Grinding machine and grinding method thereof

Abstract

The present application relates to the technical field of grinding equipment, and discloses a grinding machine and a grinding method thereof, the grinding machine comprising a main body and a sound wave generator, the inside of the main body being provided with a grinding cavity and an inlet channel, the grinding cavity being annular, one end of the inlet channel being communicated with the grinding cavity, and the other end forming a feeding port, the material to be ground being placed in the grinding cavity, the sound wave generator arranged at the feeding port inputting variable frequency sound waves into the grinding cavity, the sound waves resonating in the annular grinding cavity, the material to be ground gathering at the position where resonance occurs and dispersing at the position where there is no resonance, the resonance formed by the sound waves changing with the change of the frequency of the sound waves, so that the material to be ground gathers and disperses to rub against each other, thereby realizing the grinding of the material. The grinding machine and the grinding method thereof are suitable for small-scale material grinding, the material rubbing against each other through the action of the sound waves, the main body not needing to rotate, the fixing difficulty of the main body being reduced, and the problem of dislocation easily occurring due to large centrifugal force being avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of grinding equipment, in particular to a grinding machine and a grinding method thereof. BACKGROUND

[0002] A ball mill is a device for regrinding, refining or spheroidizing a crushed material. A traditional ball mill generally has a cylinder into which a certain number of steel balls are loaded as grinding media. The cylinder is rotated to make the grinding media and the material rotate together in the cylinder, so as to realize regrinding, refinement or spheroidization of the material by mechanical rotation. This grinding method is mainly used for grinding and crushing large or large batches of materials. For small materials, such as 3D printing powder material preparation, the ball mill is miniaturized to perform powder spheroidization and small block material crushing and spheroidization. However, the traditional ball mill still has many shortcomings after miniaturization. During grinding, multiple cylinders need to rotate around a certain circumference while rotating themselves. The power required to drive the ball mill to operate is relatively large. The centrifugal force during grinding is large, which is prone to dislocation. The vibration is large. The fixing operation of the cylinder is laborious and difficult to operate, which is not conducive to the full grinding of the material. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application proposes a grinding machine which can solve the shortcomings of using a traditional ball mill to grind small materials and is conducive to the full grinding of the material. The present application also proposes a grinding method for grinding materials using the above grinding machine.

[0004] According to the grinding machine of the first aspect of the present application, the grinding machine comprises a main body and a sound wave generator. The inside of the main body is provided with a grinding cavity and an inlet channel. The grinding cavity is annular and is used to accommodate the material to be ground. One end of the inlet channel is communicated with the grinding cavity, and the other end forms a feeding port. The sound wave generator is arranged at the feeding port and is detachably connected to the main body. The sound wave generator is used to input variable frequency sound waves into the grinding cavity.

[0005] The grinder of the first aspect of the present application has at least the following advantages: the material to be ground can be placed in the grinding cavity, and when the acoustic wave generator arranged at the feeding port is started, the acoustic wave can be input into the grinding cavity through the inlet channel. Under the action of the variable frequency acoustic wave, the acoustic wave resonates in the annular grinding cavity, the material to be ground gathers at the position where the resonance occurs and disperses at the position where the resonance does not occur, and the resonance formed by the acoustic wave changes with the change of the frequency of the acoustic wave, for example, the position, intensity and mode of the resonance change with the change of the frequency of the acoustic wave, so that the material to be ground gathers and disperses to rub against each other, thereby achieving the grinding of the material. The grinder of the present application is suitable for small-scale material grinding, and the material rubs against each other under the action of the acoustic wave, so the main body does not need to rotate, the fixing difficulty of the main body is reduced, and the problem of dislocation caused by large centrifugal force is avoided.

[0006] According to the grinder of some embodiments of the present application, the inlet channel is linear, and the inlet channel is tangent to the grinding cavity.

[0007] According to the grinder of some embodiments of the present application, the inner diameter of the inlet channel is equal to the inner diameter of the grinding cavity.

[0008] According to the grinder of some embodiments of the present application, the main body is further provided with an air inlet and an air outlet, the air inlet and the air outlet are respectively communicated with different positions of the grinding cavity, the air inlet is suitable for connecting to a gas source to input gas into the grinding cavity, and the air outlet is used to exhaust the gas in the grinding cavity.

[0009] According to the grinder of some embodiments of the present application, the grinder further comprises an air inlet pipe, the air inlet pipe has an air inlet channel inside, one end of the air inlet pipe is connected to the main body at the air inlet, and the air inlet channel is communicated with the grinding cavity; and / or, the grinder further comprises an air outlet pipe, the air outlet pipe has an air outlet channel inside, one end of the air outlet pipe is connected to the main body at the air outlet, and the air outlet channel is communicated with the grinding cavity.

[0010] According to the grinder of some embodiments of the present application, the main body comprises a bearing platform, an annular pipe and a connecting pipe, the annular pipe is connected to the bearing platform, the annular pipe is hollow inside to form the grinding cavity, the connecting pipe is hollow inside to form the inlet channel, one end of the connecting pipe is connected to the annular pipe, and the other end forms the feeding port, the acoustic wave generator blocks the feeding port and is detachably connected to the connecting pipe.

[0011] According to the grinding machine of some embodiments of the present application, the connecting pipe is provided with a first threaded part at one end of the feeding port, and the acoustic wave generator is provided with a second threaded part capable of being connected with the first threaded part, and the acoustic wave generator and the connecting pipe are detachably connected through the first threaded part and the second threaded part.

[0012] According to the grinding machine of some embodiments of the present application, the bearing platform comprises a base and a plurality of supporting members, the supporting members are connected to the bottom of the annular pipe, and the plurality of supporting members are respectively supported at different positions of the annular pipe.

[0013] According to the grinding method of the second aspect of the present application, the method comprises:

[0014] The grinding machine of the first aspect of the present application is configured.

[0015] The material to be ground is added into the grinding cavity, and the acoustic wave generator is installed at the feeding port.

[0016] The acoustic wave generator inputs the variable frequency acoustic wave into the grinding cavity through the inlet channel to cause the resonance change in the grinding cavity, and the material to be ground is rubbed with each other along with the resonance change.

[0017] The grinding method of the second aspect of the present application has at least the following beneficial effects: under the action of the variable frequency acoustic wave, the acoustic wave resonates in the annular grinding cavity, the material to be ground is gathered at the position where the resonance occurs and is dispersed at the position where the resonance does not occur, and the resonance formed by the acoustic wave changes along with the change of the frequency of the acoustic wave, for example, the position, intensity and mode of the resonance change along with the change of the frequency of the acoustic wave, thereby the material to be ground is gathered and dispersed to be rubbed with each other, and the grinding of the material is realized. The grinding machine of the present application is suitable for small-scale material grinding, the material is rubbed with each other by the action of the acoustic wave, the main body does not need to rotate, the fixing difficulty of the main body is reduced, and the problem of dislocation caused by large centrifugal force is avoided.

[0018] According to the grinding method of some embodiments of the present application, inert gas is introduced into the grinding cavity.

[0019] Additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The structure diagram of the grinding machine of an embodiment of the present application;

[0021] Figure 2 The schematic diagram of the arrangement of the foam particles in a closed straight pipe under the influence of the acoustic wave resonance at a certain acoustic frequency;

[0022] Figure 3 Exploded view of a grinder according to an embodiment of the present application;

[0023] Figure 4 Structure of a ring pipe and a connecting pipe in a grinder according to an embodiment of the present application;

[0024] Figure 5 Top view of another structure of a ring pipe and a connecting pipe in a grinder according to an embodiment of the present application;

[0025] Figure 6 Diagram showing that a ring pipe resonates at a first frequency according to simulation;

[0026] Figure 7 Diagram showing that a ring pipe resonates at a second frequency according to simulation;

[0027] Figure 8 Diagram showing that a ring pipe resonates at a third frequency according to simulation;

[0028] Figure 9 Diagram showing that a ring pipe resonates at a fourth frequency according to simulation;

[0029] Figure 10 Diagram showing that a ring pipe resonates at a fifth frequency according to simulation;

[0030] Figure 11 Diagram showing that a ring pipe resonates at a sixth frequency according to simulation;

[0031] Figure 12 Diagram showing that a ring pipe resonates at a seventh frequency according to simulation;

[0032] Figure 13 Diagram showing that a ring pipe resonates at an eighth frequency according to simulation;

[0033] Figure 14 Diagram showing that a ring pipe resonates at a ninth frequency according to simulation.

[0034] Reference signs:

[0035] Body 100, grinding cavity 101, inlet channel 102, feed inlet 103, air inlet 104, air inlet pipe 105, air outlet 106, air outlet pipe 107, carrying platform 108, ring pipe 109, connecting pipe 110, base 111, support 112, first threaded portion 113, arc-shaped groove 114;

[0036] Acoustic wave generator 200, second threaded portion 201, foam particles 300, straight pipe 400. DETAILED DESCRIPTION

[0037] The concept and the technical effects of the present application will be described in detail below in combination with the embodiments so as to fully understand the objects, features and effects of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort shall fall within the scope of the present application.

[0038] In the description of the embodiments of the present application, if the orientation description such as "upper", "lower", "front", "back", "left", "right" and the like is referred to, the orientation or position relationship shown based on the drawings is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or the apparatus must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0039] In the description of the embodiments of the present application, if a feature is referred to as "set", "fixed", "connected", "mounted" on another feature, it can be directly set, fixed, connected or mounted on the other feature, or indirectly set, fixed, connected or mounted on the other feature. In the description of the embodiments of the present application, if "several" is referred to, it means more than one, if "multiple" is referred to, it means more than two, and if "greater than", "less than", "exceed" is referred to, it shall be understood as not including the number itself. If "above", "below", "within" is referred to, it shall be understood as including the number itself. If "first", "second" is referred to, it shall be understood as being used to distinguish technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0040] The embodiments of the present application provide a grinding machine and a grinding method thereof, wherein the main body of the grinding machine contains the material to be ground through an annular grinding cavity, a sound wave generator inputs variable frequency sound waves into the grinding cavity, the resonance generated by the sound waves in the grinding cavity changes with the change of the frequency of the sound waves, and the positions of the gathered and dispersed material to be ground change accordingly, so as to realize the mutual friction between the materials and achieve grinding. The embodiments of the present application will be introduced below in combination with the drawings of the specification:

[0041] Figure 1 The structure of the grinding machine of the embodiments of the present application is shown in the figure, and the grinding method thereof is shown in the figure Figure 1The first aspect embodiment of the present application provides a grinder, which comprises a main body 100 and a sound wave generator 200, the inside of the main body 100 is provided with a grinding cavity 101 and an inlet channel 102, the grinding cavity 101 is annular and used for accommodating materials to be ground, one end of the inlet channel 102 is communicated with the grinding cavity 101, and the other end forms a feeding port 103, through which the materials to be ground can enter the grinding cavity 101. The sound wave generator 200 is arranged at the feeding port 103 and detachably connected to the main body 100, and is used for inputting variable-frequency sound waves into the grinding cavity 101. During grinding, the materials to be ground can be placed in the grinding cavity 101, and when the sound wave generator 200 arranged at the feeding port 103 is started, sound waves can be input into the grinding cavity 101 through the inlet channel 102.

[0042] It can be understood that the sound wave is a mechanical wave, which is often propagated in the form of a longitudinal wave and resonates under certain closed space and frequency. At this time, in the place with low resonant sound intensity, the gas is in a cavitation state (low density), and in the place with high sound intensity, the gas is in a compression state, and often appears in intervals. The resonance of the sound wave can make the powder or small block vibrate and gather at the position where the resonance occurs and disperse at the position where the resonance does not occur. Figure 2 It should be noted that, Figure 2 The picture is obtained by experiments of loading foam particles 300 in a closed straight pipe 400 and is only used for assisting in describing the influence of sound wave resonance on the particles and does not belong to the structure of the grinder of the present application. The foam particles 300 are arranged in a specific form and continuously vibrate under the influence of sound wave resonance in the closed straight pipe 400 under a certain sound frequency.

[0043] During grinding, the grinder of the embodiment of the present application adds appropriate materials to be ground (powder or small block) in the grinding cavity 101, and then applies sound waves which are continuously exchanged and changed among a plurality of vibration frequencies. Under the action of the variable-frequency sound waves, the sound waves resonate in the annular grinding cavity 101, the materials to be ground gather at the position where the resonance occurs and disperse at the position where the resonance does not occur, the resonance formed by the sound waves changes with the change of the frequency of the sound waves, for example, the position, intensity and mode of the resonance change with the change of the frequency of the sound waves, so as to drive the materials to be ground to gather and disperse, so as to realize the grinding of the materials by mutual friction in the movement process. In addition, the vibration of air molecules brings the vibration between the particles of the material powder, so that the material powder can be more fully ground.

[0044] The annular structure of the grinding cavity 101 can reduce the consumption of sound, facilitate the circular propagation of sound waves, and avoid the materials to be ground from avoiding the resonance area, which is beneficial to the full grinding of the materials and improves the grinding efficiency and grinding quality.

[0045] In addition, the grinding machine of the embodiment of the present application is suitable for small material grinding. The materials are rubbed by the action of the sound waves, and the main body 100 does not need to rotate, thereby reducing the fixing difficulty of the main body 100 and avoiding the problem of dislocation caused by large centrifugal force.

[0046] In the grinding machine of some embodiments, the inlet channel 102 can be linear, and the inlet channel 102 is tangent to the grinding cavity 101, so that the sound waves generated by the sound wave generator 200 installed at the feeding port 103 can enter the grinding cavity 101 through the inlet channel 102, thereby reducing the consumption of the sound waves. The inner diameter of the inlet channel 102 and the inner diameter of the grinding cavity 101 can be equal, which is convenient for manufacturing and is beneficial to obtain the resonance frequency of the sound waves under the condition of the grinding cavity 101 and the inlet channel 102.

[0047] Figure 5 FIG. 6 is a top view of another structure of the annular pipe and the connecting pipe of the grinding machine of the embodiment of the present application, referring to FIG. Figure 1 and Figure 5 In addition, the main body 100 can be further provided with an air inlet 104 and an air outlet 106, which are respectively communicated with different positions of the grinding cavity 101. The air inlet 104 is suitable for connecting to a gas source to introduce gas into the grinding cavity 101, and the air outlet 106 is used to exhaust the gas in the grinding cavity 101. In this way, inert gas (such as high-purity argon) can be introduced into the grinding cavity 101 to provide isolation protection during ball milling, thereby avoiding the explosion of the powder caused by the heating of the ball milling.

[0048] Specifically, the grinding machine further comprises an air inlet pipe 105, the inside of the air inlet pipe 105 has an air inlet channel, one end of the air inlet pipe 105 is connected to the main body 100 at the air inlet 104, and the air inlet channel is communicated with the grinding cavity 101, so that the air inlet pipe 105 can be conveniently connected to the gas source; and / or the grinding machine further comprises an air outlet pipe 107, the inside of the air outlet pipe 107 has an air outlet channel, one end of the air outlet pipe 107 is connected to the main body 100 at the air outlet 106, and the air outlet channel is communicated with the grinding cavity 101, so that the air outlet pipe 107 can be conveniently connected to the collecting device, thereby facilitating the collection and treatment of the exhaust gas in the grinding cavity 101.

[0049] Referring to Figure 1 , Figure 3 and Figure 4In the grinder of the above embodiments, the main body 100 can include a bearing platform 108, an annular tube 109 connected to the bearing platform 108, and a connecting tube 110, the inside of the annular tube 109 is hollow to form a grinding cavity 101, the inside of the connecting tube 110 is hollow to form an inlet channel 102, one end of the connecting tube 110 is connected to the annular tube 109, and the other end forms a feeding port 103, so that the material to be ground can enter the grinding cavity 101 inside the annular tube 109 through the feeding port 103. The annular tube 109 and the connecting tube 110 in a tubular structure form the grinding cavity 101 and the inlet channel 102, the overall structure is simple and easy to implement, and the material is rubbed with each other by the action of the sound wave to achieve grinding, the annular tube 109 and the connecting tube 110 in the main body 100 do not need to rotate, which reduces the difficulty of fixing the main body 100, avoids the problem of dislocation caused by large centrifugal force, and is suitable for small material grinding.

[0050] In some embodiments, the reference Figure 1 and Figure 3 The sound wave generator 200 blocks the feeding port 103 and is detachably connected to the connecting tube 110, and the opening and closing of the feeding port 103 can be realized by disassembling the sound wave generator 200. Specifically, in some embodiments of the grinder, the connecting tube 110 is provided with a first threaded part 113 at one end of the feeding port 103, and the sound wave generator 200 is provided with a second threaded part 201 capable of being matched and connected with the first threaded part 113, and the sound wave generator 200 and the connecting tube 110 are detachably connected through the first threaded part 113 and the second threaded part 201. The connecting tube 110 and the sound wave generator 200 can also be detachably connected through a bayonet connection or a lock catch connection.

[0051] In some embodiments, the reference Figure 1 and Figure 3 The bearing platform 108 includes a base 111 and a plurality of support members 112, the support members 112 are connected to the bottom of the annular tube 109, and the plurality of support members 112 are respectively supported at different parts of the annular tube 109, thereby improving the stability of supporting the annular tube 109, wherein the side of the support member 112 facing the annular tube 109 can be provided with an arc-shaped groove 114, the arc-shaped groove 114 is matched with the outer wall of the annular tube 109, so that a part of the annular tube 109 can be placed in the arc-shaped groove 114 and can be radially limited by the arc-shaped groove 114, thereby improving the stability of the connection between the annular tube 109 and the bearing platform 108.

[0052] In some other embodiments, the main body can also adopt a non-tubular structure to form the grinding cavity, for example, the main body can adopt a solid block of material, the interior of the main body is made into an annular cavity to form the grinding cavity, and the inlet channel is also arranged in the interior of the main body and penetrates through the outer wall of the main body to form the feeding port. The interior of the main body can also be provided with an air inlet channel, an air inlet port, an air outlet channel and an air outlet port. Specifically, the interior of the main body is provided with an air inlet channel, one end of the air inlet channel is communicated with the grinding cavity, and the other end penetrates through the outer wall of the main body to form an air inlet port, which is adapted to connect to an air source to introduce air into the grinding cavity; and / or, the interior of the main body is provided with an air outlet channel, one end of the air outlet channel is communicated with the grinding cavity, and the other end penetrates through the outer wall of the main body to form an air outlet port, which is used to discharge the air in the grinding cavity.

[0053] Figures 6 to 14 The schematic diagrams of the vibration modes of the annular tube 109 resonating at multiple frequencies are shown by the Comsol finite element simulation, wherein the numerical value (Hz) of "characteristic frequency" in the upper left corner of each schematic diagram represents the current simulation input acoustic wave frequency, the scale readings shown along the vertical direction on the right side represent the surface sound pressure level (dB), and the color and shade shown on the annular tube 109 and the connecting tube 110 model can correspond to the corresponding surface sound pressure level obtained from the scale readings, thereby simulating the vibration modes at different acoustic wave frequencies. Figures 6 to 14 In turn, the resonating conditions at the acoustic wave frequencies of 204.01 Hz, 223.08 Hz, 409.88 Hz, 444.98 Hz, 615.35 Hz, 664.42 Hz, 810.62 Hz, 880.39 Hz and 982.35 Hz, so it can be known that the resonating conditions (such as the position, intensity and mode of resonance) change with the change of the input acoustic wave frequency. Therefore, when applied to small material grinding, the aggregation and dispersion of the material change with the change of the resonating conditions, thereby producing mutual friction to achieve grinding. The specific frequencies used in the above simulation examples are only used as a reference for the simulation state, and in actual application, the acoustic wave frequencies resonating in the space of the device can be simulated according to the specific structure actually adopted by the grinding machine.

[0054] As can be known from the above embodiments, unlike the traditional ball milling method, the grinding machine of the embodiments of the present application realizes the grinding of the material by inputting a variable frequency acoustic wave in the annular grinding cavity 101, forming a new grinding method, which is suitable for small-sized fine powders, for example, can be used for the preparation of 3D printing powder materials, can realize the sufficient grinding of the material and avoid the large-scale rotation or vibration of the device, thereby overcoming the shortcomings of the traditional ball milling method after miniaturization.

[0055] Reference Figures 1 to 4 The second aspect of the present application provides a grinding method, comprising:

[0056] The grinding machine of the above-mentioned first aspect embodiment is configured.

[0057] The material to be ground is added into the grinding cavity 101, and the sound wave generator 200 is installed at the feeding port 103;

[0058] The sound wave generator 200 inputs the variable frequency sound wave into the grinding cavity 101 through the inlet channel 102 to cause the resonance change in the grinding cavity 101, and the material to be ground is rubbed mutually with the resonance change.

[0059] Thus, under the action of the variable frequency sound wave, the sound wave resonates in the annular grinding cavity 101, the material to be ground is gathered at the position where the resonance occurs and dispersed at the position where the resonance does not occur under the action of the sound wave, and the resonance formed by the sound wave changes with the change of the sound wave frequency, for example, the position, intensity and mode of the resonance change with the change of the sound wave frequency, thereby the material to be ground is gathered and dispersed to be rubbed mutually, and the grinding of the material is realized.

[0060] In the above grinding method, before the sound wave generator 200 inputs the variable frequency sound wave into the grinding cavity 101, and during the grinding process of inputting the variable frequency sound wave into the grinding cavity 101, the inert gas such as high-purity argon, helium and the like is input into the grinding cavity 101 as the protective gas for isolation protection during the ball milling, so as to isolate the oxygen during the grinding process and avoid the problem of powder explosion caused by the heating of the ball milling.

[0061] The grinding machine and the grinding method thereof are suitable for small material grinding, the material is rubbed mutually by the action of the sound wave, the main body 100 does not need to rotate, the fixing difficulty of the main body 100 is reduced, and the problem of dislocation caused by the large centrifugal force is avoided.

[0062] The embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge range of the ordinary skill in the art without departing from the purpose of the present application. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

Claims

1. A grinding machine, characterized in that, include: The main body has a grinding chamber and an inlet channel inside. The grinding chamber is annular and is used to hold the material to be ground. One end of the inlet channel is connected to the grinding chamber, and the other end forms a feed port. A sound wave generator is disposed at the feed inlet and detachably connected to the main body, so that the feed inlet can be opened and closed by assembling and disassembling the sound wave generator. The sound wave generator is used to input variable frequency sound waves into the grinding chamber.

2. The grinding machine according to claim 1, characterized in that, The inlet channel is straight and tangent to the grinding chamber.

3. The grinding machine according to claim 1, characterized in that, The inner diameter of the inlet channel is equal to the inner diameter of the grinding chamber.

4. The grinding machine according to claim 1, characterized in that, The main body is also provided with an air inlet and an air outlet, which are respectively connected to different positions of the grinding chamber. The air inlet is adapted to connect to an air source to introduce gas into the grinding chamber, and the air outlet is used to discharge the gas in the grinding chamber.

5. The grinding machine according to claim 4, characterized in that, The grinding machine also includes an air inlet pipe, which has an air inlet channel inside. One end of the air inlet pipe is connected to the main body at the air inlet, and the air inlet channel is connected to the grinding chamber. And / or, the grinding machine further includes an air outlet pipe, the air outlet pipe having an air outlet channel inside, one end of the air outlet pipe being connected to the main body at the air outlet, and the air outlet channel being connected to the grinding chamber.

6. The grinding machine according to any one of claims 1 to 5, characterized in that, The main body includes a support platform, an annular tube, and a connecting tube. The annular tube is connected to the support platform. The annular tube is hollow inside to form the grinding chamber. The connecting tube is hollow inside to form the inlet channel. One end of the connecting tube is connected to the annular tube, and the other end forms the feed port. The acoustic wave generator blocks the feed port and is detachably connected to the connecting tube.

7. The grinding machine according to claim 6, characterized in that, The connecting pipe has a first threaded portion at one end of the feed inlet, and the acoustic generator has a second threaded portion that can be matched and connected with the first threaded portion. The acoustic generator and the connecting pipe are detachably connected through the first threaded portion and the second threaded portion.

8. The grinding machine according to claim 6, characterized in that, The support platform includes a base and multiple support members. The support members are connected to the bottom of the annular tube, and the multiple support members support different parts of the annular tube respectively.

9. A grinding method, characterized in that, include: Configure a grinding mill as described in any one of claims 1 to 8; The material to be ground is added into the grinding chamber, and the sound wave generator is installed at the feed inlet; Through the inlet channel, the sound wave generator inputs a variable frequency sound wave into the grinding chamber to create a resonance that changes within the grinding chamber. The material to be ground rubs against each other as the resonance changes.

10. The grinding method according to claim 9, characterized in that, An inert gas is introduced into the grinding chamber.

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