A circuit board cutting device

Abstract

The present invention relates to the field of circuit board processing, and specifically discloses a circuit board cutting device. By means of a wheel shaft provided with spray holes and a conical cylinder, the cutting fluid is evenly sprayed onto the inner wall of the conical cylinder, and under the action of the centrifugal force generated by the rotation of the cutting wheel itself, the cutting fluid is evenly dispersed onto the entire cutting wheel, improving the cooling effect on the cutting wheel; at the same time, it infiltrates and engulfs the dust generated by cutting; at the same time, by using an upper clamping cover and a lower clamping cover which are symmetrically arranged up and down, a closed cavity is formed between the upper clamping cover and the lower clamping cover and the cutting seam generated by cutting, avoiding the random splashing of the cutting fluid and collecting and discharging the cutting fluid centrally, improving the cleanliness of the working environment; by providing an upper clamping cover and a lower clamping cover including a semi-circular cover, a sliding cover and a spring telescopic rod, the upper clamping cover and the lower clamping cover are elastically in contact with the circuit board body, ensuring the closing effect.

Description

Technical Field

[0001] The present invention relates to the field of circuit board processing, and more specifically, to a circuit board cutting device. Background Art

[0002] A circuit board is an important electronic component, a support for electronic components, and a carrier for the electrical connection of electronic components. Generally composed of an insulating base plate, connecting wires, and pads for assembling and soldering electronic components, it has the dual functions of a conductive circuit and an insulating base plate. It can replace complex wiring and achieve the electrical connection between components in the circuit, not only simplifying the assembly and soldering work of electronic products.

[0003] During the processing of circuit boards, it is generally necessary to cut the circuit boards. In the traditional cutting device, the cutting blade is prone to heat up during long-term cutting, resulting in deformation of the cut seam and affecting the cutting quality. In the traditional method of spraying cutting fluid from the side, only the cutting position is cooled, and the cooling effect is average. In addition, the cutting fluid splashes everywhere, affecting the working environment. Summary of the Invention

[0004] 1. Technical Problems to be Solved

[0005] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a circuit board cutting device, which can achieve uniform distribution of cutting fluid to the entire cutting wheel, improve the cooling effect, and avoid random splashing of the cutting fluid.

[0006] 2. Technical Solutions

[0007] To solve the above problems, the present invention adopts the following technical solutions.

[0008] A circuit board cutting device includes a cutting table and a circuit board body. A clamping frame for clamping the circuit board body is installed on the cutting table; an upper clamping cover in contact with the upper end face of the circuit board body is installed above the clamping frame, and a lower clamping cover in contact with the lower end face of the circuit board body is provided below the clamping frame; the upper clamping cover and the lower clamping cover are arranged opposite to each other and are both connected to a lifting frame. The lifting frame is slidably connected to a chute frame, and a first bidirectional screw rod threadedly connected to the lifting frame is nested in the chute frame. The upper end of the first bidirectional screw rod is connected to a first screw motor; a cutting wheel is nested in the upper clamping cover. The cutting wheel is fixedly connected to a wheel shaft extending outside the upper clamping cover. The wheel shaft is connected to a driving motor through a transmission gear set;

[0009] The wheel shaft is a hollow shaft, and its two ends are connected to a liquid injection pipe through a rotary joint. The liquid injection pipe is connected to a liquid supply mechanism; conical cylinders with openings facing the cutting wheel are installed on both sides of the cutting wheel on the wheel shaft. The part of the wheel shaft inside the conical cylinder is provided with spray holes arranged at equal circumferential intervals;

[0010] The upper clamping cover includes a semi-circular cover and a sliding cover sleeved under the semi-circular cover and vertically slidably connected thereto. The sliding cover is connected to the semi-circular cover through a spring telescopic rod; the lower clamping cover has the same structure as the upper clamping cover and is arranged oppositely; a drain pipe is connected to the lower clamping cover, and the lower end of the drain pipe is connected to a waste liquid tank.

[0011] As a further scheme of the present invention, a cutting groove with a right open end is provided on the right side of the clamping rack. Clamping grooves are provided on the front and rear sides of the clamping rack and are arranged oppositely. A clamping plate vertically slidably connected to the inner wall thereof is nested in the clamping groove. A group of oppositely arranged connecting rods are hinged to the upper end of the clamping plate. A group of oppositely arranged moving blocks are hinged to the upper end of the connecting rod. A second bidirectional lead screw penetrates through the moving block. The left end of the second bidirectional lead screw is connected to a longitudinal shaft through a transmission gear set. A worm gear is sleeved in the middle of the longitudinal shaft. The worm gear meshes with a worm. The worm extends above the clamping rack and is fixedly connected to a hand crank.

[0012] As a further scheme of the present invention: the upper part of the semi-circular cover is a cylinder with a semi-circular cross-section, and the lower part of the semi-circular cover is a prism cylinder with openings at both upper and lower ends and a rectangular cross-section; the sliding cover is a prism cylinder with openings at both upper and lower ends.

[0013] As a further scheme of the present invention: the liquid supply mechanism includes a liquid extraction pump communicated with the injection pipe. The liquid extraction pump is communicated with a liquid storage tank through a pipeline. Cutting fluid is filled in the liquid storage tank.

[0014] As a further scheme of the present invention: the chute frame is provided with a vertical chute. The lifting frame is nested in the vertical chute and slidably abuts against the inner wall of the vertical chute. The first bidirectional lead screw is nested in the vertical chute. The first lead screw motor is fixedly installed on the top of the chute frame.

[0015] As a further scheme of the present invention: the lower end of the chute frame is connected with a horizontal lead screw assembly for driving the chute frame to move horizontally back and forth. The horizontal lead screw assembly includes a horizontal moving block fixedly connected to the lower end of the chute frame, a horizontal slide rail slidably connected to the horizontal moving block, a horizontal lead screw nested in the horizontal slide rail and threadedly connected to the horizontal moving block, and a horizontal lead screw motor connected to the horizontal lead screw.

[0016] As a further scheme of the present invention: the conical cylinder is a frustum cylinder with a wider inner part and a narrower outer part. The conical cylinder is sleeved on the wheel shaft and fixedly connected to the wheel shaft through a locking screw. The spray holes are arranged oppositely to the inner wall of the conical cylinder.

[0017] As a further scheme of the present invention: two independent columnar cavities are provided at both ends of the wheel shaft and are open. The spray holes are communicated with the columnar cavities. The front end of the injection pipe is communicated with a group of branch pipes. Each branch pipe is communicated with one of the columnar cavities through a rotary joint.

[0018] As a further scheme of the present invention: an installation cavity for accommodating the longitudinal shaft, the worm gear and the worm is provided on the left side of the clamping rack. The longitudinal shaft is rotatably connected to an installation plate nested in the installation cavity.

[0019] As a further solution of the present invention: the clamping frame is fixedly connected to the cutting table, and the upper clamping cover and the lower clamping cover are respectively arranged on the upper side and the lower side of the cutting groove.

[0020] 3. Beneficial effects

[0021] Compared with the prior art, the advantages of the present invention are as follows:

[0022] (1) By providing a wheel shaft with spray holes and a conical cylinder in the present invention, the cutting fluid is evenly sprayed onto the inner wall of the conical cylinder, and under the action of the centrifugal force generated by the rotation of the cutting wheel itself, the cutting fluid is evenly dispersed on the entire cutting wheel, improving the cooling effect on the cutting wheel; at the same time, it infiltrates and engulfs the dust generated by cutting; at the same time, by using the upper clamping cover and the lower clamping cover which are symmetrically arranged up and down, a closed cavity is formed between the upper clamping cover and the lower clamping cover and the cutting seam generated by cutting, avoiding the random splashing of the cutting fluid and collecting and discharging the cutting fluid centrally, improving the cleanliness of the working environment.

[0023] (2) By providing the upper clamping cover and the lower clamping cover including a semi-circular cover, a sliding cover and a spring telescopic rod in the present invention, the upper clamping cover and the lower clamping cover are in elastic contact with the circuit board body, ensuring the sealing effect.

[0024] (3) By providing a liquid injection pipe with a branch pipe at the front end in the present invention, the cutting fluid is evenly dispersed on the two end faces of the cutting wheel, ensuring uniform and sufficient contact between the cutting fluid and the two end faces of the cutting wheel, improving the cooling and dust reduction effects; through the drain pipe and the waste liquid tank communicated with the lower clamping cover, it is convenient to collect the waste liquid.

[0025] (4) By providing a clamping frame with a clamping assembly in the present invention, the clamping frame is provided with a cutting groove with an open right end, and a clamping groove is arranged inside the cutting groove, which is convenient for suspending and clamping the circuit board body and is convenient for horizontal continuous cutting. Description of the drawings

[0026] Figure 1 It is a three-dimensional structural schematic diagram of the front side view of the present invention;

[0027] Figure 2 It is a three-dimensional structural schematic diagram of the rear side view of the present invention;

[0028] Figure 3 It is a longitudinal sectional structural schematic diagram of the present invention;

[0029] Figure 4 It is an assembly structural schematic diagram of the upper clamping cover and the lower clamping cover in the present invention;

[0030] Figure 5 It is an assembly structural schematic diagram of the semi-circular cover and the sliding cover in the present invention;

[0031] Figure 6 Schematic diagram of the assembly structure of the cutting wheel and the axle in the present invention;

[0032] Figure 7 Schematic cross-sectional view of the axle in the present invention;

[0033] Figure 8 Schematic perspective view of the clamping bracket in the present invention;

[0034] Figure 9 Schematic cross-sectional view of the clamping bracket in the transverse direction in the present invention;

[0035] Figure 10 Schematic cross-sectional view of the clamping bracket in the horizontal direction in the present invention.

[0036] Explanation of the reference numerals in the figure: 1. Cutting table; 2. Circuit board body; 3. Clamping bracket; 301. Cutting groove; 302. Clamping groove; 303. Installation cavity; 4. Upper clamping cover; 401. Semi-circular cover; 402. Sliding cover; 403. Spring telescopic rod; 5. Lower clamping cover; 6. Lifting frame; 7. Chute frame; 8. First bidirectional lead screw; 9. First lead screw motor; 10. Cutting wheel; 11. Axle; 1101. Conical cylinder; 1102. Spray hole; 12. Driving motor; 13. Liquid injection pipe; 14. Liquid pumping pump; 15. Liquid storage tank; 16. Drain pipe; 17. Waste liquid tank; 18. Horizontal lead screw assembly; 19. Clamping plate; 20. Link; 21. Moving block; 22. Second bidirectional lead screw; 23. Longitudinal axis; 24. Worm gear; 25. Worm; 26. Hand crank. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0038] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0039] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, terms such as "installation", "equipped with", "sheathed / connected", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] Please refer to Figure 1-7 , in an embodiment of the present invention, a circuit board cutting device includes a cutting table 1 and a circuit board body 2; a clamping frame 3 for clamping the circuit board body 2 is installed on the cutting table 1; an upper clamping cover 4 abutting against the upper end face of the circuit board body 2 is installed above the clamping frame 3, and a lower clamping cover 5 abutting against the lower end face of the circuit board body 2 is provided below the clamping frame 3; the upper clamping cover 4 and the lower clamping cover 5 are arranged oppositely and are both connected with a lifting frame 6, the lifting frame 6 is slidably connected with a chute frame 7, a first bidirectional lead screw 8 threadedly connected with the lifting frame 6 is nested in the chute frame 7, and the upper end of the first bidirectional lead screw 8 is connected with a first lead screw motor 9; a cutting wheel 10 is nested in the upper clamping cover 4, a wheel shaft 11 extending outside the upper clamping cover 4 is fixedly connected to the cutting wheel 10, and the wheel shaft 11 is connected with a driving motor 12 through a transmission gear set;

[0041] The wheel shaft 11 is a hollow shaft and its two ends are communicated with a liquid injection pipe 13 through a rotary joint, and the liquid injection pipe 13 is communicated with a liquid supply mechanism; conical cylinders 1101 with openings facing the cutting wheel 10 are installed on both sides of the cutting wheel 10 on the wheel shaft 11, and spray holes 1102 arranged at equal circumferential intervals are formed in the part of the wheel shaft 11 inside the conical cylinders 1101;

[0042] The upper clamping cover 4 includes a semi-circular cover 401 and a sliding cover 402 sleeved below the semi-circular cover 401 and vertically slidably connected thereto, and the sliding cover 402 is connected with the semi-circular cover 401 through a spring telescopic rod 403; the lower clamping cover 5 has the same structure as the upper clamping cover 4 and is arranged oppositely; the lower clamping cover 5 is communicated with a drain pipe 16, and the lower end of the drain pipe 16 is communicated with a waste liquid tank 17.

[0043] Specifically, when cutting the circuit board body 2, the circuit board body 2 is clamped on the clamping frame 3. The first lead screw motor 9 is started, and the first lead screw motor 9 drives the symmetrically arranged lifting frames 6 to move towards each other. The lifting frames 6 drive the upper clamping cover 4 and the lower clamping cover 5 to move towards each other, so that the upper clamping cover 4 abuts against the upper end face of the circuit board body 2 and the lower clamping cover 5 abuts against the lower end face of the circuit board body 2. Then, the drive motor 12 and the liquid supply mechanism are started. The drive motor 12 drives the wheel shaft 11 and the cutting wheel 10 to rotate through the transmission gear set. The lifting frame 6 drives the cutting wheel 10 to cut downward. At the same time, the liquid supply mechanism injects the cutting fluid into the wheel shaft 11 and sprays it out from the spray holes 1102. As the wheel shaft 11 drives the conical cylinder 1101 to rotate, under the centrifugal force, the cutting fluid is evenly dispersed on the entire cutting wheel 10. During the cutting process, the cutting fluid evenly cools the cutting wheel 10 on the cutting wheel 10 to prevent the cutting wheel 10 from being deformed due to excessive temperature. At the same time, during the cutting process, the cutting fluid is in full contact with the circuit board body 2 along with the cutting wheel 10, infiltrating and swallowing the dust generated at the cutting position. The cutting fluid mixture containing dust enters the lower clamping cover 5 below through the cutting seam and is discharged into the waste liquid tank 17 through the drain pipe 16 to realize the recycling of the cutting fluid. The upper clamping cover 4, the lower clamping cover 5, and the cutting seam formed by cutting form a closed cavity to prevent dust and cutting fluid from overflowing.

[0044] In this embodiment, the upper part of the semi-circular cover 401 is a cylinder with a semi-circular cross-section, and the lower part of the semi-circular cover 401 is a prism cylinder with openings at both upper and lower ends and a rectangular cross-section; the sliding cover 402 is a prism cylinder with openings at both upper and lower ends.

[0045] Specifically, when the semi-circular cover 401 drives the cutting wheel 10 to move downward, the semi-circular cover 401 is inserted into the sliding cover 402 to ensure the sealing effect during the cutting process of the cutting wheel 10.

[0046] In this embodiment, a rubber strip in the shape of a rectangular frame is fixedly connected to the lower edge of the sliding cover 402.

[0047] Specifically, when the sliding cover 402 contacts the circuit board body 2, it will not damage the circuit board body and is convenient for the sliding cover 402 to slide on the circuit board body.

[0048] In this embodiment, the liquid supply mechanism includes a liquid pumping pump 14 communicated with the injection pipe 13. The liquid pumping pump 14 is communicated with a liquid storage tank 15 through a pipeline, and the liquid storage tank 15 is filled with cutting fluid.

[0049] Specifically, the liquid extraction pump 14 injects the cutting fluid in the liquid storage tank 15 into the axle 11 through the liquid injection pipe 13. The cutting fluid entering the axle 11 is sprayed onto the inner wall of the conical cylinder 1101 through the spray holes 1102. During the process of the axle 11 driving the conical cylinder 1101 to perform circular motion, the cutting fluid is evenly dispersed on the surface of the cutting wheel 10 by means of centrifugal force.

[0050] In this embodiment, the chute frame 7 is provided with a vertical chute. The lifting frame 6 is nested in the vertical chute and is in sliding contact with the inner wall of the vertical chute. The first bidirectional lead screw 8 is nested in the vertical chute, and the first lead screw motor 9 is fixedly installed at the top of the chute frame 7.

[0051] Specifically, the relative or opposite movement of the upper clamping cover 4 and the lower clamping cover 5 is realized, which facilitates the sealing and opening of the cutting position.

[0052] In this embodiment, the lower end of the chute frame 7 is connected with a horizontal lead screw assembly 18 for driving the chute frame 7 to move horizontally back and forth. The horizontal lead screw assembly 18 includes a horizontal moving block fixedly connected to the lower end of the chute frame 7, a horizontal slide rail slidably connected to the horizontal moving block, a horizontal lead screw nested in the horizontal slide rail and threadedly connected to the horizontal moving block, and a horizontal lead screw motor connected to the horizontal lead screw.

[0053] Specifically, the cutting wheel 10, the upper clamping cover 4, and the lower clamping cover 5 are driven by the horizontal lead screw assembly 18 to move horizontally back and forth to perform horizontal cutting on the circuit board body 2.

[0054] In this embodiment, the conical cylinder 1101 is a frustum cylinder with a wider inner part and a narrower outer part. The conical cylinder 1101 is sleeved on the axle 11 and is fixedly connected to the axle 11 through a locking screw. The spray holes 1102 are arranged opposite to the inner wall of the conical cylinder 1101.

[0055] In this embodiment, two independent columnar cavities are provided at both ends of the axle 11 with openings. The spray holes 1102 are communicated with the columnar cavities. The front end of the liquid injection pipe 13 is communicated with a group of branch pipes, and each branch pipe is communicated with one of the columnar cavities through a rotary joint.

[0056] Specifically, the cutting fluid is evenly scattered on both end faces of the cutting wheel 10, improving the cooling effect and the dust reduction effect.

[0057] Please refer to Figure 3 and Figure 8-10, in another embodiment of the present invention, a cutting groove 301 with a right opening is provided on the right side of the clamping frame 3. Clamping grooves 302 are provided on the front and rear sides of the clamping frame 3 on both sides of the cutting groove 301. A clamping plate 19 vertically slidably connected to its inner wall is nested in the clamping groove 302. A set of oppositely arranged connecting rods 20 are hinged to the upper end of the clamping plate 19. A set of oppositely arranged moving blocks 21 are hinged to the upper ends of the connecting rods 20. A second bidirectional lead screw 22 passes through the moving blocks 21. The left end of the second bidirectional lead screw 22 is connected to a longitudinal shaft 23 through a transmission gear set. A worm gear 24 is sleeved on the middle part of the longitudinal shaft 23. The worm gear 24 meshes with a worm 25. The worm 25 extends above the clamping frame 3 and is fixedly connected to a hand crank 26.

[0058] Specifically, when clamping the circuit board body 2, the circuit board body 2 is inserted into the clamping groove 302 from the opening on the right side of the cutting groove 301. Then, the hand crank 26 is rotated. The worm 25 drives the second bidirectional lead screw 22 to rotate through the worm gear 24 and the longitudinal shaft 23. The second bidirectional lead screw 22 drives the moving blocks 21 to move towards each other. The moving blocks 21 drive the clamping plate 19 through the connecting rods 20 to squeeze and fix the circuit board body 2, facilitating the quick clamping, fixing, and releasing of the circuit board body 2.

[0059] In this embodiment, an installation cavity 303 for accommodating the longitudinal shaft 23, the worm gear 24, and the worm 25 is provided on the left side of the clamping frame 3. The longitudinal shaft 23 is rotatably connected to an installation plate nested in the installation cavity 303.

[0060] Specifically, it facilitates the transmission operation of the second bidirectional lead screw 22 and the hand crank 26.

[0061] In this embodiment, the clamping frame 3 is fixedly connected to the cutting table 1. The upper clamping cover 4 and the lower clamping cover 5 are respectively arranged on the upper side and the lower side of the cutting groove 301.

[0062] Specifically, it realizes the suspended clamping of the circuit board body 2, so that when cutting the circuit board body, the clamping frame 3 will not block the up-and-down movement and horizontal movement of the upper clamping cover 4 and the lower clamping cover 5, facilitating the cutting movement.

[0063] The above is only a preferred specific embodiment of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A circuit board cutting device, characterized in that, It includes a cutting table (1) and a circuit board body (2). A clamping frame (3) for clamping the circuit board body (2) is installed on the cutting table (1); an upper clamping cover (4) abutting against the upper end face of the circuit board body (2) is installed above the clamping frame (3), and a lower clamping cover (5) abutting against the lower end face of the circuit board body (2) is arranged below the clamping frame (3); the upper clamping cover (4) and the lower clamping cover (5) are arranged oppositely and are both connected with a lifting frame (6). The lifting frame (6) is slidably connected with a chute frame (7). A first bidirectional lead screw (8) threadedly connected with the lifting frame (6) is nested in the chute frame (7). The upper end of the first bidirectional lead screw (8) is connected with a first lead screw motor (9); a cutting wheel (10) is nested in the upper clamping cover (4). The cutting wheel (10) is fixedly connected with a wheel shaft (11) extending outside the upper clamping cover (4). The wheel shaft (11) is connected with a driving motor (12) through a transmission gear set; The wheel shaft (11) is a hollow shaft and its two ends are communicated with a liquid injection pipe (13) through rotary joints. The liquid injection pipe (13) is communicated with a liquid supply mechanism; conical cylinders (1101) with openings facing the cutting wheel (10) are installed on both sides of the cutting wheel (10) of the wheel shaft (11). Spray holes (1102) arranged at equal circumferential intervals are formed in the part of the wheel shaft (11) inside the conical cylinders (1101); The upper clamping cover (4) includes a semi-circular cover (401) and a sliding cover (402) sleeved below the semi-circular cover (401) and vertically slidably connected with it. The sliding cover (402) is connected with the semi-circular cover (401) through a spring telescopic rod (403); the lower clamping cover (5) has the same structure as the upper clamping cover (4) and is arranged oppositely; the lower clamping cover (5) is communicated with a drain pipe (16), and the lower end of the drain pipe (16) is communicated with a waste liquid tank (17); A cutting groove (301) with a right open end is formed on the right side of the clamping frame (3). Clamping grooves (302) arranged oppositely are formed on the front and rear sides of the clamping frame (3) at the cutting groove (301). A clamping plate (19) vertically slidably connected with the inner wall thereof is nested in the clamping groove (302). A group of oppositely arranged connecting rods (20) are hinged to the upper end of the clamping plate (19). A group of oppositely arranged moving blocks (21) are hinged to the upper end of the connecting rods (20). A second bidirectional lead screw (22) penetrates through the moving blocks (21). The left end of the second bidirectional lead screw (22) is connected with a longitudinal shaft (23) through a transmission gear set. A worm gear (24) is sleeved in the middle of the longitudinal shaft (23). The worm gear (24) meshes with a worm (25). The worm (25) extends above the clamping frame (3) and is fixedly connected with a hand crank (26).

2. The circuit board cutting device according to claim 1, characterized in that, The upper part of the semi-circular cover (401) is a cylinder with a semi-circular cross-section, and the lower part of the semi-circular cover (401) is a prism cylinder with openings at both upper and lower ends and a rectangular cross-section; the sliding cover (402) is a prism cylinder with openings at both upper and lower ends.

3. The circuit board cutting device according to claim 1, characterized in that, The liquid supply mechanism includes a liquid extraction pump (14) communicated with the liquid injection pipe (13). The liquid extraction pump (14) is communicated with a liquid storage tank (15) through a pipeline. Cutting fluid is filled in the liquid storage tank (15).

4. A circuit board cutting device according to claim 1, characterized in that, The chute frame (7) is provided with a vertical chute, the lifting frame (6) is nested in the vertical chute and is in sliding contact with the inner wall of the vertical chute, the first bidirectional lead screw (8) is nested in the vertical chute, and the first lead screw motor (9) is fixedly installed at the top of the chute frame (7).

5. A circuit board cutting device according to claim 1, characterized in that, The lower end of the chute frame (7) is connected with a horizontal lead screw assembly (18) for driving the chute frame (7) to move horizontally back and forth. The horizontal lead screw assembly (18) includes a horizontal moving block fixedly connected to the lower end of the chute frame (7), a horizontal slide rail slidably connected to the horizontal moving block, a horizontal lead screw nested in the horizontal slide rail and threadedly connected to the horizontal moving block, and a horizontal lead screw motor connected to the horizontal lead screw.

6. A circuit board cutting device according to claim 1, characterized in that, The conical cylinder (1101) is a frustum cylinder with a wider inner width and a narrower outer width. The conical cylinder (1101) is sleeved on the wheel axle (11) and is fixedly connected to the wheel axle (11) through a locking screw. The spray holes (1102) are arranged opposite to the inner wall of the conical cylinder (1101).

7. An electric circuit main board cutting device according to claim 6, characterized in that, Both ends of the wheel axle (11) are open and provided with two independent columnar cavities. The spray holes (1102) are communicated with the columnar cavities. The front end of the liquid injection pipe (13) is communicated with a group of branch pipes, and each branch pipe is communicated with one of the columnar cavities through a rotary joint.

8. A circuit board cutting device according to claim 1, characterized in that, An installation cavity (303) for accommodating the longitudinal shaft (23), the worm gear (24) and the worm (25) is arranged on the left side of the clamping frame (3). The longitudinal shaft (23) is rotatably connected with a mounting plate nested in the installation cavity (303).

9. A circuit board cutting device according to claim 2, characterized in that, The clamping frame (3) is fixedly connected to the cutting table (1), and the upper clamping cover (4) and the lower clamping cover (5) are respectively arranged on the upper side and the lower side of the cutting groove (301).

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