Finish milling machine with self-cleaning function

Abstract

The invention discloses a finish milling machine with a self-cleaning function, and relates to the technical field of finish milling machines.The finish milling machine comprises a lathe bed assembly, a cutter assembly and a cleaning assembly, a feeding assembly is arranged at the upper end of the lathe bed assembly, the cutter assembly is arranged on one side of the feeding assembly, and the cleaning assembly is arranged at the output end of the cutter assembly; the cleaning assembly is used for cleaning scraps on the cutter, and the collecting assembly is arranged at the bottom end of the lathe bed assembly and used for collecting waste liquid.

Description

Technical Field

[0001] The present invention relates to the technical field of precision milling machines, and specifically, to a precision milling machine with a self-cleaning function. Background Art

[0002] A precision milling machine is a machine tool (milling machine) that uses a milling cutter to machine various surfaces on a workpiece. On a milling machine, planes (horizontal plane, vertical plane), grooves (keyway, T-slot, dovetail groove, etc.), spline parts (gear, spline shaft, sprocket), helical surfaces (thread, helical groove), and various curved surfaces can be machined. The workpiece is installed on the workbench or attachments such as a dividing head. The rotation of the milling cutter is the main movement, supplemented by the feeding movement of the workbench or milling head, and the workpiece can obtain the required machined surface. Since it is multi-edge interrupted cutting, the productivity of the milling machine is relatively high. Simply put, a milling machine is a machine tool that can perform milling, drilling, and boring operations on a workpiece, and is widely used in the machinery manufacturing and repair departments.

[0003] During the processing of existing precision milling machines, waste chips will be generated. When the waste chips come into contact with the tool surface for a long time, it will increase the friction between the tool and the workpiece, resulting in accelerated tool wear. This will not only reduce the service life of the tool, but also increase the processing cost, so it is necessary to clean it. Most of them are cleaned through coolant, which can not only clean the waste chips, but also cool the tool. However, the coolant will be mixed with the waste chips and cannot be directly recycled. Therefore, when recycling the waste liquid later, it is necessary to separate it, which increases the working cost. Summary of the Invention

[0004] The purpose of the present invention is to provide a precision milling machine with a self-cleaning function to solve the problems raised in the prior art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A precision milling machine with a self-cleaning function, the precision milling machine includes a bed component, a tool component, and a cleaning component. There is a feeding component provided at the upper end of the bed component. A tool component is provided on one side of the feeding component. A cleaning component is provided at the output end of the tool component. The cleaning component is used to clean the waste chips on the tool. A collection component is provided at the bottom end of the bed component. The collection component is used to collect the waste liquid.

[0007] Specifically, the bed component is the working part of the device and is used to place the workpiece. The feeding component is used to control the movement of the tool component. The tool component is used to machine the workpiece. A large amount of waste chips will be generated during the work of the tool component, so it is necessary to clean the milling cutter. Most of them are coolant, which can not only clean the waste chips, but also cool the high-speed rotating milling cutter. However, the coolant will be mixed with the waste chips, so the coolant cannot be recycled. The collection component is used to collect the mixed waste liquid and process it.

[0008] The tool assembly includes a connecting piece and a driving motor. The connecting piece is sleeved on the driving motor. The fixed end of the driving motor is fixedly connected to the connecting piece. The output end of the driving motor is located at the bottom end. A milling cutter is provided at the output end of the driving motor. A cleaning component is provided on one side of the driving motor.

[0009] Specifically, the connecting piece is used to fix the driving motor. The driving motor is perpendicular to the horizontal line. The driving motor serves as a power source to control the rotation of the milling cutter. The milling cutter is located at the bottom end of the driving motor. The milling cutter is clamped and connected to the output end of the driving motor. The cleaning component is used to spray coolant on the milling cutter.

[0010] The cleaning component includes a housing and a nozzle. The housing is located on one side of the driving motor. The outer shell of the driving motor is fixedly connected to the housing. The nozzle is located inside the housing. The nozzle is fixedly connected to the inside of the housing. The input end of the nozzle is connected to an external pipeline. A through hole is provided on one side of the housing. The through hole is located on the side of the housing close to the milling cutter. The output end of the nozzle is communicated with the through hole. A detection component is provided inside the housing.

[0011] Specifically, the housing is located on one side of the driving motor. The housing is fixedly connected to the outer shell of the driving motor. The nozzle is located inside the housing. The nozzle serves as an output part to transport coolant and spray the coolant onto the milling cutter. The housing serves as a protective part to protect the nozzle itself and the connection between the nozzle and the pipeline. A detection component is provided at the bottom end of the housing. The detection component controls the valve opening value of the nozzle through the electrical signal generated by itself, so as to achieve the effective utilization of energy.

[0012] The detection component includes a protective shell and a piezoelectric element. The protective shell is located on one side of the housing. The protective shell is fixedly connected to the housing. The piezoelectric element is provided inside the protective shell. A protective film is sleeved outside the piezoelectric element.

[0013] Specifically, when the tool assembly processes a workpiece, the milling cutter will vibrate, which then affects the driving motor. Since the detection component is located on the housing and the housing is fixedly connected to the outer shell of the driving motor, it will ultimately affect the piezoelectric element in the detection component. When the piezoelectric element is subjected to mechanical stress, the charge distribution inside it will change, thereby generating charges on the surface of the material. The amplitude of its mechanical vibration is proportional to the magnitude of the electrical signal. The protective shell is used to protect the internal components and provide mechanical support. The protective film is used to cover the piezoelectric element to prevent the piezoelectric element from being affected by dust and humidity. Damping materials are also provided inside the protective shell to absorb and attenuate high-frequency vibrations and prevent mechanical resonance inside the sensor. The threshold value of the nozzle is controlled by the electrical signal generated by the piezoelectric element. When the electrical signal is larger, the vibration amplitude of the milling cutter is larger, which also means that the contact area between the milling cutter and the workpiece is larger. At the same time, the wear state of the milling cutter can also be judged. The wear state of the milling cutter is inversely proportional to the vibration amplitude.

[0014] The feeding assembly includes a moving plate and a vertical plate. The moving plate is located on one side of the connecting piece, and the connecting piece is fixedly connected to the moving plate. There is a vertical plate on one side of the moving plate, and a lead screw is provided on the vertical plate. There is a connecting block on one side of the moving plate. The connecting block is located on the side of the moving plate close to the vertical plate and is fixedly connected to the moving plate. The connecting block is threadedly connected to the lead screw. There is a first rotating motor on one side of the vertical plate. The fixed end of the first rotating motor is fixedly connected to the vertical plate, and the output end of the first rotating motor is fixedly connected to the lead screw.

[0015] Specifically, the feeding assembly controls the movement of the tool assembly through multiple driving parts. Its connecting piece is used to fix the first rotating motor on the moving plate. The vertical plate serves as a support piece and is connected to the bed body assembly. The lead screw is parallel to the horizontal line. The first rotating motor serves as a power source to control the rotation of the lead screw. The rotation of the lead screw drives the connecting block to move, and the movement of the connecting block drives the moving plate to move. Among them, the first rotating motor and the lead screw are used to provide lateral movement.

[0016] The bed body assembly includes columns and a frame. The frame is located at the bottom end of the vertical plate. Both ends of the frame are fixedly connected to the bottom end of the vertical plate. The middle of the frame is hollowed out. There are columns at the bottom end of the frame, and the columns are fixedly connected to the bottom end of the frame. There is a connecting plate inside the frame. One end of the connecting plate is fixedly connected to the frame, and the other end of the connecting plate is provided with a workbench, and the connecting plate is fixedly connected to the workbench.

[0017] Specifically, the middle of the frame is hollowed out for installing the workbench and also facilitates the flow of waste liquid. The workbench is located in the middle of the frame, and there is a space between the workbench and the frame. There are four columns, which are located at the four corners of the bottom end of the frame. Among them, the connecting plate is located at the bottom end of the frame. The connecting plate serves as a connecting piece to connect the frame and the workbench. Both the frame and the workbench are parallel to the horizontal line.

[0018] The collection assembly includes a collection bin and a main cylinder. The collection bin is located at the bottom end of the frame, and the collection bin is fixedly connected to the frame. There is a main cylinder at the bottom end of the collection bin, and the main cylinder is communicated with the collection bin.

[0019] Specifically, the collection assembly is used to collect the waste liquid generated during processing. The collection bin is located at the bottom end of the frame and is fixedly connected to the bottom end of the frame. There is an output end opened at the bottom end of the collection bin. The waste liquid accumulates on the workbench, then flows to the edge end of the workbench, and then falls into the collection bin, and finally flows to the output end. The top end of the main cylinder is connected to the output end of the collection bin.

[0020] The screening assembly includes a secondary cylinder and a second rotating motor. The secondary cylinder is located inside the main cylinder, and the secondary cylinder is rotatably connected to the main cylinder. There is a second rotating motor at the bottom end of the main cylinder. The fixed end of the second rotating motor is fixedly connected to the main cylinder, and the output end of the second rotating motor is fixedly connected to the secondary cylinder. The wall of the secondary cylinder is provided with a filter screen.

[0021] Specifically, when the waste liquid accumulates in the main cylinder, its screening component is used to separate the waste chips from the coolant in the waste liquid. The waste liquid mainly flows to the secondary cylinder. A filter plate is provided on the cylinder wall of the secondary cylinder, and the filter plate is used to allow the coolant to flow. The second rotating motor is located at the bottom end of the main cylinder, and the output end of the second rotating motor is fixedly connected to the bottom end of the secondary cylinder. The second rotating motor serves as a power source to control the rotation of the secondary cylinder. Thus, during the rotation of the secondary cylinder, the waste liquid will be driven to rotate, generating centrifugal force. Under the same centrifugal force, the displacement is proportional to the mass, and the waste chips move faster than the coolant. The waste liquid will move outward, and the coolant will flow out through the filter screen, while the waste chips will move to the edge end of the secondary cylinder. Two output ends are provided at the bottom end of the main cylinder, which are respectively used to collect the coolant and the waste chips.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] 1. During the processing of the tool component in the present invention, since the milling cutter contacts the workpiece, when the milling cutter rotates at a high speed, the milling cutter will vibrate, which finally affects the detection component. The piezoelectric element will be subjected to mechanical stress and generate charges on the surface. Thus, the greater the electrical signal, the greater the vibration amplitude of the milling cutter, which also means that the contact area between the milling cutter and the workpiece is larger. At the same time, the wear state of the milling cutter will also affect the vibration amplitude, and the wear state of the milling cutter can also be judged.

[0024] 2. In the present invention, the nozzle in the cleaning component is controlled by the piezoelectric element. The greater the electrical signal of the piezoelectric element, the greater the threshold value of the nozzle. The greater the electrical signal, it represents that the contact area between the milling cutter and the workpiece is larger, and more waste chips are generated. Thus, the threshold value of the nozzle increases, and the cleaning effect on the waste chips is better. Through the dynamic monitoring of the vibration amplitude, the effective utilization of the coolant is realized.

[0025] 3. In the present invention, the collection bin is used to collect the waste liquid. The waste liquid will finally flow into the secondary cylinder. By controlling the rotation of the secondary cylinder through the second rotating motor, during the rotation of the secondary cylinder, the waste liquid will be driven to rotate, generating centrifugal force. Under the same centrifugal force, the waste chips move faster than the coolant. The waste liquid will move outward, and the coolant will flow out through the filter screen, while the waste chips will move to the edge end of the secondary cylinder. Thus, the separate recovery of the two types of waste materials is realized simultaneously, which is convenient for subsequent processing. Description of the Drawings

[0026] Figure 1 is a schematic structural diagram of the whole of the present invention;

[0027] Figure 2 is a schematic structural diagram of the bed component of the present invention;

[0028] Figure 3 is a schematic structural diagram of the feed component of the present invention;

[0029] Figure 4Schematic structural diagram of the tool assembly of the present invention;

[0030] Figure 5 Schematic structural diagram of the cleaning assembly of the present invention;

[0031] Figure 6 Schematic structural diagram of the detection assembly of the present invention;

[0032] Figure 7 Schematic structural diagram of the collection bin of the present invention;

[0033] Figure 8 Schematic structural diagram of the screening assembly of the present invention.

[0034] In the figure: 1. Bed body assembly; 11. Support pillar; 12. Frame; 13. Connecting plate; 14. Workbench; 2. Tool assembly; 21. Connecting piece; 22. Driving motor; 23. Milling cutter; 3. Cleaning assembly; 31. Housing; 32. Nozzle; 4. Feeding assembly; 41. Moving plate; 42. Vertical plate; 43. Lead screw; 44. Connecting block; 45. First rotating motor; 5. Collection assembly; 51. Collection bin; 52. Main cylinder; 6. Detection assembly; 61. Protective shell; 62. Piezoelectric element; 63. Protective film; 7. Screening assembly; 71. Sub-cylinder; 72. Second rotating motor; 73. Filter screen. Detailed implementation manners

[0035] Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0036] Embodiment: As Figures 1 to 8 shown, a precision milling machine with a self-cleaning function, the precision milling machine includes a bed body assembly 1, a tool assembly 2 and a cleaning assembly 3. A feeding assembly 4 is provided at the upper end of the bed body assembly 1. A tool assembly 2 is provided on one side of the feeding assembly 4. A cleaning assembly 3 is provided at the output end of the tool assembly 2. The cleaning assembly 3 is used to clean the waste chips on the tool. A collection assembly 5 is provided at the bottom end of the bed body assembly 1. The collection assembly 5 is used to collect waste liquid.

[0037] Specifically, the bed body assembly 1 serves as the working part of the device and is used to place the workpiece. The feeding assembly 4 is used to control the movement of the tool assembly 2. The tool assembly 2 is used to process the workpiece. A large amount of waste chips will be generated during the work of the tool assembly 2, so it is necessary to clean the milling cutter 23. Most of them are coolant, which can not only clean the waste chips but also cool the high-speed rotating milling cutter 23. When the coolant is mixed with the waste chips, the coolant cannot be recycled. The collection assembly 5 is used to collect the mixed waste liquid and process it.

[0038] As Figure 3 、 Figure 4As shown in the figure, the tool assembly 2 includes a connecting member 21 and a driving motor 22. The connecting member 21 is sleeved on the driving motor 22. The fixed end of the driving motor 22 is fixedly connected to the connecting member 21. The output end of the driving motor 22 is located at the bottom end. A milling cutter 23 is provided at the output end of the driving motor 22. A cleaning assembly 3 is provided on one side of the driving motor 22.

[0039] Specifically, the connecting member 21 is used to fix the driving motor 22. The driving motor 22 is perpendicular to the horizontal line. The driving motor 22 serves as a power source to control the rotation of the milling cutter 23. The milling cutter 23 is located at the bottom end of the driving motor 22. The milling cutter 23 is snap-connected to the output end of the driving motor 22. The cleaning assembly 3 is used to spray coolant on the milling cutter 23.

[0040] As Figures 3 to 5 shown in the figure, the cleaning assembly 3 includes a housing 31 and a nozzle 32. The housing 31 is located on one side of the driving motor 22. The outer shell of the driving motor 22 is fixedly connected to the housing 31. The nozzle 32 is located inside the housing 31. The nozzle 32 is fixedly connected to the inside of the housing 31. The input end of the nozzle 32 is connected to an external pipeline. A through hole is provided on one side of the housing 31. The through hole is located on the side of the housing 31 close to the milling cutter 23. The output end of the nozzle 32 is communicated with the through hole. A detection assembly 6 is provided inside the housing 31.

[0041] Specifically, the housing 31 is located on one side of the driving motor 22. The housing 31 is fixedly connected to the outer shell of the driving motor 22. The nozzle 32 is located inside the housing 31. The nozzle 32 serves as an output part to transport coolant and spray the coolant onto the milling cutter 23. The housing 31 serves as a protective part to protect the nozzle 32 itself and the connection between the nozzle 32 and the pipeline. A detection assembly 6 is provided at the bottom end of the housing 31. The detection assembly 6 controls the valve opening value of the nozzle 32 through the electrical signal generated by itself, so as to achieve the effective utilization of energy.

[0042] As Figure 5 、 Figure 6 shown in the figure, the detection assembly 6 includes a protective shell 61 and a piezoelectric element 62. The protective shell 61 is located on one side of the housing 31. The protective shell 61 is fixedly connected to the housing 31. The piezoelectric element 62 is provided inside the protective shell 61. A protective film 63 is sleeved outside the piezoelectric element 62.

[0043] Specifically, when the tool assembly 2 processes the workpiece, the milling cutter 23 will vibrate, which then affects the drive motor 22. Since the detection assembly 6 is located on the housing 31, and the housing 31 is fixedly connected to the outer shell of the drive motor 22, it will ultimately affect the piezoelectric element 62 in the detection assembly 6. When the piezoelectric element 62 is subjected to mechanical stress, the charge distribution inside it will change, thereby generating charges on the surface of the material. The amplitude of its mechanical vibration is proportional to the magnitude of the electrical signal. The protective shell 61 is used to protect the internal components and provide mechanical support. The protective film 63 is used to cover the piezoelectric element 62 to prevent the piezoelectric element 62 from being affected by dust, humidity, etc. There is also a damping material in the protective shell 61, which is used to absorb and attenuate high-frequency vibrations and prevent mechanical resonance inside the sensor. The threshold value of the nozzle 32 is controlled by the electrical signal generated by the piezoelectric element 62. The greater the electrical signal, the greater the vibration amplitude of the milling cutter 23, which also means that the contact area between the milling cutter 23 and the workpiece is larger. At the same time, the wear state of the milling cutter 23 can also be judged. The wear state of the milling cutter 23 is inversely proportional to the vibration amplitude.

[0044] As Figure 3 shown, the feeding assembly 4 includes a moving plate 41 and a vertical plate 42. The moving plate 41 is located on one side of the connecting member 21, and the connecting member 21 is fixedly connected to the moving plate 41. There is a vertical plate 42 on one side of the moving plate 41. A lead screw 43 is provided on the vertical plate 42. There is a connecting block 44 on one side of the moving plate 41. The connecting block 44 is located on the side of the moving plate 41 close to the vertical plate 42, and the connecting block 44 is fixedly connected to the moving plate 41. The connecting block 44 is threadedly connected to the lead screw 43. There is a first rotating motor 45 on one side of the vertical plate 42. The fixed end of the first rotating motor 45 is fixedly connected to the vertical plate 42, and the output end of the first rotating motor 45 is fixedly connected to the lead screw 43.

[0045] Specifically, the feeding assembly 4 controls the movement of the tool assembly 2 through multiple driving members. The connecting member 21 is used to fix the first rotating motor 45 on the moving plate 41. The vertical plate 42 serves as a support member and is connected to the bed body assembly 1. The lead screw 43 is parallel to the horizontal line. The first rotating motor 45 serves as a power source to control the rotation of the lead screw 43. The rotation of the lead screw 43 drives the connecting block 44 to move, and the movement of the connecting block 44 drives the moving plate 41 to move. Among them, the first rotating motor 45 and the lead screw 43 are used to provide lateral movement.

[0046] As Figure 1 、 Figure 2 shown, the bed body assembly 1 includes columns 11 and a frame 12. The frame 12 is located at the bottom end of the vertical plate 42. Both ends of the frame 12 are fixedly connected to the bottom end of the vertical plate 42. The middle of the frame 12 is hollow. There are columns 11 at the bottom end of the frame 12, and the columns 11 are fixedly connected to the bottom end of the frame 12. There is a connecting plate 13 inside the frame 12. One end of the connecting plate 13 is fixedly connected to the frame 12, and the other end of the connecting plate 13 is provided with a workbench 14. The connecting plate 13 is fixedly connected to the workbench 14.

[0047] Specifically, the middle of the frame 12 is hollowed out for installing the workbench 14, which also facilitates the flow of waste liquid. The workbench 14 is located in the middle of the frame 12, and there is a space between the workbench 14 and the frame 12. There are four support columns 11, which are located at the four corners of the bottom end of the frame 12. The connecting plate 13 is located at the bottom end of the frame 12. The connecting plate 13 serves as a connecting member 21 for connecting the frame 12 and the workbench 14. Both the frame 12 and the workbench 14 are parallel to the horizontal line.

[0048] As Figure 7 、 Figure 8 shown, the collection assembly 5 includes a collection bin 51 and a main cylinder 52. The collection bin 51 is located at the bottom end of the frame 12 and is fixedly connected to the frame 12. A main cylinder 52 is provided at the bottom end of the collection bin 51, and the main cylinder 52 is communicated with the collection bin 51.

[0049] Specifically, the collection assembly 5 is used to collect the waste liquid generated during processing. The collection bin 51 is located at the bottom end of the frame 12 and is fixedly connected to the bottom end of the frame 12. An output end is opened at the bottom end of the collection bin 51. The waste liquid accumulates on the workbench 14, then flows to the edge end of the workbench 14, then falls into the collection bin 51, and finally flows to the output end. The top end of the main cylinder 52 is connected to the output end of the collection bin 51.

[0050] As Figure 8 shown, the screening assembly 7 includes a secondary cylinder 71 and a second rotating motor 72. The secondary cylinder 71 is located inside the main cylinder 52, and the secondary cylinder 71 is rotatably connected to the main cylinder 52. A second rotating motor 72 is provided at the bottom end of the main cylinder 52. The fixed end of the second rotating motor 72 is fixedly connected to the main cylinder 52, and the output end of the second rotating motor 72 is fixedly connected to the secondary cylinder 71. A filter screen 73 is provided on the barrel wall of the secondary cylinder 71.

[0051] Specifically, when the waste liquid accumulates in the main cylinder 52, the screening assembly 7 is used to separate the waste chips and the coolant in the waste liquid. The waste liquid mainly flows into the secondary cylinder 71. A filter plate is provided on the barrel wall of the secondary cylinder 71, and the filter plate is used to allow the coolant to flow. The second rotating motor 72 is located at the bottom end of the main cylinder 52, and the output end of the second rotating motor 72 is fixedly connected to the bottom end of the secondary cylinder 71. The second rotating motor 72 serves as a power source to control the rotation of the secondary cylinder 71. Thus, during the rotation of the secondary cylinder 71, the waste liquid will be driven to rotate, generating a centrifugal force. Under the same centrifugal force, the displacement is proportional to the mass, and the waste chips move faster than the coolant. The waste liquid will move outward, and the coolant will flow out through the filter screen 73, and the waste chips will move to the edge end of the secondary cylinder 71. Two output ends are opened at the bottom end of the main cylinder 52, which are respectively used to collect the coolant and the waste chips.

[0052] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A fine milling machine with a self-cleaning function, characterized in that: The fine milling machine comprises a bed assembly (1), a tool assembly (2) and a cleaning assembly (3); a feed assembly (4) is provided at the upper end of the bed assembly (1); a tool assembly (2) is provided on one side of the feed assembly (4); a cleaning assembly (3) is provided at the output end of the tool assembly (2); the cleaning assembly (3) is used to clean waste chips on the tool; a collecting assembly (5) is provided at the bottom end of the bed assembly (1); the collecting assembly (5) is used to collect waste liquid.

2. A finishing milling machine with self-cleaning function according to claim 1, characterized in that: The tool assembly (2) comprises a connecting piece (21) and a driving motor (22); the connecting piece (21) is sleeved on the driving motor (22); a fixed end of the driving motor (22) is fixedly connected to the connecting piece (21); an output end of the driving motor (22) is located at a bottom end; a milling cutter (23) is provided at the output end of the driving motor (22); and a cleaning assembly (3) is provided on one side of the driving motor (22).

3. The fine milling machine with self-cleaning function according to claim 2, characterized in that: The cleaning component (3) comprises a shell (31) and a nozzle (32); the shell (31) is located on one side of the driving motor (22); the outer shell of the driving motor (22) is fixedly connected to the shell (31); the nozzle (32) is located inside the shell (31); the nozzle (32) is fixedly connected to the inside of the shell (31); the input end of the nozzle (32) is connected to an external pipeline; a through hole is opened on one side of the shell (31); the through hole is located on a side of the shell (31) close to the milling cutter (23); the output end of the nozzle (32) is connected to the through hole; and a detection component (6) is provided inside the shell (31).

4. The fine milling machine with self-cleaning function according to claim 3, characterized in that: The detection component (6) comprises a protective shell (61) and a piezoelectric element (62); the protective shell (61) is located on one side of the housing (31); the protective shell (61) is fixedly connected to the housing (31); the piezoelectric element (62) is arranged in the protective shell (61); and the piezoelectric element (62) is covered with a protective film (63).

5. The fine milling machine with self-cleaning function according to claim 4, characterized in that: The feeding assembly (4) comprises a movable plate (41) and a vertical plate (42), wherein the movable plate (41) is located at one side of the connecting member (21), the connecting member (21) is fixedly connected to the movable plate (41), a vertical plate (42) is provided at one side of the movable plate (41), a screw rod (43) is provided on the vertical plate (42), a connecting block (44) is provided at one side of the movable plate (41), the connecting block (44) is located at a side of the movable plate (41) close to the vertical plate (42), the connecting block (44) is fixedly connected to the movable plate (41), the connecting block (44) is threadedly connected to the screw rod (43), a first rotating motor (45) is provided at one side of the vertical plate (42), a fixed end of the first rotating motor (45) is fixedly connected to the vertical plate (42), and an output end of the first rotating motor (45) is fixedly connected to the screw rod (43).

6. A finishing milling machine with self-cleaning function according to claim 5, characterized in that: The bed assembly (1) comprises a support (11) and a frame (12); the frame (12) is located at the bottom of the vertical plate (42); the two ends of the frame (12) are fixedly connected to the bottom of the vertical plate (42); the middle of the frame (12) is hollow; the bottom of the frame (12) is provided with a support (11); the support (11) is fixedly connected to the bottom of the frame (12); a connecting plate (13) is provided inside the frame (12); one end of the connecting plate (13) is fixedly connected to the frame (12); the other end of the connecting plate (13) is provided with a workbench (14); the connecting plate (13) is fixedly connected to the workbench (14).

7. A finishing milling machine with self-cleaning function according to claim 6, characterized in that: The collecting assembly (5) comprises a collecting bin (51) and a main cylinder (52); the collecting bin (51) is located at the bottom end of the frame (12); the collecting bin (51) is fixedly connected to the frame (12); the main cylinder (52) is provided at the bottom end of the collecting bin (51); and the main cylinder (52) is communicated with the collecting bin (51).

8. The fine milling machine with self-cleaning function according to claim 7, characterized in that: The screening assembly (7) comprises a secondary cylinder (71) and a second rotating motor (72); the secondary cylinder (71) is located inside the main cylinder (52); the secondary cylinder (71) is rotationally connected to the main cylinder (52); the second rotating motor (72) is disposed at the bottom end of the main cylinder (52); the fixed end of the second rotating motor (72) is fixedly connected to the main cylinder (52); the output end of the second rotating motor (72) is fixedly connected to the secondary cylinder (71); and a filter screen (73) is disposed on the cylinder wall of the secondary cylinder (71).

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