Vacuum induction melting method, device and furnace

Abstract

The present application relates to the technical field of smelting, in particular to a vacuum induction smelting method, device and smelting furnace. The method comprises the following steps: obtaining an initial liquid level in a crucible unit; based on the initial liquid level being less than a first preset height, swinging the crucible unit to an inclined posture; based on the crucible unit being in the inclined posture, vertically feeding a material rod into the crucible body; based on the material rod in the crucible body being vertically arranged, swinging the crucible unit to a vertical posture, so that the material rod in the crucible body is inclined away from the side of the crucible nozzle. In this way, the problem that smelting liquid droplets adhere to the liquid surface or the wall surface of the crucible body and then quickly condense and form a solidification layer, which promotes the formation of a crust on the liquid surface, reduces the effective liquid surface, and hinders heat transfer, is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of smelting, in particular to a vacuum induction smelting method, device and smelting furnace. BACKGROUND

[0002] Vacuum induction smelting is an important process in the preparation of metal materials. In actual smelting operations, the initial placement position of the material rod in the crucible is directly related to the uniformity of heating. Reasonable placement can ensure synchronous melting of the material and avoid local melting lag, while unreasonable placement can easily cause uneven heating, local melting lag and bridging of material blocks. The timing of secondary feeding and the adjustment of melting power need to be accurately matched with the smelting process to maintain the stability of the liquid surface temperature field and flow field, and to ensure that the liquid surface is in a continuous melting state. At the same time, during the melting and collapsing of the material, splashing is inevitable. After the splashing material adheres to the liquid surface of the melt or the crucible wall, it will quickly condense due to the temperature difference in the crucible environment, forming a solidified layer. These process and operation factors are interrelated and interact, affecting the stability of the vacuum induction smelting process, determining whether the melt liquid surface can maintain a normal melting state, and further having a fundamental impact on production continuity, product quality and equipment operation safety.

[0003] In existing vacuum induction smelting technology, the generation of melt liquid surface freezing and furnace sealing problems is caused by the coupling and superposition of multiple process and operation factors. Uneven heating caused by unreasonable initial placement of the material, temperature field and flow field fluctuations caused by mismatching of the timing of secondary feeding and the adjustment of melting power all weaken the ability of the liquid surface to stably melt; and the solidified layer formed by the inevitable splashing further exacerbates the freezing of the liquid surface, reduces the effective liquid surface and hinders heat transfer. The interaction of the above factors makes the melt liquid surface prone to local or overall freezing, which in turn causes furnace sealing, disturbs the subsequent feeding and normal smelting process, and the core problem is that the process and operation factors lack coordinated control, which leads to the destruction of the stability of the liquid surface and ultimately affects the production continuity and safe operation of the equipment. SUMMARY

[0004] To solve the problem that the splashing liquid droplets adhere to the wall of the liquid surface or the crucible body and are prone to quick condensation and form a solidified layer, which causes the liquid surface to freeze, reduces the effective liquid surface and hinders heat transfer, the present application provides a vacuum induction smelting method, device and smelting furnace.

[0005] In a first aspect, the present application provides a vacuum induction smelting method, which comprises:

[0006] obtaining the initial liquid surface height in the crucible unit; wherein the crucible unit comprises a crucible body and a crucible nozzle; the crucible nozzle is connected with the opening of the cavity of the crucible body;

[0007] based on the initial liquid level being less than a first preset height, the crucible unit is swung to an inclined posture; wherein, in the inclined posture, an angle between the axis of the crucible body and the vertical direction is a first angle, and an angle between the line from the center of the bottom of the cavity of the crucible body to the crucible mouth and the vertical direction is a second angle; the first angle and the second angle are acute angles; the second angle is greater than the first angle;

[0008] based on the crucible unit being in the inclined posture, a material rod is vertically inserted into the crucible body;

[0009] based on the material rod in the crucible body being vertically arranged, the crucible unit is swung to a vertical posture, so that the material rod in the crucible body is inclined away from the crucible mouth; wherein, in the vertical posture, the axis of the crucible body is vertically arranged.

[0010] Optionally, the vacuum induction melting method further comprises:

[0011] based on the crucible unit being in the vertical posture and the angle between the material rod in the crucible unit and the axis of the crucible body being greater than 0, the crucible unit is reciprocally swung around a preset axis; wherein, the preset axis is perpendicular to the axis of the crucible body; the preset axis is perpendicular to the line from the center of the bottom of the cavity of the crucible body to the crucible mouth.

[0012] Optionally, the vacuum induction melting method further comprises:

[0013] based on the crucible unit being in the swinging state, the melting liquid level in the crucible body is acquired in real time;

[0014] the swinging parameters of the crucible body are adjusted according to the melting liquid level; the swinging parameters include a swinging amplitude; the swinging amplitude is negatively correlated with the melting liquid level.

[0015] Optionally, the swinging parameters further include a swinging frequency, and the swinging frequency is positively correlated with the melting liquid level.

[0016] Optionally, in the process of reciprocally swinging the crucible unit, the maximum angle of the axis of the crucible body from the vertical state towards the crucible mouth is greater than the maximum angle of the axis of the crucible body from the vertical state away from the crucible mouth.

[0017] Optionally, the vacuum induction melting method further comprises:

[0018] based on the melting liquid level reaching a second preset height, the crucible unit is stopped from swinging and restored to the vertical posture; wherein, the second preset height is greater than the first preset height;

[0019] based on the smelting liquid level reaching the second preset height and the crucible unit being in a static state, moving a liquid level heating unit above the liquid level in the crucible body to heat the liquid level in the crucible body.

[0020] Optionally, the vacuum induction smelting method further comprises:

[0021] based on the initial liquid level being higher than the first preset height, suspending the rod above the liquid level in the crucible unit to preheat the rod;

[0022] based on the preheating of the rod being completed, putting the rod into the crucible body.

[0023] Optionally, based on the preheating of the rod being completed, putting the rod into the crucible body comprises:

[0024] based on the preheating of the rod being completed, putting the rod into the crucible body.

[0025] Secondly, the present application provides a vacuum induction smelting device applied to the vacuum induction smelting method of any one of the first aspect.

[0026] The vacuum induction smelting device comprises:

[0027] an acquisition module, configured to acquire an initial liquid level in a crucible unit; wherein the crucible unit comprises a crucible body and a crucible mouth; the crucible mouth is connected with an opening of a cavity of the crucible body;

[0028] a first control module, configured to, based on the initial liquid level being less than a first preset height, control a swing unit to swing the crucible unit to an inclined posture; wherein, in the inclined posture, an angle between an axis of the crucible body and a vertical direction is a first angle, and an angle between a line connecting a center of a cavity bottom of the crucible body and the crucible mouth and the vertical direction is a second angle; the first angle and the second angle are both acute angles; the second angle is greater than the first angle;

[0029] a second control module, configured to, based on the crucible unit being in the inclined posture, control a rod feeding unit to put a rod vertically into the crucible body;

[0030] A third control module, which is arranged vertically in the crucible body, controls the swing unit to swing the crucible unit to a vertical posture, so that the material rod in the crucible body is inclined to the side away from the crucible nozzle; wherein the axis of the crucible body is arranged vertically in the vertical posture of the crucible unit.

[0031] In a third aspect, the present application provides a vacuum induction melting furnace.

[0032] The vacuum induction melting furnace comprises:

[0033] The vacuum induction melting device of the second aspect;

[0034] A liquid level sensor for monitoring the liquid level in the crucible body; the liquid level sensor is electrically connected with the vacuum induction melting device;

[0035] A swing unit for driving the swing of the crucible unit; the swing unit is electrically connected with the vacuum induction melting device;

[0036] A feeding unit for clamping and feeding the material rod; the feeding unit is electrically connected with the vacuum induction melting device.

[0037] To solve the problem that the molten liquid droplets adhere to the wall of the crucible body after splashing, which can quickly condense and form a solidified layer, causing the liquid level to form a crust, the effective liquid level to shrink, and the heat transfer to be hindered, the present application has the following advantages:

[0038] By controlling the posture of the crucible unit before and after feeding, the present application can make the top of the material rod inclined to the side away from the crucible nozzle, and use the material rod to block the splashing path of the splashing material away from the crucible nozzle as much as possible. The solidified liquid droplets near the crucible nozzle can be melted again when the crucible unit pours the molten liquid through the crucible nozzle during the shell pouring process, further reducing the impact of liquid droplet splashing on the melting process. Therefore, by adjusting the posture of the crucible unit during the feeding stage, the present application can melt the molten material adhering to the wall of the crucible body. Thus, local or overall freezing of the molten liquid is avoided, and the risk of furnace sealing, affecting subsequent feeding and normal melting process is reduced, thereby improving production continuity and stability, reducing the risk of shutdown and rework, and ensuring production efficiency, product quality and safe operation of equipment. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 A flowchart of the vacuum induction melting method of embodiment one is shown;

[0040] Figure 2A simple schematic of the tilting of the crucible unit for the charging in the vertical position in example three is shown;

[0041] Figure 3 A simple schematic of the tilting of the crucible unit for the charging in the vertical position in example three is shown.

[0042] Reference signs: crucible unit 10; crucible body 11; crucible mouth 12; charge rod 20. DETAILED DESCRIPTION

[0043] The present disclosure will now be discussed with reference to a number of example embodiments. It should be appreciated that these embodiments are discussed solely for the purpose of enabling those with ordinary skill in the art to better understand and consequently implement the present disclosure and are not intended to limit the scope of the present disclosure in any way.

[0044] As used herein, the terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "containing," or any other variation thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Further, unless expressly stated to the contrary, "or" refers to an inclusive or and not to an exclusive or. For example, a condition A or B is satisfied by any one of the following: A is true (or A is satisfied); B is true (or B is satisfied); or A and B are both true (or A and B are both satisfied). In addition, the terms "a," "an," and "the" are intended to not refer to only a singular entity but also to include the plural. For example, a "a" or "an" entity is also "the" entity. Further, unless otherwise specified, the use of "or" in any statement herein shall not be understood to be exclusive. That is, an inclusive "or" can be construed as A, B, or both A and B.

[0045] Vacuum induction melting is an important process in the preparation of metal materials. In actual melting operation, the initial placement position of the material rod in the crucible directly relates to the uniformity of heating. Reasonable placement can ensure synchronous melting of the material and avoid local melting lag, while unreasonable placement can easily cause uneven heating, local melting lag, and bridging of material blocks. The timing of secondary feeding and the adjustment of melting power need to be accurately matched with the melting process to maintain the stability of the liquid surface temperature field and flow field, and to ensure that the liquid surface is in a continuous melting state. At the same time, during the melting and collapsing of the material, splashing is inevitable. After the splashing material adheres to the molten liquid surface or the crucible wall, it will quickly condense due to the temperature difference in the crucible environment, forming a solidified layer. These process and operation factors are interrelated and jointly affect the stability of the vacuum induction melting process, determine whether the molten liquid surface can maintain a normal melting state, and thus have a fundamental impact on production continuity, product quality, and equipment operation safety.

[0046] In existing vacuum induction melting technology, the generation of molten liquid surface freezing and furnace sealing problems is caused by the coupling and superposition of multiple process and operation factors. Uneven heating caused by unreasonable initial placement of the material, temperature field and flow field fluctuations caused by mismatching of the timing of secondary feeding and the adjustment of melting power, all weaken the ability of the liquid surface to stably melt; and the solidified layer formed by the inevitable splashing further exacerbates the liquid surface crust, reduces the effective liquid surface, and hinders heat transfer. The interaction of the above factors makes the molten liquid surface prone to local or overall freezing, which in turn causes the furnace to be sealed, disrupting the subsequent feeding and normal melting process. The core problem is the lack of coordinated control of various process and operation factors, which leads to the destruction of the stability of the liquid surface and ultimately affects the production continuity and safe operation of the equipment.

[0047] Embodiment One:

[0048] In this embodiment, to solve the above problems, the present application provides a vacuum induction melting method, as shown in Figure 1 The vacuum induction melting method includes steps S10-S20. Step S20 includes steps S21-S23. The vacuum induction melting method sequentially executes steps S10, S21, S22, and S23. Steps S10-S20 can be described in detail below:

[0049] Step S10, the initial liquid level in the crucible unit 10 is obtained, and the basic situation of the molten liquid in the crucible body 11 is accurately grasped. The crucible unit 10 includes a crucible body 11 and a crucible nozzle 12, and the crucible nozzle 12 is connected with the opening of the container cavity of the crucible body 11. The crucible body 11 is a kind of high-temperature-resistant container that can complete metal melting in a high-temperature environment. The crucible nozzle 12 can form a fixed flow channel, allowing the molten liquid in the crucible body 11 to flow smoothly along the crucible nozzle 12, improving the safety of the operation.

[0050] Step S21, based on the initial liquid level being less than the first preset height, the crucible unit 10 is swung to an inclined posture. Wherein, the crucible unit 10 is in the inclined posture, the axis of the crucible body 11 is at a first angle with the vertical direction, the line from the center of the bottom of the cavity of the crucible body 11 to the crucible spout 12 is at a second angle with the vertical direction, both the first angle and the second angle are acute angles, and the second angle is greater than the first angle.

[0051] Step S22, as shown in the figure, Figure 2 , based on the crucible unit 10 being in the inclined posture, the material rod 20 is vertically inserted into the crucible body 11.

[0052] Step S23, based on the material rod 20 in the crucible body 11 being vertically set, as shown in the figure, Figure 3 , the crucible unit 10 is swung to a vertical posture, so that the material rod 20 in the crucible body 11 is inclined away from the side of the crucible spout 12. Wherein, the crucible unit 10 is in the vertical posture, the axis of the crucible body 11 is vertically set. Because spatter is difficult to completely avoid in the process of melting and collapsing of the material rod 20 in the crucible body 11, the spatter adheres to the liquid surface or the wall of the crucible body 11 and quickly condenses and forms a solidified layer, which causes the liquid surface to form a crust, reduces the effective liquid surface, and hinders heat transfer. Therefore, by controlling the posture of the crucible unit 10 before and after feeding, the top of the material rod 20 can be inclined away from the side of the crucible spout 12, and the spatter can be as far as possible to block the spatter path away from the side of the crucible spout 12. The solidified droplets near the crucible spout 12 can be melted again when the crucible unit 10 pours the molten liquid through the crucible spout 12 during the shell pouring process, further reducing the influence of droplet spatter on the smelting process. Therefore, by adjusting the posture of the crucible unit 10 during the feeding stage, the application can melt the molten material adhered to the wall of the crucible body 11. Thus, local or overall freezing of the molten liquid is avoided, and the risk of furnace sealing, affecting subsequent feeding and normal smelting process is reduced, thereby improving production continuity and stability, reducing the risk of furnace shutdown and rework, and ensuring production efficiency, product quality and safe operation of equipment.

[0053] Further, the vacuum induction melting method further comprises step S24, and the vacuum induction melting method sequentially performs steps S10, S21, S22, S23 and S24. Step S24 will be described in detail below:

[0054] Step S24, based on the crucible unit 10 in a vertical posture, and the angle between the material rod 20 in the crucible unit 10 and the axis of the crucible body 11 is greater than 0, the crucible unit 10 is reciprocated around the preset axis. Wherein, the preset axis is perpendicular to the axis of the crucible body 11, and the preset axis is perpendicular to the connecting line from the center of the cavity bottom of the crucible body 11 to the crucible nozzle 12. In the smelting process, the crucible unit 10 itself needs to swing around the preset axis to pour the molten metal in the crucible body 11 through the crucible nozzle 12 into the mold shell for casting work. The application drives the slight shaking of the molten metal in the crucible body 11 by reusing the swing mechanism, melts the cold material splashed on the wall of the crucible body 11, and avoids the splashes from adhering to the liquid surface or the wall of the crucible body 11, which is easy to quickly condense and form a solidification layer. At the same time, the slight shaking can avoid the sticky trend that may be formed between the material rod 20 and the crucible wall, promote the flow of the molten metal in the crucible body 11, make the material rod 20 fully contact with the molten metal, and improve the smelting uniformity.

[0055] Further, the vacuum induction melting method further comprises steps S25 and S26, and the vacuum induction melting method sequentially executes steps S10, S21, S22, S23, S24, S25, and S26. Steps S25 and S26 can be described in detail below:

[0056] Step S25, based on the fact that the crucible unit 10 is in a swing state, the smelting liquid level in the crucible body 11 is obtained in real time, and the smelting liquid level is obtained in real time to accurately grasp the dynamic changes of the liquid level.

[0057] Step S26, according to the smelting liquid level, the swing parameters of the crucible body 11 are adjusted, and the swing parameters include the swing amplitude. The swing amplitude is negatively correlated with the smelting liquid level. When the liquid level is low, increasing the swing amplitude can more fully drive the molten metal to move to contact a larger area of the inner wall of the crucible body 11, and melt the splashes adhered to the wall of the crucible body 11. When the liquid level is high, the swing amplitude of the crucible body 11 needs to be reduced, so as to avoid the splashing of the molten metal due to the too large swing amplitude, and to ensure the safety and stability of the smelting process.

[0058] Further, the swing parameters further include the swing frequency, and the swing frequency is positively correlated with the smelting liquid level. When the material rod 20 just enters the crucible body 11, the solid part is more, and the liquid level is low. A slower swing frequency is used to reduce the damage of the material rod 20 to the wall of the crucible body 11. When the liquid level is high, the material rod 20 has been mostly melted, so the swing frequency is increased, the splashes on the wall of the crucible body 11 are efficiently melted, and the uniformity of the molten metal is improved. Through the coordinated adjustment of the amplitude and the frequency, the smelting requirements under different liquid levels are adapted, and the smelting effect is optimized.

[0059] Further, in the reciprocating swinging process of the crucible unit 10, the maximum angle of the axis of the crucible body 11 swinging from the vertical state towards the crucible nozzle 12 is greater than the maximum angle of the axis of the crucible body 11 swinging from the vertical state away from the crucible nozzle 12. Such an angle setting can make the crucible body 11 swing towards the crucible nozzle 12 direction with a large amplitude, guarantee that the molten liquid in the crucible can flow into the mold shell through the crucible nozzle 12, and facilitate the subsequent manufacturing of the casting. At the same time, it can also melt the splashes adhering to the wall surface of the crucible body 11. By swinging away from the crucible nozzle 12 with a small amplitude, the efficiency of further melting in the limited pouring chamber during the swinging process of the crucible unit 10 can be maximized.

[0060] Further, the vacuum induction melting method further comprises steps S27 and S28, and the vacuum induction melting method sequentially executes steps S10, S21, S22, S23, S24, S25, S26, S27, and S28.

[0061] Based on the influence of liquid surface heat volatilization, since the temperature in the crucible unit 10 decreases from bottom to top, when the melting liquid level reaches the second preset height, the upper part of the molten liquid is prone to rapid condensation and forms a solidification layer, which promotes the formation of crust on the liquid surface and reduces the effective liquid level. Therefore, the present application adopts steps S27 and S28 to solve the above problems, which will be described in detail below:

[0062] Step S27, based on the melting liquid level reaching the second preset height, the crucible unit 10 is stopped from swinging and restored to the vertical state, which can avoid the instability of the molten liquid due to swinging during subsequent heating. Among them, the second preset height is greater than the first preset height.

[0063] Step S28, based on the melting liquid level reaching the second preset height and the crucible unit 10 being in a static state, the liquid surface heating unit is moved above the liquid surface in the crucible body 11 to heat the liquid surface in the crucible body 11. By supplementing the heating of the liquid surface by the liquid surface heating unit, the freezing of the liquid surface is further prevented, the melting process is ensured to continue smoothly, and the interruption of melting and equipment failure caused by freezing are avoided.

[0064] Further, the vacuum induction melting method further comprises step S30, which comprises steps S31 and S32, and the vacuum induction melting method sequentially executes steps S10, S31, and S32. Steps S31 and S32 will be described in detail below:

[0065] Since the initial liquid level is higher than the first preset height, when the material rod 20 is put in, it is not suitable to swing the crucible unit 10 to an inclined posture to prevent the molten metal in the crucible body 11 from flowing out. Therefore, step S31 of the present application is based on the initial liquid level being higher than the first preset height, and the material rod 20 is suspended above the liquid level in the crucible unit 10 to preheat the material rod 20. The suspension preheating of the material rod 20 can use the heat volatilized by the liquid to pre-treat the cold material, reduce the temperature difference between the cold material after being put in and the high-temperature molten metal, reduce the violent reaction and temperature drop of the molten metal when the cold material is put in, avoid the splashing of the molten metal and the fluctuation of the smelting temperature, and improve the subsequent melting efficiency of the material rod 20.

[0066] Step S32, based on the preheating of the material rod 20 being completed, the material rod 20 is put into the crucible body 11.

[0067] Further, step S32 includes step S321, which is an optimization of step S32. The vacuum induction melting method sequentially performs steps S10, S31, and S321. Step S321 will be described in detail below:

[0068] Step S321, based on the preheating of the material rod 20 being completed, the material rod 20 is put into the crucible body 11 from the axis of the crucible body 11 to one side of the crucible spout 12. The vertical feeding of the material rod 20 from the axis of the crucible body 11 to one side of the crucible spout 12 can make the splashing of the material rod 20 after being put in as much as possible towards one side of the crucible spout 12, which facilitates the melting of the splashing attached to the wall of the crucible body 11 during the process of the molten metal flowing into the casting chamber through the crucible spout 12.

[0069] Embodiment two:

[0070] In this embodiment, the present application provides a vacuum induction melting device, which is applied to the vacuum induction melting method of any one of the first aspect. The vacuum induction melting device includes an acquisition module, a first control module, a second control module, and a third control module.

[0071] The acquisition module is used to acquire the initial liquid level in the crucible unit 10. The crucible unit 10 includes a crucible body 11 and a crucible spout 12. The crucible spout 12 is connected with the opening of the cavity of the crucible body 11. The acquisition module can accurately collect the initial liquid level data, provide accurate basis for the control operation of the subsequent modules, ensure that the device operates according to the preset process logic, and avoid operation deviation caused by data error.

[0072] The first control module controls the swing unit to swing the crucible unit 10 to an inclined posture based on the initial liquid level being less than the first preset height. When the crucible unit 10 is in the inclined posture, the angle between the axis of the crucible body 11 and the vertical direction is a first angle, and the angle between the line connecting the center of the bottom of the cavity of the crucible body 11 and the crucible spout 12 and the vertical direction is a second angle. Both the first angle and the second angle are acute angles, and the second angle is greater than the first angle. The first control module can precisely control the inclined posture of the crucible unit 10, ensure that the angle parameters meet the process requirements, create suitable conditions for the vertical placement of the material rod 20, and improve the precision and reliability of the device operation.

[0073] The second control module controls the feeding unit to vertically feed the material rod 20 into the crucible body 11 based on the crucible unit 10 being in the inclined posture. The second control module can coordinate the posture of the crucible and the feeding action to ensure that the material rod 20 is accurately fed into the crucible body 11 in a vertical posture, avoiding problems such as tipping and collision of the material rod 20 caused by feeding posture deviation, and ensuring the stability of the feeding process.

[0074] The third control module controls the swing unit to swing the crucible unit 10 to a vertical posture based on the material rod 20 in the crucible body 11 being vertically arranged, so that the material rod 20 in the crucible body 11 is inclined away from the crucible spout 12. When the crucible unit 10 is in the vertical posture, the axis of the crucible body 11 is vertically arranged. The third control module can precisely control the reset of the crucible unit 10, realize the reasonable placement of the material rod 20 through posture adjustment, avoid the material rod 20 being close to the crucible spout 12 affecting the subsequent process, and ensure smooth connection of each step of the device.

[0075] Embodiment Three:

[0076] In this embodiment, the vacuum induction melting furnace includes the vacuum induction melting device of embodiment two, a liquid level sensor, a swing unit, and a feeding unit.

[0077] The liquid level sensor is used to monitor the liquid level in the crucible body 11 and is electrically connected to the vacuum induction melting device. The liquid level sensor can provide real-time feedback of the liquid level data to support the dynamic control of the device.

[0078] The swing unit is used to drive the swing of the crucible unit 10 and is electrically connected to the vacuum induction melting device. The swing unit can accurately execute posture adjustment and swing instructions to ensure the accuracy of the movement of the crucible.

[0079] The feeding unit is used to hold and feed the material rod 20, and is electrically connected to the vacuum induction melting device. The feeding unit can stably hold the material rod 20 and complete the feeding action. The components are electrically connected to the vacuum induction melting device to form a coordinated system, realize the automatic control of the vacuum induction melting process, and improve the melting efficiency and process stability.

[0080] It is understood by those of ordinary skill in the art that the above-mentioned embodiments are specific cases for implementing the present disclosure, and in actual applications, various changes can be made in form and details without departing from the scope of the present disclosure.

Claims

1. A vacuum induction melting method, characterized by, The vacuum induction melting method comprises: obtaining an initial liquid level in a crucible unit; wherein the crucible unit comprises a crucible body and a crucible nozzle; the crucible nozzle is connected with an opening of a cavity of the crucible body; based on the initial liquid level being less than a first preset height, swinging the crucible unit to an inclined posture; wherein, in the inclined posture, an angle between an axis of the crucible body and a vertical direction is a first angle, and an angle between a line from a center of a bottom of the cavity of the crucible body to the crucible nozzle and the vertical direction is a second angle; the first angle and the second angle are acute angles; the second angle is greater than the first angle; based on the crucible unit being in the inclined posture, vertically inserting a material rod into the crucible body; based on the material rod in the crucible body being vertically arranged, swinging the crucible unit to a vertical posture, so that the material rod in the crucible body is inclined away from the crucible nozzle; wherein, in the vertical posture, the axis of the crucible body is vertically arranged.

2. The vacuum induction melting method according to claim 1, wherein the vacuum induction melting method further comprises: based on the crucible unit being in the vertical posture and an angle between the material rod in the crucible unit and the axis of the crucible body being greater than 0, swinging the crucible unit back and forth around a preset axis; wherein, the preset axis is perpendicular to the axis of the crucible body; and the preset axis is perpendicular to the line from the center of the bottom of the cavity of the crucible body to the crucible nozzle.

3. The vacuum induction melting method according to claim 2, wherein the vacuum induction melting method further comprises: based on the crucible unit being in the swinging state, obtaining a real-time melting liquid level in the crucible body; adjusting a swinging parameter of the crucible body according to the melting liquid level; the swinging parameter comprises a swinging amplitude; the swinging amplitude is negatively correlated with the melting liquid level.

4. The vacuum induction melting method according to claim 3, wherein the swinging parameter further comprises a swinging frequency; the swinging frequency is positively correlated with the melting liquid level.

5. The vacuum induction melting method according to claim 2, wherein in the process of swinging the crucible unit back and forth, a maximum angle of the axis of the crucible body swinging from a vertical state towards the crucible nozzle is greater than a maximum angle of the axis of the crucible body swinging from the vertical state away from the crucible nozzle.

6. The vacuum induction melting method according to claim 3, wherein the vacuum induction melting method further comprises: based on the melting liquid level reaching a second preset height, stopping the swinging of the crucible unit and restoring the crucible unit to the vertical posture; wherein, the second preset height is greater than the first preset height; based on the melting liquid level reaching the second preset height and the crucible unit being in a static state, moving a liquid level heating unit above the liquid level in the crucible body to heat the liquid level in the crucible body.

7. The vacuum induction melting method according to claim 1, wherein The vacuum induction melting method further comprises: based on the initial liquid level being higher than the first preset height, hovering the rod above the liquid level in the crucible unit to preheat the rod; based on the preheating of the rod being completed, putting the rod into the crucible body.

8. The vacuum induction melting method according to claim 7, wherein, based on the preheating of the rod being completed, putting the rod into the crucible body, comprises: based on the preheating of the rod being completed, putting the rod into the crucible body in a vertical manner and deviating from the axis of the crucible body to one side of the crucible nozzle.

9. A vacuum induction melting device applied to the vacuum induction melting method in any one of claims 1-8, wherein, the vacuum induction melting device comprises: an acquisition module, configured to acquire an initial liquid level in a crucible unit; wherein the crucible unit comprises a crucible body and a crucible nozzle; the crucible nozzle is connected with an opening of a cavity of the crucible body; a first control module, configured to control a swinging unit to swing the crucible unit to an inclined posture based on the initial liquid level being less than a first preset height; wherein, in the inclined posture, an angle between an axis of the crucible body and a vertical direction is a first angle, and an angle between a line from a center of a cavity bottom of the crucible body to the crucible nozzle and the vertical direction is a second angle; the first angle and the second angle are both acute angles; and the second angle is greater than the first angle; a second control module, configured to control a feeding unit to put a rod into the crucible body in a vertical manner based on the crucible unit being in the inclined posture; a third control module, configured to control the swinging unit to swing the crucible unit to a vertical posture based on the rod in the crucible body being arranged vertically, so that the rod in the crucible body is inclined away from the crucible nozzle; wherein, in the vertical posture, the axis of the crucible body is arranged vertically.

10. A vacuum induction melting furnace, comprising: the vacuum induction melting device in claim 9; a liquid level sensor, configured to monitor a liquid level in the crucible body; the liquid level sensor is electrically connected with the vacuum induction melting device; a swinging unit, configured to drive the crucible unit to swing; the swinging unit is electrically connected with the vacuum induction melting device; a feeding unit, configured to clamp a rod for feeding; the feeding unit is electrically connected with the vacuum induction melting device. ​

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