Vacuum melting furnace for magnesium-lithium alloy processing

Abstract

The invention belongs to the technical field of vacuum melting furnaces, and particularly relates to a vacuum melting furnace for magnesium-lithium alloy processing, which comprises a furnace body, a feeding assembly is assembled at the top of the furnace body, a heating mechanism is arranged in an inner cavity of the furnace body, a sealing door is arranged at the end part of the furnace body, and a stand column is fixedly connected to the bottom of the furnace body. The bottom of the furnace body is fixedly connected with two rectangular pipes, the rectangular pipes extend into the furnace body, sealing plates are arranged in the rectangular pipes, the bottom of the furnace body is fixedly connected with a support, the bottom of the support is fixedly connected with a first electric push rod, and the output end of the first electric push rod is fixedly connected with the sealing plates. A mold is arranged on the sealing plate, a sealing assembly is arranged on the top of the rectangular pipe, and a pushing assembly is further arranged on the side wall of the furnace body. Different molds can be replaced under the condition that the vacuum melting furnace is closed, and meanwhile, the vacuum environment in the melting furnace is ensured, so that a solution is conveniently poured into the multiple molds.

Description

Technical Field

[0001] The present invention belongs to the technical field of vacuum melting furnaces, and in particular relates to a vacuum melting furnace for processing magnesium-lithium alloys. Background Art

[0002] Vacuum melting furnaces primarily melt metals through eddy currents generated by electromagnetic induction. Heating and melting magnesium-lithium alloys in a vacuum or protective atmosphere prevents oxidation and impurities from entering the alloy, precisely controlling its chemical composition and improving its purity.

[0003] After the material is melted in the existing vacuum melting furnace, the solution is usually poured into the mold directly inside the melting furnace. After the solution in the mold cools down, the melting furnace is opened to take it out.

[0004] With this operation method, the solution can only be poured into one mold at a time. If there is too much solution and the mold is too small, the solution needs to be poured into multiple molds multiple times. The process is cumbersome and complicated, and the melting furnace needs to be opened continuously, which affects the internal vacuum environment. It is impossible to change the mold without opening the vacuum melting furnace. Summary of the Invention

[0005] The purpose of the present invention is to provide a vacuum melting furnace for magnesium-lithium alloy processing, which can replace different molds when the vacuum melting furnace is closed, while ensuring the vacuum environment inside the melting furnace, so as to facilitate pouring the solution into multiple molds.

[0006] The technical solutions adopted by the present invention are as follows:

[0007] A vacuum melting furnace for magnesium-lithium alloy processing, comprising a furnace body, a feeding assembly assembled on the top of the furnace body, a heating mechanism provided in the inner cavity of the furnace body, a sealed door provided at the end of the furnace body, a column fixedly connected to the bottom of the furnace body, two rectangular tubes fixedly connected to the bottom of the furnace body, the rectangular tubes extending into the interior of the furnace body, a sealing plate provided in the rectangular tubes, a bracket fixedly connected to the bottom of the furnace body, a first electric push rod fixedly connected to the bottom of the bracket, an output end of the first electric push rod fixedly connected to the sealing plate, a mold provided on the sealing plate, a sealing assembly provided on the top of the rectangular tube, and a pushing assembly provided on the side wall of the furnace body.

[0008] The sealing assembly includes a mounting plate fixedly connected to the side wall of the rectangular tube near the top, the side wall of the mounting plate is rotatably connected to a rotating shaft, the side wall of the rotating shaft is fixedly connected to a sealing plate, and when the sealing plate is in an initial state, the angle between the sealing plate and the top of the rectangular tube is greater than 90°, and the side wall of the sealing plate is provided with a secondary seal and a linkage assembly.

[0009] The secondary seal comprises a sealing ring fixedly connected to the side wall of the sealing plate close to the rectangular tube. A sealing groove is provided on the top end face of the rectangular tube. The sealing ring and the sealing groove are adapted to each other.

[0010] The linkage assembly includes a first gear fixedly connected to the side wall of the rotating shaft, a second gear rotatably connected to the side wall of the rectangular tube near the top end and meshing with the first gear, a rack meshing with one side of the second gear, a transmission plate fixedly connected to the bottom end of the rack, the transmission plate is L-shaped, a support plate fixedly connected to the side wall of the rectangular tube, the rack passes through the support plate and is movably connected to the support plate, and an elastic transmission member is provided on the lower side of the transmission plate.

[0011] The elastic transmission part includes a movable cylinder arranged on one side of the rectangular tube, the movable cylinder is U-shaped, one end of the movable cylinder extends into the rectangular tube and is located on the lower side of the sealing plate, a vertical rod is movably connected inside the movable cylinder, the top end of the vertical rod passes through the movable cylinder and is fixedly connected to a pressure plate, the pressure plate is located on the transmission plate, and the side wall of the vertical rod is located in the movable cylinder and is sleeved with a spring.

[0012] The pushing assembly includes a second electric push rod fixedly mounted on the end surface of the furnace body, an output end of the second electric push rod extends into the furnace body and is fixedly connected to a push plate, and the push plate is located on the upper side of the rectangular tube.

[0013] The top surface of the sealing plate on the left is fixedly connected to a limiting plate, the limiting plate is U-shaped, and the opening direction of the limiting plate faces the rectangular tube on the right.

[0014] The side of the sealing plate is equipped with a plurality of sealing pads, and the sealing pads are against the inner wall of the rectangular tube.

[0015] The technical effects achieved by the present invention are:

[0016] A vacuum melting furnace for magnesium-lithium alloy processing of the present invention can replace different molds when the furnace body is closed, while ensuring the vacuum environment inside the melting furnace through the mutual cooperation between the furnace body, rectangular tube, sealing plate, sealing assembly and linkage assembly, so as to facilitate pouring the solution into multiple molds. There is no need to wait for the melting furnace to break the vacuum, cool down, and then re-vacuum and heat up, etc., and the mold can be directly replaced for the next casting, which greatly shortens the production cycle and improves the utilization rate of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a perspective view of the present invention;

[0018] Figure 2 It is a schematic cross-sectional view of the present invention;

[0019] Figure 3 It is a partial structural schematic diagram of the present invention;

[0020] Figure 4 The present invention Figure 3 Schematic diagram of the rear view structure;

[0021] Figure 5 This is a structural schematic diagram of the present invention in which the blocking plate is in an open state;

[0022] Figure 6 It is a structural schematic diagram of the elastic transmission member of the present invention;

[0023] Figure 7 It is a structural schematic diagram of the sealing plate of the present invention;

[0024] Figure 8 This invention Figure 4 A magnified view of point A in the figure;

[0025] Figure 9 This invention Figure 6 Enlarged view of point B in .

[0026] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0027] 1. Furnace body; 2. Feeding assembly; 3. Heating mechanism; 4. Column; 5. Rectangular tube; 6. Sealing plate; 7. Bracket; 8. First electric push rod; 9. Mold; 10. Sealing plate; 11. Mounting plate; 12. Rotating shaft; 13. Sealing ring; 14. Sealing groove; 15. First gear; 16. Second gear; 17. Rack; 18. Transmission plate; 19. Movable cylinder; 20. Vertical rod; 21. Spring; 22. Pressure plate; 23. Sealing gasket; 24. Limiting plate; 25. Second electric push rod; 26. Push plate. DETAILED DESCRIPTION

[0028] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is described in detail below with reference to the following examples. It should be understood that the following text is only used to describe one or more specific embodiments of the present invention and does not strictly limit the scope of protection of the present invention.

[0029] like Figures 1-9As shown, a vacuum melting furnace for magnesium-lithium alloy processing includes a furnace body 1, a charging assembly 2 is assembled on the top of the furnace body 1, a heating mechanism 3 is arranged in the inner cavity of the furnace body 1, a sealing door is arranged at the end of the furnace body 1, and a column 4 is fixedly connected to the bottom of the furnace body 1. The above structures are all existing mature technologies, and the vacuum melting furnace also includes other functional structures, which will not be described one by one in this scheme. Two rectangular tubes 5 are fixedly connected to the bottom of the furnace body 1. The rectangular tubes 5 extend into the interior of the furnace body 1. A sealing plate 6 is arranged inside the rectangular tubes 5. A bracket 7 is fixedly connected to the bottom of the furnace body 1. A first electric push rod 8 is fixedly connected to the bottom of the bracket 7. The output end of the first electric push rod 8 is fixedly connected to the sealing plate 6. A mold 9 is arranged on the sealing plate 6. A sealing assembly is arranged on the top of the rectangular tube 5. A pushing assembly is also arranged on the side wall of the furnace body 1.

[0030] like Figure 6 and Figure 8 As shown, the sealing assembly includes a mounting plate 11 fixedly connected to the side wall of the rectangular tube 5 near the top. The side wall of the mounting plate 11 is rotatably connected to a rotating shaft 12. The side wall of the rotating shaft 12 is fixedly connected to a sealing plate 10. In the initial state, the angle between the sealing plate 10 and the top of the rectangular tube 5 is greater than 90 degrees. The side wall of the sealing plate 10 is provided with a secondary seal and a linkage assembly. The sealing assembly ensures that the sealing plate 10 can be tightly fitted with the end face of the rectangular tube 5 when the mold 9 is removed and placed, ensuring its sealing performance and preventing pressure leakage within the furnace body 1 from affecting its internal environment.

[0031] like Figure 5 As shown, the secondary seal includes a sealing ring 13 fixedly connected to the side wall of the sealing plate 10 close to the rectangular tube 5. A sealing groove 14 is opened on the top end surface of the rectangular tube 5, and the sealing ring 13 and the sealing groove 14 are adapted to each other.

[0032] Specifically, the sealing ring 13 can be made of any of the following materials:

[0033] Fluororubber sealing ring: It has excellent high temperature resistance and chemical corrosion resistance, can withstand high temperatures and erosion by various chemicals, and is suitable for parts in vacuum melting furnaces that may be exposed to corrosive gases or high temperature environments;

[0034] Copper sealing ring: It has good electrical and thermal conductivity, and has a certain degree of flexibility. It can maintain good sealing performance at high temperatures. It is often used in vacuum melting furnaces with high sealing requirements and high temperatures.

[0035] Stainless steel sealing ring: It has high strength, corrosion resistance and high temperature resistance, can adapt to the harsh working environment of vacuum melting furnace, is not easy to rust and deform, and is a more commonly used metal sealing ring material in vacuum melting furnace;

[0036] Graphite sealing ring: It has good high temperature resistance, wear resistance and self-lubricating properties. It can maintain a stable sealing effect in a vacuum environment. It is especially suitable for high temperature and high speed friction occasions. It can be used to seal the rotating shaft or sliding parts of the vacuum melting furnace.

[0037] like Figure 6 As shown, the linkage assembly includes a first gear 15 fixedly connected to the side wall of the rotating shaft 12, and a second gear 16 meshing with the first gear 15 is rotatably connected to the side wall of the rectangular tube 5 near the top. A rack 17 is meshed with one side of the second gear 16, and a transmission plate 18 is fixedly connected to the bottom end of the rack 17. The transmission plate 18 is L-shaped, and a support plate is fixedly connected to the side wall of the rectangular tube 5. The rack 17 passes through the support plate and is movably connected to it. An elastic transmission member is provided on the lower side of the transmission plate 18.

[0038] like Figure 9 As shown, the elastic transmission member includes a movable cylinder 19 arranged on one side of the rectangular tube 5. The movable cylinder 19 is U-shaped. One end of the movable cylinder 19 extends into the rectangular tube 5 and is located on the lower side of the sealing plate 6. A vertical rod 20 is movably connected inside the movable cylinder 19. The top end of the vertical rod 20 passes through the movable cylinder 19 and is fixedly connected to a pressure plate 22. The pressure plate 22 is located on the transmission plate 18. The side wall of the vertical rod 20 is located in the movable cylinder 19 and is sleeved with a spring 21.

[0039] Specifically, the linkage assembly is used in conjunction with the elastic transmission member, mainly utilizing the position difference generated when the sealing plate 6 is raised and lowered, thereby driving the sealing plate 10 to seal the rectangular tube 5, thereby playing a sealing role, so as to facilitate the replacement of the mold 9; by realizing the rapid conversion of the mold 9, there is no need to wait for the tedious process of re-vacuuming the melting furnace, and the next round of melting and pouring operations can be carried out immediately, which greatly shortens the time of the entire production process and increases the output per unit time; and ensures the continuous operation of the melting furnace, reduces the equipment downtime caused by the replacement of the mold 9, makes the production process smoother, and improves the utilization rate of the equipment.

[0040] In addition, controlling the stability of the internal environment of the furnace body 1 is an important step. Since it does not affect the vacuum environment in the smelting furnace, the process parameters such as temperature and vacuum degree in each smelting process can be kept stable, which is conducive to accurately controlling the smelting quality of the magnesium-lithium alloy and reducing problems such as component segregation and oxidation caused by environmental changes, thereby improving the consistency and performance stability of the product.

[0041] like Figure 1 and Figure 2 As shown, the pushing assembly includes a second electric push rod 25 fixedly mounted on the end surface of the furnace body 1 , the output end of the second electric push rod 25 extends into the furnace body 1 and is fixedly connected to a push plate 26 , which is located on the upper side of the rectangular tube 5 .

[0042] Among them, the main function of the right rectangular tube 5 is to place the empty mold 9. During the casting process of the left mold 9 or after the casting is completed, the operator can quickly place the empty mold 9 on the right sealing plate 6. After the cast mold 9 is discharged, the pushing assembly can be used to push the empty mold 9 onto the left sealing plate 6, omitting the steps of frequently moving the mold 9, thereby effectively improving its use efficiency.

[0043] like Figure 7 As shown, the top surface of the left sealing plate 6 is fixedly connected to a limit plate 24. The limit plate 24 is U-shaped, and the opening direction of the limit plate 24 faces the right rectangular tube 5. The limit plate 24 is used to limit the position of the mold 9. When the empty mold 9 on the right side is pushed to the left, the limit plate 24 can be used to position it to prevent deviation when pouring the solution.

[0044] like Figure 7 As shown, the sealing plate 6 is equipped with a plurality of sealing pads 23 on the side, and the sealing pads 23 are against the inner wall of the rectangular tube 5. They are used to strengthen the sealing performance between the rectangular tube 5 and the material can be any of the above-mentioned materials to ensure the sealing performance.

[0045] The working principle of the present invention is as follows: the magnesium-lithium alloy material is placed in the crucible and placed inside the heating mechanism 3 for heating and melting. When the molten magnesium-lithium alloy material solution needs to be poured into the mold 9, the first electric push rod 8 on the left side is started to drive the left sealing plate 6 to move downward. During the descending process, the sealing plate 6 cooperates with the force of the sealing gasket 23 to maintain the vacuum pressure state inside the furnace body 1. When the sealing plate 6 descends to a certain extent, it abuts against the end of the movable cylinder 19 and drives the movable cylinder 19 to move downward. The movable cylinder 19 drives the pressing plate 22 to move downward through the vertical rod 20. The pressing plate 22 presses the transmission plate 18 and drives the rack 17 to move downward. The rack 17 moves downward and engages the second gear 16 to rotate. The second gear 16 engages the first gear 15 to drive it to reverse. The first gear 15 drives the sealing plate 10 to flip toward the end face of the rectangular tube 5 through the rotating shaft 12, so that the sealing plate 10 covers the top of the rectangular tube 5. At the same time, the sealing ring 13 is stuck in the sealing groove 14 to achieve sealing of the rectangular tube 5.

[0046] At the same time, the sealing plate 6 continues to move downward. Since the sealing plate 10 is against the end face of the rectangular tube 5, the rack 17 is in the extreme descending state, the sealing plate 6 squeezes the movable cylinder 19, and the movable cylinder 19 descends and compresses the spring 21, so that the movable cylinder 19 is squeezed and moved downward along the vertical rod 20. At the same time, the sealing plate 6 is separated from the rectangular tube 5 and exposed. Then the mold 9 is placed on the sealing plate 6, and the first electric push rod 8 drives the sealing plate 6 to rise. When the sealing plate 6 enters the rectangular tube 5, it starts to seal. When the sealing plate 6 rises to the corresponding position, the force of the spring 21 is used to start driving the rack 17 upward, so that the sealing plate 10 is reset and is in the open state. After the mold 9 rises to the top of the rectangular tube 5, it reaches a suitable position and the solution in the crucible is poured into the mold 9.

[0047] At the same time, the first electric push rod 8 on the other side can be operated to place another mold 9 on the right sealing plate 6, and drive the right sealing plate 6 to rise into the interior of the furnace body 1 to be determined. When the solution in the left mold 9 is poured, the left first electric push rod 8 transports it downward, and after taking out the left mold 9, the sealing plate 6 rises to the position for pouring the solution. At this time, the right sealing plate 6 synchronously pushes the empty mold 9 upward to the appropriate position, and then starts the second electric push rod 25. The second electric push rod 25 pushes the empty mold 9 into the inner side of the limit plate 24 on the left sealing plate 6 through the push plate 26, and continues to pour the solution to achieve the purpose of continuous operation.

[0048] The foregoing is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained herein shall, unless otherwise specified or limited, be implemented in accordance with conventional means in the art.

Claims

1. A vacuum melting furnace for magnesium-lithium alloy processing, comprising a furnace body (1), a charging assembly (2) assembled on the top of the furnace body (1), a heating mechanism (3) arranged in the inner cavity of the furnace body (1), a sealing door arranged at the end of the furnace body (1), and a column (4) fixedly connected to the bottom of the furnace body (1), characterized in that: Two rectangular tubes (5) are fixedly connected to the bottom of the furnace body (1), the rectangular tubes (5) extend into the interior of the furnace body (1), a sealing plate (6) is provided in the rectangular tubes (5), a bracket (7) is fixedly connected to the bottom of the furnace body (1), a first electric push rod (8) is fixedly connected to the bottom of the bracket (7), an output end of the first electric push rod (8) is fixedly connected to the sealing plate (6), a mold (9) is provided on the sealing plate (6), a sealing assembly is provided on the top of the rectangular tube (5), and a pushing assembly is also provided on the side wall of the furnace body (1).

2. The vacuum melting furnace for magnesium-lithium alloy processing according to claim 1, characterized in that: The sealing assembly comprises a mounting plate (11) fixedly connected to the side wall of the rectangular tube (5) near the top end, the side wall of the mounting plate (11) being rotatably connected to a rotating shaft (12), the side wall of the rotating shaft (12) being fixedly connected to a blocking plate (10), and when the blocking plate (10) is in an initial state, the angle between the blocking plate (10) and the top end of the rectangular tube (5) is greater than 90°, and the side wall of the blocking plate (10) is provided with a secondary sealing member and a linkage assembly.

3. The vacuum melting furnace for magnesium-lithium alloy processing according to claim 2, characterized in that: The secondary seal comprises a sealing ring (13) fixedly connected to the side wall of the sealing plate (10) close to the rectangular tube (5); a sealing groove (14) is provided on the top end surface of the rectangular tube (5); and the sealing ring (13) and the sealing groove (14) are adapted to each other.

4. The vacuum melting furnace for magnesium-lithium alloy processing according to claim 2, characterized in that: The linkage assembly comprises a first gear (15) fixedly connected to the side wall of the rotating shaft (12); a second gear (16) meshing with the first gear (15) is rotatably connected to the side wall of the rectangular tube (5) near the top; a rack (17) is meshed on one side of the second gear (16); a transmission plate (18) is fixedly connected to the bottom end of the rack (17); the transmission plate (18) is L-shaped; a support plate is fixedly connected to the side wall of the rectangular tube (5); the rack (17) passes through the support plate and is movably connected thereto; and an elastic transmission member is provided on the lower side of the transmission plate (18).

5. The vacuum melting furnace for magnesium-lithium alloy processing according to claim 4, characterized in that: The elastic transmission member comprises a movable cylinder (19) arranged on one side of the rectangular tube (5), the movable cylinder (19) being U-shaped, one end of the movable cylinder (19) extending into the rectangular tube (5) and being located on the lower side of the sealing plate (6), a vertical rod (20) being movably connected in the movable cylinder (19), the top end of the vertical rod (20) passing through the movable cylinder (19) and being fixedly connected to a pressure plate (22), the pressure plate (22) being located on the transmission plate (18), and a side wall of the vertical rod (20) being located in the movable cylinder (19) and being sleeved with a spring (21).

6. The vacuum melting furnace for magnesium-lithium alloy processing according to claim 1, characterized in that: The pushing assembly comprises a second electric push rod (25) fixedly mounted on the end surface of the furnace body (1); the output end of the second electric push rod (25) extends into the furnace body (1) and is fixedly connected to a push plate (26); the push plate (26) is located on the upper side of the rectangular tube (5).

7. The vacuum melting furnace for magnesium-lithium alloy processing according to claim 1, characterized in that: The top surface of the sealing plate (6) on the left side is fixedly connected to a limiting plate (24), the limiting plate (24) is U-shaped, and the opening direction of the limiting plate (24) faces the rectangular tube (5) on the right side.

8. The vacuum melting furnace for magnesium-lithium alloy processing according to claim 1, characterized in that: The side of the sealing plate (6) is equipped with a plurality of sealing pads (23), and the sealing pads (23) are against the inner wall of the rectangular tube (5).

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