Magnesium-based composite material smelting device

Abstract

The utility model discloses a magnesium-based composite material smelting device. The magnesium-based composite material smelting device comprises a smelting crucible, a heating unit, a stirring mechanism, an ultrasonic vibration generator and a driving unit, an opening and an upper cover for sealing the opening are arranged at the top of the smelting crucible; the stirring mechanism comprises a stirring shaft, a stirring head mounted at the lower end of the stirring shaft and a driving motor, and the driving motor is used for driving the stirring shaft to rotate so that the stirring head can stir the magnesium alloy in a molten state in the smelting crucible; the ultrasonic vibration generator comprises a machine body and a vibration head connected to the lower end of the machine body and extending downwards. The driving unit is used for driving the stirring mechanism and the ultrasonic vibration generator to move up and down in the height direction and transversely move in the horizontal direction so that the stirring head and the vibration head can stretch into the smelting crucible. According to the utility model, reinforcement particles can be fully and uniformly mixed with the magnesium alloy, defects such as bubbles in the magnesium alloy are reduced, and the compactness and particle dispersion uniformity of the magnesium-based composite material are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of metal material processing, and particularly relates to a melting device for magnesium-based composites. Background Art

[0002] In order to improve the elastic modulus and strength of magnesium alloys, reinforcing particles (such as ceramic particles, heterogeneous metal particles, etc.) are usually added to magnesium alloys to prepare magnesium-based composites, thereby expanding the application range of magnesium alloys.

[0003] Melting is an important process for preparing magnesium-based composites. During the melting process, magnesium alloy is added into a melting crucible, and the magnesium alloy is melted by high-temperature heating. Then, reinforcing particles are put in, and the reinforcing particles are uniformly mixed into the magnesium alloy through a mechanical stirring structure. When the stirring structure of the existing melting device stirs the magnesium alloy, air bubbles are easily generated inside the magnesium alloy, and finally there are defects such as pores in the formed magnesium-based composites, resulting in low density and poor mechanical properties of the materials. Summary of the Utility Model

[0004] The main purpose of the utility model is to propose a melting device for magnesium-based composites, which can make the reinforcing particles uniformly distributed in the magnesium-based composites and improve the density of the magnesium-based composites.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A melting device for magnesium-based composites includes a melting crucible, a heating unit for heating the melting crucible, a stirring mechanism, an ultrasonic vibration generator, and a driving unit;

[0007] The top of the melting crucible is provided with an opening and an upper cover for covering the opening;

[0008] The stirring mechanism includes a stirring shaft, a stirring head installed at the lower end of the stirring shaft, and a driving motor for driving the stirring shaft to rotate so that the stirring head can stir the molten magnesium alloy inside the melting crucible;

[0009] The ultrasonic vibration generator includes a body and a vibration head connected to the lower end of the body and extending downward;

[0010] The driving unit is used to drive the stirring mechanism and the ultrasonic vibration generator to move up and down in the height direction and horizontally in the horizontal direction, so that the stirring head and the vibration head can respectively extend into the melting crucible.

[0011] Preferably, the upper cover is provided with a through hole for the stirring shaft and the vibration head to pass through, and an avoidance groove. The through hole is arranged in the middle of the upper cover, and the avoidance groove extends inward from the edge of the upper cover to be connected with the through hole. The upper cover is also provided with a sealing plate, which is movably connected to the upper cover to move between a first position of the sealing avoidance groove and a second position offset from the avoidance groove.

[0012] Preferably, an arc-shaped guide groove is provided on the upper surface edge of the upper cover, and the outer side of the sealing plate is slidably embedded in the guide groove. The sealing cover can be rotatably matched with the upper cover so that the outer side of the sealing plate can slide along the extension direction of the guide groove.

[0013] Preferably, the periphery of the through hole is provided with a protrusion extending upward, the outer edge surface of the protrusion is arc-shaped, the inner side edge of the sealing plate forms an arc that matches the shape of the outer edge surface of the protrusion so that the seal abuts against the outer edge surface of the protrusion and can rotate around the protrusion, the edge of the upper cover is provided with a first rib extending upward, and the inner side of the first rib is provided with a second rib extending toward the middle of the upper cover, and the guide groove is surrounded by the first rib, the second rib and the upper surface of the upper cover.

[0014] Preferably, a joint is provided on the upper cover, the inner end of the joint is connected to the inner cavity of the melting crucible, and the outer end of the joint is used to connect to an external protective gas source to transport protective gas to the inner cavity of the melting crucible.

[0015] Preferably, the upper cover is also provided with a thermocouple extending into the inner cavity of the smelting crucible to detect the temperature inside the smelting crucible.

[0016] Preferably, the driving unit includes a mounting frame and a two-axis driving mechanism, the base of the driving motor and the body of the ultrasonic vibration generator are fixedly connected to the mounting frame, and the driving end of the two-axis driving mechanism is connected to the mounting frame.

[0017] Preferably, the heating unit is an electric heating induction coil wound around the outside of the smelting crucible.

[0018] In the utility model, the liquid magnesium alloy in the melting crucible is fully stirred by a stirring mechanism, so that the added reinforcement particles can be fully mixed with the magnesium alloy to ensure uniform distribution of the reinforcement particles. After the stirring is completed, the magnesium alloy is vibrated at a high frequency by the vibration head of the ultrasonic vibration generator to eliminate bubbles generated in the liquid magnesium alloy due to stirring or other reasons, thereby improving the density of the magnesium-based composite material. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0020] Figure 1 is a schematic structural diagram of the present invention;

[0021] Figure 2 is Figure 1 an enlarged view of part A in

[0022] Figure 3 is a schematic diagram of a state of the upper cover of the present invention;

[0023] Figure 4 is a schematic diagram of a working state of the present invention;

[0024] Figure 5 is a schematic diagram of another working state of the present invention.

[0025] The realization of the purpose, functional features and advantages of the present invention will be further described in conjunction with the embodiments with reference to the drawings. Detailed implementation manners

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0027] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If this specific posture changes, the directional indications will also change accordingly.

[0028] In addition, the descriptions involving "first", "second", etc. in the present utility model are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. Additionally, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0029] As Figure 1 , 2 , 3, 4, and 5 show a magnesium-based composite material melting device of the present utility model, which includes a melting crucible 10, an electrothermal induction coil 20, a stirring mechanism 30, an ultrasonic vibration generator 40, and a driving unit; an opening is provided at the top of the melting crucible 10, and an upper cover 50 for covering the opening, the electrothermal induction coil 20 surrounds the outer periphery of the melting crucible 10, and after being energized, the electrothermal induction coil 20 can heat the melting crucible 10 to make the internal temperature of the melting crucible 10 meet the melting temperature of the magnesium alloy. The stirring mechanism 30 includes a stirring shaft 31, a stirring head 32 installed at the lower end of the stirring shaft 31, and a driving motor 33. The rotating shaft of the driving motor 33 is connected to the upper end of the stirring shaft 31, which can drive the stirring shaft 31 to rotate, and then drive the stirring head 32 to rotate. The ultrasonic vibration generator 40 includes a body 41 and a vibration head 42 connected to the lower end of the body 41 and extending downward. The driving unit is used to drive the stirring mechanism 30 and the ultrasonic vibration generator 40 to move up and down in the height direction and translate in the horizontal direction, so that the stirring head 32 of the stirring mechanism 30 can extend into the inner cavity of the melting crucible 10 and the vibration head 42 of the ultrasonic vibration generator 40 can extend into the inner cavity of the melting crucible 10.

[0030] During operation, place the magnesium alloy in the melting crucible 10, turn on the power of the electrothermal induction coil 20, heat the inside of the melting crucible 10 to a predetermined temperature to melt the magnesium alloy, then put the reinforcing particles into the inside of the melting crucible 10, the driving unit drives the stirring mechanism 30 to translate above the melting crucible 10, and then drives the stirring mechanism 30 to descend. As Figure 4 shown, make the stirring head 32 located inside the melting crucible 10, start the driving motor 33, drive the stirring head 32 to stir the molten magnesium alloy. After sufficient stirring to mix the reinforcing particles evenly in the magnesium alloy, the driving unit drives the stirring head 32 to move out of the melting crucible 10 and drives the vibration head 42 of the ultrasonic vibration generator 40 to move into the melting crucible 10. As Figure 5As shown, the ultrasonic vibration generator 40 is started, and the vibration head 42 vibrates at a high frequency inside the magnesium alloy. The bubbles generated inside the magnesium alloy during the stirring process are eliminated by the high frequency vibration of the vibration head 42 inside the magnesium alloy. After the vibration is completed, the power supply of the electric heating induction coil 20 is turned off, and the magnesium-based composite material is obtained after the melting crucible 10 is cooled.

[0031] In the utility model, the liquid magnesium alloy in the melting crucible is fully stirred by a stirring mechanism, so that the added reinforcement particles can be fully mixed with the magnesium alloy to ensure uniform distribution of the reinforcement particles. After the stirring is completed, the magnesium alloy is vibrated at a high frequency by the vibration head of the ultrasonic vibration generator to eliminate bubbles generated in the liquid magnesium alloy due to stirring or other reasons, thereby improving the density of the magnesium-based composite material.

[0032] In a preferred embodiment, an avoidance structure is provided on the upper cover 50, so that the driving unit can successively drive the stirring head 32 and the vibration head 42 to enter the interior of the melting crucible 10, ensuring that the upper cover 50 can better cover the opening at the top of the melting crucible 10 during the stirring and vibration process. Specifically, the upper cover 50 is provided with a through hole 51 for the stirring shaft 31 and the vibration head 42 to pass through, and an avoidance groove 52. The through hole 51 is provided in the middle of the upper cover 50, and its inner diameter size is configured to just accommodate the stirring shaft 31 and the vibration head 42. The avoidance groove 52 extends inward from the edge of the upper cover 50 to communicate with the through hole 51. A sealing plate 53 is also provided on the upper cover 50, and the sealing plate 53 is movably connected to the upper cover 50. Moving the sealing plate 53 can make the sealing plate 53 move between a first position of covering the avoidance groove 52 and a second position staggered from the avoidance groove 52. When in use, the stirring shaft 31 and the vibration head 42 can be embedded in the interior of the melting crucible 10, such as Figure 1 As shown, the sealing plate 53 is moved to the second position, the upper cover 50 is moved so that the stirring shaft 31 or the vibration head 42 is embedded in the avoidance groove 52 from the outer edge of the avoidance groove 52, and the upper cover 50 is moved so that the stirring shaft 31 or the vibration head 42 is located at the through hole 51. After the upper cover 50 is sealed on the opening at the top of the melting crucible 10, the sealing plate 53 is moved to the first position, that is, Figure 2In the state shown, the upper cover 50 and the sealing plate 53 thereon can completely cover the opening at the top of the melting crucible 10, and ensure that the stirring head 32 and the vibration head 42 can be normally embedded in the inner cavity of the melting crucible 10. The upper surface edge of the upper cover 50 is provided with an arc-shaped guide groove 57, and the outer side of the sealing plate 53 is slidably embedded in the guide groove 57. The sealing plate 53 and the upper cover 50 are rotatably matched, so that the sealing plate 53 can slide along the extension direction of the guide groove 57. A protrusion 56 extending upward is provided on the periphery of the through hole 51, and the outer edge surface of the protrusion 56 is arc-shaped. The inner side edge of the sealing plate 53 forms an arc-shaped structure, which matches the outer edge surface of the protrusion 56, so that the inner side edge of the sealing plate 53 abuts against the outer edge surface of the protrusion 56 and enables the sealing plate 53 to rotate around the protrusion 56. A first rib 501 extending upward is provided on the edge of the upper cover 50, and a second rib 502 extending toward the middle of the upper cover 50 is provided on the inner side of the first rib 501. The above-mentioned guide groove 57 is surrounded by the first rib 501, the second rib 502 and the upper surface of the upper cover 50. In this way, the opening of the guide groove 57 is directed toward the middle of the upper cover 50. After the edge of the sealing plate 53 is embedded in the guide groove 57, the guide groove 57 is used to guide the rotation of the sealing plate 53, and at the same time, the sealing plate 53 is prevented from moving upward to avoid the sealing plate 53 from separating from the upper cover 50.

[0033] Different from the above structure in which the sealing plate 53 is rotatably mounted on the upper cover 50, in other embodiments, the sealing plate 53 may be mounted on the upper cover 50 in a flipping manner, and by flipping the sealing plate 53, the sealing plate 53 can cover the avoidance groove 52 or be offset from the avoidance groove 52. Of course, in other embodiments, the sealing plate 53 may be installed on the upper cover 50 in a translational manner, so that the sealing plate 53 can cover the avoidance groove 52 or be offset from the avoidance groove 52.

[0034] A joint 54 is provided on the upper cover 50, the inner end of the joint 54 is connected to the inner cavity of the melting crucible 10, and the outer end is connected to the external protective gas source. The external protective gas (such as carbon dioxide) is transported to the inner cavity of the melting crucible 10 through the joint 54. During the melting process, the melting crucible 10 is filled with protective gas, so that the air inside the melting crucible 10 is discharged to the outside as much as possible to prevent the magnesium alloy from burning during the melting process. A thermocouple 55 is also provided on the upper cover 50, and the thermocouple 55 extends into the inner cavity of the melting crucible 10. The temperature of the magnesium alloy inside the melting crucible 10 is continuously detected by the thermocouple 55. The power of the electric heating induction coil can be adjusted in real time according to the temperature detected by the thermocouple, and the heating temperature of the magnesium alloy by the melting crucible 10 can be accurately controlled.

[0035] The driving unit of the present utility model includes a mounting bracket 60 and a two-axis driving mechanism. The base of the driving motor 33 and the body 41 of the ultrasonic vibration generator 40 are fixedly connected to the mounting bracket 60. The driving ends of the two-axis driving mechanism are connected to the mounting bracket 60. By driving the mounting bracket 60 to move up and down in the height direction and horizontally in the horizontal direction through the two-axis driving mechanism, the purpose of driving the stirring mechanism 30 and the ultrasonic vibration generator 40 to move is achieved. The two-axis driving mechanism can be composed of a lifting cylinder arranged in the height direction and a transverse cylinder arranged in the horizontal direction. The telescopic rod of the transverse cylinder is connected to the mounting bracket 60, and the telescopic rod of the lifting cylinder is connected to the cylinder body of the transverse cylinder. The two-axis driving mechanism can be other structures capable of driving the mounting bracket 60 to move up and down and horizontally.

[0036] It should be noted that the heating unit for heating the melting crucible 10 of the present utility model is not limited to the above-mentioned electrothermal induction coil, and it can also be other heating units, such as an electric heating plate, etc.

[0037] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model by using the content of the specification and drawings of the present utility model, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present utility model.

Claims

1. A magnesium-based composite material smelting device, characterized in that: It includes a melting crucible, a heating unit for heating the melting crucible, a stirring mechanism, an ultrasonic vibration generator, and a driving unit; The top of the smelting crucible is provided with an opening and an upper cover for sealing the opening; The stirring mechanism includes a stirring shaft, a stirring head installed at the lower end of the stirring shaft, and a driving motor, wherein the driving motor is used to drive the stirring shaft to rotate so that the stirring head can stir the molten magnesium alloy inside the melting crucible; The ultrasonic vibration generator includes a body and a vibration head connected to the lower end of the body and extending downward; The driving unit is used to drive the stirring mechanism and the ultrasonic vibration generator to move up and down in the height direction and move horizontally, so that the stirring head and the vibration head can be respectively extended into the melting crucible.

2. The magnesium-based composite material smelting device according to claim 1, characterized in that: The upper cover is provided with a through hole for the stirring shaft and the vibration head to pass through, and an avoidance groove. The through hole is arranged in the middle of the upper cover, and the avoidance groove extends inward from the edge of the upper cover to be connected with the through hole. The upper cover is also provided with a sealing plate, which can be movably connected to the upper cover to move between a first position of the sealing avoidance groove and a second position offset from the avoidance groove.

3. The magnesium-based composite material smelting device according to claim 2, characterized in that: The upper surface edge of the upper cover is provided with an arc-shaped guide groove, the outer side of the sealing plate is slidably embedded in the guide groove, and the sealing cover can be rotatably matched with the upper cover so that the outer side of the sealing plate can slide along the extension direction of the guide groove.

4. The magnesium-based composite material smelting device according to claim 3, characterized in that: The periphery of the through hole is provided with a protrusion extending upward, the outer edge surface of the protrusion is arc-shaped, the inner side edge of the sealing plate forms an arc that matches the shape of the outer edge surface of the protrusion so that the seal abuts against the outer edge surface of the protrusion and can rotate around the protrusion, the edge of the upper cover is provided with a first rib extending upward, the inner side of the first rib is provided with a second rib extending toward the middle of the upper cover, and the guide groove is surrounded by the first rib, the second rib and the upper surface of the upper cover.

5. The magnesium-based composite material smelting device according to claim 1, characterized in that: The upper cover is provided with a joint, the inner end of which is connected to the inner cavity of the melting crucible, and the outer end of which is used to be connected to an external protective gas source to transport protective gas to the inner cavity of the melting crucible.

6. The magnesium-based composite material smelting device according to claim 1, characterized in that: The upper cover is also provided with a thermocouple which extends into the inner cavity of the smelting crucible to detect the temperature inside the smelting crucible.

7. The magnesium-based composite material smelting device according to claim 1, characterized in that: The driving unit comprises a mounting frame and a two-axis driving mechanism. The base of the driving motor and the body of the ultrasonic vibration generator are fixedly connected to the mounting frame, and the driving end of the two-axis driving mechanism is connected to the mounting frame.

8. The magnesium-based composite material smelting device according to claim 1, characterized in that: The heating unit is an electric heating induction coil wound around the outside of the melting crucible.

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