A flexible FPC support strip multiple bending machine and bending process thereof

Abstract

The present invention discloses a multiple bending machine for a flexible FPC support strip and a bending process thereof, comprising an FPC support platform, a bearing mechanism, and a bending portion. The FPC support platform is erected on a chassis in a straight line, and the flexible FPC is placed on the FPC support platform; the bearing mechanism is vertically connected to the outer side of the FPC support platform; the bending portion is arranged in the installation space of the chassis; the bending portion includes a first bending mechanism, a second bending mechanism, and a third bending mechanism that can move linearly and rotationally in a horizontal plane; the first bending mechanism supports the strip and then flips 180° along the first bending line; the second bending mechanism clamps the strip after the first bending and then flips 180° to complete the second bending; the third bending mechanism clamps the strip after the second bending and then flips 180° to complete the third bending. The present invention realizes multiple automatic bending at different positions and angles on the same strip, avoids local warping during the bending process, improves the accuracy of the bending position, accurately controls the bending thickness and bending curvature, and improves the surface flatness of the strip after bending.

Description

Technical Field

[0001] The present invention relates to the field of flexible printed circuit board (FPC) manufacturing equipment, in particular to a flexible FPC support strip multiple bending machine and a bending process thereof. Background Art

[0002] Flexible printed circuits, also known as "FPCs," are printed circuit boards made from a flexible insulating substrate. FPCs offer excellent electrical performance, meeting the demands of smaller and higher-density designs, while also helping to reduce assembly steps and enhance reliability. FPCs can be bent, rolled, and folded freely, enduring millions of dynamic bends without damaging the conductors. They can be arranged arbitrarily to meet spatial layout requirements and moved and expanded in three dimensions, integrating component assembly and wiring connections. They can also significantly reduce the size and weight of electronic products, meeting the needs of the trend toward higher density, miniaturization, and higher reliability.

[0003] In the actual manufacturing process, it is necessary to bend and overlap the support strips on the flexible FPC strip. Furthermore, in the actual manufacturing process, it is necessary to perform multiple bending on the support strips of the flexible FPC. The existing technology cannot solve the problem of multiple bending at different positions and angles of the flexible FPC support strips. In addition, due to the flexible characteristics of the flexible FPC itself, the bending accuracy cannot be accurately guaranteed during the bending process, that is, the linearity of the connecting line between the bent part and the unbent part on the flexible FPC after the bending line is bent cannot be guaranteed during the bending process, and the bending line after bending often bends, which will cause the strip to be unable to be accurately bent to the required position. The technical means adopted in the existing technology are generally to set an adsorption platform according to the shape of the required bending position, to adsorb and fix the strip of the unbent part of the flexible FPC, and then bend the strip of the bent part. Due to the instability of the vacuum adsorption force, this fixing method cannot completely avoid the local warping and other position deviations caused by the internal stress of the strip itself during the bending process. In addition, the flexible FPC after bending generally needs to be bonded and fixed to each other by adhesives such as foam. The foam is generally set at the side attachment of the bending line and is pre-attached to the belt on one side of the bending line. The two layers of the belt after bending are fixed by the foam in the middle. Due to the thickness of the foam itself, there is actually a gap between the two layers of the belt after bending. If the bending curvature during bending is greater than the thickness of the foam, the bending part will be loose and the surface flatness of the belt after bending will be uneven; if the bending curvature during bending is less than the thickness of the foam, the belt cannot be bent to the desired position; therefore, during the bending process, it is also necessary to accurately control the bending curvature at the bending line to accurately bend the belt to the desired position and ensure the flatness of the belt surface after bending. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to address the deficiencies of the above-mentioned existing technologies and provide a flexible FPC support strip multiple bending machine and its bending process using a movable pressing pin as an angle control structure during the bending process, so as to realize multiple automatic bending at different positions and angles of the same support strip, and realize local compression at the bending line during the bending process, thereby avoiding local warping during the bending process, improving the bending position accuracy, and accurately controlling the bending thickness and bending curvature through the outer diameter of the pressing pin, thereby improving the surface flatness of the strip body after bending.

[0005] The technical solution adopted by the present invention is as follows: a machine for bending the support strips of flexible FPC multiple times, comprising a chassis with an installation space inside, an FPC support, a carrying mechanism and a bending part, wherein the FPC support is erected on the chassis in a straight line direction, and the flexible FPC is placed on the FPC support; the flexible FPC comprises an FPC belt body and a support strip, the support strips are connected to one side of the FPC belt body in parallel and at intervals, and the support strips are provided with a first bending line, a second bending line and a third bending line with an angle of 45° to the side direction thereof; the carrying mechanism is vertically connected to the outer side of the FPC support for carrying the support strip after bending; the bending part is arranged in the installation space of the chassis and extends to the top of the chassis; the bending part comprises a first bending line that moves linearly and rotationally in a horizontal plane Bending mechanism, a second bending mechanism and a third bending mechanism; after the first bending mechanism clamps the support belt at the outer end of the first bending line, the first pressure needle is inserted into the first bending line, and the support belt at the outer end of the first bending line is driven to turn 180° along the first bending line with the first pressure needle as the rotation axis to complete the first bending. The support belt after the first bending is supported by the bearing mechanism; the second bending mechanism clamps the support belt after the first bending, and the second pressure needle is inserted into the second bending line, and the support belt is driven to turn 180° along the second bending line with the second pressure needle as the rotation axis to complete the second bending; the third bending mechanism clamps the support belt after the second bending, and the third pressure needle is inserted into the third bending line, and the support belt is driven to turn 180° along the third bending line with the third pressure needle as the rotation axis to complete the third bending.

[0006] Preferably, the FPC support is a strip-shaped load-bearing platform for horizontally supporting the FPC belt body; a load-bearing block with a strip-shaped groove is provided at intervals on one side of the FPC support for horizontally supporting the support belt, and the support belt at the outer end of the first bending line is suspended on the side of the load-bearing block so as to be clamped by the first bending mechanism.

[0007] Preferably, the bearing mechanism includes a bearing assembly and an adsorption assembly, wherein the bearing assembly is arranged on the chassis and outputs linear power in a direction perpendicular to the FPC support to adjust the bearing position, and the bearing assembly horizontally carries the bent support belt; the adsorption assembly is arranged on the bearing assembly and outputs power in a vertical direction to adsorb and fix the end of the support belt from above; the bearing assembly includes a bearing support, a bearing transverse cylinder, a bearing support plate and a bearing block, wherein the bearing support is horizontally arranged on the chassis; the bearing transverse cylinder is arranged in a direction perpendicular to the FPC support and moves along the direction Output linear power; the bearing support plate is vertically arranged and slidably connected to the bearing transverse movement cylinder, and is connected to the output end of the bearing transverse movement cylinder; the bearing block is horizontally arranged at the top end of the bearing support plate, and at least two material taking grooves are spaced apart on one side of the bearing block to form a tooth-like structure so that the first bending mechanism can avoid the air and clamp the support belt; the adsorption component includes an adsorption cylinder and a suction nozzle, wherein the adsorption cylinder is vertically arranged on the side wall of the bearing support plate, and the output end is arranged upward; the suction nozzle is connected to the output end of the adsorption cylinder and is arranged downward so that it can adsorb and fix the end after approaching the end from above.

[0008] Preferably, the bending part also includes a horizontal moving mechanism and a rotating mechanism, wherein the horizontal moving mechanism is arranged in the chassis and outputs linear power in the longitudinal and transverse directions in the horizontal plane; the rotating mechanism is arranged on the output end of the horizontal moving mechanism and extends upward to the surface of the chassis to form a horizontal support plane, and the rotating mechanism outputs rotational power in the horizontal plane to drive the horizontal support plane to rotate; the first bending mechanism, the second bending mechanism and the third bending mechanism are arranged on the horizontal support plane.

[0009] Preferably, the first bending mechanism includes a first oblique push assembly, a first bending assembly, a first pressure needle assembly and a first pressure holding assembly, wherein the first oblique push assembly outputs power in a direction perpendicular to the FPC support platform; the first bending assembly is arranged on the first oblique push assembly along a direction at a 45° angle to the first oblique push assembly, and outputs rotational power in a vertical plane, and the first clamping component of the first bending assembly is arranged perpendicular to the first oblique push assembly, and is used to clamp the support belt and drive the support belt to flip 180°; the first pressure needle assembly is inserted into the first bending assembly, and outputs linear power in a direction at a 45° angle to the first oblique push assembly, which is used to drive its first pressure needle to extend into the first bending line, so that the first pressure needle presses the support belt along the first bending line, so as to serve as the rotation axis when the support belt is rotated and bent; the first pressure holding assembly is arranged in the rotating part and the non-rotating part of the first bending assembly, and the first pressure holding assembly after bending is respectively located on the upper and lower sides of the bending point of the support belt, and outputs power in the vertical direction, so as to press the bending point of the support belt from the upper and lower sides for maintaining pressure.

[0010] Preferably, the first oblique thrust assembly includes a first oblique drive cylinder and a first support, wherein the first oblique drive cylinder is horizontally arranged in a direction perpendicular to the FPC support platform and outputs linear power along this direction; the first support is slidably arranged on the first oblique drive cylinder and connected to the output end of the first oblique drive cylinder, and a first support plate is vertically arranged on the first support, and the first support plate is arranged in a direction with an angle of 45° with the first oblique drive cylinder; the first bending assembly includes a first bending cylinder, a first rotating block, a first rotating seat and a first clamping component, wherein the first bending cylinder is arranged on a side wall of the first support plate and outputs rotational power in a vertical plane; the first rotating block is connected to the output end of the first bending cylinder; the first rotating seat is connected to the side wall of the first rotating block and extends in a direction perpendicular to the first oblique drive cylinder; the first clamping component is arranged on the first rotating seat and outputs power in a vertical direction for clamping the support belt.

[0011] Preferably, the first pressure needle assembly includes a first pressure needle cylinder, a first pressure needle shaft and a first pressure needle, wherein the first pressure needle cylinder is arranged on the other side wall of the first support plate and outputs power in a direction perpendicular to the first support plate; the first pressure needle shaft is connected to the output end of the first pressure needle cylinder, and extends horizontally through the first support plate, the first bending cylinder and the first rotating block, and is driven by the first pressure needle cylinder to move freely in a straight line direction; the first pressure needle is connected to the end of the first pressure needle shaft, and the first pressure needle is coaxially arranged with the rotation center axis of the first rotating block.

[0012] Preferably, the first pressure-keeping assembly includes a first lower pressure-keeping cylinder, a first lower pressure-keeping block, a first upper pressure-keeping cylinder and a first upper pressure-keeping block, wherein the first lower pressure-keeping cylinder is arranged on the first rotating seat and outputs power in the vertical direction; the first lower pressure-keeping block is connected to the output end of the first lower pressure-keeping cylinder; the first upper pressure-keeping cylinder is connected to the first bending cylinder through a connecting plate, and the output end is arranged downward; the first upper pressure-keeping block is connected to the output end of the first upper pressure-keeping cylinder; after the first lower pressure-keeping cylinder and the first lower pressure-keeping block complete the first bending with the first rotating seat, they rotate to the bottom of the support belt; the first lower pressure-keeping cylinder and the first upper pressure-keeping cylinder respectively output power to drive the first lower pressure-keeping block and the first upper pressure-keeping block to press the first bending line of the support belt from the bottom and the top, which is used to press and pressure the bending parts that overlap each other after bending.

[0013] Preferably, the second bending mechanism includes a second oblique push assembly, a second bending assembly, a second pressure needle assembly and a second pressure holding assembly, wherein the second oblique push assembly outputs power in a direction perpendicular to the FPC support platform; the second bending assembly is arranged on the second oblique push assembly along a direction at a 45° angle to the second oblique push assembly, and outputs rotational power in a vertical plane, and the second clamping part of the second bending assembly is arranged perpendicular to the second oblique push assembly, and is used to clamp the support belt and drive the support belt to flip 180°; the second pressure needle assembly is inserted into the second bending assembly, and outputs linear power in a direction at a 45° angle to the second oblique push assembly, which is used to drive its second pressure needle to extend into the second bending line, so that the second pressure needle presses the support belt along the second bending line, so as to serve as the rotation axis when the support belt is rotated and bent; the second pressure holding assembly is arranged at the rotating part and the non-rotating part of the first bending assembly, and the second pressure holding assembly after bending is respectively located on the upper and lower sides of the bending point of the support belt, and outputs power in the vertical direction, so as to press the bending point of the support belt from the upper and lower sides for maintaining pressure.

[0014] Preferably, the third bending mechanism includes a third support, a third bending assembly, a third pressure needle assembly and a third pressure holding assembly, wherein the third support is arranged in a direction perpendicular to the FPC support; the third bending assembly is arranged on the third support at a direction at a 45° angle to the third support, and outputs rotational power in a vertical plane, and the third clamping component of the third bending assembly is arranged in the same direction as the third support, for clamping the support belt and driving the support belt to flip 180°; the third pressure needle assembly is inserted into the third bending assembly and outputs linear power in a direction at a 45° angle to the third support, for driving its third pressure needle to extend into the third bending line, so that the third pressure needle presses the support belt along the third bending line, so as to serve as the rotation axis when the support belt is rotated and bent; the third pressure holding assembly is arranged at the rotating part and the non-rotating part of the third bending assembly, and the third pressure holding assembly after bending is respectively located on the upper and lower sides of the bending part of the support belt, and outputs power in the vertical direction, so as to press the bending part of the support belt from the upper and lower sides for pressure holding.

[0015] A bending process of a flexible FPC support tape multiple bending machine is characterized by comprising the following process steps:

[0016] S1. Flexible FPC support: The flexible FPC to be bent is placed on the FPC support, with the outer end of the support strip located at the first bending line in a suspended state;

[0017] S2. Position adjustment: The horizontal moving mechanism and the rotating mechanism of the bending part adjust the position of the first bending mechanism so that it is close to the position of the branch belt in the suspended state in step S1;

[0018] S3, first bending: the first bending assembly of the first bending mechanism clamps the branch belt in the suspended state in step S1 up and down; the first pressing needle assembly drives the first pressing needle to extend to the first bending line, and presses the branch belt along the first bending line. The first bending assembly then drives the branch belt to turn 180° around the first pressing needle, completing the first bend;

[0019] S4, first bending and pressure holding: After the support strips in step S3 complete the first bending, the position of the first bending mechanism is adjusted so that the first pressure holding assembly is aligned vertically at the first bending line. The first pressure holding assembly then presses the overlapping support strips at the first bending line upward and downward to perform pressure holding.

[0020] S5, second bending: After the first bending and pressure holding is completed in step S4, the position of the second bending mechanism is adjusted so that the second bending component is close to and clamps the branch belt after the first bending; the second pressing needle assembly drives the second pressing needle to extend to the second bending line, and presses the branch belt along the second bending line. The second bending assembly drives the branch belt to turn 180° around the second pressing needle to complete the second bending;

[0021] S6, second bending and pressure holding: After the support strips in step S5 are bent for the second time, the position of the second bending mechanism is adjusted so that the second pressure holding component is aligned with the second bending line. The second pressure holding component then presses the overlapping support strips at the second bending line to maintain pressure.

[0022] S7, third bending: After the second bending and pressure holding is completed in step S6, the third bending mechanism rotates to be close to the FPC support, and the linear position is adjusted so that its third bending component is close to and clamps the support strip after the second bending; the third pressing needle assembly extends to the third bending line, and presses the support strip along the third bending line. The third bending assembly drives the support strip to turn 180° around the third pressing needle to complete the third bending;

[0023] S8, third bending and pressure holding: After the support strip in step S7 completes the third bending, adjust the position of the third bending mechanism so that the third pressure holding component is aligned with the third bending line. The third pressure holding component presses the overlapping support strips at the third bending line up and down to perform compression and pressure holding.

[0024] The beneficial effects of the present invention are:

[0025] In view of the defects and shortcomings of the existing technology, the present invention independently developed and designed a flexible FPC branch strip multiple bending machine and its bending process, which uses a movable pressing pin as an angle control structure in the bending process, so as to realize multiple automatic bending at different positions and angles of the same branch strip of the flexible FPC, and realizes local compression at the bending line during the bending process, thereby avoiding local warping during the bending process, improving the bending position accuracy, and accurately controlling the bending thickness and bending curvature through the outer diameter of the pressing pin, thereby improving the surface flatness of the strip body after bending.

[0026] The present invention is applied to the field of automatic bending of flexible FPC support tapes at different positions and angles, aiming to provide a method of achieving automatic bending while having good versatility, and being able to further improve the bending curvature, position accuracy and surface flatness of the tape after bending by effectively solving the problems of bending warping and bending curvature under the premise of meeting the requirements of different flexible FPC support tape bending processes; the present invention as a whole uses a chassis with an installation space inside as a bearing structure, a bending part is provided in the installation space, an FPC support is provided on the upper part of the chassis in front of the bending part, and a bearing mechanism perpendicular to it is provided on the front side of the FPC support. During the overall bending process, the flexible FPC to be bent is placed horizontally on the FPC support, and the tape body of the flexible FPC is carried by the FPC support and downwardly sucked by the vacuum nozzle arranged thereon. The flexible FPC strip to be bent is adsorbed and fixed, and is located on its front side. Before bending, it is arranged parallel to and spaced apart from the FPC strip body, and is horizontally supported by the bearing block of the FPC support. The part to be bent is in a suspended state; the bending part includes a horizontal moving mechanism and a rotating mechanism arranged inside the chassis, and a first bending mechanism, a second bending mechanism and a third bending mechanism arranged on the rotating mechanism. The horizontal moving mechanism provides linear power in the longitudinal and transverse directions in the horizontal plane, which is used to adjust the real-time position during the bending process; the rotating mechanism is used to provide rotational power in the horizontal plane, which is used to adjust the real-time angle during the bending process; the first bending mechanism, the second bending mechanism and the third bending mechanism are actuators for performing three bends on the strip; the bearing mechanism arranged on the front side of the FPC is used to carry and support the bent strip.

[0027] The special feature of the present invention is that it automatically bends the support belt along the first, second and third bending lines with an angle of 45 degrees to the side of the belt body, and automatically supports the bent support belt through the corresponding supporting mechanism that can adjust its position in real time. At the same time, based on the bending principle that the support belt needs to be clamped and fixed before bending and then driven to rotate, in order to avoid movement interference with the supporting mechanism during the clamping process of the support belt (under normal circumstances, when the support belt is supported by the horizontal supporting surface of the supporting mechanism, the bottom of the support belt is supported by the supporting mechanism, so movement occurs). Dynamic interference cannot be clamped by the bending mechanism), the side of the supporting block of the supporting mechanism used to support the support belt adopts a toothed structure design, that is, a plurality of material taking slots are spaced apart on its side, and the upper and lower sides of the support belt at the material taking slots are in an open state. At the same time, the second bending mechanism and the third bending mechanism cooperate to adopt the toothed structure of the first air-avoiding clamping slot and the second air-avoiding clamping slot (the first bending mechanism does not need this structural design because it does not need to clamp the support belt on the supporting mechanism). During the clamping process, the support belt is clamped from the material taking slot by interlacing with the material taking slot, thereby effectively avoiding the problem of motion interference. Furthermore, the first bending mechanism, the second bending mechanism and the third bending mechanism of the present invention use pressure pins (including the first pressure pin, the second pressure pin and the third pressure pin) as the rotation center axis during bending. The function of the pressure pins is to achieve downward pressure and fixation of the bending line of the flexible FPC belt during the bending process, thereby reducing the situation where the belt is locally warped during bending and affects its position accuracy. At the same time, when bending, the belt uses the pressure pin as the rotation center axis, gradually covers the outer wall of the pressure pin to complete the bending, and realizes precise control of the thickness of the bending arc through the outer diameter of the pressure pin. In addition, this bending method that uses the pressure pin to assist in providing the bending rotation center can achieve bending at any angle on the belt by adjusting the angle range between the pressure pin and the belt. It can adapt to various angle bending scenarios of the flexible FPC belt and has good versatility. Specifically, in order to achieve the above functions, the pressure needle of the present invention is perpendicular to the bending rotation plane (that is, the plane on which the bending assembly drives the flexible FPC to rotate after clamping it), and can movably pass through the bending assembly. The bending action of the bending assembly does not affect the position of the pressure needle, that is, the bending rotation action and the pressure needle do not produce motion interference, and the pressure needle is coaxially arranged with the rotation center of the bending assembly, that is, the bending assembly drives the flexible FPC to complete the rotational bending action with the straight line where the pressure needle is located as the rotation center; at the same time, the pressure needle is retractable in the straight line direction so that it can extend into or away from the bending line of the flexible FPC strip before and after bending.Furthermore, due to the influence of the internal stress of the flexible FPC strip, the strip will have a rebound tendency after being bent, resulting in bending failure. In order to ensure the stability of the adhesion between the strips after bending and overlapping through foam, the bending assembly of the present invention is also provided with a pressure-holding mechanism. By respectively arranging the upper and lower parts of the pressure-holding mechanism on the rotating part and the non-rotating part of the bending assembly, the pressure-holding mechanism arranged on the non-rotating part is pre-installed and adjusted above the bending line after bending, and the pressure-holding mechanism arranged on the rotating part is located below the flexible FPC strip after following the rotation and bending of the bending assembly. By outputting linear power, the flexible FPC strip is pressed from the upper and lower sides of the bending line, thereby achieving pressure maintenance on the bent strip, effectively overcoming the internal stress of the strip, and maintaining the position accuracy of the bent strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is one of the three-dimensional structural diagrams of the present invention.

[0029] Figure 2 This is the second schematic diagram of the three-dimensional structure of the present invention.

[0030] Figure 3 This is the third schematic diagram of the three-dimensional structure of the present invention.

[0031] Figure 4 This is the fourth schematic diagram of the three-dimensional structure of the present invention.

[0032] Figure 5 This is a schematic diagram of the bending state of the flexible FPC support tape of the present invention.

[0033] Figure 6 It is a schematic diagram of the three-dimensional structure of the flexible FPC of the present invention.

[0034] Figure 7 It is a schematic diagram of the three-dimensional structure of the carrying mechanism and the flexible FPC of the present invention.

[0035] Figure 8 This is one of the three-dimensional structural diagrams of the carrying mechanism of the present invention.

[0036] Figure 9 This is the second schematic diagram of the three-dimensional structure of the carrying mechanism of the present invention.

[0037] Figure 10 This is one of the three-dimensional structural schematic diagrams of the bending part of the present invention.

[0038] Figure 11 This is the second schematic diagram of the three-dimensional structure of the bending part of the present invention.

[0039] Figure 12 This is the third schematic diagram of the three-dimensional structure of the bending part of the present invention.

[0040] Figure 13This is one of the three-dimensional structural schematic diagrams of the first bending mechanism of the present invention.

[0041] Figure 14 This is the second schematic diagram of the three-dimensional structure of the first bending mechanism of the present invention.

[0042] Figure 15 This is the third schematic diagram of the three-dimensional structure of the first bending mechanism of the present invention.

[0043] Figure 16 This is one of the three-dimensional structural schematic diagrams of the second bending mechanism of the present invention.

[0044] Figure 17 This is the second schematic diagram of the three-dimensional structure of the second bending mechanism of the present invention.

[0045] Figure 18 This is the third schematic diagram of the three-dimensional structure of the second bending mechanism of the present invention.

[0046] Figure 19 This is one of the three-dimensional structural schematic diagrams of the third bending mechanism of the present invention.

[0047] Figure 20 This is the second schematic diagram of the three-dimensional structure of the third bending mechanism of the present invention.

[0048] Figure 21 This is the third schematic diagram of the three-dimensional structure of the third bending mechanism of the present invention.

[0049] In the picture:

[0050] 0, flexible FPC; 01, FPC strip; 02, branch strip; 03, terminal; a, first bending line; b, second bending line; c, third bending line;

[0051] 1. Chassis; 2. FPC support;

[0052] 3. Carrying mechanism; 31. Carrying support; 32. Carrying traverse cylinder; 33. Carrying support plate; 34. Carrying block; 35. Adsorption cylinder; 36. Suction nozzle; D. Material chute;

[0053] 4. Horizontal movement mechanism; 5. Rotation mechanism;

[0054] 6. First bending mechanism; 61. First oblique drive cylinder; 62. First support; 63. First pressure needle cylinder; 64. First pressure needle shaft; 65. First pressure needle; 66. First bending cylinder; 67. First rotating block; 68. First rotating seat; 69. First fixed pressure block; 610. First pressing cylinder; 611. First movable pressure block; 612. First lower pressure-maintaining cylinder; 613. First lower pressure-maintaining block; 614. First upper pressure-maintaining cylinder; 615. First upper pressure-maintaining block;

[0055] 7. Second bending mechanism; 71. Second oblique drive cylinder; 72. Second support; 73. Second pressure needle cylinder; 74. Second pressure needle shaft; 75. Second pressure needle; 76. Second bending cylinder; 77. Second rotating block; 78. Second rotating seat; 79. First vertical support plate; 710. Second fixed pressure block; 711. Second pressing cylinder; 712. Second movable pressure block; 713. Second lower pressure-maintaining cylinder; 714. Second lower pressure-maintaining block; 715. Second upper pressure-maintaining cylinder; 716. Second upper pressure-maintaining block; A. First air-avoiding clamping groove;

[0056] 8. Third bending mechanism; 81. Third support; 82. Third pressure needle cylinder; 83. Third pressure needle shaft; 84. Third pressure needle; 85. Third bending cylinder; 86. Third rotating block; 87. Third rotating seat; 88. Second vertical support plate; 89. Third fixed pressure block; 810. Third clamping cylinder; 811. Third movable pressure block; 812. Third lower pressure-maintaining cylinder; 813. Third lower pressure-maintaining block; 814. Third upper pressure-maintaining cylinder; 815. Third upper pressure-maintaining block; B. Second air-avoiding clamping groove; C. Through groove; 816. Transmission block. DETAILED DESCRIPTION

[0057] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0058] It should be noted that all directional indications such as up, down, left, right, front, back, etc. in the embodiments of the present invention are only used to explain the relative position relationship and movement status of various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0059] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixed" should be understood in a broad sense. For example, "connection" can mean fixed connection, detachable connection, or integration; it can mean mechanical connection or electrical connection; it can mean direct connection or indirect connection through an intermediate medium; it can mean internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Example 1

[0060] like Figures 1 to 6 and Figures 10 to 12As shown, the present invention proposes a multiple bending machine for a flexible FPC support strip, comprising a chassis 1 with an installation space inside, an FPC support 2, a carrying mechanism 3 and a bending part, wherein the FPC support 2 is erected on the chassis 1 in a straight line direction, and the flexible FPC0 is placed on the FPC support 2; the flexible FPC0 comprises an FPC belt body 01 and a support strip 02, the support strip 02 is connected to one side of the FPC belt body 01 in parallel and at intervals, and the support strip 02 is provided with a first bending line a, a second bending line b and a third bending line c with an angle of 45° to its side direction; the carrying mechanism 3 is vertically connected to the outside of the FPC support 2, for carrying the support strip 02 after bending; the bending part is arranged in the installation space of the chassis 1 and extends above the chassis 1; the bending part comprises a first bending mechanism 6, a second bending machine 7, which move linearly and rotationally in the horizontal plane, Structure 7 and the third bending mechanism 8; after the first bending mechanism 6 clamps the support belt 02 at the outer end of the first bending line a, it inserts the first pressure needle 65 to the first bending line a, and drives the support belt 02 at the outer end of the first bending line a to flip 180° along the first bending line a with the first pressure needle 65 as the rotation axis to complete the first bending. The support belt 02 after the first bending is supported by the supporting mechanism 3; the second bending mechanism 7 clamps the support belt 02 after the first bending, and inserts the second pressure needle 75 to the second bending line b, and drives the support belt 02 to flip 180° along the second bending line b with the second pressure needle 75 as the rotation axis to complete the second bending; the third bending mechanism 8 clamps the support belt 02 after the second bending, and inserts the third pressure needle 84 to the third bending line c, and drives the support belt 02 to flip 180° along the third bending line c with the third pressure needle 84 as the rotation axis to complete the third bending.

[0061] like Figures 1 to 4 As shown, as an embodiment of the present invention, the FPC support 2 of the present invention is a strip-shaped carrying platform for horizontally carrying the FPC belt body 01; a carrying block with a strip-shaped groove is provided on one side of the FPC support 2 for horizontally carrying the support belt 02, and the support belt 02 at the outer end of the first bending line a is suspended on the side of the carrying block so as to be clamped by the first bending mechanism 6.

[0062] like Figures 7 to 9As shown, as an embodiment of the present invention, the bearing mechanism 3 of the present invention includes a bearing component and an adsorption component, wherein the bearing component is arranged on the chassis 1, and outputs linear power in a direction perpendicular to the FPC support 2 to adjust the bearing position, and the bearing component horizontally carries the bent support belt 02; the adsorption component is arranged on the bearing component, and outputs power in a vertical direction, for adsorbing and fixing the end 03 of the support belt 02 from above; the bearing component includes a bearing support 31, a bearing transverse movement cylinder 32, a bearing support plate 33 and a bearing block 34, wherein the bearing support 31 is horizontally arranged on the chassis 1; the bearing transverse movement cylinder 32 is arranged in a direction perpendicular to the FPC support 2, and along the Direction output linear power; the bearing support plate 33 is vertically arranged and slidably connected to the bearing transverse movement cylinder 32, and is connected to the output end of the bearing transverse movement cylinder 32; the bearing block 34 is horizontally arranged at the top of the bearing support plate 33, and one side of the bearing block 34 is spaced apart with at least two material taking grooves D to form a tooth-like structure, so that the first bending mechanism 6 can avoid the air and clamp the support belt 02; the adsorption component includes an adsorption cylinder 35 and a suction nozzle 36, wherein the adsorption cylinder 35 is vertically arranged on the side wall of the bearing support plate 33, and the output end is arranged upward; the suction nozzle 36 is connected to the output end of the adsorption cylinder 35, and is arranged downward, so as to adsorb and fix the end head 03 after approaching the end head 03 from above.

[0063] Furthermore, the bearing mechanism 3 of the present invention may also include a bearing longitudinal movement cylinder, and the bearing transverse movement cylinder 32 may be set on the output end of the bearing longitudinal movement cylinder. The bearing transverse movement cylinder 32 is driven by the bearing longitudinal movement cylinder to output power in the longitudinal direction, so that the bearing block 34 has the function of adjusting the position in the longitudinal and transverse directions at the same time, that is, the bearing mechanism 3 can adjust the position after carrying the branch belt 02 after the first bending to carry the branch belt 02 after the second bending.

[0064] like Figures 1 to 4 As shown, as an embodiment of the present invention, the bending part of the present invention also includes a horizontal moving mechanism 4 and a rotating mechanism 5, wherein the horizontal moving mechanism 4 is arranged in the chassis 1, and outputs linear power in the longitudinal and transverse directions in the horizontal plane; the rotating mechanism 5 is arranged on the output end of the horizontal moving mechanism 4, and extends upward to the surface of the chassis 1 to form a horizontal support plane, and the rotating mechanism 5 outputs rotational power in the horizontal plane to drive the horizontal support plane to rotate; the first bending mechanism 6, the second bending mechanism 7 and the third bending mechanism 8 are arranged on the horizontal support plane.

[0065] like Figures 13 to 15As shown, as an embodiment of the present invention, the first bending mechanism 6 of the present invention includes a first oblique push assembly, a first bending assembly, a first pressure needle assembly and a first pressure-maintaining assembly, wherein the first oblique push assembly outputs power in a direction perpendicular to the FPC support 2; the first bending assembly is arranged on the first oblique push assembly in a direction at a 45° angle to the first oblique push assembly when bending, and outputs rotational power in a vertical plane, the first clamping component of the first bending assembly is arranged perpendicular to the first oblique push assembly, and is used to clamp the support belt 02 and then drive the support belt 02 to flip 180°; the first pressure The needle assembly is inserted into the first bending assembly and outputs linear power along a 45° angle with the first oblique push assembly, so as to drive its first pressure needle 65 to extend into the first bending line a, so that the first pressure needle 65 presses the support belt 02 along the first bending line a, so as to serve as the rotation axis when the support belt 02 rotates and bends; the first pressure maintaining assembly is arranged in the rotating part and the non-rotating part of the first bending assembly, and the first pressure maintaining assembly after bending is respectively located on the upper and lower sides of the bending point of the branch belt 02, and outputs power in the vertical direction, so as to press the bending point of the support belt 02 from the upper and lower sides for maintaining pressure.

[0066] The first oblique thrust assembly includes a first oblique drive cylinder 61 and a first support 62, wherein the first oblique drive cylinder 61 is horizontally arranged in a direction perpendicular to the FPC support 2 when bending, and outputs linear power in this direction; the first support 62 is slidably arranged on the first oblique drive cylinder 61 and connected to the output end of the first oblique drive cylinder 61, and a first support plate is vertically arranged on the first support 62, and the first support plate is arranged in a direction with an angle of 45° with the first oblique drive cylinder 61; the first bending assembly includes a first bending cylinder 6 6. A first rotating block 67, a first rotating seat 68 and a first clamping component, wherein the first bending cylinder 66 is arranged on a side wall of the first support plate and outputs rotational power in a vertical plane; the first rotating block 67 is connected to the output end of the first bending cylinder 66; the first rotating seat 68 is connected to the side wall of the first rotating block 67 and extends in a direction perpendicular to the first oblique drive cylinder 61; the first clamping component is arranged on the first rotating seat 68 and outputs power in a vertical direction for clamping the support belt 02.

[0067] The first pressing needle assembly includes a first pressing needle cylinder 63, a first pressing needle shaft 64 and a first pressing needle 65, wherein the first pressing needle cylinder 63 is arranged on the other side wall of the first support plate and outputs power in a direction perpendicular to the first support plate; the first pressing needle shaft 64 is connected to the output end of the first pressing needle cylinder 63, and extends horizontally through the first support plate, the first bending cylinder 66 and the first rotating block 67, and is driven by the first pressing needle cylinder 63 to move freely in a straight line direction; the first pressing needle 65 is connected to the end of the first pressing needle shaft 64, and the first pressing needle 65 is coaxially arranged with the rotation center axis of the first rotating block 67.

[0068] The first pressure-maintaining assembly includes a first lower pressure-maintaining cylinder 612, a first lower pressure-maintaining block 613, a first upper pressure-maintaining cylinder 614 and a first upper pressure-maintaining block 615, wherein the first lower pressure-maintaining cylinder 612 is arranged on the first rotating seat 68 and outputs power in the vertical direction; the first lower pressure-maintaining block 613 is connected to the output end of the first lower pressure-maintaining cylinder 612; the first upper pressure-maintaining cylinder 614 is connected to the first bending cylinder 66 through a connecting plate, and the output end is arranged downward; the first upper pressure-maintaining cylinder 614 is connected to the first bending cylinder 66 through a connecting plate, and the output end is arranged downward; Block 615 is connected to the output end of the first upper pressure-maintaining cylinder 614; after the first lower pressure-maintaining cylinder 612 and the first lower pressure-maintaining block 613 complete the first bending with the first rotating seat 68, they rotate to the bottom of the support belt 02; the first lower pressure-maintaining cylinder 612 and the first upper pressure-maintaining cylinder 614 respectively output power to drive the first lower pressure-maintaining block 613 and the first upper pressure-maintaining block 615 to press the first bending line a of the support belt 02 from the bottom and top, which is used to press and maintain the bending parts that overlap up and down after bending.

[0069] In addition, the outer end of the first rotating seat 68 of the present invention is provided with a vertical support plate extending vertically upward; the first clamping component of the present invention includes a first fixed pressure block 69, a first pressing cylinder 610 and a first movable pressure block 611, the first fixed pressure block 69 is arranged on the top of the vertical support plate and extends horizontally, and an elastic block (such as a silicone block) is provided at the bottom of the horizontal extension; the first pressing cylinder 610 is arranged close to the vertical support plate, and the output end is arranged upward; the first movable pressure block 611 is horizontally arranged on the output end of the first pressing cylinder 610, and its top is provided with There is an elastic block (such as a silicone block); before bending, the first movable pressure block 611 and the first fixed pressure block 69 are arranged at intervals up and down. After the support belt enters the gap space between the first movable pressure block 611 and the first fixed pressure block 69 by moving the first clamping component, the first clamping cylinder 610 drives the first movable pressure block 611 to move toward the first fixed pressure block 69 to clamp and fix the support belt 02; after the support belt 02 is clamped, the first clamping component rotates as a whole with the first rotating seat 68 to make the support belt 02 complete a 180° flip turn.

[0070] Furthermore, the present invention designs a flexible FPC strip multiple bending machine and its bending process using a movable pressure pin as an angle control structure during the bending process, thereby achieving multiple automatic bending at different positions and angles on the same strip of the flexible FPC, and realizing local compression at the bending line during the bending process, thereby avoiding local warping during the bending process, improving the bending position accuracy, and accurately controlling the bending thickness and bending curvature through the outer diameter of the pressure pin, thereby improving the surface flatness of the strip after bending. The present invention is applied to the field of automatic bending of flexible FPC support tapes at different positions and angles, aiming to provide a method of achieving automatic bending while having good versatility, and being able to further improve the bending curvature, position accuracy and surface flatness of the tape after bending by effectively solving the problems of bending warping and bending curvature under the premise of meeting the requirements of different flexible FPC support tape bending processes; the present invention as a whole uses a chassis with an installation space inside as a bearing structure, a bending part is provided in the installation space, an FPC support is provided on the upper part of the chassis in front of the bending part, and a bearing mechanism perpendicular to it is provided on the front side of the FPC support. During the overall bending process, the flexible FPC to be bent is placed horizontally on the FPC support, and the tape body of the flexible FPC is carried by the FPC support and downwardly sucked by the vacuum nozzle arranged thereon. The flexible FPC strip to be bent is adsorbed and fixed, and is located on its front side. Before bending, it is arranged parallel to and spaced apart from the FPC strip body, and is horizontally supported by the bearing block of the FPC support. The part to be bent is in a suspended state; the bending part includes a horizontal moving mechanism and a rotating mechanism arranged inside the chassis, and a first bending mechanism, a second bending mechanism and a third bending mechanism arranged on the rotating mechanism. The horizontal moving mechanism provides linear power in the longitudinal and transverse directions in the horizontal plane, which is used to adjust the real-time position during the bending process; the rotating mechanism is used to provide rotational power in the horizontal plane, which is used to adjust the real-time angle during the bending process; the first bending mechanism, the second bending mechanism and the third bending mechanism are actuators for performing three bends on the strip; the bearing mechanism arranged on the front side of the FPC is used to carry and support the bent strip.The special feature of the present invention is that it automatically bends the support belt along the first, second and third bending lines with an angle of 45 degrees to the side of the belt body, and automatically supports the bent support belt through the corresponding supporting mechanism that can adjust its position in real time. At the same time, based on the bending principle that the support belt needs to be clamped and fixed before bending and then driven to rotate, in order to avoid movement interference with the supporting mechanism during the clamping process of the support belt (under normal circumstances, when the support belt is supported by the horizontal supporting surface of the supporting mechanism, the bottom of the support belt is supported by the supporting mechanism, so movement occurs). Dynamic interference cannot be clamped by the bending mechanism), the side of the supporting block of the supporting mechanism used to support the support belt adopts a toothed structure design, that is, a plurality of material taking slots are spaced apart on its side, and the upper and lower sides of the support belt at the material taking slots are in an open state. At the same time, the second bending mechanism and the third bending mechanism cooperate to adopt the toothed structure of the first air-avoiding clamping slot and the second air-avoiding clamping slot (the first bending mechanism does not need this structural design because it does not need to clamp the support belt on the supporting mechanism). During the clamping process, the support belt is clamped from the material taking slot by interlacing with the material taking slot, thereby effectively avoiding the problem of motion interference. Furthermore, the first bending mechanism, the second bending mechanism and the third bending mechanism of the present invention use pressure pins (including the first pressure pin, the second pressure pin and the third pressure pin) as the rotation center axis during bending. The function of the pressure pins is to achieve downward pressure and fixation of the bending line of the flexible FPC belt during the bending process, thereby reducing the situation where the belt is locally warped during bending and affects its position accuracy. At the same time, when bending, the belt uses the pressure pin as the rotation center axis, gradually covers the outer wall of the pressure pin to complete the bending, and realizes precise control of the thickness of the bending arc through the outer diameter of the pressure pin. In addition, this bending method that uses the pressure pin to assist in providing the bending rotation center can achieve bending at any angle on the belt by adjusting the angle range between the pressure pin and the belt. It can adapt to various angle bending scenarios of the flexible FPC belt and has good versatility. Specifically, in order to achieve the above functions, the pressure needle of the present invention is perpendicular to the bending rotation plane (that is, the plane on which the bending assembly drives the flexible FPC to rotate after clamping it), and can movably pass through the bending assembly. The bending action of the bending assembly does not affect the position of the pressure needle, that is, the bending rotation action and the pressure needle do not produce motion interference, and the pressure needle is coaxially arranged with the rotation center of the bending assembly, that is, the bending assembly drives the flexible FPC to complete the rotational bending action with the straight line where the pressure needle is located as the rotation center; at the same time, the pressure needle is retractable in the straight line direction so that it can extend into or away from the bending line of the flexible FPC strip before and after bending.Furthermore, due to the influence of the internal stress of the flexible FPC strip, the strip will have a rebound tendency after being bent, resulting in bending failure. In order to ensure the stability of the adhesion between the strips after bending and overlapping through foam, the bending assembly of the present invention is also provided with a pressure-holding mechanism. By respectively arranging the upper and lower parts of the pressure-holding mechanism on the rotating part and the non-rotating part of the bending assembly, the pressure-holding mechanism arranged on the non-rotating part is pre-installed and adjusted above the bending line after bending, and the pressure-holding mechanism arranged on the rotating part is located below the flexible FPC strip after following the rotation and bending of the bending assembly. By outputting linear power, the flexible FPC strip is pressed from the upper and lower sides of the bending line, thereby achieving pressure maintenance on the bent strip, effectively overcoming the internal stress of the strip, and maintaining the position accuracy of the bent strip. Example 2

[0071] like Figures 16 to 18 As shown, as an embodiment of the present invention, the second bending mechanism of the present invention includes a second oblique push assembly, a second bending assembly, a second pressure needle assembly and a second pressure-maintaining assembly, wherein the second oblique push assembly outputs power in a direction perpendicular to the FPC support 2; the second bending assembly is arranged on the second oblique push assembly in a direction at a 45° angle to the second oblique push assembly, and outputs rotational power in a vertical plane, the second clamping component of the second bending assembly is arranged perpendicular to the second oblique push assembly, and is used to clamp the support belt 02 and drive the support belt 02 to flip 180°; the second pressure needle assembly It is inserted in the second bending component and outputs linear power along the direction of the 45° angle with the second oblique push component, which is used to drive its second pressing needle 75 to extend into the second bending line b, so that the second pressing needle 75 presses the support belt 02 along the second bending line b, so as to serve as the rotation axis when the support belt 02 rotates and bends; the second pressure-keeping component is arranged in the rotating part and the non-rotating part of the second bending component, and the second pressure-keeping component after bending is respectively located on the upper and lower sides of the bending point of the branch belt 02, and outputs power in the vertical direction, so as to press the bending point of the branch belt 02 from the upper and lower sides for maintaining pressure.

[0072] The second oblique thrust assembly includes a second oblique thrust cylinder 71 and a second support 72, wherein the second oblique drive cylinder 71 is horizontally arranged in a direction perpendicular to the FPC support 2 when bending, and outputs linear power in this direction; the second support 72 is slidably arranged on the second oblique drive cylinder 71 and connected to the output end of the second oblique drive cylinder 71, and a second support plate is vertically arranged on the second support 72, and the second support plate is arranged in a direction with an angle of 45° with the second oblique drive cylinder 61; the second bending assembly includes a second bending cylinder 7 6. A second rotating block 77, a second rotating seat 78 and a second clamping component, wherein the second bending cylinder 76 is arranged on a side wall of the second support plate and outputs rotational power in a vertical plane; the second rotating block 77 is connected to the output end of the second bending cylinder 76; the second rotating seat 78 is connected to the side wall of the second rotating block 77 and extends in a direction perpendicular to the second oblique drive cylinder 71; the second clamping component is arranged on the second rotating seat 78 and outputs power in a vertical direction for clamping the support belt 02.

[0073] The second clamping component includes a first vertical support plate 79, a second fixed pressure block 710, a second pressing cylinder 711 and a second movable pressure block 712, wherein the first vertical support plate 79 is vertically arranged at the outer end of the second rotating seat 78; the second fixed pressure block 710 is horizontally arranged on the top of the first vertical support plate 79 and extends horizontally to one side of the first vertical support plate 79, the side of the second fixed pressure block 710 is a tooth-shaped structure, and at least two first air-avoiding clamping grooves A are provided at intervals along the straight direction; the second pressing cylinder 711 is provided It is located on one side wall of the first vertical support plate 79 and outputs power in the vertical direction; the second movable pressure block 712 is horizontally arranged on the output end of the second clamping cylinder 711, and the side of the second movable pressure block 712 corresponds to the second fixed pressure block 710 and is provided with at least two first air-avoiding clamping grooves A; in the process of clamping the support belt 02, the first air-avoiding groove A and the material-taking groove D of the supporting mechanism 3 are staggered and aligned in the vertical direction, effectively preventing movement interference with the supporting mechanism 3 during the process of clamping the support belt 02 during the second bending.

[0074] The second pressing needle assembly includes a second pressing needle cylinder 73, a second pressing needle shaft 74 and a second pressing needle 75, wherein the second pressing needle cylinder 73 is arranged on the other side wall of the second support plate and outputs power in a direction perpendicular to the second support plate; the second pressing needle shaft 74 is connected to the output end of the second pressing needle cylinder 73, and extends horizontally through the second support plate, the second bending cylinder 76 and the second rotating block 77, and is driven by the second pressing needle cylinder 73 to move freely in a straight line direction; the second pressing needle 75 is connected to the end of the second pressing needle shaft 74, and the second pressing needle 75 is coaxially arranged with the rotation center axis of the second rotating block 77.

[0075] The second pressure-maintaining assembly includes a second lower pressure-maintaining cylinder 713, a second lower pressure-maintaining block 714, a second upper pressure-maintaining cylinder 715 and a second upper pressure-maintaining block 716, wherein the second lower pressure-maintaining cylinder 713 is arranged on the second rotating seat 78 and outputs power in the vertical direction; the second lower pressure-maintaining block 714 is connected to the output end of the second lower pressure-maintaining cylinder 713; the second upper pressure-maintaining cylinder 715 is connected to the second bending cylinder 76 through a connecting plate, and the output end is arranged downward; the second upper pressure-maintaining cylinder 715 is connected to the second bending cylinder 76 through a connecting plate, and the output end is arranged downward; Block 716 is connected to the output end of the second upper pressure-maintaining cylinder 715; after the second lower pressure-maintaining cylinder 713 and the second lower pressure-maintaining block 714 complete the second bending with the second rotating seat 78, they rotate to the bottom of the support belt 02; the second lower pressure-maintaining cylinder 713 and the second upper pressure-maintaining cylinder 715 respectively output power to drive the second lower pressure-maintaining block 714 and the second upper pressure-maintaining block 716 to press the second bending line b of the support belt 02 from the bottom and top, which is used to press and maintain the bending parts that overlap up and down after bending. Example 3

[0076] like Figures 19 to 21 As shown, as an embodiment of the present invention, the third bending mechanism of the present invention includes a third support 81, a third bending assembly, a third pressure needle assembly and a third pressure holding assembly, wherein the third support 81 is arranged in a direction perpendicular to the FPC support 2 when bending; the third bending assembly is arranged on the third support 81 at a 45° angle to the third support 81, and outputs rotational power in a vertical plane, and the third clamping part of the third bending assembly is arranged in the same direction as the third support 81, and is used to clamp the support belt 02 and drive the support belt 02 to flip 180°; the third pressure The needle assembly is inserted into the third bending assembly and outputs linear power in a direction at an angle of 45° to the third support 81, so as to drive its third pressing needle 84 to extend into the third bending line c, so that the third pressing needle 84 presses the branch belt 02 along the third bending line c, so as to serve as the rotation axis when the branch belt 02 rotates and bends; the third pressure-keeping assembly is arranged in the rotating part and the non-rotating part of the third bending assembly, and the third pressure-keeping assembly after bending is respectively located on the upper and lower sides of the bending point of the branch belt 02, and outputs power in the vertical direction, so as to press the bending point of the branch belt 02 from the upper and lower sides for maintaining pressure.

[0077] A third support plate is vertically provided on the third support 81, and the third support plate is arranged at a 45° angle to the third support 81; the third bending assembly includes a third bending cylinder 85, a third rotating block 86, a third rotating seat 87 and a third clamping component, wherein the third bending cylinder 85 is arranged on a side wall of the third support plate and outputs rotational power in a vertical plane; the third rotating block 86 is connected to the output end of the third bending cylinder 85; the third rotating seat 87 is connected to the side wall of the third rotating block 86; the third clamping component is arranged on the third rotating seat 87 and outputs power in the vertical direction for clamping the support belt 02.

[0078] The third clamping component includes a second vertical support plate 88, a third fixed pressure block 89, a third pressing cylinder 810 and a third movable pressure block 811, wherein the second vertical support plate 88 is vertically arranged at the outer end of the third rotating seat 87; the third fixed pressure block 89 is horizontally arranged on the top of the second vertical support plate 88 and extends horizontally to one side of the second vertical support plate 88, the side of the third fixed pressure block 89 is a tooth-shaped structure, and at least two second air-avoiding clamping grooves B are spaced apart along the straight direction; the third pressing cylinder 810 is set On one side wall of the second vertical support plate 88, and output power in the vertical direction; the third movable pressure block 811 is horizontally arranged on the output end of the third clamping cylinder 810, and the side of the third movable pressure block 811 corresponds to the third fixed pressure block 89 and is provided with at least two second air-avoiding clamping grooves B; in the process of clamping the support belt 02, the second air-avoiding grooves B and the material-taking groove D of the supporting mechanism 3 are staggered and aligned in the vertical direction, effectively preventing movement interference with the supporting mechanism 3 during the process of clamping the support belt 02 during the third bending.

[0079] Furthermore, a through slot C is provided on the third fixed pressure block 89; a transmission block 816 is connected to the output end of the third clamping cylinder 810, and the transmission block 816 extends through the through slot C to above the third fixed pressure block 89; the third movable pressure block 811 is horizontally arranged above the third fixed pressure block 89 and is connected to the transmission block 816; the third clamping cylinder 810 drives the third movable pressure block 811 to approach or move away from the third fixed pressure block 89 through the transmission block 816, so as to clamp or loosen the branch belt 02.

[0080] The third pressing needle assembly includes a third pressing needle cylinder 82, a third pressing needle shaft 83 and a third pressing needle 84, wherein the third pressing needle cylinder 82 is arranged on the other side wall of the third support plate, and outputs power in a direction perpendicular to the third support plate; the third pressing needle shaft 83 is connected to the output end of the third pressing needle cylinder 82, and extends horizontally through the third support plate, the third bending cylinder 85 and the third rotating block 86, and is driven by the third pressing needle cylinder 82 to move freely in a straight line direction; the third pressing needle 84 is connected to the end of the third pressing needle shaft 83, and the third pressing needle 84 is coaxially arranged with the rotation center axis of the third rotating block 86.

[0081] The third pressure-maintaining assembly includes a third lower pressure-maintaining cylinder 812, a third lower pressure-maintaining block 813, a third upper pressure-maintaining cylinder 814 and a third upper pressure-maintaining block 815, wherein the third lower pressure-maintaining cylinder 812 is arranged on the third movable pressure block 811, and outputs linear power along the side direction of the third movable pressure block 811; the third lower pressure-maintaining block 813 is connected to the output end of the third lower pressure-maintaining cylinder 812 and is arranged downward, and the third lower pressure-maintaining cylinder 812 drives the third lower pressure-maintaining block 813 to move linearly; the third upper pressure-maintaining cylinder 814 is connected to the third bending air cylinder 812 through a connecting plate cylinder 85, and the output end is set downward; the third upper pressure-maintaining block 815 is connected to the output end of the third upper pressure-maintaining cylinder 715; the third lower pressure-maintaining cylinder 812 and the third lower pressure-maintaining block 813 rotate 180° to the bottom of the support belt 02 after completing the third bending with the third rotating seat 87; the third lower pressure-maintaining cylinder 812 and the third upper pressure-maintaining cylinder 814 respectively output power to drive the third lower pressure-maintaining block 813 and the third upper pressure-maintaining block 815 to press the third bending line c of the support belt 02 from the bottom and top, which is used to press and pressure the bending parts that overlap up and down after bending. Example 4

[0082] like Figures 5 and 6 As shown, as an embodiment of the present invention, the present invention discloses a bending process of a flexible FPC support strip multiple bending machine, which is characterized by comprising the following process steps:

[0083] S1. Flexible FPC support: The flexible FPC to be bent is placed on the FPC support, with the outer end of the support strip located at the first bending line in a suspended state;

[0084] S2. Position adjustment: The horizontal moving mechanism and the rotating mechanism of the bending part adjust the position of the first bending mechanism so that it is close to the position of the branch belt in the suspended state in step S1;

[0085] S3, first bending: the first bending assembly of the first bending mechanism clamps the branch belt in the suspended state in step S1 up and down; the first pressing needle assembly drives the first pressing needle to extend to the first bending line, and presses the branch belt along the first bending line. The first bending assembly then drives the branch belt to turn 180° around the first pressing needle, completing the first bend;

[0086] S4, first bending and pressure holding: After the support strips in step S3 complete the first bending, the position of the first bending mechanism is adjusted so that the first pressure holding assembly is aligned vertically at the first bending line. The first pressure holding assembly then presses the overlapping support strips at the first bending line upward and downward to perform pressure holding.

[0087] S5, second bending: After the first bending and pressure holding is completed in step S4, the position of the second bending mechanism is adjusted so that the second bending component is close to and clamps the branch belt after the first bending; the second pressing needle assembly drives the second pressing needle to extend to the second bending line, and presses the branch belt along the second bending line. The second bending assembly drives the branch belt to turn 180° around the second pressing needle to complete the second bending;

[0088] S6, second bending and pressure holding: After the support strips in step S5 are bent for the second time, the position of the second bending mechanism is adjusted so that the second pressure holding component is aligned with the second bending line. The second pressure holding component then presses the overlapping support strips at the second bending line to maintain pressure.

[0089] S7, third bending: After the second bending and pressure holding is completed in step S6, the third bending mechanism rotates to be close to the FPC support, and the linear position is adjusted so that its third bending component is close to and clamps the support strip after the second bending; the third pressing needle assembly extends to the third bending line, and presses the support strip along the third bending line. The third bending assembly drives the support strip to turn 180° around the third pressing needle to complete the third bending;

[0090] S8, third bending and pressure holding: After the support strip in step S7 completes the third bending, adjust the position of the third bending mechanism so that the third pressure holding component is aligned with the third bending line. The third pressure holding component presses the overlapping support strips at the third bending line up and down to perform compression and pressure holding.

[0091] The bending process of the present invention realizes inclined angle bending at three positions on the support belt 02 (first bending line a, second bending line b and third bending line c). In this embodiment, the bending inclination angle is 45°. By adjusting the installation angle of the pressing needle, multiple bending at any other angle direction can also be achieved.

[0092] The embodiments of the present invention are merely to introduce specific implementation methods and are not intended to limit the scope of protection. Persons skilled in the art may make certain modifications inspired by these embodiments. Therefore, any equivalent changes or modifications made in accordance with the scope of the present invention are within the scope of the patent claims of the present invention.

Claims

1. A flexible FPC strip multiple bending machine, comprising a chassis (1) with an internal mounting space, characterized in that: It also includes an FPC support (2), a carrying mechanism (3) and a bending part, wherein: The FPC support (2) is erected on the chassis (1) along a straight line, and the flexible FPC (0) is placed on the FPC support (2); The flexible FPC (0) comprises an FPC belt body (01) and a branch belt (02), wherein the branch belt (02) is connected to one side of the FPC belt body (01) in parallel and at intervals, and the branch belt (02) is provided with a first bending line (a), a second bending line (b), and a third bending line (c) with an angle of 45° with respect to the side direction thereof; The carrying mechanism (3) is vertically connected to the outer side of the FPC support (2) and is used to carry the support belt (02) after bending. The bending portion is arranged in the installation space of the chassis (1) and extends above the chassis (1); the bending portion includes a first bending mechanism (6), a second bending mechanism (7), and a third bending mechanism (8) that can move linearly and rotationally in a horizontal plane; After the first bending mechanism (6) clamps the support belt (02) at the outer end of the first bending line (a), the first pressing needle (65) is inserted into the first bending line (a), and the support belt (02) at the outer end of the first bending line (a) is driven to turn 180° along the first bending line (a) with the first pressing needle (65) as the rotation axis, thereby completing the first bending. After the first bending, the support belt (02) is supported by the bearing mechanism (3); The second bending mechanism (7) clamps the support belt (02) after the first bending, and inserts the second pressing needle (75) to the second bending line (b), driving the support belt (02) to turn 180° along the second bending line (b) with the second pressing needle (75) as the rotation axis to complete the second bending; The third bending mechanism (8) clamps the support belt (02) after the second bending, and inserts the third pressing needle (84) to the third bending line (c), driving the support belt (02) to turn 180 degrees along the third bending line (c) with the third pressing needle (84) as the rotation axis to complete the third bending; The FPC support (2) is a strip-shaped bearing platform for horizontally bearing the FPC belt (01); a bearing block with a strip-shaped groove is provided at intervals on one side of the FPC support (2) for horizontally bearing the support belt (02); the support belt (02) at the outer end of the first bending line (a) is suspended on the side of the bearing block so as to be clamped by the first bending mechanism (6); The bearing mechanism (3) includes a bearing component and an adsorption component, wherein the bearing component is arranged on the chassis (1) and outputs linear power in a direction perpendicular to the FPC support (2) to adjust the bearing position, and the bearing component horizontally bears the bent support belt (02); the adsorption component is arranged on the bearing component and outputs power in a vertical direction to adsorb and fix the end (03) of the support belt (02) from above; the bearing component includes a bearing support (31), a bearing transverse displacement cylinder (32), a bearing support plate (33) and a bearing block (34), wherein the bearing support (31) is horizontally arranged on the chassis (1); the bearing transverse displacement cylinder (32) is arranged in a direction perpendicular to the FPC support (2) and outputs linear power in this direction; The bearing support plate (33) is vertically arranged and slidably connected to the bearing transverse movement cylinder (32), and is connected to the output end of the bearing transverse movement cylinder (32); the bearing block (34) is horizontally arranged at the top end of the bearing support plate (33), and at least two material taking grooves (D) are spaced apart on one side of the bearing block (34), forming a tooth-like structure so that the first bending mechanism (6) can avoid the air and clamp the support belt (02); the adsorption component includes an adsorption cylinder (35) and a suction nozzle (36), wherein the adsorption cylinder (35) is vertically arranged on the side wall of the bearing support plate (33), and the output end is arranged upward; the suction nozzle (36) is connected to the output end of the adsorption cylinder (35) and is arranged downward so as to adsorb and fix the end (03) after approaching the end (03) from above; The bending portion further comprises a horizontal moving mechanism (4) and a rotating mechanism (5), wherein the horizontal moving mechanism (4) is arranged in the chassis (1) and outputs linear power in the longitudinal and transverse directions in the horizontal plane; the rotating mechanism (5) is arranged on the output end of the horizontal moving mechanism (4) and extends upward to the surface of the chassis (1) to form a horizontal support plane, and the rotating mechanism (5) outputs rotational power in the horizontal plane to drive the horizontal support plane to rotate; the first bending mechanism (6), the second bending mechanism (7) and the third bending mechanism (8) are arranged on the horizontal support plane.

2. The flexible FPC tape multiple bending machine according to claim 1, characterized in that: The first bending mechanism (6) comprises a first oblique push assembly, a first bending assembly, a first pressure needle assembly and a first pressure-maintaining assembly, wherein the first oblique push assembly outputs power in a direction perpendicular to the FPC support (2); the first bending assembly is arranged on the first oblique push assembly in a direction at an angle of 45° to the first oblique push assembly and outputs rotational power in a vertical plane; the first clamping component of the first bending assembly is arranged perpendicular to the first oblique push assembly and is used to clamp the support belt (02) and then drive the support belt (02) to flip 180°; the first pressure needle assembly is inserted in the first bending assembly and A linear power is outputted in a direction at an angle of 45° to the first oblique thrust component, and is used to drive its first pressing needle (65) to extend into the first bending line (a), so that the first pressing needle (65) presses the support belt (02) along the first bending line (a), so as to serve as a rotation axis when the support belt (02) is rotated and bent; the first pressure-maintaining component is arranged at the rotating part and the non-rotating part of the first bending component, and the first pressure-maintaining component after bending is respectively located at the upper and lower sides of the bending part of the support belt (02), and outputs power in the vertical direction, so as to press the bending part of the support belt (02) from the upper and lower sides to maintain pressure.

3. The flexible FPC tape multiple bending machine according to claim 2, characterized in that: The first oblique thrust assembly comprises a first oblique drive cylinder (61) and a first support (62), wherein the first oblique drive cylinder (61) is horizontally arranged in a direction perpendicular to the FPC support (2) and outputs linear power in the direction; the first support (62) is slidably arranged on the first oblique drive cylinder (61) and connected to the output end of the first oblique drive cylinder (61); a first support plate is vertically arranged on the first support (62), and the first support plate is arranged in a direction with an angle of 45° with the first oblique drive cylinder (61); The first bending assembly comprises a first bending cylinder (66), a first rotating block (67), a first rotating seat (68) and a first clamping component, wherein the first bending cylinder (66) is arranged on a side wall of the first support plate and outputs rotational power in a vertical plane; the first rotating block (67) is connected to the output end of the first bending cylinder (66); the first rotating seat (68) is connected to the side wall of the first rotating block (67) and extends in a direction perpendicular to the first oblique drive cylinder (61); the first clamping component is arranged on the first rotating seat (68) and outputs power in a vertical direction for clamping the support belt (02).

4. The flexible FPC tape multiple bending machine according to claim 3, characterized in that: The first pressing needle assembly includes a first pressing needle cylinder (63), a first pressing needle shaft (64) and a first pressing needle (65), wherein the first pressing needle cylinder (63) is arranged on the other side wall of the first support plate and outputs power in a direction perpendicular to the first support plate; the first pressing needle shaft (64) is connected to the output end of the first pressing needle cylinder (63), and extends horizontally through the first support plate, the first bending cylinder (66) and the first rotating block (67), and is driven by the first pressing needle cylinder (63) to move freely in a straight line direction; the first pressing needle (65) is connected to the end of the first pressing needle shaft (64), and the first pressing needle (65) is coaxially arranged with the rotation center axis of the first rotating block (67).

5. The flexible FPC tape multiple bending machine according to claim 4, characterized in that: The first pressure-maintaining assembly includes a first lower pressure-maintaining cylinder (612), a first lower pressure-maintaining block (613), a first upper pressure-maintaining cylinder (614) and a first upper pressure-maintaining block (615), wherein the first lower pressure-maintaining cylinder (612) is arranged on the first rotating seat (68) and outputs power in the vertical direction; the first lower pressure-maintaining block (613) is connected to the output end of the first lower pressure-maintaining cylinder (612); the first upper pressure-maintaining cylinder (614) is connected to the first bending cylinder (66) through a connecting plate, and the output end is arranged downward; the first upper pressure-maintaining block (615) is connected to the output end of the first upper pressure-maintaining cylinder (614); the first lower pressure-maintaining cylinder (612) and the first lower pressure-maintaining block (613) rotate to the bottom of the support belt (02) after completing the first bending with the first rotating seat (68); the first lower pressure-maintaining cylinder (612) and the first upper pressure-maintaining cylinder (614) respectively output power to drive the first lower pressure-maintaining block (613) and the first upper pressure-maintaining block (615) to press the first bending line (a) of the support belt (02) from the bottom and the top, so as to press and maintain the bending parts that overlap each other after bending.

6. The flexible FPC tape multiple bending machine according to claim 1, characterized in that: The second bending mechanism comprises a second oblique push assembly, a second bending assembly, a second pressure needle assembly and a second pressure-maintaining assembly, wherein the second oblique push assembly outputs power in a direction perpendicular to the FPC support (2); the second bending assembly is arranged on the second oblique push assembly in a direction at a 45° angle to the second oblique push assembly and outputs rotational power in a vertical plane; the second clamping component of the second bending assembly is arranged perpendicular to the second oblique push assembly and is used to clamp the support belt (02) and then drive the support belt (02) to flip 180°; the second pressure needle assembly is inserted in the second bending assembly and is arranged ... The linear power is outputted in a direction of 45° with respect to the second oblique push component, and is used to drive the second pressing needle (75) thereof to extend into the second bending line (b), so that the second pressing needle (75) presses the support belt (02) along the second bending line (b), so as to serve as a rotation axis when the support belt (02) is rotated and bent; the second pressure-maintaining component is arranged at the rotating part and the non-rotating part of the first bending component, and the second pressure-maintaining component after bending is respectively located at the upper and lower sides of the bending part of the support belt (02), and outputs power in the vertical direction, so as to press the bending part of the support belt (02) from the upper and lower sides to maintain pressure.

7. The flexible FPC tape multiple bending machine according to claim 1, characterized in that: The third bending mechanism comprises a third support (81), a third bending assembly, a third pressure needle assembly and a third pressure-maintaining assembly, wherein the third support (81) is arranged in a direction perpendicular to the FPC support (2); the third bending assembly is arranged on the third support (81) at a 45° angle to the third support (81) and outputs rotational power in a vertical plane; the third clamping component of the third bending assembly is arranged in the same direction as the third support (81) and is used to clamp the support belt (02) and drive the support belt (02) to flip 180°; the third pressure needle assembly is inserted into the third bending assembly The third pressure-maintaining assembly is provided in the rotating part and the non-rotating part of the third bending assembly. The third pressure-maintaining assembly is respectively located on the upper and lower sides of the bending part of the support belt (02) and outputs power in the vertical direction so as to press the bending part of the support belt (02) from the upper and lower sides to maintain pressure.

8. A bending process of a flexible FPC strip multiple bending machine according to any one of claims 1 to 7, characterized in that: The process steps include: S1. Flexible FPC support: The flexible FPC to be bent is placed on the FPC support, with the outer end of the support strip located at the first bending line in a suspended state; S2. Position adjustment: The horizontal moving mechanism and the rotating mechanism of the bending part adjust the position of the first bending mechanism so that it is close to the position of the branch belt in the suspended state in step S1; S3, first bending: the first bending assembly of the first bending mechanism clamps the branch belt in the suspended state in step S1 up and down; the first pressing needle assembly drives the first pressing needle to extend to the first bending line, and presses the branch belt along the first bending line. The first bending assembly then drives the branch belt to turn 180° around the first pressing needle, completing the first bend; S4, first bending and pressure holding: After the support strips in step S3 complete the first bending, the position of the first bending mechanism is adjusted so that the first pressure holding assembly is aligned vertically at the first bending line. The first pressure holding assembly then presses the overlapping support strips at the first bending line upward and downward to perform pressure holding. S5, second bending: After the first bending and pressure holding is completed in step S4, the position of the second bending mechanism is adjusted so that the second bending component is close to and clamps the branch belt after the first bending; the second pressing needle assembly drives the second pressing needle to extend to the second bending line, and presses the branch belt along the second bending line. The second bending assembly drives the branch belt to turn 180° around the second pressing needle to complete the second bending; S6, second bending and pressure holding: After the support strips in step S5 are bent for the second time, the position of the second bending mechanism is adjusted so that the second pressure holding component is aligned with the second bending line. The second pressure holding component then presses the overlapping support strips at the second bending line to maintain pressure. S7, third bending: After the second bending and pressure holding is completed in step S6, the third bending mechanism rotates to be close to the FPC support, and the linear position is adjusted so that its third bending component is close to and clamps the support strip after the second bending; the third pressing needle assembly extends to the third bending line, and presses the support strip along the third bending line. The third bending assembly drives the support strip to turn 180° around the third pressing needle to complete the third bending; S8, third bending and pressure holding: After the support strip in step S7 completes the third bending, adjust the position of the third bending mechanism so that the third pressure holding component is aligned with the third bending line. The third pressure holding component presses the overlapping support strips at the third bending line up and down to perform compression and pressure holding.

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