Grinding equipment for magnesium metal powder and using method of grinding equipment

Abstract

The invention provides grinding equipment for magnesium metal powder. The grinding equipment comprises a box body, a vacuum assembly, a clamping assembly, a grinding assembly and a collecting assembly. The vacuum assembly is used for maintaining a vacuum environment in the box body; the clamping assembly is used for fixedly clamping a magnesium metal workpiece on the workbench; the grinding assembly comprises a first adjusting mechanism, a second adjusting mechanism and a grinding wheel, the first adjusting mechanism is used for controlling the moving direction and speed of the grinding wheel, and the second adjusting mechanism is used for controlling the magnitude of pressure applied by the grinding wheel to the magnesium metal workpiece; the grinding wheel rotates to grind the magnesium metal workpiece; the collecting assembly is used for collecting magnesium metal powder obtained by the grinding assembly. The invention further provides a using method of the grinding equipment. The method has the advantages in two aspects: on one hand, the possibility of oxidation and explosion in magnesium metal powder processing is avoided; and on the other hand, by controlling the grinding pressure and speed, the quality and the use performance of the magnesium powder are guaranteed, meanwhile, manual grinding is replaced, and the grinding machining efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of metal processing, and in particular relates to a grinding device for magnesium metal powder, and also relates to a method for using the grinding device. Background Art

[0002] Magnesium powder is commonly used in aviation, aerospace, metallurgy, chemical industry, electronics and other industries. Magnesium metal powder is a silvery white powder with a metallic luster. It has active chemical properties at room temperature. When it comes into contact with water or moisture, it will react violently to release hydrogen and release a large amount of heat, which may cause combustion or explosion. It will react violently with chlorine, bromine, iodine, sulfur, phosphorus, arsenic and oxidants, and there is a risk of combustion and explosion.

[0003] The common preparation process of magnesium powder is to grind the magnesium metal workpiece into magnesium metal powder. Currently, manual grinding in the air is usually adopted. The magnesium metal powder prepared in this way is easily oxidized by oxygen in the air during the grinding process. Since magnesium metal powder is flammable, there is a risk of dust explosion during the grinding process. In addition, the speed and pressure of manual grinding cannot be accurately controlled, resulting in fluctuations in the quality of the magnesium metal powder, which cannot meet the requirements of subsequent performance.

[0004] Based on this, providing a magnesium metal powder grinding equipment that can effectively prevent magnesium metal powder from oxidation and explosion during the grinding process and has controllable grinding pressure and speed is of great significance for improving the quality of magnesium metal powder and ensuring its performance, and is also a technical problem that needs to be solved urgently. Summary of the invention

[0005] One of the purposes of the present invention is to provide a magnesium metal powder grinding device which avoids the possibility of oxidation and explosion of magnesium metal powder during grinding, and at the same time ensures the quality and performance requirements of magnesium metal powder by controlling grinding pressure and grinding speed.

[0006] A second object of the present invention is to provide a method for using a magnesium metal powder grinding device that avoids the possibility of oxidation and explosion of magnesium metal powder during grinding, while ensuring the quality and performance requirements of the magnesium metal powder by controlling the grinding pressure and grinding speed.

[0007] The technical solution adopted by the present invention to achieve one of the purposes is: to provide a magnesium metal powder grinding device, including: a box body, a vacuum component, a clamping component, a grinding component and a collecting component; The side wall of the box is provided with a feed port, and a workbench is provided inside the box; the vacuum component is used to maintain a vacuum environment inside the box; The clamping assembly is used to fix the magnesium metal workpiece on the workbench; a grinding assembly is provided above the workbench; the grinding assembly includes a first adjustment mechanism, a second adjustment mechanism and a grinding wheel, the first adjustment mechanism is used to control the moving direction and speed of the grinding wheel, and the second adjustment mechanism is used to control the pressure applied by the grinding wheel to the magnesium metal workpiece; the grinding wheel grinds the magnesium metal workpiece by rotating; The collecting assembly is arranged at the end of the workbench and is used for collecting the magnesium metal powder obtained by the grinding assembly.

[0008] The overall idea of ​​the magnesium metal powder grinding device provided by the present invention is as follows: In the above-mentioned grinding equipment, the vacuum component is used to maintain the vacuum environment in the box body, so that the grinding of the magnesium metal workpiece is carried out in a vacuum environment, which can not only avoid the situation in which the ground magnesium metal powder is oxidized and affects the subsequent performance during the grinding process of the magnesium metal workpiece, but also avoid the risk of metal dust explosion, and improve the safety of the grinding operation of active metal powder. Furthermore, in the grinding component of the grinding equipment provided by the present invention, a first adjustment mechanism and a second adjustment mechanism are respectively provided. Among them, the first adjustment mechanism controls the moving direction and speed of the grinding wheel, and the second adjustment mechanism controls the pressure applied by the grinding wheel to the magnesium metal workpiece. Based on the above improvements, compared with the traditional manual grinding method, the present invention can combine the characteristics of the magnesium metal workpiece to specifically adjust the grinding speed and grinding pressure, so that the particle size distribution and surface characteristics of the ground magnesium metal powder are kept highly stable and consistent, which not only improves the safety of the grinding process, but also ensures the quality of the magnesium metal powder obtained by grinding.

[0009] Furthermore, the vacuum assembly includes a vacuum pump, an exhaust pipe, a vacuum gauge and a vacuum valve. The vacuum pump and the vacuum gauge are arranged outside the box, and the vacuum pump is provided with an exhaust pipe, one end of which extends into the box, and the other end is connected to the vacuum valve. In the present invention, by opening the vacuum valve, the vacuum pump is used to control the air in the box to be discharged from the exhaust pipe, thereby providing a vacuum environment in the box.

[0010] Furthermore, the clamping assembly includes a third adjustment mechanism, a first clamping plate and a second clamping plate; the third adjustment mechanism controls the relative movement of the first clamping plate and the second clamping plate to clamp the magnesium metal workpiece.

[0011] Furthermore, the third adjustment mechanism includes a third motor, a first bevel gear, a second bevel gear and a stud; the motor shaft of the third motor is connected to the first bevel gear, the first bevel gear and the second bevel gear are meshed with each other, and the second bevel gear is installed on one end of the stud. The stud passes through the first clamping plate and the second clamping plate, and a first external thread is provided at the connection between the stud and the first clamping plate, and a second external thread is provided at the connection between the stud and the second clamping plate, and the first external thread and the second external thread have opposite thread directions, and the first clamping plate and the second clamping plate are respectively provided with internal threads matching the first external thread and the second external thread. When the third motor is started, the motor shaft of the third motor drives the first bevel gear and the second bevel gear to rotate, and then drives the stud to rotate, so that the first clamping plate and the second clamping plate produce relative movement. Preferably, a slideway is provided under the first clamping plate and the second clamping plate, and sliding parts (such as balls or pulleys) are respectively provided at the bottom ends of the first clamping plate and the second clamping plate. Under the action of the third adjustment mechanism, the bottom ends of the first clamping plate and the second clamping plate move along the slideway to adjust the relative position, thereby providing stable clamping for the magnesium metal workpiece.

[0012] Furthermore, the first adjustment mechanism includes a first motor, a screw and a slider; one end of the screw is connected to the first motor, and the other end is installed on the side wall of the box opposite to the first motor; the screw is provided with an external thread, and the slider is provided with an internal thread matching the external thread of the screw, and the slider moves along the screw under the control of the first motor.

[0013] Furthermore, the second adjustment mechanism includes a pressure sensor, a hydraulic adjustment rod and a connecting rod; the hydraulic adjustment rod is installed below the slider, connected to the second motor through the connecting rod, and the motor shaft of the second motor is connected to the grinding wheel. The hydraulic adjustment rod adjusts the length of the movable end of the hydraulic adjustment rod according to the pressure received by the pressure sensor, and controls the grinding pressure of the grinding wheel on the magnesium metal workpiece within a preset range.

[0014] Furthermore, in the present invention, each motor is provided with a motor driver to adjust the rotation direction and speed of the motor.

[0015] Furthermore, the collecting assembly comprises a powder collecting tank and a tank door. The powder collecting tank is connected to the workbench and is used to collect magnesium metal powder obtained by grinding with a grinding wheel, and the tank door is opened at the bottom of the box.

[0016] The technical solution adopted by the present invention to achieve the second purpose is: to provide a method for using the grinding device of magnesium metal powder according to one of the purposes of the present invention, comprising the following steps: S1. Place the magnesium metal workpiece on the workbench of the box through the feed port, and fix and clamp the magnesium metal workpiece through the clamping assembly; S2, close the feed port, start the vacuum component, and put the box into a vacuum environment; S3, start the first motor of the first adjustment mechanism, adjust the initial position of the grinding wheel, set the direction and speed of the grinding wheel moving along the magnesium metal workpiece; start the second motor connected to the grinding wheel, set the speed of the second motor, and use the grinding wheel to grind the magnesium metal workpiece; during the grinding process, control the grinding pressure of the grinding wheel on the magnesium metal workpiece within a preset range through the second adjustment mechanism; S4. Collecting the magnesium metal powder obtained by grinding using a collecting component.

[0017] Furthermore, in step S1, the vacuum degree of the vacuum environment is -0.08 MPa to -0.06 MPa.

[0018] Furthermore, in step S2, the output speed of the first motor of the first adjustment mechanism is 3-4rpm, and the feed speed is 9-12mm / min; the grinding pressure of the grinding wheel on the magnesium metal workpiece is 30-35N; the output speed of the second motor connected to the grinding wheel is 3700-4000rpm, and the linear speed is 25-27m / s.

[0019] In the method for using the magnesium metal powder grinding equipment provided by the present invention, the vacuum degree of the vacuum environment is controlled and grinding is performed under vacuum conditions, which not only avoids the oxidation of the ground magnesium metal powder and affects the subsequent performance, but also avoids the risk of metal dust explosion, thereby improving the safety of active metal powder grinding operations.

[0020] The physical and chemical properties of magnesium metal are different from those of other metals. Magnesium metal is a lightweight metal material with high electrical and thermal conductivity, but it is also very soft and prone to plastic deformation. During the grinding process, if the grinding pressure is too high, the surface quality of the magnesium metal material may deteriorate, and processing defects such as excessive deformation and tearing may occur. At the same time, at higher grinding speeds, surface scratches and other problems are more likely to occur, affecting the quality of the magnesium metal powder obtained by grinding, so the grinding speed and pressure need to be strictly controlled.

[0021] In the method for using the magnesium metal powder grinding device provided by the present invention, the physical and chemical properties of the magnesium metal workpiece are combined to set the grinding speed, the moving speed of the grinding wheel and the grinding pressure to match the magnesium metal workpiece. Through the optimization and adjustment of the above conditions, the magnesium metal powder obtained by grinding in the present invention maintains a high degree of stability and consistency in terms of powder particle size distribution, surface characteristics, etc., which can effectively reduce the subsequent poor performance caused by the quality fluctuation of the magnesium metal powder; on the other hand, compared with the manual grinding operation, the above method of use improves the automation of the equipment, avoids the influence of manual operation on product consistency, and ensures the quality of the magnesium metal powder raw material.

[0022] Compared with the prior art, the present invention has the following beneficial effects: (1) The magnesium metal powder grinding equipment provided by the present invention utilizes a vacuum component to maintain a vacuum environment in a box body, so that the grinding process of the magnesium metal workpiece is carried out in a vacuum environment. This can not only prevent the magnesium metal powder ground from being oxidized during the grinding process of the magnesium metal workpiece and affecting the subsequent use performance, but also avoid the risk of metal dust explosion, thereby improving the safety of the active metal powder grinding operation.

[0023] (2) The first adjustment mechanism and the second adjustment mechanism are respectively provided in the grinding assembly of the magnesium metal powder grinding device provided by the present invention. The first adjustment mechanism controls the moving direction and speed of the grinding wheel, and the second adjustment mechanism controls the pressure applied by the grinding wheel to the magnesium metal workpiece. The provision of the first adjustment mechanism and the second adjustment mechanism enables the present invention to adjust the grinding speed and grinding pressure in a targeted manner in combination with the characteristics of the magnesium metal workpiece, so that the particle size distribution and surface characteristics of the magnesium metal powder obtained by grinding are kept highly stable and consistent, thereby ensuring the quality of the magnesium metal powder obtained by grinding.

[0024] (3) The magnesium metal powder grinding equipment and the method of use provided by the present invention, on the one hand, compared with the traditional manual grinding method, can control the grinding speed and grinding pressure of the grinding wheel on the magnesium metal workpiece during the grinding process, so that the particle size distribution and surface characteristics of the ground magnesium metal powder can maintain a high degree of stability and consistency, which can effectively reduce the subsequent poor performance caused by the quality fluctuation of the magnesium metal powder. On the other hand, it reduces manual operation and improves the degree of automation of the equipment, which has a good promotion and application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic structural diagram of a magnesium metal powder grinding device provided in Example 1 of the present invention; Figure 2 A left side view of a grinding device for magnesium metal powder provided in Example 1 of the present invention; Figure 3 A left side view of a clamping assembly in a magnesium metal powder grinding device provided in Example 2 of the present invention; Figure 4 A left side view of a grinding assembly in a magnesium metal powder grinding device provided in Example 3 of the present invention; Figure 5 A schematic structural diagram of a hydraulic adjustment rod of a grinding assembly in a magnesium metal powder grinding device provided in Example 3 of the present invention; Among them, 1-box; 11-feeding port; 12-workbench; 2-vacuum assembly; 21-vacuum pump; 22-exhaust pipe; 23-vacuum gauge; 24-vacuum valve; 3-clamping assembly; 31-first clamping plate; 32-second clamping plate; 33-third motor; 34-first bevel gear; 35-second bevel gear; 36-stud; 37-slide; 4-grinding assembly; 41-grinding wheel; 42-first motor; 43-screw; 44-slider; 45-pressure sensor; 46-hydraulic adjustment rod; 461-intelligent controller; 462-adjusting spring; 463-valve; 464-sealing ring; 465-liquid storage tube; 466-piston; 467-piston sealing ring; 47-connecting rod; 48-second motor; 5-collecting assembly; 51-collecting tank; 52-tank door; 6-magnesium metal workpiece. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0028] The present invention will be further described below in conjunction with specific embodiments, but the present invention is not limited thereto.

[0029] Example 1 like Figure 1 and 2 As shown, this embodiment provides a magnesium metal powder grinding device, including: a box body 1, a vacuum component 2, a clamping component 3, a grinding component 4 and a collecting component 5.

[0030] The side wall of the box 1 is provided with a feed port 11, and a workbench 12 is provided inside the box 1; the vacuum assembly 2 is used to maintain the vacuum environment inside the box 1; the vacuum assembly 2 includes a vacuum pump 21, an exhaust pipe 22, a vacuum gauge 23 and a vacuum valve 24. The clamping assembly 3 is used to fix the magnesium metal workpiece on the workbench 12; a grinding assembly 4 is provided above the workbench 12; the grinding assembly 4 includes a first adjustment mechanism, a second adjustment mechanism and a grinding wheel 41, the first adjustment mechanism is used to control the moving direction and speed of the grinding wheel 41, and the second adjustment mechanism is used to control the pressure applied by the grinding wheel 41 to the magnesium metal workpiece; the grinding wheel 41 realizes the grinding of the magnesium metal workpiece by rotation; the collecting assembly 5 is provided at the end of the workbench 12, and is used to collect the magnesium metal powder obtained by the grinding assembly 4, and the collecting assembly 5 includes a powder collecting tank 51 and a tank door 52.

[0031] The magnesium metal powder grinding equipment provided in this embodiment uses the vacuum component 2 to maintain the vacuum environment in the box body, so that the grinding process of the magnesium metal workpiece is carried out in a vacuum environment. This can not only avoid the oxidation of the ground magnesium metal powder during the grinding process of the magnesium metal workpiece and affect the subsequent use performance, but also avoid the risk of metal dust explosion, thereby improving the safety of the active metal powder grinding operation.

[0032] In the magnesium metal powder grinding equipment provided in this embodiment, the grinding assembly 4 is provided with a first adjustment mechanism and a second adjustment mechanism, so that the present invention can adjust the grinding speed and grinding pressure in a targeted manner in combination with the characteristics of the magnesium metal workpiece, and maintain a high degree of stability and consistency in terms of the particle size distribution and surface characteristics of the magnesium metal powder obtained by grinding, thereby ensuring the quality of the magnesium metal powder obtained by grinding.

[0033] Example 2 This embodiment provides a grinding device for magnesium metal powder. Based on Embodiment 1, the specific structure of the clamping assembly 3 is designed.

[0034] like Figure 3 As shown, the clamping assembly 3 includes: a third adjustment mechanism, a first clamping plate 31 and a second clamping plate 32; the third adjustment mechanism controls the relative movement of the first clamping plate 31 and the second clamping plate 32 to clamp the magnesium metal workpiece.

[0035] The third adjustment mechanism includes a third motor 33, a first bevel gear 34, a second bevel gear 35 and a stud 36; the motor shaft of the third motor 33 is connected to the first bevel gear 34, the first bevel gear 34 and the second bevel gear 35 are meshed with each other, and the second bevel gear 35 is installed on one end of the stud 36. The stud 36 passes through the first clamping plate 31 and the second clamping plate 32, and a first external thread is provided at the connection between the stud 36 and the first clamping plate 31, and a second external thread is provided at the connection between the stud 36 and the second clamping plate. The thread directions of the first external thread and the second external thread are opposite, and the first clamping plate 31 and the second clamping plate 32 are respectively provided with internal threads matching the first external thread and the second external thread. When the third motor 33 is started, the motor shaft of the third motor 33 drives the first bevel gear 34 and the second bevel gear 35 to rotate, and then drives the stud 36 to rotate, so that the first clamping plate 31 and the second clamping plate 32 produce relative movement. Furthermore, a slideway is provided under the first clamping plate 31 and the second clamping plate 32, and balls are provided at the bottom ends of the first clamping plate 31 and the second clamping plate 32 respectively. Under the action of the third adjustment mechanism, the bottom ends of the first clamping plate 31 and the second clamping plate 32 move along the slideway to adjust the relative position, thereby providing stable clamping for the magnesium metal workpiece.

[0036] Example 3 This embodiment provides a grinding device for magnesium metal powder. On the basis of Embodiment 2, the specific structure of the grinding component 4 is designed.

[0037] like Figure 4 As shown, the first adjustment mechanism includes a first motor 42, a screw 43 and a slider 44; one end of the screw 43 is connected to the first motor 42, and the other end is installed on the side wall of the box body 1 opposite to the first motor 42; the screw 43 is provided with an external thread, and the slider 44 is provided with an internal thread matching the external thread of the screw 43, and the slider 44 moves along the screw 43 under the control of the first motor 42. The second adjustment mechanism includes a pressure sensor 45, a hydraulic adjustment rod 46 and a connecting rod 47; the hydraulic adjustment rod 46 is installed below the slider 44, connected to the second motor 48 through the connecting rod 47, and the motor shaft of the second motor is connected to the grinding wheel 41. The hydraulic adjustment rod 46 adjusts the length of the movable end of the hydraulic adjustment rod 46 according to the pressure received by the pressure sensor 45, and controls the grinding pressure of the grinding wheel 41 on the magnesium metal workpiece within a preset range. Each motor of the present invention is provided with a motor driver to achieve the adjustment of the rotation direction and speed of the motor.

[0038] like Figure 5 As shown, the hydraulic adjustment rod 46 includes an intelligent controller 461, an adjustment spring 462, a valve 463, a sealing ring 464, a liquid storage tube 465, a piston 466, and a piston sealing ring 467. The intelligent controller 461 is connected to the pressure sensor 45 and the hydraulic adjustment rod 46 through a circuit, the upper end of the hydraulic adjustment rod 46 is connected to the adjustment spring 462, the lower end of the adjustment spring 462 is connected to the top of the piston 466, the piston 466 is equipped with a piston sealing ring 467, the lower end of the hydraulic adjustment rod 46 is equipped with a sealing ring 464, the liquid storage tube 465 is installed on both sides of the hydraulic adjustment rod 46, and the valve 463 is installed under the double-sided liquid storage tube 465.

[0039] During the operation of the hydraulic adjustment rod 46, the valves 463 of the liquid storage tubes 465 on both sides are opened to allow the liquid in the liquid storage tubes 465 to flow out from the valves 463. The size of the valve 463 switch is controlled by the intelligent controller 461 to control the liquid outflow from the liquid storage tubes 465 on both sides. The liquid enters the space below the piston 466 to squeeze the piston 466 to move upward, thereby squeezing the upper adjustment spring 462. At the same time, when the reading of the pressure sensor 45 above the hydraulic adjustment rod 46 reaches a predetermined range, the signal is transmitted to the intelligent controller 461, and the intelligent controller 461 outputs the signal to the hydraulic adjustment rod 46, closes the valve 463, stops the liquid in the liquid storage tube 465 from flowing out, and at this time the positions of the adjustment spring 462 and the piston 466 will no longer change. Then the grinding pressure is controlled within a certain range.

[0040] Example 4 This embodiment provides a method for processing magnesium metal powder based on the grinding equipment provided in Embodiment 3, comprising the following steps: Step 1: placing the magnesium metal workpiece 6 on the workbench 12 of the box 1 through the feed port 11, and fixing and clamping the magnesium metal workpiece 6 through the clamping assembly 3; In this embodiment, the magnesium metal workpiece 6 used is obtained by cutting, surface treatment, cleaning and drying of a magnesium block. The length, width and height of the magnesium metal workpiece 6 are 20 cm, 5 cm and 10 cm respectively; the grease on the surface of the cut magnesium metal workpiece is wiped with kerosene using a clean rag dipped in kerosene to ensure that the grease is fully dissolved and removed; then the residual kerosene on the surface of the magnesium metal workpiece is wiped clean with a clean cotton cloth, and then placed in a 15% mass concentration chromic acid solution for 5-10 minutes to dissolve the oxide on its surface, and the magnesium metal workpiece is taken out of the chromic acid solution, rinsed with a large amount of clean water to ensure that the chromic acid solution is completely rinsed off, and then dried.

[0041] Step 2: Close the feed port 11 and start the vacuum assembly 2 to place the box body 1 in a vacuum environment, and the vacuum degree of the vacuum environment is controlled at -0.08 MPa to -0.06 MPa.

[0042] Step 3: Start the first motor 42 of the first adjustment mechanism to adjust the initial position of the grinding wheel and various grinding parameters; start the second motor 48 to start the grinding process; during the grinding process, the grinding pressure of the grinding wheel 41 on the magnesium metal workpiece 6 is controlled within a preset range by the second adjustment mechanism; In this embodiment, the grinding wheel 41 is made of green silicon carbide, with a grinding wheel diameter of 20 cm and a grinding wheel thickness of 5 cm. In the first adjustment mechanism, the pitch of the screw 43 is 0.3 cm. The output speed of the first motor 42 is 3-4 rpm, and the feed speed is 9-12 mm / min. The second adjustment mechanism controls the grinding pressure to be 30-35 N. The output speed of the second motor 48 connected to the grinding wheel 41 is 3700-4000 rpm, and the linear speed is 25-27 m / s. During the grinding process, the grinding wheel 41 is driven by the slider 44 to move along the grinding wheel 41. Figure 1 The surface of the magnesium metal workpiece 6 is ground from left to right; when grinding to the right side of the magnesium metal workpiece 6, the movable end of the hydraulic adjustment rod 46 in the second adjustment mechanism is shortened to lift the grinding wheel 41, and then the first motor 42 is rotated to move the slider 44 on the screw 43 to the left side of the magnesium metal workpiece 6 and restart grinding to the right.

[0043] Step 4: Use the powder collecting slot 51 of the collecting assembly 5 to collect the magnesium metal powder obtained by grinding; open the slot door 52, and the particle size of the obtained magnesium metal powder is 100-300 mesh, and the particle size distribution and surface characteristics of the magnesium metal powder maintain high stability and consistency.

[0044] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the contents of the specification of the present invention should be included in the protection scope of the present invention.

Claims

1. A grinding device for magnesium metal powder, characterized in that: include: A box body (1), a vacuum assembly (2), a clamping assembly (3), a grinding assembly (4) and a collecting assembly (5); A feed port (11) is provided on the side wall of the box (1), and a workbench (12) is provided inside the box (1); the vacuum component (2) is used to maintain a vacuum environment inside the box (1); The clamping assembly (3) is used to fix the magnesium metal workpiece on the workbench (12); a grinding assembly (4) is provided above the workbench (12); The grinding assembly (4) comprises a first adjustment mechanism, a second adjustment mechanism and a grinding wheel (41); the first adjustment mechanism is used to control the moving direction and speed of the grinding wheel (41); the second adjustment mechanism is used to control the magnitude of the pressure applied by the grinding wheel (41) to the magnesium metal workpiece; the grinding wheel (41) grinds the magnesium metal workpiece by rotating; The collecting component (5) is arranged at the end of the workbench (12) and is used to collect the magnesium metal powder obtained by the grinding component (4).

2. The grinding device for magnesium metal powder according to claim 1, characterized in that: The vacuum component (2) comprises a vacuum pump (21), an exhaust pipe (22), a vacuum gauge (23) and a vacuum valve (24).

3. The grinding device for magnesium metal powder according to claim 1, characterized in that: The clamping assembly (3) comprises a third adjustment mechanism, a first clamping plate (31) and a second clamping plate (32); the third adjustment mechanism controls the relative movement of the first clamping plate (31) and the second clamping plate (32) to clamp the magnesium metal workpiece.

4. The grinding device for magnesium metal powder according to claim 1, characterized in that: The first adjustment mechanism comprises a first motor (42), a screw rod (43) and a slider (44); one end of the screw rod (43) is connected to the first motor (42), and the other end is mounted on a side wall of the box body (1) opposite to the first motor (42); the slider (44) moves along the screw rod under the control of the first motor (42).

5. The grinding device for magnesium metal powder according to claim 1, characterized in that: The second adjustment mechanism comprises a pressure sensor (45), a hydraulic adjustment rod (46) and a connecting rod (47); the hydraulic adjustment rod (46) is mounted below the slider (44) and is connected to the second motor (48) via the connecting rod (47); the motor shaft of the second motor (48) is connected to the grinding wheel (41).

6. The grinding device for magnesium metal powder according to claim 5, characterized in that: The hydraulic adjustment rod (46) adjusts the length of the movable end of the hydraulic adjustment rod (46) according to the pressure received by the pressure sensor (45), thereby controlling the grinding pressure of the grinding wheel (41) on the magnesium metal workpiece to be within a preset range.

7. The grinding device for magnesium metal powder according to claim 1, characterized in that: The collecting assembly (5) comprises a powder collecting slot (51) and a slot door (52).

8. A method for using the magnesium metal powder grinding device according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. placing a magnesium metal workpiece (6) on a workbench (12) of a box (1) through a feed port (11), and fixing and clamping the magnesium metal workpiece (6) through a clamping assembly (3); S2, closing the feed port (11), starting the vacuum assembly (2), and placing the box (1) in a vacuum environment; S3, starting the first motor (42) of the first adjustment mechanism to adjust the initial position of the grinding wheel (41), setting the moving direction and moving speed of the grinding wheel (41) along the magnesium metal workpiece (6); starting the second motor (43) connected to the grinding wheel (41), and setting the rotation speed of the second motor (43); using the grinding wheel (41) to grind the magnesium metal workpiece (6); during the grinding process, controlling the grinding pressure of the grinding wheel (41) on the magnesium metal workpiece (6) within a preset range through the second adjustment mechanism; S4. Using a collecting component (5) to collect the magnesium metal powder obtained by grinding.

9. The method of use according to claim 8, characterized in that: In step S1 , the vacuum degree of the vacuum environment is -0.08 MPa to -0.06 MPa.

10. The method of use according to claim 8, characterized in that: In step S2, the output speed of the first motor (42) of the first adjustment mechanism is 3-4 rpm, and the feed speed is 9-12 mm / min; the grinding pressure of the grinding wheel (41) on the magnesium metal workpiece (6) is 30-35 N; the output speed of the second motor (48) connected to the grinding wheel (41) is 3700-4000 rpm, and the linear speed is 25-27 m / s.

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