A flexible circuit board bending processing equipment

Abstract

The application provides a flexible circuit board bending processing equipment, and relates to the field of integrated circuit manufacturing. The flexible circuit board bending processing equipment comprises 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, and the bending shaft being connected with the rotating shaft; a pinch roll arranged on the processing table, the pinch roll being used for synchronously conveying the flexible circuit board to the direction of the bending shaft when the bending shaft drives the flexible circuit board to bend; and a negative pressure assembly used for providing negative pressure for suction holes. The flexible circuit board is gradually bent on the outer circumferential surface of the bending shaft, and at the same time, the pinch roll synchronously conveys the flexible circuit board to the direction of the bending shaft, so that dynamic tension compensation is formed through the synchronous movement of the pinch roll and the bending shaft, the tensile residual stress of the 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 application relates to the field of integrated circuit manufacturing, in particular to a flexible circuit board bending processing equipment. BACKGROUND

[0002] With the rapid development of integrated circuit technology, the thickness of modern electronic devices (such as foldable screen mobile phones and ultra-thin televisions) is continuously reduced due to the lightweight and bendable characteristics of flexible circuit boards (FPCs). The gap between the backlight module and the mainboard is usually very small. FPC needs to be bent with a very small radius and tightly attached to the back of the backlight module to save internal space and avoid affecting the overall thickness of the device due to excessive space occupied by FPC.

[0003] Currently, the flexible circuit board in the display panel requires a smaller bending radius. After bending 180°, it is attached to the backlight module. Due to the large change in radius during the bending process, most traditional bending processing equipment is prone to 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

[0004] To solve the above problems, the present application provides a flexible circuit board bending processing equipment.

[0005] The present application provides a flexible circuit board bending processing equipment, comprising: a processing table; a bending assembly provided on the processing table, the bending assembly comprising a rotating shaft and a bending shaft, the rotating shaft being rotatably provided on the processing table, the bending shaft being connected with the rotating shaft, one half of the outer periphery of the bending shaft being connected with a silica gel skin, the silica gel skin being provided with a suction hole, the bending shaft being connected with an L-shaped limiting plate, the L-shaped limiting plate and the bending shaft forming a slot for inserting the end of the flexible circuit board, the suction hole being located in the slot; a pinch roller provided on the processing table, the pinch roller being used to synchronously transport the flexible circuit board towards the bending shaft when the bending shaft drives the flexible circuit board to bend; and a negative pressure assembly for providing negative pressure to the suction hole.

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

[0007] Optionally, one half of the outer periphery of the bending shaft is connected with a silica gel skin, and the suction hole is provided on the silica gel skin.

[0008] Optionally, the bending assembly further comprises an annular sheet and an electric heating wire, the annular sheet being connected to the inner periphery of the bending shaft, the annular sheet and the inner periphery of the bending shaft enclosing an annular cavity, the annular cavity being opposite to the position of the silica gel skin, the bending shaft being provided with an air outlet hole in communication with the end of the annular cavity, and the electric heating wire being provided in the annular cavity, the negative pressure assembly being used to provide negative pressure to the suction hole when the bending shaft drives the flexible circuit board to bend, and the negative pressure assembly being used to blow air into the annular cavity when the bending shaft resets.

[0009] Optionally, the negative pressure assembly comprises the air suction and exhaust unit and the same direction rotating unit, the air suction and exhaust unit comprises a piston cylinder, a screw rod shaft, an air pipe, a branch pipe, a two-position three-way valve and a piston, the piston is slidably connected with the inner wall of the piston cylinder, one end of the screw rod shaft is rotatably connected with one end surface of the piston cylinder, the other end of the screw rod shaft is rotatably connected with the other end surface of the piston cylinder, the piston is threadedly connected with the screw rod shaft, one end of the air pipe is communicated with the piston cylinder, the other end of the air pipe penetrates into the bending shaft and is communicated with one end of the branch pipe, the other end of the branch pipe is provided with two branch pipes, the two branch pipes are respectively communicated with the suction hole and the annular cavity, the three channel interfaces of the two-position three-way valve are respectively communicated with the end portions of the branch pipe and the two branch pipes.

[0010] Optionally, the air suction and exhaust unit further comprises a rope winding shaft, the rope winding shaft is rotatably connected with the end portion of the piston cylinder and is sleeved on the screw rod shaft, one end of the same direction rotating unit transmission chain is connected with the bending shaft, the other end of the same direction rotating unit transmission chain is connected with the rope winding shaft.

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

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

[0013] Optionally, the flexible circuit board bending processing equipment further comprises a driving assembly, the driving assembly is drivingly connected with the rotating shaft to rotate the rotating shaft.

[0014] The flexible circuit board bending processing equipment has the advantages that one end of the flexible circuit board is inserted into the slot, so that the upper surface of the end portion of the flexible circuit board is tightly attached to the suction hole, and the other end of the flexible circuit board is worn on the pinch roller, the rotating shaft in the bending assembly can rotate on the processing table, thereby driving the bending shaft to rotate, so that the flexible circuit board is gradually bent on the outer peripheral surface of the bending shaft, and the suction hole generates a negative pressure to suck the corresponding end portion of the flexible circuit board, and the limiting effect of the L-shaped limiting plate avoids the end portion of the flexible circuit board from being separated from the silica gel skin during the bending process, thereby improving the stability of the suction hole in adsorbing the flexible circuit board, and at the same time, the pinch roller synchronously transports the flexible circuit board to the direction of the bending shaft, so that dynamic tension compensation is formed 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 DRAWINGS

[0015] Figure 1 FIG. 1 is a structural schematic diagram of the flexible circuit board bending processing equipment according to the embodiment of the present application;

[0016] Figure 2 FIG. 2 is a top view of the flexible circuit board bending processing equipment according to the embodiment of the present application.

[0017] Figure 3 is an enlarged view of the structure at A in Figure 2

[0018] Figure 4 is a structural schematic view of a negative pressure component in a flexible circuit board bending processing equipment according to an embodiment of the present application;

[0019] Figure 5 is a state view of the flexible circuit board bending processing equipment according to an embodiment of the present application before bending starts;

[0020] Figure 6 is a state view of the flexible circuit board bending processing equipment according to an embodiment of the present application during bending;

[0021] Figure 7 is a state view of the flexible circuit board bending processing equipment according to an embodiment of the present application when bending ends;

[0022] Figure 8 is a state view of the flexible circuit board bending processing equipment according to an embodiment of the present application when resetting;

[0023] Figure 9 is an enlarged view of the structure at A in Figure 5

[0024] Reference signs: 1, processing table; 2, bending component; 21, rotating shaft; 22, bending shaft; 221, silica gel skin; 2211, suction hole; 222, air outlet hole; 223, L-shaped limiting plate; 23, annular sheet; 24, electric heating wire; 3, pinch roll; 4, driving component; 5, negative pressure component; 51, piston cylinder; 52, rope winding shaft; 53, screw shaft; 54, air pipe; 55, steel wire rope; 56, branch pipe; 57, two-position three-way valve; 100, flexible circuit board. DETAILED DESCRIPTION

[0025] In order to make the above objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings.

[0026] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms “mounting”, “connection” and “connecting” should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] ​​In the description of the specification, the description of the terms "embodiment", "one embodiment", "some embodiments", "exemplarily" and "one embodiment" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or embodiment are included in at least one embodiment or embodiment of the application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or embodiment. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or embodiments in a suitable manner.

[0028] The embodiment of the application provides a flexible circuit board bending processing equipment, which comprises a processing table 1; a bending assembly 2 arranged on the processing table 1, the bending assembly 2 comprises 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 with the rotating shaft 21, a half outer circumferential surface of the bending shaft 22 is connected with a silica gel skin 221, the silica gel skin 221 is provided with suction holes 2211, the bending shaft 22 is connected with an L-shaped limiting plate 223, the L-shaped limiting plate 223 and the bending shaft 22 form a slot for inserting the end of the flexible circuit board 100, and the suction holes 2211 are located in the slot; a pinch roll 3 arranged on the processing table 1, when the bending shaft 22 drives the flexible circuit board 100 to bend, the pinch roll 3 is used for synchronously conveying the flexible circuit board 100 to the direction of the bending shaft 22; and a negative pressure assembly 5 used for providing negative pressure for the suction holes 2211.

[0029] Specifically, in combination with Figure 4 , Figure 5 , Figure 6 and Figure 7 , the silica gel skin 221 can be wrapped on the outer circumferential surface of the bending shaft 22 by means of hot pressing, and the silica gel skin 221 wraps a half outer circumferential surface of the bending shaft 22, for example Figure 5Before bending, the silicone sheet 221 covers the left half of the circumferential surface of the bending shaft 22. The suction hole 2211 is located at the bottom of the silicone sheet 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 circumferential surface of the silicone sheet 221 form a slot. It should be noted that the thickness of the flexible circuit board 100 is slightly greater than the height of the slot. When the end of the flexible circuit board 100 is inserted into the slot, the silicone sheet 221 has a certain degree of elasticity, which allows the end of the flexible circuit board 100 to be inserted smoothly. Insert the flexible circuit board 100 into the slot, and ensure that both sides of the end of the flexible circuit board 100 are tightly against the inner bottom surface of the suction hole 2211 and the L-shaped limiting plate 223. The clamping roller 3 is used to transport the flexible circuit board 100. For example, the clamping roller 3 has an upper roller and a lower roller. The flexible circuit board 100 is transported between the upper roller and the lower roller. The upper roller and the lower roller can be driven by a stepper motor to control the rotation speed of the upper roller and the lower roller, so that the transport speed of the upper roller and the lower roller matches the rotational angular velocity of the bending shaft 22. When the flexible circuit board 100 is bent to 180° ( Figure 7 In the state of being in the middle, the flexible circuit board 100 is removed and attached to the backlight module (not shown in the figure).

[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 pressed tightly against the suction hole 2211, and the other end of the flexible circuit board 100 is passed through the clamping roller 3. Since the rotating shaft 21 in the bending assembly 2 can rotate on the processing table 1, it drives the bending shaft 22 to rotate, causing the flexible circuit board 100 to gradually bend on the outer circumferential surface of the bending shaft 22. This causes the suction hole 2211 to generate negative pressure, which holds the corresponding end of the flexible circuit board 100. With the limiting effect of the L-shaped limiting plate 223, the end of the flexible circuit board 100 is prevented from detaching from the silicone skin 221 during the bending process, thereby improving the stability of the suction hole 2211 in adsorbing the flexible circuit board 100. At the same time, the clamping roller 3 synchronously transports the flexible circuit board 100 towards the bending shaft 22. Thus, the synchronous movement of the clamping roller 3 and the bending shaft 22 forms dynamic tension compensation, 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, as 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 will generate an elastic recovery force when being bent, and this elastic recovery force will gradually increase as the bending angle of the flexible circuit board 100 gradually increases, that is, the flexible circuit board 100 tries to restore to the original flat state, at this time, as the bending angle of the flexible circuit board 100 gradually increases, the negative pressure provided by the negative pressure assembly 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 being bent.

[0033] In this optional embodiment, in combination with Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the silica gel skin 221 can be wrapped on the outer circumferential surface of the bending shaft 22 by hot pressing, and the silica gel skin 221 wraps half of the outer circumferential surface of the bending shaft 22, for example Figure 5 Before bending, at this time the silica gel skin 221 is wrapped on the left half of the circumferential surface of the bending shaft 22, and the suction hole 2211 is opened at the bottommost position of the silica gel skin 221, so that the upper surface of the end of the flexible circuit board 100 can be pressed on the suction hole 2211.

[0034] Optionally, 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 circumferential surface of the bending shaft 22, the annular sheet 23 and the inner circumferential surface of the bending shaft 22 form an annular cavity, the annular cavity is opposite to the position of the silica gel skin 221, the bending shaft 22 is provided with an air outlet hole 222 communicating with the end of the annular cavity, and 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 to the suction hole 2211, and when the bending shaft 22 resets, the negative pressure assembly 5 is used to blow air into the annular cavity.

[0035] In this optional embodiment, in combination with Figure 5 and Figure 9 As shown, the bending shaft 22 can be a hollow structure, at this time the electric heating wire 24 does not work; in combination with Figure 6 As shown, the bending shaft 22 rotates counterclockwise to drive the flexible circuit board 100 to gradually adhere to the silica gel 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 silica gel skin 221 through the bending shaft 22, thereby gradually increasing the temperature of the outer surface of the silica gel skin 221, Figure 7 is a state diagram of the flexible circuit board 100 when the bending is finished, the flexible circuit board 100 is from the state before the bending in Figure 5 , to the state of the bending process in Figure 6 , and to Figure 7The end of the bending in the state, due to the gradual increase of the temperature of the outer surface of the silica gel skin 221, the hardness of the silica gel skin 221 gradually decreases, so that in the first half of the bending (0-90°), the end of the flexible circuit board 100 is adsorbed and fixed at the bottom end of the bending shaft 22, forming a fixed constraint, at this time the initial curvature of the flexible circuit board 100 tends to zero (flat state), at this time the high hardness of the silica gel skin 221 can provide rigid support for it, prevent the silica gel skin 221 from deforming itself to cause the initial position of the flexible circuit board 100 to deviate, reduce the bending starting angle error, in the second half of the bending (90-180°), the compression strain of the inner layer copper foil of the flexible circuit board 100 increases sharply, at this time, the low hardness of the silica gel skin 221 can absorb the compression strain of the copper foil by its elastic deformation, so that the compression deformation of the silica gel skin 221 converts part of 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] Further, the negative pressure assembly 5 includes a suction and exhaust unit and a same-rotation unit. The suction 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 in sliding connection with the inner wall of the piston cylinder 51. One end of the screw shaft 53 is in rotational connection with one end face of the piston cylinder 51, and the other end of the screw shaft 53 is in rotational connection with the other end face of the piston cylinder 51. The piston is in threaded connection with the screw shaft 53. One end of the air pipe 54 is in communication with the piston cylinder 51, and the other end of the air pipe 54 penetrates into the bending shaft 22 and is in communication with one end of the branch pipe 56. The other end of the branch pipe 56 is provided with two branch pipes, which are in communication with the suction hole 2211 and the annular cavity, respectively. The three channel interfaces of the two-position three-way valve 57 are in communication with the end portions of the branch pipe 56 and the two branch pipes, respectively.

[0037] In this optional embodiment, in this optional embodiment, Figure 5 , Figure 6 and Figure 7 for the bending process of the flexible circuit board 100, in combination with Figure 4As shown, the bending shaft 22 rotates counterclockwise to gradually adhere the flexible circuit board 100 to the outer circumferential surface of the silica rubber 221, at this time, the co-rotating unit drives the 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-way three-way valve 57 is connected to the two channel interfaces, 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 circumferential surface of the bending shaft 22, and the negative pressure adsorption is used instead of the traditional mechanical clamping, which eliminates the risk of indentation or scratch, especially protects the fine circuit on the surface of the flexible circuit board 100, and as the angle of the counterclockwise rotation of the bending shaft 22 becomes larger, the bending degree of the flexible circuit board 100 becomes larger, and the piston continues to move, so that the adsorption force of the suction hole 2211 adsorbed on the surface of the flexible circuit board 100 becomes stronger, so that the bending segment of the flexible circuit board 100 continues to closely adhere to the silica rubber 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-way three-way valve 57 is connected to the two channel interfaces, driving the piston to move, thereby passing the air into the annular cavity through the air pipe 54, the branch pipe 56 and the corresponding branch pipe, blowing and cooling the electric heating wire 24, and discharging through the air outlet hole 222, thereby accelerating the cooling of the electric heating wire 24, and further accelerating the silica rubber 221 to restore to normal temperature, thereby providing a prerequisite for the next bending.

[0038] It should be noted that after the bending shaft 22 is reset, the silica rubber 221 still has residual heat, at this time, the silica rubber 221 is more elastic than the normal temperature state, so that the end of the flexible circuit board 100 is easier to insert when inserted.

[0039] Further, the suction and exhaust unit further comprises a winding shaft 52, the winding shaft 52 is rotatably connected to the end of the piston cylinder 51, and the winding shaft 52 is sleeved on the screw shaft 53, one end of the co-rotating unit transmission chain is connected with the bending shaft 22, and the other end of the co-rotating unit transmission chain is connected with the winding shaft 52.

[0040] Further, the co-rotating unit comprises two steel wires 55, one end of the two steel wires 55 is spirally wound on the bending shaft 22, the other end of the two steel wires 55 is spirally wound on the winding shaft 52, and the two steel wires 55 are arranged in parallel.

[0041] In this optional embodiment, the co-rotating unit comprises two steel wires 55, one end of the two steel wires 55 is spirally wound on the bending shaft 22, the other end of the two steel wires 55 is spirally wound on the winding shaft 52, and the two steel wires 55 are arranged in parallel. Figure 3 As shown, the two steel wires 55 can realize the co-rotation and synchronization of the bending shaft 22 and the winding shaft 52. Figure 4

[0042] Further, the piston cylinder 51 is provided with an exhaust hole. ​

[0043] In this optional embodiment, in combination with Figure 3 As shown in the figure, by setting the exhaust hole on the piston cylinder 51, the piston discharges part of the gas in the piston cylinder 51 from the exhaust hole, maintaining the balance of the gas pressure inside and outside the piston cylinder 51.

[0044] Further, the flexible circuit board bending processing equipment further comprises a driving assembly 4, the driving assembly 4 is drivingly connected with the rotating shaft 21 to rotate the rotating shaft 21.

[0045] In this optional embodiment, in combination with Figure 1 With Figure 2 As shown in the figure, the driving assembly 4 can include a push seat, a rack, a gear, a support seat and a cylinder, and the driving assembly 4 driving the rotating shaft 21 is listed below. The cylinder is fixed in the inside of the processing table 1 through a cylinder mounting seat, and is drivingly connected with the support seat. The support seat is slidingly connected to the upper surface of the processing table 1. The rack is connected to the support seat. The gear is sleeved on the rotating shaft 21. The rack is meshingly connected 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 moved by the cylinder, and then the rack is moved, so that the rotating shaft 21 is rotated by the gear, for example, the rotating shaft 21 is rotated from Figure 4 to Figure 5 the middle position.

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

Claims

1. A bending processing equipment for flexible circuit boards, characterized in that, The utility model relates to a flexible circuit board bending device, including: processing platform (1); Bending assembly (2) is located processing platform (1), and bending assembly (2) includes rotary shaft (21) and bending shaft (22), rotary shaft (21) rotatably located processing platform (1), and bending shaft (22) is connected with rotary shaft (21), and one half outer circumferential surface of bending shaft (22) is connected with silica gel skin (221), and silica gel skin (221) is equipped with suction hole (2211), and L-shaped limit board (223) is connected on bending shaft (22), and the insertion slot for the end of flexible circuit board (100) is formed between L-shaped limit board (223) and bending shaft (22), and suction hole (2211) is located in insertion slot; Pinch roll (3) is located processing platform (1), and when bending shaft (22) drives flexible circuit board (100) to bend, pinch roll (3) is used for synchronous delivery flexible circuit board (100) to the direction of bending shaft (22);And Negative pressure assembly (5) is used for providing negative pressure for suction hole (2211); When the bending angle of flexible circuit board (100) gradually increases, the negative pressure provided by negative pressure assembly (5) for suction hole (2211) also gradually increases; Bending assembly (2) still includes annular sheet (23) and electric heating wire (24), annular sheet (23) is connected to the inner circumferential surface of bending shaft (22), and annular sheet (23) and the inner circumferential surface of bending shaft (22) surround and form annular cavity, and annular cavity is opposite the position of silica gel skin (221), and bending shaft (22) is equipped with air outlet hole (222) with annular cavity end communication, and electric heating wire (24) is located in annular cavity, and when bending shaft (22) drives flexible circuit board (100) to bend, negative pressure assembly (5) is used for providing negative pressure for suction hole (2211), and when bending shaft (22) resets, negative pressure assembly (5) is used for blowing gas into annular cavity.

2. The apparatus for flexible circuit board bending processing according to claim 1, wherein Negative pressure assembly (5) includes air suction and exhaust unit and same direction rotation unit, air suction and exhaust unit includes piston cylinder (51), screw shaft (53), air pipe (54), branch pipe (56), two-position three-way valve (57) and piston, the inner wall of piston cylinder (51) is slidably connected with the piston, one end of screw shaft (53) is rotatably connected with one end surface of piston cylinder (51), the other end of screw shaft (53) is rotatably connected with the other end surface of piston cylinder (51), the piston is threadedly connected on screw shaft (53), one end of air pipe (54) is communicated with piston cylinder (51), the other end of air pipe (54) penetrates into bending shaft (22) and is communicated with one end of branch pipe (56), the other end of branch pipe (56) is provided with two branch pipes, two branch pipes are communicated with suction hole (2211) and annular cavity respectively, three passage interfaces of two-position three-way valve (57) are communicated with the end of branch pipe (56), two branch pipes respectively.

3. The apparatus for flexible circuit board bending processing according to claim 2, wherein Air suction and exhaust unit still includes winding rope shaft (52), winding rope shaft (52) is rotatably connected with the end of piston cylinder (51), and winding rope shaft (52) is sleeved on screw shaft (53), one end of same direction rotation unit transmission chain is connected with bending shaft (22), and the other end of same direction rotation unit transmission chain is connected with winding rope shaft (52).

4. The apparatus for flexible circuit board bending processing according to claim 3, wherein The same direction rotation unit comprises two steel wires (55), one end of the two steel wires (55) is spirally wound on the rotation shaft (21), the other end of the two steel wires (55) is spirally wound on the winding shaft (52), and the two steel wires (55) are arranged in parallel.

5. The apparatus for flexible circuit board bending processing according to claim 2, wherein The piston cylinder (51) is provided with an exhaust hole.

6. The apparatus for the bending process of a flexible circuit board according to any one of claims 1 to 5, wherein The flexible circuit board bending processing equipment further comprises a driving assembly (4) which is drivingly connected with the rotation shaft (21) to rotate the rotation shaft (21).

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