A method of aerodynamic milling of microwave ferrite detection spheres

Abstract

The application discloses a kind of microwave ferrite detection ball pneumatic grinding ball method, only with airflow as power to push detection ball in the cavity of the container with rough inner wall surface high-speed collision rolling in cavity inner wall, so that detection ball is ground round and small to reach detection qualified standard.The container with rough inner wall surface is made of a kind of open upward tank body with grinding wheel material, and the tank cover that can ventilate is covered on the pouring opening of the tank body, and the space in the tank body is formed into tank cavity by tank cover cover combination.At least the transparent region is set to the part region of tank cover, and its advantage lies in: using airflow to push the mode of grinding ball, the setting of whole mechanical driving mechanism is avoided, and the manufacturing cost of equipment is significantly reduced;Tank body is driven by airflow, can make tank wall axial uniform receive airflow scouring force, can avoid local tank wall wear, greatly prolong service life;Grinding ball efficiency can be significantly improved, and grinding ball efficiency is higher and higher with the extension of use time.

Description

TECHNICAL FIELD

[0001] The application relates to a kind of microwave ferrite detection ball pneumatic ball mill methods, belong to ball mill technical field. BACKGROUND

[0002] Microwave ferrite is also called gyromagnetic ferrite, which means that when the plane polarized microwave propagates in a certain direction, the polarization plane always rotates around the propagation direction, and it has a wide application in electronic components.

[0003] Microwave ferrite material is formed by mixing and sintering of various formulations, and the produced microwave ferrite material needs to be detected for performance, including ferromagnetic resonance line width, saturation magnetization, Curie temperature and spin wave line width.

[0004] The detection equipment has strict particle size requirements for detecting microwave ferrite, generally in the range of 0.5-3mm, and the formed microwave ferrite material needs to be knocked into small pieces before detection, and then finely ground into small balls by ball mill equipment.

[0005] There are many ball milling methods for ball milling, but most of them cannot be separated from the rotation or stirring mode driven by the driving mechanism, and the overall cost is generally high. Since the detection method is to detect a small amount of sample from a batch of products, the amount of ball milling required by the general factory is not very large, and the frequency is not very high, and it is hoped to have a low-cost ball milling equipment with simple and convenient installation, use and maintenance. Therefore, the applicant has carried out repeated research and experiment, and also carried out relevant search.

[0006] Through the search, the patent document with the application number 202011639924.8 and the invention name of a vertical continuous stirring ball mill equipment and its working method is obtained, which discloses a vertical continuous stirring ball mill equipment, including a cylinder, a plurality of grinding balls, a cylinder cover, a stirrer and an air inlet and outlet control system; the cylinder is vertically arranged; a plurality of grinding balls are arranged in the cylinder; the cylinder cover is sealed on the top opening of the cylinder; the stirrer penetrates the cylinder cover and extends into the cylinder, and can rotate; the material put into the cylinder is ground by the grinding balls under the rotation of the stirrer; the air inlet and outlet control system includes an air inlet channel and an air outlet; one end of the air inlet channel is opened on the bottom surface of the cylinder and communicates with the inside of the cylinder, and the other end communicates with a pressurized gas tank or a gas pump outside the cylinder; the air outlet is opened on the cylinder cover; the air inlet and outlet control system further includes a spherical crown type cover plate, which is arranged in the cylinder and covers the port of the air inlet channel, and is connected to the bottom surface of the cylinder through an elastic element; the cylinder cover is provided with a feeding port penetrating the inside and outside of the cylinder. The invention has the advantages of continuous processing, accurate product particle size control, high efficiency and energy saving.

[0007] Although the document considers that the invention has the above advantages, the technical scheme provided by the document still uses a motor drive and a stirring mechanism while using a high-pressure gas supply device, so that the device still has a complex structure and a high cost. SUMMARY

[0008] The technical problem to be solved by the present application is to provide a grinding ball method which has a simple device, is simple and convenient to install, use and maintain, and has a low production and application cost.

[0009] To solve the above problems, the technical scheme provided by the present application is as follows:

[0010] A kind of microwave ferrite detection ball pneumatic grinding ball method is used to drive the detection ball to collide and roll at high speed in the inner wall rough container cavity by air flow, so that the detection ball is ground to the detection qualified standard.

[0011] Preferably, the inner wall rough container is an upward opening tank body made of a grinding wheel material, and a breathable tank cover is covered on the pouring opening of the tank body to form a tank cavity by covering the tank cover.

[0012] Preferably, at least part of the tank cover is set as a transparent area.

[0013] Preferably, a gas pipe hole is formed on the side wall of the tank body, the gas pipe hole penetrates the inner wall from the outer wall in the tangent direction of the inner wall of the tank cavity, one end of a gas pipe connected with a high-pressure gas source is inserted into the gas pipe hole as a gas jet nozzle, the gas jet nozzle sprays air flow into the tank cavity in the tangent direction of the inner wall of the tank cavity, and a cyclone is formed in the tank cavity.

[0014] Preferably, the tank body can rotate around its own axis, the gas jet nozzle is installed in the tank cavity, and the tangential force formed by the gas jet nozzle spraying flow to the inner wall of the tank cavity makes the tank body rotate, so that the spray points are uniformly landed on an annular inner wall surface.

[0015] Preferably, the spray points are landed on an annular inner wall surface, so that the annular inner wall surface gradually forms an annular grinding ball groove, and the detection balls falling into the grinding ball groove have more points to obtain friction.

[0016] Preferably, a vertical suspension shaft is installed in a vertical suspension manner and is limited to rotate in the circumferential direction, a bearing is installed on the vertical suspension shaft, a bearing hole is formed on the tank cover, the tank body is installed on the vertical suspension shaft in a suspended manner through the bearing hole formed on the tank cover and the bearing on the vertical suspension shaft, the lower section of the vertical suspension shaft is inserted into the tank cavity, hollow jet pipes one and two are respectively arranged on the two sides of the vertical suspension shaft, gas jet nozzles facing opposite directions are respectively installed on the two ends of the jet pipes one and two, an air pipe is arranged along the axis of the vertical suspension shaft, and the gas pipe is connected with the air pipe.

[0017] Preferably, the first nozzle and the second nozzle have a height difference.

[0018] Preferably, a friction deceleration mechanism for slowing down the rotation of the tank body is arranged between the suspension shaft and the tank cover, comprising: a lower wear-resistant friction plate is arranged on the tank cover and sleeved on the outside of the suspension shaft, an upper wear-resistant friction plate is arranged above the lower wear-resistant friction plate and is sleeved on the outside of the suspension shaft and is limited in circumferential rotation, and the upper wear-resistant friction plate is pressed against the lower wear-resistant friction plate and applies corresponding pressure to regulate the rotation speed of the tank body.

[0019] Preferably, the suspension shaft installed in a suspension manner is installed on the cross beam, and a lifting mechanism of the suspension shaft is arranged between the suspension shaft and the cross beam to enable the tank body to close and open the tank cover after being placed, comprising: a movable base table is arranged below the tank body, and there is a gap between the tank body and the base table under working conditions; an axial hole is arranged on the cross beam and communicates with the upper and lower portions, an upper segment of the suspension shaft is sleeved in the axial hole and can move up and down in the axial hole, and a key groove and a key are arranged between the suspension shaft and the axial hole to limit the rotation of the suspension shaft; the upper segment of the suspension shaft extends out of the cross beam and is provided with a pressing plate at the end portion, and a supporting spring is sleeved on the outside of the suspension shaft between the pressing plate and the cross beam.

[0020] Preferably, a sleeve box capable of sleeving the tank body is arranged, the side wall of the sleeve box is flush with the upper end of the side wall of the tank body, and the tank cover closed on the tank body is connected with the sleeve box through buckling. Beneficial effects

[0021] 1. The airflow propelling mode is adopted for the grinding ball, the whole mechanical driving mechanism is omitted, and the manufacturing cost of the equipment is significantly reduced.

[0022] 2. The airflow is used to drive the rotation of the tank body, the airflow can uniformly wash the tank wall in the axial direction, the local grinding of the tank wall can be avoided, and the service life is greatly prolonged.

[0023] 3. The jet flow points continuously land on an annular inner wall surface, the annular inner wall surface gradually forms a grinding ball groove, the grinding ball efficiency is significantly improved, and the grinding ball device is more efficient with use.

[0024] 4. Visual operation, which is convenient for mastering the processing progress.

[0025] 5. Simple operation. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 A perspective view of the grinding ball device used for the method described in Embodiment 1, wherein the tank cover of the tank body is not shown;

[0027] Figure 2 A perspective view of the grinding ball device used for the method described in Embodiment 1, wherein the jet nozzle of the air pipe is not shown;

[0028] Figure 3A cross-sectional view of the ball mill device used in the method described in Example 2;

[0029] Figure 4 A horizontal cross-sectional view of the ball mill device used in the method described in Example 2;

[0030] Figure 5 A partial enlarged view of Figure 3 ;

[0031] Figure 6 A cross-sectional view of the ball mill device used in the method described in Example 3;

[0032] Figure 7 A cross-sectional view of the lifting mechanism of the ball mill device used in the method described in Example 4;

[0033] Figure 8 A partial cross-sectional view of the ball mill device used in the method described in Example 5.

[0034] In the figure: 1, tank body; 101, tank cavity; 1011, air pipe hole; 1012, ball mill groove; 2, tank cover; 201, glass; 202, exhaust hole; 203, buckle; 3, air pipe; 301, air jet nozzle; 4, hanging shaft; 401, air pipe line; 5, bearing; 6, jet pipe one; 7, jet pipe two; 8, cross beam; 801, shaft hole; 9, upper wear-resistant friction plate; 10, lower wear-resistant friction plate; 11, spring; 12, pressure adjusting sleeve; 13, bottom platform; 14, keyway; 15, key; 16, pressing plate; 17, supporting spring; 18, sleeve box. DETAILED DESCRIPTION

[0035] The application will be further described below in conjunction with the embodiments and the accompanying drawings: Example 1

[0036] As shown in Figure 1 , 2 , a kind of microwave ferrite detection ball pneumatic ball mill method is that only air flow is used as power to push detection ball to high-speed collision and roll in the cavity of the container with rough inner wall surface, so that the detection ball is ground to the detection qualified standard. In this way, the motor drive mechanism, transmission mechanism and rack required by the traditional ball mill method are not needed, and the required air flow is provided by high-pressure gas source, and the high-pressure gas source is provided by air pressure pump, and the air pressure pump is a general factory setting, without additional purchase. Therefore, the equipment structure required by the ball mill according to this method is simple, the cost is low, and the use effect is good.

[0037] The above-mentioned container with rough inner wall surface is an upward open tank body 1 made of white corundum and other grinding wheel materials, and a breathable tank cover 2 is covered on the pouring opening of the tank body 1, that is, a small-diameter exhaust hole 202 is formed on the tank cover 2, and the space in the tank body 1 is formed into a tank cavity 101 by the tank cover 2.

[0038] To facilitate observation of the grinding balls inside the can cavity 101, at least a portion of the can lid 2 is set as a transparent area, which is generally made of glass 201.

[0039] An air pipe hole 1011 is opened on the side wall of the tank body 1, so that the air pipe hole 1011 penetrates the inner wall from the outer wall in the tangential direction of the inner wall of the tank cavity 101. The other end of the air pipe 3, which is connected to the high-pressure air source at one end, is inserted into the air pipe hole 1011 as a jet nozzle 301. The jet nozzle 301 sprays air into the tank cavity in the tangential direction of the inner wall of the tank cavity 101, forming an air vortex in the tank cavity 101, thereby pushing the detection ball to collide and roll at high speed on the inner wall of the cavity. Example 2

[0040] like Figure 3 As shown in Figure 5, the difference between this method and Embodiment 1 is that the tank body 1 can rotate around its own axis. The nozzle 301 is installed inside the tank cavity 101. The tangential force generated by the nozzle 301 spraying water tangentially onto the inner wall of the tank cavity 101 causes the tank body 1 to rotate, so that the spray point is evenly distributed on an annular surface of the inner wall. If the tank body does not rotate, the spray will only fall on one point, forming an airflow scouring groove at that point in a short time until the tank wall at that point is worn through, greatly shortening the service life of the tank body 1. However, by using this method, the service life of the tank body 1 can be extended by more than ten times.

[0041] The specific method to achieve the above objective is as follows: A suspended shaft 4, which is restricted from circumferential rotation, is installed in a suspended manner. A bearing 5 is installed on the suspended shaft 4. A bearing hole is opened on the tank cover 2. The tank body 1 is suspended on the suspended shaft 4 through the bearing hole opened on the tank cover 2 and the bearing 5 on the suspended shaft 4. The lower section of the suspended shaft 4 extends into the tank cavity 101. Hollow nozzles 6 and 7 are respectively set on both sides of the suspended shaft 4. Air nozzles 301 facing opposite directions are installed at both ends of nozzles 6 and 7. A ventilation pipe 401 is set along the axis of the suspended shaft 4 and the air pipe 3 is connected to the ventilation pipe 401.

[0042] Furthermore, a friction deceleration mechanism for slowing down the rotational speed of the tank body 1 is provided between the suspension shaft 4 and the tank cover 2. This mechanism includes: a lower wear-resistant friction plate 10 fitted onto the tank cover 2 and sleeved outside the suspension shaft 4; and an upper wear-resistant friction plate 9, fitted above the lower wear-resistant friction plate 10 and restricted from circumferential rotation, fitted onto the suspension shaft 4. The upper wear-resistant friction plate 9 presses against the lower wear-resistant friction plate 10 and applies corresponding pressure to regulate the rotational speed of the tank body 1. Specifically, a spring 11 is provided on the upper wear-resistant friction plate 9, and a pressure adjusting sleeve 12 threadedly engaged with the suspension shaft 4 is provided on the spring 11. Screwing the pressure adjusting sleeve 12 upwards or downwards increases or decreases the pressure exerted by the upper wear-resistant friction plate 9 on the lower wear-resistant friction plate 10. In this embodiment, the purpose of rotating the tank body 1 is merely to prevent the jetting point from always concentrating in one place, not to improve the grinding efficiency. On the contrary, since the direction in which the detection ball is blown is consistent with the direction of tank body rotation, if the rotational speed of the tank body 1 is too high, the relative velocity between the detection ball and the inner wall of the tank cavity 101 will decrease, which is detrimental to grinding. By using the above method, the rotation speed of tank 1 can be reduced, thereby increasing the relative speed between the detection ball and the tank wall of tank 1. Example 3

[0043] like Figure 6 As shown, the difference from Embodiment 2 is that the jet point lands on an annular inner wall surface, gradually forming an annular grinding ball groove 1012 on this inner wall surface. This allows the detection ball falling into the grinding ball groove 1012 to have more points of contact with the surface for friction, thereby greatly improving the grinding ball efficiency. In other words, using this method, a new tank 1 will have a higher grinding ball efficiency over time, until finally the tank wall is worn through and the tank is scrapped.

[0044] Furthermore, a height difference is created between nozzle 6 and nozzle 7. This gradually forms two annular grinding grooves 1012, which not only extends the service life of the tank 1 but also increases the chance of the grinding detection ball entering the grinding groove 1012, thereby further improving the grinding efficiency. Example 4

[0045] like Figure 7 As shown, further, the suspension shaft 4, which is installed in a suspended manner, is mounted on the crossbeam 8. A lifting mechanism for the suspension shaft 4 is provided between the suspension shaft 4 and the crossbeam 8, so that the tank body 1 can close and open the tank cover 2 after being lowered. This includes: a movable base platform 13 is provided below the tank body 1, so that there is a gap between the tank body 1 and the base platform 13 under working conditions; a shaft hole 801 is provided on the crossbeam 8, which is vertically connected, and the upper section of the suspension shaft 4 is fitted into the shaft hole 801 and can move up and down in the shaft hole 801; a keyway 14 and a key 15 are provided between the suspension shaft 4 and the shaft hole 801 to restrict the rotation of the suspension shaft 4; the upper section of the suspension shaft 4 extends out of the crossbeam 8 and a pressure plate 16 is provided at the end; a support spring 17 is fitted on the outside of the suspension shaft 4 between the pressure plate 16 and the crossbeam 8.

[0046] In use, gently pressing your hand on the lid 2 will lower the can 1 onto the base 13, making it easy to close and open the lid 2. Releasing your hand from the lid 2 will allow the can 1, with the lid closed, to rise back off the base 13 under the action of the support spring 17. Moving the base 13 away will allow you to remove the can 1 with the lid 2 open. Example 5

[0047] like Figure 8 As shown, the difference from the above embodiment is that a sleeve 18 is provided to fit the can 1, with the side wall of the sleeve 18 flush with the upper end of the side wall of the can 1, and the can lid 2, which is closed on the can 1, is connected to the sleeve 18 by a snap fastener 203. In this way, when the can 1 is scrapped, it can be directly replaced without the need for processing the can 1 to fit the can lid 2.

[0048] The above embodiments are only used to describe the present invention more clearly, and should not be regarded as limiting the scope of protection covered by the present invention. Any equivalent modifications should be regarded as falling within the scope of protection covered by the present invention.

Claims

1. A method for pneumatically grinding microwave ferrite testing balls, characterized in that: The test ball is driven by airflow to collide and roll at high speed on the inner wall of the container with a rough inner wall surface, so that the test ball is ground to a small size to meet the test qualification standard. The container with a rough inner wall surface is a can (1) with an upward opening made of grinding wheel material. A can lid (2) that can be vented is placed on the filling port of the can (1). The space inside the can (1) is covered by the can lid (2) to form a can cavity (101). The can (1) can be rotated around its own axis. The air nozzle (301) is installed in the can cavity (101). The tangential force formed by the air nozzle (301) spraying the air into the inner wall of the can cavity (101) in a tangential direction causes the can (1) to rotate, so that the spray point falls evenly on a ring-shaped inner wall surface.

2. The method for pneumatic grinding of microwave ferrite testing balls according to claim 1, characterized in that: At least a portion of the can lid (2) should be set to a transparent area.

3. The method for pneumatic grinding of microwave ferrite testing balls according to claim 1 or 2, characterized in that: An air pipe hole (1011) is opened on the side wall of the tank (1), so that the air pipe hole (1011) penetrates the inner wall from the outer wall in the tangential direction of the inner wall of the tank cavity (101). The other end of the air pipe (3), which is connected to the high-pressure air source at one end, is inserted into the air pipe hole (1011) as a jet nozzle (301). Airflow is jetted into the tank cavity from the jet end in the tangential direction of the inner wall of the tank cavity (101), forming an air vortex in the tank cavity (101).

4. The method for pneumatic grinding of microwave ferrite testing balls according to claim 1, characterized in that: By utilizing the jet point landing on an annular surface of the inner wall, the annular inner wall surface gradually forms an annular grinding ball groove (1012), thereby allowing the detection ball falling into the grinding ball groove (1012) to obtain more points and surfaces for friction.

5. The method for pneumatic grinding of microwave ferrite testing balls according to claim 1, characterized in that: A suspended shaft (4) with restricted circumferential rotation is installed in a suspended manner. A bearing (5) is installed on the suspended shaft (4). A bearing hole is opened on the tank cover (2). The tank body (1) is suspended on the suspended shaft (4) through the bearing hole opened on the tank cover (2) and the bearing (5) on the suspended shaft (4). The lower section of the suspended shaft (4) extends into the tank cavity (101). Hollow nozzles one (6) and two (7) are respectively set on both sides of the suspended shaft (4). Air nozzles (301) facing opposite directions are installed at both ends of nozzles one (6) and nozzle two (7). A ventilation pipe (401) is set along the axis of the suspended shaft (4) and the air pipe (3) is connected to the ventilation pipe (401).

6. The method for pneumatic grinding of microwave ferrite testing balls according to claim 5, characterized in that: This creates a height difference between nozzle one (6) and nozzle two (7).

7. The method for pneumatic grinding of microwave ferrite testing balls according to claim 5, characterized in that: A friction deceleration mechanism for slowing down the rotation speed of the tank body (1) is provided between the suspension shaft (4) and the tank cover (2), including: a lower wear-resistant friction plate (10) fitted on the tank cover (2) and sleeved outside the suspension shaft (4), and an upper wear-resistant friction plate (9) fitted on the suspension shaft (4) and restricted from circumferential rotation is provided above the lower wear-resistant friction plate (10), and the upper wear-resistant friction plate (9) presses against the lower wear-resistant friction plate (10) and applies corresponding pressure to regulate the rotation speed of the tank body (1).

8. The method for pneumatic grinding of microwave ferrite testing balls according to claim 5, characterized in that: The suspension shaft (4) installed in a suspended manner is mounted on the crossbeam (8). A lifting mechanism for the suspension shaft (4) is set between the suspension shaft (4) and the crossbeam (8) so that the tank (1) can be closed and opened after being lowered. This includes: a movable base platform (13) is set below the tank (1) so that there is a gap between the tank (1) and the base platform (13) under working conditions; a shaft hole (801) with vertical and horizontal communication is set on the crossbeam (8), the upper section of the suspension shaft (4) is fitted in the shaft hole (801) and can move up and down in the shaft hole (801), and a keyway (14) and a key (15) are set between the suspension shaft (4) and the shaft hole (801) to restrict the rotation of the suspension shaft (4); the upper section of the suspension shaft (4) extends out of the crossbeam (8) and a pressure plate (16) is set at the end, and a support spring (17) is fitted on the outside of the suspension shaft (4) between the pressure plate (16) and the crossbeam (8).

9. The method for pneumatic grinding of microwave ferrite testing balls according to claim 5, characterized in that: Set up a box (18) that can fit the can (1), so that the side wall of the box (18) is flush with the upper end of the side wall of the can (1), and the can lid (2) that is closed on the can (1) is connected to the box (18) by a buckle (203).

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