Circuit board continuous edge trimming device and method with self-positioning function

Abstract

A circuit board continuous edge trimming device with a self-positioning function, relating to the technical field of trimming left and right edge materials of circuit boards, and comprising a workbench (1), a positioning mechanism (2) arranged on the workbench and used for positioning a circuit board, a trimming mechanism (3) arranged directly above the positioning mechanism, and a feeding mechanism (4) arranged on the right side of the positioning mechanism. The positioning mechanism comprises a frame (5) fixedly arranged on the workbench, a rotating shaft (6) rotatably installed in the frame, and a driving motor (7) fixedly arranged on the right side wall of the frame; positioning air cylinders (10) are fixedly arranged at the bottoms of two blind recesses; the acting end of a piston rod of each positioning air cylinder is fixedly provided with a positioning column (11) located in the blind recess; the trimming mechanism comprises a support (12) fixedly arranged on the top surface of the workbench and a trimming oil cylinder (13) fixedly arranged at the top of the support; cutters (15) are welded to two ends of the bottom surface of the lifting / lowering block (14); the inner end surfaces of the two cutters are flush with the left end surface and the right end surface of a positioning platform (9). The device shortens the circuit board edge trimming time, and greatly improves the circuit board edge trimming efficiency. Further provided is a circuit board continuous edge trimming method with a self-positioning function.

Description

Circuit board continuous trimming device and method with self-positioning function

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on January 24, 2024, with application number 202410097654.4 and invention name “Continuous edge trimming device and method for circuit board with self-positioning function”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present invention relates to the technical field of cutting off materials on the left and right sides of a circuit board, in particular to a circuit board continuous edge cutting device and method with a self-positioning function. Background Art

[0003] Trimming a circuit board refers to trimming off the excess material on the left and right sides of the board to obtain a circuit board of the required specifications, making it easier for workers to install the trimmed circuit board into the designated chassis. The method for trimming the left and right sides of a circuit board in the workshop is as follows: the worker first takes a circuit board to be trimmed from the material basket, then fixes the circuit board fixture to the cutting table of the cutting machine, and ensures that the left side of the circuit board is outside the cutting machine's cutter. The cutter is then controlled to move downward, and the cutter cuts off the material on the left side of the circuit board. After cutting, the direction of the circuit board is turned so that the right side of the circuit board is outside the cutting machine's cutter. The cutter is then controlled to move downward, and the cutter cuts off the material on the right side of the circuit board, thus finally obtaining a circuit board of the required specifications.

[0004] However, although this method can cut off the left and right side materials of the circuit board, it still has the following technical defects:

[0005] I. Two cutting actions are required to cut off the left and right edges of the circuit board, which increases the cutting time and reduces the efficiency of circuit board cutting.

[0006] II. Frequent manual adjustments are required to position the circuit board so that the left or right side of the board is positioned directly under the cutter. This operation takes a long time, which in turn increases the time required to trim the board, further reducing the efficiency of the board. Therefore, there is an urgent need for a trimming device and method that significantly shortens the time required to trim the board and significantly improves the efficiency of the board. Summary of the Invention

[0007] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a circuit board continuous trimming device and method with a self-positioning function, which greatly shortens the circuit board trimming time and greatly improves the circuit board trimming efficiency.

[0008] The object of the present invention is achieved by the following technical solution: a continuous edge trimming device for a circuit board with a self-positioning function, comprising a workbench, a positioning mechanism disposed on the workbench and used to position the circuit board, a cutting mechanism disposed directly above the positioning mechanism, and a loading mechanism disposed on the right side of the positioning mechanism;

[0009] The positioning mechanism includes a frame fixed on the workbench, a rotating shaft rotatably installed in the frame, and a driving motor fixed on the right side wall of the frame. The output shaft of the driving motor is connected to one end of the rotating shaft. A support plate is fixed on the rotating shaft, and a positioning platform is welded on the support plate. Two blind grooves are provided on the top surface of the positioning platform. Positioning cylinders are fixed on the bottoms of the two blind grooves. A positioning column located in the blind groove is fixed on the active end of the piston rod of the positioning cylinder.

[0010] The cutting mechanism includes a bracket fixed on the workbench surface, a cutting cylinder fixed on the top of the bracket, a piston rod of the cutting cylinder downwardly penetrating the bracket, and a lifting block fixed on the extended end, and cutters are welded on the bottom surface of the lifting block and at both ends thereof, and the inner end surfaces of the two cutters are flush with the left and right end surfaces of the positioning platform;

[0011] The feeding mechanism includes a feed cylinder fixed on the workbench surface, a connecting block fixed on the acting end of the piston rod of the feed cylinder, and a material basket fixed on the top surface of the connecting block. The top of the material basket is provided with an opening, and the inner cavity of the material basket matches the outer contour of the circuit board. A left through groove and a right through groove are respectively provided on the left and right side walls of the material basket. The bottoms of the left through groove and the right through groove are flush with the bottom wall of the material basket. A pushing cylinder is fixed on the bottom surface of the material basket, and the piston rod of the pushing cylinder extends to the right, and a push plate is fixed on the extended end, and the push plate is opposite to the right through groove on the left and right sides.

[0012] A plurality of supporting legs supported on the ground are fixedly provided on the bottom surface of the workbench.

[0013] The groove heights of the left through groove and the right through groove are equal to the thickness of the circuit board.

[0014] The thickness of the push plate is equal to the thickness of the circuit board.

[0015] A machine platform is fixed on the table top of the workbench, and a cylinder body of the feed oil cylinder is fixed on the table top of the machine platform.

[0016] Inclined plates are welded on the left and right end surfaces of the positioning platform. The inclined plates are arranged to tilt downward. Waste baskets placed on the workbench are arranged on the outer sides of the two inclined plates.

[0017] The trimming device also includes a controller, which is electrically connected to the feeding cylinder, the cutting cylinder, the pushing cylinder, the positioning cylinder and the driving motor via signal lines.

[0018] A continuous edge trimming method for a circuit board with a self-positioning function comprises the following steps:

[0019] S1. A worker takes out a plurality of circuit boards to be trimmed, and drills two positioning holes on the bottom surface of each circuit board, ensuring that the diameter of the positioning holes is equal to the diameter of the positioning posts of the positioning mechanism, and that the horizontal spacing between the two positioning holes is equal to the horizontal spacing between the two positioning posts;

[0020] S2. A worker stacks multiple circuit boards to be trimmed in a basket in advance. The bottommost circuit board is located between the left and right slots.

[0021] S3. The piston rod of the feed cylinder of the feeding mechanism is controlled to move to the left. The piston rod drives the connecting block to move to the left. The connecting block drives the material basket to move to the left. The material basket drives the circuit boards inside it to move to the left. When the piston rod of the feed cylinder is fully extended, the material basket is just close to the positioning table.

[0022] S4. The piston rod of the push cylinder that controls the loading mechanism retracts to the left, and the piston rod drives the push plate to move to the left. After the push plate passes through the right through slot, it pushes the circuit board at the bottom layer in the basket to the left. The circuit board at the bottom layer gradually passes through the left through slot and moves toward the table surface of the positioning table. When the piston rod of the push cylinder is fully retracted, the circuit board is pushed onto the top surface of the positioning table, thus completing the loading of the circuit board.

[0023] S5. After loading, the piston rod of the feed cylinder is controlled to retract to the right, and the piston rod drives the connecting block to move to the right, and the connecting block drives the material basket to move to the right, and the material basket drives the remaining circuit boards therein to move to the right. When the piston rod of the feed cylinder is completely retracted, the piston rod of the push cylinder is controlled to extend to the right, and the piston rod drives the push plate to move to the right. When the push plate withdraws from the material basket, the second to last layer of circuit boards in the material basket falls to the bottom of the basket.

[0024] S6. Positioning of the circuit board on the positioning table: Control the piston rods of the two positioning cylinders to extend upward, and the piston rods drive the positioning posts to move upward. When the piston rods of the two positioning cylinders are fully extended, the two positioning posts are respectively embedded in the two positioning holes of the circuit board, thereby achieving the positioning of the circuit board. At this time, the two cutters are respectively located directly below the left and right materials of the circuit board;

[0025] S7. The piston rod of the cutting cylinder of the cutting mechanism is controlled to move downward, and the piston rod drives the lifting block to move downward, and the lifting block drives the two cutters to move downward. The two cutters cut the left and right edges of the circuit board respectively. After cutting, the finished circuit board that meets the specifications can be processed, and the cut waste material falls into the waste basket along the inclined plate;

[0026] S8. Taking out the finished circuit board: The piston rod of the cutting cylinder is controlled to retract upward, and the piston rod drives the lifting block to move upward, and the lifting block drives the two cutters to move upward. When the cutters are reset, the worker controls the piston rods of the two positioning cylinders to retract downward, and the piston rod drives the positioning column to move downward. The positioning column withdraws from the positioning hole of the finished circuit board. After withdrawal, the worker controls the drive motor to start, and the drive motor drives the rotating shaft to rotate, and the rotating shaft drives the support plate to rotate. The support plate drives the positioning table to flip forward, and the positioning table drives the finished circuit board on it to flip forward. At this time, the finished circuit board on the positioning table slides onto the table surface of the workbench, thereby realizing the removal of the finished circuit board;

[0027] S9. The worker repeats the operations of steps S3 to S8 to continuously cut off the left and right side materials of the circuit board in the material basket, and obtains a plurality of finished circuit boards on the table of the workbench.

[0028] The present invention has the following advantages: greatly shortening the circuit board trimming time and greatly improving the circuit board trimming efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] FIG1 is a schematic structural diagram of the present invention;

[0030] Figure 2 is a schematic structural diagram of a positioning mechanism;

[0031] Figure 3 is a schematic structural diagram of a cutting mechanism;

[0032] Figure 4 is a schematic structural diagram of the feeding mechanism;

[0033] FIG5 is a schematic diagram of processing two positioning holes on a circuit board;

[0034] FIG6 is a bottom view of FIG5;

[0035] FIG7 is a schematic diagram of a worker stacking multiple circuit boards to be trimmed in a material basket in advance;

[0036] FIG8 is a schematic diagram of a material basket approaching a positioning platform;

[0037] FIG9 is a schematic diagram of the completed circuit board loading;

[0038] FIG10 is a schematic diagram of the basket driving the remaining circuit boards therein to move to the right;

[0039] Figure 11 is a schematic diagram of the push plate withdrawing from the basket;

[0040] FIG12 is a schematic diagram of two positioning posts respectively embedded in two positioning holes of a circuit board;

[0041] FIG13 is a partial enlarged view of part I of FIG12;

[0042] FIG14 is a schematic diagram showing two cutters cutting off the left and right side materials of a circuit board respectively;

[0043] FIG15 is a schematic diagram of the rotation of the shaft;

[0044] In the figure, 1-workbench, 2-positioning mechanism, 3-cutting mechanism, 4-loading mechanism, 5-frame, 6-rotating shaft, 7-driving motor, 8-support plate, 9-positioning table, 10-positioning cylinder, 11-positioning column, 12-bracket, 13-cutting cylinder, 14-lifting block, 15-cutter, 16-feed cylinder, 17-connecting block, 18-material basket, 19-left through slot, 20-right through slot, 21-pushing cylinder, 22-push plate, 23-machine table, 24-inclined plate, 25-waste basket, 26-circuit board, 27-positioning hole, 28-finished circuit board. DETAILED DESCRIPTION

[0045] The present invention will be further described below with reference to the accompanying drawings, and the protection scope of the present invention is not limited to the following:

[0046] As shown in Figures 1 to 4, a continuous edge trimming device for circuit boards with a self-positioning function includes a workbench 1, a positioning mechanism 2 arranged on the workbench 1 and used to position the circuit board, a cutting mechanism 3 arranged directly above the positioning mechanism 2, and a loading mechanism 4 arranged on the right side of the positioning mechanism 2; a plurality of support legs supported on the ground are fixedly provided on the bottom surface of the workbench 1.

[0047] The positioning mechanism 2 includes a frame 5 fixed on the workbench 1, a rotating shaft 6 rotatably installed in the frame 5, and a driving motor 7 fixed on the right side wall of the frame 5. The output shaft of the driving motor 7 is connected to one end of the rotating shaft 6. A support plate 8 is fixed on the rotating shaft 6, and a positioning platform 9 is welded on the support plate 8. Two blind grooves are provided on the top surface of the positioning platform 9. The bottom of the two blind grooves are fixed with a positioning cylinder 10. The active end of the piston rod of the positioning cylinder 10 is fixed with a positioning column 11 located in the blind groove.

[0048] The cutting mechanism 3 includes a bracket 12 fixed on the workbench 1, a cutting cylinder 13 fixed on the top of the bracket 12, a piston rod of the cutting cylinder 13 downwardly penetrating the bracket 12, and a lifting block 14 fixed on the extended end, and cutters 15 are welded on the bottom surface of the lifting block 14 and at both ends thereof, and the inner end surfaces of the two cutters 15 are flush with the left and right end surfaces of the positioning platform 9;

[0049] The feeding mechanism 4 includes a feed cylinder 16 fixed on the surface of the workbench 1, a connecting block 17 fixed on the acting end of the piston rod of the feed cylinder 16, and a material basket 18 fixed on the top surface of the connecting block 17. The top of the material basket 18 is provided with an opening, and the inner cavity of the material basket 18 matches the outer contour of the circuit board. A left through groove 19 and a right through groove 20 are respectively provided on the left and right side walls of the material basket 18. The groove height of the left through groove 19 and the right through groove 20 is equal to the thickness of the circuit board, and the groove bottoms of the left through groove 19 and the right through groove 20 are both flush with the bottom wall of the material basket 18. A pushing cylinder 21 is fixed on the bottom surface of the material basket 18, and the piston rod of the pushing cylinder 21 extends to the right, and a push plate 22 is fixed on the extended end. The push plate 22 is opposite to the right through groove 20 on the left and right sides, and the thickness of the push plate 22 is equal to the thickness of the circuit board.

[0050] A machine table 23 is fixed on the table top of the workbench 1, and the cylinder body of the feed oil cylinder 16 is fixed on the table top of the machine table 23. Inclined plates 24 are welded to the left and right end surfaces of the positioning table 9, and the inclined plates 24 are arranged to be tilted downward. The outer sides of the two inclined plates 24 are provided with waste baskets 25 placed on the workbench 1.

[0051] The trimming device also includes a controller, which is electrically connected to the feed cylinder 16, the cutting cylinder 13, the pushing cylinder 21, the positioning cylinder 10 and the drive motor 7 via a signal line. The controller can control the extension or retraction of the piston rods of the feed cylinder 16, the cutting cylinder 13, the pushing cylinder 21 and the positioning cylinder 10, and can also control the start or shut down of the drive motor 7, which facilitates the operation of workers and has the characteristics of a high degree of automation.

[0052] A continuous edge trimming method for a circuit board with a self-positioning function comprises the following steps:

[0053] S1. A worker takes out a plurality of circuit boards 26 to be trimmed, and drills two positioning holes 27 on the bottom surface of each circuit board 26, as shown in FIG5 and FIG6 , ensuring that the diameter of the positioning holes 27 is equal to the diameter of the positioning posts 11 of the positioning mechanism 2, and that the horizontal spacing between the two positioning holes 27 is equal to the horizontal spacing between the two positioning posts 11;

[0054] S2. A worker stacks a plurality of circuit boards 26 to be trimmed in the material basket 18 in advance. As shown in FIG7 , the circuit boards 26 on the bottom layer are located between the left through slot 19 and the right through slot 20 .

[0055] S3. The piston rod of the feed cylinder 16 of the feeding mechanism 4 is controlled to move to the left. The piston rod drives the connecting block 17 to move to the left. The connecting block 17 drives the material basket 18 to move to the left. The material basket 18 drives the circuit boards 26 therein to move to the left. When the piston rod of the feed cylinder 16 is fully extended, the material basket 18 is just close to the positioning table 9, as shown in FIG8 .

[0056] S4, the piston rod of the pushing cylinder 21 of the control loading mechanism 4 is retracted to the left, and the piston rod drives the push plate 22 to move to the left. After the push plate 22 passes through the right through slot 20, it pushes the circuit board 26 at the bottom layer in the material basket 18 to the left. The circuit board 26 at the bottom layer gradually passes through the left through slot 19 and moves toward the table surface of the positioning table 9. When the piston rod of the pushing cylinder 21 is fully retracted, the circuit board 26 is just pushed onto the top surface of the positioning table 9, thereby completing the loading of the circuit board 26, as shown in Figure 9;

[0057] S5. After loading, the piston rod of the feed cylinder 16 is controlled to retract to the right, and the piston rod drives the connecting block 17 to move to the right. The connecting block 17 drives the material basket 18 to move to the right, and the material basket 18 drives the remaining circuit boards 26 therein to move to the right, as shown in FIG10 . When the piston rod of the feed cylinder 16 is completely retracted, the piston rod of the push cylinder 21 is controlled to extend to the right, and the piston rod drives the push plate 22 to move to the right. When the push plate 22 withdraws from the material basket 18, as shown in FIG11 , the penultimate layer of circuit boards 26 in the material basket 18 falls to the bottom of the basket 18.

[0058] S6. Positioning the circuit board 26 on the positioning platform 9: The piston rods of the two positioning cylinders 10 are controlled to extend upward, and the piston rods drive the positioning posts 11 to move upward. When the piston rods of the two positioning cylinders 10 are fully extended, the two positioning posts 11 are respectively embedded in the two positioning holes 27 of the circuit board 26, as shown in Figures 12 and 13, thereby achieving the positioning of the circuit board 26. At this time, the two cutters 15 are respectively located directly below the left and right materials of the circuit board 26;

[0059] S7, the piston rod of the cutting cylinder 13 of the cutting mechanism 3 moves downward, the piston rod drives the lifting block 14 to move downward, and the lifting block 14 drives the two cutters 15 to move downward. The two cutters 15 cut off the left and right edges of the circuit board 26 respectively, as shown in Figure 14. After cutting, a finished circuit board 28 that meets the specifications can be processed, and the cut waste material falls into the waste basket 25 along the inclined plate 24;

[0060] Among them, in step S6, after the circuit board 26 is positioned on the positioning table 9, the two cutters 15 are respectively located directly below the left and right side materials of the circuit board 26. Therefore, compared with the cutting method in the workshop, there is no need to manually adjust the position of the circuit board 26 frequently, and the left and right side materials of the circuit board 26 can be quickly positioned directly below the two cutters 15, thereby greatly shortening the cutting time of the circuit board and greatly improving the cutting efficiency of the circuit board.

[0061] In addition, in step S7, the worker only needs to control the piston rod of the cutting cylinder 13 to extend downward, and the left and right edges of the circuit board 26 positioned on the positioning table 9 can be cut off at the same time by the two cutters 15. There is no need to cut the left and right edges of the circuit board 26 in two steps, thereby greatly shortening the cutting time of a single circuit board 26 and greatly improving the cutting efficiency of the circuit board.

[0062] S8. Taking out the finished circuit board 28: Control the piston rod of the cutting cylinder 13 to retract upward, and the piston rod drives the lifting block 14 to move upward, and the lifting block 14 drives the two cutters 15 to move upward. When the cutter 15 is reset, the worker controls the piston rods of the two positioning cylinders 10 to retract downward, and the piston rod drives the positioning column 11 to move downward, and the positioning column 11 withdraws from the positioning hole 27 of the finished circuit board 28. After withdrawing, the worker controls the drive motor 7 to start, and the drive motor 7 drives the rotating shaft 6 to rotate. The rotation direction of the rotating shaft 6 is shown in Figure 15. The rotating shaft 6 drives the support plate 8 to rotate, and the support plate 8 drives the positioning table 9 to flip forward. The positioning table 9 drives the finished circuit board 28 thereon to flip forward. At this time, the finished circuit board 28 on the positioning table 9 slides onto the table surface of the workbench 1, thereby realizing the taking out of the finished circuit board 28;

[0063] S9 , the worker repeats the operations of steps S3 to S8 to continuously cut off the left and right side materials of the circuit board 26 in the material basket 18 , and obtains a plurality of finished circuit boards 28 on the table surface of the workbench 1 .

[0064] It can be seen from this that the cutting device can automatically push the circuit boards 26 in the material basket 18 to the positioning table 9, without the need for manual labor to take the circuit boards 26 from the material basket one by one for cutting. It can achieve the cutting of the left and right side materials of multiple circuit boards 26 in a short time, further improving the cutting efficiency of the circuit boards 26.

[0065] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A continuous edge trimming device for a circuit board with a self-positioning function, characterized in that: It includes a workbench (1), a positioning mechanism (2) arranged on the workbench (1) and used for positioning the circuit board, a cutting mechanism (3) arranged directly above the positioning mechanism (2), and a loading mechanism (4) arranged on the right side of the positioning mechanism (2); The positioning mechanism (2) includes a frame (5) fixed on the workbench (1), a rotating shaft (6) rotatably installed in the frame (5), and a driving motor (7) fixed on the right side wall of the frame (5). The output shaft of the driving motor (7) is connected to one end of the rotating shaft (6). A support plate (8) is fixed on the rotating shaft (6), a positioning table (9) is welded on the support plate (8), two blind slots are opened on the top surface of the positioning table (9), positioning cylinders (10) are fixed at the bottom of the two blind slots, and positioning columns (11) located in the blind slots are fixed on the acting ends of the piston rods of the positioning cylinders (10); The cutting mechanism (3) includes a bracket (12) fixed on the tabletop of the workbench (1), and a cutting oil cylinder (13) fixed on the top of the bracket (12). The piston rod of the cutting oil cylinder (13) penetrates downward through the bracket (12), and a lifting block (14) is fixed on the extending end. Cutting knives (15) are welded on the bottom surface of the lifting block (14) and at both ends thereof. The inner end faces of the two cutting knives (15) are flush with the left and right end faces of the positioning table (9); The loading mechanism (4) includes a feeding oil cylinder (16) fixed on the tabletop of the workbench (1), a connecting block (17) fixed on the acting end of the piston rod of the feeding oil cylinder (16), and a material basket (18) fixed on the top surface of the connecting block (17). An opening is opened at the top of the material basket (18). The inner cavity of the material basket (18) is matched with the outer contour of the circuit board. Left through slots (19) and right through slots (20) are respectively opened on the left and right side walls of the material basket (18). The bottoms of the left through slots (19) and the right through slots (20) are flush with the bottom wall of the material basket (18). A pushing cylinder (21) is fixed on the bottom surface of the material basket (18). The piston rod of the pushing cylinder (21) extends to the right, and a pushing plate (22) is fixed on the extending end. The pushing plate (22) is opposite to the right through slot (20) left and right.

2. The continuous edge trimming device for a circuit board with a self-positioning function according to claim 1, characterized in that: Multiple support legs that support on the ground are fixed on the bottom surface of the workbench (1).

3. The continuous edge trimming device for circuit boards with self-positioning function according to claim 2, characterized in that: The slot heights of the left through slot (19) and the right through slot (20) are equal to the thickness of the circuit board.

4. The continuous edge trimming device for a circuit board with a self-positioning function according to claim 3, characterized in that: The thickness of the pushing plate (22) is equal to the thickness of the circuit board.

5. The continuous edge trimming device for a circuit board with a self-positioning function according to claim 4, characterized in that: A machine platform (23) is fixed on the tabletop of the workbench (1), and the cylinder body of the feeding oil cylinder (16) is fixed on the tabletop of the machine platform (23).

6. The continuous edge trimming device for circuit boards with self-positioning function according to claim 5, characterized in that: Slant plates (24) are welded on the left and right end faces of the positioning table (9). The slant plates (24) are arranged to slope downward. Waste baskets (25) placed on the workbench (1) are arranged outside both of the two slant plates (24).

7. The continuous trimming device for circuit boards with self-positioning function according to claim 6, characterized in that: This edge trimming device further includes a controller, and the controller is electrically connected to the feeding oil cylinder (16), the cutting oil cylinder (13), the pushing cylinder (21), the positioning cylinder (10), and the driving motor (7) via signal lines.

8. A continuous trimming method for a circuit board with a self-positioning function, using the continuous trimming device for a circuit board with a self-positioning function described in claim 7, characterized in that: It includes the following steps: S1. Workers take out multiple circuit boards (26) to be trimmed at the edges, and drill two positioning holes (27) on the bottom surface of each circuit board (26), ensuring that the diameter of the positioning holes (27) is equal to the diameter of the positioning posts (11) of the positioning mechanism (2), and at the same time ensuring that the horizontal distance between the two positioning holes (27) is equal to the horizontal distance between the two positioning posts (11); S2. Workers stack multiple circuit boards (26) to be trimmed at the edges in the material basket (18) in sequence in advance. At this time, the bottommost circuit board (26) is just located between the left through slot (19) and the right through slot (20); S3. Control the piston rod of the feed oil cylinder (16) of the feeding mechanism (4) to move leftward. The piston rod drives the connecting block (17) to move leftward. The connecting block (17) drives the material basket (18) to move leftward. The material basket (18) drives the respective circuit boards (26) therein to move leftward. When the piston rod of the feed oil cylinder (16) is fully extended, the material basket (18) just approaches the positioning table (9); S4. Control the piston rod of the push cylinder (21) of the feeding mechanism (4) to retract leftward. The piston rod drives the push plate (22) to move leftward. After the push plate (22) penetrates into the right through slot (20), it pushes the bottommost circuit board (26) in the material basket (18) leftward. The bottommost circuit board (26) gradually passes through the left through slot (19) and moves towards the top surface direction of the positioning table (9). When the piston rod of the push cylinder (21) is fully retracted, this circuit board (26) is just pushed onto the top surface of the positioning table (9), thus completing the feeding of the circuit board (26); S5. After feeding, control the piston rod of the feed oil cylinder (16) to retract rightward. The piston rod drives the connecting block (17) to move rightward. The connecting block (17) drives the material basket (18) to move rightward. The material basket (18) drives the remaining circuit boards (26) therein to move rightward. When the piston rod of the feed oil cylinder (16) is fully retracted, control the piston rod of the push cylinder (21) to extend rightward. The piston rod drives the push plate (22) to move rightward. After the push plate (22) exits from the material basket (18), the second - bottom - layer circuit board (26) in the material basket (18) falls to the bottom of the material basket (18); S6. Positioning of the circuit board (26) on the positioning table (9): Control the piston rods of the two positioning cylinders (10) to extend upward. The piston rods drive the positioning posts (11) to move upward. When the piston rods of the two positioning cylinders (10) are fully extended, the two positioning posts (11) are respectively inserted into the two positioning holes (27) of the circuit board (26), thus realizing the positioning of the circuit board (26). At this time, the two cutting knives (15) are respectively located directly below the left and right edge materials of the circuit board (26); S7. Control the piston rod of the cutting oil cylinder (13) of the cutting mechanism (3) to move downward. The piston rod drives the lifting block (14) to move downward, and the lifting block (14) drives the two cutting knives (15) to move downward. The two cutting knives (15) respectively cut off the left and right side materials of the circuit board (26). After cutting, a finished circuit board (28) meeting the specifications can be processed, and the cut waste edge materials fall into the waste basket (25) along the inclined plate (24); S8. Removal of the finished circuit board (28): Control the piston rod of the cutting oil cylinder (13) to retract upward. The piston rod drives the lifting block (14) to move upward, and the lifting block (14) drives the two cutting knives (15) to move upward. After the cutting knives (15) are reset, the worker controls the piston rods of the two positioning cylinders (10) to retract downward. The piston rods drive the positioning columns (11) to move downward, and the positioning columns (11) withdraw from the positioning holes (27) of the finished circuit board (28). After withdrawal, the worker controls the driving motor (7) to start. The driving motor (7) drives the rotating shaft (6) to rotate, the rotating shaft (6) drives the support plate (8) to rotate, the support plate (8) drives the positioning table (9) to turn forward, and the positioning table (9) drives the finished circuit board (28) thereon to turn forward. At this time, the finished circuit board (28) on the positioning table (9) slides onto the tabletop of the workbench (1), thus realizing the removal of the finished circuit board (28); S9. The worker repeats the operations in steps S3 to S8, and can continuously cut off the left and right side materials of the circuit board (26) in the material basket (18) and obtain multiple finished circuit boards (28) on the tabletop of the workbench (1).

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