Magnesium powder preparation device and control method thereof

Abstract

The invention relates to the technical field of metal powder preparation, in particular to a magnesium powder preparation device and a control method thereof.The magnesium powder preparation device comprises a grinding cylinder and further comprises a feeding box fixedly installed at the top of the grinding cylinder; the base is fixedly mounted at the bottom of the grinding cylinder; the conveying mechanism is mounted at the opening of the feeding box and used for conveying the magnesium blocks into the feeding box; the air flow guiding assembly is installed in the feeding box and used for keeping the interior of the feeding box in an inert gas environment through driving of air flow; the surface grinding assembly is used for carrying out surface treatment on the magnesium blocks in an inert gas environment before the magnesium blocks are ground; the grinding assembly is mounted in the grinding cylinder; the control unit is used for controlling starting of the airflow guiding assembly and the surface polishing assembly; according to the device, due to the arrangement of the surface polishing assembly, an oxide layer on the surface of the magnesium material block is polished and stripped, so that the purity of the polished magnesium material block is increased, and the purity of prepared magnesium powder is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of metal powder preparation, in particular to a magnesium powder preparation device and a control method thereof. BACKGROUND

[0002] Magnesium powder preparation refers to a process of processing magnesium raw materials into powder-shaped substances through mechanical grinding, chemical reduction, electrolysis or magnesium vapor condensation, etc., the core of which is to use physical or chemical means to convert magnesium blocks or magnesium-containing compounds into fine particles while controlling particle size, purity and impurity content to meet different application requirements.

[0003] In the prior art, since magnesium reacts with oxygen in the air, the preparation of magnesium powder is carried out in an inert gas environment that does not react with magnesium during the preparation process. However, during the transportation of magnesium into the device, the surface of the transported magnesium still has oxidation, resulting in the prepared powder containing oxide impurities, which affects the quality of the powder preparation. SUMMARY

[0004] The purpose of the present application is to solve the problems existing in the prior art and provide a magnesium powder preparation device and a control method thereof.

[0005] In a first aspect, the present application provides a magnesium powder preparation device, comprising a grinding cylinder, and further comprising: a feed tank fixedly installed at the top of the grinding cylinder; a base fixedly installed at the bottom of the grinding cylinder; a conveying mechanism installed at the opening of the feed tank for conveying magnesium blocks to the inside of the feed tank; an airflow guiding assembly installed inside the feed tank for keeping the inside of the feed tank in an inert gas environment by driving airflow; a surface polishing assembly installed inside the feed tank for surface treatment of magnesium blocks in an inert gas environment before grinding to remove surface oxidation impurities; a grinding assembly installed inside the grinding cylinder for grinding and crushing the pure magnesium blocks after surface treatment; a control unit for controlling the start of the airflow guiding assembly and the surface polishing assembly; The conveying mechanism conveys the magnesium blocks to the inside of the feeding box. The conveying mechanism can be composed of a conveying motor, a conveying roller and a conveying belt. The conveying belt is supported by the conveying roller, and the conveying motor drives the rotation of the conveying roller to drive the transmission of the conveying belt, so as to drive the conveying of the magnesium blocks to the inside of the feeding box. The surface polishing assembly in the feeding box polishes the surface of the magnesium blocks during the conveying and moving of the magnesium blocks, so as to polish and strip the oxide layer on the surface of the magnesium blocks, thereby increasing the purity of the polished magnesium blocks. During the stripping of the surface oxide layer of the magnesium blocks, the inert gas that does not react with magnesium is conveyed into the inside of the feeding box under the action of the airflow guiding assembly. Part of the conveyed inert gas flows upward along the surface polishing assembly and flows to the top opening position of the feeding box, so that the flow of the inert gas avoids the entry of external oxygen into the inside of the feeding box, thereby avoiding the oxidation of the magnesium blocks after the stripping of the oxide layer and the mixing of the oxides, and improving the purity of the magnesium powder. After the surface polishing assembly completes the stripping of the oxide layer on the surface of the magnesium blocks, the grinding assembly grinds the magnesium blocks. The magnesium blocks are ground in the inert gas environment to produce magnesium powder. The control unit can detect the position of the magnesium blocks, so that the surface polishing assembly is started to drive the magnesium blocks when the magnesium blocks move to the specified position, thereby facilitating the smooth stripping of the surface oxide layer of the magnesium blocks.

[0006] Preferably, the surface polishing assembly comprises: A vertical polishing channel vertically arranged in the inside of the feeding box. The magnesium blocks conveyed by the conveying mechanism enter the top of the vertical polishing channel. A plurality of first polishing blocks arranged in a vertical linear array and fixed in the inside of the vertical polishing channel. A first electric push rod fixed to the top of the feeding box, and a first push block fixed to the inside of the vertical polishing channel at the end of the telescopic rod. A horizontal polishing channel horizontally arranged in the inside of the feeding box and in communication with the bottom of the vertical polishing channel at one end. A plurality of second polishing blocks arranged in a horizontal linear array and fixed in the inside of the horizontal polishing channel. A second electric push rod fixed to the side wall of the feeding box, and a second push block fixed to the inside of the horizontal polishing channel at the end of the telescopic rod. A position sensor installed in the inside of the feeding box for identifying the first position and the second position of the magnesium blocks. When the magnesium block enters the top of the vertical polishing channel, the edge of the magnesium block is fitted to the top edge of the vertical polishing channel, and the magnesium block is extruded by the extrusion pad arranged on the side wall of the vertical polishing channel, so as to position the magnesium block by friction. The position sensor detects the position of the magnesium block, and after detecting the position of the magnesium block, the corresponding first electric push rod is controlled to start. After the first electric push rod starts, the first push block is driven to move downward. After the first push block moves downward, the magnesium block is pushed to move downward. In the process of moving downward, the surface of the magnesium block is in contact with the first polishing block. By rapid downward movement of the magnesium block, the surface of the magnesium block is polished by the first polishing block to remove the oxide layer of the four surfaces. Then, the magnesium block moves downward to the bottom of the vertical polishing channel. At this time, the position sensor detects the position of the magnesium block. At this time, the magnesium block is located at the end of the horizontal polishing channel. After detecting the position of the magnesium block, the corresponding second electric push rod is controlled to start. The second electric push rod drives the second push block to move. After the second push block moves, the magnesium block is pushed to move, so that the magnesium block moves through the second polishing block. Similarly, the second polishing block polishes the top and bottom of the magnesium block, so as to remove the oxide layer on the surface of the magnesium block. After the magnesium block moves to the other end of the horizontal polishing channel, the magnesium block after the oxide layer is removed can enter the inside of the grinding assembly for powdering.

[0007] Preferably, the grinding assembly comprises: a second motor fixed to the side wall of the grinding cylinder; a rotating shaft rotatably installed in the inside of the grinding cylinder, the second motor driving the rotating shaft to rotate through an output shaft; a plurality of turning plates fixed to the outer wall of the rotating shaft in a circumferential array, a plurality of accommodation openings being linearly arranged on each of the turning plates; a plurality of grinding media placed in the inside of the grinding cylinder; a collection bin fixed to the bottom of the grinding cylinder and communicating with the inside of the grinding cylinder; a filter plate installed on the top of the collection bin; After the second motor is started, the output shaft connected thereto drives the rotating shaft to rotate. The rotating shaft drives the turning plates to rotate after rotating. The turning plates drive the grinding media and magnesium in the inside of the grinding cylinder to turn, so that the grinding media grind the magnesium in the rolling process, thereby realizing the powdering process. In the powdering process, the magnesium powder with a particle size meeting the particle size requirement passes through the filter plate into the inside of the collection bin, so that the magnesium powder after powdering is automatically separated. The plurality of accommodation openings arranged on the turning plates can be passed through by the grinding media, so that part of the grinding media can pass through the accommodation openings together with the magnesium, so that the grinding media and the magnesium can be ground in the uneven rolling of the grinding cylinder, thereby improving the preparation efficiency of the magnesium powder.

[0008] Preferably, the grinding medium is a silicon nitride ceramic ball; The grinding medium is a silicon nitride ceramic ball, which has a Mohs hardness close to diamond, only inferior to diamond and cubic boron nitride, and has a wear rate of only one ten-thousandth of an hour, so that the grinding consumption is very low, the wear of the grinding medium and the pollution to the grinding material are reduced, and higher-purity ultrafine powder can be obtained.

[0009] Preferably, the grinding assembly further comprises: A plurality of arc-shaped rods are respectively fixed to one side of each of the turnover plates and abut against the inner wall of the grinding cylinder; A grinding plate is fixed to the inner wall of the grinding cylinder, and the two side edges of the arc-shaped rod are arc-shaped to form a pressing angle with the grinding plate; The arc-shaped rod can press the magnesium in the pressing angle formed between the arc-shaped rod and the grinding plate, and the magnesium is pressed and ground between the arc-shaped rod and the grinding plate, so that the grinding efficiency of the magnesium powder is further improved.

[0010] Preferably, the grinding assembly further comprises: A primary crushing bin is fixed to the top of the grinding cylinder and communicates with the transverse grinding channel; A first motor is fixed to the side wall of the primary crushing bin; A primary grinding disc is rotatably installed in the primary crushing bin, the first motor drives the primary grinding disc to rotate, and the second electric push rod pushes the ground magnesium blocks into the primary crushing bin to be pressed against the high-speed rotating primary grinding disc for primary grinding; A falling opening is formed in the bottom of the primary crushing bin and communicates with the top of the grinding cylinder; When the second electric push rod pushes the magnesium blocks to the end of the transverse grinding channel, the first motor is started to make the magnesium blocks approach the high-speed rotating primary grinding disc under the pushing action. The surface of the primary grinding disc is provided with a plurality of cutters, which have a shearing action on the magnesium blocks, so that the approaching magnesium blocks can be preliminarily broken. At this time, the magnesium blocks are separated into small particles, which fall into the grinding cylinder through the falling opening for further powdering, so that the magnesium blocks are prevented from directly entering the grinding cylinder to cause the powder grinding to be difficult to be quickly performed.

[0011] Preferably, the airflow guiding assembly comprises: A gas tank is fixed to the side wall of the feeding tank; A first gas pump is fixed to the side wall of the gas tank, the input end of the first gas pump communicates with an external gas source, and the output end of the first gas pump communicates with the gas tank; a connecting pipe, which is connected between the top of the gas tank and the top of the primary crushing bin; a material falling tank, which is fixed to the bottom of the feeding tank; a round port, which is arranged at the bottom of the vertical polishing channel to communicate with the material falling tank; a rectangular port, which is arranged at the bottom of the horizontal polishing channel to communicate with the material falling tank; a second air pump, which is fixed to the sidewall of the feeding tank, is connected to the material falling tank through an input end, is connected to the top of the vertical polishing channel through an output end, and the inside of the material falling tank is provided with a filter screen at a position communicating with the input end of the second air pump; After the first air pump is started, the inert gas is delivered to the inside of the gas tank, so that the internal pressure of the gas tank is increased, and then the gas flow enters the inside of the primary crushing bin along the connecting pipe. Under the action of part of the gas flow, the primary crushed magnesium is driven into the inside of the grinding cylinder, and the remaining gas flow flows into the inside of the horizontal polishing channel. The second air pump drives the gas in the inside of the material falling tank to flow to the top of the vertical polishing channel, so that the internal pressure of the material falling tank is reduced, thereby causing the gas flow entering the inside of the horizontal polishing channel from the primary crushing bin to flow to the inside of the material falling tank through the rectangular port and the round port, so as to drive the polished and stripped oxide layer into the inside of the material falling tank for collection. The sidewall of the material falling tank is provided with a sealing door, so that the stripped oxide layer can be cleaned. After the second air pump drives the gas flow to enter the top of the vertical polishing channel, the flow direction of the gas flow is divided into several states; In the first state, when the magnesium block does not enter the inside of the vertical polishing channel, the gas flow continuously flows into the inside of the horizontal polishing channel from the inside of the primary crushing bin, so that the gas flow discharged from the top of the vertical polishing channel cannot all flow downward to the position at the bottom of the vertical polishing channel, thereby causing the gas flow discharged from the top of the vertical polishing channel to flow in the reverse direction along the conveying mechanism, so that the inert gas flows along the top of the vertical polishing channel to the inlet direction of the conveying mechanism, thereby forming a one-way gas flow in the inside of the conveying mechanism through the flow of the inert gas, so as to avoid the oxygen entering the inside of the vertical polishing channel to cause the magnesium block after the oxide layer is stripped to be oxidized again; In the second state, when the magnesium block enters the top of the vertical polishing channel, the first polishing block is in extrusion contact with the vertical polishing channel, which blocks the inside of the vertical polishing channel, and temporarily blocks the input end of the second air pump at the top of the vertical polishing channel. At this time, the gas flow flowing into the inside of the horizontal polishing channel from the primary crushing bin can only flow downward to the inside of the material falling tank, so as to promote the stripped oxide layer to enter the inside of the material falling tank for collection; The third state, after the magnesium material block enters the middle part below the vertical polishing channel, the magnesium material block blocks the vertical polishing channel, at this time, the airflow discharged from the top of the vertical polishing channel flows entirely in the direction of the conveying mechanism, and similarly, the airflow flow avoids the entry of external oxygen, and at this time, the grinding process is in progress, and the airflow discharged from the top of the vertical polishing channel flows entirely in the direction of the conveying mechanism, which can achieve the maximum effect of preventing oxygen; The fourth state, when the magnesium material block enters the inside of the horizontal polishing channel, the second air pump extracts the gas in the blanking box and transports it to the inside of the vertical polishing channel, and the gas in the primary crushing bin continuously enters the inside of the blanking box to supplement the gas, so that the vertical polishing channel has an airflow circulation from top to bottom, which promotes the peeled-off oxide layer to enter the inside of the blanking box for collection, and at this time, part of the airflow discharged from the top of the vertical polishing channel flows in the direction of the conveying mechanism, and the state of the airflow gradually approaches the first state. Therefore, by switching the states of the airflow, on the one hand, the airflow effect avoids the entry of oxygen into the inside of the blanking box to cause oxidation, and can increase the airflow flow during the peeling of the oxide layer, further reducing the possibility of oxygen entering, on the other hand, the airflow flow promotes the peeled-off oxide layer to enter the inside of the blanking box for collection to recycle the waste material and avoid resource waste.

[0012] Preferably, the airflow guiding assembly further comprises: A communication box fixed to the inner wall of the gas box and communicating with the gas box; A plurality of U-shaped boxes fixed between each adjacent first polishing block, each U-shaped box communicating with the communication box and being provided with a plurality of one-way air outlet holes on the side facing the inside of the vertical polishing channel; The communication box communicates the U-shaped box with the gas box, so that the airflow can be discharged from the one-way air outlet holes of the gas box to the vertical polishing channel, thereby further transporting the airflow to the inside of the vertical polishing channel for gas replenishment when the magnesium material block blocks the inside of the horizontal polishing channel, to avoid the weakening of the airflow discharged from the top of the vertical polishing channel due to the lack of gas replenishment, resulting in the weakening of the oxygen barrier and the entry of oxygen.

[0013] Preferably, it further comprises: A discharging guide opening fixedly communicated with the bottom of the collection bin; A guide block fixed to the inner wall of the discharging guide opening and having a top inclined surface facing the center of the discharging guide opening; A blocking block arranged in the middle part of the guide block and having a side wall adhering to the bottom inclined surface of the guide block upward, which forms a seal for the position of the guide block when subjected to an upward pulling force; a third electric push rod, fixed inside the collecting bin, driving the blocking block to move vertically via a telescopic rod; a packaging box, placed on top of the base; An opening is provided on the top of the packaging box; An elastic telescopic support rod fixed inside the packaging box; A sealing plate is fixed to the top of the elastic telescopic support rod, with the top pressing and contacting the bottom edge of the opening; After the magnesium powder enters the interior of the collecting bin, the third electric push rod pushes the blocking block to move downward, and the blocking block detaches from the bottom of the guide block. At the same time, the blocking block pushes the sealing plate to move downward to expose the opening. At this time, the magnesium powder passes through the opening under the guidance of the guide block and the blocking block and enters the interior of the packaging box, thereby realizing the sealed packaging of the magnesium powder. After the packaging is completed, the third electric push rod drives the blocking block to move upward and reset, and the blocking block blocks the bottom of the guide block to prevent the entry of oxygen. At the same time, the elastic telescopic support rod pushes the sealing plate to move upward to seal the opening, so that the magnesium powder maintains an inert gas environment during the process of entering the packaging box, which is beneficial to avoid oxidation of the magnesium powder and improve the purity of the magnesium powder preparation.

[0014] In a second aspect, a control method for a magnesium powder preparation device is provided, the control method comprising the following steps: The control unit acquires first position information from the position sensor; The control unit generates first pushing information and first airflow driving information according to the first position information, wherein the first pushing information is used to control the first electric push rod to start, and the first airflow driving information is used to control the airflow guide component to adjust to a weak airflow state within a specified time range; The control unit sends the first pushing information to the surface polishing component and sends the first airflow driving information to the airflow guiding component; The control unit acquires second position information from the position sensor; The control unit generates second pushing information and second airflow driving information according to the second position information, wherein the second pushing information is used to control the second electric push rod to start, and the second airflow driving information is used to control the airflow guide component to adjust to a strong airflow state; The control unit sends the second pushing information to the surface polishing component and sends the second airflow driving information to the airflow guiding component; The weak airflow state and the strong airflow state are two states of airflow velocity, the airflow velocity in the strong airflow state is higher than that in the weak airflow state, and the specific airflow velocities in the weak airflow state and the strong airflow state are manually set values, which are set according to needs; When the magnesium block moves to the top of the vertical polishing channel, it is in the first position, at which time the position sensor generates first position information, the control unit obtains the first position information from the position sensor, and generates first pushing information and first airflow driving information according to the first position information, and then the control unit sends the first pushing information to the surface polishing assembly to control the first electric push rod to start, and sends the first airflow driving information to the airflow guide assembly to control the airflow guide assembly to adjust to a weak airflow state within a specified time range, that is, when the second air pump input end at the top of the vertical polishing channel is temporarily blocked, the airflow delivery efficiency of the first air pump is reduced, the airflow delivered by the primary crushing bin to the inside of the horizontal polishing channel is reduced, and the excessive rise in the air pressure inside the feeding box is avoided; When the magnesium block moves to the bottom of the vertical polishing channel, it is in the second position, at which time the position sensor generates second position information, the control unit obtains the second position information from the position sensor, and generates second pushing information and second airflow driving information according to the second position information, and then the control unit sends the second pushing information to the surface polishing assembly to control the second electric push rod to start, and sends the second airflow driving information to the airflow guide assembly to control the airflow guide assembly to adjust to a strong airflow state to increase the airflow when the magnesium block passes through the vertical polishing channel, so as to increase the flow amount of the airflow and enhance the isolation effect on oxygen.

[0015] Compared with the prior art, the present application has the following beneficial effects: 1. By providing the surface polishing assembly, the oxide layer on the surface of the magnesium block is polished and peeled off, so that the purity of the polished magnesium block is increased, thereby improving the purity of the prepared magnesium powder.

[0016] 2. By providing the airflow guide assembly, external oxygen is prevented from entering the inside of the feeding box, thereby preventing the magnesium block after the oxide layer is peeled off from being oxidized again, and preventing the mixing of oxides, and improving the purity of the prepared magnesium powder.

[0017] 3. By providing the control method, when the second air pump input end at the top of the vertical polishing channel is temporarily blocked, the airflow delivery efficiency of the first air pump is reduced, the airflow delivered by the primary crushing bin to the inside of the horizontal polishing channel is reduced, the excessive rise in the air pressure inside the feeding box is avoided, the airflow is increased when the magnesium block passes through the vertical polishing channel, the flow amount of the airflow is increased, and the isolation effect on oxygen is enhanced. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0019] Figure 2 It is a schematic diagram of the overall structure of the present application. Figure 1Schematic diagram of the enlarged structure at point A in the middle.

[0020] Figure 3 It is a schematic structural diagram of the overall cross-section of the present invention.

[0021] Figure 4 For the present invention Figure 3 Schematic diagram of the enlarged structure at point B in the middle.

[0022] Figure 5 For the present invention Figure 3 Schematic diagram of the enlarged structure at point C in the middle.

[0023] Figure 6 For the present invention Figure 3 Schematic diagram of the enlarged structure at point D in the middle.

[0024] Figure 7 For the present invention Figure 3 Schematic diagram of the enlarged structure at E in the middle.

[0025] Figure: 1, grinding cylinder; 101, feed box; 102, base; 103, conveying mechanism; 2, vertical grinding channel; 201, first grinding block; 202, first push block; 203, first electric push rod; 204, horizontal grinding channel; 205, second grinding block; 206, second push block; 207, second electric push rod; 3, primary crushing chamber; 301, first motor; 302, primary grinding disc; 303, drop port; 4, gas box; 401, first air pump; 402 , connecting pipe; 403, blanking box; 404, round mouth; 405, rectangular mouth; 406, second air pump; 5, connecting box; 501, circular box; 6, flip plate; 601, rotating shaft; 602, second motor; 603, collecting bin; 604, filter plate; 7, arc rod; 8, packaging box; 801, elastic telescopic support rod; 802, sealing plate; 803, blanking guide port; 804, blocking block; 805, guide block; 806, opening; 807, third electric push rod. DETAILED DESCRIPTION

[0026] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0027] like Figures 1 to 7 The magnesium powder preparation device shown includes a grinding cylinder 1 and further includes: The feed box 101 is fixedly mounted on the top of the grinding cylinder 1; The base 102 is fixedly mounted on the bottom of the grinding cylinder 1; The conveying mechanism 103 is installed at the opening of the feed box 101 and is used to convey the magnesium block into the feed box 101; A gas flow guiding assembly is installed in the interior of the feeding box 101, and is used to keep the interior of the feeding box 101 in an inert gas environment by driving of the gas flow; A surface polishing assembly is installed in the interior of the feeding box 101, and is used to perform surface treatment on the magnesium blocks in the inert gas environment before the magnesium blocks are ground, so as to remove surface oxidation impurities; A grinding assembly is installed in the interior of the grinding cylinder 1, and is used to grind and crush the pure magnesium blocks after surface treatment; A control unit is used to control the start of the gas flow guiding assembly and the surface polishing assembly; In the prior art, since magnesium reacts with oxygen in the air, the preparation of magnesium powder is performed in an inert gas environment that does not react with magnesium during the preparation process. However, oxidation still occurs on the surface of the magnesium during the conveying process of the magnesium into the device, which causes the prepared powder to contain oxide impurities, affecting the quality of the powder preparation. The embodiment of the present application can solve the above problems, and the specific implementation is as follows: the conveying mechanism 103 conveys the magnesium blocks into the interior of the feeding box 101. The conveying mechanism 103 can be composed of a conveying motor and a conveying roller and a conveying belt. The conveying roller supports the conveying belt, and the conveying motor drives the conveying roller to rotate, thereby driving the conveying belt to convey the magnesium blocks. The surface polishing assembly in the interior of the feeding box 101 polishes the surface of the magnesium blocks during the conveying and moving process of the magnesium blocks, thereby polishing and stripping the oxidation layer on the surface of the magnesium blocks, so that the purity of the polished magnesium blocks is increased. During the stripping process of the surface oxidation layer of the magnesium blocks, the inert gas that does not react with magnesium is conveyed into the interior of the feeding box 101 under the action of the gas flow guiding assembly. Part of the conveyed inert gas flows upward along the surface polishing assembly and flows to the top opening position of the feeding box 101. Therefore, by flowing of the inert gas, the external oxygen is prevented from entering the interior of the feeding box 101, thereby preventing the magnesium blocks after stripping of the oxidation layer from being oxidized again, and preventing the mixing of oxides, and improving the purity of the prepared magnesium powder. After the surface polishing assembly completes the stripping of the oxidation layer on the surface of the magnesium blocks, the grinding assembly grinds the magnesium blocks. The magnesium blocks are ground in the inert gas environment to prepare magnesium powder. The control unit can detect the position of the magnesium blocks, so that the surface polishing assembly is started to drive the magnesium blocks when the magnesium blocks move to the specified position, thereby facilitating smooth stripping of the surface oxidation layer of the magnesium blocks. It should be noted that when the oxygen is isolated by the inert gas flow, the excluded gas flow can be guided and collected by the external gas flow guiding assembly to avoid the case that the inert gas spreads to the workshop in large quantities and causes safety hazards.

[0028] As an optional embodiment, the surface polishing assembly comprises: A vertical polishing channel 2 is vertically arranged in the interior of the feeding box 101, and the magnesium blocks conveyed by the conveying mechanism 103 enter the top of the vertical polishing channel 2; A plurality of first polishing blocks 201 are arranged in a vertical linear array and are all fixed in the interior of the vertical polishing channel 2; A first electric push rod 203 is fixed on the top of the feeding box 101, and the telescopic rod is fixed with a first push block 202 after extending into the interior of the vertical polishing channel 2; A horizontal polishing channel 204 is horizontally arranged in the interior of the feeding box 101 and is in communication with the bottom of the vertical polishing channel 2 at one end; A plurality of second polishing blocks 205 are arranged in a horizontal linear array and are all fixed in the interior of the horizontal polishing channel 204; A second electric push rod 207 is fixed on the side wall of the feeding box 101, and the telescopic rod is fixed with a second push block 206 after extending into the interior of the horizontal polishing channel 204; A position sensor is installed in the interior of the feeding box 101 and is used to identify the first position and the second position of the magnesium blocks; When the magnesium block enters the top of the vertical polishing channel 2, the edge of the magnesium block is attached to the top edge of the vertical polishing channel 2, and the magnesium block is extruded by the extrusion pad arranged on the side wall of the vertical polishing channel 2, so as to position the magnesium block by friction. The position sensor detects the position of the magnesium block, and after detecting the position of the magnesium block, the corresponding first electric push rod 203 is controlled to start. After the first electric push rod 203 starts, the first push block 202 is driven to move downward. After the first push block 202 moves downward, the magnesium block is pushed to move downward. In the process of moving downward, the surface of the magnesium block is in contact with the first polishing block 201. By rapid downward movement of the magnesium block, the first polishing block 201 polishes the surface of the magnesium block to remove the oxidation layer of the four surfaces. Then, the magnesium block moves downward to the bottom of the vertical polishing channel 2. At this time, the position sensor detects the position of the magnesium block. At this time, the magnesium block is located at the end of the horizontal polishing channel 204. After detecting the position of the magnesium block, the corresponding second electric push rod 207 is controlled to start. The second electric push rod 207 drives the second push block 206 to move. After the second push block 206 moves, the magnesium block is pushed to move, so that the magnesium block moves through the second polishing block 205. Similarly, the second polishing block 205 polishes the top and bottom of the magnesium block, so as to remove the oxidation layer on the surface of the magnesium block. After the magnesium block moves to the other end of the horizontal polishing channel 204, the magnesium block after the oxidation layer is removed can enter the inside of the grinding assembly for powdering.

[0029] As an optional embodiment, the grinding assembly comprises: A second motor 602 is fixed to the side wall of the grinding cylinder 1. A rotating shaft 601 is rotatably installed in the inside of the grinding cylinder 1, and the second motor 602 drives the rotating shaft 601 to rotate through an output shaft. A plurality of turnover plates 6 are fixed to the outer wall of the rotating shaft 601 in a circumferential array, and a plurality of accommodation openings are arranged in a linear array on each turnover plate 6. A plurality of grinding media are placed in the inside of the grinding cylinder 1. A collection bin 603 is fixed to the bottom of the grinding cylinder 1 and is communicated with the inside of the grinding cylinder 1. A filter plate 604 is installed on the top of the collection bin 603. The second motor 602 drives the rotating shaft 601 connected thereto through the output shaft after starting, and the rotating shaft 601 drives the turning plate 6 to rotate after rotating, and the turning plate 6 drives the grinding medium and magnesium in the grinding cylinder 1 to turn after rotating, so that the grinding medium grinds the magnesium in the rolling process, thereby realizing the powder preparation process. In the powder preparation process, the magnesium powder with a particle size meeting the particle size requirement passes through the filter plate 604 and enters the inside of the collection bin 603, so that the prepared magnesium powder is automatically separated. The plurality of accommodation openings provided on the turning plate 6 can allow the grinding medium to pass through, so that part of the grinding medium can pass through the accommodation opening together with the magnesium, so that the grinding medium and the magnesium can be ground in the uneven rolling of the grinding cylinder 1, thereby improving the preparation efficiency of the magnesium powder.

[0030] As an optional embodiment, the grinding medium is a silicon nitride ceramic sphere. The grinding medium is a silicon nitride ceramic sphere, which has a Mohs hardness close to diamond, only second to diamond and cubic boron nitride, and has an abrasion of only one millionth in 24 hours. The grinding consumption is very low, which can reduce the abrasion of the grinding medium and the pollution of the grinding material, and is beneficial to obtain ultrafine powder with higher purity.

[0031] As an optional embodiment, the grinding assembly further comprises: A plurality of arc-shaped rods 7 are respectively fixed to one side of each turning plate 6 abutting the inner wall of the grinding cylinder 1. A grinding plate is fixed to the inner wall of the grinding cylinder 1, and the two side edges of the arc-shaped rod 7 are arc-shaped to form a squeezing angle with the grinding plate. The arc-shaped rod 7 can squeeze the magnesium trapped in the angle under the action of the squeezing angle formed between the arc-shaped rod 7 and the grinding plate, so that the magnesium can be squeezed and ground between the arc-shaped rod 7 and the grinding plate, thereby further improving the grinding efficiency of the magnesium powder.

[0032] As an optional embodiment, the grinding assembly further comprises: The primary crushing bin 3 is fixed to the top of the grinding cylinder 1 and is communicated with the transverse grinding channel 204. The first motor 301 is fixed to the side wall of the primary crushing bin 3. The primary grinding disc 302 is rotatably installed in the inside of the primary crushing bin 3, the first motor 301 drives the primary grinding disc 302 to rotate, and the second electric push rod 207 pushes the ground magnesium blocks into the inside of the primary crushing bin 3 to squeeze the high-speed rotating primary grinding disc 302 for primary grinding. The falling opening 303 is opened in the bottom of the primary crushing bin 3 and is communicated with the top of the grinding cylinder 1. The first motor 301 drives the output shaft to drive the primary grinding disc 302 to rotate at high speed. When the second electric push rod 207 pushes the magnesium block close to the end of the horizontal grinding channel 204, the first motor 301 is started, so that the magnesium block is pushed close to the primary grinding disc 302 rotating at high speed. The surface of the primary grinding disc 302 is provided with a plurality of cutters, which have a shearing effect on the magnesium block, so as to preliminarily crush the approaching magnesium block. At this time, the magnesium block is separated into small particles, which fall along the falling port 303 into the interior of the grinding cylinder 1 for further powdering, thereby avoiding the magnesium block directly entering the interior of the grinding cylinder 1, and causing the powder to be difficult to grind quickly.

[0033] As an optional embodiment, the airflow guiding assembly comprises: a gas tank 4 fixed to the side wall of the feeding tank 101; a first gas pump 401 fixed to the side wall of the gas tank 4, the input end of which is communicated with an external gas source, and the output end of which is communicated with the gas tank 4; a connecting pipe 402 communicated between the top of the gas tank 4 and the top of the primary crushing bin 3; a material falling tank 403 fixed to the bottom of the feeding tank 101; a round port 404 opened in the bottom of the vertical grinding channel 2 to communicate with the material falling tank 403; a rectangular port 405 opened in the bottom of the horizontal grinding channel 204 to communicate with the material falling tank 403; a second gas pump 406 fixed to the side wall of the feeding tank 101, which is communicated with the material falling tank 403 through the input end and communicated with the top of the vertical grinding channel 2 through the output end, and the position of the interior of the material falling tank 403 communicated with the input end of the second gas pump 406 is provided with a filter screen; After the first gas pump 401 is started, the inert gas is delivered to the interior of the gas tank 4, so that the gas pressure in the interior of the gas tank 4 is increased. Then the airflow enters the interior of the primary crushing bin 3 along the connecting pipe 402. Under the action of part of the airflow, the preliminarily crushed magnesium enters the interior of the grinding cylinder 1, and the remaining airflow flows into the interior of the horizontal grinding channel 204. The second gas pump 406 drives the gas in the interior of the material falling tank 403 to flow to the top of the vertical grinding channel 2, so that the gas pressure in the interior of the material falling tank 403 is reduced. Therefore, the airflow entering the interior of the horizontal grinding channel 204 from the primary crushing bin 3 flows to the interior of the material falling tank 403 through the rectangular port 405 and the round port 404, so as to drive the stripped oxide layer to enter the interior of the material falling tank 403 for collection. The side wall of the material falling tank 403 is provided with a sealing door, so that the stripped oxide layer can be cleaned. After the second gas pump 406 drives the airflow to enter the top of the vertical grinding channel 2, the flow direction of the airflow is divided into several states. In the first state, when the magnesium material block does not enter the inside of the vertical polishing channel 2, due to the continuous airflow from the inside of the primary crushing bin 3 to the inside of the horizontal polishing channel 204, the airflow discharged from the top of the vertical polishing channel 2 cannot all flow downward to the bottom position of the vertical polishing channel 2, so that the airflow discharged from the top of the vertical polishing channel 2 flows in the reverse direction along the conveying mechanism 103, so that the inert gas flows in the direction of the inlet of the conveying mechanism 103 along the top of the vertical polishing channel 2, so that the inside of the conveying mechanism 103 forms a one-way airflow by the flow of the inert gas, so as to avoid the oxygen from entering the inside of the vertical polishing channel 2, causing the magnesium material block after the oxidation layer is peeled off to be oxidized again; In the second state, when the magnesium material block enters the top of the vertical polishing channel 2, due to the extrusion contact of the first polishing block 201 and the vertical polishing channel 2, the inside of the vertical polishing channel 2 is blocked, and the input end of the second air pump 406 at the top of the vertical polishing channel 2 is temporarily blocked, at this time, the airflow from the inside of the primary crushing bin 3 to the inside of the horizontal polishing channel 204 can only flow downward to the inside of the material falling box 403, promoting the peeled oxidation layer to enter the inside of the material falling box 403 for collection; In the third state, after the magnesium material block enters below the middle of the vertical polishing channel 2, the magnesium material block blocks the vertical polishing channel 2, at this time, the airflow discharged from the top of the vertical polishing channel 2 all flows in the direction of the conveying mechanism 103, and for the same reason, the entry of external oxygen is avoided by the flow of the airflow, and at this time, the grinding process is in progress, and the airflow discharged in the direction of the conveying mechanism 103 can achieve the maximum effect of hindering oxygen; In the fourth state, when the magnesium material block enters the inside of the horizontal polishing channel 204, the second air pump 406 draws the gas in the inside of the material falling box 403 to the inside of the vertical polishing channel 2, and the inside of the material falling box 403 is continuously entered by the gas in the inside of the primary crushing bin 3 for gas replenishment, so that the vertical polishing channel 2 has an airflow circulation from top to bottom, under the action of the airflow circulation, the peeled oxidation layer is promoted to enter the inside of the material falling box 403 for collection, and at this time, the state of the airflow gradually approaches the first state; Therefore, by switching the various states of the airflow, on the one hand, the entry of oxygen into the inside of the feeding box 101 is avoided by the action of the airflow, and the airflow flow is increased during the peeling of the oxidation layer, further reducing the possibility of oxygen entering, on the other hand, the peeled oxidation layer is promoted to enter the inside of the material falling box 403 for collection by the flow of the airflow, so as to recycle the waste material and avoid resource waste.

[0034] As an optional embodiment, the airflow guiding assembly further comprises: The communication box 5 is fixed to the inner wall of the gas box 4 and communicates with the gas box 4; The plurality of U-shaped boxes 501 are respectively fixed between each adjacent first polishing block 201, and each U-shaped box 501 communicates with the communication box 5 and is provided with a plurality of one-way exhaust holes on the side facing the inside of the vertical polishing channel 2. The communication box 5 communicates the U-shaped box 501 with the gas box 4, so that the gas flow can be discharged from the one-way exhaust hole of the gas box 4 to the vertical polishing channel 2, thereby further conveying the gas flow to the inside of the vertical polishing channel 2 for gas replenishment when the magnesium block blocks the inside of the horizontal polishing channel 204, so as to avoid the weakening of the gas flow at the top of the vertical polishing channel 2 after no gas replenishment, resulting in the weakening of the oxygen barrier to cause the oxygen to penetrate.

[0035] As an optional embodiment, further comprising: The discharging guide opening 803 is fixed to the bottom of the collection bin 603; The guide block 805 is fixed to the inner wall of the discharging guide opening 803, and the top inclined surface faces the center of the discharging guide opening 803; The blocking block 804 is arranged at the middle part of the guide block 805, and the side wall is attached to the bottom inclined surface of the guide block 805 upwardly, and forms a seal to the position of the guide block 805 when subjected to upward pulling force; The third electric push rod 807 is fixed to the inside of the collection bin 603 and drives the blocking block 804 to move vertically through the telescopic rod; The sub-packaging box 8 is placed on the top of the base 102; The opening 806 is arranged on the top of the sub-packaging box 8; The elastic telescopic supporting rod 801 is fixed to the inside of the sub-packaging box 8; The sealing plate 802 is fixed to the top of the elastic telescopic supporting rod 801 and is in contact with the bottom edge of the opening 806 by extrusion; After the magnesium powder enters the inside of the collection bin 603, the third electric push rod 807 drives the blocking block 804 to move downwardly, the blocking block 804 is separated from the bottom of the guide block 805, and the blocking block 804 drives the sealing plate 802 to move downwardly to expose the opening 806, at this time, the magnesium powder passes through the opening 806 to enter the inside of the sub-packaging box 8 under the guidance of the guide block 805 and the blocking block 804, thereby realizing the sealed sub-packaging of the magnesium powder, after the sub-packaging is completed, the third electric push rod 807 drives the blocking block 804 to move upwardly to reset, the blocking block 804 seals the bottom of the guide block 805, thereby avoiding the entry of oxygen, and at the same time, the elastic telescopic supporting rod 801 drives the sealing plate 802 to move upwardly to seal the opening 806, so that the magnesium powder enters the sub-packaging box 8 in an inert gas environment, thereby being beneficial to avoid the oxidation of the magnesium powder to improve the purity of the prepared magnesium powder.

[0036] A control method for a magnesium powder preparation device, the control method comprising the following steps: The control unit obtains first position information from the position sensor; The control unit generates first pushing information and first airflow driving information according to the first position information, wherein the first pushing information is used to control the activation of the first electric push rod 203, and the first airflow driving information is used to control the airflow guiding component to adjust to a weak airflow state within a specified time range; The control unit sends the first pushing information to the surface polishing component and sends the first airflow driving information to the airflow guiding component; The control unit obtains second position information from the position sensor; The control unit generates second pushing information and second airflow driving information according to the second position information, the second pushing information is used to control the second electric push rod 207 to start, and the second airflow driving information is used to control the airflow guide component to adjust to a strong airflow state; The control unit sends the second pushing information to the surface polishing component and sends the second airflow driving information to the airflow guiding component; Among them, the weak airflow state and the strong airflow state are two states of airflow velocity. The airflow velocity in the strong airflow state is higher than that in the weak airflow state. The specific airflow velocities in the weak airflow state and the strong airflow state are manually set values ​​and are set according to needs. When the magnesium block moves to the top of the vertical grinding channel 2, it is in the first position. At this time, the position sensor generates first position information. The control unit obtains the first position information from the position sensor and generates first pushing information and first airflow driving information according to the first position information. Then the control unit sends the first pushing information to the surface grinding assembly to control the first electric push rod 203 to start, and sends the first airflow driving information to the airflow guiding assembly to control the airflow guiding assembly to adjust to a weak airflow state within a specified time range. That is, when the input end of the second air pump 406 at the top of the vertical grinding channel 2 is temporarily blocked, the airflow conveying efficiency of the first air pump 401 is weakened to reduce the amount of air delivered from the primary crushing bin 3 to the inside of the horizontal grinding channel 204, so as to avoid excessive increase in the air pressure inside the feed box 101. When the magnesium block moves to the bottom of the vertical grinding channel 2, it is in the second position. At this time, the position sensor generates second position information. The control unit obtains the second position information from the position sensor and generates second push information and second airflow driving information based on the second position information. The control unit then sends the second push information to the surface grinding component to control the start of the second electric push rod 207, and sends the second airflow driving information to the airflow guiding component to control the airflow guiding component to adjust to a strong airflow state, so as to increase the airflow when the magnesium block passes through the vertical grinding channel 2, so as to increase the flow rate of the airflow and enhance the isolation effect on oxygen.

[0037] The working principle of the present application is that the conveying mechanism 103 conveys the magnesium blocks to the inside of the feeding box 101, and the conveying mechanism 103 can be composed of a conveying motor and a conveying roller and a conveying belt, the conveying belt is supported by the conveying roller, the conveying motor drives the conveying roller to rotate, thereby driving the conveying belt to drive the conveying belt to convey the magnesium blocks, so that the magnesium blocks enter the inside of the feeding box 101, and the surface polishing assembly in the inside of the feeding box 101 polishes the surface of the magnesium blocks during conveying and moving of the magnesium blocks, thereby polishing and stripping the oxide layer on the surface of the magnesium blocks, so that the purity of the polished magnesium blocks is increased, and during stripping of the surface oxide layer of the magnesium blocks, under the action of the airflow guiding assembly, the inert gas that does not react with magnesium is conveyed to the inside of the feeding box 101, part of the conveyed inert gas flows upward along the surface polishing assembly and flows to the top opening position of the feeding box 101, thereby avoiding the entry of external oxygen into the inside of the feeding box 101 through the flow of inert gas, thereby facilitating the avoidance of the re-oxidation of the magnesium blocks after the stripping of the oxide layer, thereby facilitating the avoidance of the mixing of oxides and the improvement of the purity of the magnesium powder preparation. After the surface polishing assembly completes the stripping of the oxide layer on the surface of the magnesium blocks, the grinding assembly grinds the magnesium blocks, and the magnesium blocks are ground to form magnesium powder in the inert gas environment. The control unit can detect the position of the magnesium blocks, thereby controlling the corresponding position of the surface polishing assembly to start driving the magnesium blocks when the magnesium blocks move to the specified position, thereby facilitating the smooth stripping of the oxide layer on the surface of the magnesium blocks.

[0038] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A magnesium powder preparation device, comprising a grinding cylinder (1), characterized in that: Also includes: A feed box (101) is fixedly mounted on the top of the grinding cylinder (1); A base (102) is fixedly mounted on the bottom of the grinding cylinder (1); A conveying mechanism (103) is installed at the opening of the feed box (101) and is used to convey the magnesium block into the interior of the feed box (101); An airflow guide assembly is installed inside the feed box (101) and is used to maintain the interior of the feed box (101) in an inert gas environment through the driving of the airflow; A surface grinding assembly is installed inside the feed box (101) and is used to perform surface treatment on the magnesium block in an inert gas environment before grinding to remove surface oxidized impurities; A grinding assembly is installed inside the grinding cylinder (1) and is used to grind and crush the pure magnesium block after surface treatment; A control unit is used to control the start-up of the airflow guide assembly and the surface polishing assembly.

2. A magnesium powder preparation device according to claim 1, characterized in that: The surface grinding assembly comprises: A vertical grinding channel (2) is vertically arranged inside the feed box (101), and the magnesium block conveyed by the conveying mechanism (103) enters the top of the vertical grinding channel (2); A plurality of first grinding blocks (201) are arranged in a vertical linear array and are all fixed inside the vertical grinding channel (2); A first electric push rod (203) is fixed to the top of the feed box (101), and a first push block (202) is fixed after the telescopic rod extends to the inside of the vertical grinding channel (2); A transverse grinding channel (204) is transversely arranged inside the feed box (101), with one end communicating with the bottom of the vertical grinding channel (2); A plurality of second grinding blocks (205) are arranged in a transverse linear array and are all fixed inside the transverse grinding channel (204); A second electric push rod (207) is fixed on the side wall of the feed box (101), and a second push block (206) is fixed after the telescopic rod extends to the inside of the transverse grinding channel (204); A position sensor is installed inside the feed box (101) and is used to identify the first position and the second position of the magnesium block.

3. A magnesium powder preparation device according to claim 2, characterized in that, The grinding assembly comprises: A second motor (602) is fixed on the side wall of the grinding cylinder (1); A rotating shaft (601) is rotatably mounted inside the grinding cylinder (1), and the second motor (602) drives the rotating shaft (601) to rotate via an output shaft; A plurality of flip plates (6) are fixed to the outer wall of the rotating shaft (601) in a circular array, and each of the flip plates (6) is provided with a plurality of openings in a linear array; A plurality of grinding media are placed inside the grinding cylinder (1); A collecting chamber (603) is fixed to the bottom of the grinding cylinder (1) and is connected to the interior of the grinding cylinder (1); The filter plate (604) is installed on the top of the collection chamber (603).

4. A magnesium powder preparation device according to claim 3, characterized in that: The grinding medium is a silicon nitride ceramic sphere.

5. A magnesium powder preparation device according to claim 3, characterized in that: The grinding assembly further comprises: A plurality of arc-shaped rods (7) are respectively fixed to one side of each of the flip plates (6) that is in contact with the inner wall of the grinding cylinder (1); The grinding plate is fixed on the inner wall of the grinding cylinder (1), and the edges on both sides of the arc-shaped rod (7) are arc-shaped to form an extrusion angle with the grinding plate.

6. A magnesium powder preparation device according to claim 3, characterized in that: The grinding assembly further comprises: A primary crushing chamber (3) is fixed to the top of the grinding cylinder (1) and is connected to the transverse grinding channel (204); A first motor (301) is fixed on the side wall of the primary crushing bin (3); A primary grinding disc (302) is rotatably mounted inside the primary crushing bin (3); the first motor (301) drives the primary grinding disc (302) to rotate; the second electric push rod (207) pushes the ground magnesium block into the primary crushing bin (3) to squeeze the high-speed rotating primary grinding disc (302) for primary grinding; The drop port (303) is opened at the bottom of the primary crushing bin (3) and is connected to the top of the grinding cylinder (1).

7. A magnesium powder preparation device according to claim 6, characterized in that: The airflow guide assembly comprises: A gas box (4) is fixed on the side wall of the feed box (101); A first air pump (401) is fixed to the side wall of the gas box (4), with its input end connected to an external gas source and its output end connected to the gas box (4); A connecting pipe (402) is connected between the top of the gas box (4) and the top of the primary crushing bin (3); A blanking box (403) is fixed to the bottom of the feed box (101); A circular opening (404) is provided at the bottom of the vertical grinding channel (2) to communicate with the blanking box (403); A rectangular opening (405) is provided at the bottom of the transverse grinding channel (204) to communicate with the blanking box (403); The second air pump (406) is fixed on the side wall of the feed box (101), connected to the blanking box (403) through the input end, and connected to the top of the vertical grinding channel (2) through the output end, and a filter is provided at the position where the interior of the blanking box (403) is connected to the input end of the second air pump (406).

8. A magnesium powder preparation device according to claim 7, characterized in that: The airflow guide assembly further includes: A connecting box (5) is fixed on the inner wall of the gas box (4) and is connected to the gas box (4); A plurality of circular boxes (501) are respectively fixed between adjacent first grinding blocks (201), the circular boxes (501) are all connected to the connecting box (5), and a plurality of one-way exhaust holes are provided on one side of the circular boxes (501) facing the interior of the vertical grinding channel (2).

9. A magnesium powder preparation device according to claim 3, characterized in that: Also includes: A material discharge guide port (803) is fixedly connected to the bottom of the collecting bin (603); A guide block (805) is fixed on the inner wall of the blanking guide opening (803), with the top inclined surface facing the center of the blanking guide opening (803); The blocking block (804) is arranged in the middle of the guide block (805), and the side wall is upwardly contacted with the bottom inclined surface of the guide block (805), and forms a seal on the position of the guide block (805) when subjected to an upward pulling force; A third electric push rod (807) is fixed inside the collecting bin (603) and drives the blocking block (804) to move vertically via a telescopic rod; A packaging box (8) is placed on top of the base (102); An opening (806) is provided at the top of the packaging box (8); An elastic telescopic support rod (801) is fixed inside the packaging box (8); The sealing plate (802) is fixed to the top of the elastic telescopic support rod (801), and the top thereof is pressed and contacts the bottom edge of the opening (806).

10. A control method for a magnesium powder preparation device, applicable to a magnesium powder preparation device according to any one of claims 2 to 9, characterized in that: The control method comprises the following steps: The control unit acquires first position information from the position sensor; The control unit generates first pushing information and first airflow driving information according to the first position information, the first pushing information is used to control the first electric push rod (203) to start, and the first airflow driving information is used to control the airflow guiding component to adjust to a weak airflow state within a specified time range; The control unit sends the first pushing information to the surface polishing component and sends the first airflow driving information to the airflow guiding component; The control unit acquires second position information from the position sensor; The control unit generates second pushing information and second airflow driving information according to the second position information, the second pushing information is used to control the start of the second electric push rod (207), and the second airflow driving information is used to control the airflow guiding component to adjust to a strong airflow state; The control unit sends the second pushing information to the surface polishing component and sends the second airflow driving information to the airflow guiding component; Among them, the weak airflow state and the strong airflow state are two states of airflow velocity. The airflow velocity in the strong airflow state is higher than that in the weak airflow state, and the specific airflow velocities in the weak airflow state and the strong airflow state are artificially set values, which are set according to needs.

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