical effects of the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings of the present invention.

[0023] Please see Figure 1 When making a crucible, three electrodes 1 are evenly and symmetrically placed on the crucible mold 4. A water-cooled plate 2 is also placed on the crucible mold 4. The water-cooled plate 2 is roughly in the shape of a ring, and the electrode 3 is placed in the middle. The function of the water-cooled plate 2 is to insulate and keep warm. Quartz sand is poured into the crucible mold 4 and evenly formed. The crucible mold 4 is installed on the outer water jacket 5. The outer water jacket 5 can be driven by a motor to rotate the rotating device 8 of the outer water jacket, and drive the crucible mold 4 to rotate. In this way, due to the effect of centrifugal force, the quartz sand will not fall due to gravity in the crucible mold, and can be well attached to the crucible mold. There are also exhaust holes 6 distributed on the crucible mold 4, and an exhaust pipe 7 is set at the bottom of the outer water jacket. In the process of melting the crucible, the crucible needs to be evacuated, and the air is extracted from the exhaust holes 6 and the exhaust pipe 7 by a vacuum pump, so as to form a transparent layer of the crucible. The CCD device 11 is disposed on one side of the crucible mold 4 and at a height between the water cooling plate 2 and the outer water jacket 5. The CCD device takes pictures of the electrode, the lower edge of the water cooling plate and the upper edge of the outer water jacket.

[0024] Please see Figure 2 , a crucible melting electrode control method, comprising the following steps: When the electrode starts to draw an arc, the CCD device is controlled to take pictures. The CCD device is arranged on one side of the crucible mold and at a height between the water cooling plate and the outer water jacket. Acquire an image including the electrode, the lower edge of the water-cooling plate, and the upper edge of the outer water jacket taken by a CCD device; The position and opening and closing size of the electrode are adjusted in real time according to the image, predetermined calculation formula and set parameters.

[0025] In the melting stage, the electrode is initially in a closed state, at which time the voltage is 0, and then the electrode opens at a set speed, the electrode begins to draw an arc, and arc light begins to be generated in the melting machine. A CCD device is used to take pictures of the electrode, the lower edge of the water-cooled plate, and the upper edge of the outer water jacket. By acquiring images of the electrode, the lower edge of the water-cooled plate, and the upper edge of the outer water jacket taken by the CCD device, and a predetermined calculation formula, the actual position of the electrode and the actual opening and closing data of the electrode are obtained using the algorithm of the visual software, and then the electrode position and opening and closing are adjusted in real time by comparing the set parameters. Therefore, the present invention uses a CCD device instead of the human eye to observe and adjust the electrode during the crucible melting process. After the arc is started, the opening and closing size of the electrode and the electrode position are automatically controlled in real time and accurately through the set parameters to meet the requirements of crucible production, thereby eliminating the need for manual intervention and reducing labor costs.

[0026] Among them, the set parameters are a melting parameter process table pre-set according to the crucible melting process. The parameters set in the table may include the distance between the lower edge of the water-cooled plate and the upper edge of the outer water jacket, the diameter of the electrode, the relative position of the electrode, and the opening and closing size of the electrode corresponding to each melting stage.

[0027] Furthermore, a water-cooled baffle 9, a heat-insulating and light-filtering glass 10 are provided on the side of the CCD device close to the crucible mold. Since the arc light is strong and high temperature is generated when the electrode is arcing, a water-cooled baffle 9, a heat-insulating and light-filtering glass 10 are designed on the side of the CCD device close to the crucible mold to play a role of partition to reduce the temperature and light intensity near the CCD device and increase the service life of the CCD device.

[0028] Furthermore, when controlling the CCD device to take pictures, it is necessary to adjust the aperture so that the CCD device can clearly capture the boundary position of the electrode, the bottom edge of the water-cooling plate and the top edge of the outer water jacket, and then adjust the position and opening and closing size of the electrode in real time according to the electrode, the bottom edge of the water-cooling plate and the top edge of the outer water jacket in the image, as well as the predetermined calculation formula and set parameters. Therefore, the pixel position information of the electrode, the bottom edge of the water-cooling plate and the top edge of the outer water jacket in the image can be accurately read through a clear image, thereby realizing precise adjustment of the position and opening and closing size of the electrode.

[0029] In the specific implementation process, the position and opening and closing size of the electrode are adjusted in real time according to the image, the predetermined calculation formula and the set parameters, including: The pixel position of the electrode is read from the image; the position of the electrode is mainly controlled by lifting and lowering to control the height of the electrode relative to the water cooling plate and the outer water jacket. Therefore, the pixel position of the electrode is read by visual software to read the relative Y-direction pixel position of the electrode in the image. Specifically, the bottom boundary of the electrode in the image is identified by visual software, and then the relative Y-direction pixel position of the boundary is read accordingly, thereby obtaining the pixel position of the electrode.

[0030] The preset relative position of the electrode is obtained based on the set parameters; wherein the preset relative position may refer to the height information or position information of the electrode relative to the lower edge of the water-cooling plate and the upper edge of the outer water jacket.

[0031] The position of the electrode is adjusted according to the predetermined electrode position calculation formula, pixel position and preset relative position. During the melting process of the crucible, the electrode should always maintain its position at the preset relative position, that is, the electrode remains unchanged relative to the lower edge of the water-cooled plate and the upper edge of the water-cooled jacket. However, during the melting process of the crucible, the electrode is continuously consumed and becomes shorter. Therefore, it is necessary to observe the position of the bottom boundary of the electrode in real time through the CCD device, that is, the pixel position of the electrode, and control the electrode to descend in real time according to the pixel position, so that the bottom position of the electrode always remains unchanged relative to the lower edge of the water-cooled plate and the upper edge of the water-cooled jacket, thereby realizing automatic control of the electrode position.

[0032] Further, adjusting the position of the electrode according to a predetermined electrode position calculation formula, the pixel position of the electrode and the preset relative position of the electrode includes: The preset pixel position of the electrode is calculated based on a predetermined electrode position calculation formula and the preset relative position of the electrode; wherein the electrode position calculation formula includes the correspondence between the actual relative position of the electrode and the pixel position of the electrode in the image, so that the preset pixel position of the electrode in the image corresponding to the preset relative position can be obtained based on the preset relative position of the electrode.

[0033] The preset pixel position is compared with the pixel position, and the position of the electrode is adjusted according to the comparison result.

[0034] From the above, it can be seen that the present invention realizes automatic control of the electrode position through a CCD device. The control principle is to read the pixel position of the electrode in the image through visual software, and then calculate the preset pixel position corresponding to the preset relative position of the electrode according to a predetermined electrode position calculation formula and the preset relative position of the electrode, and judge whether the actual pixel position of the electrode is consistent with the preset pixel position. If not, the electrode is controlled to reach the preset pixel position by lifting and lowering, thereby realizing real-time and precise adjustment of the electrode position through the CCD device.

[0035] In the specific implementation process, the method for determining the electrode position calculation formula includes: Obtain the actual distance Y between the lower edge of the water cooling plate and the upper edge of the outer water jacket based on the set parameters; Read the Y-direction pixel position y1 of the lower edge of the water cooling plate and the Y-direction pixel position y2 of the upper edge of the outer water jacket from the image; According to the actual distance Y, the pixel position y1 in the Y direction and the pixel position y2 in the Y direction, the first corresponding relationship between the pixel position of the image and the actual distance is k1=Y / (y2-y1); The electrode position calculation formula is obtained according to the first corresponding relationship.

[0036] The CCD device can capture the boundary position of the electrode, and the bottom edge of the water cooling plate and the top edge of the outer water jacket can be seen at the same time. The boundary of the bottom edge of the water cooling plate and the top edge of the outer water jacket is read in the image through the algorithm of the visual software. The spacing is defined as Y. The difference in the boundary pixel position in the Y direction corresponds to the actual distance Y between the bottom edge of the water cooling plate and the top edge of the outer water jacket. Please refer to Figure 3, the pixel positions of the boundaries of the lower edge of the water-cooling plate 2 and the upper edge of the outer water jacket 5 in the Y direction correspond to y1 and y2 respectively; the pixel distance between the lower edge of the water-cooling plate and the upper edge of the outer water jacket can be obtained through y2-y1, and then according to the actual distance between the lower edge of the water-cooling plate and the upper edge of the outer water jacket, the first corresponding relationship between the pixel position and the actual distance of the image captured by the CCD device is obtained, k1=Y / (y2-y1). The pixel position of the electrode in the image captured by the CCD device and the actual relative position of the electrode also satisfy the first corresponding relationship, so the electrode position calculation formula can be obtained according to the first corresponding relationship, and the electrode position can be automatically adjusted by the electrode position calculation formula. Among them, the actual distance Y between the lower edge of the water-cooling plate and the upper edge of the outer water jacket under actual conditions is the equipment setting distance, which will not change after setting. This parameter can be input into the parameter setting table by a technician, and its general setting range is between 50-200.

[0037] In some embodiments, the electrode position calculation formula may be determined by determining a first correspondence relationship through the first photo taken by the CCD device when starting to take photos, and then the electrode position calculation formula is determined using the first correspondence relationship, and the electrode position is automatically adjusted in real time.

[0038] In some embodiments, the electrode position calculation formula can also be determined in advance, that is, the electrode, the lower edge of the water cooling plate and the upper edge of the outer water jacket are photographed by a CCD device in advance to obtain a first corresponding relationship corresponding to the CCD device, and the electrode position calculation formula is determined using the first corresponding relationship. The electrode position calculation formula is then stored in a one-to-one correspondence with the position and parameters of the CCD device, so that when the electrode position is subsequently controlled by the CCD device, the electrode position calculation formula corresponding to the CCD device can be directly called to improve the efficiency of electrode position control.

[0039] Furthermore, the electrode position calculation formula is Y3=k1*(y3-y1); where Y3 is the relative position of the electrode and y3 is the pixel position of the electrode. Figure 3 , the pixel position of the bottom boundary of the electrode in the image can be read through visual software, recorded as y3. Generally, when making a crucible, y3 is set between y2 and y1, that is, the bottom boundary of the electrode is always between the bottom edge of the water-cooled plate and the top edge of the outer water jacket. According to the electrode position calculation formula Y3=k1*(y3-y1), the relative position Y3 of the electrode can be calculated. When melting the crucible, the position of the bottom boundary of the electrode is observed in real time by the CCD device, and the electrode is adjusted to descend in real time according to this position, so that the position of the bottom boundary of the electrode remains unchanged relative to the bottom edge of the water-cooled plate and the top edge of the outer water jacket, thereby realizing automatic control of the electrode position. In some embodiments, such as Figure 3As shown, the bottom positions of the three electrodes in the image taken by the CCD device are inconsistent, but the actual bottom positions of the three electrodes are not much different, and the accuracy requirement of electrode control is not high. Therefore, the electrode with the lowest bottom position can be taken, and the pixel position of the bottom boundary of the electrode is recorded as y3, so as to adjust the position of the electrode so that the pixel position of its bottom boundary reaches the pixel position corresponding to the preset relative position.

[0040] Furthermore, the position and opening and closing size of the electrode are adjusted in real time according to the image, the predetermined calculation formula and the set parameters, and also include: The boundary positions of the pixels adjacent to the electrodes on both sides are read from the image; the present invention realizes automatic control of the opening and closing size of the electrodes through a CCD device, and the control principle is to read the spacing between the electrodes in the image through visual software, and obtain the actual spacing between the electrodes according to the predetermined electrode opening and closing data calculation formula, and compare it with the spacing of the electrodes in the set parameters to control the opening and closing size of the electrodes. That is, controlling the opening and closing size of the electrodes mainly controls the spacing between the three electrodes, wherein the spacing between any two adjacent electrodes is the same. Since the captured image is two-dimensional, what is obtained is as follows Figure 3 In the image shown, the spacing between the middle electrode b and the electrodes a and c on both sides cannot be directly obtained in the image. Therefore, when reading the spacing between the electrodes in the image, the electrodes on both sides, that is, the pixel boundary adjacent to the electrodes a and c, is mainly read as the pixel spacing between the electrodes in the image, and reading the pixel boundary position adjacent to the electrodes on both sides is to read the pixel boundary position adjacent to the electrodes on both sides in the X direction.

[0041] The preset opening and closing data of the electrodes are obtained based on the set parameters; wherein the preset opening and closing data may refer to the preset spacing between the three electrodes.

[0042] The electrode opening and closing size is adjusted according to the predetermined electrode opening and closing data calculation formula, pixel boundary position and preset opening and closing data. During the crucible melting process, the electrode needs to open or close according to the stage of crucible melting. The CCD device can observe the electrode opening and closing in real time and compare it with the set opening and closing data to adjust the electrode opening and closing size in real time, thereby ensuring the normal operation of the electrode.

[0043] Furthermore, the method for determining the electrode opening and closing data calculation formula includes: Obtaining the diameter D of the electrode based on the set parameters; Obtain the pixel boundary positions X1 and X2 of the electrode in the X direction from the image; According to the electrode diameter D, pixel boundary positions X1 and X2, the second corresponding relationship between the pixel position of the image and the actual distance is obtained as k2=D / (X2-X1); The electrode opening and closing data calculation formula is obtained according to the second corresponding relationship.

[0044] After the electrode arc is opened, the cross-sectional top view of the electrode head is as follows: Figure 4 As shown (since the actual vertical inclination angle of the electrode is not large, a circle is used here to represent the horizontal cross-section of the electrode), where D is the diameter of the electrode. This value can be obtained based on the model of the electrode used and entered in the set melting parameter process table. d is the electrode spacing. The principle of arcing of the melting machine electrode is to first close the electrode, that is, to make the d value 0, and then pass current through the electrode. The current is input according to the given conditions in the melting parameter process table. At the same time, the equipment controls the electrode to open. Since alternating current is input between the electrodes, arcing is generated between the electrodes, and the tip of the electrode heats up and generates strong arc light. The arc light of the electrode head is filtered, and the bright light of the electrode head can be seen. The image is obtained by shooting with a CCD device. Figure 3 By analyzing the CCD image and processing it with visual software, the pixel boundary positions X1 and X2 in the X direction of the electrode can be captured, that is, Figure 4 The image pixel difference D in the image can be used to calculate the second corresponding relationship k2=D / (X2-X1) between the actual electrode diameter D and the pixel difference in the image. When the CCD device is fixed and the electrode position is also fixed, the k2 value is fixed. The spacing between the electrodes in the image and the actual spacing between the electrodes also satisfy the second corresponding relationship. Therefore, the electrode opening and closing data calculation formula can be determined based on the second corresponding relationship, and the electrode spacing d can be determined based on the pixel boundary position between the electrodes on both sides.

[0045] Furthermore, the electrode opening and closing data calculation formula is d=k2*(X4-X3), where d is the electrode spacing, and X3 and X4 are the pixel boundary positions adjacent to the electrodes on both sides. Figure 3 , read the pixel boundary positions X3 and X4 of the electrodes on both sides of the image through visual software, and use the electrode opening and closing data calculation formula to get the actual electrode spacing d at this time, and compare the electrode spacing d with the electrode opening and closing size in the set parameters, so as to drive the opening and closing of the electrode for automatic control. Figure 3 , Figure 5 As shown, when the electrode spacing is small, the adjacent boundaries of the electrodes on both sides will be blocked by the middle electrode, and the blocked boundaries of the electrodes can be detected by visual software, and then the pixel position of the boundary can be read.

[0046] What is disclosed above is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. A person skilled in the art can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A crucible melting electrode control method, characterized in that: The following steps are involved: When the electrode starts to draw an arc, a CCD device is controlled to take a picture, wherein the CCD device is arranged on one side of the crucible mold and at a height between the water cooling plate and the outer water jacket; Acquire an image including the electrode, the lower edge of the water-cooling plate, and the upper edge of the outer water jacket taken by the CCD device; The position and opening and closing size of the electrode are adjusted in real time according to the image, a predetermined calculation formula and set parameters.

2. The crucible melting electrode control method according to claim 1, characterized in that: The position and opening and closing size of the electrode are adjusted in real time according to the image, a predetermined calculation formula and set parameters, including: reading pixel positions of electrodes from the image; Acquiring a preset relative position of the electrode based on the set parameters; The position of the electrode is adjusted according to a predetermined electrode position calculation formula, the pixel position and the preset relative position.

3. The crucible melting electrode control method according to claim 2, characterized in that: The method for determining the electrode position calculation formula includes: Obtain the actual distance Y between the lower edge of the water cooling plate and the upper edge of the outer water jacket based on the set parameters; Read the Y-direction pixel position y1 of the lower edge of the water cooling plate and the Y-direction pixel position y2 of the upper edge of the outer water jacket from the image; A first corresponding relationship between the pixel position of the image and the actual distance is obtained according to the actual distance Y, the Y direction pixel position y1 and the Y direction pixel position y2: k1=Y / (y2-y1); The electrode position calculation formula is obtained according to the first corresponding relationship.

4. The crucible melting electrode control method according to claim 3, characterized in that: The electrode position calculation formula is Y3=k1*(y3-y1); wherein Y3 is the relative position of the electrode, and y3 is the pixel position of the electrode.

5. The crucible melting electrode control method according to claim 4, characterized in that: The adjusting the position of the electrode according to the predetermined electrode position calculation formula, the pixel position and the preset relative position includes: Calculating the preset pixel position of the electrode according to a predetermined electrode position calculation formula and the preset relative position; The preset pixel position is compared with the pixel position, and the position of the electrode is adjusted according to the comparison result.

6. The crucible melting electrode control method according to claim 1, characterized in that: According to the image, the predetermined calculation formula and the set parameters, the position and opening and closing size of the electrode are adjusted in real time, and also includes: Reading the pixel boundary positions adjacent to the electrodes on both sides from the image; Acquiring preset opening and closing data of the electrode based on the set parameters; The opening and closing size of the electrode is adjusted according to a predetermined electrode opening and closing data calculation formula, the pixel point boundary position and the preset opening and closing data.

7. The crucible melting electrode control method according to claim 6, characterized in that: The method for determining the electrode opening and closing data calculation formula includes: Obtaining the diameter D of the electrode based on the set parameters; Obtain pixel boundary positions X1 and X2 on both sides of the electrode in the X direction from the image; A second corresponding relationship between the pixel position of the image and the actual distance is obtained according to the diameter D and the pixel point boundary positions X1 and X2: k2=D / (X2-X1); The electrode opening and closing data calculation formula is obtained according to the second corresponding relationship.

8. The crucible melting electrode control method according to claim 7, characterized in that: The electrode opening and closing data calculation formula is d=k2*(X4-X3), where d is the electrode spacing, and X3 and X4 are the boundary positions of the pixel points adjacent to the electrodes on both sides.

9. The crucible melting electrode control method according to claim 1, characterized in that: A water-cooling partition, heat insulation and filter glass are arranged on one side of the CCD device close to the crucible mold.

10. The crucible melting electrode control method according to claim 1, characterized in that: When controlling the CCD device to take pictures, the aperture is adjusted so that the CCD device can clearly capture the boundary position of the electrode, the lower edge of the water cooling plate and the upper edge of the outer water jacket.

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