Precise slitting system for PCB (Printed Circuit Board) offcut

Abstract

The invention relates to a PCB rim charge accurate slitting system which comprises a frame body, a conveying assembly, a fixing assembly, a slitting assembly a, a slitting assembly b, a grinding machine and a switching assembly, a bearing block used for bearing a PCB is rotationally arranged on the conveying assembly, the bearing block is used for conveying the PCB, the fixing assembly is used for fixing the PCB in the conveying process of the bearing block, and the grinding machine is used for grinding the PCB. A splitting machine a and a splitting machine b which are used for splitting rim charges on a PCB are arranged in the splitting assembly a and the splitting assembly b respectively, the rotating directions of the splitting machine a and the splitting machine b are opposite, air blowing cylinders are arranged on the side faces of the splitting machine a and the splitting machine b, the air blowing cylinder corresponding to the splitting machine a blows air in an inclined mode from top to bottom, and the air blowing cylinder corresponding to the splitting machine b blows air in an inclined mode from bottom to top. And an air blowing cylinder correspondingly arranged on the splitting machine b obliquely blows air from bottom to top, the air blowing cylinder is used for splitting the PCB so that air blowing can be conducted on the PCB stably, and the problems that in the process that the PCB is cut off through a cutter, the PCB can vibrate at high frequency, the PCB is fragile, and irreversible damage to the PCB is likely to be caused are solved.

Description

Technical Field

[0001] The invention relates to the technical field of PCB board cutting, in particular to a PCB edge material precise cutting system. Background Art

[0002] PCB board, Chinese name is printed circuit board, also known as printed circuit board, is an important electronic component, the support of electronic components, and the carrier for the electrical connection of electronic components. Because it is made by electronic printing, it is called "printed" circuit board. In the production process of PCB board, there is usually waste around the carrier board after pressing, so the waste part needs to be cut off.

[0003] A Chinese invention patent with application publication number CN118219328A discloses a PCB board cutting and grinding device, including an equipment frame, a waste discharge assembly is arranged above the equipment frame, a material transport assembly is arranged above the waste discharge assembly, and pressure plate assemblies are arranged on both sides of the material transport assembly, and grinding and cutting assemblies are arranged at one end of the two groups of pressure plate assemblies, and dust collection assemblies are arranged on the other side of the two groups of pressure plate assemblies; the grinding and cutting assembly includes an upper knife and a lower knife arranged up and down. This application realizes the grinding and cutting of the plate by a set of grinding and cutting assemblies by combining the upper knife and the lower knife that are staggered inside the grinding and cutting assembly, and cooperates with the pressure plate assembly, and realizes the discharge of waste chips and dust attached to the outer surface of the waste chips by the waste discharge assembly, and can separate the attached dust by vibration, and cooperate with the dust collection assembly to achieve sufficient dust removal, and can also achieve screening of waste chips by vibration.

[0004] However, the inventors found that the device has the following problems: when the cutter is cutting the PCB board, the PCB board will vibrate at a high frequency, and the PCB board itself is relatively brittle, which can easily cause irreversible damage to the PCB board. Summary of the invention

[0005] The purpose of the present invention is to invent a PCB edge material precision slitting system in view of the deficiencies of the prior art. A slitter a and a slitter b are arranged on both sides of the PCB board conveyor, and the slitter a and the slitter b cut the PCB board in different rotation directions respectively. An air blow tube is arranged on the sides of the slitter a and the slitter b. During the PCB board cutting process, the air blow tube continuously blows air to offset the high-frequency vibration generated by the PCB board, thereby solving the problem that the PCB board will generate high-frequency vibration during the PCB board cutting process by the cutter, and the PCB board itself is relatively brittle and easily causes irreversible damage to the PCB board.

[0006] In view of the above technical problems, the technical solution adopted by the present invention is as follows: a PCB edge material precision slitting system, comprising a frame, a conveying component, a fixing component, a slitting component a, a slitting component b, a grinder, and a switching component. The conveying component comprises a conveying seat arranged on the frame and a conveying block slidably arranged on the conveying seat, a bearing block for bearing a PCB board is rotatably arranged on the conveying block, the bearing block is used to convey the PCB board, the fixing component is used to fix the PCB board during the conveying process of the bearing block, the slitting component a and the slitting component b are provided on the conveying block, and the slitting component b is provided on the conveying block. The cutting component b is respectively provided with a slitter a and a slitter b for slitting the edge materials on the PCB board. The switching component is used to reverse the PCB board by 90 degrees so that the other two sides can be slid and polished. The air blow tube corresponding to the slitter a blows air from top to bottom at an angle, and the air blow tube corresponding to the slitter b blows air from bottom to top at an angle. The sides of the slitter a and the slitter b are both provided with air blow tubes, and the direction of the air blow tube is set to be opposite to the rotation direction of the slitter. The air blow tube is used for slitting the PCB board so that the PCB board can be air-blown and stabilized.

[0007] As a preferred embodiment, the fixing assembly includes a fixing rod arranged on the conveying block, a sliding plate is slidably arranged on the fixing rod, a pressing block is arranged on the lower end surface of the sliding plate, a buffer cylinder is arranged on the upper end surface of the sliding plate, a sliding rod is slidably arranged in the buffer cylinder, a sliding rail for driving the sliding rod to descend is arranged above the moving path of the conveying block, a spring mounted on the fixing rod is arranged between the sliding plate and the conveying block, and a spring is also arranged on the sliding rod and the inner wall surface of the buffer cylinder.

[0008] As a preferred embodiment, the slitting component a and the slitting component b both include side panels arranged on the frame and motors arranged on the side panels, the side panels are provided with a base and a cover plate, a threaded rod is provided on the motor output shaft, a slide is meshedly provided on the threaded rod, the slide is slidably provided on the base, a movable plate is provided on the slide, a fixing part is provided on the movable plate, and the slitting machine a and the slitting machine b are clamped on the fixing part.

[0009] Preferably, the switching assembly comprises a gear and a switching block arranged below the bearing block, and a rack meshing with the gear and a limit bar fitted with the switching block are arranged on the moving path of the conveying block.

[0010] As a preference, an air pipe is provided on the air blowing cylinder, an air circuit main pipe connected with the air pipe is provided in the frame, and one end of the air circuit main pipe is connected to an air pump.

[0011] As a preferred embodiment, the bearing block is provided with a plurality of card blocks which fit with the PCB board.

[0012] As a preference, the fixing rod is rectangular in shape, and a limiting plate is provided on the upper end surface of the fixing rod.

[0013] As a preference, the lower end of the pressing block is configured to be hemispherical.

[0014] As a preference, the number of teeth of the gear is 20, and the number of teeth of the rack is 5.

[0015] As a preference, the limit bar is disconnected at the rack.

[0016] Beneficial effects of the present invention:

[0017] 1. A threaded rod is arranged on the motor, a slide is meshed on the threaded rod, a moving plate is arranged on the slide, a fixing piece is arranged on the moving plate, a slitter is fixedly arranged by the fixing piece, and the threaded rod is driven to rotate by the motor, so that the distance between the slitter and the PCB board can be adjusted to adapt to PCB boards of different lengths.

[0018] 2. When the cutter on the slitting machine rotates and the PCB board contacts the cutter, the cutting direction of the cutter is affected by the resistance of the burr, which will cause the PCB board to generate a downward or upward force. This part of the force can be offset by blowing with an air blower installed on the side of the slitting machine to prevent irreversible damage to the PCB board.

[0019] 3. By arranging a gear and a switching block under the bearing block, a limit bar is arranged on the moving path of the switching block, and the limit bar is fitted with the switching block, and a rack is arranged on the moving path of the gear, the rack can be engaged with the gear to drive the gear to rotate, thereby switching the PCB board, so that all four sides of the PCB can be cut.

[0020] In summary, the equipment has the advantages of being able to adapt to different PCB boards and prevent PCB boards from being damaged, and is particularly suitable for the field of PCB board slitting technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0022] Figure 1 It is a structural schematic diagram of a PCB edge material precision cutting system;

[0023] Figure 2 It is a structural schematic diagram of a fixed component in a PCB edge material precision cutting system;

[0024] Figure 3 A cross-sectional view of a fixed component in a PCB edge material precision cutting system;

[0025] Figure 4 It is a structural schematic diagram of a slitting component in a PCB edge material precision slitting system;

[0026] Figure 5 It is a structural schematic diagram of a switching component in a PCB edge material precision cutting system;

[0027] Figure 6 A front view of a switching component in a PCB edge material precision cutting system;

[0028] Figure 7 It is a working state diagram of a slitting machine a in a PCB edge material precise slitting system;

[0029] Figure 8 It is a working state diagram of a slitting machine b in a PCB edge material precise slitting system;

[0030] Fig. 9 This is a working status diagram of a fixed component in a PCB edge material precision cutting system;

[0031] Fig.10 This is the effect status diagram of the burr after the slitting machine a is removed;

[0032] Fig.11 This is the effect status diagram of the air blowing tube after the slitting machine a is cut;

[0033] Fig.12 This is the effect status diagram of the burr after slitting machine b is removed;

[0034] Fig.13 This is a diagram showing the effect of the air blowing tube after the slitting machine b is cut.

[0035] The attached drawings are marked as follows: 1. frame; 2. conveying assembly; 3. fixing assembly; 4. slitting assembly a; 5. slitting assembly b; 6. grinder; 7. switching assembly; 8. conveying seat; 9. conveying block; 10. bearing block; 11. slitting machine a; 12. slitting machine b; 13. air blower; 21. fixing rod; 22. slide plate; 23. pressing block; 24. buffer cylinder; 25. sliding rod; 26. sliding rail; 31. side plate; 32. motor; 33. base; 34. cover plate; 35. threaded rod; 36. slide table; 37. moving plate; 38. fixing part; 41. gear; 42. switching block; 43. rack; 44. limit strip; 51. air pipe; 52. air main pipe; 53. air pump; 61. block; 71. limit plate. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings.

[0037] Embodiment 1

[0038] like Figures 1 to 13 As shown, a PCB edge material precision slitting system includes a frame 1, a conveying component 2, a fixing component 3, a slitting component a4, a slitting component b5, a grinder 6, and a switching component 7. The conveying component 2 includes a conveying seat 8 arranged on the frame 1 and a conveying block 9 slidably arranged on the conveying seat 8. A bearing block 10 for bearing a PCB board is rotatably arranged on the conveying block 9. The bearing block 10 is used to convey the PCB board. The fixing component 3 is used to fix the PCB board during the conveying process of the bearing block 10. The slitting components a4 and b5 are respectively provided with The slitter a11 and the slitter b12 are used for slitting the edge materials on the PCB board. The switching component 7 is used to reverse the PCB board by 90 degrees so that the other two sides can be slid and polished. The rotation directions of the slitter a11 and the slitter b12 are opposite. The sides of the slitter a11 and the slitter b12 are both provided with an air blow tube 13. The air blow tube 13 corresponding to the slitter a11 blows air from top to bottom at an angle, and the air blow tube 13 corresponding to the slitter b12 blows air from bottom to top at an angle. The air blow tube 13 is used for slitting the PCB board so that the PCB board can be air-blown to be stable.

[0039] It is worth mentioning here that during the slitting process of the slitting machines a11 and b12, the cutter will be affected by the burr resistance during the rotation process to form a force that drives the PCB board downward or upward, thereby causing the PCB board to deform. By arranging an air blow tube 4 on the side, the force generated during the slitting of the PCB board can be offset. It is also explained here that by arranging the slitting machines a11 and b12 to rotate in opposite directions, the deformation caused by slitting can be neutralized by slitting in opposite directions.

[0040] like Figure 2 , Figure 3 As shown, the fixing assembly 3 includes a fixing rod 21 arranged on the conveying block 9, a slide plate 22 is slidably arranged on the fixing rod 21, a pressing block 23 is arranged on the lower end surface of the slide plate 22, a buffer cylinder 24 is arranged on the upper end surface of the slide plate 22, a sliding rod 25 is slidably arranged in the buffer cylinder 24, a sliding rail 26 for driving the sliding rod 25 to descend is arranged above the moving path of the conveying block 9, a spring sleeved on the fixing rod 21 is arranged between the slide plate 22 and the conveying block 9, and a spring is also arranged on the sliding rod 25 and the inner wall surface of the buffer cylinder 24.

[0041] It is worth noting that the slide plate 22 descends under the action of the slide rail 26 during the movement of the conveying block 9, thereby driving the pressing block 23 to descend. When the pressing block 23 contacts the PCB board, the slide plate 22 continues to descend, driving the spring to compress, so that the pressing block 23 can adapt to PCB boards of various thicknesses, and the slide bar 25 can be buffered by the compression spring.

[0042] like Figure 4 As shown, the slitting assembly a4 and the slitting assembly b5 both include a side plate 31 arranged on the frame 1 and a motor 32 arranged on the side plate 31, the side plate 31 is provided with a base 33 and a cover plate 34, a threaded rod 35 is provided on the output shaft of the motor 32, a slide 36 is meshedly provided on the threaded rod 35, the slide 36 is slidably provided on the base 33, a movable plate 37 is provided on the slide 36, a fixing part 38 is provided on the movable plate 37, and the slitting machine a11 and the slitting machine b12 are clamped on the fixing part 38.

[0043] It should be noted here that a threaded rod 35 is arranged on the motor 32, a slide 36 is meshedly arranged on the threaded rod 35, a movable plate 37 is arranged on the slide 36, and a fixing part 38 is arranged on the movable plate 37. A slitting machine is fixedly arranged by the fixing part 38. The threaded rod 35 is driven to rotate by the motor, so that the distance between the slitting machine and the PCB board can be adjusted to adapt to PCB boards of different lengths in turn.

[0044] like Figure 5 , Figure 6 As shown, the switching assembly 7 includes a gear 41 and a switching block 42 arranged below the bearing block 10, and a rack 43 meshing with the gear 41 and a limit bar 44 abutting against the switching block 42 are arranged on the moving path of the conveying block 9.

[0045] In addition, the switching block 42 can be limited by the limit bar 44 to prevent the PCB board from deviating and rotating during transportation. At the same time, the rack 43 drives the gear 41 to rotate, so that the PCB board can be switched and the uncut surface can be rotated to both sides for cutting, thereby improving the cutting efficiency.

[0046] like Figure 1 As shown, an air pipe 51 is disposed on the air blowing cylinder 13 , and an air circuit main pipe 52 communicating with the air pipe 51 is disposed in the frame 1 , and one end of the air circuit main pipe 52 is connected to an air pump 53 .

[0047] It should also be mentioned that the air blow tube 13 is inclined at 60° toward the PCB board, and the air blowing port of the air blow tube 13 is flat. Burrs will be generated after the PCB board is cut, and the direction of the burrs is consistent with the rotation direction of the cutter of the slitting machine. The burrs can be blown away by the flat air blow tube 13, so that the burrs are inclined to the side, which is convenient for subsequent grinding.

[0048] like Figure 3 As shown, the carrier block 10 is provided with a plurality of clamping blocks 61 which fit with the PCB board.

[0049] It is worth mentioning that before the PCB board is cut, a limit hole of the same size as the block 61 will be pressed out by a press. By overlapping the limit hole with the block 61, the PCB board can be prevented from being offset during working and affecting the processing accuracy.

[0050] like Figure 3 As shown, the fixing rod 21 is rectangular in shape, and a limiting plate 71 is provided on the upper end surface of the fixing rod 21 .

[0051] It is worth noting that, by setting the fixing rod 21 to be rectangular, the fixing rod 21 can be limited so that the fixing rod 21 can only move up and down, and the limiting plate 71 can prevent the slide plate 22 from falling out.

[0052] like Figure 2 As shown, the lower end of the pressing block 23 is configured to be hemispherical.

[0053] Secondly, by setting the lower end of the pressing block 23 to be hemispherical, the pressing block 23 can press the PCB board while the hemispherical shape can make the PCB board easily rotate without damaging the surface of the PCB board.

[0054] like Figure 5 As shown, the number of teeth of the gear 41 is 20, and the number of teeth of the rack 43 is 5.

[0055] In addition, it should be noted that by setting the number of teeth of the rack to one-fourth of the number of teeth of the gear 41 , the PCB board can be rotated 90° via the rack 43 .

[0056] like Figure 5 As shown, the limiting strip 44 is disconnected at the rack 43 .

[0057] It is worth mentioning that by disconnecting the limit bar 44 at the rack 43, interference can be prevented when the PCB board rotates.

[0058] The working process is as follows:

[0059] The PCB board is placed on the carrier block 10 by a manipulator and fits with the clamping block 61. The carrier block 10 moves under the drive of the conveying block 9, and descends under the action of the slide rail 26 during the movement, thereby driving the pressing block 23 to descend. When the pressing block 23 contacts the PCB board, the slide plate 22 continues to descend, driving the spring to compress, so that the pressing block 23 can adapt to PCB boards of various thicknesses, and the slide bar 25 can be buffered by the compression spring;

[0060] When passing through the slitting machine a11, the slitting machine a11 rotates counterclockwise to cut the PCB board. At this time, the PCB board has an upward deformation force, and the air blow tube 13 blows air downward to offset the deformation force of the PCB board, and the burrs generated after slitting are blown to the side close to the grinder 6 through the blowing force. After the PCB board is cut, it continues to move and passes through the grinder 6 to grind the cut out to remove the burrs;

[0061] When passing the rack 43, the rack 43 meshes with the gear 41, and the gear 41 rotates to drive the PCB board to rotate 90°. When passing the slitting machine b12, the slitting machine b12 rotates clockwise to cut the PCB board. At this time, the PCB board has a downward deformation force, and the air blow tube 13 blows air upward to offset the deformation force of the PCB board, and blows the burrs generated after slitting to the side close to the grinder 6 through the blowing force. The cut is polished by the grinder 6 to remove the burrs. After the gas cutting is completed, it continues to move to complete the subsequent process.

[0062] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "front and back", "left and right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the invention.

[0063] Of course, in the present technical solution, those skilled in the art should understand that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0064] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art under the technical prompts of the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A PCB edge material precision cutting system, comprising a frame (1), a conveying component (2), a fixing component (3), a cutting component a (4), a cutting component b (5), a grinder (6), and a switching component (7), characterized in that: The conveying assembly (2) comprises a conveying seat (8) arranged on the frame (1) and a conveying block (9) slidably arranged on the conveying seat (8); a bearing block (10) for bearing a PCB board is rotatably arranged on the conveying block (9); the bearing block (10) is used to convey the PCB board; the fixing assembly (3) is used to fix the PCB board during the conveying process of the bearing block (10); and the slitting assembly a (4) and the slitting assembly b (5) are respectively provided with a slitting machine a (11) and a slitting machine b (12) for slitting the edge material on the PCB board. The switching assembly (7) is used to rotate the PCB board by 90 degrees so that the other two sides can be cut and polished. The rotation directions of the slitting machine a (11) and the slitting machine b (12) are opposite. The slitting machine a (11) and the slitting machine b (12) are both provided with air blow tubes (13) on their sides. The air blow tube (13) corresponding to the slitting machine a (11) blows air from top to bottom, and the air blow tube (13) corresponding to the slitting machine b (12) blows air from bottom to top. The air blow tube (13) is used to cut the PCB board so that the PCB board can be air-blown and stabilized.

2. A PCB edge material precise cutting system according to claim 1, characterized in that: The fixing assembly (3) comprises a fixing rod (21) arranged on the conveying block (9), a slide plate (22) is slidably arranged on the fixing rod (21), a pressing block (23) is arranged on the lower end surface of the slide plate (22), a buffer cylinder (24) is arranged on the upper end surface of the slide plate (22), a sliding rod (25) is slidably arranged in the buffer cylinder (24), a sliding rail (26) for driving the sliding rod (25) to descend is arranged above the moving path of the conveying block (9), a spring sleeved on the fixing rod (21) is arranged between the slide plate (22) and the conveying block (9), and a spring is also arranged on the sliding rod (25) and the inner wall surface of the buffer cylinder (24).

3. A PCB edge material precise cutting system according to claim 1, characterized in that: The slitting assembly a (4) and the slitting assembly b (5) both comprise a side plate (31) arranged on a frame (1) and a motor (32) arranged on the side plate (31); the side plate (31) is provided with a base (33) and a cover plate (34); a threaded rod (35) is provided on the output shaft of the motor (32); a slide table (36) is meshedly provided on the threaded rod (35); the slide table (36) is slidably provided on the base (33); a movable plate (37) is provided on the slide table (36); a fixing member (38) is provided on the movable plate (37); and the slitting machine a (11) and the slitting machine b (12) are clamped on the fixing member (38).

4. A PCB edge material precise cutting system according to claim 1, characterized in that: The switching assembly (7) comprises a gear (41) and a switching block (42) arranged below the bearing block (10); a rack (43) meshing with the gear (41) and a limit bar (44) abutting against the switching block (42) are arranged on the moving path of the conveying block (9).

5. The PCB edge material precision cutting system according to claim 1, characterized in that: The air blowing cylinder (13) is provided with an air pipe (51), and the frame (1) is provided with an air circuit main pipe (52) in communication with the air pipe (51), and one end of the air circuit main pipe (52) is connected to an air pump (53).

6. The PCB edge material precise cutting system according to claim 1, characterized in that: The bearing block (10) is provided with a plurality of clamping blocks (61) that fit with the PCB board.

7. A PCB edge material precise cutting system according to claim 2, characterized in that: The fixing rod (21) is rectangular in shape, and a limiting plate (71) is provided on the upper end surface of the fixing rod (21).

8. The PCB edge material precision cutting system according to claim 2, characterized in that: The lower end of the pressing block (23) is configured to be hemispherical.

9. A PCB edge material precise cutting system according to claim 4, characterized in that: The number of teeth of the gear (41) is 20, and the number of teeth of the rack (43) is 5.

10. The PCB edge material precise cutting system according to claim 4, characterized in that: The limiting strip (44) is disconnected at the rack (43).

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