Efficient bending method applied to flexible circuit board

Abstract

The invention provides an efficient bending method applied to a flexible circuit board, which is realized through bending equipment and comprises the following specific steps: (1) a first circuit board is placed on a first workbench, and a connecting terminal of the first circuit board extends out of a placing table; (2) placing a second circuit board on a second workbench; (3) the turnover device drives the second circuit board to turn over to the first workbench, so that the first circuit board corresponds to the second circuit board; (4) fixing the front ends of the first circuit board and the second circuit board by a fixing assembly; (5) resetting the turnover device; the second circuit board is located above the first circuit board; (6) the bending limiting device moves downwards and limits the rear ends of the first circuit board and the second circuit board; and (7) the bending device penetrates through the bending section to move upwards to bend the first circuit board and the second circuit board, the bending consistency is good, and the bending efficiency is high.

Description

Technical Field

[0001] The present invention relates to the technical field of flexible circuit boards, and in particular to an efficient bending method applied to flexible circuit boards. Background Art

[0002] Flexible circuit boards, also known as "soft boards", are printed circuits made of flexible insulating substrates. Flexible circuits provide excellent electrical properties, can meet the design needs of smaller and higher density installations, and also help reduce assembly processes and enhance reliability. They can be bent, wound, and folded freely, can withstand millions of dynamic bends without damaging the wires, can be arranged arbitrarily according to spatial layout requirements, and can be moved and stretched arbitrarily in three-dimensional space, thereby achieving the integration of component assembly and wire connection; flexible circuit boards can greatly reduce the size and weight of electronic products, and are suitable for the development of electronic products towards high density, miniaturization, and high reliability.

[0003] The assembly process of the electric steering control unit of an automobile involves the assembly of a double-layer flexible circuit board. After the first layer of the circuit board is installed on the motor, the second layer of the circuit board needs to be assembled to the appropriate position by bending the flexible board and then fastened with bolts.

[0004] The existing assembly lines use manual bending of flexible circuit boards. The assembly process cannot avoid the flexible circuit boards being subjected to tensile stress and compressive stress, and the low manual efficiency cannot meet the assembly line rhythm requirements, so automatic bending devices came into being, such as Chinese patent application No. 202410580050.5, with an announcement date of 2024.07.16, which discloses a new energy vehicle flexible FPC bidirectional bending device and its bending machine, including a UVW platform, a support box, a linear module, a lifting frame, a first bending component, a second bending component, a bending head and a load-bearing film tearing assembly, wherein the UVW platform is horizontally arranged on the machine platform; the support box is vertically arranged on the UVW platform; the linear module is vertically arranged on the side wall of the support box; the lifting frame is connected to the output end of the linear module; the first bending component includes two groups, and the two groups of first bending components are respectively arranged on the inner side walls of the two sides of the lifting frame; the second bending component is connected to the output end of the first bending component; the bending head is connected to the output end of the second bending component; and the load-bearing film tearing assembly is arranged below the bending head. The above documents realize precise positioning of the flexible FPC bending line, automatic bending, adsorption and clamping during bending, ensure bending accuracy, have load-bearing lifting and automatic film tearing functions, realize bidirectional multiple bending, and effectively improve bending efficiency.

[0005] However, the above documents load materials by adsorption, so that each time a flexible circuit board is bent, the bending is always performed in a horizontal position, which results in low bending efficiency. For application scenarios requiring a double-layer flexible circuit board, bending is performed twice, and the consistency of the bending position and bending accuracy cannot be ensured. Summary of the invention

[0006] The present invention provides a high-efficiency bending method applied to a flexible circuit board, which realizes high-efficiency bending, thereby improving efficiency and bending accuracy. To achieve the above-mentioned purpose, the technical solution of the present invention is: an efficient bending method for a flexible circuit board, which is implemented by a bending device, wherein the bending device comprises a frame, a first workbench for placing a first circuit board is provided on the frame, a flipping device is provided on the frame on one side of the first workbench, a second workbench for placing a second circuit board is provided on the flipping device, a placement table for placing the first circuit board is provided at the front end of the first workbench, the free end portion of the connecting terminal of the first circuit board extends out of the placement table, a bending interval is provided between the placement table and the first workbench, a bending device is provided below the bending interval, and the bending device passes through the bending interval to bend the first circuit board and the second circuit board on the first workbench; a fixing component is also provided on the frame at the front end of the placement table, and a bending limit device is provided above the first workbench; the specific steps include: (1) A first circuit board is placed on a first workbench, with the connection terminals of the first circuit board extending out of the placement table.

[0007] (2) Place the second circuit board on the second workbench.

[0008] (3) The flipping device drives the second circuit board to flip onto the first workbench, so that the first circuit board and the second circuit board are arranged opposite to each other.

[0009] (4) The fixing assembly fixes the front ends of the first circuit board and the second circuit board.

[0010] (5) The flipping device is reset so that the second circuit board is located above the first circuit board.

[0011] (6) The bending limit device moves downward and limits the rear ends of the first circuit board and the second circuit board.

[0012] (7) The bending device moves upward through the bending zone to bend the first circuit board and the second circuit board.

[0013] The above method is provided with a first workbench for placing the first circuit board and a second workbench for placing the second circuit board, so that when the circuit boards are bent, the first circuit board is first placed on the first workbench and the second circuit board is placed on the second workbench, thereby flipping the second circuit board through the flipping device so that the second circuit board can be flipped to the position of the first circuit board, and when the front ends of the first circuit board and the second circuit board are fixed by the fixing component, the fixing component can fix the first circuit board and the second circuit board and also realize the separation of the second circuit board from the flipping device, and then the flipping device is reset, and at the same time, the bending limit device moves downward and limits the rear ends of the first circuit board and the second circuit board, and then the first circuit board is bent by the bending device. The circuit board and the second circuit board are bent to form a bending mark. During the bending process, since the front ends of the first circuit board and the second circuit board are fixed, while the bending device moves upward, the rear ends of the first circuit board and the second circuit board are driven forward by the bending device. The first circuit board and the second circuit board are limited by the bending limit device so that the rear ends of the first circuit board and the second circuit board will not be lifted up and affect the bending, thereby ensuring that the bending positions of the first circuit board and the second circuit board are consistent during bending, thereby facilitating the subsequent installation of the circuit boards. The flipping device can realize better overlapping of the double-layer flexible circuit boards, and can perform a one-time bending operation, thereby improving the bending efficiency, and ensuring the bending accuracy, so that the bending positions of the double-layer circuit boards are consistent.

[0014] Furthermore, a card slot is provided at the front end of the placement table, and the connection terminals of the first circuit board are clamped on the card slot and extended out of the card slot, and the connection terminals of the second circuit board correspond to the connection terminals of the first circuit board.

[0015] The above arrangement facilitates positioning of the connection terminals of the first circuit board through the arrangement of the card slot, and facilitates placement of the first circuit board.

[0016] Furthermore, the flipping device includes a flipping base, a flipping motor and a flipping connecting plate, the flipping base is arranged on a frame, a flipping motor is arranged on the flipping base, a flipping connecting plate is arranged on the driving shaft of the flipping motor, one end of the second workbench is connected to the flipping connecting plate, a flipping support frame is arranged on the frame at the other end of the second workbench, a flipping second motor is arranged on the flipping support frame, the second workbench is arranged on the flipping second motor through the flipping support plate, a placement groove for placing the second circuit board is arranged on the second workbench, the connecting terminals of the second circuit board extend out of the second workbench, and the flipping motor drives the second circuit board to flip to above the first circuit board.

[0017] The above arrangement flips the second workbench by flipping the motor and the second flipping motor, thereby ensuring that the second circuit board placed on the second workbench can be flipped and placed on the first circuit board.

[0018] Furthermore, the fixing assembly includes a fixing cylinder and a fixing block, wherein the fixing block is arranged on the piston rod of the fixing cylinder and is located above the placing table, the cylinder body of the fixing cylinder is installed on the frame, and the fixing cylinder drives the fixing block to move downward and press the front end arrangement of the first circuit board and the second circuit board.

[0019] With the above arrangement, the fixing cylinder drives the fixing block to move downward and press the front ends of the first circuit board and the second circuit board, so that the first circuit board and the second circuit board will not be displaced during bending.

[0020] Furthermore, the bending device includes a bending base, a bending guide rail, a bending slider, a bending plate and a bending cylinder. The bending base is arranged on a frame, a bending cylinder is arranged on the bending base, a bending plate is arranged on the piston rod of the bending cylinder, a bending guide rail is arranged on the bending plate, a bending slider is arranged on the bending base, and the bending guide rail is arranged on the bending slider. The bending cylinder drives the piston rod to extend and drives the bending plate to move upward to bend the first circuit board and the second circuit board.

[0021] The above arrangement drives the bending plate to move upwards by the bending cylinder to bend the first circuit board and the second circuit board, and the structure is simple and effective.

[0022] Furthermore, the bending limit device includes a bending limit frame, a bending limit cylinder, a bending limit connecting block, a bending limit substrate, a bending limit guide rail, a bending lifting cylinder and a bending limit plate. The bending limit frame is arranged on the frame and is located above the first workbench. The bending limit frame is provided with a bending limit cylinder, the piston rod of the bending limit cylinder is provided with a bending limit connecting block, and the bending limit frame is provided with a bending limit guide rail. The bending limit substrate is slidably arranged on the bending limit guide rail through a bending limit slider, and the bending limit substrate is also connected to the bending limit connecting block. A bending lifting cylinder is provided on the bending limit substrate, and a bending limit plate is provided on the piston rod of the bending lifting cylinder; the bending limit cylinder drives the bending limit substrate to move to a position above the first workbench corresponding to the first circuit board and the second circuit board, and the bending lifting cylinder drives the bending limit plate to move downward and limit the first circuit board and the second circuit board.

[0023] The above arrangement drives the bending limit substrate to move to a position above the first workbench corresponding to the first circuit board and the second circuit board through the bending limit cylinder, and the bending lifting cylinder drives the bending limit plate to move downward and limit the first circuit board and the second circuit board, thereby ensuring that when the first circuit board and the second circuit board are bent, the positions of the first circuit board and the second circuit board are not easily changed, thereby ensuring the stability of the bending.

[0024] Furthermore, one or more positioning blocks are provided on the second workbench and are located on both sides of the placement, and the one or more positioning blocks are provided along the outer circumference of the placement groove.

[0025] The above arrangement can limit the second circuit board in the placement groove through the positioning block, thereby ensuring that the second circuit board will not fall out during the flipping process.

[0026] Furthermore, an inclined surface inclined upward and outward is provided on one side of the positioning block close to the placement groove, a straight surface is provided at the bottom of the inclined surface, and the length of the inclined surface is greater than the length of the straight surface.

[0027] The above arrangement, through the inclined surface arrangement, can facilitate the placement of the second circuit board into the placement groove, through the straight surface arrangement, can limit the second circuit board in the horizontal direction, and through the inclined surface length being greater than the straight surface length, can facilitate the removal from the placement groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a three-dimensional schematic diagram of the bending device of the present invention.

[0029] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0030] Figure 3 It is a structural schematic diagram of the placement table of the present invention.

[0031] Figure 4 It is a schematic structural diagram of the turning device of the present invention.

[0032] Figure 5 It is a schematic structural diagram of the fixing assembly of the present invention.

[0033] Figure 6 It is a schematic structural diagram of the bending device of the present invention.

[0034] Figure 7 It is a schematic structural diagram of the bending limit device of the present invention.

[0035] Figure 8 It is the work flow chart of the present invention.

[0036] Fig. 9 for Figure 4 Enlarged view of point B in the middle.

[0037] Description of the accompanying drawings: 03-connector; 1-frame; 11-first workbench; 12-second workbench 13-placing table; 131-card slot; 2-turning device; 21-turning base; 22-turning motor; 23-turning connecting plate 23; 24-turning support frame; 25-turning second motor; 26-turning support plate; 27-placing slot; 28-positioning block; 40-bending interval; 4-bending device; 41-bending base; 42-bending guide rail; 43-bending slider; 44-bending plate; 45-bending cylinder; 50-connector placement plate; 57-fixing component; 571-fixing cylinder; 572-fixing block; 6-bending limit device; 61-bending limit frame; 62-bending limit cylinder; 63-bending limit connecting block; 64-bending limit base plate; 65-bending limit guide rail; 66-bending lifting cylinder; 67-bending limit plate. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] like Figure 1 and Figure 7 , Fig. 9 As shown; a bending device, including a frame 1, a first workbench 11 for placing a first circuit board (not shown in the figure) is provided on the frame 1, a flipping device 2 is provided on the frame 1 on one side of the first workbench 11, a second workbench 12 for placing a second circuit board (not shown in the figure) is provided on the flipping device 2, the flipping device 2 drives the second workbench 12 to flip onto the first workbench 11 so that the first circuit board and the second circuit board correspond to each other; a placing table 13 for placing the first circuit board is provided at the front end of the first workbench 11, and the connecting terminal of the first circuit board extends out of the placing table 13, a bending section 40 is provided between the placing table 13 and the first workbench 11, and a bending device 4 is provided below the bending section 40, and the bending device 4 passes through the bending section 40 to bend the first circuit board and the second circuit board on the first workbench 11.

[0040] like Figure 3 As shown, a card slot 131 is provided at the front end of the placement platform 13, and the connection terminal of the first circuit board is clamped on the card slot 131, and the connection terminal of the first circuit board is arranged outside the card slot, and the connection terminal of the second circuit board corresponds to the connection terminal of the first circuit board. The card slot 131 is provided to facilitate positioning of the connection terminal of the first circuit board and facilitate placement of the first circuit board.

[0041] like Figure 4As shown, the flipping device 2 includes a flipping base 21, a flipping motor 22 and a flipping connecting plate 23. The flipping base 21 is arranged on the frame 1, the flipping motor 22 is arranged on the flipping base 21, the flipping connecting plate 23 is arranged on the driving shaft of the flipping motor 22, one end of the second workbench 12 is connected to the flipping connecting plate 23, a flipping support bracket 24 is arranged on the frame 1 at the other end of the second workbench 12, a flipping second motor 25 is arranged on the flipping support bracket 24, the second workbench 12 is arranged on the flipping second motor 25 through the flipping support plate 26, a placement groove 27 for placing the second circuit board is arranged on the second workbench 12, the connection terminal of the second circuit board extends out of the second workbench 12, and the flipping motor 22 drives the second circuit board to flip to the top of the first circuit board. The second workbench is flipped by the flipping motor 22 and the flipping second motor 25, so as to ensure that the second circuit board placed on the second workbench 12 can be flipped and placed on the first circuit board. In this embodiment, the second circuit board is embedded in the placement groove 27 , and the placement groove 27 prevents the second circuit board from being separated from the second workbench 12 due to gravity during the flipping process.

[0042] like Fig. 9 As shown, in the present embodiment, one or more positioning blocks 28 are provided on the second workbench 12 and are located on both sides of the placement. The side of the positioning block 28 close to the placement groove 27 is provided with an inclined surface 281 arranged upward and outward, and the lower end of the inclined surface 281 is provided with a straight surface 282. The length of the inclined surface 281 is greater than the length of the straight surface 282. The arrangement of the positioning block 28 facilitates the placement of the second circuit board in the placement groove.

[0043] like Figure 5 As shown, a fixing assembly 57 is also provided on the frame at the front end of the placement table, and the fixing assembly 57 includes a fixing cylinder 571 and a fixing block 572. The fixing block 572 is arranged on the piston rod of the fixing cylinder 571 and is located above the placement table 13. The cylinder body of the fixing cylinder 571 is installed on the frame 1, and the fixing cylinder 571 drives the fixing block 572 to move downward and press the front end of the first circuit board and the second circuit board. The fixing block 572 is driven by the fixing cylinder 571 to move downward and press the front end of the first circuit board and the second circuit board, so that the first circuit board and the second circuit board will not be displaced during bending. In this embodiment, the fixing block 572 is rotatably arranged on the piston rod of the fixing cylinder 571 by a rotating component (not shown in the figure), and the fixing block 572 can be rotated to the rear of the fixing cylinder 571 by the rotating component, so as to facilitate the removal of the bent circuit board. The rotating component is a common device such as a motor in the prior art, which is specifically the prior art and will not be repeated here.

[0044] like Figure 2As shown, when the flipping device 2 flips the second circuit board onto the first circuit board, the connecting terminals of the second circuit board and the connecting terminals of the first circuit board are arranged relatively to each other, that is, the connecting terminals of the first circuit board and the connecting terminals of the second circuit board are arranged correspondingly in the up and down directions, and then the connecting terminals of the first circuit board and the connecting terminals of the second circuit board are fixed by the fixing assembly. In another embodiment, the connector 03 can also be sleeved on the connecting terminals at the front ends of the first circuit board and the second circuit board, and the connecting terminals of the first circuit board and the second circuit board are connected and fixed by the connector 03. After the fixing is completed, the fixing cylinder 571 drives the fixing block 572 to move downward and press the connector 03, thereby realizing double fixing.

[0045] like Figure 6 As shown, the bending device 4 includes a bending base 41, a bending guide rail 42, a bending slider 43, a bending plate 44 and a bending cylinder 45. The bending base 41 is arranged on the frame 1, and a bending cylinder 45 is arranged on the bending base 41. A bending plate 44 is arranged on the piston rod of the bending cylinder 45, a bending guide rail 42 is arranged on the bending plate 44, a bending slider 43 is arranged on the bending base 41, and the bending guide rail 42 is arranged on the bending slider 43. The bending cylinder 45 drives the piston rod to extend and drives the bending plate 44 to move upward to bend the first circuit board and the second circuit board. The bending cylinder 45 drives the bending plate 44 to move upward to bend the first circuit board and the second circuit board, and the structure is simple and effective.

[0046] like Figure 1 and Figure 7As shown, a bending limit device 6 is provided above the first workbench 11, and the bending limit device 6 limits the first circuit board and the second circuit board when the bending device 4 bends the first circuit board and the second circuit board; the bending limit device 6 includes a bending limit frame 61, a bending limit cylinder 62, a bending limit connecting block 63, a bending limit substrate 64, a bending limit guide rail 65, a bending lifting cylinder 66 and a bending limit plate 67, the bending limit frame 61 is arranged on the frame 1 and is located above the first workbench 11, a bending limit cylinder 62 is provided on the bending limit frame 61, and a bending limit connecting block 63 is provided on the piston rod of the bending limit cylinder 62. A connecting block 63 is provided with a bending limit guide rail 65 on the bending limit frame 61, and the bending limit substrate 64 is slidably set on the bending limit guide rail 65 through a bending limit slider 68. The bending limit substrate 64 is also connected to the bending limit connecting block 63, and a bending lifting cylinder 66 is provided on the bending limit substrate 64, and a bending limit plate 67 is provided on the piston rod of the bending lifting cylinder 66; the bending limit cylinder 62 drives the bending limit substrate 64 to move to a position above the first workbench 11 corresponding to the first circuit board and the second circuit board, and the bending lifting cylinder 66 drives the bending limit plate 67 to move downward and limit the first circuit board and the second circuit board. The bending limit base plate 64 is driven by the bending limit cylinder 61 to move to a position above the first workbench 11 corresponding to the first circuit board and the second circuit board, and the bending lifting cylinder 66 drives the bending limit plate 67 to move downward and limit the first circuit board and the second circuit board, thereby ensuring that when the first circuit board and the second circuit board are bent, the positions of the first circuit board and the second circuit board are not easily changed, thereby ensuring the stability of the bending.

[0047] like Figure 8 As shown, an efficient bending method for a flexible circuit board includes the following steps: (1) A first circuit board is placed on a first workbench, with the connection terminals of the first circuit board extending out of the placement table.

[0048] (2) Place the second circuit board on the second workbench.

[0049] (3) The flipping device drives the second circuit board to flip onto the first workbench, so that the first circuit board and the second circuit board are arranged opposite to each other.

[0050] (4) The fixing assembly fixes the front ends of the first circuit board and the second circuit board.

[0051] (5) The flipping device is reset so that the second circuit board is located above the first circuit board.

[0052] (6) The bending limit device moves downward and limits the rear ends of the first circuit board and the second circuit board.

[0053] (7) The bending device moves upward through the bending zone to bend the first circuit board and the second circuit board.

[0054] (71) During the bending process, since the front ends of the first circuit board and the second circuit board are fixed, while the bending device moves upward, the rear ends of the first circuit board and the second circuit board are driven forward by the bending device, and the first circuit board and the second circuit board are restricted by the bending limit device so that the rear ends of the first circuit board and the second circuit board will not be lifted up and affect the bending.

[0055] The working principle of the present invention is as follows: by setting a first workbench 11 for placing a first circuit board and a second workbench 12 for placing a second circuit board, when installing the circuit boards, the first circuit board is first placed on the first workbench 11, and the second circuit board is placed on the second workbench 12, thereby the second circuit board is flipped by the flipping device 2 so that the second circuit board can be flipped to the position of the first circuit board, when the front ends of the first circuit board and the second circuit board are fixed by the fixing assembly, the fixing assembly can fix the first circuit board and the second circuit board and can also realize the separation of the second circuit board from the flipping device, and then the flipping device is reset, and at the same time, the bending limit device moves downward and limits the rear ends of the first circuit board and the second circuit board, and then through the bending The device 4 bends the first circuit board and the second circuit board to form a bending mark. During the bending process, since the front ends of the first circuit board and the second circuit board are fixed, while the bending device moves upward, the rear ends of the first circuit board and the second circuit board are driven forward by the bending device. The first circuit board and the second circuit board are limited by the bending limit device so that the rear ends of the first circuit board and the second circuit board will not be lifted up and affect the bending, thereby ensuring that the bending positions of the first circuit board and the second circuit board are consistent during bending, thereby facilitating the subsequent installation of the circuit boards. The flipping device can achieve better overlapping of the double-layer flexible circuit boards, and can perform a one-time bending operation, thereby improving the bending efficiency, and ensuring the bending accuracy, so that the bending positions of the double-layer circuit boards are consistent.

Claims

1. An efficient bending method for a flexible circuit board, implemented by a bending device, characterized in that: The bending equipment comprises a frame, a first workbench for placing a first circuit board is arranged on the frame, a flipping device is arranged on the frame on one side of the first workbench, a second workbench for placing a second circuit board is arranged on the flipping device, the flipping device drives the second workbench to flip onto the first workbench so that the first circuit board and the second circuit board correspond to each other; a placing table for placing the first circuit board is arranged at the front end of the first workbench, the connection terminal of the first circuit board extends out of the placing table, a bending section is arranged between the placing table and the first workbench, a bending device is arranged below the bending section, and the bending device passes through the bending section to bend the first circuit board and the second circuit board on the first workbench; a fixing component is also arranged on the frame at the front end of the placing table, and a bending limit device is arranged above the first workbench; the specific steps comprise: (1) placing a first circuit board on a first workbench, with the connection terminals of the first circuit board extending out of the placement table; (2) placing the second circuit board on the second workbench; (3) The flipping device drives the second circuit board to flip onto the first workbench, so that the first circuit board and the second circuit board are arranged opposite to each other; (4) The fixing assembly fixes the front ends of the first circuit board and the second circuit board; (5) The flipping device is reset so that the second circuit board is located above the first circuit board; (6) The bending limit device moves downward and limits the rear ends of the first circuit board and the second circuit board; (7) The bending device moves upward through the bending zone to bend the first circuit board and the second circuit board.

2. The efficient bending method for a flexible printed circuit board according to claim 1, characterized in that: A card slot is provided at the front end of the placement table, and the connection terminal of the first circuit board is carded on the card slot and extends out of the card slot. The connection terminal of the second circuit board corresponds to the connection terminal of the first circuit board.

3. The efficient bending method for a flexible printed circuit board according to claim 1, characterized in that: The flipping device includes a flipping base, a flipping motor and a flipping connecting plate, wherein the flipping base is arranged on a frame, a flipping motor is arranged on the flipping base, a flipping connecting plate is arranged on the driving shaft of the flipping motor, one end of the second workbench is connected to the flipping connecting plate, a flipping support frame is arranged on the frame at the other end of the second workbench, a flipping second motor is arranged on the flipping support frame, the second workbench is arranged on the flipping second motor through the flipping support plate, a placement groove for placing a second circuit board is arranged on the second workbench, the connecting terminals of the second circuit board extend out of the second workbench, and the flipping motor drives the second circuit board to flip to above the first circuit board.

4. The efficient bending method for a flexible printed circuit board according to claim 1, characterized in that: The fixing assembly includes a fixing cylinder and a fixing block, wherein the fixing block is arranged on the piston rod of the fixing cylinder and is located above the placing table, and the cylinder body of the fixing cylinder is installed on the frame. The fixing cylinder drives the fixing block to move downward and press the front end arrangement of the first circuit board and the second circuit board.

5. The efficient bending method for a flexible printed circuit board according to claim 1, characterized in that: The bending device includes a bending base, a bending guide rail, a bending slider, a bending plate and a bending cylinder. The bending base is arranged on a frame, a bending cylinder is arranged on the bending base, a bending plate is arranged on the piston rod of the bending cylinder, a bending guide rail is arranged on the bending plate, a bending slider is arranged on the bending base, the bending guide rail is arranged on the bending slider, and the bending cylinder drives the piston rod to extend and drives the bending plate to move upward to bend the first circuit board and the second circuit board.

6. The efficient bending method for a flexible printed circuit board according to claim 5, characterized in that: The bending limit device includes a bending limit frame, a bending limit cylinder, a bending limit connecting block, a bending limit substrate, a bending limit guide rail, a bending lifting cylinder and a bending limit plate, wherein the bending limit frame is arranged on the frame and is located above the first workbench, a bending limit cylinder is arranged on the bending limit frame, a bending limit connecting block is arranged on the piston rod of the bending limit cylinder, a bending limit guide rail is arranged on the bending limit frame, the bending limit substrate is slidably arranged on the bending limit guide rail through a bending limit slider, the bending limit substrate is also connected to the bending limit connecting block, a bending lifting cylinder is arranged on the bending limit substrate, and a bending limit plate is arranged on the piston rod of the bending lifting cylinder; the bending limit cylinder drives the bending limit substrate to move to a position above the first workbench corresponding to the first circuit board and the second circuit board, and the bending lifting cylinder drives the bending limit plate to move downward and limit the first circuit board and the second circuit board.

7. The efficient bending method for a flexible printed circuit board according to claim 1, characterized in that: One or more positioning blocks are also provided on the second workbench and are located on both sides of the placement groove, and the one or more positioning blocks are arranged along the outer circumference of the placement groove.

8. The efficient bending method for a flexible printed circuit board according to claim 7, characterized in that: An inclined surface inclined upward and outward is arranged on one side of the positioning block close to the placement groove, a straight surface is arranged at the bottom of the inclined surface, and the length of the inclined surface is greater than the length of the straight surface.

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