A high-efficiency bending method applied to a flexible circuit board

Abstract

The application provides a high-efficiency bending method applied to a flexible circuit board, which is realized by a bending device and comprises the following specific steps: (1) placing a first circuit board on a first workbench, with a connecting terminal of the first circuit board extending out of the placing table; (2) placing a second circuit board on a second workbench; (3) driving a turnover device to turn over the second circuit board to the first workbench, so that the first circuit board and the second circuit board correspond to each other; (4) fixing the front ends of the first circuit board and the second circuit board by a fixing assembly; (5) resetting the turnover device, so that the second circuit board is located above the first circuit board; (6) moving a bending limiting device downward and limiting the rear ends of the first circuit board and the second circuit board; and (7) moving a bending device upward through a bending interval to bend the first circuit board and the second circuit board, so that the bending consistency is good and the bending efficiency is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flexible circuit board, and particularly relates to a high-efficiency bending method applied to a flexible circuit board. BACKGROUND

[0002] Flexible circuit board, also known as "soft board", is a printed circuit made of flexible insulating substrate. Flexible circuit provides excellent electrical performance, can meet the design needs of smaller and higher density installation, and also helps to reduce assembly process and enhance reliability. It can be freely bent, wound and folded, can withstand millions of dynamic bending without damaging the wire, can be arranged arbitrarily according to the spatial layout requirements, and can be moved and stretched arbitrarily in three-dimensional space, so as to achieve the integration of component assembly and wire connection; flexible circuit board can greatly reduce the volume and weight of electronic products, and meet the needs of the development of electronic products towards high density, miniaturization and high reliability.

[0003] In the assembly process of automobile electric steering motor electronic control unit, the assembly of double-layer flexible circuit board is involved. After the first layer circuit board is assembled on the motor, the second layer circuit board needs to be assembled to the appropriate position through bending the flexible board and then fastened by bolts.

[0004] The existing assembly line adopts manual bending of flexible circuit board, and the assembly process cannot avoid that the flexible circuit board is not subjected to tensile stress and compressive stress, and the manual efficiency is low, which cannot meet the requirements of assembly line rhythm, so an automatic bending device is developed. For example, Chinese patent application No. 202410580050.5, published on July 16, 2024, discloses a new energy automobile flexible FPC bidirectional bending device and a bending machine thereof, which comprises a UVW platform, a support box, a linear module, a lifting frame, a first bending part, a second bending part, a bending head and a bearing film tearing assembly. The UVW platform is horizontally arranged on the machine table; 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 part comprises two groups, and the two groups of first bending parts are arranged on the inner side walls of the two side edges of the lifting frame; the second bending part is connected to the output end of the first bending part; the bending head is connected to the output end of the second bending part; and the bearing film tearing assembly is arranged below the bending head. The above document realizes precise positioning, automatic bending, adsorption and compression fixing during bending of the flexible FPC bending line, ensures the bending accuracy, has the functions of bearing lifting and automatic film tearing, realizes bidirectional and multiple bending, and effectively improves the bending efficiency.

[0005] However, the above document loads the flexible circuit board by adsorption, so that it bends one piece of flexible circuit board at a time, and the bending is performed in the transverse position, which leads to low bending efficiency, and for the application scenario of double-layer flexible circuit board, the bending is performed twice, which cannot ensure the consistency of the bending position and the bending precision. Summary of the Invention

[0006] This invention provides an efficient bending method for flexible circuit boards, achieving high-efficiency bending and thus improving efficiency and bending accuracy.

[0007] To achieve the above objectives, the technical solution of the present invention is: a high-efficiency bending method for flexible circuit boards, implemented by a bending device. The bending device includes a frame, a first worktable for placing a first circuit board on the frame, a flipping device on one side of the frame, a second worktable for placing a second circuit board on the flipping device, a placement platform for placing the first circuit board at the front end of the first worktable, the free end portion of the connecting terminals of the first circuit board extending out of the placement platform, a bending interval between the placement platform and the first worktable, a bending device below the bending interval, and the bending device passing through the bending interval to bend the first and second circuit boards on the first worktable; a fixing component is also provided on the frame at the front end of the placement platform, and a bending limiting device is provided above the first worktable; the specific steps include:

[0008] (1) Place the first circuit board on the first workbench, and the connection terminals of the first circuit board extend out of the placement table.

[0009] (2) Place the second circuit board on the second workbench.

[0010] (3) The flipping device drives the second circuit board to flip onto the first worktable, so that the first circuit board and the second circuit board are positioned opposite each other.

[0011] (4) The fixing component fixes the front ends of the first circuit board and the second circuit board.

[0012] (5) The flipping device is reset, so that the second circuit board is located above the first circuit board.

[0013] (6) The bending limiting device moves downward and restricts the rear ends of the first circuit board and the second circuit board.

[0014] (7) The bending device moves upward through the bending section to bend the first circuit board and the second circuit board.

[0015] The method sets the first workbench for placing the first circuit board and the second workbench for placing the second circuit board, so that when the circuit board is bent, the first circuit board is placed on the first workbench first, and the second circuit board is placed on the second workbench, then the second circuit board is flipped by the flipping device, 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 also can realize that the second circuit board is separated from the flipping device, then the flipping device is reset, at the same time, the bending limiting device moves downward and limits the rear ends of the first circuit board and the second circuit board, and then the first circuit board and the second circuit board are bent by the bending device to form a bending mark, in the process of bending, since the front ends of the first circuit board and the second circuit board are fixed, the rear ends of the first circuit board and the second circuit board are driven to move forward by the bending device while the bending device moves upward, the first circuit board and the second circuit board are limited by the bending limiting device, so that the rear ends of the first circuit board and the second circuit board will not be raised to affect the bending, thereby ensuring that the bending positions of the first circuit board and the second circuit board are consistent when bending, so as to facilitate the subsequent installation of the circuit board, and the flipping device can realize that the double-layer flexible circuit board can be better overlapped and placed, the bending operation can be performed at one time, the bending efficiency is improved, and the bending precision is ensured, so that the consistency of the bending positions of the double-layer circuit board is good.

[0016] Further, the front end of the placing table is provided with a clamping groove, the connecting terminal of the first circuit board is clamped in the clamping groove, and the connecting terminal of the first circuit board is arranged to extend out of the clamping groove, and the connecting terminal of the second circuit board corresponds to the connecting terminal of the first circuit board.

[0017] The above arrangement facilitates positioning of the connecting terminal of the first circuit board, and facilitates placement of the first circuit board.

[0018] Further, the flipping device comprises a flipping base, a flipping motor and a flipping connecting plate, the flipping base is arranged on the rack, the flipping motor is arranged on the flipping base, the 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 rack 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 placing groove for placing the second circuit board is arranged on the second workbench, the connecting terminal of the second circuit board extends out of the second workbench, and the flipping motor drives the second circuit board to flip above the first circuit board.

[0019] The above arrangement flips the second workbench by the flipping motor and the flipping second motor, so that the second circuit board placed on the second workbench can be flipped and placed on the first circuit board.

[0020] Further, the fixing assembly comprises a fixing cylinder and a fixing block, the fixing block is arranged on the piston rod of the fixing cylinder and above the placing table, the cylinder body of the fixing cylinder is installed on the rack, and 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.

[0021] The above arrangement drives the fixing block to move downward and press the front ends of the first circuit board and the second circuit board through the fixing cylinder, so that the first circuit board and the second circuit board will not displace when being bent.

[0022] Further, the bending device comprises a bending base, a bending guide rail, a bending sliding block, a bending plate and a bending cylinder, the bending base is arranged on the rack, the bending cylinder is arranged on the bending base, the piston rod of the bending cylinder is provided with the bending plate, the bending guide rail is arranged on the bending plate, the bending sliding block is arranged on the bending base, and the bending guide rail is arranged on the bending sliding block; 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.

[0023] The above arrangement drives the bending plate to move upward to bend the first circuit board and the second circuit board through the bending cylinder, which is simple and effective.

[0024] Further, the bending limiting device comprises a bending limiting rack, a bending limiting cylinder, a bending limiting connecting block, a bending limiting base plate, a bending limiting guide rail, a bending lifting cylinder and a bending limiting plate, the bending limiting rack is arranged on the rack and above the first workbench, the bending limiting cylinder is arranged on the bending limiting rack, the piston rod of the bending limiting cylinder is provided with the bending limiting connecting block, the bending limiting guide rail is arranged on the bending limiting rack, the bending limiting base plate is slidably arranged on the bending limiting guide rail through the bending limiting sliding block, the bending limiting base plate is connected with the bending limiting connecting block, the bending lifting cylinder is arranged on the bending limiting base plate, and the piston rod of the bending lifting cylinder is provided with the bending limiting plate; the bending limiting cylinder drives the bending limiting base plate to move to a position above the first workbench and corresponding to the first circuit board and the second circuit board, and the bending lifting cylinder drives the bending limiting plate to move downward and limit the first circuit board and the second circuit board.

[0025] The above arrangement drives the bending limiting base plate to move to a position above the first workbench and corresponding to the first circuit board and the second circuit board through the bending limiting cylinder, and drives the bending limiting plate to move downward and limit the first circuit board and the second circuit board through the bending lifting cylinder, so as to ensure that the positions of the first circuit board and the second circuit board will not easily change when the first circuit board and the second circuit board are bent, thereby ensuring the stability of the bending.

[0026] Further, the second workbench is provided with more than one positioning block on both sides of the placing groove.

[0027] The above arrangement can limit the second circuit board in the placing groove through the positioning block, thereby ensuring that the second circuit board will not fall out during the turning process.

[0028] Further, the side of the positioning block close to the placing groove is provided with an upward and outward inclined inclined surface, the bottom of the inclined surface is provided with a straight surface, and the length of the inclined surface is greater than the length of the straight surface.

[0029] The above arrangement can conveniently put the second circuit board into the placing groove through the arrangement of the inclined surface, limit the second circuit board in the horizontal direction through the arrangement of the straight surface, and conveniently separate from the placing groove through the length of the inclined surface being greater than the length of the straight surface. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a three-dimensional schematic view of the bending equipment of the present application.

[0031] Figure 2 It is Figure 1 An enlarged view of A in FIG.

[0032] Figure 3 It is a structural schematic view of the placing table of the present application.

[0033] Figure 4 It is a structural schematic view of the turning device of the present application.

[0034] Figure 5 It is a structural schematic view of the fixing assembly of the present application.

[0035] Figure 6 It is a structural schematic view of the bending device of the present application.

[0036] Figure 7 It is a structural schematic view of the bending limiting device of the present application.

[0037] Figure 8 It is a work flow chart of the present application.

[0038] Figure 9 It is Figure 4 An enlarged view of B in FIG.

[0039] Explanation of reference numerals: 03-connector; 1-rack; 11-first workbench; 12-second workbench; 13-placing table; 131-card slot; 2-flipping device; 21-flipping base; 22-flipping motor; 23-flipping connecting plate; 24-flipping bearing bracket; 25-flipping second motor; 26-flipping bearing plate; 27-placing slot; 28-positioning block; 40-bending interval; 4-bending device; 41-bending base; 42-bending guide rail; 43-bending sliding block; 44-bending plate; 45-bending cylinder; 50-connector placing plate; 57-fixing assembly; 571-fixing cylinder; 572-fixing block; 6-bending limiting device; 61-bending limiting rack; 62-bending limiting cylinder; 63-bending limiting connecting block; 64-bending limiting base plate; 65-bending limiting guide rail; 66-bending lifting cylinder; 67-bending limiting plate. DETAILED DESCRIPTION

[0040] The application will be further described in detail below in combination with the drawings and specific embodiments.

[0041] As shown in Figure 1 and Figure 7 , Figure 9 A bending device comprises a rack 1, a first workbench 11 for placing a first circuit board (not shown in the figure) is arranged on the rack 1, a flipping device 2 is arranged on one side of the rack 1, a second workbench 12 for placing a second circuit board (not shown in the figure) is arranged 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 arranged at the front end of the first workbench 11, the connecting terminal of the first circuit board extends out of the placing table 13, a bending interval 40 is arranged between the placing table 13 and the first workbench 11, a bending device 4 is arranged below the bending interval 40, and the bending device 4 bends the first circuit board and the second circuit board on the first workbench 11 through the bending interval 40.

[0042] As shown in Figure 3 , a card slot 131 is arranged at the front end of the placing table 13, the connecting terminal of the first circuit board is arranged in the card slot 131, the connecting terminal of the first circuit board extends out of the card slot, and the connecting terminal of the second circuit board corresponds to the connecting terminal of the first circuit board. The arrangement of the card slot 131 facilitates the positioning of the connecting terminal of the first circuit board and facilitates the placement of the first circuit board.

[0043] As shown in Figure 4As shown, the turnover device 2 comprises a turnover base 21, a turnover motor 22 and a turnover connecting plate 23, the turnover base 21 is arranged on the rack 1, the turnover motor 22 is arranged on the turnover base 21, the turnover connecting plate 23 is arranged on the driving shaft of the turnover motor 22, one end of the second workbench 12 is connected with the turnover connecting plate 23, the turnover supporting frame 24 is arranged on the rack 1 at the other end of the second workbench 12, the turnover second motor 25 is arranged on the turnover supporting frame 24, the second workbench 12 is arranged on the turnover second motor 25 through the turnover supporting plate 26, the placing groove 27 for placing the second circuit board is arranged on the second workbench 12, the connecting terminal of the second circuit board is arranged outside the second workbench 12, and the turnover motor 22 drives the second circuit board to turn over above the first circuit board. The second workbench is turned over by the turnover motor 22 and the turnover second motor 25, so that the second circuit board placed on the second workbench 12 can be turned over and placed on the first circuit board. In the embodiment, the second circuit board is embedded into the placing groove 27, and the second circuit board is prevented from separating from the second workbench 12 due to gravity during the turning over process by the action of the placing groove 27.

[0044] As shown in the figure, Figure 9 In the embodiment, one or more positioning blocks 28 are arranged on the second workbench 12 and located on both sides of the placing groove 27, the side of the positioning block 28 close to the placing groove 27 is provided with an inclined surface 281 arranged upward and outward, 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, and the second circuit board is placed in the placing groove 27 by the positioning block 28.

[0045] As shown in the figure, Figure 5 In the embodiment, the fixed assembly 57 is arranged on the rack at the front end of the placing table, the fixed assembly 57 comprises a fixed cylinder 571 and a fixed block 572, the fixed block 572 is arranged on the piston rod of the fixed cylinder 571 and located above the placing table 13, the cylinder body of the fixed cylinder 571 is mounted on the rack 1, and the fixed cylinder 571 drives the fixed block 572 to move downward and press the front end of the first circuit board and the second circuit board. The front end of the first circuit board and the second circuit board is pressed by the downward movement of the fixed block 572 driven by the fixed cylinder 571, so that the first circuit board and the second circuit board will not displace when being bent. In the embodiment, the fixed block 572 is arranged on the piston rod of the fixed cylinder 571 by rotating the rotating part (not shown in the figure), and the fixed block 572 can be rotated to the rear of the fixed cylinder 571 by the rotating part, so that the circuit board after being bent can be taken out conveniently. The rotating part is a device such as a motor commonly used in the prior art, and the specific description is in the prior art, which will not be repeated here.

[0046] As shown in the figure, Figure 2As shown, when the turnover device 2 turns over the second circuit board to the first circuit board, the connecting terminals of the second circuit board and the connecting terminals of the first circuit board are oppositely arranged, that is, the connecting terminals of the first circuit board and the connecting terminals of the second circuit board are oppositely arranged in the up-down direction, 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, a connector 03 can be sleeved on the connecting terminals at the front end 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.

[0047] As shown in Figure 6 The bending device 4 includes a bending base 41, a bending guide rail 42, a bending sliding block 43, a bending plate 44, and a bending cylinder 45. The bending base 41 is arranged on the rack 1, and the bending cylinder 45 is arranged on the bending base 41. The piston rod of the bending cylinder 45 is provided with the bending plate 44, and the bending guide rail 42 is arranged on the bending plate 44. The bending sliding block 43 is arranged on the bending base 41, and the bending guide rail 42 is arranged on the bending sliding block 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, which is simple and effective.

[0048] As shown in Figure 1 and Figure 7As shown, the bending limiting device 6 is arranged above the first workbench 11, and the bending limiting 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 limiting device 6 comprises a bending limiting rack 61, a bending limiting cylinder 62, a bending limiting connecting block 63, a bending limiting base plate 64, a bending limiting guide rail 65, a bending lifting cylinder 66 and a bending limiting plate 67, the bending limiting rack 61 is arranged on the rack 1 and above the first workbench 11, the bending limiting cylinder 62 is arranged on the bending limiting rack 61, the bending limiting connecting block 63 is arranged on the piston rod of the bending limiting cylinder 62, the bending limiting guide rail 65 is arranged on the bending limiting rack 61, the bending limiting base plate 64 is slidably arranged on the bending limiting guide rail 65 through the bending limiting sliding block 68, the bending limiting base plate 64 is connected with the bending limiting connecting block 63, the bending lifting cylinder 66 is arranged on the bending limiting base plate 64, and the bending limiting plate 67 is arranged on the piston rod of the bending lifting cylinder 66; the bending limiting cylinder 62 drives the bending limiting base plate 64 to move to the position corresponding to the first circuit board and the second circuit board above the first workbench 11, and the bending lifting cylinder 66 drives the bending limiting plate 67 to move downward and limit the first circuit board and the second circuit board. The bending limiting base plate 64 is driven by the bending limiting cylinder 61 to move to the position corresponding to the first circuit board and the second circuit board above the first workbench 11, and the bending lifting cylinder 66 drives the bending limiting plate 67 to move downward and limit the first circuit board and the second circuit board, so that the positions of the first circuit board and the second circuit board are not easily changed when the first circuit board and the second circuit board are bent, thereby ensuring the stability of the bending.

[0049] As shown, Figure 8 A high-efficiency bending method applied to a flexible circuit board, comprising the following steps:

[0050] (1) Place the first circuit board on the first workbench, and the connecting terminal of the first circuit board extends out of the placing table.

[0051] (2) Place the second circuit board on the second workbench.

[0052] (3) The overturning device drives the second circuit board to overturn onto the first workbench, so that the first circuit board and the second circuit board are oppositely arranged.

[0053] (4) The fixing assembly fixes the front ends of the first circuit board and the second circuit board.

[0054] (5) The overturning device is reset, so that the second circuit board is above the first circuit board.

[0055] (6) The bending limiting device moves downward and limits the rear ends of the first circuit board and the second circuit board.

[0056] (7) The bending device moves upwards through the bending interval to bend the first circuit board and the second circuit board.

[0057] (71) In the process of bending, since the front ends of the first circuit board and the second circuit board are fixed, the rear ends of the first circuit board and the second circuit board are driven to move forward by the bending device while the bending device moves upwards, and the first circuit board and the second circuit board are limited by the bending limiting device, so that the rear ends of the first circuit board and the second circuit board will not be raised to affect the bending.

[0058] The working principle of the present application is as follows: by setting the first workbench 11 for placing the first circuit board and the second workbench 12 for placing the second circuit board, when the circuit board is installed, the first circuit board is placed on the first workbench 11 first, and the second circuit board is placed on the second workbench 12, then 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 while also realizing the disengagement of the second circuit board from the flipping device, then the flipping device is reset, at the same time, the bending limiting device moves downwards and limits the rear ends of the first circuit board and the second circuit board, and then the first circuit board and the second circuit board are bent by the bending device 4 to form a bending mark, in the process of bending, since the front ends of the first circuit board and the second circuit board are fixed, the rear ends of the first circuit board and the second circuit board are driven to move forward by the bending device while the bending device moves upwards, and the first circuit board and the second circuit board are limited by the bending limiting device, so that the rear ends of the first circuit board and the second circuit board will not be raised to affect the bending, thereby ensuring that the bending positions of the first circuit board and the second circuit board are consistent when bending, thereby facilitating the subsequent installation of the circuit board, and the flipping device can realize that the double-layer flexible circuit board can be better overlapped and placed, and can be bent once, thereby improving the bending efficiency and ensuring the bending precision, so that the consistency of the bending positions of the double-layer circuit board is good.

Claims

1. A high-efficiency bending method applied to a flexible circuit board, realized by a bending device, characterized in that: The bending device comprises a rack, a first workbench for placing a first circuit board is arranged on the rack, a turnover device is arranged on one side of the first workbench, a second workbench for placing a second circuit board is arranged on the turnover device, the turnover device drives the second workbench to turn over to 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 connecting terminal of the first circuit board extends out of the placing table, a bending interval is arranged between the placing table and the first workbench, a bending device is arranged below the bending interval, the bending device passes through the bending interval to bend the first circuit board and the second circuit board on the first workbench; a clamping groove is arranged at the front end of the placing table, the connecting terminal of the first circuit board is clamped on the clamping groove, and the connecting terminal of the first circuit board extends out of the clamping groove, the connecting terminal of the second circuit board corresponds to the connecting terminal of the first circuit board; a fixing assembly is further arranged on the rack at the front end of the placing table, a bending limiting device is arranged above the first workbench, a placing groove for placing the second circuit board is arranged on the second workbench, and the second circuit board is embedded into the placing groove. ​ The bending device comprises a bending base, a bending guide rail, a bending sliding block, a bending plate and a bending cylinder, the bending base is arranged on the rack, the bending cylinder is arranged on the bending base, a piston rod of the bending cylinder is provided with the bending plate, the bending guide rail is arranged on the bending plate, the bending sliding block is arranged on the bending base, and the bending guide rail is arranged on the bending sliding block; the bending cylinder drives the piston rod to extend out and drives the bending plate to move upward to bend the first circuit board and the second circuit board. The specific steps comprise: (1) placing the first circuit board on the first workbench, and extending the connecting terminal of the first circuit board out of the placing table; (2) placing the second circuit board on the second workbench; (3) driving the second circuit board to turn over to the first workbench by the turnover device, so that the first circuit board and the second circuit board are arranged oppositely; (4) fixing the front end of the first circuit board and the second circuit board by the fixing assembly; (5) resetting the turnover device, so that the second circuit board is located above the first circuit board; (6) moving the bending limiting device downward and limiting the rear end of the first circuit board and the second circuit board; (7) moving the bending device upward through the bending interval to bend the first circuit board and the second circuit board.

2. The efficient bending method for flexible circuit board according to claim 1, wherein: The turnover device comprises a turnover base, a turnover motor and a turnover connecting plate, the turnover base is arranged on the rack, the turnover motor is arranged on the turnover base, the turnover connecting plate is arranged on a driving shaft of the turnover motor, one end of the second workbench is connected to the turnover connecting plate, a turnover supporting frame is arranged on the rack at the other end of the second workbench, a turnover second motor is arranged on the turnover supporting frame, the second workbench is arranged on the turnover second motor through the turnover supporting plate, the connecting terminal of the second circuit board extends out of the second workbench, and the turnover motor drives the second circuit board to turn over above the first circuit board.

3. The efficient bending method for flexible circuit board according to claim 1, wherein: The fixing assembly comprises a fixing cylinder and a fixing block, the fixing block is arranged on the piston rod of the fixing cylinder and above the placement table, the cylinder body of the fixing cylinder is installed on the rack, and the fixing cylinder drives the fixing block to move downward and press the front end of the first circuit board and the second circuit board.

4. The efficient bending method for flexible circuit board according to claim 1, wherein: The bending limiting device comprises a bending limiting rack, a bending limiting cylinder, a bending limiting connecting block, a bending limiting base plate, a bending limiting guide rail, a bending lifting cylinder and a bending limiting plate, the bending limiting rack is arranged on the rack and above the first workbench, the bending limiting cylinder is arranged on the bending limiting rack, the bending limiting connecting block is arranged on the piston rod of the bending limiting cylinder, the bending limiting guide rail is arranged on the bending limiting rack, the bending limiting base plate is arranged on the bending limiting guide rail through the bending limiting sliding block, the bending limiting base plate is connected with the bending limiting connecting block, the bending lifting cylinder is arranged on the bending limiting base plate, and the bending limiting plate is arranged on the piston rod of the bending lifting cylinder; the bending limiting cylinder drives the bending limiting base plate to move to the position corresponding to the first circuit board and the second circuit board above the first workbench, and the bending lifting cylinder drives the bending limiting plate to move downward and limit the first circuit board and the second circuit board.

5. The efficient bending method for flexible circuit board according to claim 1, wherein: More than one positioning block is arranged on the two sides of the placement groove on the second workbench.

6. The efficient bending method for flexible circuit board according to claim 5, wherein: The side of the positioning block close to the placement groove is provided with an upward and outward inclined inclined surface, the bottom of the inclined surface is provided with a straight surface, and the length of the inclined surface is greater than that of the straight surface. The side of the positioning block close to the placement groove is provided with an upward and outward inclined inclined surface, the bottom of the inclined surface is provided with a straight surface, and the length of the inclined surface is greater than that of the straight surface.

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