Large-sized-substrate cutting device and method for circuit board production

Abstract

A large-sized-substrate cutting device and method for circuit board production, which device and method relate to the technical field of cutting large-sized substrates. A horizontally arranged double-acting oil cylinder (5) is fixedly provided on a backing plate (3), and a limiting groove (9) penetrating left and right end faces of each limiting base (8) is provided in each limiting base (8); two feeding and cutting mechanisms (11) respectively corresponding to cutter holders (7) are provided on a cross beam of a gantry (4), the feeding and cutting mechanism (11) located on the left side comprises a cutting oil cylinder (12) fixedly arranged on the top surface of the cross beam of the gantry (4), and a fixed plate (13) fixedly arranged on the bottom surface of the cross beam and located on the right side of the cutting oil cylinder (12), a piston rod of the cutting oil cylinder (12) downwardly penetrates the cross beam, and a cutter (14) is fixedly provided at an extension end; and a cutting-off oil cylinder (19) is fixedly provided on the top surface of the cross beam of the gantry (4) and between the two feeding and cutting mechanisms (11), a piston rod of the cutting-off oil cylinder (19) penetrates the cross beam, and a cutting-off cutter (20) is fixedly provided at an extension end. The device and method greatly shorten the cutting time for large-sized substrates, greatly improve the cutting efficiency for large-sized substrates, and have a high degree of automation.

Description

Large-size substrate cutting device and method for circuit board production

[0001] This application claims priority to a Chinese patent application filed with the Patent Office of China on January 30, 2024, with application number 202410124435.0 and invention name “A large-size substrate cutting device and method for circuit board production”, 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 large-size substrates, and in particular to a device and method for cutting large-size substrates for circuit board production. Background Art

[0003] When the structure of a large-size substrate 1 is shown in Figures 1 and 2, after the large-size substrate 1 is produced and formed, the process requires that it be gradually cut along the length direction of the large-size substrate 1. The cutting position is shown by the dotted line in Figure 2. After cutting, a strip substrate 2 as shown in Figures 3 and 4 is obtained. This strip substrate 2 is mainly used for circuit boards installed in a chassis.

[0004] In the workshop, workers cut the large-sized substrate 1 into multiple strip substrates 2 in the following way:

[0005] S1. A worker takes out a large-sized substrate 1 and then marks a plurality of cutting lines on the top surface of the large-sized substrate 1 along its length direction;

[0006] S2. The worker positions the rightmost cutting line directly below the cutting blade of the cutting machine, and then controls the cutting blade of the cutting machine to move downward. The cutting blade cuts downward along the first cutting line. After cutting, a first strip substrate 2 is obtained. The structure of the obtained strip substrate 2 is shown in Figures 3 and 4.

[0007] S3. The worker positions the second cutting line of the large-size substrate 1 directly below the cutter, and then controls the cutter of the cutting machine to move downward. The cutter cuts downward along the second cutting line, and after cutting, a second strip substrate 2 is obtained.

[0008] S4, repeating step S3 multiple times, the large-size substrate 1 can be cut into multiple strip-shaped substrates 2;

[0009] S5 , the worker repeats the operations of steps S1 to S4 to continuously cut multiple large-size substrates 1 .

[0010] However, although the method in the workshop can cut the large-sized substrate 1, in actual operation, the following technical defects still exist:

[0011] I. In step S1 , a plurality of cutting lines need to be drawn on the top surface of the large-size substrate 1 in advance. However, the drawing process increases the cutting time of the large-size substrate 1 , thereby reducing the cutting efficiency of the large-size substrate 1 .

[0012] II. There are multiple cutting lines on the large-size substrate 1, and the cutter can only cut along the cutting lines one by one, which undoubtedly increases the cutting time of the entire large-size substrate 1 and further reduces the cutting efficiency of the large-size substrate 1.

[0013] Therefore, there is an urgent need for a cutting device and method that can greatly shorten the cutting time of large-size substrates and greatly improve the cutting efficiency of large-size substrates. Summary of the Invention

[0014] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a large-size substrate cutting device and method for circuit board production that greatly shortens the cutting time of large-size substrates, greatly improves the cutting efficiency of large-size substrates, and has a high degree of automation.

[0015] The objectives of the present invention are achieved through the following technical solutions: A large-size substrate cutting device for circuit board production, comprising a gantry fixed to a pad, characterized in that a horizontally arranged double-acting oil cylinder is fixed to the pad, connecting blocks are fixed to the two piston rods of the double-acting oil cylinder, knife holders are fixed to the two connecting blocks, limit seats are fixed to the top surfaces of the two knife holders, and limit slots are provided in the limit seats that pass through the left and right end surfaces thereof, the slot height of the limit slot is equal to the thickness of the large-size substrate, the longitudinal width of the limit slot is equal to the longitudinal width of the large-size substrate, and a gap is left between the inner end surfaces of the two knife holders;

[0016] Two feeding and cutting mechanisms corresponding to the knife seats are provided on the crossbeam of the gantry, and the feeding and cutting mechanism located on the left side includes a cutting cylinder fixed on the top surface of the crossbeam of the gantry, a fixed plate fixed on the bottom surface of the crossbeam and located on the right side of the cutting cylinder, the piston rod of the cutting cylinder passes through the crossbeam downward, and a cutter is fixed on the extended end, a horizontally arranged feeding cylinder is fixed on the right end surface of the fixed plate, a rotating cylinder is fixed on the active end of the piston rod of the feeding cylinder, a rotating plate is fixed on the rotating axis of the rotating cylinder, the rotating plate extends upward above the rotating cylinder, and a push rod is fixed on the extended end;

[0017] A cutting oil cylinder is fixedly provided on the top surface of the gantry beam and between the two feeding and cutting mechanisms. The piston rod of the cutting oil cylinder passes through the beam, and a cutting knife is fixedly provided on the extending end. The cutting knife is arranged just above the gap.

[0018] The horizontal width of the gap is equal to the thickness of the cutting blade.

[0019] The two tool holders are symmetrically arranged about the double-acting cylinder.

[0020] The two feeding and cutting mechanisms are symmetrically arranged with respect to the cutting oil cylinder.

[0021] A mounting plate is fixed on the active end of the piston rod of the feed cylinder, and the cylinder barrel of the rotary cylinder is fixed on the right end surface of the mounting plate.

[0022] The rotating cylinder, the feeding cylinder and the mounting plate are located on the same straight line.

[0023] A connecting seat is fixed on the active end of the piston rod of the cutting oil cylinder, and the cutting knife is fixed on the bottom surface of the connecting seat.

[0024] The device also includes a controller, which is electrically connected to the double-acting oil cylinder, the cut-off oil cylinder, the feed cylinder and the rotating cylinder via signal lines.

[0025] A method for cutting large-size substrates for circuit board production comprises the following steps:

[0026] S1. A worker takes out a large-size substrate and passes it through the right and left limit slots from right to left. The left and right ends of the large-size substrate are supported on two knife blocks, respectively, while ensuring that the center line of the large-size substrate is directly below the cutting knife, thus completing the installation of the large-size substrate.

[0027] S2. Control the piston rod of the cutting oil cylinder to extend downward, and the piston rod drives the connecting seat to move downward, and the connecting seat drives the cutting knife to move downward, and the cutting knife moves toward the center line of the large-size substrate. When the cutting knife matches the gap, the cutting knife cuts the large-size substrate along the center line. After cutting, the left half and the right half of the large-size substrate are obtained in the two limiting grooves respectively;

[0028] S3. Control the piston rod of the cutting cylinder to retract upward, and the piston rod drives the cutting knife to move upward. Then control the two piston rods of the double-acting cylinder to extend outward. The two piston rods respectively drive the two connecting blocks to move outward. The two connecting blocks respectively drive the two knife holders to move outward. Among them, the left knife holder drives the left half of the large-size substrate to move leftward.

[0029] At the same time, the knife holder on the right drives the right half of the large-size substrate to move to the right. When the two piston rods of the double-acting cylinder are fully extended, the left half and the right half of the large-size substrate respectively enter the cutting station of the feeding and cutting mechanism. At this time, the outer end faces of the two knife holders are flush with the inner end faces of the cutters of the two feeding and cutting mechanisms respectively.

[0030] S4. The piston rods of the cutting cylinders controlling the two feeding and cutting mechanisms extend downward, driving the cutters downward. The two cutters move toward the outer extensions of the left and right halves of the large-size substrate, respectively. When the inner end faces of the two cutters engage with the outer end faces of the two knife holders, the two cutters cut off the outer extensions of the left and right halves of the large-size substrate, respectively, thereby obtaining two strip-shaped substrates.

[0031] S5, the piston rods of the cutting oil cylinders that control the two feeding and cutting mechanisms are retracted upward, and the piston rods drive the cutter to move upward to prepare for the second cutting;

[0032] S6. Control the rotation shafts of the two feeding and cutting mechanism rotary cylinders to rotate. The rotation shafts drive the rotary plate to move downward, and the rotary plate drives the push rods to rotate downward. When the two push rods rotate downward 180 degrees, the controller controls the two feeding and cutting mechanism rotary cylinders to close. At this time, the push rod on the left is opposite to the left half of the large-size substrate, and the push rod on the right is opposite to the right half of the large-size substrate.

[0033] S7. Control the piston rods of the feed cylinders of the two feeding and cutting mechanisms to retract, and the piston rods drive the mounting plate connected thereto to move outward, and the mounting plate drives the rotating cylinder connected thereto to move outward, and the rotating cylinder drives the rotating plate and the push rod to move outward synchronously. During the movement, the push rod on the left pushes the left half of the large-size substrate to the left, and at the same time, the push rod on the right pushes the right half of the large-size substrate to the right, so that the outer ends of the left half and the right half of the large-size substrate extend to the outside of the knife holder. When the piston rods of the feed cylinders are retracted to the set stroke, the controller controls the feed cylinders to close;

[0034] S8, repeating the operation of step S4, the two cutters cut off the outer extensions of the left half of the large-size substrate and the right half of the large-size substrate respectively, thereby obtaining two strip substrates again;

[0035] S9. The worker repeats steps S7 to S8 for multiple times to gradually cut the left half of the large-size substrate and the right half of the large-size substrate into the required strip substrates.

[0036] The present invention has the following advantages: greatly shortening the cutting time of large-size substrates, greatly improving the cutting efficiency of large-size substrates, and having a high degree of automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] FIG1 is a schematic structural diagram of a large-size substrate;

[0038] FIG2 is a top view of FIG1 ;

[0039] FIG3 is a schematic structural diagram of a strip substrate;

[0040] FIG4 is a top view of FIG3 ;

[0041] FIG5 is a schematic structural diagram of the present invention;

[0042] FIG6 is a main cross-sectional schematic diagram of FIG5 ;

[0043] Figure 7 is a schematic diagram of the connection between the double-acting cylinder, the tool holder and the limit seat;

[0044] Figure 8 is a schematic diagram of the connection between the knife seat and the limit seat;

[0045] FIG9 is an isometric view of FIG8 ;

[0046] Figure 10 is a schematic structural diagram of the feeding and cutting mechanism on the left side;

[0047] Figure 11 is a schematic diagram of the connection between the cutting cylinder and the cutting knife;

[0048] FIG12 is a schematic diagram of a large-size substrate installed;

[0049] FIG13 is a schematic diagram of a cutting blade cutting a large-sized substrate along its center line;

[0050] FIG14 is a schematic diagram showing the left side of the tool holder driving the left half of the large-size substrate to move leftward;

[0051] FIG15 is a schematic diagram showing two cutters cutting off the outer extensions of the left half and the right half of the large-size substrate respectively;

[0052] FIG16 is a schematic diagram of the rotating plate driving the push rod to rotate downward;

[0053] FIG17 is a schematic diagram showing the push rod on the left pushing the left half of the large-size substrate to the left;

[0054] FIG18 is a schematic diagram showing two cutters cutting off the outer extensions of the left half and the right half of the large-size substrate respectively;

[0055] In the figure: 1-large-size substrate, 2-strip substrate, 3-backing plate, 4-gantry, 5-double-acting cylinder, 6-connecting block, 7-knife holder, 8-limiting seat, 9-limiting groove, 10-gap; 11-feeding and cutting mechanism, 12-cutting cylinder, 13-fixed plate, 14-cutter, 15-feeding cylinder, 16-rotating cylinder, 17-rotating plate, 18-push rod; 19-cutting cylinder, 20-cutting knife, 21-left half of large-size substrate, 22-right half of large-size substrate. DETAILED DESCRIPTION

[0056] 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:

[0057] As shown in Figures 5 to 11, a large-size substrate cutting device for circuit board production includes a gantry 4 fixedly mounted on a pad 3, characterized in that: a horizontally arranged double-acting cylinder 5 is fixedly mounted on the pad 3, and connecting blocks 6 are fixedly mounted on the two piston rods of the double-acting cylinder 5, and a knife holder 7 is fixedly mounted on the two connecting blocks 6. The two knife holders 7 are symmetrically arranged about the double-acting cylinder 5, and a limiting seat 8 is fixedly mounted on the top surface of the two knife holders 7. A limiting groove 9 is provided in the limiting seat 8 and passes through the left and right end faces thereof. The groove height of the limiting groove 9 is equal to the thickness of the large-size substrate 1, and the longitudinal width of the limiting groove 9 is equal to the longitudinal width of the large-size substrate 1. A gap 10 is left between the inner end faces of the two knife holders 7, and the horizontal width of the gap 10 is equal to the thickness of the cutting knife 20.

[0058] The crossbeam of the gantry 4 is provided with two feeding and cutting mechanisms 11 corresponding to the knife seat 7 respectively. The two feeding and cutting mechanisms 11 are symmetrically arranged about the cutting oil cylinder 19. The feeding and cutting mechanism 11 on the left side includes a cutting oil cylinder 12 fixed on the top surface of the crossbeam of the gantry 4, a fixing plate 13 fixed on the bottom surface of the crossbeam and located on the right side of the cutting oil cylinder 12, the piston rod of the cutting oil cylinder 12 passes through the crossbeam downward, and a cutter 14 is fixed on the extending end. The right end surface of the fixing plate 13 A horizontally arranged feed cylinder 15 is fixed on it, and a rotating cylinder 16 is fixed on the active end of the piston rod of the feed cylinder 15. A rotating plate 17 is fixed on the rotating axis of the rotating cylinder 16. The rotating plate 17 extends upward above the rotating cylinder 16, and a push rod 18 is fixed on the extended end; a mounting plate is fixed on the active end of the piston rod of the feed cylinder 15, and the cylinder barrel of the rotating cylinder 16 is fixed on the right end surface of the mounting plate, and the rotating cylinder 16, the feed cylinder 15 and the mounting plate are in the same straight line.

[0059] A cutting cylinder 19 is fixedly provided on the top surface of the crossbeam of the gantry 4 and between the two feeding and cutting mechanisms 11. The piston rod of the cutting cylinder 19 passes through the crossbeam, and a cutting knife 20 is fixedly provided on the extended end. The cutting knife 20 is arranged directly above the gap 10. A connecting seat is fixedly provided on the active end of the piston rod of the cutting cylinder 19, and the cutting knife 20 is fixedly provided on the bottom surface of the connecting seat.

[0060] The device further comprises a controller, which is electrically connected to the double-acting cylinder 5, the shut-off cylinder 19, the feed cylinder 15 and the rotary cylinder 16 via signal lines.

[0061] A method for cutting large-size substrates for circuit board production comprises the following steps:

[0062] S1. A worker takes out a large-size substrate 1 as shown in Figures 1 and 2, passes the large-size substrate 1 through the right and left limiting slots 9 from right to left, and supports the left and right ends of the large-size substrate 1 on two knife seats 7, respectively, while ensuring that the center line of the large-size substrate 1 is directly below the cutting knife 20, thereby completing the installation of the large-size substrate 1, as shown in Figure 12;

[0063] S2. Control the piston rod of the cutting oil cylinder 19 to extend downward, and the piston rod drives the connecting seat to move downward, and the connecting seat drives the cutting knife 20 to move downward. The cutting knife 20 moves toward the center line of the large-size substrate 1. When the cutting knife 20 matches the gap, the cutting knife 20 cuts the large-size substrate 1 along the center line. As shown in FIG13, after cutting, a left half 21 of a large-size substrate and a right half 22 of a large-size substrate are obtained in the two limiting grooves 9 respectively.

[0064] S3. Control the piston rod of the cutting cylinder 19 to retract upward, and the piston rod drives the cutting knife 20 to move upward. Then, control the two piston rods of the double-acting cylinder 5 to extend outward, and the two piston rods respectively drive the two connecting blocks 6 to move outward. The two connecting blocks 6 respectively drive the two knife holders 7 to move outward. Among them, the left knife holder 7 drives the left half 21 of the large-size substrate to move leftward, as shown in Figure 14;

[0065] At the same time, the knife holder 7 on the right drives the right half 22 of the large-size substrate to move to the right. As shown in FIG14 , when the two piston rods of the double-acting oil cylinder 5 are fully extended, the left half 21 and the right half 22 of the large-size substrate respectively enter the cutting station of the feeding and cutting mechanism 11. At this time, the outer end surfaces of the two knife holders 7 are respectively flush with the inner end surfaces of the cutters 14 of the two feeding and cutting mechanisms 11.

[0066] S4. The piston rods of the cutting cylinders 12 controlling the two feeding and cutting mechanisms 11 extend downward, and the piston rods drive the cutters 14 to move downward. The two cutters 14 move toward the outer extensions of the left half 21 and the right half 22 of the large-size substrate, respectively. When the inner end surfaces of the two cutters 14 respectively match the outer end surfaces of the two knife holders 7, the two cutters 14 cut off the outer extensions of the left half 21 and the right half 22 of the large-size substrate, respectively, as shown in FIG15 , thereby obtaining two strip substrates 2. The structure of the strip substrate 2 is shown in FIG3 and FIG4 .

[0067] S5, control the piston rods of the cutting cylinders 12 of the two feeding and cutting mechanisms 11 to retract upward, and the piston rods drive the cutter 14 to move upward, in preparation for the second cutting;

[0068] S6. Control the rotation shafts of the rotary cylinders 16 of the two feeding and cutting mechanisms 11 to rotate. The rotary shafts drive the rotary plate 17 to move downward, and the rotary plate 17 drives the push rods 18 to rotate downward. As shown in FIG16 , after the two push rods 18 rotate downward 180°, the controller controls the rotary cylinders 16 of the two feeding and cutting mechanisms 11 to close. At this time, the push rod 18 on the left is opposite to the left half 21 of the large-size substrate, and the push rod 18 on the right is opposite to the right half 22 of the large-size substrate.

[0069] S7, control the piston rods of the feed cylinders 15 of the two feeding and cutting mechanisms 11 to retract, the piston rods drive the mounting plate connected thereto to move outward, the mounting plate drives the rotating cylinder 16 connected thereto to move outward, the rotating cylinder 16 drives the rotating plate 17 and the push rod 18 to move outward synchronously, during the movement, the push rod 18 on the left pushes the left half 21 of the large-size substrate to the left, as shown in FIG17 , while the push rod 18 on the right pushes the right half 22 of the large-size substrate to the right, so that the outer ends of the left half 21 and the right half 22 of the large-size substrate extend to the outside of the knife holder 7, when the piston rod of the feed cylinder 15 retracts to the set stroke, the controller controls the feed cylinder 15 to close;

[0070] S8, repeating the operation of step S4, the two cutters 14 again cut off the outer extensions of the left half 21 and the right half 22 of the large-size substrate, as shown in FIG18 , thereby obtaining two strip substrates 2 again;

[0071] S9 , the worker repeats steps S7 to S8 multiple times to gradually cut the left half 21 and the right half 22 of the large-size substrate into the required strip-shaped substrates 2 .

[0072] As can be seen from steps S2 to S9, the present apparatus first cuts the middle portion of the large-size substrate 1 to obtain a large-size substrate left half 21 and a large-size substrate right half 22. The two feeding and cutting mechanisms 11 then simultaneously cut the large-size substrate left half 21 and the large-size substrate right half 22, respectively. Thus, in a single cutting operation, two strip-shaped substrates 2 are obtained. Therefore, compared to the gradual cutting method used in a workshop, the present apparatus significantly shortens the cutting time for large-size substrates, thereby significantly improving the efficiency of cutting large-size substrates.

[0073] In addition, before cutting, there is no need to manually draw cutting lines on the top surface of the large-size substrate 1 in advance. Instead, the cutting action is performed automatically by cooperating with the cutting cylinder 19, the cutting cylinder 12 of the feed and cutting mechanism 11, the feed cylinder 15 and the rotating cylinder 16, thereby further shortening the cutting time of the large-size substrate and greatly improving the cutting efficiency of the large-size substrate.

[0074] 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 large-size substrate cutting device for circuit board production, comprising a gantry (4) fixed on a backing plate (3), characterized in that: A double-acting oil cylinder (5) is fixedly provided on the pad (3) and a connecting block (6) is fixedly provided on the two piston rods of the double-acting oil cylinder (5). A knife seat (7) is fixedly provided on the two connecting blocks (6). A limiting seat (8) is fixedly provided on the top surface of the two knife seats (7). A limiting groove (9) is provided in the limiting seat (8) and passes through the left and right end surfaces thereof. The groove height of the limiting groove (9) is equal to the thickness of the large-size substrate (1). The longitudinal width of the limiting groove (9) is equal to the longitudinal width of the large-size substrate (1). A gap (10) is left between the inner end surfaces of the two knife seats (7). Two feeding and cutting mechanisms (11) are provided on the crossbeam of the gantry (4) and correspond to the knife seats (7) respectively. The feeding and cutting mechanism (11) located on the left side includes a cutting oil cylinder (12) fixed on the top surface of the crossbeam of the gantry (4), and a fixed plate (13) fixed on the bottom surface of the crossbeam and located on the right side of the cutting oil cylinder (12). The piston rod of the cutting oil cylinder (12) passes through the crossbeam downward, and a cutter (14) is fixed on the extended end. A horizontally arranged feeding cylinder (15) is fixed on the right end surface of the fixed plate (13). A rotating cylinder (16) is fixed on the action end of the piston rod of the feeding cylinder (15). A rotating plate (17) is fixed on the rotating shaft of the rotating cylinder (16). The rotating plate (17) extends upward above the rotating cylinder (16) and a push rod (18) is fixed on the extended end. A cutting oil cylinder (19) is fixedly provided on the top surface of the crossbeam of the gantry (4) and located between the two feeding and cutting mechanisms (11). The piston rod of the cutting oil cylinder (19) passes through the crossbeam, and a cutting knife (20) is fixedly provided on the extended end. The cutting knife (20) is arranged just above the gap (10).

2. The large-size substrate cutting device for circuit board production according to claim 1, characterized in that: The horizontal width of the gap (10) is equal to the thickness of the cutting blade (20).

3. The large-size substrate cutting device for circuit board production according to claim 2, characterized in that: The two knife seats (7) are arranged symmetrically with respect to the double-acting oil cylinder (5).

4. The large-size substrate cutting device for circuit board production according to claim 3, characterized in that: The two feeding and cutting mechanisms (11) are symmetrically arranged with respect to the cutting oil cylinder (19).

5. The large-size substrate cutting device for circuit board production according to claim 4, characterized in that: A mounting plate is fixed on the active end of the piston rod of the feed cylinder (15), and the cylinder barrel of the rotary cylinder (16) is fixed on the right end surface of the mounting plate.

6. The large-size substrate cutting device for circuit board production according to claim 5, characterized in that: The rotating cylinder (16), the feeding cylinder (15) and the mounting plate are located on the same straight line.

7. The large-size substrate cutting device for circuit board production according to claim 6, characterized in that: A connecting seat is fixed on the active end of the piston rod of the cutting oil cylinder (19), and the cutting knife (20) is fixed on the bottom surface of the connecting seat.

8. The large-size substrate cutting device for circuit board production according to claim 7, characterized in that: The device also includes a controller, which is electrically connected to the double-acting oil cylinder (5), the cut-off oil cylinder (19), the feed cylinder (15) and the rotating cylinder (16) via signal lines.

9. A method for cutting large-size substrates for circuit board production, using the large-size substrate cutting device for circuit board production according to claim 8, characterized in that: It includes the following steps: S1. A worker takes out a large-size substrate (1), passes the large-size substrate (1) from right to left through the right limiting groove (9) and the left limiting groove (9), and supports the left and right ends of the large-size substrate (1) on two knife seats (7) respectively, while ensuring that the center line of the large-size substrate (1) is directly below the cutting knife (20), thereby achieving the installation of the large-size substrate (1); S2. The piston rod of the control cutting oil cylinder (19) extends downward, the piston rod drives the connecting seat to move downward, the connecting seat drives the cutting knife (20) to move downward, and the cutting knife (20) moves toward the center line of the large-size substrate (1). When the cutting knife (20) matches the gap, the cutting knife (20) cuts the large-size substrate (1) along the center line. After cutting, a left half (21) of the large-size substrate and a right half (22) of the large-size substrate are obtained in the two limiting grooves (9) respectively. S3, control the piston rod of the cutting oil cylinder (19) to retract upward, the piston rod drives the cutting knife (20) to move upward, and then control the two piston rods of the double-acting oil cylinder (5) to extend outward, the two piston rods respectively drive the two connecting blocks (6) to move outward, and the two connecting blocks (6) respectively drive the two knife holders (7) to move outward, wherein the left knife holder (7) drives the left half of the large-size substrate (21) to move leftward; At the same time, the knife holder (7) on the right side drives the right half (22) of the large-sized substrate to move to the right. When the two piston rods of the double-acting oil cylinder (5) are fully extended, the left half (21) and the right half (22) of the large-sized substrate respectively enter the cutting station of the feeding and cutting mechanism (11). At this time, the outer end faces of the two knife holders (7) are respectively flush with the inner end faces of the cutters (14) of the two feeding and cutting mechanisms (11); S4, the piston rods of the cutting oil cylinders (12) controlling the two feeding and cutting mechanisms (11) extend downward, and the piston rods drive the cutters (14) to move downward, and the two cutters (14) respectively move toward the outer extensions of the left half (21) and the right half (22) of the large-sized substrate. When the inner end faces of the two cutters (14) respectively match the outer end faces of the two knife holders (7), the two cutters (14) respectively cut off the outer extensions of the left half (21) and the right half (22) of the large-sized substrate, thereby obtaining two strip-shaped substrates (2); S5, the piston rod of the cutting oil cylinder (12) of the two feeding and cutting mechanisms (11) is retracted upward, and the piston rod drives the cutter (14) to move upward to prepare for the second cutting; S6, controlling the rotation shafts of the rotary cylinders (16) of the two feeding and cutting mechanisms (11) to rotate, the rotary shafts drive the rotary plate (17) to move downward, and the rotary plate (17) drives the push rod (18) to rotate downward. When the two push rods (18) rotate 180 degrees downward, the controller controls the rotary cylinders (16) of the two feeding and cutting mechanisms (11) to close. At this time, the push rod (18) on the left is opposite to the left half (21) of the large-size substrate, and the push rod (18) on the right is opposite to the right half (22) of the large-size substrate. S7, control the piston rods of the feed cylinders (15) of the two feeding and cutting mechanisms (11) to retract, the piston rods drive the mounting plate connected thereto to move outward, the mounting plate drives the rotating cylinder (16) connected thereto to move outward, the rotating cylinder (16) drives the rotating plate (17) and the push rod (18) to move outward synchronously, during the movement, the push rod (18) on the left pushes the left half (21) of the large-size substrate to the left, while the push rod (18) on the right pushes the right half (22) of the large-size substrate to the right, so that the outer ends of the left half (21) and the right half (22) of the large-size substrate extend to the outside of the knife seat (7), and when the piston rod of the feed cylinder (15) retracts to the set stroke, the controller controls the feed cylinder (15) to close; S8, repeating the operation of step S4, the two cutters (14) cut off the outer extensions of the left half (21) and the right half (22) of the large-size substrate respectively, thereby obtaining two strip substrates (2) again; S9. The worker repeats the operations of steps S7 to S8 for multiple times, and the left half (21) and the right half (22) of the large-size substrate are gradually cut into the required strip substrates (2).

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