A ball mill

Abstract

The present application relates to a kind of ball mill, comprising: driven rotation lower grinding disc, the upper surface of the lower grinding disc is equipped with spiral groove for placing ball, the spiral groove has the inlet in the center and the outlet at the edge;Driven lifting upper grinding disc, set in the upper of the lower grinding disc, for the ball on the spiral groove is applied pressure;Circulation channel, inside the lower grinding disc is equipped, the circulation channel is communicated the inlet and the outlet;Wherein, the upper grinding disc is opened with the center area of the inlet corresponding avoiding hole, the spiral groove includes the guide section corresponding the avoiding hole and the working section corresponding the upper grinding disc.Ball is polished by the ball mill, in the whole processing, the moving track of all balls, processing times, grinding time is close to complete coincidence, so that smaller ball batch diameter variation can be obtained, eliminate or reduce the original existence screening or again processing.

Description

Technical Field

[0001] The invention relates to the technical field of sphere grinding and polishing, in particular to a ball grinding machine. Background Art

[0002] Precision spheres are essential components of high-end machinery and equipment, including high-performance bearings, high-precision ball screws, and high-precision linear guides. Their machining quality is directly related to the overall performance of these high-performance equipment. Because precision spheres are typically used in groups within high-performance bearings and high-precision ball screws, even if the accuracy of a single sphere (ball diameter variation, spherical error, and surface roughness) is high, large variations in batch diameter (large differences in the diameters of spheres processed within the same batch) will still affect the overall accuracy and lifespan of the equipment.

[0003] Ball grinding is the final superfinishing step in ball processing. Existing ball grinding machines suffer from large variations in ball batch diameter, requiring additional screening or reprocessing before the finished balls can be used. The root cause is inconsistent grinding speeds and pressures at different locations on the grinding disc. Furthermore, the timing and frequency of balls entering the grinding disc for processing are random and uncontrollable, resulting in uneven grinding results and, ultimately, large variations in ball batch diameter. Summary of the Invention

[0004] The object of the present invention is to provide a new ball grinding machine to solve the problem of large variation in ball batch diameter in existing ball grinding machines, thereby eliminating or reducing the existing screening or reprocessing.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A ball grinding machine, comprising:

[0007] A lower grinding disc driven to rotate, wherein the upper surface of the lower grinding disc is provided with a spiral groove for accommodating the spheres, and the spiral groove has an inlet located in the center and an outlet located at the edge;

[0008] An upper grinding disc driven to rise and fall, disposed above the lower grinding disc, for applying pressure to the balls on the spiral grooves;

[0009] A circulation channel is provided inside the lower grinding disc, wherein the circulation channel is connected to the feed inlet and the discharge outlet;

[0010] Wherein, a avoidance hole is opened in the central area of ​​the upper grinding disc corresponding to the feed port, and the spiral groove includes a guiding section corresponding to the avoidance hole and a working section corresponding to the upper grinding disc.

[0011] Preferably, the circumferential cross-section of the spiral groove is V-shaped.

[0012] Preferably, the pitch of the guiding section is greater than the pitch of the working section.

[0013] Preferably, a heightening plate is fixed to the central area of ​​the lower grinding disc, and a guide groove matching the guide section is provided on the heightening plate at a position corresponding to the guide section.

[0014] Preferably, the circulation channel is U-shaped.

[0015] Preferably, an avoidance groove is provided at the bottom of the lower grinding disc, a U-shaped conduit is provided in the avoidance groove, and the U-shaped conduit has the circulation channel.

[0016] Preferably, the ball grinding machine also includes a pressure component for driving the upper grinding disc to rise and fall, and the pressure component includes two driving cylinders symmetrically arranged along the center line of the upper grinding disc, and the piston rods of the two driving cylinders are fixed to the upper grinding disc through a connecting piece.

[0017] Preferably, two sliding rods are symmetrically arranged along the center line of the upper grinding disc, the connecting member is slidably connected to the two sliding rods, and a force sensor is provided between the connecting member and the piston rod of the driving cylinder.

[0018] Preferably, the avoidance hole is through-through from top to bottom, and a through hole is formed in the central area of ​​the connecting piece corresponding to the avoidance hole.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] Before grinding, the spiral groove and the circulation channel are filled with the balls to be processed. During grinding, the lower grinding disc is driven to rotate, and the upper grinding disc is driven to descend to apply pressure to the balls on the spiral groove. Under the joint action of the lower grinding disc and the upper grinding disc, the balls perform a processing motion (rotation + revolution) with a continuously changing rotation angle from the inside to the outside along the spiral groove. With the continuous change of the rotation angle, the processing trajectory is uniformly and fully envelops the surface of the sphere, thereby obtaining better single sphere accuracy; wherein, an avoidance hole is opened in the central area of ​​the upper grinding disc corresponding to the feed inlet, so that there is no resistance above the feed inlet. Under the mutual squeezing of the balls, when the balls move to the discharge port at the outermost edge of the spiral groove, they will enter the circulation channel downward, and then flow out from the feed inlet at the center, thereby entering the spiral groove again. Under the action of centrifugation, the balls enter the working section from the guide section, realizing the circulation processing of the balls. During the entire processing, the movement trajectory, processing times and grinding time of all balls are almost completely consistent, so that a smaller variation in ball batch diameter can be obtained, eliminating or reducing the original screening or reprocessing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] The structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not intended to limit the conditions under which the present invention can be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportional relationships, or adjustments in size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and objectives that can be achieved by the present invention.

[0023] Figure 1 This is a schematic structural diagram of the ball grinding machine in this embodiment;

[0024] Figure 2 1 is a top view of the lower grinding disc in this embodiment;

[0025] Figure 3 is a cross-sectional view of the lower grinding disc in this embodiment;

[0026] Figure 4 Schematic diagram of the structure of the height-increasing plate in this embodiment;

[0027] Figure 5 A schematic structural diagram of a lower grinding disc in another embodiment;

[0028] Figure 6 is a schematic diagram of the three-dimensional structure of the lower grinding disc in another embodiment;

[0029] Figure 7 is a schematic cross-sectional structural diagram of a lower grinding disc in another embodiment;

[0030] Figure 8 In another embodiment Figure 7 Schematic diagram of the local enlarged structure.

[0031] Description of reference numerals:

[0032] 10. Lower grinding disc; 11. Spiral groove; 111. Feeding port; 112. Discharging port; 11a. Guide section; 11b. Working section; 12. Circulation channel; 13. U-shaped guide tube; 14. Heightening plate; 141. Guide groove;

[0033] 20. Upper grinding disc; 21. Avoidance hole;

[0034] 30. Pressurizing assembly; 31. Driving cylinder; 32. Connecting piece; 321. Through hole; 33. Sliding rod; 34. Force sensor;

[0035] 60. Support mechanism; 601. Rotating tray; 602. Fixed base; 603. Bearing plate; 604. Driving member;

[0036] 70. Dust removal mechanism; 71. Dust removal parts; 711. Dust removal cylinder; 712. Splicing tube; 713. Dust removal chamber; 714. Discharge port; 72. Anti-blocking part; 721. Unblocking rod; 722. Unblocking block; 723. Cylinder; 73. Negative pressure flow channel; 74. Connecting rod. DETAILED DESCRIPTION

[0037] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally located component.

[0039] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0040] Reference Figures 1 to 3 The ball grinding machine disclosed in this embodiment includes:

[0041] A lower grinding disc 10 is driven to rotate, and a spiral groove 11 is provided on the upper surface of the lower grinding disc 10 for accommodating the spheres. The spiral groove 11 has an inlet 111 located at the center (with the rotation axis of the lower grinding disc 10 as a reference) and an outlet 112 located at the edge.

[0042] The upper grinding disc 20 is driven to rise and fall, and is arranged above the lower grinding disc 10, for applying pressure to the balls on the spiral groove 11;

[0043] The circulation channel 12 is provided inside the lower grinding disc 10 and is connected to the feed port 111 and the discharge port 112;

[0044] Among them, the upper grinding disc 20 is provided with an avoidance hole 21 in the central area corresponding to the feed port 111, and the spiral groove 11 includes a guide section 11a (non-spherical processing area) corresponding to the avoidance hole 21 and a working section 11b (spherical processing area) corresponding to the upper grinding disc 20.

[0045] Before grinding, the spiral groove 11 and the circulation channel 12 are filled with the balls to be processed. During grinding, the lower grinding disc 10 is driven to rotate, and the upper grinding disc 20 is driven to descend to apply pressure to the balls on the spiral groove 11. Under the joint action of the lower grinding disc 10 and the upper grinding disc 20, the balls perform a processing motion (rotation + revolution) with a continuously changing rotation angle along the spiral groove 11 from the inside to the outside. With the continuous change of the rotation angle, the processing trajectory is uniformly and fully enveloped on the surface of the ball, thereby obtaining better single ball precision; wherein, the upper grinding disc 10 and the upper grinding disc 20 are driven to descend to apply pressure to the balls on the spiral groove 11. A clearance hole 21 is provided in the center of disk 20, corresponding to feed port 111, eliminating resistance above feed port 111. As the balls squeeze each other, they move to discharge port 112 at the outermost edge of spiral groove 11, where they descend into circulation channel 12 and then flow out of feed port 111 at the center, re-entering spiral groove 11. Under centrifugal force, or a combination of centrifugal force, mutual squeezing, and friction, the balls pass from guide section 11a into working section 11b, completing the ball recycling process. Throughout the entire process, the movement trajectories, processing times, and grinding times of all balls are nearly identical, resulting in minimal variation in ball batch diameter and eliminating or reducing the need for screening or reprocessing.

[0046] Among them, the driving mode of the lower grinding disc 10 is not limited, including but not limited to direct drive by a motor, drive by a variable frequency motor through a reduction mechanism, etc. It should be noted that the rotation direction of the lower grinding disc 10 must be able to enable the ball to move from the inside to the outside along the spiral groove 11.

[0047] In the drawings of this embodiment, the inner and outer rings of the spiral groove 11 are at the same height. It should be noted that the spiral groove 11 can also be a three-dimensional structure that spirally ascends or descends (not shown in the drawings). The drawings of this embodiment only show a structure that is easy to process.

[0048] Reference Figure 3 The circumferential cross-section of the spiral groove 11 is V-shaped. The V-shaped cross-section can ensure that the ball rolls stably in the spiral groove 11, which helps to evenly load the ball during the grinding process. This not only improves the processing accuracy of a single ball, but also reduces the batch diameter variation of the ball, thereby improving the processing quality and consistency.

[0049] Reference Figure 2 Among them, the pitch of the guide section 11a is greater than the pitch of the working section 11b, which can make the ball move in the working section 11b. When it moves to the working section 11b, the pitch of the working section 11b is smaller, which helps to increase the residence time of the ball in the grinding processing area and improve the grinding effect and precision consistency.

[0050] Reference Figure 4 A heightened plate 14 is fixed to the center of the lower grinding disc 10. A guide groove 141 is formed on the heightened plate 14 at a position corresponding to the guide section 11a. The design of the guide groove 141 can better guide the ball along a predetermined path and improve the ball's stability within the guide section 11a.

[0051] Reference Figure 3 The circulation channel 12 is U-shaped, which can reduce the phenomenon of stagnation and accumulation, ensuring that the balls can smoothly re-enter the spiral groove 11, and realize continuous circulation processing. This design helps to improve the efficiency and consistency of the entire grinding process.

[0052] Reference Figure 3 The bottom of the lower grinding disc 10 is provided with an avoidance groove, in which a U-shaped conduit 13 is provided. The U-shaped conduit 13 has a circulation channel 12. Compared with the method of directly opening the circulation channel 12 inside the lower grinding disc 10, the U-shaped conduit 13 is formed on the outside, which is convenient for processing and implementation.

[0053] Reference Figure 1 Furthermore, the ball grinding machine also includes a pressure assembly 30 for driving the upper grinding disc 20 to rise and fall. The pressure assembly 30 includes two driving cylinders 31 symmetrically arranged along the center line of the upper grinding disc 20. The piston rods of the two driving cylinders 31 are fixed to the upper grinding disc 20 through a connecting piece 32. The lifting and lowering of the upper grinding disc 20 is controlled by the driving cylinder 31 to adapt to different ball diameters and different processing pressure requirements; two sliding rods 33 are symmetrically arranged along the center line of the upper grinding disc 20, and the connecting piece 32 is slidably connected to the two sliding rods 33, and a force sensor 34 is arranged between the connecting piece 32 and the piston rod of the driving cylinder 31. This design can ensure that the upper grinding disc 20 remains stable and symmetrical when pressure is applied, avoiding uneven grinding caused by uneven force. The use of the force sensor 34 can monitor the applied pressure in real time to ensure the consistency of pressure during the entire grinding process, thereby further improving the grinding effect and the consistency of the ball.

[0054] In order to improve the pressure control accuracy, this example applies a dual-drive mode of dual-drive cylinders 31 + dual force sensors 34, which improves the pressure control accuracy while reducing the deformation of the processing grinding wheel, improving the grinding accuracy and extending the service life of the grinding wheel.

[0055] The escape hole 21 is continuous from top to bottom, and the connector 32 has a through hole 321 formed in the center of the escape hole 21. Through the through hole 321 and the escape hole 21, the guide section 11a of the spiral groove 11 can be observed, facilitating real-time monitoring of whether the balls within the guide section 11a are trapped, accumulated, or experiencing difficulty in movement, allowing for timely adjustments or interventions.

[0056] Reference Figures 5 to 8 The present invention also provides another embodiment, which is as follows;

[0057] A support mechanism 60 is also provided for supporting the lower grinding disc 10. The lower grinding disc 10 is fixedly connected to the rotary end of the support mechanism 60 by bolts.

[0058] The supporting mechanism 60 includes a rotary tray 601, a fixed base 602, a bearing plate 603 and a driving member 604. The upper end surface of the rotary tray 601 is fixedly connected to the lower grinding disc 10 by bolts. The end of the rotary tray 601 away from the lower grinding disc 10 is at least partially in contact with the fixed base 602. The lower end surface of the bearing plate 603 is fixedly connected to the fixed base 602 by bolts. The rotary tray 601 is rotatably connected to the upper surface of the bearing plate 603. The fixed end of the driving member 604 is fixedly connected to the bottom wall inside the fixed base 602. The rotating end of the driving member 604 is provided with transmission teeth along the circumferential direction. The upper surface of the fixed base 602 is provided with an accommodating opening. The rotary tray 601 at least partially extends into the accommodating opening, and the portion extending into the accommodating opening is meshed with the transmission teeth of the rotary end of the driving member 604.

[0059] The fixed connection between the rotary tray 601 and the lower grinding disc 10 by bolts ensures that the lower grinding disc 10 can rotate with the rotary tray 601. The rotary tray 601 is partially in contact with the fixed base 602 to provide auxiliary limit for the rotary tray 601 to prevent the rotary tray 601 from being skewed or offset. The bearing plate 603 is fixedly connected to the fixed base 602 by bolts to provide a stable foundation for the entire rotating system. The rotary tray 601 is rotatably connected to the bearing plate 603, allowing the rotary tray 601 to rotate on the bearing plate The disk 603 rotates freely to reduce friction. The driving member 604 and the fixed end of the fixed base 602 are fixed to the bottom wall of the base, providing a stable installation position for the drive system. Through the connection between the rotating end of the driving member 604 and the rotating tray 601, the transmission teeth on the rotating end of the driving member 604 engage with the portion of the rotating tray 601 that extends into the receiving opening to achieve power transmission. The receiving opening of the fixed base 602 and the receiving opening of the rotating tray 601 allow the rotating tray 601 to partially extend therein so that it can engage with the transmission teeth of the driving member 604.

[0060] from Figure 7It can be seen that the transmission teeth opened along the circumference of the rotating end of the driving member 604 are arranged in the vertical direction, and are installed in the same direction as the rotating tray 601, the fixed base 602 and the bearing plate 603. When the upper grinding disc 20 squeezes the lower grinding disc 10, a certain amount of deformation will be generated between the rotating tray 601, the fixed base 602 and the bearing plate 603 along the vertical direction. For example, the gap will be squeezed and become smaller, or the rotating tray 601 and the bearing plate 603 will fall. The transmission teeth opened along the circumference of the rotating end of the driving member 604 can be rotated on the rotating tray. The corresponding tooth gaps 601 slide relative to each other in the vertical direction. The vertical sliding design of the transmission teeth can adapt to this displacement, ensuring the continuous transmission of the driving force. The relative sliding design can disperse the pressure, reduce the stress concentration at the gear meshing point, and extend the service life of the driving member 604 and the rotary tray 601. The relative sliding in the vertical direction can buffer the pressure changes between the upper and lower grinding discs, making the entire system run more smoothly. Even when displacement occurs in the vertical direction, the transmission teeth can still maintain good meshing, ensuring the reliability and continuity of power transmission.

[0061] The fixed base 602 and the bearing plate 603 provide stable support, and the driving member 604 directly drives the rotary tray 601 through gear meshing. The driving member 604 can be a variable frequency motor, a reduction motor or an intermittently driven motor to achieve precise rotation control. The use of the bearing plate 603 reduces friction during the rotation process. The driving member 604 is installed inside the fixed base 602 to save space. The connection method between the various components (such as bolt connection) is easy to disassemble and maintain. The gear meshing transmission method is highly efficient and the torque transmission is stable.

[0062] A dust removal mechanism 70 is also provided, comprising an anti-blocking member 72 and a dust removal member 71 fixedly connected to the bottom of the U-shaped guide tube 13 and located in a relief groove provided at the bottom of the lower grinding disc 10;

[0063] The dust removal member 71 includes a plurality of dust removal cylinders 711 and a splicing tube 712. A dust removal chamber 713 is provided inside each of the plurality of dust removal cylinders 711. The splicing tube 712 is provided on the outer surface of the dust removal cylinder 711 for splicing two adjacent dust removal cylinders 711. The dust removal chambers 713 provided inside the plurality of dust removal cylinders 711 are communicated with each other. A plurality of discharge ports 714 are provided at the bottom of the U-shaped guide tube 13 corresponding to the plurality of dust removal cylinders 711. The discharge ports 714 are provided in the form of a tapered hole, i.e., the diameter of one end is larger than the diameter of the other end, the end with a smaller diameter is communicated with the circulation channel 12, and the end with a larger diameter is communicated with the dust removal chamber 713. The diameter of the discharge port 714 communicating with the circulation channel 12 is small, so as not to affect the movement of the ground balls.

[0064] A negative pressure flow channel 73 is provided at the bottom of the rotary tray 601, and a connecting rod 74 is fixedly connected to the inner wall of the fixed base 602. The connecting rod 74 is at least partially located in one end of the negative pressure flow channel 73. The portion of the connecting rod 74 located in the negative pressure flow channel 73 is rotatably connected to the inner wall of the negative pressure flow channel 73, and has less air leakage. The gap can be set to be smaller to achieve the purpose of less air leakage. A mounting hole is provided on the end surface of the connecting rod 74 located in the negative pressure flow channel 73, and one end of the mounting hole is connected to the negative pressure air source through a hose. The negative pressure flow channel 73 is communicated with the mounting hole, and the outer surface of the dust removal cylinder 711 near the negative pressure flow channel 73 is communicated with the negative pressure flow channel 73 through a hose.

[0065] Multiple dust removal cylinders 711 have dust removal chambers 713 inside, which are interconnected by splicing tubes 712 to form a connected dust removal space. The bottom of the U-shaped guide tube 13 has multiple discharge ports 714. The discharge ports 714 are conical, with the small end communicating with the circulation channel 12 and the large end communicating with the dust removal chamber 713. The function is to allow dust to enter the dust removal chamber without affecting the movement of the grinding balls. Multiple dust removal cylinders 711 are connected by splicing tubes 712 to form a continuous dust removal system. A negative pressure flow channel 73 is provided at the bottom of the rotary tray 601 to provide a negative pressure source for the entire dust removal system. A connecting rod 74 in the fixed base 602 connects the negative pressure air source and the negative pressure flow channel 73 to provide continuous negative pressure for the system. The hose connection is to adapt to the rotation of the rotary tray 601. The dust removal cylinder 711 is connected to the negative pressure flow channel 73 through a hose connection to ensure that the negative pressure can effectively act on the dust removal chamber 713. The use of the negative pressure system to continuously absorb dust is intended to keep the working environment clean during the grinding process without affecting the cyclic grinding of the balls. The dust removal system is arranged at the bottom of the lower grinding disc 10 and does not interfere with the grinding process. The conical design of the discharge port 714 and the use of the anti-blocking member 72 help prevent the system from being blocked. Multiple dust removal cylinders 711 can be spliced ​​as needed to adapt to equipment of different sizes. The negative pressure system may help reduce overall energy consumption because it can reduce friction and heat generation.

[0066] The purpose is to effectively reduce the wear inside the U-shaped duct 13. At the same time, due to the conical setting of the discharge port 714, compared with the vertical hole, it effectively reduces the length of the narrow path that dust or ground particles need to pass through, avoids blockage, and absorbs the ground particles and dust attached to the ground spheres, reducing the impact of waste chips on subsequent processes, which can reduce the friction between the balls and the channel walls. At the same time, the negative pressure airflow can take away static charges, reduce static electricity accumulation, and prevent the balls from being affected by static electricity adsorption. The appropriate hole design can form an air cushion between the balls and the channel wall, reduce friction, improve transportation efficiency and the life of the U-shaped duct 13, and at the same time, the negative pressure airflow can take away the heat on the U-shaped duct 13 and the ground spheres, prevent the balls and the channel from overheating, extend the life of the U-shaped duct 13, reduce the heat generated during the grinding process, cool down inside the U-shaped duct 13, improve the grinding processing accuracy during this grinding, and improve the processing accuracy by maintaining a stable working temperature.

[0067] The anti-blocking member 72 includes a dredging rod 721, a dredging block 722 and a cylinder 723. The cylinder 723 is fixedly connected to one end of the dust collecting cylinder 711 away from the U-shaped guide tube 13, and the output end is at least partially inside the dust collecting cylinder 711. One end of the dredging rod 721 is fixedly connected to the output end of the cylinder 723 located inside the dust collecting cylinder 711. The dredging block 722 is fixedly connected to the other end of the dredging rod 721. The end of the dredging block 722 facing the discharge port 714 corresponds to the shape of the discharge port 714. The supply of the cylinder 723 The air end is connected to the negative pressure air source through the control valve. The control valve is opened at intervals, so that the output end of the cylinder 723 extends to drive the dredging rod 721 and the dredging block 722 to move. After the dredging block 722 is inserted into the discharge port 714, the control valve is closed, and the output end of the cylinder 723 drives the dredging rod 721 and the dredging block 722 to return to their original position. Since the diameter of the discharge port 714 facing the circulation channel 12 is small, it is easily blocked by waste chips. In order to avoid blocking the discharge port 714, the discharge port 714 is dredged by the dredging block 722.

[0068] The cylinder 723 provides power for the entire anti-blocking mechanism, controls the movement of the dredging rod 721 and the dredging block 722, and the dredging rod 721 serves as an intermediate piece connecting the cylinder 723 and the dredging block 722 to transmit motion. The dredging block 722 is a component that directly contacts the discharge port 714, and its shape design corresponds to the discharge port 714 to ensure effective dredging. The dust removal barrel 711 provides installation space for the entire anti-blocking mechanism and is connected to the circulation channel 12 through the discharge port 714. The control valve controls the operation of the cylinder 723 to achieve regular automatic dredging. During the grinding process of the sphere, the discharge port 714 is effectively prevented from being blocked by waste chips, ensuring the normal operation of the dust removal system, realizing automated and efficient anti-blocking functions, and reducing the use of gas sources, reducing costs, and control steps. It has a compact structure and is easy to install. The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A ball grinding machine, characterized in that: include: A lower grinding disc (10) driven to rotate, wherein the upper surface of the lower grinding disc (10) is provided with a spiral groove (11) for accommodating the spheres, and the spiral groove (11) has an inlet (111) located at the center and an outlet (112) located at the edge; An upper grinding disc (20) driven to rise and fall, disposed above the lower grinding disc (10), and used to apply pressure to the sphere on the spiral groove (11); A circulation channel (12) is provided inside the lower grinding disc (10), wherein the circulation channel (12) is connected to the feed port (111) and the discharge port (112); The upper grinding disc (20) is provided with an avoidance hole (21) in a central area corresponding to the feed port (111), and the spiral groove (11) includes a guide section (11a) corresponding to the avoidance hole (21) and a working section (11b) corresponding to the upper grinding disc (20); The pitch of the guide section (11a) is greater than the pitch of the working section (11b); A heightening plate (14) is fixed to the central area of ​​the lower grinding disc (10), and a guide groove (141) matching the guide section (11a) is provided on the heightening plate (14) at a position corresponding to the guide section (11a); The circulation channel (12) is U-shaped; An avoidance groove is provided at the bottom of the lower grinding disc (10), a U-shaped conduit (13) is provided in the avoidance groove, and the U-shaped conduit (13) has the circulation channel (12).

2. The ball grinding machine according to claim 1, characterized in that: The circumferential cross-section of the spiral groove (11) is V-shaped.

3. The ball grinding machine according to claim 1, characterized in that: It also includes a pressurizing assembly (30) for driving the upper grinding disc (20) to move up and down, the pressurizing assembly (30) including two driving cylinders (31) symmetrically arranged along the center line of the upper grinding disc (20), the piston rods of the two driving cylinders (31) being fixed to the upper grinding disc (20) via a connecting piece (32); Two sliding rods (33) are symmetrically arranged along the center line of the upper grinding disc (20), the connecting member (32) is slidably connected to the two sliding rods (33), and a force sensor (34) is arranged between the connecting member (32) and the piston rod of the driving cylinder (31).

4. The ball grinding machine according to claim 3, characterized in that: The avoidance hole (21) is through-through from top to bottom, and the connecting piece (32) is provided with a through hole (321) in a central area corresponding to the avoidance hole (21).

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