Positioning machining equipment for precision machine parts
By designing a precision mechanical accessories positioning and processing equipment for multi-angle positioning and stable components, the problem of single positioning direction and poor positioning accuracy in the prior art is solved, and the effect of multi-angle automatic processing and efficient debris cleaning is achieved, and the practicality and processing accuracy of the equipment are improved.
Patent Information
- Application Number
- CN202421491224.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-06-27
AI Technical Summary
During the use of existing positioning and processing equipment, in most cases, a single fixture is used to clamp and position the circular workpieces of different diameters on both sides, and the workpiece cannot be positioned from multiple angles, resulting in poor positioning accuracy and reducing positioning accuracy and equipment practicality.
A positioning and processing equipment for precision mechanical accessories is designed, and multi-angle automatic processing is achieved through the cooperation of the moving mechanism, lifting mechanism and milling tooth mechanism. The equipment drives the transmission screw through a motor, so that the threaded sleeve drives the T-frame and the positioning block to the bottom of the workpiece, and realizes multi-angle positioning on the lower side and left and right sides of the workpiece through the positioning assembly.
Through the multi-angle positioning and stable assembly coordination, the positioning accuracy and machining accuracy of the workpiece are improved, the practicality of the equipment is enhanced, and efficient cleaning and collection of debris is achieved through the design of negative pressure fan blades and cleaning brushes.
Smart Images
Figure CN222945039U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mechanical parts processing, in particular to a positioning processing device for precision mechanical parts. Background Art
[0002] Precision mechanical parts refer to mechanical parts that require high-precision processing. They are widely used in aerospace, automobile manufacturing, medical equipment and other fields, requiring strict tolerances, complex geometric shapes and high-quality surface finish. In order to ensure the accuracy and efficiency of these parts during the processing, the use of positioning processing equipment is crucial. These devices achieve precise positioning and efficient processing through high-precision positioning systems and automated control, which can ensure processing accuracy, improve production efficiency, reduce production costs, and ensure product consistency. Common positioning processing equipment includes CNC machine tools, coordinate measuring machines, laser processing equipment, EDM machines and multi-axis machining centers, etc. They maintain consistent high precision and quality in mass production and can complete the processing of complex shapes.
[0003] In most cases, existing positioning and processing equipment uses a single clamp to clamp and position circular workpieces of different diameters on both sides during use. However, positioning and processing the workpiece only by the clamping blocks on both sides is still unable to position the pipe up and down, which will lead to poor positioning accuracy of the workpiece, thereby reducing the positioning accuracy and practicality of the equipment. Therefore, a positioning and processing equipment for precision mechanical parts is proposed to solve the above problems. Utility Model Content
[0004] In order to make up for the above shortcomings, the utility model provides a positioning and processing equipment for precision mechanical parts, aiming to improve the problem in the prior art that the positioning direction of the workpiece is relatively single and the workpiece cannot be positioned at multiple angles, resulting in a decrease in the practicality of the equipment.
[0005] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a positioning and processing equipment for precision mechanical accessories, comprising a workbench, a bracket fixedly connected to the upper surface of the workbench, a moving mechanism installed on the lower surface of the bracket, a lifting mechanism installed on the lower surface of the moving mechanism, a milling mechanism installed on the output end of the lifting mechanism, a motor 1 fixedly connected to the middle of the inner wall of the workbench, a transmission screw fixedly connected to the output end of the motor 1, a threaded sleeve threadedly connected to the outer wall of the transmission screw, a connecting plate fixedly connected to the outer wall of the threaded sleeve, a T-shaped frame fixedly connected to the upper surface of the threaded sleeve, a positioning block fixedly connected to the upper surface of the T-shaped frame, a positioning component for positioning a workpiece installed on the outer wall of the T-shaped frame, a transmission component for driving the stabilizing component to lift and lower installed on one side of the inner wall of the workbench, and a stabilizing component for stabilizing the workpiece installed inside the workbench.
[0006] Furthermore, the positioning assembly includes a connecting rod 1, which is rotatably connected to one side of the outer wall of the T-shaped frame, the outer wall of the connecting rod 1 is rotatably connected to a positioning clamp arm, the inner wall of the positioning clamp arm is rotatably connected to a connecting rod 2, and one side of the connecting rod 2 is rotatably connected to the inside of the workbench.
[0007] Furthermore, the transmission assembly includes a rack column 1, which is slidably connected to one side of the inside of the workbench, the upper surface of the rack column 1 is fixedly connected to the lower surface of the connecting plate, the upper surface of the workbench is fixedly connected to a stabilizing frame, the outer wall of the stabilizing frame is rotatably connected to a spur gear, and the spur gear is meshingly connected to the rack column 1.
[0008] Furthermore, the stabilizing component includes a positioning frame, which is slidably connected to the inside of the workbench, and a limit pin is slidably connected to the inside of the positioning frame, and the limit pin is fixedly connected to the inside of the workbench. A buffer block is fixedly connected to the inner wall of the positioning frame, and a rack column 2 is fixedly connected to the lower surface of the positioning frame, and the rack column 2 is meshingly connected to the spur gear.
[0009] Furthermore, a transmission pipe is fixedly connected to one side of the inner wall of the workbench, a connecting pipe is fixedly connected to the lower surface of the transmission pipe, one end of the connecting pipe is fixedly connected to a collecting box, and the collecting box is fixedly connected to the inner wall of the workbench.
[0010] Furthermore, a motor 2 is fixedly connected to one side of the inner wall of the workbench, a transmission shaft is fixedly connected to the output end of the motor 2, a negative pressure fan blade is fixedly connected to the outer wall of the transmission shaft, an isolation net is fixedly connected to the inner wall of the transmission pipe, and the transmission shaft is rotatably connected to the inner wall of the isolation net.
[0011] Furthermore, a protective cover is fixedly connected to the inner wall of the transmission pipe, a baffle is fixedly connected to the upper surface of the workbench, the baffle is arranged on one side of the protective cover, a rotating shaft is rotatably connected inside the baffle, and a belt is connected between the rotating shaft and the transmission shaft.
[0012] Furthermore, a bevel gear 1 is fixedly connected to one side of the outer wall of the rotating shaft, a reciprocating screw is rotatably connected to the upper surface of the workbench, one end of the reciprocating screw is fixedly connected to a bevel gear 2, the bevel gear 2 is meshingly connected to the bevel gear 1, a cleaning brush is threadedly connected to the outer wall of the reciprocating screw, the cleaning brush passes through the interior of the baffle and is slidably connected to the upper surface of the workbench.
[0013] The utility model has the following beneficial effects:
[0014] 1. In the utility model, the effect of multi-angle automatic processing is achieved through the cooperation of the moving mechanism, the lifting mechanism and the milling gear mechanism, and then the transmission screw is driven by the starting motor so that the threaded sleeve drives the T-shaped frame and the positioning block to contact the bottom of the workpiece. At the same time, the positioning effect of the lower side and the left and right sides of the workpiece is achieved through the cooperation of the positioning assembly, and then the transmission assembly and the stabilizing assembly are driven by the connecting plate to achieve the effect of stabilizing the workpiece at multiple angles, thereby improving the practicality of the equipment.
[0015] 2. In the utility model, the transmission shaft and the negative pressure fan blades are driven to rotate synchronously by starting the second motor, the internal shaft of the belt is driven to rotate by the transmission shaft, and the bevel gear one and the bevel gear two are meshed and rotated by the rotation of the shaft, and the reciprocating screw is rotated by the rotation of the bevel gear two, and the cleaning brush is driven by the reciprocating screw to collect the debris uniformly, and the debris is collected uniformly by the negative pressure fan blades and collected inside the collection box, thereby improving the practicability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a three-dimensional structural diagram of a positioning and processing device for precision mechanical parts proposed by the utility model;
[0017] Figure 2 This is a schematic diagram of the structure of a cleaning brush part of a positioning and processing device for precision mechanical parts proposed by the utility model;
[0018] Figure 3 for Figure 2 A in the enlarged view;
[0019] Figure 4 This is a schematic diagram of the structure of the connecting pipe part of a positioning and processing device for precision mechanical parts proposed by the utility model;
[0020] Figure 5 for Figure 4 The enlarged view of point B in the figure;
[0021] Figure 6 for Figure 4 Enlarged view of point C in the figure.
[0022] Legend:
[0023] 1. Workbench; 2. Bracket; 3. Moving mechanism; 4. Lifting mechanism; 5. Milling mechanism; 6. Motor 1; 7. Transmission screw; 8. Threaded sleeve; 9. Connecting plate; 10. T-shaped frame; 11. Positioning block; 12. Positioning assembly; 1201. Connecting rod 1; 1202. Positioning clamp arm; 1203. Connecting rod 2; 13. Transmission assembly; 1301. Rack column 1; 1302. Stabilizing frame; 1303. Spur gear; 14. Stabilizing Fixed assembly; 1401, positioning frame; 1402, limit pin; 1403, buffer block; 1404, rack column 2; 15, transmission pipeline; 16, connecting pipe; 17, collecting box; 18, motor 2; 19, transmission shaft; 20, negative pressure fan blade; 21, isolation net; 22, protective cover; 23, baffle; 24, rotating shaft; 25, bevel gear 1; 26, belt; 27, reciprocating screw; 28, bevel gear 2; 29, cleaning brush. DETAILED DESCRIPTION
[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0025] Reference Figure 1 , Figure 2 and Figure 3, the utility model provides an embodiment: a positioning and processing equipment for precision mechanical parts, including a workbench 1, a bracket 2 is fixedly connected to the upper surface of the workbench 1, a moving mechanism 3 is installed on the lower surface of the bracket 2, a lifting mechanism 4 is installed on the lower surface of the moving mechanism 3, a milling mechanism 5 is installed on the output end of the lifting mechanism 4, a motor 6 is fixedly connected to the middle of the inner wall of the workbench 1, a transmission screw 7 is fixedly connected to the output end of the motor 6, a threaded sleeve 8 is threadedly connected to the outer wall of the transmission screw 7, a connecting plate 9 is fixedly connected to the outer wall of the threaded sleeve 8, a T-shaped frame 10 is fixedly connected to the upper surface of the threaded sleeve 8, a positioning block 11 is fixedly connected to the upper surface of the T-shaped frame 10, a positioning component 12 for positioning a workpiece is installed on the outer wall of the T-shaped frame 10, a transmission component 13 for driving a stabilizing component 14 to rise and fall is installed on one side of the inner wall of the workbench 1, and a stabilizing component 14 for stabilizing the workpiece is installed inside the workbench 1; the positioning component 12 includes a connecting rod 1201, a connecting rod 1201 is rotatably connected to one side of the outer wall of the T-shaped frame 10, and a connecting rod 1201 is rotatably connected to one side of the outer wall of the T-shaped frame 10. 01 outer wall is rotatably connected with a positioning clamp arm 1202, and the inner wall of the positioning clamp arm 1202 is rotatably connected with a connecting rod 2 1203, and one side of the connecting rod 2 1203 is rotatably connected to the inside of the workbench 1; the transmission assembly 13 includes a rack column 1301, the rack column 1301 is slidably connected to one side of the inside of the workbench 1, the upper surface of the rack column 1301 is fixedly connected to the lower surface of the connecting plate 9, and the upper surface of the workbench 1 is fixedly connected with a stabilizing frame 1302, and the outer wall of the stabilizing frame 1302 is rotatably connected with a spur gear 130 3. The spur gear 1303 is meshed with the rack column 1 1301; the stabilizing component 14 includes a positioning frame 1401, which is slidably connected to the inside of the workbench 1, and the positioning frame 1401 is internally slidably connected to the limit pin 1402, and the limit pin 1402 is fixedly connected to the inside of the workbench 1, and the inner wall of the positioning frame 1401 is fixedly connected with a buffer block 1403, and the lower surface of the positioning frame 1401 is fixedly connected with a rack column 2 1404, and the rack column 2 1404 is meshed with the spur gear 1303;
[0026] Specifically, first, the circular workpiece is securely placed above the positioning block 11 to ensure that its initial positioning is stable; then, the motor 16 is started, and the motor 16 starts to run at high speed, driving the transmission screw 7 to rotate; the rotation of the transmission screw 7 generates a driving force, which makes the threaded sleeve 8 move smoothly along the direction of the screw; as the threaded sleeve 8 moves, the T-shaped frame 10 connected thereto also begins to move toward the workpiece, and finally the positioning block 11 is in close contact with the bottom of the workpiece, providing a stable supporting environment for the workpiece; at the same time, the movement of the T-shaped frame 10 drives the connecting rod 1201 to push the positioning clamping arm 1202 to the two sides of the workpiece, and the positioning clamping arm 1202 firmly clamps the left and right sides of the workpiece; in order to ensure the accuracy and stability of the clamping process, the connecting rod 2 1203 limits the movement of the positioning clamping arm 1202 to ensure that the movement of the positioning clamping arm 1202 does not exceed the set range, thereby firmly fixing the workpiece and avoiding any displacement or shaking during subsequent processing; in addition, the continuous movement of the threaded sleeve 8 causes the connecting plate 9 to move forward; the connecting plate 9 and the rack column 1 301 connection, when the connecting plate 9 moves, the rack column 1301 meshes with the spur gear 1303, driving the spur gear 1303 to rotate; the rotation of the spur gear 1303 further drives the movement of the rack column 2 1404, thereby pushing the positioning frame 1401 to slide along the outer wall of the limit pin 1402; under the guidance of the limit pin 1402, the positioning frame 1401 accurately slides to the top of the circular workpiece, and gently contacts the top of the workpiece through the buffer block 1403, ensuring that the workpiece remains stable during the entire processing process; after completing the workpiece After azimuth positioning and fixation, the moving mechanism 3 is started, and through its precise control system, fine adjustment of the workpiece in the horizontal direction is achieved, including left and right and front and back movement; this process ensures that the workpiece is in the most ideal position, which is convenient for subsequent processing operations; then, the lifting mechanism 4 is started, and the height of the milling mechanism 5 is adjusted through the lifting function, so that the milling mechanism 5 is aligned with the processing part of the workpiece to ensure the accuracy and effect of the processing; finally, by starting the milling mechanism 5, the milling mechanism 5 starts to operate, and the milling cutter rotates at high speed to perform precise milling processing on the workpiece.
[0027] Reference Figure 1 , Figure 4 , Figure 5 and Figure 6A transmission pipe 15 is fixedly connected to one side of the inner wall of the workbench 1, a connecting pipe 16 is fixedly connected to the lower surface of the transmission pipe 15, one end of the connecting pipe 16 is fixedly connected to a collecting box 17, and the collecting box 17 is fixedly connected to the inner wall of the workbench 1; a motor 2 18 is fixedly connected to one side of the inner wall of the workbench 1, a transmission shaft 19 is fixedly connected to the output end of the motor 2 18, a negative pressure fan blade 20 is fixedly connected to the outer wall of the transmission shaft 19, an isolation net 21 is fixedly connected to the inner wall of the transmission pipe 15, and the transmission shaft 19 is rotatably connected to the inner wall of the isolation net 21; a protective cover 22 is fixedly connected to the inner wall of the transmission pipe 15, and the workbench 1 A baffle 23 is fixedly connected to the upper surface of the table 1, and the baffle 23 is arranged on one side of the protective cover 22. A rotating shaft 24 is rotatably connected inside the baffle 23, and a belt 26 is connected between the rotating shaft 24 and the transmission shaft 19; a bevel gear 1 25 is fixedly connected to one side of the outer wall of the rotating shaft 24, and a reciprocating screw rod 27 is rotatably connected to the upper surface of the workbench 1, and a bevel gear 28 is fixedly connected to one end of the reciprocating screw rod 27, and the bevel gear 28 is meshed with the bevel gear 1 25. A cleaning brush 29 is threadedly connected to the outer wall of the reciprocating screw rod 27, and the cleaning brush 29 passes through the inside of the baffle 23 and is slidably connected to the upper surface of the workbench 1;
[0028] Specifically, after starting the motor 2 18, the motor operates rapidly, driving the transmission shaft 19 and the negative pressure fan blades 20 to rotate synchronously, forming an effective power transmission chain; the rotation of the transmission shaft 19 not only gives the system overall power, but also transmits the rotational energy to the rotating shaft 24 through the belt 26; the rotating shaft 24, as an important node connecting the transmission, drives the bevel gear 1 25 to mesh with the bevel gear 2 28 through its rotation, forming a stable power transmission system; with the continuous rotation of the bevel gear 28, the reciprocating screw 27 begins to reciprocate at a set rhythm, pushing the cleaning brush 29 to move back and forth; driven by the reciprocating screw 27, the cleaning brush 29 moves precisely along a predetermined trajectory, It is capable of efficiently concentrating and cleaning the debris in the working area to the designated location; the design and material selection of the cleaning brush 29 enable it to effectively capture and concentrate the debris during the cleaning process, ensuring the best cleaning effect; at the same time, the high-speed operation of the negative pressure fan blades 20 forms a strong negative pressure environment inside the system; through this negative pressure, the concentrated debris is quickly sucked into the transmission pipe 15; the coordinated design of the transmission pipe 15 and the negative pressure fan blades 20 enables the debris to be smoothly transmitted, avoiding blockage or inefficiency during the cleaning process; the connecting pipe 16 serves as a transmission channel to efficiently guide the debris into the collection box 17, completing the entire process from cleaning to collection.
[0029] Working principle: When in use, first place the circular workpiece on the positioning block 11, then start the motor 16 to drive the transmission screw 7 so that the threaded sleeve 8 drives the T-shaped frame 10 and the positioning block 11 to contact the bottom of the workpiece for stability, and at the same time, the T-shaped frame 10 pushes the connecting rod 1201 so that the positioning clamp arm 1202 drives the clamping pipe, and then the connecting rod 2 1203 limits the movement of the positioning clamp arm 1202, thereby achieving the effect of positioning the lower side and the left and right sides of the workpiece, and at the same time, the movement of the threaded sleeve 8 makes the connecting plate 9 move, and then the connecting plate 9 drives The rack column 1301 meshes and rotates with the spur gear 1303, and the movement of the spur gear 1303 and the rack column 2 1404 achieves the effect of driving the positioning frame 1401 to slide on the outer wall of the limit pin 1402. At this time, the buffer block 1403 contacts the top of the circular pipe, thereby achieving the effect of further stabilizing the workpiece. At this time, the moving mechanism 3 is started to achieve left and right front and back adjustment, and the lifting mechanism 4 can be started to achieve the effect of driving the milling mechanism 5 to lift and lower the height. At this time, the milling mechanism 5 is started to achieve the effect of automatically processing the workpiece.
[0030] Secondly, by starting motor 2 18, the transmission shaft 19 and the negative pressure fan blades 20 are driven to rotate synchronously. At this time, the transmission shaft 19 drives the internal shaft 24 of the belt 26 to rotate, and the rotation of the shaft 24 makes the bevel gear 1 25 mesh and rotate with the bevel gear 2 28, and the rotation of the bevel gear 28 makes the reciprocating screw 27 rotate. At this time, the reciprocating screw 27 drives the cleaning brush 29 to collect the debris in one place, and at the same time, the debris is sucked into the transmission pipe 15 by the negative pressure fan blades 20, and then transmitted to the collection box 17 through the connecting pipe 16 for collection.
[0031] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A positioning and processing device for precision mechanical parts, comprising a workbench (1), characterized in that: The upper surface of the workbench (1) is fixedly connected to a bracket (2), the lower surface of the bracket (2) is installed with a moving mechanism (3), the lower surface of the moving mechanism (3) is installed with a lifting mechanism (4), the output end of the lifting mechanism (4) is installed with a milling gear mechanism (5), the middle part of the inner wall of the workbench (1) is fixedly connected to a motor (6), the output end of the motor (6) is fixedly connected to a transmission screw (7), the outer wall of the transmission screw (7) is threadedly connected to a threaded sleeve (8), the outer wall of the threaded sleeve (8) is fixedly connected to a connecting plate (9), the upper surface of the threaded sleeve (8) is fixedly connected to a T-shaped frame (10), the upper surface of the T-shaped frame (10) is fixedly connected to a positioning block (11), the outer wall of the T-shaped frame (10) is installed with a positioning component (12) for positioning a workpiece, a transmission component (13) for driving a stabilizing component (14) to rise and fall is installed on one side of the inner wall of the workbench (1), and a stabilizing component (14) for stabilizing the workpiece is installed inside the workbench (1).
2. The positioning and processing equipment for precision mechanical parts according to claim 1, characterized in that: The positioning assembly (12) comprises a connecting rod 1 (1201), wherein the connecting rod 1 (1201) is rotatably connected to one side of the outer wall of the T-shaped frame (10), the outer wall of the connecting rod 1 (1201) is rotatably connected to a positioning clamp arm (1202), the inner wall of the positioning clamp arm (1202) is rotatably connected to a connecting rod 2 (1203), and one side of the connecting rod 2 (1203) is rotatably connected to the inside of the workbench (1).
3. The positioning and processing equipment for precision mechanical parts according to claim 2, characterized in that: The transmission assembly (13) comprises a rack column (1301), wherein the rack column (1301) is slidably connected to one side of the interior of the workbench (1), the upper surface of the rack column (1301) is fixedly connected to the lower surface of the connecting plate (9), the upper surface of the workbench (1) is fixedly connected to a stabilizing frame (1302), the outer wall of the stabilizing frame (1302) is rotatably connected to a spur gear (1303), and the spur gear (1303) is meshingly connected to the rack column (1301).
4. The positioning and processing equipment for precision mechanical parts according to claim 3, characterized in that: The stabilizing component (14) comprises a positioning frame (1401), the positioning frame (1401) is slidably connected to the inside of the workbench (1), a limit pin (1402) is slidably connected to the inside of the positioning frame (1401), the limit pin (1402) is fixedly connected to the inside of the workbench (1), a buffer block (1403) is fixedly connected to the inner wall of the positioning frame (1401), and a rack column 2 (1404) is fixedly connected to the lower surface of the positioning frame (1401), and the rack column 2 (1404) is meshingly connected to the spur gear (1303).
5. The positioning and processing equipment for precision mechanical parts according to claim 4, characterized in that: A transmission pipe (15) is fixedly connected to one side of the inner wall of the workbench (1), a connecting pipe (16) is fixedly connected to the lower surface of the transmission pipe (15), one end of the connecting pipe (16) is fixedly connected to a collecting box (17), and the collecting box (17) is fixedly connected to the inner wall of the workbench (1).
6. The positioning and processing equipment for precision mechanical parts according to claim 5, characterized in that: A second motor (18) is fixedly connected to one side of the inner wall of the workbench (1), a transmission shaft (19) is fixedly connected to the output end of the second motor (18), a negative pressure fan blade (20) is fixedly connected to the outer wall of the transmission shaft (19), an isolation net (21) is fixedly connected to the inner wall of the transmission pipe (15), and the transmission shaft (19) is rotatably connected to the inner wall of the isolation net (21).
7. The positioning and processing equipment for precision mechanical parts according to claim 6, characterized in that: A protective cover (22) is fixedly connected to the inner wall of the transmission pipe (15), a baffle (23) is fixedly connected to the upper surface of the workbench (1), the baffle (23) is arranged on one side of the protective cover (22), a rotating shaft (24) is rotatably connected inside the baffle (23), and a belt (26) is connected to the rotating shaft (24) and the transmission shaft (19) for transmission.
8. The positioning and processing equipment for precision mechanical parts according to claim 7, characterized in that: A bevel gear 1 (25) is fixedly connected to one side of the outer wall of the rotating shaft (24); a reciprocating screw rod (27) is rotatably connected to the upper surface of the workbench (1); one end of the reciprocating screw rod (27) is fixedly connected to a bevel gear 2 (28); the bevel gear 2 (28) is meshingly connected to the bevel gear 1 (25); a cleaning brush (29) is threadedly connected to the outer wall of the reciprocating screw rod (27); the cleaning brush (29) passes through the interior of the baffle plate (23) and is slidably connected to the upper surface of the workbench (1).