Vacuum induction melting holding system and apparatus
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHENYANG RES INST OF FOUNDRY
- Filing Date
- 2026-05-14
- Publication Date
- 2026-06-12
Smart Images
Figure CN122191966A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of vacuum melting technology, and more specifically, to a vacuum induction melting heat preservation system and equipment. Background Technology
[0002] During vacuum melting operations, the melting chamber needs to maintain a stable vacuum working environment. Inside the melting chamber is a melting furnace used to complete the metal melting process. The furnace top has an opening for operations such as feeding and sampling. During melting, the furnace opening continuously radiates a large amount of high-temperature heat upwards. To prevent this high-temperature heat from directly affecting the observation window on the side wall of the melting chamber and causing overheating damage, the vacuum melting equipment is equipped with a movable cover structure. The core function of this cover is to move it directly above the furnace opening during non-furnace opening operations, completely blocking the high-temperature heat radiated upwards and protecting the observation window. Simultaneously, to allow the cover to switch between the blocking and avoidance positions, a telescopic drive unit is provided. Through the power output of the telescopic drive unit, the cover rotates, allowing it to precisely move to the blocking position directly above the furnace opening, or move from the blocking position to the avoidance position, providing ample space for melting-related operations at the furnace opening.
[0003] To prevent damage to the telescopic drive unit from the vacuum environment and high temperatures within the melting chamber, the main structure of the telescopic drive unit must be located outside the melting chamber, and its telescopic shaft must extend into the chamber through the side wall. Therefore, a sliding seal structure must be installed at the penetration point between the telescopic shaft and the side wall of the melting chamber to maintain the vacuum tightness of the melting chamber. If the structural symmetry of this sliding seal structure relative to the telescopic shaft axis is poor, it will lead to uneven circumferential wall thickness. The structural strength of the thinner sections will be insufficient. Under the combined effects of the mechanical load from the long-term reciprocating telescopic motion of the telescopic shaft and the vacuum pressure difference between the inside and outside of the melting chamber, structural deformation, abnormal wear, and even seal failure and structural damage are highly likely to occur. Summary of the Invention
[0004] To address the problem of uneven circumferential wall thickness and insufficient structural strength in thinner sections of the sliding seal structure, this application provides a vacuum induction melting and heat preservation system and equipment.
[0005] In a first aspect, this application provides a vacuum induction melting and heat preservation system, the vacuum induction melting and heat preservation system comprising:
[0006] A melting chamber, wherein the side walls of the melting chamber are cylindrical;
[0007] A smelting furnace, located within the smelting chamber;
[0008] A shielding assembly is provided for shielding and avoiding the top of the smelting furnace. The shielding assembly includes a shielding cover, a swing arm unit, a telescopic drive unit, and a transition shaft. The telescopic drive unit is fixedly connected to the side wall of the smelting chamber. The telescopic drive unit includes a positioning cylinder and a telescopic shaft. The telescopic shaft slides through the positioning cylinder. The positioning cylinder is located outside the smelting chamber. The telescopic shaft slides through the smelting chamber. The axis of the telescopic drive unit is horizontally oriented. The shielding cover and the swing arm unit are located inside the smelting furnace. The swing arm unit is rotatably connected to the inner side wall of the smelting chamber about a first axis. The shielding cover is connected to the swing arm unit. The first axis is vertically oriented. The telescopic shaft is rotatably connected to the swing arm unit via the transition shaft. The transition shaft is slidably connected to the swing arm unit. The perpendicular line from the connection point of the telescopic drive unit to the side wall of the smelting chamber to the axis of the smelting chamber is a first normal line. The angle between the axis of the telescopic drive unit and the first normal line is less than 45°.
[0009] Optionally, the distance between the center of the shield and the first axis is a first distance; the distance between the transition axis and the first axis is a second distance; and the ratio of the second distance to the first distance is greater than or equal to 0.5.
[0010] Optionally, the smelting furnace is located at the center of the smelting chamber; the swing arm unit includes a main swing arm and a secondary swing arm; the main swing arm is connected to the secondary swing arm; the telescopic shaft is rotatably connected to the secondary swing arm through the transition shaft; the transition shaft is slidably connected to the secondary swing arm; in the swing trajectory of the secondary swing arm, there is a gap between the transition shaft and the axis of the smelting chamber.
[0011] Optionally, the auxiliary swing arm is provided with a sliding groove; the transition shaft passes through the sliding groove; the transition shaft slides along the sliding groove.
[0012] Optionally, the swing arm unit further includes a connecting portion; there is a height difference between the main swing arm and the auxiliary swing arm; the main swing arm and the auxiliary swing arm are connected through the connecting portion.
[0013] Optionally, the connecting part includes a connecting shaft; the connecting shaft is vertically arranged; the connecting shaft is rotatably connected to the inner wall of the melting chamber; the first axis is the axis of the connecting shaft; the main swing arm and the auxiliary swing arm are respectively fixedly connected to the connecting part.
[0014] Optionally, when the shielding cover is located at the top of the smelting furnace, the perpendicular line between the transition shaft and the first axis is the first perpendicular line; the angle between the first perpendicular line and the axis of the telescopic shaft is between 70° and 90°.
[0015] Optionally, the second perpendicular line is perpendicular to the axis of the telescopic shaft; the second perpendicular line is located between the angle bisector of the sector angle formed by the swing trajectory of the auxiliary swing arm and the first perpendicular line.
[0016] Optionally, the connecting part includes a first rotating shaft, a second rotating shaft, and a reduction module; the first rotating shaft and the second rotating shaft are respectively rotatably connected to the inner wall of the melting chamber; the first rotating shaft and the second rotating shaft are connected by transmission through the reduction module; the rotational speed of the first rotating shaft is greater than the rotational speed of the second rotating shaft; the auxiliary swing arm is fixedly connected to the first rotating shaft; and the main swing arm is fixedly connected to the second rotating shaft.
[0017] Secondly, this application provides a vacuum casting apparatus, the vacuum casting apparatus comprising:
[0018] The vacuum induction melting and heat preservation system as described in any one of the first aspects;
[0019] A slow cooling system for casting molds, comprising a mold-feeding chamber, a transition chamber, a holding chamber, and a slow cooling chamber; the mold-feeding chamber, the transition chamber, and the slow cooling chamber are arranged sequentially in a horizontal direction; the melting chamber is located above the holding chamber.
[0020] A charging system, comprising a charging chamber and a clamping assembly; the charging chamber is located above the melting chamber; the clamping assembly is located inside the charging chamber; the clamping assembly is used to charge furnace materials into the melting chamber;
[0021] A transfer system is provided for moving the shell unit within the molding chamber, the transition chamber, the insulation chamber, and the slow cooling chamber.
[0022] To address the problem of uneven circumferential wall thickness and insufficient structural strength in thinner sections of the sliding seal structure, this application offers the following advantages:
[0023] By setting the angle between the axis of the telescopic drive unit and the first normal in the vacuum induction melting and insulation system to less than 45°, and combining this with a structure in which the axis of the telescopic drive unit is horizontally positioned, the positioning cylinder is located outside the melting chamber, and the telescopic shaft slides through the positioning cylinder and then through the melting chamber, the structural symmetry of the sliding seal structure between the telescopic shaft and the side wall of the melting chamber relative to the axis of the telescopic shaft can be effectively improved. This ensures uniform wall thickness of the sliding seal structure, avoids the problem of excessively thin local wall thickness, and ensures uniform strength of all parts of the seal structure. Ultimately, this solves the problem of deformation, wear, and even damage caused by poor symmetry and insufficient local strength of the seal structure under the reciprocating telescopic motion of the telescopic shaft and the vacuum pressure difference, thus improving the operational stability and service life of the vacuum induction melting and insulation system. Attached Figure Description
[0024] Figure 1 A schematic diagram of the shielding cover of the vacuum induction melting heat preservation system of Embodiment 1 is shown, located at the avoidance station;
[0025] Figure 2 A schematic diagram of the shielding cover of the vacuum induction melting heat preservation system of Embodiment 1 located at the shielding station is shown;
[0026] Figure 3 A schematic diagram of the first normal of the vacuum induction melting and heat preservation system of Embodiment 1 is shown;
[0027] Figure 4 A schematic diagram of the first and second gaps of the vacuum induction melting heat preservation system of Embodiment 1 is shown;
[0028] Figure 5 A schematic diagram of the first vertical line of the vacuum induction melting and heat preservation system of Embodiment 1 is shown;
[0029] Figure 6 A schematic diagram of the second vertical line of the vacuum induction melting and heat preservation system of Embodiment 1 is shown;
[0030] Figure 7 A schematic diagram of the connection part of the vacuum induction melting and heat preservation system of Embodiment 1 is shown;
[0031] Figure 8 A schematic diagram of the vacuum casting equipment in Embodiment 2 is shown.
[0032] Reference numerals: Vacuum induction melting and heat preservation system 10; Melting chamber 11; Melting furnace 12; Shielding assembly 13; Shielding cover 131; Swing arm unit 132; Main swing arm 1321; Secondary swing arm 1322; Sliding groove 1323; Connecting part 1324; Connecting shaft 1325; First rotating shaft 1326; Second rotating shaft 1327; Deceleration module 1328; Telescopic drive part 133; Positioning cylinder 1331; Telescopic shaft 1332; Transition shaft 134; Casting mold slow cooling system 20; Infeed chamber 21; Transition chamber 22; Insulation chamber 23; Slow cooling chamber 24; Feeding system 30; First spacing L1; Second spacing L2; First normal n1; First perpendicular H1; Second perpendicular H2; Angle bisector C1. Detailed Implementation
[0033] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, and are not intended to imply any limitation on the scope of the disclosure.
[0034] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the terms "installed", "set up", "equipped with", "connected", and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.
[0035] Example 1:
[0036] In this embodiment, a vacuum induction melting and heat preservation system 10 is provided, such as... Figure 1 , Figure 2 As shown, the vacuum induction melting and heat preservation system 10 includes a melting chamber 11, a melting furnace 12, and a shielding component 13.
[0037] The sidewalls of the melting chamber 11 are cylindrical. The cylindrical sidewalls can ensure that the circumferential structure of the melting chamber 11 is subjected to uniform stress, improve the structural pressure stability under vacuum conditions, and reduce the difficulty of vacuuming.
[0038] The smelting furnace 12 is located inside the smelting chamber 11. The smelting furnace 12 is used to provide working space and heat source for the vacuum smelting of metal materials.
[0039] The shielding assembly 13 is used to shield and avoid the top of the smelting furnace 12, thereby blocking the high-temperature heat radiated upwards from the top of the smelting furnace 12 during the smelting operation and avoiding the top of the smelting furnace 12 when it is necessary to discharge material from the furnace opening, thus reserving sufficient operating space for the operation. The shielding assembly 13 includes a shielding cover 131, a swing arm unit 132, a telescopic drive unit 133, and a transition shaft 134. The telescopic drive unit 133 is fixedly connected to the side wall of the smelting chamber 11, thereby ensuring the stability of the installation position of the telescopic drive unit 133 and avoiding positional deviation during power output. The telescopic drive unit 133 includes a positioning cylinder 1331 and a telescopic shaft 1332. The telescopic shaft 1332 slides through the positioning cylinder 1331, and the positioning cylinder 1331 provides stable guidance and support for the reciprocating sliding of the telescopic shaft 1332, ensuring the smoothness of the telescopic movement. The positioning cylinder 1331 is located outside the melting chamber 11, thus preventing the high-temperature environment and vacuum conditions inside the melting chamber 11 from corroding and damaging the core structure of the telescopic drive unit 133, extending the service life of the drive structure. The telescopic shaft 1332 slides through the melting chamber 11, stably transmitting the linear drive power from outside the melting chamber 11 to the actuator inside the melting chamber 11. The axis of the telescopic drive unit 133 is horizontally set, ensuring that the telescopic movement of the telescopic shaft 1332 is smoothly output in the horizontal direction, avoiding vertical load deviation and reducing the risk of structural wear. The shielding cover 131 and the swing arm unit 132 are located inside the melting furnace 12. The swing arm unit 132 is rotatably connected to the inner wall of the melting chamber 11 around the first axis, allowing the swing arm unit 132 to complete a stable rotational movement around the first axis. The shielding cover 131 is connected to the swing arm unit 132, and the rotational movement of the swing arm unit 132 drives the shielding cover 131 to move synchronously, realizing a stable switching between the shielding position and the avoidance position. The first axis is vertically positioned, ensuring that the swing arm unit 132 completes its rotational movement in the horizontal plane. This prevents vertical positional deviations during the movement of the shielding cover 131, ensuring the accuracy of the shielding cover 131 in covering the top of the smelting furnace 12. The telescopic shaft 1332 is rotatably connected to the swing arm unit 132 via a transition shaft 134, which is slidably connected to the swing arm unit 132. This smoothly converts the horizontal linear telescopic motion of the telescopic shaft 1332 into the rotational motion of the swing arm unit 132, avoiding structural interference during power transmission and ensuring the continuity and stability of motion transmission.
[0040] like Figure 3As shown, the perpendicular line from the connection portion 1324 between the telescopic drive unit 133 and the side wall of the melting chamber 11 to the axis of the melting chamber 11 is the first normal n1, and the angle between the axis of the telescopic drive unit 133 and the first normal n1 is less than 45°. It should be understood that by limiting the range of the angle between the axis of the telescopic drive unit 133 and the first normal n1, the circumferential symmetry of the sliding sealing structure at the penetration point between the telescopic shaft 1332 and the side wall of the melting chamber 11 can be effectively improved, ensuring a uniform distribution of the circumferential wall thickness and structural strength of the sealing structure. This avoids problems such as uneven local wall thickness and insufficient strength caused by poor structural symmetry, and prevents the sealing structure from deforming, wearing, or even being damaged under the combined action of the mechanical load of the long-term reciprocating telescopic motion of the telescopic shaft 1332 and the vacuum pressure difference inside and outside the melting chamber 11.
[0041] Furthermore, such as Figure 4 As shown, the distance between the center of the shielding cover 131 and the first axis is the first distance L1. The distance between the transition shaft 134 and the first axis is the second distance L2. The ratio of the second distance L2 to the first distance L1 is greater than or equal to 0.5. It should be understood that by limiting the lower limit of the ratio of the second distance L2 to the first distance L1, the lever arm length of the drive end can be effectively increased. Based on the lever principle, the output driving force required for the telescopic drive unit 133 to drive the swing arm unit 132 and the shielding cover 131 to complete the station switching rotation action can be significantly reduced, achieving a labor-saving effect. At the same time, it can improve the stability of the swing arm unit 132's movement process and the station positioning accuracy of the shielding cover 131, avoiding problems such as motion jamming and shielding position deviation due to insufficient driving force.
[0042] Furthermore, the smelting furnace 12 is located at the center of the smelting chamber 11, ensuring uniform circumferential heating of the smelting furnace 12 within the smelting chamber 11. Simultaneously, it provides uniform operating space for the surrounding supporting structures, avoiding structural interference caused by positional misalignment. The swing arm unit 132 includes a main swing arm 1321 and a secondary swing arm 1322. The main swing arm 1321 is connected to the secondary swing arm 1322, enabling the stable transmission of the rotational driving force received by the secondary swing arm 1322 to the main swing arm 1321, driving the main swing arm 1321 to synchronously complete its rotational movement, ensuring the synchronicity and stability of power transmission. The telescopic shaft 1332 is rotatably connected to the secondary swing arm 1322 via a transition shaft 134, smoothly transmitting the horizontal linear telescopic power output by the telescopic shaft 1332 to the secondary swing arm 1322, providing stable driving power for the swing of the secondary swing arm 1322. The transition shaft 134 is slidably connected to the auxiliary swing arm 1322, so that during the swinging process of the auxiliary swing arm 1322 driven by the telescopic shaft 1332, the position deviation during the action is compensated by the relative sliding of the transition shaft 134 and the auxiliary swing arm 1322, so as to avoid the problem of structural jamming during power transmission and ensure the smoothness of the swinging action.
[0043] During the swing trajectory of the auxiliary swing arm 1322, there is a gap between the transition shaft 134 and the axis of the melting chamber 11. This gap ensures sufficient clearance between the power input position of the telescopic shaft 1332 and the melting furnace 12 located at the center of the melting chamber 11. The auxiliary swing arm 1322 receives the driving force of the telescopic shaft 1332 and drives the main swing arm 1321 to rotate, thereby driving the shielding cover 131 to complete the rotation position switching action. This effectively avoids the structural interference between the extension action of the telescopic shaft 1332 and the melting furnace 12 when the shielding cover 131 blocks the furnace opening of the melting furnace 12 when the telescopic shaft 1332 is directly connected to the main swing arm 1321. This ensures the safety and smoothness of the shielding assembly 13 throughout its entire stroke.
[0044] Furthermore, a sliding groove 1323 is provided on the auxiliary swing arm 1322. The transition shaft 134 passes through the sliding groove 1323 and slides along the sliding groove 1323. It should be understood that, through the guiding effect of the sliding groove 1323, the transition shaft 134 completes relative sliding along a preset path under the drive of the telescopic shaft 1332, smoothly converting the horizontal linear telescopic motion of the telescopic shaft 1332 into the rotational swing motion of the auxiliary swing arm 1322. At the same time, relying on the sufficient structural strength of the main swing arm 1321, deformation of the main swing arm 1321 due to insufficient structural strength can be effectively avoided, thereby preventing the cover 131 from shaking and colliding with the smelting furnace 12 during station switching and cover operation, ensuring the operational stability of the cover 131.
[0045] Furthermore, the swing arm unit 132 also includes a connecting portion 1324. There is a height difference between the main swing arm 1321 and the auxiliary swing arm 1322, which are connected via the connecting portion 1324. It should be understood that the vertical height difference between the main swing arm 1321 and the auxiliary swing arm 1322 creates a staggered layout, effectively preventing structural interference between the auxiliary swing arm 1322 and the cover 131 on the main swing arm 1321 during swinging. The connection between the main swing arm 1321 and the auxiliary swing arm 1322 via the connecting portion 1324 allows the main swing arm 1321 and the auxiliary swing arm 1322 to rotate synchronously and stably around the axis of the connecting portion 1324, improving the smoothness and operational reliability of the cover 131's position switching action.
[0046] Furthermore, the connecting part 1324 includes a connecting shaft 1325. The connecting shaft 1325 is vertically arranged and rotatably connected to the inner wall of the melting chamber 11, thereby stably limiting the installation of the swing arm unit 132 inside the melting chamber 11. It also provides stable radial support for the rotation of the connecting shaft 1325, preventing radial movement and structural swaying during the operation of the swing arm unit 132. The first axis is the axis of the connecting shaft 1325, ensuring that the main swing arm 1321 and the auxiliary swing arm 1322 rotate synchronously around the same rotation center, avoiding structural interference, movement jamming, and power loss caused by different axes of rotation of the two swing arms. The main swing arm 1321 and the auxiliary swing arm 1322 are fixedly connected to the connecting part 1324, ensuring no relative displacement between the main swing arm 1321, the auxiliary swing arm 1322, and the connecting shaft 1325. This significantly improves the overall structural rigidity of the swing arm unit 132, further ensuring the smoothness of the shielding cover 131's operation and the reliability of the shielding operation.
[0047] Furthermore, such as Figure 5 As shown, with the shielding cover 131 positioned at the top of the smelting furnace 12, the perpendicular line between the transition shaft 134 and the first axis is the first perpendicular line H1. The angle between the first perpendicular line H1 and the axis of the telescopic shaft 1332 is between 70° and 90°. It should be understood that when the shielding cover 131 is in the shielding position, the driving force output by the telescopic shaft 1332 acts on the lever arm of the swing arm unit 132 in a nearly vertical direction, maximizing the effective driving lever arm length, significantly improving the locking stability and smooth operation of the swing arm unit 132 in the shielding position, effectively preventing the shielding cover 131 from shaking or shifting position, preventing it from colliding and being damaged with the smelting furnace 12, and ensuring the stable shielding and protection effect of the shielding cover 131 on the top of the smelting furnace 12.
[0048] Furthermore, such as Figure 6As shown, the second perpendicular line H2 is perpendicular to the axis of the telescopic shaft 1332. The second perpendicular line H2 is located between the angle bisector C1 of the sector angle formed by the swing trajectory of the auxiliary swing arm 1322 and the first perpendicular line H1. The first perpendicular line H1 is an edge line of this sector angle. It should be understood that the second perpendicular line H2 is perpendicular to the axis of the telescopic shaft 1332, so that the linear driving force output by the telescopic shaft 1332 can be maximized into the rotational torque that drives the auxiliary swing arm 1322 to swing. At the same time, it can effectively shorten the sliding stroke of the transition shaft 134 in the sliding groove 1323 of the auxiliary swing arm 1322, thereby reducing the design length of the sliding groove 1323, avoiding the groove being too long and weakening the structural strength of the auxiliary swing arm 1322, and improving the overall structural rigidity and movement stability of the auxiliary swing arm 1322. The second vertical line H2 is located between the angle bisector C1 of the fan-shaped angle formed by the swing trajectory of the auxiliary swing arm 1322 and the first vertical line H1. By limiting the placement of the second vertical line H2, the driving force angle of the telescopic shaft 1332 is close to vertical when the auxiliary swing arm 1322 drives the shielding cover 131 to the end of the shielding position. This makes the swinging motion of the shielding cover 131 more stable, effectively avoiding impact and shaking when the shielding cover 131 reaches the position, preventing the shielding cover 131 from colliding and being damaged with the smelting furnace 12, and ensuring that the shielding cover 131 accurately stops at the preset shielding position, thus improving the reliability of the shielding operation.
[0049] In another embodiment, such as Figure 7As shown, the connecting part 1324 includes a first rotating shaft 1326, a second rotating shaft 1327, and a reduction module 1328. The first rotating shaft 1326 and the second rotating shaft 1327 are rotatably connected to the inner wall of the melting chamber 11, thereby providing independent radial support and rotational limit for the first rotating shaft 1326 and the second rotating shaft 1327, ensuring the coaxiality and stability of the rotational movement of the first rotating shaft 1326 and the second rotating shaft 1327, and preventing radial movement and structural swaying during rotation. The first rotating shaft 1326 and the second rotating shaft 1327 are connected by a reduction module 1328, realizing stable power transmission between the first rotating shaft 1326 and the second rotating shaft 1327, while simultaneously adjusting the conversion between speed and torque through the reduction module 1328. The rotational speed of the first rotating shaft 1326 is greater than that of the second rotating shaft 1327. Through the speed reduction and torque increase effect of the reduction module 1328, the rotational motion input by the auxiliary swing arm 1322 can be converted into a larger torque rotational motion output by the second rotating shaft 1327, significantly reducing the output load of the telescopic drive unit 133 and slowing down the movement speed of the main swing arm 1321 driving the cover 131. The auxiliary swing arm 1322 is fixedly connected to the first rotating shaft 1326, and the main swing arm 1321 is fixedly connected to the second rotating shaft 1327. This ensures that the power output by the telescopic drive unit 133 through the auxiliary swing arm 1322 is stably input to the first rotating shaft 1326. After being regulated by the reduction module 1328, it is synchronously transmitted to the main swing arm 1321 through the second rotating shaft 1327, realizing precise and stable control of the rotational motion of the cover 131. This effectively avoids the problem of impact shaking and collision with the smelting furnace 12 during the movement of the cover 131, while improving the positioning accuracy of the cover station and the reliability of the cover operation.
[0050] Example 2:
[0051] In this embodiment, a vacuum melting and casting device is provided, such as... Figure 8 As shown, the vacuum casting equipment includes a vacuum induction melting and heat preservation system 10, a mold slow cooling system 20, a feeding system 30, and a transfer system.
[0052] The mold slow cooling system 20 includes an entry chamber 21, a transition chamber 22, a holding chamber 23, and a slow cooling chamber 24. The entry chamber 21, transition chamber 22, and slow cooling chamber 24 are arranged horizontally in sequence, enabling linear continuous transfer of the mold shell unit, shortening the process flow, reducing temperature drop losses during transfer, and improving the overall efficiency of the casting process. The melting chamber 11 is located above the holding chamber 23, allowing the molten metal to be directly poured into the mold shell unit within the holding chamber 23 below, avoiding temperature drops and oxidation inclusions caused by long-distance metal transfer, and ensuring the quality of the casting.
[0053] The charging system 30 includes a charging chamber and a clamping assembly. The charging chamber is located above the melting chamber 11, and the clamping assembly is located inside the charging chamber. The clamping assembly is used to charge the furnace charge into the melting chamber 11, thereby stably clamping the furnace charge to be charged, accurately controlling the timing and position of the charge charge, avoiding splashing and deviation during the charge charge charging process, and ensuring the safety and stability of the melting operation.
[0054] The transfer system is used to carry the shell unit to move between the mold entry chamber 21, the transition chamber 22, the insulation chamber 23 and the slow cooling chamber 24, realize the automated and continuous transfer of the shell unit between the functional chambers, ensure the smooth flow of the shell unit between the pouring, insulation and slow cooling processes, greatly improve the automation level and operation efficiency of vacuum casting, and avoid problems such as vacuum environment damage and uncontrolled temperature drop of castings, thus ensuring the consistency and stability of casting quality.
[0055] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes can be made in form and detail without departing from the scope of this disclosure.
Claims
1. A vacuum induction melting and heat preservation system, characterized in that, The vacuum induction melting and heat preservation system includes: A melting chamber, wherein the side walls of the melting chamber are cylindrical; A smelting furnace, located within the smelting chamber; A shielding assembly is provided for shielding and avoiding the top of the smelting furnace. The shielding assembly includes a shielding cover, a swing arm unit, a telescopic drive unit, and a transition shaft. The telescopic drive unit is fixedly connected to the side wall of the smelting chamber. The telescopic drive unit includes a positioning cylinder and a telescopic shaft. The telescopic shaft slides through the positioning cylinder. The positioning cylinder is located outside the smelting chamber. The telescopic shaft slides through the smelting chamber. The axis of the telescopic drive unit is horizontally oriented. The shielding cover and the swing arm unit are located inside the smelting furnace. The swing arm unit is rotatably connected to the inner side wall of the smelting chamber about a first axis. The shielding cover is connected to the swing arm unit. The first axis is vertically oriented. The telescopic shaft is rotatably connected to the swing arm unit via the transition shaft. The transition shaft is slidably connected to the swing arm unit. The perpendicular line from the connection point of the telescopic drive unit to the side wall of the smelting chamber to the axis of the smelting chamber is a first normal line. The angle between the axis of the telescopic drive unit and the first normal line is less than 45°.
2. The vacuum induction melting and heat preservation system according to claim 1, characterized in that, The distance between the center of the shielding cover and the first axis is the first distance; the distance between the transition axis and the first axis is the second distance; the ratio of the second distance to the first distance is greater than or equal to 0.
5.
3. The vacuum induction melting and heat preservation system according to claim 2, characterized in that, The smelting furnace is located at the center of the smelting chamber; the swing arm unit includes a main swing arm and a secondary swing arm; the main swing arm is connected to the secondary swing arm; the telescopic shaft is rotatably connected to the secondary swing arm through the transition shaft; the transition shaft is slidably connected to the secondary swing arm; in the swing trajectory of the secondary swing arm, there is a gap between the transition shaft and the axis of the smelting chamber.
4. The vacuum induction melting and heat preservation system according to claim 3, characterized in that, The auxiliary swing arm is provided with a sliding groove; the transition shaft passes through the sliding groove; the transition shaft slides along the sliding groove.
5. A vacuum induction melting and heat preservation system according to claim 3, characterized in that, The swing arm unit further includes a connecting part; there is a height difference between the main swing arm and the auxiliary swing arm; the main swing arm and the auxiliary swing arm are connected through the connecting part.
6. The vacuum induction melting and heat preservation system according to claim 5, characterized in that, The connecting part includes a connecting shaft; the connecting shaft is vertically arranged; the connecting shaft is rotatably connected to the inner wall of the melting chamber; the first axis is the axis of the connecting shaft; the main swing arm and the auxiliary swing arm are respectively fixedly connected to the connecting part.
7. A vacuum induction melting and heat preservation system according to claim 6, characterized in that, With the shielding cover positioned at the top of the smelting furnace, the perpendicular line between the transition shaft and the first axis is the first perpendicular line; the angle between the first perpendicular line and the axis of the telescopic shaft is between 70° and 90°.
8. A vacuum induction melting and heat preservation system according to claim 7, characterized in that, The second perpendicular line is perpendicular to the axis of the telescopic shaft; the second perpendicular line is located between the angle bisector of the sector angle formed by the swing trajectory of the auxiliary swing arm and the first perpendicular line.
9. A vacuum induction melting and heat preservation system according to claim 5, characterized in that, The connecting part includes a first rotating shaft, a second rotating shaft, and a reduction module; the first rotating shaft and the second rotating shaft are respectively rotatably connected to the inner wall of the melting chamber; the first rotating shaft and the second rotating shaft are connected by transmission through the reduction module; the rotational speed of the first rotating shaft is greater than the rotational speed of the second rotating shaft; the auxiliary swing arm is fixedly connected to the first rotating shaft; the main swing arm is fixedly connected to the second rotating shaft.
10. A vacuum casting equipment, characterized in that, The vacuum casting equipment includes: The vacuum induction melting and heat preservation system as described in any one of claims 1-9; A slow cooling system for casting molds, comprising a mold-feeding chamber, a transition chamber, a holding chamber, and a slow cooling chamber; the mold-feeding chamber, the transition chamber, and the slow cooling chamber are arranged sequentially in a horizontal direction; the melting chamber is located above the holding chamber. A charging system, comprising a charging chamber and a clamping assembly; the charging chamber is located above the melting chamber; the clamping assembly is located inside the charging chamber; the clamping assembly is used to charge furnace materials into the melting chamber; A transfer system is provided for moving the shell unit within the molding chamber, the transition chamber, the insulation chamber, and the slow cooling chamber.