Multi-layer long flexible circuit board drilling machine and circuit board drilling processing method

Abstract

The invention discloses a multi-layer long flexible circuit board drilling machine and a circuit board drilling method, and relates to the technical field of circuit board manufacturing, and the multi-layer long flexible circuit board drilling machine comprises a machine base which is provided with a workbench and a drilling assembly; a plurality of unwinding rollers wound with flexible circuit boards and used for unwinding the flexible circuit boards; the two flattening assemblies are used for guiding the flexible circuit boards and driving the multiple flexible circuit boards to be sequentially overlapped on the workbench; the two pressing assemblies are used for pressing the flexible circuit board, and after the flexible circuit board is pressed, the drilling assembly performs drilling processing on the flexible circuit board; and the plurality of winding rollers are in one-to-one correspondence with the unwinding rollers and are used for winding the flexible circuit board. The problem that the efficiency is low due to the fact that traditional equipment can only conduct single-piece machining is solved, the laminating precision and flatness are guaranteed through the flattening assembly and the pressing assembly, efficient and continuous machining of multiple flexible circuit boards is achieved, the production continuity and the automation degree are improved, and the production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit board manufacturing, in particular to a multi-layer long flexible circuit board drilling machine and a circuit board drilling method applied to the multi-layer long flexible circuit board drilling machine. Background Art

[0002] Flexible Printed Circuit (FPC), also known as flexible circuit board, has many advantages such as high wiring density, light weight, thin thickness, bendability and foldability. It can adapt to the development needs of miniaturization, lightweight and multifunctionality of modern electronic equipment, and has been widely used in many fields such as consumer electronics, automotive electronics, aerospace, medical equipment, etc.

[0003] In the manufacturing process of flexible circuit boards, drilling mainly provides the necessary channels and positioning references for subsequent electrical connections and component installation. For example, inserting metalized vias after drilling can establish electrical connections between conductive lines on different layers, ensuring stable signal transmission and reliable power distribution. For another example, drilling can provide accurate positions for the installation of various electronic components such as chips, resistors, capacitors, etc., ensuring that the components can be accurately installed in the predetermined positions.

[0004] Currently, the flexible circuit board drilling machines available on the market are mainly designed for single-layer flexible circuit boards. A single circuit board is fixed on a workbench, and drilling operations are performed according to a preset program through a drilling assembly. However, the production efficiency is low as each circuit board is processed individually in sequence, and there may be errors in the drilling position on each circuit board, affecting the subsequent alignment stacking and circuit structure. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a multi-layer, long-board flexible circuit board drilling machine. The machine utilizes a flattening component and a clamping component to ensure accurate and even stacking, a deflection correction component to precisely align the sides, and an optional alignment component to align the process holes. The machine achieves precise stacking, excellent flattening, precise deflection correction, and alignment, ensuring processing quality and improving production efficiency.

[0006] The present invention also proposes a circuit board drilling method applied to the above-mentioned multi-layer long board flexible circuit board drilling machine.

[0007] The multi-layer long flexible circuit board drilling machine according to the present invention comprises: The machine base is provided with a workbench, and the workbench is provided with a drilling assembly; a plurality of unwinding rollers connected to the machine base and located at the input side of the workbench, the unwinding rollers being wound with a flexible circuit board and being used to unwind the flexible circuit board; Two leveling assemblies, connected to the machine base and located on both sides of the workbench, the leveling assemblies being used to guide the flexible circuit boards and drive the multiple flexible circuit boards to overlap in sequence on the workbench; Two pressing assemblies are connected to the workbench and are located on both sides of the workbench, the pressing assemblies are used to press the flexible circuit board, and after the flexible circuit board is pressed, the drilling assembly performs drilling processing on the flexible circuit board; A plurality of winding rollers are connected to the machine base and are located at the output side of the workbench. The winding rollers correspond to the unwinding rollers one by one and are used to wind up the flexible circuit board.

[0008] The multi-layer long board flexible circuit board drilling machine according to the present invention has at least the following beneficial effects: multiple unwinding rollers are set to unwind the flexible circuit board synchronously, and the flattening component is cooperated to guide the multi-layer circuit boards to overlap in sequence, which solves the low efficiency problem caused by the traditional equipment that can only process a single sheet, and realizes the efficient and continuous processing of multiple flexible circuit boards. In application, multiple unwinding rollers unwind the flexible circuit board, the flattening component guides the flexible circuit board and drives the multiple flexible circuit boards to overlap in sequence on the workbench, and after the pressing component presses the flexible circuit board, the drilling component can drill it, realizing the efficient processing of multi-layer flexible circuit boards and improving production efficiency; and, multiple winding rollers correspond to the unwinding rollers one by one and are used to wind up the flexible circuit boards, which is convenient for collecting and sorting the processed flexible circuit boards, thereby improving the continuity and automation of production; in addition, through the coordinated action of the flattening component and the pressing component, the flatness and stability of the flexible circuit board during the drilling process are guaranteed, thereby improving the quality and accuracy of the drilling and reducing the defective rate.

[0009] According to the multi-layer long board flexible circuit board drilling machine described in some embodiments of the present invention, the leveling component includes a plurality of pressure roller components arranged at intervals along the unwinding path of the flexible circuit board, and the pressure roller components include two radially opposite limiting pressure rollers, and the two limiting pressure rollers form a conveying channel for multiple flexible circuit boards to pass through together.

[0010] According to the multi-layer long board flexible circuit board drilling machine described in some embodiments of the present invention, on the flexible circuit board unwinding path, the width of the conveying channel formed by the multiple pressing roller components gradually decreases.

[0011] According to the multi-layer long board flexible circuit board drilling machine described in some embodiments of the present invention, the clamping assembly includes a clamping cylinder and a flexible strip, and the flexible strip is arranged on the workbench. The clamping cylinder is connected and drives the flexible strip to move downward in the vertical direction to clamp the flexible circuit board.

[0012] According to the multi-layer long board flexible circuit board drilling machine described in some embodiments of the present invention, the machine base is also connected to a plurality of correction components, the correction components are arranged in a one-to-one correspondence with the unwinding roller, the correction components are located between the unwinding roller and the leveling component, and the plurality of correction components cooperate to drive the side edges of the plurality of flexible circuit boards to be aligned.

[0013] According to the multi-layer long board flexible circuit board drilling machine described in some embodiments of the present invention, the correction component includes a correction rod, a position detection sensor and a correction motor. There are two position detection sensors and they are respectively installed at both ends of the correction rod. The flexible circuit board is wound around the correction rod. One end of the correction rod is installed on the machine base. The correction motor is connected to and drives the other end of the correction rod to swing, so as to drive the position detection sensors to detect the opposite sides of the flexible circuit board.

[0014] According to some embodiments of the present invention, the multi-layer long board flexible circuit board drilling machine also includes a transmission block, a spherical portion is provided at one end of the correction rod, and the spherical portion is rotatably installed on the machine base, and a cylindrical portion is provided at the other end of the correction rod, and the transmission block is provided with a vertical groove, and the cylindrical portion passes horizontally through and is placed in the vertical groove, and the correction motor is connected to and drives the transmission block and the cylindrical portion to move in the vertical direction.

[0015] According to the multi-layer long board flexible circuit board drilling machine described in some embodiments of the present invention, the workbench is also provided with a positioning component, which is used to detect the processing position of the flexible circuit board and to drive the multiple flexible circuit boards to the same processing position.

[0016] According to the multi-layer long board flexible circuit board drilling machine described in some embodiments of the present invention, the alignment component includes a first transmitting sensor, a second transmitting sensor and a controller. The first transmitting sensor and the second transmitting sensor are arranged opposite to each other in the vertical direction, and are respectively used to detect the positions of the process holes on the upper surface of the top flexible circuit board and the lower surface of the bottom flexible circuit board. The controller is used to control the speed difference of the multiple winding rollers to drive the process holes of the multiple flexible circuit boards to be aligned.

[0017] The circuit board drilling method according to the present invention is applied to the multi-layer long flexible circuit board drilling machine according to claim 1, and the multi-layer long flexible circuit board drilling machine further includes: The machine base is further connected to a plurality of deflection correction components, which are arranged in a one-to-one correspondence with the unwinding rollers and are located between the unwinding rollers and the leveling component; the deflection correction components include a deflection correction rod, a position detection sensor, and a deflection correction motor, wherein there are two position detection sensors and they are respectively installed at both ends of the deflection correction rod, the flexible circuit board is wound around the deflection correction rod, one end of the deflection correction rod is installed on the machine base, and the deflection correction motor is connected to and drives the other end of the deflection correction rod to swing, so as to drive the position detection sensors to detect the opposite side edges of the flexible circuit board; The workbench is further provided with an alignment component, which is used to detect the processing position of the flexible circuit board and to drive the multiple flexible circuit boards to the same processing position; the alignment component includes a first transmitting sensor, a second transmitting sensor and a controller, the first transmitting sensor and the second transmitting sensor are arranged opposite to each other in the vertical direction, and are respectively used to detect the positions of the process holes on the upper surface of the top flexible circuit board and the lower surface of the bottom flexible circuit board, and the controller is used to control the speed difference of the multiple winding rollers to drive the process holes of the multiple flexible circuit boards to align; The circuit board drilling method comprises the following steps: Coil loading: one end of the flexible circuit board is wound on the unwinding roller, and the other end is wound on the winding roller; Conveying coils: After the coils are loaded, the winding roller is operated to rotate a preset angle to convey the flexible circuit board to a preset length; Correction processing: When conveying the coil, the correction component detects the side position of each flexible circuit board and drives the side edges of multiple flexible circuit boards to align; When the flexible circuit board is an undrilled board, the circuit board drilling method further comprises the following steps: Initial drilling process: after conveying the coil, the pressing assembly presses the flexible circuit board, and the drilling assembly performs drilling process on the flexible circuit board; When the flexible circuit board is a drilled board, the circuit board drilling method further includes the following steps: Alignment processing: After the coil is conveyed, the alignment component detects the position of the process holes of the flexible circuit board and drives the process holes of multiple flexible circuit boards to align; Secondary drilling processing: After the alignment process, the pressing component presses the flexible circuit board, and the drilling component performs drilling processing on the flexible circuit board.

[0018] The circuit board drilling method according to the present invention has at least the following beneficial effects: different processing processes for undrilled boards and drilled boards, reflecting the flexibility and adaptability of the method, ensuring the precise positioning of multiple flexible circuit boards before drilling, and combined with the precise processing of the correction component, the clamping component and the drilling component, achieving high-efficiency and high-precision drilling of multiple flexible circuit boards, meeting the continuous processing requirements of different production stages, and significantly improving the overall production efficiency and product reliability. In particular, the optional alignment component is used for secondary drilling of drilled boards. The entire method process is reasonable and orderly, and the various steps cooperate with each other to ensure processing quality and improve production efficiency.

[0019] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which: Figure 1 This is a schematic structural diagram of a multi-layer long flexible circuit board drilling machine according to an embodiment of the present invention; Figure 2 This is a schematic structural diagram of a deviation-correcting assembly of a multi-layer long flexible circuit board drilling machine according to an embodiment of the present invention; Figure 3 The present invention provides a flowchart of a method for drilling holes in a multi-layer long flexible circuit board using a drilling machine.

[0021] Description of Figure Numbers: Machine base 100; workbench 110; drilling assembly 120; Unwinding roller 200; Leveling assembly 300; conveying channel 301; limiting pressure roller 310; Compression assembly 400; compression cylinder 410; flexible strip 420; Winding roller 500; Correction assembly 600; correction rod 610; spherical portion 611; cylindrical portion 612; position detection sensor 620; correction motor 630; transmission block 640; vertical slot 6401; Alignment component 700; first emission sensor 710; second emission sensor 720; Flexible circuit board 800. DETAILED DESCRIPTION

[0022] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0023] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0024] In the description of the present invention, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0025] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0026] In the description of the present invention, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0027] Flexible Printed Circuit (FPC), also known as flexible circuit board, has many advantages such as high wiring density, light weight, thin thickness, bendability and foldability. It can adapt to the development needs of miniaturization, lightweight and multifunctionality of modern electronic equipment, and has been widely used in many fields such as consumer electronics, automotive electronics, aerospace, medical equipment, etc.

[0028] In the manufacturing process of flexible circuit boards, drilling mainly provides the necessary channels and positioning references for subsequent electrical connections and component installation. For example, inserting metalized vias after drilling can establish electrical connections between conductive lines on different layers, ensuring stable signal transmission and reliable power distribution. For another example, drilling can provide accurate positions for the installation of various electronic components such as chips, resistors, capacitors, etc., ensuring that the components can be accurately installed in the predetermined positions.

[0029] Currently, the flexible circuit board drilling machines available on the market are mainly designed for single-layer flexible circuit boards. A single circuit board is fixed on a workbench, and drilling operations are performed according to a preset program through a drilling assembly. However, the production efficiency is low as each circuit board is processed individually in sequence, and there may be errors in the drilling position on each circuit board, affecting the subsequent alignment stacking and circuit structure.

[0030] For this reason, Figure 1As shown, the multi-layer long board flexible circuit board drilling machine proposed by the present invention includes a machine base 100, a workbench 110 arranged on the machine base 100, a drilling component 120 arranged on the workbench 110, a plurality of unwinding rollers 200 connected to the machine base 100 and located on the input side of the workbench 110, two leveling components 300 connected to the machine base 100 and located on both sides of the workbench 110, two pressing components 400 connected to the workbench 110 and located on both sides of the workbench 110, and a plurality of winding rollers 500 connected to the machine base 100 and located on the output side of the workbench 110. Specifically, the unwinding roller 200 is wound with the flexible circuit board 800 and is used to unwind the flexible circuit board 800, the flattening assembly 300 is used to guide the flexible circuit board 800 and drive multiple flexible circuit boards 800 to overlap in sequence on the workbench 110, the pressing assembly 400 is used to press the flexible circuit board 800, and after the flexible circuit board 800 is pressed, the drilling assembly 120 drills the flexible circuit board 800, and the winding roller 500 corresponds one-to-one to the unwinding roller 200 and is used to wind up the flexible circuit board 800. It should be noted that multiple unwinding rollers 200 are set to unwind the flexible circuit board 800 synchronously, and cooperate with the flattening component 300 to guide the multi-layer circuit boards to overlap in sequence, which solves the low efficiency problem caused by the traditional equipment that can only process a single sheet, and realizes the efficient continuous processing of multiple flexible circuit boards 800. In the application, multiple unwinding rollers 200 unwind the flexible circuit board 800, the flattening component 300 guides the flexible circuit board 800 and drives the multiple flexible circuit boards 800 to overlap in sequence on the workbench 110, and after the pressing component 400 presses the flexible circuit board 800, the drilling component 12 0 can be drilled, thereby realizing efficient processing of the multi-layer flexible circuit board 800 and improving production efficiency; and, multiple winding rollers 500 correspond one-to-one to the unwinding rollers 200 and are used to wind up the flexible circuit board 800, which is convenient for collecting and sorting the processed flexible circuit boards 800, thereby improving the continuity and automation of production; in addition, through the coordinated action of the leveling component 300 and the pressing component 400, the flatness and stability of the flexible circuit board 800 during the drilling process are guaranteed, thereby improving the quality and accuracy of the drilling and reducing the defective rate.

[0031] Refer again Figure 1In some embodiments of the present invention, the flattening assembly 300 includes multiple roller components spaced apart along the unwinding path of the flexible circuit board 800. These roller components include two diametrically opposed limiting rollers 310. These two limiting rollers 310 form a conveying channel 301 for the passage of multiple flexible circuit boards 800. By employing a segmented limiting guidance system, the flexible circuit boards 800 are gradually formed into a neatly stacked state during conveyance. The conveying channel 301 formed by the two diametrically opposed limiting rollers 310 not only provides a stable conveying path for the flexible circuit boards 800, but also effectively prevents deviation and distortion. Furthermore, along the unwinding path of the flexible circuit board 800, the width of the conveying channel 301 formed by the multiple pressure roller components gradually decreases. Specifically, the minimum distance between the two opposing limiting pressure rollers 310 along the unwinding path of the flexible circuit board 800 gradually decreases. This innovative design, in which the width of the conveying channel 301 gradually decreases as the conveying progresses, uses a progressive constraint method to naturally form a neatly stacked state during conveyance. This cleverly utilizes the deformable nature of the flexible circuit board 800 material to achieve close alignment of multiple flexible circuit boards 800 without damaging the material. This design avoids the stress concentration that can be caused by traditional rigid limiters and ensures that multiple flexible circuit boards 800 are well aligned before entering the workbench 110. This design, particularly for flexible circuit boards 800 with uneven thickness or multi-layer composite structures, can adaptively adjust the restraining force, ensuring smooth conveyance while improving stacking accuracy and drilling position accuracy. This effectively eliminates the risk of drilling deviation caused by misaligned flexible circuit boards 800, fundamentally resolving the problem of misalignment in the simultaneous processing of multiple flexible circuit boards 800 in traditional equipment.

[0032] Refer again Figure 1In some embodiments of the present invention, the pressing assembly 400 includes a pressing cylinder 410 and a flexible strip 420. The flexible strip 420 is mounted on the workbench 110. The pressing cylinder 410 is connected to and drives the flexible strip 420 to move vertically downward to compress the flexible circuit board 800. It should be noted that the pressing cylinder 410 provides a stable and reliable pressing force to ensure the stability of the flexible circuit board 800 during drilling, while the flexible material of the flexible strip 420 avoids surface damage that may be caused by traditional rigid press tools. This combination of rigid drive and flexible contact is particularly suitable for the laminated structure of multi-layer flexible circuit boards 800. While ensuring drilling positioning accuracy, it effectively protects the integrity of the circuit board surface and prevents material deformation or fracture caused by excessive pressure. This improves processing quality and extends the service life of the equipment, achieving the goal of efficient and precise processing. Optionally, the flexible strip 420 is an elastic band, with both ends of the elastic band driven by the pressing cylinder 410, enabling both ends to move downward together, driving the middle of the elastic band to press against the surface of the top layer of flexible circuit board 800. In addition, it is easy to understand that the flexible strip 420 can be replaced by a compression strip made of other materials, such as a plastic compression strip, an elastic compression strip, an aluminum compression strip, etc.

[0033] Refer again Figure 1 and Figure 2 In some embodiments of the present invention, the machine base 100 is connected to a plurality of correction components 600, and the correction components 600 are arranged in a one-to-one correspondence with the unwinding roller 200, and the correction components 600 are located between the unwinding roller 200 and the leveling component 300. The plurality of correction components 600 cooperate to drive the side alignment of the plurality of flexible circuit boards 800. By configuring an independent correction unit corresponding to the unwinding roller 200 between the unwinding roller 200 and the leveling component 300, a front-end correction system is constructed, which can detect and correct the side position deviation of each roll of flexible circuit board 800 in the first time, thereby avoiding the cumulative transmission of errors. Especially in the processing mode where multiple rolls of flexible circuit boards 800 are unwound at the same time, this design ensures that each layer of flexible circuit boards 800 reaches a good alignment state before entering the workbench 110, laying a solid foundation for subsequent overlapping drilling, significantly improving the overall accuracy and consistency of multi-layer circuit board processing, and effectively solving the processing quality problems caused by side misalignment in traditional equipment. Specifically, referring to Figure 2In some embodiments of the present invention, the deflection correction assembly 600 includes a deflection correction rod 610, a position detection sensor 620, and a deflection correction motor 630. Two position detection sensors 620 are mounted on either end of the deflection correction rod 610. The flexible printed circuit board 800 is wound around the deflection correction rod 610. One end of the deflection correction rod 610 is mounted on the machine base 100. The deflection correction motor 630 is connected to and drives the other end of the deflection correction rod 610 to swing, thereby driving the position detection sensors 620 to detect the opposite side of the flexible printed circuit board 800. It should be noted that the deflection correction rod 610 serves as a reference for the side position of the flexible printed circuit board 800. The linkage design of the position detection sensor 620 and the deflection correction motor 630 forms a closed-loop control system. It is easy to understand that the relative initial positions of multiple correcting bars 610 can be determined. By adjusting the position of the flexible circuit board 800 on each correcting bar 610, the relative positions between the multiple flexible circuit boards 800 can be determined. To this end, two position detection sensors 620 are used to monitor the relative side positions of the flexible circuit board 800 in real time. In some design applications, the distance between the two position detection sensors 620 is the distance between the relative sides of the flexible circuit board. Therefore, the position of the correcting bar 610 is swung to adjust the position so that the flexible circuit board 800 can be offset during transportation, so that the flexible circuit board 800 is confined within the two position detection sensors 620. Furthermore, a transmission block 640 is provided between the correction motor 630 and the correction rod 610, wherein a spherical portion 611 is provided at one end of the correction rod 610, and the spherical portion 611 is rotatably mounted on the machine base 100, and a cylindrical portion 612 is provided at the other end of the correction rod 610, and the transmission block 640 is provided with a vertical slot 6401, and the cylindrical portion 612 passes through and is placed in the vertical slot 6401 horizontally, and the correction motor 630 connects and drives the transmission block 640 and the cylindrical portion 612 to move in the vertical direction. Optionally, the correction motor 630 is an electric push rod. It is understandable that the joint connection design of the spherical portion 611 allows the correction rod 610 to swing freely within a certain range, and the cooperation between the cylindrical portion 612 and the vertical slot 6401 ensures the accuracy of the adjustment direction, so that the correction system can adapt to complex and changeable processing environments, ensure long-term stable processing accuracy, and effectively extend the equipment maintenance cycle. By controlling the vertical swing of one side of the correction rod 610, the position deviation generated during the transportation of the flexible circuit board 800 can be quickly corrected. Especially for the high-speed continuous production mode, this design ensures the timeliness and accuracy of the correction action, significantly improves the processing accuracy and production efficiency, and meets the strict requirements of modern production lines on equipment performance.

[0034] Refer again Figure 1In some embodiments of the present invention, the workbench 110 is provided with an alignment component 700. The alignment component 700 is used to detect the processing position of the flexible circuit board 800 and to drive multiple flexible circuit boards 800 to the same processing position, thereby realizing automated operation and reducing manual intervention. Especially for the processing of flexible circuit boards 800 with high-density wiring and small apertures, this design can meet the requirements of modern electronic equipment for precision manufacturing, significantly improve production efficiency and product consistency, and reduce the scrap rate. Especially for the processing of flexible circuit boards 800 with high-density wiring and small apertures, this design can meet the requirements of modern electronic equipment for precision manufacturing, significantly improve production efficiency and product consistency, and reduce the scrap rate. Specifically, the alignment assembly 700 includes a first transmitting sensor 710, a second transmitting sensor 720, and a controller. The first transmitting sensor 710 and the second transmitting sensor 720 are arranged in a vertically opposed manner and are respectively used to detect the positions of the process holes on the upper surface of the top flexible circuit board 800 and the lower surface of the bottom flexible circuit board 800. The controller is used to control the speed difference of the multiple winding rollers 500 to drive the process holes of the multiple flexible circuit boards 800 to align. It is easy to understand that each winding roller 500 can be driven by an independent motor, and the controller is used to control the speed of each motor. It should be noted that by arranging the first transmitting sensor 710 and the second transmitting sensor 720 in a vertically opposed manner, a three-dimensional detection system is constructed, which can accurately detect the positional relationship of the process holes on the upper and lower surfaces of the flexible circuit board 800. In conjunction with the precise control of the speed of the winding roller 500 by the controller, automatic calibration and alignment of the process hole positions of the multi-layer circuit board are achieved.

[0035] It should be noted that the correction component 600 has achieved alignment in the width direction of the flexible circuit board 800, and the alignment component 700 achieves alignment of the flexible circuit board 800 in the length direction by accurately aligning the process holes through the displacement difference of the flexible circuit board 800 in the length direction caused by the speed difference.

[0036] For example, when three flexible circuit boards 800 are stacked, the first transmitting sensor 710 can detect the overlap of the process holes to determine the positional relationship between the upper and middle flexible circuit boards 800. The second transmitting sensor 720 can detect the overlap of the process holes to determine the positional relationship between the lower and middle flexible circuit boards 800. By adjusting the speed difference between the three corresponding unwinding rollers 200, the three process holes can be completely aligned. This design not only improves alignment accuracy but also enables automated operation, reducing manual intervention. For another example, when more flexible circuit boards 800 are stacked and drilled, the process holes of two flexible circuit boards 800 are first aligned using the corresponding two unwinding rollers 200 and two winding rollers 500. The process holes of the next flexible circuit board 800 corresponding to the unwinding roller 200 and winding roller 500 are then added to align with the already aligned process holes. Consequently, any number of multiple layers of flexible circuit boards 800 can be stacked and then drilled using the drilling assembly 120.

[0037] Refer again Figure 3 , the circuit board drilling method according to the embodiment of the present invention is applied to the multi-layer long board flexible circuit board drilling machine according to the embodiment of the present invention; The circuit board drilling method includes the following steps: S100, coil loading: one end of the flexible circuit board 800 is wound on the unwinding roller 200, and the other end is wound on the winding roller 500; S200, conveying the coil: After the coil is loaded, the winding roller 500 rotates a preset angle to convey the flexible circuit board 800 to a preset length. In some applications, the preset length of each conveyance of the flexible circuit board 800 is an integer multiple of the length of the long board plus a constant margin. For example, when the drilling assembly 120 has only one drill bit, the preset length of each conveyance of the flexible circuit board 800 = the length of the long board + the constant margin. When the drilling assembly 120 has only one drill bit and can simultaneously drill two long boards, the preset length of each conveyance of the flexible circuit board 800 = 2 * the length of the long board + the constant margin. Furthermore, by conveying the coil at intervals, continuous processing of multiple long boards is achieved.

[0038] S300, deflection correction processing: When conveying the coil, the deflection correction component 600 detects the side position of each flexible circuit board 800 and drives the sides of the multiple flexible circuit boards 800 to align; When the flexible circuit board 800 is an undrilled board, the circuit board drilling method includes the following steps: S410, initial drilling: After the coil is conveyed, the pressing assembly 400 presses the flexible circuit board 800, and the drilling assembly 120 performs drilling on the flexible circuit board 800; When the flexible circuit board 800 is a drilled board, the circuit board drilling method includes the following steps: S420, alignment processing: After the coil is conveyed, the alignment component 700 detects the positions of the process holes of the flexible circuit board 800 and drives the process holes of multiple flexible circuit boards 800 to align; S430 , secondary drilling processing: After the alignment process, the pressing component 400 presses the flexible circuit board 800 , and the drilling component 120 performs drilling processing on the flexible circuit board 800 .

[0039] It should be noted that the drilled board can be a reworked board or a secondary board that has already been drilled and needs to be drilled again, or it can be an initial board with only preliminary processing holes. In addition, the single flexible circuit board 800 unwound by the single unwinding roller 200 can be a single-layer flexible circuit board 800 or a pre-fabricated multi-layer flexible circuit board 800.

[0040] According to the circuit board drilling processing method of the embodiment of the present invention, the flexibility and adaptability of the method are reflected in the different processing processes of undrilled boards and drilled boards, ensuring the precise positioning of multiple flexible circuit boards 800 before drilling, and combined with the precise processing of the correction component 600, the clamping component 400 and the drilling component 120, high-efficiency and high-precision drilling processing of multiple flexible circuit boards 800 is achieved, meeting the continuous processing requirements of different production stages, and significantly improving the overall production efficiency and product reliability. In particular, the optional alignment component 700 is used for secondary drilling processing of drilled boards. The entire method process is reasonable and orderly, and the various steps cooperate with each other to ensure processing quality and improve production efficiency.

[0041] Other structures and operations of the circuit board drilling method according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail here.

[0042] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the scope of the present invention.

Claims

1. Multi-layer long board flexible circuit board drilling machine, characterized by: include: The machine base is provided with a workbench, and the workbench is provided with a drilling assembly; a plurality of unwinding rollers connected to the machine base and located at the input side of the workbench, the unwinding rollers being wound with a flexible circuit board and being used to unwind the flexible circuit board; Two leveling assemblies, connected to the machine base and located on both sides of the workbench, the leveling assemblies being used to guide the flexible circuit boards and drive the multiple flexible circuit boards to overlap in sequence on the workbench; Two pressing assemblies are connected to the workbench and are located on both sides of the workbench, the pressing assemblies are used to press the flexible circuit board, and after the flexible circuit board is pressed, the drilling assembly performs drilling processing on the flexible circuit board; A plurality of winding rollers are connected to the machine base and are located at the output side of the workbench. The winding rollers correspond to the unwinding rollers one by one and are used to wind up the flexible circuit board.

2. The multi-layer long board flexible circuit board drilling machine according to claim 1, characterized in that: The leveling assembly includes a plurality of roller components spaced apart along the unwinding path of the flexible circuit board. The roller components include two radially opposite limiting rollers, which form a conveying channel for the plurality of flexible circuit boards to pass through.

3. The multi-layer long flexible circuit board drilling machine according to claim 2, characterized in that: On the flexible circuit board unwinding path, the width of the conveying channel formed by the plurality of pressing roller components gradually decreases.

4. The multi-layer long board flexible circuit board drilling machine according to claim 1, characterized in that: The pressing assembly includes a pressing cylinder and a flexible strip. The flexible strip is arranged on the workbench. The pressing cylinder is connected to and drives the flexible strip to move downward in a vertical direction to press the flexible circuit board.

5. The multi-layer long board flexible circuit board drilling machine according to claim 1, characterized in that: The machine base is also connected to a plurality of correction components, which are arranged in one-to-one correspondence with the unwinding rollers. The correction components are located between the unwinding rollers and the leveling components. The plurality of correction components cooperate to drive the side edges of the plurality of flexible circuit boards to be aligned.

6. The multi-layer long flexible circuit board drilling machine according to claim 5, characterized in that: The correction component includes a correction rod, a position detection sensor and a correction motor. There are two position detection sensors, which are respectively installed at both ends of the correction rod. The flexible circuit board is wound around the correction rod. One end of the correction rod is installed on the machine base. The correction motor is connected to and drives the other end of the correction rod to swing, so as to drive the position detection sensors to detect the opposite sides of the flexible circuit board.

7. The multi-layer long flexible circuit board drilling machine according to claim 6, characterized in that: It also includes a transmission block, one end of the correcting rod is provided with a spherical part, the spherical part is rotatably mounted on the machine base, the other end of the correcting rod is provided with a cylindrical part, the transmission block is provided with a vertical groove, the cylindrical part passes through horizontally and is placed in the vertical groove, and the correcting motor is connected to and drives the transmission block and the cylindrical part to move in the vertical direction.

8. The multi-layer long flexible circuit board drilling machine according to claim 1, characterized in that: The workbench is further provided with an alignment component, which is used to detect the processing position of the flexible circuit board and to drive the multiple flexible circuit boards to the same processing position.

9. The multi-layer long flexible circuit board drilling machine according to claim 8, characterized in that: The alignment component includes a first transmitting sensor, a second transmitting sensor and a controller. The first transmitting sensor and the second transmitting sensor are arranged opposite to each other in the vertical direction and are respectively used to detect the positions of the process holes on the upper surface of the top flexible circuit board and the lower surface of the bottom flexible circuit board. The controller is used to control the speed difference of the multiple winding rollers to drive the process holes of the multiple flexible circuit boards to be aligned.

10. A circuit board drilling method, characterized in that: Applicable to the multi-layer long board flexible circuit board drilling machine according to claim 1, the multi-layer long board flexible circuit board drilling machine also includes: The machine base is further connected to a plurality of deflection correction components, which are arranged in a one-to-one correspondence with the unwinding rollers and are located between the unwinding rollers and the leveling component; the deflection correction components include a deflection correction rod, a position detection sensor, and a deflection correction motor, wherein there are two position detection sensors and they are respectively installed at both ends of the deflection correction rod, the flexible circuit board is wound around the deflection correction rod, one end of the deflection correction rod is installed on the machine base, and the deflection correction motor is connected to and drives the other end of the deflection correction rod to swing, so as to drive the position detection sensors to detect the opposite side edges of the flexible circuit board; The workbench is further provided with an alignment component, which is used to detect the processing position of the flexible circuit board and to drive the multiple flexible circuit boards to the same processing position; the alignment component includes a first transmitting sensor, a second transmitting sensor and a controller, the first transmitting sensor and the second transmitting sensor are arranged opposite to each other in the vertical direction, and are respectively used to detect the positions of the process holes on the upper surface of the top flexible circuit board and the lower surface of the bottom flexible circuit board, and the controller is used to control the speed difference of the multiple winding rollers to drive the process holes of the multiple flexible circuit boards to align; The circuit board drilling method comprises the following steps: Coil loading: one end of the flexible circuit board is wound on the unwinding roller, and the other end is wound on the winding roller; Conveying coils: After the coils are loaded, the winding roller is operated to rotate a preset angle to convey the flexible circuit board to a preset length; Correction processing: When conveying the coil, the correction component detects the side position of each flexible circuit board and drives the side edges of multiple flexible circuit boards to align; When the flexible circuit board is an undrilled board, the circuit board drilling method further comprises the following steps: Initial drilling process: after conveying the coil, the pressing assembly presses the flexible circuit board, and the drilling assembly performs drilling process on the flexible circuit board; When the flexible circuit board is a drilled board, the circuit board drilling method further includes the following steps: Alignment processing: After the coil is conveyed, the alignment component detects the position of the process holes of the flexible circuit board and drives the process holes of multiple flexible circuit boards to align; Secondary drilling processing: After the alignment process, the pressing component presses the flexible circuit board, and the drilling component performs drilling processing on the flexible circuit board.

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