Creep-resistant magnesium alloy and preparation method thereof

Abstract

The invention discloses a creep-resistant magnesium alloy and a preparation method thereof, and belongs to the technical field of magnesium alloy preparation, the creep-resistant magnesium alloy comprises a smelting furnace and a cover plate, the bottom of the smelting furnace is provided with a turnover mechanism, one side of the top of the cover plate is provided with a feeding port, a circular screen plate is horizontally arranged in the smelting furnace, and stirring blades are uniformly fixed to the bottom of the circular screen plate in the circumferential direction; a buffering mechanism connected with the circular screen plate is arranged in the middle of the top of the cover plate, and a rotating mechanism for controlling the circular screen plate to rotate is arranged on one side of the top of the cover plate. According to the smelting furnace, the circular screen plate is horizontally arranged in the smelting furnace, metal ingots can be supported, buffering can be conducted in the feeding process of the metal ingots in cooperation with a buffering mechanism composed of a sleeve, a sliding rod, a transverse rod, a strip-shaped groove, a first spring and a second spring, and therefore damage to a crucible in the smelting furnace is reduced; and the adding speed of the metal ingot is increased, and then the smelting speed is increased.

Description

Technical Field

[0001] The present invention relates to a preparation device, in particular to a method for preparing a creep-resistant magnesium alloy. The present invention also relates to a preparation method, in particular to a method for preparing a creep-resistant magnesium alloy, and belongs to the technical field of magnesium alloy preparation. Background Art

[0002] Creep refers to the slow and continuous plastic deformation of a material under constant stress over time. Creep-resistant magnesium alloys are designed to address the problem that magnesium alloys are prone to obvious creep deformation under some high temperature and high stress conditions. Through composition optimization, special processes and other means, the alloys are made to have better resistance to creep deformation. Some rare earth elements, zirconium, etc. are added to creep-resistant magnesium alloys to improve the strength and creep resistance of the alloy.

[0003] In the prior art, for example, the invention with application number 202010717863.6 discloses an atmosphere-protected high-purity magnesium alloy smelting furnace and its smelting process. In order to solve the problem that the smelting process of magnesium alloy is usually carried out in the air, and at high temperatures, common metals such as magnesium, iron, and aluminum have active chemical properties and are easily oxidized by air. During smelting, in order to prevent the oxidation of metal raw materials, it is usually necessary to add a covering agent to the upper part of the furnace body, but the addition of an oxygen-isolating covering agent will cause secondary pollution to the magnesium alloy in the furnace body, affecting the purity of its finished product. The positional relationship between the roller and the rack seat can ensure that there is an appropriate gap between the gear and the rack, ensure the transmission accuracy, and reduce the wear between the gear and the rack; the pressure roller limits the jumping of the rack from above to avoid tooth jumping; at the same time, it also avoids the outward displacement of the meshing line between the gear and the rack, further ensuring the motion accuracy. The device is applied to the flying saw machine, which has the function and effect of improving the motion accuracy of the flying saw machine.

[0004] Similar to the above application, there are still some shortcomings:

[0005] Since the metal ingot is heavy and has certain edges and corners, it needs to be added slowly to avoid damaging the crucible, which greatly affects the smelting speed of the alloy. During the stirring process, it can only be rotated and stirred at a fixed position, and the stirring effect is poor, affecting the mixing effect and rate of rare earth elements and rare earth elements and zirconium. In addition, the addition of rare earth elements and zirconium during the smelting process is inconvenient and has low functionality.

[0006] Therefore, a creep-resistant magnesium alloy and its preparation method are designed to optimize the above problems. Summary of the invention

[0007] The main purpose of the present invention is to provide a creep-resistant magnesium alloy and a preparation method thereof. A circular mesh plate is horizontally arranged inside a smelting furnace to support the metal ingots. The metal ingots can be supported by the buffer mechanism composed of a sleeve, a slide rod, a cross bar, a strip groove, a first spring and a second spring. The buffer mechanism can be used to reduce the damage to the crucible in the smelting furnace and increase the addition rate of the metal ingots, thereby increasing the smelting rate. A rotating mechanism composed of a rotating motor, a first bevel gear and a second bevel gear is arranged on the outside of the sleeve to change the position of the blanking during the feeding process. In addition, in the process of rotating the circular mesh plate, the spiral blades at the bottom of the cover plate are used in combination. The spiral blades exert a certain thrust on the blanking, and the blanking is evenly distributed on the top of the circular mesh plate in a spiral shape to ensure the melting. The feeding amount during refining is controlled by fixing stirring blades in a circular array evenly at the bottom of the mesh plate, and then cooperating with a reciprocating lifting mechanism composed of a reciprocating screw, a slider, a sliding sleeve, an electric telescopic rod, a strip rod, a rotating rod, a third bevel gear, a rectangular rod, and a rectangular sliding hole. During the process of controlling the rotation of the stirring blades, the stirring blades can be automatically controlled to move up and down inside the smelting furnace to increase the mixing rate of rare earths. A funnel, a rare earth element tank, and a conduit are arranged on the top of the cover plate, and then used in conjunction with a feeding mechanism composed of a turntable, a quantitative groove, a transfer bin, and a blanking port inside the cover plate. The turntable is fixed at the bottom end of the sleeve, so that during the stirring process inside the smelting furnace, the turntable is automatically driven to rotate, and the rare earth inside the quantitative groove is discharged from the blanking port, so that the rare earth raw materials can be evenly sprinkled inside the metal solution, without manual feeding, thereby improving the functionality of the device.

[0008] The purpose of the present invention can be achieved by adopting the following technical solutions:

[0009] A method for preparing a creep-resistant magnesium alloy comprises a smelting furnace and a cover plate, wherein a tipping mechanism is provided at the bottom of the smelting furnace, a feeding port is provided on one side of the top of the cover plate, a circular mesh plate is horizontally arranged inside the smelting furnace, stirring blades are evenly fixed to the bottom of the circular mesh plate along the circumferential direction, a buffer mechanism connected to the circular mesh plate is provided at the middle position of the top of the cover plate, a rotating mechanism for controlling the rotation of the circular mesh plate is provided on one side of the top of the cover plate, a mounting plate is fixed to the side of the top of the cover plate, a reciprocating lifting mechanism for controlling the up and down movement of the stirring blades is vertically provided on the top of the mounting plate, a vacuum pump connected to the inside of the smelting furnace is installed at the bottom of the mounting plate, an inert gas tank connected to the inside of the smelting furnace is provided on one side of the top of the mounting plate, and a feeding mechanism for adding rare earth elements is provided on the other side of the top of the mounting plate.

[0010] Preferably: the tipping mechanism includes a bracket, an axle, a hand-cranked reducer and a hydraulic cylinder, the bracket is located below the smelting furnace, the axle is rotatably installed between the middle position of the side of the smelting furnace and the bracket, one end of the top of the bracket is provided with a hand-cranked reducer, and the driving shaft of the hand-cranked reducer is connected to the end of the axle, a hydraulic cylinder is vertically installed at one end of the top of the bracket away from the hand-cranked reducer, and the output end of the hydraulic cylinder is connected to the side of the cover plate.

[0011] Preferably: the buffer mechanism includes a sleeve, a sliding rod, a cross bar, a strip groove, a first spring and a second spring. The sleeve is vertically rotatably installed at the middle position of the top of the cover plate. A sliding rod is vertically slidably installed inside the sleeve. The sliding rod extends to the interior of the smelting furnace and is fixedly connected to the center of the circular mesh plate. A cross bar is vertically fixed to the top of the sliding rod. Strip grooves matching the cross bar are symmetrically opened on both sides of the sleeve. Both ends of the cross bar pass through the inside of the strip groove. A first spring is provided between the top of the cross bar and the top of the sleeve, and a second spring is installed between the bottom of the cross bar and the bottom end of the sleeve, and the sliding rod passes through the inside of the second spring.

[0012] Preferably: the rotating mechanism includes a rotating motor, a first bevel gear and a second bevel gear, the rotating motor is installed on the top of the cover plate, the first bevel gear is installed on the output end of the rotating motor, the second bevel gear is horizontally fixed to the bottom end of the sleeve, and the top of the second bevel gear is meshed with the first bevel gear.

[0013] Preferably: a spiral plate is fixed to the bottom end of the cover plate, and the gap between the spiral plates is greater than the length of the metal ingot.

[0014] Preferably: the reciprocating lifting mechanism includes a reciprocating screw, a slider, a sleeve and a driving assembly. The reciprocating screw is rotatably mounted on the top of the mounting plate. A slider is provided on the reciprocating screw. A sleeve is provided on the sleeve. The sleeve is located above the cross bar, and the inner diameter of the sleeve is smaller than the length between the ends of the two sets of cross bars. The sleeve is fixed on the outside of the slider, and a driving assembly is provided at the bottom end of the reciprocating screw.

[0015] Preferably: the driving assembly includes an electric telescopic rod, a strip rod, a rotating rod, a third bevel gear, a rectangular rod and a rectangular sliding hole, the electric telescopic rod is vertically installed on the mounting plate, the output end of the mounting plate is installed with a strip rod, the strip rod is parallel to the bottom of the mounting plate, the end of the strip rod is rotatably installed with a rotating rod, the bottom end of the rotating rod is installed with a third bevel gear meshing with the first bevel gear, a rectangular rod is vertically fixed to the top of the rotating rod, and a rectangular sliding hole matching the rectangular rod is opened at the bottom end of the reciprocating screw.

[0016] Preferably: the feeding mechanism includes a funnel, a rare earth element tank, a conduit and a dispersion component, the funnel is fixed on the top of the mounting plate, the rare earth element tanks are evenly arranged on the top of the funnel, the bottom of the funnel is provided with a conduit connected to the inside of the smelting furnace, and the inside of the cover plate and at the bottom end of the conduit is provided with a dispersion component for moving and feeding the rare earth elements.

[0017] Preferably: the dispersion component includes a turntable, a dosing groove, a transfer bin and a blanking port, the turntable is fixed at the bottom end of the outer side of the sleeve, the dosing groove is opened on the turntable, the inside of the cover plate is provided with a transfer bin cooperating with the turntable, the bottom of the transfer bin is evenly provided with blanking ports connected to the inside of the smelting furnace along the circumferential direction, and the top of the blanking port is connected to the dosing groove.

[0018] The present invention also provides a method for preparing a creep-resistant magnesium alloy, comprising the following steps:

[0019] Step 1: Open the sealing cover at the top of the feed port, and put the metal ingot into the inside of the smelting furnace from the feed port. The metal ingot falls directly onto the top of the circular mesh plate. Due to the presence of the first spring and the second spring, the metal ingot has a certain buffering effect during the falling process. At the same time, when the metal ingot is put in, start the rotating motor to cooperate with the first bevel gear and the second bevel gear to drive the sleeve and the circular mesh plate to rotate. In the process of the circular mesh plate driving the metal ingot to rotate, since the metal ingot is located inside the spiral plate, a certain thrust will be applied to the metal ingot to ensure that the put-in metal ingot is evenly distributed on the top of the circular mesh plate. As the metal ingot increases, the first spring will be stretched, and the second spring will be compressed, and the circular mesh plate will automatically move down. Repeat the above operation to put the metal ingot in completely.

[0020] Step 2: Start the vacuum pump to evacuate the interior of the melting furnace, then open the valve at the bottom of the inert gas tank and inject the inert gas into the melting furnace to prevent the metal from undergoing oxidation reaction;

[0021] Step 3: Power on the resistance wire inside the smelting furnace to heat the metal ingot. After the metal ingot melts into liquid, the first spring and the second spring will automatically reset, and the circular mesh plate will rise to the initial position. At this time, the stirring blade is located inside the molten metal.

[0022] Step 4: Start the rotating motor again to drive the stirring blades at the bottom of the circular screen to stir the molten metal, and during the stirring process, start the electric telescopic rod to drive the third bevel gear to move vertically to mesh the third bevel gear with the first bevel gear. At this time, the rotation of the first bevel gear will control the rotation of the reciprocating screw, driving the sleeve to move vertically back and forth along the height direction of the sleeve. The downward movement of the sleeve will press down the cross bar, thereby controlling the stirring blades to move downward during the rotation process. When the sleeve is reset, the first spring and the second spring control the stirring blades to automatically reset during the rotation process. The stirring blades continue to move up and down during the rotation process, thereby increasing the stirring rate.

[0023] Step 5: After the metal is completely melted, open the switch valve at the bottom of the rare earth element tank and inject the rare earth elements to be added into the funnel. The rare earth elements are automatically added to the quantitative tank through the catheter, and the turntable rotates with the sleeve at the same time. During the rotation, the turntable drops the rare earth elements in the quantitative tank from different drop ports into the molten metal. The molten metal is always stirred, so the rare earth elements can be quickly mixed;

[0024] Step 6: After the molten metal is evenly mixed, move the circular screen to the top to filter the impurities in the molten metal. Then turn off the power of the rotating motor, start the hydraulic cylinder to open the cover, scrape off the impurities on the top of the circular screen, and finally use the hand-cranked reducer to pour the molten metal inside the smelting furnace for casting and molding.

[0025] The beneficial effects of the present invention are:

[0026] The present invention provides a creep-resistant magnesium alloy and a preparation method thereof. A circular mesh plate is horizontally arranged inside a smelting furnace to support a metal ingot. The metal ingot is then used in conjunction with a buffer mechanism composed of a sleeve, a slide rod, a cross bar, a strip groove, a first spring, and a second spring. The metal ingot can be buffered during the feeding process to reduce damage to the crucible in the smelting furnace, increase the addition rate of the metal ingot, and thus increase the smelting rate.

[0027] By arranging a rotating mechanism consisting of a rotating motor, a first bevel gear and a second bevel gear on the outside of the sleeve, the position of the blanking material can be changed during the feeding process. In addition, in the process of rotating the circular screen plate, the spiral blades at the bottom of the cover plate are used together. The spiral blades exert a certain thrust on the blanking material, and the blanking material is evenly distributed on the top of the circular screen plate in a spiral shape to ensure the feeding amount during smelting.

[0028] By evenly fixing stirring blades in a circular array at the bottom of the screen plate, and coordinating and lifting mechanisms composed of a reciprocating screw rod, a slider, a sliding sleeve, an electric telescopic rod, a strip rod, a rotating rod, a third bevel gear, a rectangular rod, and a rectangular sliding hole, the stirring blades can be automatically controlled to move up and down inside the smelting furnace during the process of controlling the rotation of the stirring blades, thereby increasing the mixing rate of the rare earths;

[0029] A funnel, a rare earth element tank and a conduit are arranged on the top of the cover plate, and a feeding mechanism composed of a turntable, a quantitative groove, a transfer bin and a drop port is used in conjunction with the cover plate. The turntable is fixed at the bottom end of the sleeve, so that during the stirring process inside the smelting furnace, the turntable is automatically driven to rotate, and the rare earth in the quantitative groove is discharged from the drop port. The rare earth raw materials can be evenly sprinkled inside the metal solution without manual feeding, thereby improving the functionality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a front cross-sectional view of a preferred embodiment of a creep-resistant magnesium alloy and a preparation method thereof of the present invention;

[0031] Figure 2 It is a front view of a preferred embodiment of a creep-resistant magnesium alloy and a preparation method thereof of the present invention;

[0032] Figure 3 A structural diagram of the bottom of a cover plate of a preferred embodiment of a creep-resistant magnesium alloy and a preparation method thereof according to the present invention;

[0033] Figure 4 This is a structural diagram of the top of a circular mesh plate of a preferred embodiment of a creep-resistant magnesium alloy and a preparation method thereof of the present invention;

[0034] Figure 5 A diagram of a reciprocating lifting mechanism of a preferred embodiment of a creep-resistant magnesium alloy and a preparation method thereof according to the present invention;

[0035] Figure 6 A creep-resistant magnesium alloy and a method for preparing the same in accordance with a preferred embodiment of the present invention Figure 1 Enlarged view of point A in the middle;

[0036] Figure 7 A feeding mechanism diagram of a preferred embodiment of a creep-resistant magnesium alloy and a preparation method thereof according to the present invention;

[0037] Figure 8 It is a cross-sectional view of a cover plate of a preferred embodiment of a creep-resistant magnesium alloy and a preparation method thereof according to the present invention.

[0038] In the figure: 1, melting furnace; 2, bracket; 3, shaft; 4, hand-cranked reducer; 5, cover plate; 6, hydraulic cylinder; 7, feed port; 8, round mesh plate; 9, stirring blade; 10, buffer mechanism; 11, rotating mechanism; 12, reciprocating lifting mechanism; 13, vacuum pump; 14, mounting plate; 15, feeding mechanism; 16, inert gas tank; 17, spiral plate; 18, sleeve; 19, slide rod; 20, cross bar; 21, strip groove; 22, the first A spring; 23. A second spring; 24. A rotating motor; 25. A first bevel gear; 26. A second bevel gear; 27. A reciprocating screw; 28. A slider; 29. ​​A sleeve; 30. An electric telescopic rod; 31. A strip rod; 32. A rotating rod; 33. A third bevel gear; 34. A rectangular rod; 35. A rectangular sliding hole; 36. A funnel; 37. A rare earth element tank; 38. A conduit; 39. A turntable; 40. A quantitative trough; 41. A transfer bin; 42. A drop port. DETAILED DESCRIPTION

[0039] In order to make the technical solution of the present invention more clear and specific to those skilled in the art, the present invention is further described in detail below in conjunction with embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0040] like Figure 1-Figure 8 As shown, this embodiment provides a method for preparing a creep-resistant magnesium alloy, comprising a smelting furnace 1 and a cover plate 5, wherein a tipping mechanism is provided at the bottom of the smelting furnace 1, a feeding port 7 is provided on one side of the top of the cover plate 5, a circular mesh plate 8 is horizontally arranged inside the smelting furnace 1, a stirring blade 9 is evenly fixed to the bottom of the circular mesh plate 8 along the circumferential direction, a buffer mechanism 10 connected to the circular mesh plate 8 is provided at the middle position of the top of the cover plate 5, a rotating mechanism 11 for controlling the rotation of the circular mesh plate 8 is provided on one side of the top of the cover plate 5, a mounting plate 14 is fixed to the side of the top of the cover plate 5, a reciprocating lifting mechanism 12 for controlling the up and down movement of the stirring blade 9 is vertically provided on the top of the mounting plate 14, a vacuum pump 13 connected to the inside of the smelting furnace 1 is installed at the bottom of the mounting plate 14, an inert gas tank 16 connected to the inside of the smelting furnace 1 is provided on one side of the top of the mounting plate 14, and a feeding mechanism 15 for adding rare earth elements is provided on the other side of the top of the mounting plate 14.

[0041] The general working principle is as follows: during the smelting process of the raw materials, the metal ingots are put in from the feed port 7. The metal ingots will not fall directly into the bottom of the smelting furnace 1. The metal ingots will be intercepted by the circular mesh plate 8. In addition, during the feeding process of the metal ingots, the buffer mechanism 10 can be used to reduce the impact force during the feeding process. During the feeding process, the rotation of the circular mesh plate 8 is controlled by the rotating mechanism 11 to evenly lay the metal ingots on the top of the circular mesh plate 8. As the weight of the top of the circular mesh plate 8 increases, the circular mesh plate 8 continues to move downward. When the bottom of the stirring blade 9 contacts the bottom of the smelting furnace 1, the feeding is stopped, and then the sealing cover at the feed port 7 is covered, and the vacuum pump 13 is started to smelt. The interior of the furnace 1 is evacuated, and an inert gas is injected to prevent metal oxidation during the smelting process. Then, the internal power of the smelting furnace 1 is turned on to heat and melt the metal. During the melting process, the area in contact with the inner surface of the smelting furnace 1 is melted first, and the rotating mechanism 11 is started to drive the circular screen plate 8 and the stirring blade 9 to rotate, accelerating the stirring to increase the smelting rate. As the smelting continues, the buffer mechanism 10 controls the circular screen plate 8 to rise and reset. At this time, the reciprocating lifting mechanism 12 can be used to control the circular screen plate 8 and the stirring blade 9 to move up and down while rotating, thereby increasing the flow of the molten metal. Then, the feeding mechanism 15 is used to add rare earth elements and mix them evenly with the molten metal.

[0042] In this embodiment, the tipping mechanism includes a bracket 2, an axle 3, a hand-cranked reducer 4 and a hydraulic cylinder 6. The bracket 2 is located below the smelting furnace 1. The axle 3 is rotatably installed between the middle position of the side of the smelting furnace 1 and the bracket 2. A hand-cranked reducer 4 is provided at one end of the top of the bracket 2, and the driving shaft of the hand-cranked reducer 4 is connected to the end of the axle 3. A hydraulic cylinder 6 is vertically installed at one end of the top of the bracket 2 away from the hand-cranked reducer 4, and the output end of the hydraulic cylinder 6 is connected to the side of the cover plate 5.

[0043] Partial working principle: After the molten metal is evenly mixed, the hydraulic cylinder 6 is started to lift the cover plate 5 upward, and then the hand-cranked reducer 4 is used to control the rotation of the smelting furnace 1 to pour out the molten metal for the next process.

[0044] In this embodiment, the buffer mechanism 10 includes a sleeve 18, a slide rod 19, a cross bar 20, a strip groove 21, a first spring 22 and a second spring 23. The sleeve 18 is vertically rotatably installed at the middle position of the top of the cover plate 5. The slide rod 19 is vertically slidably installed inside the sleeve 18. The slide rod 19 extends to the interior of the smelting furnace 1 and is fixedly connected to the center of the circular mesh plate 8. The cross bar 20 is vertically fixed to the top of the slide rod 19. Strip grooves 21 cooperating with the cross bar 20 are symmetrically opened on both sides of the sleeve 18. Both ends of the cross bar 20 pass through the inside of the strip groove 21. A first spring 22 is provided between the top of the cross bar 20 and the top of the sleeve 18. A second spring 23 is installed between the bottom of the cross bar 20 and the bottom end of the sleeve 18, and the slide rod 19 passes through the inside of the second spring 23.

[0045] Local working principle: After the metal ingot falls onto the top of the circular mesh plate 8, as the weight of the top of the circular mesh plate 8 increases, the slide rod 19 will move downward, the first spring 22 will be stretched, and the second spring 23 will be compressed, and the circular mesh plate 8 will automatically move downward to ensure that the input metal ingot will not have a large impact force, thereby protecting the smelting furnace 1.

[0046] In this embodiment, the rotating mechanism 11 includes a rotating motor 24, a first bevel gear 25 and a second bevel gear 26. The rotating motor 24 is installed on the top of the cover plate 5. The first bevel gear 25 is installed on the output end of the rotating motor 24. The second bevel gear 26 is horizontally fixed at the bottom end of the sleeve 18, and the top of the second bevel gear 26 is meshed with the first bevel gear 25.

[0047] Partial working principle: During the stirring process, the rotating motor 24 is started to drive the first bevel gear 25 to rotate, and the first bevel gear 25 drives the second bevel gear 26 to rotate, thereby controlling the sleeve 18, the sliding rod 19, the circular mesh plate 8 and the stirring blade 9 to rotate to stir the molten metal.

[0048] In this embodiment, a spiral plate 17 is fixed to the bottom end of the cover plate 5, and the gap between the spiral plates 17 is greater than the length of the metal ingot.

[0049] Local working principle: When the metal ingot falls into the interior of the smelting furnace 1, it will continue to move downward as the weight of the top of the circular mesh plate 8 increases. The distance between the metal ingot at the top of the circular mesh plate 8 and the spiral plate 17 is always smaller than the height of the spiral plate 17. Therefore, the metal ingot just put in will always be located inside the spiral plate 17. During the feeding process, as the rotating motor 24 drives the circular mesh plate 8 to rotate, the spiral plate 17 will exert a moving thrust on the metal ingot to ensure that the flat metal ingots on the top of the circular mesh plate 8 are also placed in a spiral shape and are evenly distributed on the top of the circular mesh plate 8, to ensure that the internal space of the smelting furnace 1 is fully utilized and the input amount is guaranteed.

[0050] In this embodiment, the reciprocating lifting mechanism 12 includes a reciprocating screw 27, a slider 28, a sleeve 29 and a drive assembly. The reciprocating screw 27 is rotatably mounted on the top of the mounting plate 14. A slider 28 is provided on the reciprocating screw 27. A sleeve 29 is provided on the sleeve 18. The sleeve 29 is located above the cross bar 20, and the inner diameter of the sleeve 29 is smaller than the length between the ends of the two sets of cross bars 20. The sleeve 29 is fixed to the outside of the slider 28, and a drive assembly is provided at the bottom end of the reciprocating screw 27.

[0051] Local working principle: Before the metal ingot inside the smelting furnace 1 is completely melted, the driving assembly does not drive the reciprocating screw 27 to rotate. When the metal ingot is completely melted, during the rotation of the stirring blade 9, the reciprocating lifting mechanism 12 simultaneously drives the stirring blade 9 to move up and down on different vertical planes to quickly fuse the rare earth elements.

[0052] In this embodiment, the driving assembly includes an electric telescopic rod 30, a strip rod 31, a rotating rod 32, a third bevel gear 33, a rectangular rod 34 and a rectangular sliding hole 35. The electric telescopic rod 30 is vertically mounted on the mounting plate 14. The output end of the mounting plate 14 is mounted with a strip rod 31. The strip rod 31 is parallel to the bottom of the mounting plate 14. The end of the strip rod 31 is rotatably mounted with a rotating rod 32. The bottom end of the rotating rod 32 is mounted with a third bevel gear 33 meshing with the first bevel gear 25. A rectangular rod 34 is vertically fixed to the top of the rotating rod 32. A rectangular sliding hole 35 cooperating with the rectangular rod 34 is provided at the bottom end of the reciprocating screw rod 27.

[0053] Local working principle: before the metal ingot is completely melted, the third bevel gear 33 is not engaged with the first bevel gear 25. When the metal ingot is completely melted, the electric telescopic rod 30 is started to control the strip rod 31 to move downward, so that the third bevel gear 33 is engaged with the first bevel gear 25, and the rectangular rod 34 slides inside the rectangular sliding hole 35. The rotation of the third bevel gear 33 will drive the rotation of the reciprocating screw 27.

[0054] In this embodiment, the feeding mechanism 15 includes a funnel 36, a rare earth element tank 37, a conduit 38 and a dispersion component. The funnel 36 is fixed on the top of the mounting plate 14. The rare earth element tanks 37 are evenly arranged on the top of the funnel 36. The bottom of the funnel 36 is provided with a conduit 38 that is connected to the inside of the smelting furnace 1. A dispersion component for moving and feeding the rare earth elements is provided inside the cover plate 5 and at the bottom end of the conduit 38.

[0055] Partial working principle: After the metal is completely melted, at this time, open the switch valve at the bottom of the rare earth element tank 37, inject the rare earth elements required to be added into the interior of the funnel 36, and the rare earth elements are automatically added to the interior of the smelting furnace 1 through the conduit 38, and are quickly mixed with the stirring of the molten metal.

[0056] In this embodiment, the dispersion component includes a turntable 39, a dosing groove 40, a transfer bin 41 and a drop port 42. The turntable 39 is fixed to the bottom end of the outer side of the sleeve 18. The dosing groove 40 is provided on the turntable 39. The interior of the cover plate 5 is provided with a transfer bin 41 that cooperates with the turntable 39. The bottom of the transfer bin 41 is evenly provided with drop ports 42 that are connected to the inside of the smelting furnace 1 along the circumferential direction, and the top of the drop port 42 is connected to the dosing groove 40.

[0057] Local working principle: rare earth elements are automatically added to the interior of the quantitative tank 40 through the conduit 38, and the turntable 39 rotates simultaneously with the sleeve 18, and during the rotation process, the turntable 39 drops the rare earth elements in the quantitative tank 40 into the interior of the molten metal from different drop ports 42, and releases the rare earth elements in multiple directions to increase the mixing rate.

[0058] like Figure 1-Figure 8 As shown, this embodiment provides a method for preparing a creep-resistant magnesium alloy as follows:

[0059] Step 1: Open the sealing cover at the top of the feed port 7, and put the metal ingot into the inside of the smelting furnace 1 from the feed port 7. The metal ingot falls directly onto the top of the circular mesh plate 8. Due to the presence of the first spring 22 and the second spring 23, the metal ingot has a certain buffering effect during the falling process. At the same time, when the metal ingot is put in, start the rotating motor 24 to cooperate with the first bevel gear 25 and the second bevel gear 26 to drive the sleeve 18 and the circular mesh plate 8 to rotate. In the process of the circular mesh plate 8 driving the metal ingot to rotate, since the metal ingot is located inside the spiral plate 17, a certain thrust will be applied to the metal ingot to ensure that the put-in metal ingot is evenly distributed on the top of the circular mesh plate 8. As the metal ingot increases, the first spring 22 will be stretched, and the second spring 23 will be compressed, and the circular mesh plate 8 will automatically move down. Repeat the above operation to put the metal ingot in completely.

[0060] Step 2: Start the vacuum pump 13 to evacuate the interior of the smelting furnace 1, then open the valve at the bottom of the inert gas tank 16 to inject inert gas into the interior of the smelting furnace 1 to prevent oxidation reaction of the metal;

[0061] Step 3: The resistance wire inside the smelting furnace 1 is energized to heat the metal ingot. After the metal ingot is melted into liquid, the first spring 22 and the second spring 23 will automatically reset, and the circular mesh plate 8 rises to the initial position. At this time, the stirring blade 9 is located inside the molten metal;

[0062] Step 4: Start the rotating motor 24 again to drive the stirring blade 9 at the bottom of the circular screen plate 8 to stir the molten metal, and during the stirring process, start the electric telescopic rod 30 to drive the third bevel gear 33 to move vertically, and mesh the third bevel gear 33 with the first bevel gear 25. At this time, the rotation of the first bevel gear 25 will control the rotation of the reciprocating screw rod 27, driving the sliding sleeve 29 to move vertically back and forth along the height direction of the sleeve 18. The downward movement of the sliding sleeve 29 will press down the cross bar 20, thereby controlling the stirring blade 9 to move downward during the rotation process. When the sliding sleeve 29 is reset, the first spring 22 and the second spring 23 control the stirring blade 9 to automatically reset during the rotation process. The stirring blade 9 continues to move up and down during the rotation process, thereby increasing the stirring rate;

[0063] Step 5: After the metal is completely melted, the switch valve at the bottom of the rare earth element tank 37 is opened, and the rare earth elements to be added are injected into the funnel 36. The rare earth elements are automatically added to the quantitative tank 40 through the conduit 38, and the turntable 39 rotates simultaneously with the sleeve 18. During the rotation, the turntable 39 drops the rare earth elements in the quantitative tank 40 into the metal liquid from different drop ports 42. The metal liquid is always stirred, so the rare earth elements can be quickly mixed;

[0064] Step 6: After the molten metal is evenly mixed, the circular mesh plate 8 is moved to the top to filter the impurities in the molten metal. Then the power of the rotating motor 24 is turned off, and the hydraulic cylinder 6 is started to open the cover plate 5 to scrape off the impurities on the top of the circular mesh plate 8. Finally, the hand-cranked reducer 4 is used to pour the molten metal inside the smelting furnace 1 for casting and molding.

[0065] The above description is only a further embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and concepts of the present invention within the scope disclosed by the present invention, which belong to the protection scope of the present invention.

Claims

1. A method for preparing a creep-resistant magnesium alloy, comprising a preparation device for the method, the preparation device comprising a melting furnace (1) and a cover plate (5), characterized in that: A tipping mechanism is provided at the bottom of the smelting furnace (1), a feeding port (7) is provided at one side of the top of the cover plate (5), a circular mesh plate (8) is horizontally arranged inside the smelting furnace (1), stirring blades (9) are evenly fixed to the bottom of the circular mesh plate (8) along the circumferential direction, a buffer mechanism (10) connected to the circular mesh plate (8) is provided at the middle position of the top of the cover plate (5), a rotating mechanism (11) for controlling the rotation of the circular mesh plate (8) is provided at one side of the top of the cover plate (5), a mounting plate (14) is fixed to the side of the top of the cover plate (5), a reciprocating lifting mechanism (12) for controlling the up and down movement of the stirring blades (9) is vertically provided at the top of the mounting plate (14), a vacuum pump (13) connected to the inside of the smelting furnace (1) is installed at the bottom of the mounting plate (14), an inert gas tank (16) connected to the inside of the smelting furnace (1) is provided at one side of the top of the mounting plate (14), and a feeding mechanism (15) for adding rare earth elements is provided at the other side of the top of the mounting plate (14).

2. The method for preparing a creep-resistant magnesium alloy according to claim 1, characterized in that: The tipping mechanism comprises a bracket (2), a shaft (3), a hand-cranked reducer (4) and a hydraulic cylinder (6); the bracket (2) is located below the smelting furnace (1); a shaft (3) is rotatably mounted between the bracket (2) and the middle position of the side of the smelting furnace (1); a hand-cranked reducer (4) is arranged at one end of the top of the bracket (2); a driving shaft of the hand-cranked reducer (4) is connected to the end of the shaft (3); a hydraulic cylinder (6) is vertically mounted at one end of the top of the bracket (2) away from the hand-cranked reducer (4); and an output end of the hydraulic cylinder (6) is connected to the side of the cover plate (5).

3. The method for preparing a creep-resistant magnesium alloy according to claim 2, characterized in that: The buffer mechanism (10) comprises a sleeve (18), a slide rod (19), a cross bar (20), a strip groove (21), a first spring (22) and a second spring (23). The sleeve (18) is vertically rotatably mounted at the middle position of the top of the cover plate (5). The slide rod (19) is vertically slidably mounted inside the sleeve (18). The slide rod (19) extends into the interior of the smelting furnace (1) and is fixedly connected to the center of the circular mesh plate (8). The top of the slide rod (19) is vertically fixed with a cross bar (20). The sleeve (18) has strip grooves (21) symmetrically formed on both sides thereof to match the cross bar (20). Both ends of the cross bar (20) pass through the inside of the strip groove (21). A first spring (22) is arranged between the top of the cross bar (20) and the top of the sleeve (18). A second spring (23) is arranged between the bottom of the cross bar (20) and the bottom end of the sleeve (18). The slide rod (19) passes through the inside of the second spring (23).

4. The method for preparing a creep-resistant magnesium alloy according to claim 3, characterized in that: The rotating mechanism (11) comprises a rotating motor (24), a first bevel gear (25) and a second bevel gear (26); the rotating motor (24) is mounted on the top of the cover plate (5); the first bevel gear (25) is mounted on the output end of the rotating motor (24); the second bevel gear (26) is horizontally fixed to the bottom end of the sleeve (18); the top of the second bevel gear (26) is meshed with the first bevel gear (25).

5. The method for preparing a creep-resistant magnesium alloy according to claim 4, characterized in that: A spiral plate (17) is fixed to the bottom end of the cover plate (5), and the gap between the spiral plates (17) is greater than the length of the metal ingot.

6. The method for preparing a creep-resistant magnesium alloy according to claim 5, characterized in that: The reciprocating lifting mechanism (12) comprises a reciprocating screw rod (27), a slider (28), a sliding sleeve (29) and a driving assembly. The reciprocating screw rod (27) is rotatably mounted on the top of the mounting plate (14). The sliding sleeve (29) is sleeved on the sleeve (18). The sliding sleeve (29) is located above the cross bar (20). The inner diameter of the sliding sleeve (29) is smaller than the length between the ends of the two sets of cross bars (20). The sliding sleeve (29) is fixed on the outer side of the slider (28). The driving assembly is provided at the bottom end of the reciprocating screw rod (27).

7. The method for preparing a creep-resistant magnesium alloy according to claim 6, characterized in that: The driving assembly comprises an electric telescopic rod (30), a strip rod (31), a rotating rod (32), a third bevel gear (33), a rectangular rod (34) and a rectangular sliding hole (35). The electric telescopic rod (30) is vertically mounted on a mounting plate (14). The output end of the mounting plate (14) is mounted with a strip rod (31). The strip rod (31) is parallel to the bottom of the mounting plate (14). The end of the strip rod (31) is rotatably mounted with a rotating rod (32). The bottom end of the rotating rod (32) is mounted with a third bevel gear (33) meshing with the first bevel gear (25). The top of the rotating rod (32) is vertically fixed with a rectangular rod (34). The bottom end of the reciprocating screw rod (27) is provided with a rectangular sliding hole (35) matching with the rectangular rod (34).

8. A method for preparing a creep-resistant magnesium alloy according to any one of claims 4 to 7, characterized in that: The feeding mechanism (15) comprises a funnel (36), a rare earth element tank (37), a conduit (38) and a dispersion component. The funnel (36) is fixed on the top of the mounting plate (14). The rare earth element tank (37) is evenly arranged on the top of the funnel (36). The bottom of the funnel (36) is provided with a conduit (38) which is connected to the inside of the smelting furnace (1). A dispersion component for moving and feeding the rare earth elements is provided inside the cover plate (5) and at the bottom end of the conduit (38).

9. The method for preparing a creep-resistant magnesium alloy according to claim 8, characterized in that: The dispersion component comprises a rotating disk (39), a quantitative groove (40), a transfer bin (41) and a blanking port (42). The rotating disk (39) is fixed to the bottom end of the outer side of the sleeve (18). The rotating disk (39) is provided with a quantitative groove (40). The cover plate (5) is provided with a transfer bin (41) matched with the rotating disk (39). The bottom of the transfer bin (41) is provided with blanking ports (42) uniformly arranged along the circumferential direction and connected to the inside of the smelting furnace (1). The top end of the blanking port (42) is connected to the quantitative groove (40).

10. The method for preparing a creep-resistant magnesium alloy according to claim 9, characterized in that: The steps include: Step 1: Open the sealing cover at the top of the feed port (7), and put the metal ingot into the inside of the smelting furnace (1) from the feed port (7). The metal ingot directly falls onto the top of the circular mesh plate (8). Due to the presence of the first spring (22) and the second spring (23), the metal ingot has a certain buffering effect during the falling process. At the same time, when the metal ingot is put in, the rotating motor (24) is started to cooperate with the first bevel gear (25) and the second bevel gear (26) to drive the sleeve (18) and the circular mesh plate (8) to rotate. In the process of the circular mesh plate (8) driving the metal ingot to rotate, since the metal ingot is located inside the spiral plate (17), a certain thrust is applied to the metal ingot to ensure that the put-in metal ingot is evenly distributed on the top of the circular mesh plate (8). As the number of metal ingots increases, the first spring (22) will be stretched, and the second spring (23) will be compressed, and the circular mesh plate (8) will automatically move down. Repeat the above operation to completely put the metal ingot in. Step 2: Start the vacuum pump (13) to evacuate the interior of the smelting furnace (1), then open the valve at the bottom of the inert gas tank (16) to inject inert gas into the interior of the smelting furnace (1) to prevent the metal from undergoing oxidation reaction; Step 3: The resistance wire inside the smelting furnace (1) is energized to heat the metal ingot. After the metal ingot is melted into liquid, the first spring (22) and the second spring (23) are automatically reset, and the circular mesh plate (8) rises to the initial position. At this time, the stirring blade (9) is located inside the metal liquid; Step 4: Start the rotating motor (24) again to drive the stirring blade (9) at the bottom of the circular screen plate (8) to stir the molten metal. During the stirring process, start the electric telescopic rod (30) to drive the third bevel gear (33) to move vertically so that the third bevel gear (33) and the first bevel gear (25) are meshed. At this time, the rotation of the first bevel gear (25) controls the rotation of the reciprocating screw (27), driving the sliding sleeve (29) to move vertically back and forth along the height direction of the sleeve (18). The downward movement of the sliding sleeve (29) presses down the cross bar (20), thereby controlling the stirring blade (9) to move downward during the rotation process. When the sliding sleeve (29) is reset, the first spring (22) and the second spring (23) control the stirring blade (9) to automatically reset during the rotation process. The stirring blade (9) continues to move up and down during the rotation process, thereby increasing the stirring rate. Step 5: After the metal is completely melted, the switch valve at the bottom of the rare earth element tank (37) is opened, and the rare earth elements to be added are injected into the interior of the funnel (36). The rare earth elements are automatically added to the interior of the quantitative tank (40) through the conduit (38), and the turntable (39) rotates simultaneously with the sleeve (18). During the rotation process, the turntable (39) drops the rare earth elements in the quantitative tank (40) into the interior of the molten metal from different drop ports (42). The molten metal is always stirred, so the rare earth elements can be quickly mixed; Step 6: After the molten metal is evenly mixed, the circular screen plate (8) is moved to the top to filter the impurities in the molten metal. Then, the power supply of the rotating motor (24) is turned off, and the hydraulic cylinder (6) is started to open the cover plate (5) to scrape off the impurities on the top of the circular screen plate (8). Finally, the hand-cranked reducer (4) is used to pour the molten metal inside the smelting furnace (1) for casting and molding.

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