Bending processing equipment for flexible circuit board

Abstract

The invention provides bending processing equipment for a flexible circuit board, and relates to the field of integrated circuit manufacturing. The bending processing equipment for the flexible circuit board comprises a processing table; the bending assembly is arranged on the machining table and comprises a rotating shaft and a bending shaft, the rotating shaft is rotatably arranged on the machining table, and the bending shaft is connected with the rotating shaft; the pinch roll is arranged on the processing table, and when the bending shaft drives the flexible circuit board to be bent, the pinch roll is used for synchronously conveying the flexible circuit board in the direction of the bending shaft; and the negative pressure assembly is used for providing negative pressure for the suction hole. The flexible circuit board is gradually bent on the peripheral surface of the bending shaft, and meanwhile, the pinch roll synchronously conveys the flexible circuit board to the direction of the bending shaft, so that dynamic tension compensation is formed through synchronous movement of the pinch roll and the bending shaft, and the tensile residual stress of a copper foil layer of the flexible circuit board can be effectively eliminated; and the bending quality of the flexible circuit board is improved.

Description

Technical Field

[0001] The present invention relates to the field of integrated circuit manufacturing, and in particular to a bending processing device for flexible circuit boards. Background Art

[0002] With the rapid development of integrated circuit technology, the lightweight and bendable nature of flexible printed circuits (FPCs) has helped reduce the thickness of modern electronic devices (such as foldable phones and ultra-thin TVs). This has resulted in a very small gap between the backlight unit and the motherboard. The FPC must be bent with a very small radius and fit snugly against the back of the backlight unit to conserve internal space and avoid affecting the overall thickness of the device due to excessive FPC space occupation.

[0003] Currently, the flexible circuit boards in display panels require the bending radius to be as small as possible. After being bent 180°, they are attached to the backlight module. Due to the large change in radius during the bending process, most traditional bending processing equipment can easily cause the copper foil layer of the flexible circuit board to break and fail during bending, resulting in poor bending quality of the flexible circuit board. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a bending processing device for flexible circuit boards.

[0005] The present invention provides a bending processing device for a flexible circuit board, comprising: a processing table; a bending assembly, arranged on the processing table, the bending assembly comprising a rotating shaft and a bending shaft, the rotating shaft being rotatably arranged on the processing table, the bending shaft being connected to the rotating shaft, a silicone skin being connected to half of the outer circumference of the bending shaft, a suction hole being provided on the silicone skin, an L-shaped limiting plate being connected to the bending shaft, a slot for inserting the end of the flexible circuit board being formed between the L-shaped limiting plate and the bending shaft, and the suction hole being located in the slot; a pinching roller, arranged on the processing table, and when the bending shaft drives the flexible circuit board to bend, the pinching roller is used to synchronously convey the flexible circuit board in the direction of the bending shaft; a negative pressure assembly, used to provide negative pressure for the suction hole.

[0006] Optionally, when the bending angle of the flexible circuit board gradually increases, the negative pressure provided by the negative pressure component to the suction hole also gradually increases.

[0007] Optionally, a silicone skin is connected to half of the outer circumference of the bending shaft, and the suction hole is provided on the silicone skin.

[0008] Optionally, the bending assembly also includes an annular sheet and an electric heating wire. The annular sheet is connected to the inner circumference of the bending shaft. The annular sheet and the inner circumference of the bending shaft enclose an annular cavity. The annular cavity is opposite to the position of the silicone skin. The bending shaft is provided with an air outlet connected to the end of the annular cavity. The electric heating wire is arranged in the annular cavity. When the bending shaft drives the flexible circuit board to bend, the negative pressure assembly is used to provide negative pressure for the suction hole. When the bending shaft is reset, the negative pressure assembly is used to blow air into the annular cavity.

[0009] Optionally, the negative pressure component includes an intake and exhaust unit and a co-rotating unit, the intake and exhaust unit includes a piston cylinder, a screw shaft, an air pipe, a branch pipe, a two-position three-way valve and a piston, the piston is slidingly connected to the inner wall of the piston cylinder, one end of the screw shaft is rotatably connected to one end face of the piston cylinder, the other end of the screw shaft is rotatably connected to the other end face of the piston cylinder, the piston is threadedly connected to the screw shaft, one end of the air pipe is connected to the piston cylinder, the other end of the air pipe is inserted into the bending shaft and connected to one end of the branch pipe, the other end of the branch pipe is set as two branch pipes, the two branch pipes are respectively connected to the suction hole and the annular cavity, and the three channel interfaces of the two-position three-way valve are respectively connected to the branch pipe and the end of the two branch pipes.

[0010] Optionally, the suction and exhaust unit also includes a rope winding shaft, which is rotatably connected to the end of the piston cylinder and is sleeved on the screw shaft. One end of the same-direction rotating unit transmission chain is connected to the bending shaft, and the other end of the same-direction rotating unit transmission chain is connected to the rope winding shaft.

[0011] Optionally, the co-rotating unit includes two steel ropes, one end of the two steel ropes is spirally wound on the bending shaft, the other end of the two steel ropes is spirally wound on the rope winding shaft, and the two steel ropes are arranged in parallel.

[0012] Optionally, an exhaust hole is provided on the piston cylinder.

[0013] Optionally, the flexible circuit board bending processing equipment further includes a driving component, which is drivably connected to the rotating shaft to rotate the rotating shaft.

[0014] The beneficial effects of the flexible circuit board bending processing equipment of the present invention are as follows: by inserting one end of the flexible circuit board into the slot, the upper surface of the end of the flexible circuit board is tightly attached to the suction hole, and then the other end of the flexible circuit board is passed through the pinch roller. Since the rotating shaft in the bending assembly can rotate on the processing table, the bending shaft is driven to rotate, so that the flexible circuit board is gradually bent on the outer peripheral surface of the bending shaft, and then the suction hole generates negative pressure, which sucks the corresponding end of the flexible circuit board, and cooperates with the limiting effect of the L-shaped limiting plate to prevent the end of the flexible circuit board from detaching from the silicone skin during the bending process, thereby improving the stability of the suction hole's adsorption of the flexible circuit board. At the same time, the pinch roller synchronously transports the flexible circuit board in the direction of the bending shaft, thereby forming dynamic tension compensation through the synchronous movement of the pinch roller and the bending shaft, which can effectively eliminate the tensile residual stress of the copper foil layer of the flexible circuit board and improve the bending quality of the flexible circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of a flexible circuit board bending processing device according to an embodiment of the present invention;

[0016] Figure 2 A top view of a flexible circuit board bending processing device according to an embodiment of the present invention;

[0017] Figure 3 for Figure 2 A magnified view of the structure at point A;

[0018] Figure 4 This is a schematic structural diagram of a negative pressure assembly used in a flexible circuit board bending processing device according to an embodiment of the present invention;

[0019] Figure 5 This is a state diagram of a flexible circuit board bending processing device before bending begins according to an embodiment of the present invention;

[0020] Figure 6 This is a state diagram of a flexible circuit board bending processing device during a bending process according to an embodiment of the present invention;

[0021] Figure 7 This is a state diagram of the flexible circuit board bending processing equipment at the end of bending according to an embodiment of the present invention;

[0022] Figure 8 This is a state diagram of the flexible circuit board bending processing equipment during resetting according to an embodiment of the present invention;

[0023] Figure 9 for Figure 5 A magnified view of the structure in Figure 2.

[0024] Explanation of the accompanying reference numerals: 1. Processing table; 2. Bending assembly; 21. Rotating axis; 22. Bending axis; 221. Silicone skin; 2211. Suction hole; 222. Air outlet; 223. L-shaped limit plate; 23. Ring plate; 24. Electric heating wire; 3. Pinch roller; 4. Drive assembly; 5. Negative pressure assembly; 51. Piston cylinder; 52. Rope winding shaft; 53. Screw shaft; 54. Air pipe; 55. Wire rope; 56. Branch pipe; 57. Two-position three-way valve; 100. Flexible circuit board. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0026] In the description of the present invention, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0027] Throughout this specification, reference to terms such as "an embodiment," "one embodiment," "some embodiments," "exemplarily," and "one embodiment" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or embodiment are included in at least one embodiment or embodiment of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or embodiment. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or embodiments.

[0028] An embodiment of the present invention provides a bending processing device for a flexible circuit board, comprising: a processing table 1; a bending assembly 2, which is arranged on the processing table 1, and the bending assembly 2 includes a rotating shaft 21 and a bending shaft 22, the rotating shaft 21 is rotatably arranged on the processing table 1, the bending shaft 22 is connected to the rotating shaft 21, and a silicone skin 221 is connected to half of the outer circumference of the bending shaft 22, and a suction hole 2211 is provided on the silicone skin 221, and an L-shaped limiting plate 223 is connected to the bending shaft 22, and a slot for inserting the end of the flexible circuit board 100 is formed between the L-shaped limiting plate 223 and the bending shaft 22, and the suction hole 2211 is located in the slot; a pinching roller 3, which is arranged on the processing table 1, and when the bending shaft 22 drives the flexible circuit board 100 to bend, the pinching roller 3 is used to synchronously convey the flexible circuit board 100 in the direction of the bending shaft 22; a negative pressure assembly 5 is used to provide negative pressure for the suction hole 2211.

[0029] Specifically, combined Figure 4 、 Figure 5 、 Figure 6 and Figure 7 As shown, the silicone skin 221 can be coated on the outer circumference of the bending shaft 22 by hot pressing, and the silicone skin 221 covers half of the outer circumference of the bending shaft 22, for example Figure 5Before bending, the silicone skin 221 is covered on the left half of the circumference of the bending shaft 22, and the suction hole 2211 is opened at the bottom of the silicone skin 221. The L-shaped limiting plate 223 can be integrally formed on the bending shaft 22. The L-shaped limiting plate 223 and the outer circumference of the silicone skin 221 form a slot. It should be noted that the thickness of the flexible circuit board 100 is slightly larger than the height of the slot. When the end of the flexible circuit board 100 is inserted into the slot, the silicone skin 221 has a certain elasticity, so that the end of the flexible circuit board 100 can be smoothly inserted. The flexible circuit board 100 is inserted into the slot, and the two side surfaces of the end portion of the flexible circuit board 100 are tightly attached to the suction hole 2211 and the inner bottom surface of the L-shaped limit plate 223. The pinch roller 3 is used to convey the flexible circuit board 100. For example, the pinch roller 3 has an upper row of rollers and a lower row of rollers. The flexible circuit board 100 is conveyed between the upper row of rollers and the lower row of rollers. The upper row of rollers and the lower row of rollers can be driven by a stepper motor to control the rotation speed of the upper row of rollers and the lower row of rollers, so that the conveying speed of the upper row of rollers and the lower row of rollers is matched with the rotation angular velocity of the bending shaft 22. When the flexible circuit board 100 is bent to 180° ( Figure 7 The flexible circuit board 100 is removed and attached to a backlight module (not shown).

[0030] In this optional embodiment, combined with Figure 1 and Figure 2 As shown, by inserting one end of the flexible circuit board 100 into the slot, the upper surface of the end of the flexible circuit board 100 is closely attached to the suction hole 2211, and then the other end of the flexible circuit board 100 is passed through the pinch roller 3. Since the rotating shaft 21 in the bending assembly 2 can rotate on the processing table 1, the bending shaft 22 is driven to rotate, causing the flexible circuit board 100 to gradually bend on the outer circumference of the bending shaft 22, thereby causing the suction hole 2211 to generate negative pressure, sucking the corresponding end of the flexible circuit board 100. Cooperating with the limiting effect of the L-shaped limiting plate 223, the end of the flexible circuit board 100 is prevented from separating from the silicone skin 221 during the bending process, thereby improving the stability of the suction hole 2211 on the flexible circuit board 100. At the same time, the pinch roller 3 synchronously conveys the flexible circuit board 100 toward the bending shaft 22, so that dynamic tension compensation is formed through the synchronous movement of the pinch roller 3 and the bending shaft 22, which can effectively eliminate the tensile residual stress of the copper foil layer of the flexible circuit board 100 and improve the bending quality of the flexible circuit board 100.

[0031] Optionally, when the bending angle of the flexible circuit board 100 gradually increases, the negative pressure provided by the negative pressure component 5 to the suction hole 2211 also gradually increases.

[0032] In this optional embodiment, combined with Figure 5 、 Figure 6 and Figure 7As shown, the flexible circuit board 100 generates an elastic restoring force when it is bent. As the bending angle of the flexible circuit board 100 gradually increases, this elastic restoring force will also gradually increase. That is, the flexible circuit board 100 tries to return to its original straight state. At this time, when the bending angle of the flexible circuit board 100 gradually increases, the negative pressure provided by the negative pressure component 5 to the suction hole 2211 also gradually increases, so that the corresponding end of the flexible circuit board 100 is tightly adsorbed, thereby improving the stability of the flexible circuit board 100 when bending.

[0033] In this optional embodiment, combined with Figure 4 、 Figure 5 、 Figure 6 and Figure 7 As shown, the silicone skin 221 can be coated on the outer circumference of the bending shaft 22 by hot pressing, and the silicone skin 221 covers half of the outer circumference of the bending shaft 22, for example Figure 5 Before bending, the silicone skin 221 covers the left half of the circumference of the bending shaft 22 , and the suction hole 2211 is opened at the bottom of the silicone skin 221 so that the upper surface of the end of the flexible circuit board 100 can be pressed against the suction hole 2211 .

[0034] Optionally, the bending component 2 also includes an annular sheet 23 and an electric heating wire 24. The annular sheet 23 is connected to the inner circumference of the bending shaft 22. The annular sheet 23 and the inner circumference of the bending shaft 22 enclose an annular cavity. The annular cavity is opposite to the position of the silicone skin 221. The bending shaft 22 is provided with an air outlet 222 connected to the end of the annular cavity. The electric heating wire 24 is arranged in the annular cavity. When the bending shaft 22 drives the flexible circuit board 100 to bend, the negative pressure component 5 is used to provide negative pressure for the suction hole 2211. When the bending shaft 22 is reset, the negative pressure component 5 is used to blow air into the annular cavity.

[0035] In this optional embodiment, combined with Figure 5 and Figure 9 As shown, the bending shaft 22 can be a hollow structure, and the electric heating wire 24 does not work at this time; Figure 6 As shown, the bending shaft 22 rotates counterclockwise to drive the flexible circuit board 100 to gradually adhere to the silicone skin 221. At this time, the electric heating wire 24 starts to work, so that the heat generated by the electric heating wire 24 is radiated to the silicone skin 221 through the bending shaft 22, thereby gradually increasing the temperature of the outer surface of the silicone skin 221. Figure 7 The flexible circuit board 100 is in the final bending state. Figure 5 The state before the bending starts, Figure 6 The state of the bending process in Figure 7In the state where the bending is completed, the temperature of the outer surface of the silicone skin 221 gradually increases, so that the hardness of the silicone skin 221 gradually decreases. In this way, in the first half of the bending (0-90°), the end of the flexible circuit board 100 is adsorbed and fixed to the bottom end of the bending axis 22, forming a fixed constraint. At this time, the initial curvature of the flexible circuit board 100 is close to zero (straight state). At this time, the high-hardness silicone skin 221 can provide it with rigid support to prevent the deformation of the silicone skin 221 itself from causing the starting position of the flexible circuit board 100 to deviate, thereby reducing the error of the starting angle of the bending. In the second half of the bending (90-180°), the compressive strain of the inner copper foil of the flexible circuit board 100 increases sharply. At this time, the low-hardness silicone skin 221 can absorb the compressive strain of the copper foil through its own elastic deformation, so that the compressive deformation of the silicone skin 221 partially converts the strain energy of the copper foil into elastic energy, thereby reducing the residual stress of the flexible circuit board 100 and improving the bending quality.

[0036] Furthermore, the negative pressure component 5 includes an intake and exhaust unit and a co-rotating unit. The intake and exhaust unit includes a piston cylinder 51, a screw shaft 53, an air pipe 54, a branch pipe 56, a two-position three-way valve 57 and a piston. The piston is slidingly connected to the inner wall of the piston cylinder 51, one end of the screw shaft 53 is rotatably connected to one end face of the piston cylinder 51, and the other end of the screw shaft 53 is rotatably connected to the other end face of the piston cylinder 51. The piston is threadedly connected to the screw shaft 53, one end of the air pipe 54 is connected to the piston cylinder 51, and the other end of the air pipe 54 penetrates into the bending shaft 22 and is connected to one end of the branch pipe 56. The other end of the branch pipe 56 is set as two branch pipes, and the two branch pipes are respectively connected to the suction hole 2211 and the annular cavity. The three channel interfaces of the two-position three-way valve 57 are respectively connected to the branch pipe 56 and the ends of the two branch pipes.

[0037] In this optional embodiment, in this optional embodiment, Figure 5 、 Figure 6 and Figure 7 During the bending process of the flexible circuit board 100, Figure 4As shown, the counterclockwise rotation of the bending shaft 22 drives the flexible circuit board 100 to gradually adhere to the outer circumference of the silicone skin 221. At this time, the co-rotating unit drives the rope winding shaft 52 to rotate, thereby driving the screw shaft 53 to rotate synchronously, thereby driving the piston to move. At this time, the two channel interfaces corresponding to the two-position three-way valve 57 are connected, so that the piston cylinder 51 generates negative pressure, thereby generating negative pressure in the suction hole 2211 through the air pipe 54, the branch pipe 56 and the corresponding branch pipe, and the flexible circuit board 100 is adsorbed on the outer circumference of the bending shaft 22. Negative pressure adsorption replaces traditional mechanical clamping, eliminating the risk of indentation or scratching, especially protecting the fine circuits on the surface of the flexible circuit board 100. As the counterclockwise rotation angle of the bending shaft 22 becomes larger and larger, the bending degree of the flexible circuit board 100 becomes larger and larger. The piston continues to move, so that the adsorption force of the suction hole 2211 that has been adsorbed to the surface of the flexible circuit board 100 will become stronger and stronger, so that the bent section of the flexible circuit board 100 continues to be closely attached to the silicone skin 221, avoiding stress concentration caused by local debonding during bending; Figure 8 As shown, after the bending is completed, the electric heating wire 24 stops working and the bending shaft 22 rotates counterclockwise to reset. At this time, the two channel interfaces corresponding to the two-position three-way valve 57 are connected, driving the piston to move, thereby allowing air to flow into the annular cavity through the air pipe 54, the branch pipe 56 and the corresponding branch pipe, blowing air to cool the electric heating wire 24 and discharge it through the air outlet 222, thereby accelerating the cooling of the electric heating wire 24, and then accelerating the silicone skin 221 to return to normal temperature, providing a prerequisite for the next round of bending.

[0038] It should be noted that after the bending shaft 22 is reset, the silicone skin 221 still has residual temperature. At this time, the silicone skin 221 has better elasticity than at room temperature, so the end of the flexible circuit board 100 is inserted more easily.

[0039] Furthermore, the suction and exhaust unit also includes a rope winding shaft 52, which is rotatably connected to the end of the piston cylinder 51, and the rope winding shaft 52 is mounted on the screw shaft 53. One end of the same-direction rotating unit transmission chain is connected to the bending shaft 22, and the other end of the same-direction rotating unit transmission chain is connected to the rope winding shaft 52.

[0040] Furthermore, the co-rotating unit includes two steel wire ropes 55 , one end of the two steel wire ropes 55 is spirally wound on the bending shaft 22 , the other end of the two steel wire ropes 55 is spirally wound on the rope winding shaft 52 , and the two steel wire ropes 55 are arranged in parallel.

[0041] In this optional embodiment, combined with Figure 3 and Figure 4 As shown, the two steel wire ropes 55 can realize the synchronous rotation of the bending shaft 22 and the rope winding shaft 52 in the same direction.

[0042] Furthermore, an exhaust hole is provided on the piston cylinder 51 .

[0043] In this optional embodiment, combined with Figure 3 As shown, by providing an exhaust hole on the piston cylinder 51 , the piston discharges part of the gas in the piston cylinder 51 through the exhaust hole, thereby maintaining the air pressure balance inside and outside the piston cylinder 51 .

[0044] Furthermore, the flexible circuit board bending processing equipment further includes a driving component 4 , which is drivingly connected to the rotating shaft 21 to rotate the rotating shaft 21 .

[0045] In this optional embodiment, combined with Figure 1 and Figure 2 As shown, the driving assembly 4 may include a pushing seat, a rack, a gear, a support seat and a cylinder. The driving assembly 4 for driving the rotating shaft 21 to rotate is listed below. The cylinder is not shown in the figure. The cylinder is fixed to the inside of the processing table 1 through a cylinder mounting seat. The cylinder is driven and connected to the support seat. The support seat is slidably connected to the upper surface of the processing table 1. The rack is connected to the support seat. The gear is mounted on the rotating shaft 21. The rack is meshed with the gear. The rotating shaft 21 is rotatably connected to the support seat. The support seat is fixedly connected to the upper surface of the processing table 1. The support seat is driven to move by the cylinder, and then the rack is driven to move, thereby driving the rotating shaft 21 to rotate through the gear, for example, the rotating shaft 21 is moved from Figure 4 Rotate to Figure 5 Middle position.

[0046] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A bending processing device for flexible circuit boards, characterized in that: include: Processing table (1); A bending assembly (2) is provided on the processing table (1), and the bending assembly (2) comprises a rotating shaft (21) and a bending shaft (22). The rotating shaft (21) is rotatably provided on the processing table (1), and the bending shaft (22) is connected to the rotating shaft (21). A silicone rubber (221) is connected to half of the outer circumference of the bending shaft (22), and a suction hole (2211) is provided on the silicone rubber (221). An L-shaped limiting plate (223) is connected to the bending shaft (22), and a slot for inserting an end portion of the flexible circuit board (100) is formed between the L-shaped limiting plate (223) and the bending shaft (22), and the suction hole (2211) is located in the slot. A pinch roller (3) is provided on the processing table (1), and when the bending shaft (22) drives the flexible circuit board (100) to bend, the pinch roller (3) is used to synchronously convey the flexible circuit board (100) in the direction of the bending shaft (22); and The negative pressure component (5) is used to provide negative pressure for the suction hole (2211).

2. The flexible circuit board bending processing equipment according to claim 1, characterized in that: When the bending angle of the flexible circuit board (100) gradually increases, the negative pressure provided by the negative pressure component (5) to the suction hole (2211) also gradually increases.

3. The flexible circuit board bending processing equipment according to claim 2, characterized in that: A silicone skin (221) is connected to half of the outer circumference of the bending shaft (22), and a suction hole (2211) is provided on the silicone skin (221).

4. The flexible circuit board bending processing equipment according to claim 3, characterized in that: The bending assembly (2) further comprises an annular sheet (23) and an electric heating wire (24). The annular sheet (23) is connected to the inner circumference of the bending shaft (22). The annular sheet (23) and the inner circumference of the bending shaft (22) enclose an annular cavity. The annular cavity is directly opposite to the position of the silicone skin (221). The bending shaft (22) is provided with an air outlet (222) connected to the end of the annular cavity. The electric heating wire (24) is arranged in the annular cavity. When the bending shaft (22) drives the flexible circuit board (100) to bend, the negative pressure assembly (5) is used to provide negative pressure for the suction hole (2211). When the bending shaft (22) is reset, the negative pressure assembly (5) is used to blow air into the annular cavity.

5. The flexible circuit board bending processing equipment according to claim 4, characterized in that: The negative pressure assembly (5) comprises an air intake and exhaust unit and a co-rotating unit. The air intake and exhaust unit comprises a piston cylinder (51), a screw shaft (53), an air pipe (54), a branch pipe (56), a two-position three-way valve (57) and a piston. The piston is slidably connected to the inner wall of the piston cylinder (51). One end of the screw shaft (53) is rotatably connected to one end face of the piston cylinder (51). The other end of the screw shaft (53) is rotatably connected to the other end face of the piston cylinder (51). The piston is threadedly connected to the screw shaft (53). One end of the air pipe (54) is communicated with the piston cylinder (51). The other end of the air pipe (54) penetrates into the bending shaft (22) and is communicated with one end of the branch pipe (56). The other end of the branch pipe (56) is set as two branch pipes. The two branch pipes are respectively communicated with the suction hole (2211) and the annular cavity. The three channel interfaces of the two-position three-way valve (57) are respectively communicated with the branch pipe (56) and the ends of the two branch pipes.

6. The flexible circuit board bending processing equipment according to claim 5, characterized in that: The suction and exhaust unit further comprises a rope winding shaft (52), which is rotatably connected to the end of the piston cylinder (51) and is sleeved on the screw shaft (53). One end of the same-direction rotating unit transmission chain is connected to the bending shaft (22), and the other end of the same-direction rotating unit transmission chain is connected to the rope winding shaft (52).

7. The flexible circuit board bending processing equipment according to claim 5, characterized in that: The co-rotating unit comprises two steel wire ropes (55), one end of the two steel wire ropes (55) is spirally wound on the rotating shaft (21), and the other end of the two steel wire ropes (55) is spirally wound on the rope winding shaft (52), and the two steel wire ropes (55) are arranged in parallel.

8. The flexible circuit board bending processing equipment according to claim 5, characterized in that: The piston cylinder (51) is provided with an exhaust hole.

9. The flexible circuit board bending processing equipment according to any one of claims 1 to 8, characterized in that: The driving assembly (4) is drivingly connected to the rotating shaft (21) to rotate the rotating shaft (21).

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