A CNC machine tool

Abstract

The application relates to the technical field of processing equipment, and provides a CNC (numerical control) lathe, which comprises a shell, an operation table and a cooling pipe, the operation table is arranged in the shell, the cooling pipe is arranged in the shell and is used for spraying cutting fluid towards a machining tool, and the CNC lathe further comprises: a flushing assembly arranged in the shell, the flushing assembly is used for flushing a table top of the operation table; a surrounding frame, the surrounding frame is sleeved outside the operation table, an inner wall of the surrounding frame is in sealing abutment with the outside of the operation table, the surrounding frame slides along a height direction, when the surrounding frame slides to an upper end higher than an upper surface of the operation table, the surrounding frame and the upper surface of the operation table form a water accumulation groove; and a drain pipe, one end of the drain pipe is connected with the surrounding frame and is in communication with the bottom of the water accumulation groove. Based on the above, the operation table can be conveniently cleaned, the water used for cleaning is mixed with the cutting fluid, the influence of the water used for cleaning on the concentration of the cutting fluid is reduced, and the effect is achieved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of processing equipment, in particular to a CNC (numerical control) machine tool. BACKGROUND

[0002] At present, when parts or other accessories of a bicycle are processed, a CNC machining center needs to be used. The CNC machining center is a precision machining equipment controlled by a computer, and is an automatic machining equipment developed on the basis of a general milling machine. The main work of the CNC machining is to compile a machining program and automatically control a machining route.

[0003] The existing CNC machining center with a table self-cleaning function disclosed in Chinese Patent No. CN219485061U comprises a numerical control milling machine, a cleaning assembly and a high-pressure water pipe. An operating table is arranged at the bottom of the numerical control milling machine. A controller is arranged on the front side of the numerical control milling machine. The cleaning assembly is arranged in the numerical control milling machine. A sliding rod is arranged in the cleaning assembly. A movable frame is movably arranged on the outer side of the sliding rod. A rubber scraper is arranged at the bottom of the movable frame. The high-pressure water pipe is fixedly arranged at the bottom of the movable frame. High-pressure nozzles are equidistantly arranged at the bottom of the high-pressure water pipe. Through the arrangement of the cleaning assembly, the operating table can be cleaned after processing. The high-pressure water pipe is connected to an external high-pressure water source. The high-pressure water liquid is sprayed through the high-pressure nozzles to wash the waste chips on the surface of the operating table. At this time, the electric push rod operates to drive the movable frame to move. The rubber scraper can scrape the waste chips and water stains left on the surface of the operating table to realize automatic cleaning.

[0004] According to the related technology in the above, the workpiece to be processed is fixed on the upper surface of the operating table. A closed shell is arranged on the outer side of the milling machine. A door plate is arranged on the shell to facilitate the opening of the shell. During the machining process of the lathe, cutting fluid is mostly used to cool and lubricate the tool. The cutting fluid is prepared by mixing a certain amount of water and reagents. The cutting fluid mostly flows to the bottom of the shell and is then collected and recycled.

[0005] When the operating table is washed with high-pressure water liquid, the washing water also flows to the bottom of the shell and then mixes with the cutting fluid, which greatly reduces the concentration of the cutting fluid during the recycling process, thereby affecting the normal effect of the cutting fluid. SUMMARY

[0006] In order to facilitate the cleaning of the operating table and reduce the mixing of the washing water and the cutting fluid and the influence of the washing water on the concentration of the cutting fluid, the application provides a CNC machine tool.

[0007] The CNC machine tool provided by the application adopts the following technical scheme:

[0008] A CNC machine tool comprises a housing, an operation table arranged in the housing, and a cooling pipe arranged in the housing and used for spraying cutting fluid towards a machining tool, further comprising a flushing assembly arranged in the housing and used for flushing a table top of the operation table, a surrounding frame sleeved outside the operation table, an inner wall of the surrounding frame sealingly abutting against an outer side of the operation table, the surrounding frame sliding along a height direction, when the surrounding frame slides to an upper end higher than an upper surface of the operation table, the surrounding frame and the upper surface of the operation table form a water collecting groove, and a drain pipe having one end connected with the surrounding frame and communicating with a bottom of the water collecting groove, when the surrounding frame slides to the upper end lower than the upper surface of the operation table, a side wall of the operation table blocks an end of the drain pipe.

[0009] By adopting the above technical scheme, when the lathe is machining, the surrounding frame is moved to a position where the upper end is lower than the upper surface of the operation table, at this time, the periphery of the upper surface of the operation table is open, therefore the cutting fluid sprayed by the cooling pipe towards the machining tool will drop onto the operation table and then flow from the upper surface of the operation table to the bottom of the housing for collection, when the machining is completed, the surrounding frame is moved upward when the operation table is flushed by the flushing assembly, at this time, the periphery of the operation table is sealed by the surrounding frame, and the surrounding frame surrounds the periphery of the operation table to form a water collecting groove, therefore the water flushed by the flushing assembly will accumulate in the water collecting groove and be discharged from the drain pipe alone, without flowing to the bottom of the housing to mix with the cutting fluid, so that the operation table is conveniently cleaned, the water for cleaning is prevented from mixing with the cutting fluid, and the influence of the water for cleaning on the concentration of the cutting fluid is reduced.

[0010] Preferably, a driving member is arranged in the housing and used for driving the surrounding frame to slide along the height direction for adjustment.

[0011] By adopting the above technical scheme, the surrounding frame is automatically driven to slide along the height direction for adjustment by the driving member.

[0012] Preferably, the surrounding frame comprises a ring-shaped hard portion and a ring-shaped elastic portion, the elastic portion is fixed to an inner wall of the hard portion, and an inner wall of the elastic portion elastically abuts against an outer side wall of the operation table.

[0013] By adopting the above technical scheme, when the surrounding frame is sleeved outside the operation table, the elastic portion can elastically abut against the outer side of the operation table, so as to realize the sealing abutment between the surrounding frame and the outer side wall of the operation table and reduce the seepage of water in the water collecting groove from the gap between the surrounding frame and the outer side of the operation table.

[0014] Preferably, the flushing assembly comprises a movable frame, a water spraying pipe, a nozzle and an air pipe, the movable frame is adjusted by sliding along the horizontal direction, the water spraying pipe and the air pipe are arranged on the movable frame, the air pipe is used for blowing air towards the upper surface of the operation table, the nozzle is arranged on the water spraying pipe, and the sliding paths of the water spraying pipe and the air pipe pass above the operation table.

[0015] By adopting the above technical scheme, when the flushing assembly is used to flush the operation table, the movable frame first drives the air pipe to move and blow air to the upper surface of the operation table, at this time, the air blowing pipe can blow away the residual cutting fluid from the surface of the operation table, thereby reducing the waste of cutting fluid caused by flushing away the cutting fluid together with the flushing assembly; then the water spraying pipe is used to flush the upper surface of the operation table; and after flushing, the air blowing pipe is used to blow air after the water spraying pipe is turned off, so as to better dry or drain away the water, thereby reducing the mixing of subsequent cutting fluid and water.

[0016] Preferably, a filter screen is vertically arranged on the edge of the upper surface of the operation table, the filter screen is located on one side of the moving path of the end of the drain pipe, and when the drain pipe is in communication with the water collecting groove, the filter screen is located at the position where the drain pipe is in communication with the water collecting groove.

[0017] By adopting the above technical scheme, since there are many cuttings and sundries during machining, the sundries are easy to enter the drain pipe and cause blockage, and even increase the difficulty of water treatment of the drain pipe; the filter screen can filter the sundries, thereby reducing the entry of the sundries into the drain pipe.

[0018] Preferably, a brush rod is arranged on the movable frame, and first bristles are arranged on the brush rod; when the movable frame reciprocatingly slides, the first bristles sweep the filter screen.

[0019] By adopting the above technical scheme, since the materials and machining processes of machined parts are different, the sundries are also different in size, and thus the sundries are easy to block the filter screen; by arranging the brush rod, when the movable frame drives the brush rod to move and pass through the filter screen, the first bristles can clean the side of the filter screen facing the operation table, thereby reducing the blockage of the filter screen.

[0020] Preferably, a brush plate is arranged on the upper end of the surrounding frame, the brush plate is located above the position where the drain pipe is connected with the surrounding frame, and second bristles are arranged on the side of the brush plate facing the surrounding frame; when the surrounding frame moves up and down, the second bristles sweep the filter screen.

[0021] By adopting the above technical scheme, when the surrounding frame moves up and down and passes through the filter screen, the second bristles on the brush plate can clean the other side of the filter screen away from the operation table, thereby further improving the cleaning effect of the filter screen.

[0022] Preferably, the lower end of the filter screen is rotationally connected to the operating table, and the rotation axis of the filter screen is arranged along the length direction of the edge of the operating table close to the operating table, and the rotation range of the filter screen is from the vertical direction to the horizontal direction away from the operating table; when the frame and the brush plate move to the upper end below the upper surface of the operating table, the filter screen rotates to the horizontal position flush with the upper surface of the operating table; when the frame moves upward, the upper end of the brush plate gradually lifts the filter screen upward and rotates to the vertical position.

[0023] By adopting the above technical scheme, the rotating filter screen is arranged, when the frame rotates upward, the upper end of the brush plate can gradually lift the filter screen upward to the vertical state; when the brush plate hits the filter screen, the filter screen can vibrate, so that the debris on the filter screen can be shaken off; and when the operating table is processed or operated, the filter screen can be rotated to the horizontal position, reducing the influence of the vertical filter screen on product installation or tool movement.

[0024] Preferably, the upper end of the brush plate is provided with a first magnetic attraction element, and the upper end of the filter screen is provided with a second magnetic attraction element, when the frame moves downward to the upper end below the upper surface of the operating table, the attraction force between the first magnetic attraction element and the second magnetic attraction element drives the filter screen to rotate downward to the horizontal position.

[0025] By adopting the above technical scheme, when the brush plate moves downward to the upper end below the upper surface of the operating table, the attraction force between the second magnetic attraction element and the first magnetic attraction element can drive the filter screen in the vertical state to rotate downward to the horizontal position, ensuring that the filter screen can be rotated to the horizontal position when the frame does not form the water accumulation groove.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] (1) By arranging the cooperation between the flushing assembly, the frame and the drain pipe, the frame can be moved downward when processing, so that the side of the operating table is open, at this time the cutting fluid flows into the bottom of the housing for collection and circulation; and when the operating table is washed, the frame is moved upward, and a water accumulation groove is formed on the operating table, so that the washing water is discharged separately from the drain pipe, thereby achieving the effect of facilitating the cleaning of the operating table, reducing the mixing of the washing water and the cutting fluid, and reducing the influence of the washing water on the concentration of the cutting fluid;

[0028] (2) By arranging the filter screen, the debris entering the drain pipe can be reduced; by arranging the cooperation between the brush rod and the first brush, the side of the filter screen facing the operating table can be cleaned; by arranging the cooperation between the brush plate and the second brush, the other side of the filter screen away from the operating table can be cleaned, reducing the blockage of the filter screen; by arranging the rotating filter screen, the frame can hit the filter screen when moving up and down, further shaking off the debris on the surface of the filter screen;

[0029] (3) By setting the flushing assembly including the air pipe and the water spraying pipe, so that the cutting fluid on the operation table surface can be more fully blown to the bottom of the shell before cleaning; and after tilting the operation table, the water on the operation table surface can be more fully blown dry or drained from the drain pipe by closing the water spraying pipe, thereby reducing the mixing of the cleaning water into the cutting fluid. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a structural schematic diagram of the CNC lathe of the embodiment;

[0031] Figure 2 is a structural schematic diagram when the enclosure of the embodiment moves upward to form a water accumulation groove;

[0032] Figure 3 is a structural schematic diagram when the enclosure of the embodiment moves downward;

[0033] Figure 4 is Figure 3 is an enlarged view of part A in FIG. 4;

[0034] Figure 5 is a structural schematic diagram after the enclosure of the embodiment is hidden.

[0035] Reference signs: 1, shell; 2, cooling pipe; 3, operation table; 4, enclosure; 41, hard part; 42, elastic part; 5, flushing assembly; 51, movable frame; 52, water spraying pipe; 53, spray head; 54, air pipe; 6, drain pipe; 7, door plate; 8, machining head; 9, water accumulation groove; 10, driving member; 11, power member; 12, filter screen; 13, brush rod; 14, first brush; 15, brush plate; 16, second brush; 17, notch; 18, first magnetic attraction member; 19, second magnetic attraction member. DETAILED DESCRIPTION

[0036] The following will be described in detail in combination with the accompanying drawings. Figures 1-5 The present application will be further described in detail.

[0037] The embodiment of the present application discloses a CNC machine tool. Referring to Figure 1 , the CNC lathe comprises a shell 1, a cooling pipe 2, an operation table 3, an enclosure 4, a flushing assembly 5, and a drain pipe 6.

[0038] The shell 1 is in a square shape with an internal cavity. A door plate 7 is slidably installed on a vertical wide side of the shell 1. The door plate 7 slides along the horizontal length direction of the shell 1 and is used to open the shell 1. The operation table 3 is installed in the shell 1 and is in a rectangular block shape. The upper end of the operation table 3 is in a planar shape. The upper end surface of the operation table 3 can be installed with a clamp. The clamp is used to fix the processed accessories or products.

[0039] A machining head 8 is movably installed in the housing 1, and a tool is installed on the machining head 8 for machining a fitting or a product. The cooling pipe 2 is installed on one side of the machining head 8, and the cooling pipe 2 is provided with at least one pipe for conveying cutting fluid. The cooling pipe 2 is selected as a universal joint pipe, so as to facilitate adjustment of the direction of cutting fluid sprayed by the cooling pipe 2, so as to better spray the cutting fluid to the tool.

[0040] With reference to Figure 2 and Figure 3 , the flushing assembly 5 is arranged in the housing 1, and the flushing assembly 5 is used for flushing the table surface of the operation table 3. The surrounding frame 4 is a rectangular ring, the surrounding frame 4 is sleeved outside the operation table 3, the inner wall of the surrounding frame 4 is in sealing abutment with the outer side of the operation table 3, and the surrounding frame 4 slides along the height direction; when the surrounding frame 4 slides to the upper end higher than the upper surface of the operation table 3, the part of the surrounding frame 4 protruding above the upper surface of the operation table 3 is in close contact with the table surface of the operation table 3 to form a closed water collecting groove 9, and the water collecting groove 9 can collect and discharge the cleaning water.

[0041] The drain pipe 6 is a flexible pipe, one end of the drain pipe 6 is connected with the surrounding frame 4 and is in communication with the bottom of the water collecting groove 9. When the surrounding frame 4 slides downward to the upper end lower than the upper surface of the operation table 3, the side wall of the operation table 3 blocks the end of the drain pipe 6, and at this time the upper surface of the operation table 3 is open. Therefore, during the machining process, the surrounding frame 4 can be slid downward to the upper end lower than the upper surface of the operation table 3, and at this time the cutting fluid sprayed by the cooling pipe 2 will continue to flow downward from the upper surface of the operation table 3 and the outer side of the surrounding frame 4 into the housing 1 to collect and recycle the cutting fluid.

[0042] A driving member 10 is arranged in the housing 1, and the driving member 10 is used to drive the surrounding frame 4 to slide along the height direction for adjustment. Specifically, the driving member 10 is selected as a gas cylinder, and the gas cylinder is arranged with two members and is vertically installed on the opposite sides of the operation table 3. The end of the telescopic rod of the gas cylinder is fixed with the surrounding frame 4.

[0043] The surrounding frame 4 includes a ring-shaped hard part 41 and a ring-shaped elastic part 42. The hard part 41 and the elastic part 42 are both square rings. The elastic part 42 is made of rubber material, and is adhesively fixed to the inner wall of the hard part 41. The inner wall of the elastic part 42 is in elastic abutment with the outer side wall of the operation table 3, so as to realize the sealing abutment between the surrounding frame 4 and the outer side of the operation table 3.

[0044] Among them, the field illumination Figure 2 and Figure 4The rinsing assembly 5 includes a movable frame 51, a water spray pipe 52, a nozzle 53, and an air pipe 54. The movable frame 51 is slidably connected to the housing 1 in a horizontal direction, and the sliding direction of the movable frame 51 is consistent with the sliding direction of the door panel 7. The water spray pipe 52 and the air pipe 54 are both horizontally fixed to the movable frame 51, and the arrangement direction of the water spray pipe 52 and the air pipe 54 on the movable frame 51 is perpendicular to the sliding direction of the movable frame 51. The movable frame 51 is positioned higher than the upper surface of the operating table 3, and the sliding path of the water spray pipe 52 and the air pipe 54 passes directly above the operating table 3. One end of the air pipe 54 is connected to an air source, and several air holes are opened on the side of the air pipe 54 facing the operating table 3. The air pipe 54 is used to blow air onto the upper surface of the operating table 3. Several nozzles 53 are provided and installed at intervals on the water spray pipe 52. One end of the water spray pipe 52 is connected to a water source, and the nozzles 53 are used to spray water onto the upper surface of the operating table 3 for cleaning. A power component 11 is provided inside the housing 1 to drive the movable frame 51 to slide horizontally. The power component 11 is a horizontally installed cylinder. The telescopic rod of the cylinder is fixed to the movable frame 51. When the telescopic rod moves in and out, it can drive the washing assembly 5 to move horizontally back and forth.

[0045] During machining, the movable frame 51 can move the air pipe 54 and water spray pipe 52 away from directly above the operating table 3. When the upper surface of the operating table 3 needs to be cleaned after machining, the power component 11 can move the movable frame 51 over the upper surface of the operating table 3. Moreover, air can be blown onto the upper surface of the operating table 3 through the air pipe 54 to blow away the cutting fluid remaining on the upper surface of the operating table 3 to the bottom of the housing 1 for collection, reducing the cutting fluid from being washed away. Then, the frame 4 is moved upward, and water is sprayed onto the surface of the operating table 3 through the cooperation of the water spray pipe 52 and the nozzle 53. At this time, since the perimeter of the upper surface of the operating table 3 is sealed and enclosed by the frame 4 to form a water collection tank 9, the water collection tank 9 can collect the cleaning water and drain it separately through the drain pipe 6, instead of flowing to the bottom of the housing 1 and mixing with the cutting fluid, thus reducing the impact of the cleaning water on the concentration of the cutting fluid.

[0046] In some embodiments, a filter screen 12 is vertically arranged on the upper edge of the operating table 3. The filter screen 12 is located on one side of the vertical movement path at the end of the drain pipe 6. When the drain pipe 6 is connected to the water collection tank 9, the filter screen 12 is located at the position where the drain pipe 6 is connected to the water collection tank 9. Therefore, the filter screen 12 can filter out some of the debris and impurities generated during processing, reduce the blockage of the drain pipe 6 by impurities, and reduce the discharge of impurities from the drain pipe 6.

[0047] In some embodiments, the movable frame 51 is fixed with a brush rod 13, which is vertically arranged on the movable lower surface and has its lower end close to the upper surface of the operation table 3. The first brush 14 is fixed on the side of the brush rod 13 and is made of flexible material. Since various sizes of debris are generated during processing, the filter screen 12 is easily blocked. When the movable frame 51 reciprocally slides, the first brush 14 can sweep the filter screen 12, thereby scraping the side of the filter screen 12 facing the operation table 3 and scraping away some of the debris blocked on the filter screen 12.

[0048] In some embodiments, the upper end of the surrounding frame 4 is fixed with a brush plate 15, which is fixedly connected with the hard part 41 and located in the same plane as one side of the hard part 41. The brush plate 15 is located above the position where the drain pipe 6 is connected with the surrounding frame 4. The side of the brush plate 15 facing the surrounding frame 4 is fixed with the second brush 16 made of flexible material. When the surrounding frame 4 moves up and down and the brush plate 15 passes the filter screen 12, the second brush 16 scrapes the filter screen 12, thereby cleaning the other side of the filter screen 12 away from the operation table 3 and further reducing the debris blocked on the filter screen 12.

[0049] In some embodiments, referring to Figure 4 and Figure 5 , the lower end of the filter screen 12 is rotationally connected with the operation table 3. The edge of the operation table 3 is provided with a notch 17, and the rotating shaft of the filter screen 12 is embedded in the notch 17. The rotating axis of the filter screen 12 is arranged along the length direction of the edge of the operation table 3 close to the filter screen 12. The rotating range of the filter screen 12 is from the vertical direction to the horizontal direction away from the operation table 3. When the surrounding frame 4 and the brush plate 15 move to the upper end below the upper surface of the operation table 3, the filter screen 12 can rotate to the horizontal position flush with the upper surface of the operation table 3 due to the notch 17. When the surrounding frame 4 moves up, the upper end of the brush plate 15 gradually lifts and rotates the filter screen 12 to the vertical position. At this time, the filter screen 12 can cover the end of the drain pipe 6 connected with the water collecting groove 9, thereby ensuring the normal filtering effect of the filter screen 12. When the brush plate 15 hits the filter screen 12, the filter screen 12 can vibrate, thereby further shaking off the debris on the filter screen 12. When the surrounding frame 4 moves down, the filter screen 12 can rotate to the horizontal position during the processing operation on the operation table 3, thereby reducing the impact of the vertical filter screen 12 on the product installation or the cutter movement.

[0050] Referring to Figure 2 and Figure 4The upper end of the brush plate 15 is fixed with a first magnetic member 18, and the upper end of the filter screen 12 is fixed with a second magnetic member 19, and the first magnetic member 18 and the second magnetic member 19 are both selected as magnets; when the frame 4 and the brush plate 15 are moved downward to be below the upper surface of the operation table 3, the attraction between the first magnetic member 18 and the second magnetic member 19 can drive the filter screen 12 to rotate downward to a horizontal position, so that the filter screen 12 does not always stay in a vertical state when the frame 4 moves downward.

[0051] The implementation principle of the CNC machine tool is that when the numerical control lathe is working, the cooling pipe 2 sprays cutting fluid to the tool; at this time, the frame 4 can be moved downward to a position below the upper surface of the operation table 3 by the driving member 10, so that the periphery of the operation table 3 is completely open, and the cutting fluid can flow along the periphery of the operation table 3 to the bottom of the shell 1 for collection and recycling; when the machining is completed and the upper surface of the operation table 3 needs to be washed, the frame 4 can be moved upward by the driving member 10, at this time, the periphery of the operation table 3 is sealed by the frame 4, and the frame 4 surrounds the water accumulation groove 9 around the periphery of the operation table 3, so that the water washed by the washing assembly 5 accumulates in the water accumulation groove 9 and is discharged from the drain pipe 6 alone, and will not flow to the bottom of the shell 1 and mix with the cutting fluid, so that the operation table 3 can be conveniently washed, and the mixing of the washing water and the cutting fluid is reduced, and the influence of the washing water on the concentration of the cutting fluid is reduced.

[0052] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, therefore: any equivalent changes made on the basis of the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A CNC machine tool, comprising a housing (1), an operating table (3), and a cooling pipe (2), wherein the operating table (3) is disposed within the housing (1), and the cooling pipe (2) is disposed within the housing (1) and is used to spray cutting fluid toward a machining tool, characterized in that, Also includes: A rinsing assembly (5) is disposed inside the housing (1) and is used to rinse the surface of the operating table (3). The frame (4) is fitted on the outside of the operating table (3). The inner wall of the frame (4) is sealed and abutted against the outside of the operating table (3). The frame (4) slides along the height direction. When the frame (4) slides to the point where its upper end is higher than the upper surface of the operating table (3), the frame (4) and the upper surface of the operating table (3) enclose each other to form a water trough (9). Drainage pipe (6), one end of which is connected to the frame (4) and communicates with the bottom of the water collection tank (9); when the frame (4) slides to a position where its upper end is lower than the upper surface of the operating table (3), the side wall of the operating table (3) blocks the end of the drainage pipe (6); A filter screen (12) is vertically installed on the upper edge of the operating table (3). A brush plate (15) is installed at the upper end of the frame (4). The brush plate (15) is located above the connection between the drain pipe (6) and the frame (4). The side of the brush plate (15) facing the inside of the frame (4) is provided with second bristles (16). When the frame (4) moves up and down, the second bristles (16) sweep across the filter screen (12). The lower end of the filter screen (12) is rotatably connected to the operating table (3). A notch (17) is provided at the edge of the operating table (3). The rotating shaft of the filter screen (12) is embedded in the notch (17). The rotating axis of the filter screen (12) is set along the length of the edge of the operating table (3) it is close to. When the filter screen (12) is in a horizontal state, the filter screen (12) faces away from the operating table (3). When the frame (4) and the brush plate (15) move to a position where the upper end is lower than the upper surface of the operating table (3), the filter screen (12) rotates to a horizontal position that is flush with the upper surface of the operating table (3). When the frame (4) moves upward, the upper end of the brush plate (15) gradually lifts the filter screen (12) upward and rotates it to a vertical position.

2. The CNC machine tool according to claim 1, characterized in that, The housing (1) is provided with a drive component (10), which is used to drive the frame (4) to slide and adjust along the height direction.

3. A CNC machine tool according to claim 1, characterized in that, The frame (4) includes an annular rigid part (41) and an annular elastic part (42). The elastic part (42) is fixed to the inner wall of the rigid part (41), and the inner wall of the elastic part (42) elastically abuts against the outer wall of the operating table (3).

4. A CNC machine tool according to claim 1, characterized in that, The rinsing assembly (5) includes a movable frame (51), a water spray pipe (52), a nozzle (53), and an air pipe (54). The movable frame (51) is slidable and adjustable in the horizontal direction. The water spray pipe (52) and the air pipe (54) are disposed on the movable frame (51). The air pipe (54) is used to blow air toward the upper surface of the operating table (3). The nozzle (53) is disposed on the water spray pipe (52). The sliding path of the water spray pipe (52) and the air pipe (54) passes directly above the operating table (3).

5. A CNC machine tool according to claim 4, characterized in that, The filter screen (12) is located on one side of the moving path of the end of the drain pipe (6). When the drain pipe (6) is connected to the water collection tank (9), the filter screen (12) is located at the position where the drain pipe (6) and the water collection tank (9) are connected.

6. A CNC machine tool according to claim 5, characterized in that, The movable frame (51) is provided with a brush rod (13), and the brush rod (13) is provided with first brush bristles (14); when the movable frame (51) slides back and forth, the first brush bristles (14) sweep across the filter screen (12).

7. A CNC machine tool according to claim 1, characterized in that, The brush plate (15) is provided with a first magnetic suction member (18) at its upper end, and the filter screen (12) is provided with a second magnetic suction member (19) at its upper end. When the frame (4) moves downward to a position where its upper end is lower than the upper surface of the operating table (3), the suction force of the first magnetic suction member (18) on the second magnetic suction member (19) drives the filter screen (12) to rotate downward to a horizontal position.

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