High-precision water-cooling refiner and precision regulation and control method
By designing a high-precision water-cooled finish mill, the hand-driven spiral rack and liner tube are used to accurately control the spacing between the upper and lower grinding discs, and the water-cooled heat dissipation is achieved through cooling medium circulation, which solves the shortcomings of temperature control and accuracy regulation of the existing finish mill and meets the needs of high-precision processing.
Patent Information
- Application Number
- CN202411855432.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2025-03-04
AI Technical Summary
The existing precision mills are difficult to effectively reduce the temperature and accuracy of the lower mills, and cannot meet the strict requirements of modern high-precision processing.
A high-precision water-cooled precision mill is designed, which uses hand-wheel drive spiral racks and lined tubes for spiral lifting and lowering, accurately controls the spacing between the upper and lower grinding discs, and forms a circulation of cooling medium through the hollow shaft tube, water injection pipe and bulk cone connected by coaxial rotating joints, thereby achieving effective water-cooling and heat dissipation.
It realizes precise control of the grinding accuracy of the precision mill, and reduces the temperature of the lower grinding disc through effective water cooling and heat dissipation, ensuring that the ambient temperature during material crushing is within a certain range, meeting the needs of high-precision processing.
Smart Images
Figure CN119549237A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of fine grinders, and in particular relates to a high-precision water-cooled fine grinder and a precision control method. Background Art
[0002] In many industrial manufacturing fields, such as optical lens processing and precision mechanical parts manufacturing, precision grinding machines play a vital role.
[0003] Among them, the fine grinder grinds the material through a high-speed rotating grinding disc and a fixed toothed disc. During this process, the grinding disc and the toothed disc will accumulate a large amount of heat due to the friction of the material. If this heat cannot be dissipated in a timely and effective manner, the temperature of the grinding disc will be too high. Traditional heat dissipation methods usually use air cooling or water cooling, but air cooling is difficult to meet the heat dissipation requirements of the grinding disc under long-term high-intensity work. When water cooling is used for heat dissipation, it is difficult to directly export the heat accumulated on the grinding disc, and the heat dissipation effect is not good. At the same time, existing fine grinders also have limitations in the control of grinding precision. Most of them can only make relatively rough adjustments, which is difficult to meet the stringent requirements of modern high-precision processing.
[0004] Therefore, there is an urgent need for a high-precision water-cooled fine grinding machine with high control accuracy and good heat dissipation. Summary of the invention
[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a high-precision water-cooled fine grinder and a precision control method, which solves the problem that the existing fine grinder is difficult to effectively reduce the temperature of the lower grinding disc and the precision control is relatively rough.
[0006] To achieve the above object, the technical solution adopted by the present invention is: a high-precision water-cooled fine grinding machine, comprising a shell with a grinding chamber and a mounting chamber built therein, a discharge port is arranged at the bottom of the grinding chamber, a feed port connected to the top of the grinding chamber is arranged on the shell, and an upper grinding disc arranged around the outer periphery of the feed port is arranged on the inner side of the top of the grinding chamber; An inner lining tube is movably embedded in the installation cavity, a lower grinding disc that can move toward the upper grinding disc in a vertical direction is rotatably connected in the inner lining tube, a crushing gap for grinding materials is sandwiched between the lower grinding disc and the upper grinding disc, and a water cooling and heat dissipation mechanism is arranged in the lower grinding disc; The shell is provided with spiral limiting grooves arranged in a spiral pattern, a spiral rack connected to the inner liner tube is slidably arranged in the spiral limiting groove, and the spiral rack is meshedly connected to a hand wheel that can be rotated to any angle.
[0007] Optionally, the water-cooling heat dissipation mechanism includes a hollow shaft tube and a bulk material cone coaxially arranged with the lower grinding disc, the hollow shaft tube is rotatably connected to the inside of the inner lining tube, and the lower grinding disc and the bulk material cone are sequentially sleeved on the end of the hollow shaft tube; Wherein, a water injection cavity is formed between the bulk material cone and the upper grinding disc, and a circulating cooling cavity connected to the water injection cavity is arranged in the lower grinding disc; A water injection pipe connected to the water injection cavity is embedded in the hollow shaft tube, and a drainage cavity connected to the circulating cooling cavity is formed by the outer side of the water injection pipe and the inner side of the hollow shaft tube; The water injection pipe is coaxially arranged with the hollow shaft pipe, and the hollow shaft pipe and the water injection pipe can be connected to a coaxial rotating joint, and the coaxial rotating joint can be connected to a circulating water source.
[0008] Optionally, the lower grinding disc includes a lower grinding disc and a lower grinding cover plate attached to the lower grinding disc, and the circulating cooling cavity is formed between the lower grinding disc and the lower grinding cover plate. The circulating cooling cavity is annular and wavy, and its two ends can be respectively connected to the water injection cavity and the drainage cavity.
[0009] Optionally, the bottom of the grinding chamber is provided with a rubber dustproof pad ring capable of elastically abutting against the bottom of the lower grinding disc.
[0010] Optionally, a material-shifting piece is provided on the outer periphery of the bottom of the lower grinding disc.
[0011] Optionally, a pulley is sleeved on the hollow shaft tube, and the pulley can be connected to the output end of the driving motor through a synchronous belt drive.
[0012] Optionally, a plurality of groups of bulk blocks arranged in a spiral shape are provided on the conical surface of the bulk cone.
[0013] Optionally, the shell includes a mounting shell for embedding the liner tube, a grinding shell connected to the top of the mounting shell, and a flip cover hinged on the grinding shell, wherein the flip cover can be sealed and connected to the top opening of the grinding shell, and is surrounded by the grinding shell to form the grinding chamber; Wherein, the upper grinding disc and the feed port are both placed on the cover plate.
[0014] Optionally, the hand wheel is rotatably connected to a U-shaped support, and a scale gear is sleeved on the hand wheel, and a leaf spring capable of engaging with a tooth groove on the scale gear is provided on the U-shaped support.
[0015] A method for controlling the precision of a high-precision water-cooled fine grinder, implemented using any one of the high-precision water-cooled fine grinders described above, comprises the following steps; Step 1: Turn the hand wheel in the first direction to make the spiral rack and the inner liner pipe spirally rise along the spiral limiting groove until the lower grinding disc on the inner liner pipe is completely against the upper grinding disc, and record the angle of the hand wheel at this time as the initial angle; Step 2: Rotate the handwheel in the second direction to make the spiral rack and the inner liner tube descend along the spiral limiting groove. At this time, the angle of rotation of the handwheel compared to the initial angle is linearly related to the distance between the lower grinding disc and the upper grinding disc. By adjusting the angle of rotation of the handwheel compared to the initial angle, the distance between the upper grinding disc and the lower grinding disc can be accurately controlled.
[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention drives the spiral rack meshing with the rotatable hand wheel to perform spiral lifting motion, thereby driving the inner liner tube that can move synchronously with the spiral rack to spirally lift and lower the lower grinding disc that can be synchronously lifted and lowered with the inner liner tube to approach or move away from the upper grinding disc. The lifting distance of the lower grinding disc is linearly related to the rotation angle of the hand wheel. By controlling the rotation angle of the hand wheel, the spacing between the upper grinding disc and the lower grinding disc can be accurately controlled, that is, the grinding accuracy of the fine grinder can be accurately controlled. (2) The present invention connects a hollow shaft tube and a water injection pipe that can rotate coaxially with the lower grinding disc through a coaxial rotating joint. The water injection chamber between the bulk material cone and the lower grinding disc can be connected to the water injection pipe, and the water injection chamber can be connected to the circulating cooling chamber inside the lower grinding disc, and the drainage chamber between the hollow shaft tube and the water injection pipe can be connected to the circulating cooling chamber. When the cooling medium enters the water injection pipe through the coaxial rotating joint, it can pass through the water injection chamber, the circulating cooling chamber and the drainage chamber in sequence, and can also be discharged from the coaxial rotating joint. In this way, a circulation of the cooling medium can be formed inside the lower grinding disc. When the lower grinding disc rotates at a high speed for a long time, the lower grinding disc can also be effectively cooled by water, and the temperature of the lower grinding disc can be effectively reduced, so that the ambient temperature during material crushing can be controlled within a certain range. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments.
[0018] Figure 1 It is a structural schematic diagram of a high-precision water-cooled fine grinding machine in a preferred embodiment of the present invention; Figure 2 It is a schematic cross-sectional view of a high-precision water-cooled fine grinding machine in a preferred embodiment of the present invention; Figure 3 It is a structural schematic diagram of an upper grinding disc, a bulk material cone, a mounting shell, a hollow shaft tube and a water injection pipe in a preferred embodiment of the present invention; Figure 4 It is a schematic diagram of the structure when the hand wheel is meshedly connected to the spiral rack in a preferred embodiment of the present invention; Figure 5It is a structural schematic diagram of the lower mill cover plate in a preferred embodiment of the present invention; Figure 6 It is a schematic diagram of the structure of the lower grinding chassis in a preferred embodiment of the present invention; Among them, 1. Shell; 101. Mounting shell; 1011. Spiral limit groove; 102. Grinding shell; 1021. Discharge port; 103. Flip cover; 1031. Feed port; 2. Upper grinding disc; 3. Lining pipe; 4. Lower grinding disc; 401. Circulating cooling chamber; 402. Lower grinding chassis; 403. Lower grinding cover plate; 5. Spiral rack; 6. Hand wheel; 7. Hollow shaft tube; 8. Bulk material cone; 801. Bulk material block; 82. Water injection chamber; 9. Water injection pipe; 97. Drainage chamber; 10. Coaxial rotating joint; 11. Rubber dustproof gasket; 12. Material shifting piece; 13. Pulley; 14. Synchronous belt; 15. Driving motor; 16. U-shaped support; 17. Scale gear; 18. Leaf spring. DETAILED DESCRIPTION
[0019] The present invention will now be further described in detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.
[0020] It should be noted that if there are directional indications (such as up, down, bottom, top, etc.) involved in this embodiment, the directional indication is only used to explain the relative position relationship, movement, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. Unless otherwise clearly specified and defined, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Embodiment 1
[0021] like Figure 1-Figure 6 As shown, a high-precision water-cooled fine grinding machine comprises a housing 1 with a grinding chamber and a mounting chamber built therein, a discharge port 1021 is arranged at the bottom of the grinding chamber, a feed port 1031 communicating with the top of the grinding chamber is arranged on the housing 1, and an upper grinding disc 2 arranged around the outer periphery of the feed port 1031 is arranged on the inner side of the top of the grinding chamber; An inner lining tube 3 is movably embedded in the installation cavity, a lower grinding disc 4 which can move toward the upper grinding disc 2 in a vertical direction is rotatably connected in the inner lining tube 3, a crushing gap for grinding materials is sandwiched between the lower grinding disc 4 and the upper grinding disc 2, and a water cooling and heat dissipation mechanism is provided in the lower grinding disc 4; The shell 1 is provided with spiral limiting grooves 1011 arranged in a spiral shape, and a spiral rack 5 connected to the inner liner tube 3 is slidably arranged in the spiral limiting groove 1011, and the spiral rack 5 is meshedly connected to a hand wheel 6 that can be rotated to any angle.
[0022] Specifically, the material can enter the grinding chamber through the feed port 1031 and needs to pass through the crushing gap between the upper grinding disc 2 and the lower grinding disc 4. In this technical solution, the upper grinding disc 2 is fixed and the lower grinding disc 4 can rotate at high speed. The material is crushed when passing through the crushing gap between the upper grinding disc 2 and the lower grinding disc 4, and then falls to the bottom of the grinding chamber and is discharged through the discharge port 1021.
[0023] Furthermore, the end of the hand wheel 6 is meshed with the spiral rack 5, and when the hand wheel 6 is turned, the spiral rack 5 and the inner liner 3 can be spirally lifted and lowered along the spiral limit groove 1011. At the same time, the lower grinding disc 4 is rotatably connected to the inner liner 3, and the rotation axis of the lower grinding disc 4 coincides with the central axis of the inner liner 3, and the lower grinding disc 4 can be synchronously lifted and lowered with the inner liner 3. When the hand wheel 6 is turned until the lower grinding disc 4 abuts against the upper grinding disc 2, the spacing between the upper grinding disc 2 and the lower grinding disc 4 is zero. Subsequently, the hand wheel 6 is rotated in the opposite direction, so that the lower grinding disc 4 can be gradually moved away from the upper grinding disc 2, and in this process, the angle of rotation of the hand wheel 6 is linearly related to the spacing between the lower grinding disc 4 and the upper grinding disc 2 at this time. That is, by controlling the angle of rotation of the hand wheel 6, the spacing between the upper grinding disc 2 and the lower grinding disc 4 can be accurately controlled, thereby effectively increasing the accuracy level of the material crushed by the fine grinder.
[0024] Further, such as Figure 2 , Figure 3 , Figure 5 , Figure 6 As shown, the water-cooling heat dissipation mechanism includes a hollow shaft tube 7 and a bulk material cone 8 which are coaxially arranged with the lower grinding disc 4. The hollow shaft tube 7 is rotatably connected to the inside of the inner liner tube 3, that is, the outer periphery of the hollow shaft tube 7 can be sleeved with a precision bearing which can be embedded in the inner liner tube 3. The hollow shaft tube 7 and the inner liner tube 3 are coaxially arranged. The lower grinding disc 4 and the bulk material cone 8 are sequentially sleeved on the ends of the hollow shaft tube 7. The hollow shaft tube 7, the inner liner tube 3, the lower grinding disc 4 and the bulk material cone 8 are coaxially arranged. A pulley 13 is sleeved on the hollow shaft tube 7. The pulley 13 can be driven to be connected to the output end of the driving motor 15 through a synchronous belt 14. The driving motor 15 can drive the hollow shaft tube 7, the inner liner tube 3, the lower grinding disc 4 and the bulk material cone 8 to rotate smoothly and efficiently by belt transmission, which can effectively ensure the stability and efficiency of the fine grinder.
[0025] At the same time, since the high-speed rotating lower grinding disc 4 will accumulate more heat, lowering the temperature of the lower grinding disc 4 can effectively control the ambient temperature during material crushing. Therefore, in the above structure, a water injection cavity 82 is formed between the bulk material cone 8 and the upper grinding disc 2, and a circulating cooling cavity 401 connected to the water injection cavity 82 is provided in the lower grinding disc 4; a water injection pipe 9 connected to the water injection cavity 82 is embedded in the hollow shaft tube 7, and a drainage cavity 97 connected to the circulating cooling cavity 401 is formed between the outer side of the water injection pipe 9 and the inner side of the hollow shaft tube 7; the water injection pipe 9 is coaxially arranged with the hollow shaft tube 7, and the hollow shaft tube 7 and the water injection pipe 9 can be connected to a coaxial rotating joint 10, and the coaxial rotating joint 10 can be connected to a circulating water source. Specifically, the coaxial rotating joint 10 is a prior art. When the hollow shaft tube 7 and the water injection pipe 9 rotate at high speed, a cooling medium with relatively low temperature and relatively high specific heat capacity can be introduced through the water inlet connected to the coaxial rotating joint 10 and the water injection pipe 9. Figure 2 As shown, the cooling medium introduced through the water injection pipe 9 can enter the water injection chamber 82, the circulating cooling chamber 401 and the drainage chamber 97 in sequence, and can then be discharged through the drainage port on the coaxial rotating joint 10 that is connected to the drainage chamber 97. When the cooling medium passes through these chambers, it will directly take away the heat accumulated on the lower grinding disc 4 and the bulk cone 8 through the heat conduction effect. The heat dissipation efficiency is high, and the temperature of the material during crushing can be effectively controlled.
[0026] As mentioned above, the water inlet and the water outlet on the coaxial rotating joint 10 can be connected to the water cooling circulation equipment in the prior art through a pipeline, so that the temperature of the lower grinding disc 4 and the bulk cone 8 can be effectively reduced.
[0027] Further, such as Figure 3 , Figure 5 , Figure 6 As shown, the lower grinding disc 4 includes a lower grinding disc 402 and a lower grinding cover plate 403 attached to the lower grinding disc 402. The circulating cooling cavity 401 is formed between the lower grinding disc 402 and the lower grinding cover plate 403. The circulating cooling cavity 401 is annular and wavy, and its two ends can be respectively connected to the water injection cavity 82 and the drainage cavity 97. Specifically, the cooling medium that enters the annular and wavy circulating cooling cavity 401 through the water injection cavity 82 can form a complex one-way flow path on the side close to the lower grinding disc 402 and the lower grinding cover plate 403, so as to cover different positions on the lower grinding disc 4 where there may be temperature differences, so that the cooling medium can effectively take away heat at different positions, so that the overall temperature of the lower grinding disc 4 remains relatively consistent, so as to meet some process requirements with high requirements for temperature uniformity.
[0028] In this embodiment, if Figure 2As shown, the bottom of the grinding chamber is provided with a rubber dustproof ring 11 which can elastically abut against the bottom of the lower grinding disc 4. The rubber dustproof ring 11 can cooperate with the lower grinding disc 4 to block the grinding chamber and the installation chamber to prevent the crushed material from entering the installation chamber and affecting the movement of the liner tube 3 and the hollow shaft tube 7.
[0029] Further, such as Figure 3 As shown, a material-shifting piece 12 is provided on the bottom periphery of the lower grinding disc 4 , and the material-shifting piece 12 can rotate synchronously with the lower grinding disc 4 , and the material-shifting piece 12 can sweep the crushed material accumulated at the bottom of the grinding chamber so that it can be discharged from the discharge port 1021 .
[0030] Further, such as Figure 3 As shown, a plurality of groups of bulk blocks 801 arranged in a spiral shape are arranged on the conical surface of the bulk cone 8, and the conical surface of the bulk cone 8 faces the feed port 1031 on the shell 1, so that when the bulk cone 8 rotates, the material can be evenly scattered into the area between the upper grinding disc 2 and the lower grinding disc 4.
[0031] Further, such as Figure 2 As shown, the housing 1 includes a mounting shell 101 for embedding the inner liner tube 3, a grinding shell 102 connected to the top of the mounting shell 101, and a flip cover 103 hinged on the grinding shell 102, wherein the flip cover 103 can be sealed and connected to the top opening of the grinding shell 102, and is surrounded by the grinding shell 102 to form the grinding chamber, wherein the upper grinding disc 2 and the feed port 1031 are both placed on the cover plate. Specifically, the flip cover 103 that can be opened and closed can facilitate maintenance personnel to check the internal conditions of the grinding chamber after the fine grinder stops operating, and the flip cover 103 can be connected to the grinding shell 102 by fasteners such as bolts, nuts, buckles, etc. in the prior art, so as to facilitate the disassembly and replacement of easily worn parts such as the upper grinding disc 2 and the lower grinding disc 4.
[0032] Further, such as Figure 4 As shown, in the present technical solution, in order to conveniently fix the hand wheel 6 at any angle, the hand wheel 6 is rotatably connected to the U-shaped support 16, and a graduated gear 17 is sleeved on the hand wheel 6. The graduated gear 17 is provided with graduated lines corresponding to the lifting distance of the lower grinding disc 4 according to the position of the tooth groove. The graduated gear 17 can accurately reflect the rotation angle of the hand wheel 6. At the same time, the U-shaped support 16 is provided with a leaf spring 18 that can be engaged with the tooth groove on the graduated gear 17. The end of the leaf spring 18 can be pressed into the tooth groove on the graduated gear 17, thereby limiting the rotation of the graduated gear 17 and fixing the angle of the hand wheel 6. When the hand wheel 6 needs to be rotated, the leaf spring 18 only needs to be pulled up. Embodiment 2
[0033] like Figure 1-Figure 6As shown, based on the first embodiment, a method for controlling the precision of a high-precision water-cooled fine grinder is implemented by using the aforementioned high-precision water-cooled fine grinder, and includes the following steps: Step 1: Turn the hand wheel 6 in the first direction to make the spiral rack 5 and the inner liner tube 3 spirally rise along the spiral limiting groove 1011 until the lower grinding disc 4 on the inner liner tube 3 is completely against the upper grinding disc 2, and record the angle of the hand wheel 6 at this time as the initial angle; Step 2: Rotate the handwheel 6 in the second direction to make the spiral rack 5 and the inner liner tube 3 descend in a spiral along the spiral limiting groove 1011. At this time, the angle of rotation of the handwheel 6 compared to the initial angle is linearly related to the distance between the lower grinding disc 4 and the upper grinding disc 2. By adjusting the angle of rotation of the handwheel 6 compared to the initial angle, the distance between the upper grinding disc 2 and the lower grinding disc 4 can be accurately controlled. Among them, the higher the transmission accuracy level of the handwheel 6 and the spiral rack 5, the higher the accuracy of the material crushing of the fine grinder controlled by the handwheel 6.
[0034] As mentioned above, the first direction corresponds to the clockwise direction or the counterclockwise direction, which is specifically based on the spiral direction of the spiral limiting groove 1011. The second direction is opposite to the first direction.
[0035] Working principle: First, adjust the distance between the upper grinding disc 2 and the lower grinding disc 4 according to the particle size of the material to be crushed. Specifically, open the leaf spring 18 connected to the scale gear 17 and turn the hand wheel 6, so that the spiral rack 5 and the inner liner tube 3 spirally rise along the spiral limit groove 1011 until the lower grinding disc 4 is completely against the upper grinding disc 2. Then turn the hand wheel 6 in the opposite direction, judge the distance of the lower grinding disc 4 descending according to the rotation angle of the scale gear 17, adjust the distance between the upper grinding disc 2 and the lower grinding disc 4 to the predetermined distance, loosen the leaf spring 18, and make the leaf spring 18 engage with the tooth groove on the scale gear 17. Then start the drive motor 15 and continue to pass the cooling medium into the water injection pipe 9 through the coaxial rotating joint 10. The cooling medium can circulate inside the lower grinding disc 4, so that the temperature of the lower grinding disc 4 can be controlled within a certain range. Then, pour the material to be crushed into the feed port 1031 at a uniform speed. Driven by the driving motor 15, the lower grinding disc 4 and the bulking cone 8 can rotate at high speed, and when the material falls onto the bulking cone 8, the bulking cone 8 can evenly scatter the material into the area between the upper grinding disc 2 and the lower grinding disc 4, and then the material can enter the crushing gap between the upper grinding disc 2 and the lower grinding disc 4 under the action of centrifugal force. During this period, the material can repeatedly collide and squeeze between the upper grinding disc 2 and the lower grinding disc 4 to achieve the crushing effect. Subsequently, the crushed material can be scattered to the bottom of the grinding chamber under the action of centrifugal force and gravity. At this time, the material-pickling piece 12 that rotates synchronously with the lower grinding disc 4 can sweep the material scattered at the bottom of the grinding chamber and push it to the discharge port 1021 at the bottom of the grinding chamber, so that the crushed material can be discharged from the discharge port 1021. The fine grinding machine in this technical solution can not only accurately control the precision of material crushing, but also reduce and control the temperature of the lower grinding disc 4 by water cooling and heat dissipation, so as to control the ambient temperature of the material during crushing within a certain range and ensure the state of the material.
[0036] The above is based on the ideal embodiment of the present invention. Through the above description, relevant personnel can make various changes and modifications without departing from the technical concept of the present invention. The technical scope of the present invention is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.
Claims
1. A high-precision water-cooled fine grinding machine, characterized in that: It comprises a shell (1) with a grinding chamber and a mounting chamber built therein, the bottom of the grinding chamber being provided with a discharge port (1021), the shell (1) being provided with a feed port (1031) connected to the top of the grinding chamber, and an upper grinding disc (2) being arranged around the outer periphery of the feed port (1031) being provided on the inner side of the top of the grinding chamber; An inner lining tube (3) is movably embedded in the installation cavity, a lower grinding disc (4) which is rotatably connected to the inner lining tube (3) and can move toward the upper grinding disc (2) in a vertical direction, a crushing gap for grinding materials is formed between the lower grinding disc (4) and the upper grinding disc (2), and a water cooling and heat dissipation mechanism is provided in the lower grinding disc (4); The shell (1) is provided with spiral limiting grooves (1011) arranged in a spiral pattern, a spiral rack (5) connected to the inner liner tube (3) is slidably arranged in the spiral limiting groove (1011), and the spiral rack (5) is meshingly connected to a hand wheel (6) that can be rotated to any angle.
2. The high-precision water-cooled fine grinding machine according to claim 1, characterized in that: The water-cooling heat dissipation mechanism comprises a hollow shaft tube (7) and a bulk material cone (8) which are coaxially arranged with the lower grinding disc (4); the hollow shaft tube (7) is rotatably connected to the inside of the inner lining tube (3); the lower grinding disc (4) and the bulk material cone (8) are sequentially sleeved on the ends of the hollow shaft tube (7); A water injection cavity (82) is formed between the bulk material cone (8) and the upper grinding disc (2), and a circulating cooling cavity (401) connected to the water injection cavity (82) is provided in the lower grinding disc (4); A water injection pipe (9) communicating with the water injection cavity (82) is embedded in the hollow shaft tube (7), and a drainage cavity (97) communicating with the circulating cooling cavity (401) is formed between the outer side of the water injection pipe (9) and the inner side of the hollow shaft tube (7); The water injection pipe (9) is coaxially arranged with the hollow shaft pipe (7), and the hollow shaft pipe (7) and the water injection pipe (9) can be connected to a coaxial rotating joint (10), and the coaxial rotating joint (10) can be connected to a circulating water source.
3. The high-precision water-cooled fine grinding machine according to claim 2, characterized in that: The lower grinding disc (4) comprises a lower grinding disc (402) and a lower grinding cover plate (403) attached to the lower grinding disc (402); the circulating cooling cavity (401) is formed between the lower grinding disc (402) and the lower grinding cover plate (403); the circulating cooling cavity (401) is annular and wavy, and its two ends can be connected to the water injection cavity (82) and the drainage cavity (97) respectively.
4. The high-precision water-cooled fine grinding machine according to claim 1, characterized in that: The bottom of the grinding chamber is provided with a rubber dustproof pad ring (11) capable of elastically abutting against the bottom of the lower grinding disc (4).
5. The high-precision water-cooled fine grinding machine according to claim 1, characterized in that: A material shifting piece (12) is provided on the outer periphery of the bottom of the lower grinding disc (4).
6. The high-precision water-cooled fine grinding machine according to claim 2, characterized in that: A pulley (13) is sleeved on the hollow shaft tube (7), and the pulley (13) can be driven and connected to the output end of the drive motor (15) through a synchronous belt (14).
7. The high-precision water-cooled fine grinding machine according to claim 2, characterized in that: A plurality of groups of bulk material blocks (801) arranged in a spiral shape are arranged on the cone surface of the bulk material cone (8).
8. The high-precision water-cooled fine grinding machine according to claim 1, characterized in that: The shell (1) comprises a mounting shell (101) for embedding the inner liner tube (3), a grinding shell (102) connected to the top of the mounting shell (101), and a flip cover (103) hinged on the grinding shell (102); the flip cover (103) can be sealed and connected to the top opening of the grinding shell (102), and is surrounded by the grinding shell (102) to form the grinding chamber; Wherein, the upper grinding disc (2) and the feed port (1031) are both placed on the cover plate.
9. The high-precision water-cooled fine grinding machine according to claim 1, characterized in that: The hand wheel (6) is rotatably connected to the U-shaped support (16), and a scale gear (17) is sleeved on the hand wheel (6). The U-shaped support (16) is provided with a leaf spring (18) that can be engaged with a tooth groove on the scale gear (17).
10. A method for controlling the precision of a high-precision water-cooled fine grinder, implemented by using the high-precision water-cooled fine grinder according to any one of claims 1 to 9, characterized in that: The steps include: Step 1: rotating the hand wheel (6) in a first direction, so that the spiral rack (5) and the inner liner tube (3) spirally rise along the spiral limiting groove (1011) until the lower grinding disc (4) on the inner liner tube (3) completely abuts against the upper grinding disc (2), and recording the angle of the hand wheel (6) at this time as the initial angle; Step 2: Rotate the hand wheel (6) in the second direction so that the spiral rack (5) and the inner liner tube (3) spirally descend along the spiral limit groove (1011). At this time, the angle at which the hand wheel (6) is rotated compared to the initial angle is linearly related to the distance between the lower grinding disc (4) and the upper grinding disc (2). By adjusting the angle at which the hand wheel (6) is rotated compared to the initial angle, the distance between the upper grinding disc (2) and the lower grinding disc (4) can be accurately controlled.