Laser etching equipment for flexible circuit board
By using the clamping mechanism of cylinder drive and the slider movement technology of the drive assembly in the laser etching equipment, the problem of flexible circuit boards being bending and deformation due to high temperature during laser etching is solved, and higher etching accuracy and product reliability are achieved.
Patent Information
- Application Number
- CN202510217342.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2025-05-16
AI Technical Summary
The conductive layer in the flexible circuit board is bending and deformed due to high temperature during laser etching, resulting in line size deviation and pattern distortion, reducing etching uniformity and electrical performance.
A laser etching device is designed to move downward through a cylinder drive bracket, which drives the upper clamp and the lower clamp to clamp the flexible circuit board, and moves the slider in a vertical direction through the driving assembly to tighten the flexible circuit board to resist thermal stress.
It effectively avoids bending deformation of flexible circuit boards during laser etching, ensures etching accuracy, and improves the electrical performance and reliability of the product.
Smart Images
Figure CN120002198A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of laser etching equipment, in particular to a laser etching equipment for a flexible circuit board. Background Art
[0002] Laser etcher is a device that uses high-energy laser beams to perform fine processing on the surface of materials. It controls the focal point of the laser beam to achieve precise cutting, marking or etching of materials. Compared with traditional mechanical processing methods, laser etcher does not require physical contact. This non-contact processing method enables laser etcher to process delicate, fragile or high-hardness materials. Laser etcher has a wide range of uses, including but not limited to the touch screen industry, photovoltaic industry, consumer electronics, microelectronics industry and medical equipment.
[0003] In the production of flexible circuit boards, a laser etcher is used to perform circuit engraving processing on the conductive layer in the flexible circuit board. Heat is generated during the laser etching process of the conductive layer. This heat will cause a heat-affected zone to be generated around the conductive layer. In this area, the conductive layer in the circuit board will bend and deform. The deformation of the conductive layer has a significant effect on the laser etching, which will cause circuit size deviation and pattern distortion in the etching accuracy, reduce the etching uniformity, change the electrical performance, and thus reduce the reliability and stability of the flexible circuit board. A solution is provided in the prior art. For example, patent application number CN222344493U provides an angle-adjustable laser etcher. The patent provides an angle-adjustable laser etcher, including a base body, the interior of which is fixedly connected to a base plate. The utility model is provided with a focusing hood and a discharge pipe, so that when the workpiece is being etched, the hot air and waste chips generated during the workpiece processing can be quickly collected and discharged by utilizing the setting of the focusing hood fixedly connected to the support frame. Compared with the traditional etching machine which cannot quickly discharge the hot air during processing, this design can significantly reduce the temperature of the workpiece. In the prior art, although the hot air and waste chips are quickly collected and discharged by the focusing hood and the discharge pipe, the surrounding hot air and waste chips are reduced, but during the laser etching process, the high temperature at the moment when the laser contacts the conductive layer still causes the conductive layer in the circuit board to bend and deform, resulting in circuit size deviation and pattern distortion, which will reduce the etching uniformity and change the electrical performance, thereby reducing the reliability and stability of the flexible circuit board. Summary of the invention
[0004] The purpose of the present invention is to provide a laser etching device for a flexible circuit board to solve the problem that the high temperature generated during laser etching of the conductive layer in the flexible circuit board causes the conductive layer to bend and deform, resulting in circuit size deviation and pattern distortion, which will reduce the etching uniformity and change the electrical performance, thereby reducing the reliability and stability of the flexible circuit board.
[0005] To achieve the above object, the present invention provides the following technical solutions:
[0006] A laser etching device for a flexible circuit board comprises a body, a frame, a workbench, a cylinder, a bracket, a laser generator and a multi-section conveyor belt, wherein the frame, the workbench and the multi-section conveyor belt are mounted on the body, one section of the conveyor belt is mounted in the workbench, a laser generator is mounted on the bracket, the laser generator is located above the workbench, a cylinder is mounted on the frame, the output direction of the cylinder is perpendicular to the workbench, and the cylinder is mounted with a bracket.
[0007] It is easy to understand that the flexible circuit board that needs to be engraved is placed with the conductive layer facing up on the conveyor belt, and moved to the workbench driven by the conveyor belt. When it is detected that the flexible circuit board has moved to the set position, the cylinder drives the bracket downward and drives the laser generator, starting the laser generator to engrave the circuit on the flexible circuit board. The engraved flexible circuit board continues to move forward with the conveyor belt and enters the next processing step.
[0008] Specifically, an upper clamping block is horizontally installed on the bracket, and a lower clamping block is horizontally installed on the workbench, the upper clamping block is located above the lower clamping block, and the horizontal projection of the side of the flexible circuit board is located within the horizontal projection area of the upper clamping block and the lower clamping block, the upper clamping block includes an upper fixed block, a first slider and a second slider, and the lower clamping block includes a lower fixed block, a third slider and a fourth slider, the upper fixed block and the lower fixed block, the first slider and the third slider, the second slider and the fourth slider cooperate with each other up and down to form three groups of clamping blocks, the upper end surfaces of the lower fixed block, the third slider and the fourth slider and the workbench are flush with the upper end surface of the conveyor belt, a driving assembly is provided on the bracket, the driving assembly is respectively connected to the first slider, the third slider, the second slider and the fourth slider, and the driving assembly is used to drive the first slider, the third slider, the second slider and the fourth slider to move in the first direction and the second direction respectively by the vertical movement of the bracket, and the first direction and the second direction are arranged perpendicular to each other.
[0009] During the laser etching process, the flexible circuit board will be thermally deformed due to the heat generated by the laser, resulting in a decrease in etching accuracy. At this time, the cylinder drives the bracket to move toward the workbench, thereby driving the upper clamp block to cooperate with the lower clamp block and clamp the flexible circuit board. At the same time, the first slider and the second slider in the upper clamp block and the third slider and the fourth slider in the lower clamp block are moved in coordination in the first direction and the second direction through the driving component to tighten the flexible circuit board and put it in a tensioned state. The surface of the flexible circuit board in the tensioned state remains flat, and it can resist the deformation caused by the thermal stress generated during laser etching, avoiding bending and deformation of the conductive layer in the flexible circuit board, ensuring that the length, width and other dimensions of the circuit meet the design requirements during the etching process, and ensuring the electrical performance and reliability of the product.
[0010] Preferably, the driving assembly includes a slide bar, a No. 1 spring and a No. 2 spring, the third slide bar and the fourth slide bar are horizontally slidably installed on the workbench and are respectively located in the first direction and the second direction, a plurality of slide bars are horizontally slidably installed on the lower end surface of the bracket, the plurality of slide bars are grouped into two, and a group of slide bars are slidably installed on each group of clamping block groups, and the lower ends of the slide bars pass through the clamping block groups in the first direction and the second direction, a No. 1 spring is coaxially arranged on the slide bar, the No. 1 spring on each group of the slide bars is located between the clamping block group and the lower end surface of the bracket, the slide bar is connected to the bracket through the No. 2 spring on the side away from the workbench, and the axial direction of the No. 2 spring is parallel to the first direction and the second direction respectively, and a first inclined plane and a second inclined plane are provided at the connection between the workbench and the fuselage, the first inclined plane and the second inclined plane are respectively facing the first direction and the second direction, and the first inclined plane and the second inclined plane are respectively located below the third slide bar and the fourth slide bar.
[0011] When the bracket moves downward, the sliding rod slides on the first inclined surface and the second inclined surface. Under the action of the first inclined surface and the second inclined surface, the sliding rod moves in the first direction and the second direction, thereby driving the first slider, the third slider, the second slider and the fourth slider to slide in the horizontal direction. The design of the sliding connection between the sliding rod and the first inclined surface and the second inclined surface is used to convert the downward movement of the bracket into the sliding of the first slider, the third slider, the second slider and the fourth slider in the first direction and the second direction, thereby avoiding the need for an additional power source, making the tensioning process more economical and efficient. At the same time, the simple structural design reduces the number of components and the manufacturing difficulty, thereby reducing the manufacturing cost of the equipment.
[0012] Furthermore, the design of spring No. 1 enables the first slider, the third slider, the second slider and the fourth slider to maintain a clamping state on the flexible circuit board. The clamping force provided by spring No. 1 can ensure that the flexible circuit board is always in a stable clamped state, avoiding loosening or displacement of the first slider, the third slider, the second slider and the fourth slider when the flexible circuit board is tightened. Spring No. 2 is designed to push the slide bar to reset by releasing its elastic potential energy when the bracket rises, thereby driving the first slider, the third slider, the second slider and the fourth slider to reset, preparing for the next tensioning, thereby ensuring the continuity of the production process.
[0013] Preferably, a plurality of limit pins are vertically installed on the bracket, the limit pins are arranged linearly, the arrangement direction of the limit pins is perpendicular to the first direction or the second direction corresponding to the position, the limit pins pass through the first slider, the second slider, the third slider and the fourth slider and are connected to the upper end surface of the workbench, and a sliding groove is provided at the connection between the limit pin and the first slider, the second slider, the third slider and the fourth slider, the long side direction of the sliding groove points to the workbench, and a plurality of the sliding grooves cooperate with a plurality of limit pins.
[0014] By setting the slide groove, the first slider, the second slider, the third slider and the fourth slider are prevented from interfering with the limit pin when the flexible circuit board is tensioned. At the same time, the direction is limited to limit the movement of the first slider and the third slider in the second direction, and limit the movement of the second slider and the fourth slider in the first direction, thereby preventing the first slider and the third slider and the second slider and the fourth slider from moving in the second direction and the first direction during the tensioning process of the flexible circuit board, thereby ensuring that the circuit board is evenly stressed during the tensioning process and ensuring the etching quality of the flexible circuit board.
[0015] Furthermore, due to the gaps caused by wear of the first slider, the second slider, the third slider and the fourth slider and other related parts during installation or use, there will be periodic small displacement deviations in the position during the movement due to the existence of the gaps, which will cause the flexible circuit board to shift during the tensioning process, resulting in line shift during etching, which will cause the flexible circuit board to be misaligned when connected to the pad in the later stage, causing a circuit break and making the circuit unable to conduct normally. Through the design of the limit pins, during the tensioning process of the flexible circuit board, the side wall of the flexible circuit board is in contact with the limit pins and is flush with the arrangement direction of the limit pins, thereby avoiding the deviation of the flexible circuit board during the tensioning process, resulting in the deviation of the etching line and the problem of unqualified product quality, thereby ensuring the electrical performance and reliability of the product.
[0016] Preferably, a plurality of turntables are rotatably mounted on the lower end surface of the upper clamping block and the upper end surface of the lower clamping block, and the turntables are aligned one by one, the turntable is located within the horizontal projection of the flexible circuit board, a roller is horizontally rotatably mounted on the lower end surface of the turntable, and the roller is eccentrically arranged to the axis of the turntable, the highest point of the outer diameter of the roller on the lower clamping block is flush with the upper end surface of the lower clamping block, a friction layer is arranged on the outer wall of the roller, and the friction layer is made of elastic material.
[0017] Through the design of the roller, the surface contact between the upper clamp and the lower clamp and the flexible circuit board is transformed into rolling contact between the flexible circuit board and the roller, so that rolling friction replaces sliding friction, which not only reduces the friction on the flexible circuit board, avoids surface scratches caused by sliding friction, and ensures the integrity of the conductive layer, but also the rotating installation of the turntable and the eccentric setting of the roller provide the system with additional freedom of movement in the horizontal direction. In the process of tensioning and limiting the flexible circuit board, the rotation of the turntable can be adaptively adjusted according to the deformation and displacement of the circuit board, avoiding the problem of uneven surface of the circuit board or local excessive tensioning due to uneven tensioning force.
[0018] Furthermore, the design of the friction layer avoids rigid contact between the roller and the flexible circuit board, thereby reducing the instantaneous impact force on the flexible circuit board, preventing the flexible circuit board from being damaged due to a large impact, and protecting the integrity of the circuit board. The friction layer is arranged on the roller, and the roller itself can rotate. When the friction layer undergoes elastic deformation, it can adapt to the rotation of the roller to a certain extent. The friction layer has a certain flexibility. When the roller rotates, the friction layer will deform accordingly, but it will not completely hinder the rotation of the shaft, thereby preventing the flexible circuit board from sliding due to insufficient friction, thereby maintaining the tensioned state of the flexible circuit board.
[0019] Preferably, the second slider has a vertical height greater than that of the first slider, and when the bracket is at the highest point, the distance between the lower end surface of the second slider and the lower end surface of the first slider is equal to the horizontal width of the first inclined surface.
[0020] If the flexible circuit board is tensioned in two directions at the same time, the tensioning forces in different directions may interfere with each other. Tensioning in two directions at the same time may cause certain parts of the circuit board to bear the combined forces from two directions, resulting in excessive stress concentration in these parts. The circuit board may be deformed or cracked due to stress concentration, which may affect the signal transmission quality. By limiting the height of the first slider and the second slider, the first slider cooperates with the third slider to tension the flexible circuit board in the first direction. When the slide bar reaches the lowest point of the first inclined surface, the tensioning in the first direction is stopped. At this time, the second slider cooperates with the fourth slider to tension the flexible circuit board in the second direction. By tensioning in sequence, the tensioning degree of each part of the circuit board can be better controlled, so that the tension distribution of the circuit board on the entire plane is more even, reducing the risk of stress concentration, thereby reducing the possibility of deformation, cracking or even breakage of the circuit board due to stress concentration.
[0021] Preferably, a connecting rod is provided on the bracket, the connecting rod is rotatably connected to the limit pin, the limit pin is connected to the connecting rod through a torsion spring, a limit groove is horizontally opened on the side of the limit pin close to the workbench, the bottom end face of the limit groove is vertically arranged, the height of the limit groove along the axial direction of the limit pin is equal to the thickness of the flexible circuit board, and the lower end face of the limit groove is flush with the highest point of the outer diameter of the roller shaft on the lower clamping block.
[0022] When the flexible circuit board contacts the side wall of the limit pin, since the side wall of the cylindrical limit pin is curved, and the flexible circuit board is usually flat, when the flat circuit board contacts the curved side wall of the limit pin, the circuit board bends and deforms to adapt to the shape of the limit pin. Since the deformation degree of different positions of the circuit board is different during the bending process, the part close to the limit pin is more deformed, and the part far away is less deformed. This uneven deformation will cause stress inside the circuit board. When the stress reaches a certain level, the circuit board will bend at the contact point. Through the limit groove, when the flexible circuit board is tensioned, The contact area between the side wall of the flexible circuit board and the bottom end surface of the limiting groove is increased, and the side wall of the limiting groove supports the upper and lower side walls of the flexible circuit board. At the same time, through the setting of the torsion spring, the limiting pin is automatically adjusted according to the inclination angle of the side wall of the flexible circuit board when contacting the flexible circuit board, and the side wall of the flexible circuit board is in parallel contact with the bottom end surface of the limiting groove, thereby avoiding stress concentration inside the contact point between the side wall of the flexible circuit board and the limiting pin due to different deformation degrees at different positions of the circuit board during the bending process, causing the circuit board to bend at the contact point, thereby improving the reliability and stability of the circuit.
[0023] Preferably, two pressure blocks 1 and 2 are provided on the lower end surface of the bracket, the pressure block 1 is respectively located above the first sliding block and the second sliding block, the pressure block 2 is located above the upper fixed block, the pressure block 2 has the same shape as the upper fixed block, a third inclined surface is provided on a lower end surface of the pressure block, the two third inclined surfaces are respectively inclined downward in the first direction and the second direction, the lower end surface of the pressure block 2 is horizontal, and the lower end surface of the pressure block 2 is flush with the middle height of the third inclined surface.
[0024] During the tensioning process, the end face on the first slider or the second slider contacts the third inclined surface. As the first slider or the second slider continues to move, the contact area between the friction layer and the flexible circuit board on the third inclined surface continues to increase. At this time, the pressure of the upper fixed block remains unchanged. At this time, the friction force between the first slider and the third slider or the second slider and the fourth slider on the flexible circuit board is greater than the friction force between the upper fixed block and the lower fixed block. At this time, the flexible circuit board moves in the first direction or the second direction until the side wall of the flexible circuit board is flush with the limit pin. The third inclined surface of the lower end face of the pressing block cooperates with the upper end face of the first slider or the second slider to prevent the side wall of the flexible circuit board from being not aligned with the limit pin when the flexible circuit board is tightened and reaches the preset pressure, causing the flexible circuit board to deviate during the tensioning process, resulting in the etched circuit deviation and unqualified product quality, thereby ensuring the electrical performance and reliability of the product.
[0025] Preferably, a plurality of teeth are evenly distributed in a ring shape at the lower end of the limit pin, a spring sheet is provided on the upper side wall of the slide groove, and a bevel tooth is provided on the spring sheet close to the limit pin. The length of the bevel tooth is one quarter of the outer diameter of the limit pin, and the inclination direction of the bevel tooth points to the workbench. When the upper end surface of the flexible circuit board is separated from the friction layer, the teeth are meshed with the bevel teeth.
[0026] When the flexible circuit board completes circuit etching, the cylinder drives the lower bracket to rise. At this time, under the action of the second spring and the slide bar, the third slider and the fourth slider return to their initial positions. During the process, when the upper end surface of the flexible circuit board is separated from the friction layer, the spring pushes the lower teeth to engage with the helical teeth, driving the limit pin to rotate 90°. During the rotation, the flexible circuit board is pushed out of the limit groove at the lower end surface of the limit groove. The teeth are engaged with the helical teeth, thereby avoiding pulling the flexible circuit board during the rise of the limit pin, which may cause deformation or even breakage of the wire.
[0027] Compared with the prior art, the present invention has the following beneficial effects:
[0028] 1. The present invention drives the upper clamp block and the lower clamp block to cooperate with each other through the cooperation of the driving assembly and the cylinder to drive the upper clamp block and the lower clamp block to clamp the flexible circuit board at the same time. During the process, the bracket moves downward through the design of sliding connection between the sliding rod and the first inclined surface and the second inclined surface, which is converted into the first slider and the third slider and the second slider and the fourth slider moving in the first direction and the second direction, thereby avoiding bending deformation of the flexible circuit board during laser etching and ensuring the electrical performance and reliability of the product.
[0029] 2. The present invention sets the height of the first slider and the second slider and sets the limit pin. The setting of the height of the first slider and the second slider allows the flexible circuit board to be tensioned in the first direction and the second direction successively, thereby avoiding the problem of stress concentration causing deformation and cracks when the flexible circuit board is tensioned at the same time. Through the design of the limit pin, during the tensioning process of the flexible circuit board, the side wall of the flexible circuit board is in contact with the limit pin and is flush with the arrangement direction of the limit pin, thereby avoiding the problem of deviation of the flexible circuit board during the tensioning process, resulting in deviation of the etched circuit, and causing unqualified product quality, thereby ensuring the electrical performance and reliability of the product.
[0030] 3. The present invention sets a limit pin, so that when the flexible circuit board is tensioned, the side wall of the flexible circuit board contacts the bottom end surface of the limit groove, thereby increasing the contact area. At the same time, the side wall of the limit groove supports the upper and lower side walls of the flexible circuit board. At the same time, through the setting of the torsion spring, it is automatically adjusted according to the inclination angle of the side wall of the flexible circuit board to avoid stress concentration at the contact point between the side wall of the circuit board and the limit pin, causing the circuit board to bend at the contact point. Through the meshing of the teeth and the helical teeth, it is avoided that the limit pin pulls the flexible circuit board during the rising process, thereby causing the circuit board to be deformed or even broken, thereby improving the product yield. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] Figure 1 The overall structural diagram of the laser etching equipment for flexible circuit boards;
[0032] Figure 2 It is a cross-sectional view of the laser etching equipment of the flexible circuit board in the X direction;
[0033] Figure 3 It is a partial axial cross-sectional view of the laser etching equipment for a printed circuit board;
[0034] Figure 4 For the present invention Figure 2 A partial enlarged view of the middle A;
[0035] Figure 5 For the present invention Figure 3 A partial enlarged view of point B in the middle;
[0036] Figure 6 For the present invention Figure 4 A partial enlarged view of point C in the middle;
[0037] Figure 7 For the present invention Figure 4 A partial enlarged view of point D in the middle;
[0038] Figure 8 For the present invention Figure 4 A partial enlarged view of point E in the middle;
[0039] Fig. 9 It is an axial view of the limit pin in the present invention.
[0040] In the figure: 1. body; 12. frame; 13. workbench; 131. first inclined plane; 132. second inclined plane; 14. conveyor belt; 15. bracket; 151. slide bar; 152. pressure block 1; 153. third inclined plane; 154. pressure block 2; 16. laser generator; 17. cylinder; 2. upper clamping block; 21. upper fixed block; 22. first slider; 23. second slider; 3. lower clamping block; 31. lower fixed block; 32. third slider; 33. fourth slider; 4. limit pin; 41. limit groove; 42. connecting rod; 43. torsion spring; 44. teeth; 5. turntable; 51. roller; 52. friction layer; 6. slide groove; 61. spring; 62. oblique teeth; 7. spring No. 1; 8. spring No. 2. DETAILED DESCRIPTION
[0041] See also Figures 1 to 9 The present invention provides a laser etching device for a flexible circuit board, and the technical solution is as follows:
[0042] A laser etching device for a flexible circuit board comprises a body 1, a frame 12, a workbench 13, a cylinder 17, a bracket 15, a laser generator 16 and a multi-section conveyor belt 14. The frame 12, the workbench 13 and the multi-section conveyor belt 14 are installed on the body 1, one section of the conveyor belt 14 is installed in the workbench 13, the bracket 15 is installed with a laser generator 16, the laser generator 16 is located above the workbench 13, the bracket 15 is installed on the cylinder 17, the output direction of the cylinder 17 is vertically directed to the workbench 13, the bracket 15 is installed with the cylinder 17, the conductive layer of the flexible circuit board to be engraved is placed on the conveyor belt 14 with the conductive layer facing upward, and the flexible circuit board is moved to the workbench 13 under the drive of the conveyor belt 14. When the flexible circuit board is detected, the conductive layer of the flexible circuit board is placed on the conveyor belt 14 with the conductive layer facing upward, and the flexible circuit board is moved to the workbench 13 under the drive of the conveyor belt 14. When the circuit board moves to the set position, the cylinder 17 starts to drive the laser generator 16 to descend, and at the same time starts the laser generator 16 to carve the circuit of the flexible circuit board. The finished flexible circuit board continues to move forward with the conveyor belt 14 to enter the next processing step; an upper clamping block 2 is horizontally installed on the frame, and a lower clamping block 3 is horizontally installed on the workbench 13. The upper clamping block 2 is located above the lower clamping block 3. The horizontal projection of the side of the flexible circuit board is located within the horizontal projection area of the upper clamping block 2 and the lower clamping block 3. The upper clamping block 2 includes an upper fixed block 21, a first slider 22 and a second slider 23. The lower clamping block 3 includes a lower fixed block 31, a third slider 32 and a fourth slider 33. The upper fixed block 21 and the lower fixed block 31, the first slider 22 and the third slider 33 are connected. The slider 32, the second slider 23 and the fourth slider 33 cooperate with each other up and down to form three groups of clamping blocks. The upper end faces of the lower fixed block 31, the third slider 32 and the fourth slider 33 and the workbench 13 are flush with the upper end face of the conveyor belt 14. A driving component is provided on the bracket 15. The driving component is connected to the first slider 22 and the third slider 32 and the second slider 23 and the fourth slider 33 respectively. The driving component is used to drive the first slider 22 and the third slider 32 and the second slider 23 and the fourth slider 33 to move in the first direction and the second direction respectively by the vertical movement of the bracket 15. The first direction and the second direction are arranged perpendicular to each other, wherein the first direction is the conveying direction of the conveyor belt, represented by the X direction in the figure, and is perpendicular to the horizontal plane. The first direction is the second direction, which is indicated by the Y direction in the figure. When the flexible circuit board moves to the workbench 13 and is located at the set position, the cylinder 17 drives the bracket 15 to move toward the workbench 13, thereby driving the upper clamping block 2 and the lower clamping block 3 to cooperate to clamp the flexible circuit board. At this time, the first slider 22 and the second slider 23 in the upper clamping block 2 and the third slider 32 and the fourth slider 33 in the lower clamping block 3 are moved in the first direction and the second direction through the driving component to tighten the flexible circuit board and put it in a tensioned state. The surface of the flexible circuit board in the tensioned state remains flat, and at the same time, it can resist the deformation caused by the thermal stress generated during laser etching, thereby avoiding bending and deformation of the conductive layer in the flexible circuit board;The driving assembly includes a slide bar 151, a No. 1 spring 7 and a No. 2 spring 8. The third slider 32 and the fourth slider 33 are horizontally slidably installed on the workbench 13 and are respectively located in the first direction and the second direction. A plurality of slide bars 151 are horizontally slidably installed on the lower end surface of the bracket 15. Two of the plurality of slide bars 151 form a group, and a group of slide bars 151 is slidably installed on each group of clamping blocks, and the lower ends of the slide bars 151 pass through the clamping blocks in the first direction and the second direction. A No. 1 spring 7 is coaxially arranged on the slide bar 151. The No. 1 spring 7 on each group of slide bars 151 is located between the clamping block group and the lower end surface of the bracket 15. The slide bar 151 is connected to the bracket 15 through the No. 2 spring 8 on the side away from the workbench 13, and the No. 2 spring 8 The axis direction is parallel to the first direction and the second direction respectively. The first inclined surface 131 and the second inclined surface 132 are provided at the connection between the workbench 13 and the fuselage 1. The first inclined surface 131 and the second inclined surface 132 face the first direction and the second direction respectively. The first inclined surface 131 and the second inclined surface 132 are respectively located below the third slider 32 and the fourth slider 33. When the bracket 15 moves downward, the upper fixed block 21, the slide bar 151, the first slider 22 and the second slider 23 are driven to move downward. At this time, the upper fixed block 21, the first slider 22 and the second slider 23 are in contact with the flexible circuit board and cooperate with the lower fixed block 31, the third slider 32 and the fourth slider 33 respectively. Due to the limitation of the slide bar 151, the upper fixed block 21 can only It can slide in the vertical direction and maintain a pre-tightening force on the flexible circuit board through the No. 1 spring 7 and the lower fixed block 31. At the same time, since the height of the second slider 23 in the vertical direction is greater than the height of the first slider 22 in the vertical direction, the first slider 22 contacts the flexible circuit board first than the second slider 23, and cooperates with the third slider 32 under the action of the No. 1 spring 7 to clamp the flexible circuit board. As the bracket 15 continues to move downward, the slide bar 151 contacts the first inclined surface 131. Under the action of the first inclined surface 131, the slide bar 151 moves in the first direction and drives the first slider 22 and the third slider 32 to slide in the first direction, thereby tensioning the flexible circuit board in the first direction. The bracket 15 continues to move downward. At this time, under the action of the No. 1 spring 7, the second slider 23 and the fourth slider 33 clamp the flexible circuit board. As the bracket 15 continues to move downward, the slide bar 151 contacts the second inclined surface 132. Under the action of the second inclined surface 132, the slide bar 151 moves in the second direction and drives the first slider 22 and the third slider 32 to slide in the first direction, thereby tensioning the flexible circuit board in the first direction. The downward movement of the bracket 15 is converted into the sliding of the first slider 22 and the third slider 32 and the second slider 23 and the fourth slider 33 in the first and second directions through the driving component, thereby avoiding the need for an additional power source, making the tensioning process more economical and efficient.A plurality of limit pins 4 are vertically mounted on the bracket 15, and the limit pins 4 are arranged linearly. The arrangement direction of the limit pins 4 is perpendicular to the first direction or the second direction corresponding to the position. The limit pins 4 pass through the first slider 22, the second slider 23, the third slider 32 and the fourth slider 33 and are connected to the upper end surface of the workbench 13. A slide groove 6 is provided at the connection between the limit pin 4 and the first slider 22, the second slider 23, the third slider 32 and the fourth slider 33. The long side direction of the slide groove 6 points to the workbench 13. The plurality of slide grooves 6 cooperate with the plurality of limit pins 4. Through the design of the limit pins 4, during the tensioning process of the flexible circuit board, the side wall of the flexible circuit board is in contact with the limit pins 4 and is flush with the arrangement direction of the limit pins 4. , to avoid the deviation of the flexible circuit board during the tensioning process; the lower end surface of the bracket 15 is provided with two pressing blocks 152 and 154, the pressing block 152 is respectively located above the first slider 22 and the second slider 23, the pressing block 154 is located above the upper fixed block 21, the pressing block 154 is consistent in shape with the upper fixed block 21, the lower end surface of the pressing block 152 is provided with a third inclined surface 153, the two third inclined surfaces 153 are respectively inclined downward in the first direction and the second direction, the lower end surface of the pressing block 154 is horizontal, and the lower end surface of the pressing block 154 is flush with the middle part of the third inclined surface 153. During the tensioning process, the end surface on the first slider 22 or the second slider 23 contacts the third inclined surface 153, and as The first slider 22 or the second slider 23 continues to move, and the contact area between the friction layer 52 and the flexible circuit board is continuously increased under the action of the third inclined surface 153. At this time, the pressure of the upper fixed block 21 remains unchanged. At this time, the friction force between the first slider 22 and the third slider or the second slider 23 and the fourth slider 33 on the flexible circuit board is greater than the friction force between the upper fixed block 21 and the lower fixed block 31. At this time, the flexible circuit board moves in the first direction or the second direction until the side wall of the flexible circuit board is flush with the limit pin 4, so as to avoid the problem that the side wall of the flexible circuit board is not aligned with the limit pin 4 when the flexible circuit board is tightened and reaches the preset pressure, causing the flexible circuit board to deviate during the tensioning process; the lower end surface of the upper clamping block 2 and A plurality of turntables 5 are rotatably mounted on the upper end surface of the lower clamping block 3, and the turntables 5 are aligned one by one. The turntable 5 is located in the horizontal projection of the flexible circuit board. A roller 51 is horizontally rotatably mounted on the lower end surface of the turntable 5, and the roller 51 is eccentrically arranged with the axis of the turntable 5. The highest point of the outer diameter of the roller 51 on the lower clamping block 3 is flush with the upper end surface of the lower clamping block 3. A friction layer 52 is arranged on the outer wall of the roller 51. The friction layer 52 is made of rubber material, which has good elasticity, so that the surface contact between the upper clamping block 2 and the lower clamping block 3 and the flexible circuit board is converted into rolling contact between the flexible circuit board and the roller 51, so that the rolling friction replaces the sliding friction, which not only reduces the friction force on the flexible circuit board, but also avoids surface scratches caused by sliding friction;A connecting rod 42 is provided on the bracket 15, and the connecting rod 42 is rotatably connected to the limit pin 4. The limit pin 4 is connected to the connecting rod 42 through a torsion spring 43. A limit groove 41 is horizontally provided on the side of the limit pin 4 close to the workbench 13, and the bottom end face of the limit groove 41 is vertically arranged. The height of the limit groove 41 along the axial direction of the limit pin 4 is equal to the thickness of the flexible circuit board. The lower end face of the limit groove 41 is flush with the highest point of the outer diameter of the roller shaft 51 on the lower clamping block 3. Through the setting of the torsion spring 43, the limit pin 4 is automatically adjusted according to the inclination angle of the side wall of the flexible circuit board when in contact with the flexible circuit board, and the side wall of the flexible circuit board is in parallel contact with the bottom end face of the limit groove 41, so as to avoid stress concentration inside the contact point between the side wall of the flexible circuit board and the limit pin 4 due to different deformation degrees of different positions of the circuit board during the bending process; a plurality of teeth 44 are evenly distributed in an annular shape on the lower end of the limit pin 4, and a The spring 61 is provided with a helical tooth 62 on one side of the spring 61 near the limit pin 4. The length of the helical tooth 62 is one quarter of the outer diameter of the limit pin 4. The helical tooth 62 is tilted toward the workbench 13. When the upper end surface of the flexible circuit board is separated from the friction layer 52, the tooth 44 is meshed with the helical tooth 62. When the flexible circuit board completes the circuit etching, the cylinder 17 drives the lower bracket 15 to rise. At this time, under the action of the second spring 8 and the slide bar 151, the third slider 32 and the fourth slider 33 return to the initial position. During the process, when the upper end surface of the flexible circuit board is separated from the friction layer 52, the spring 61 pushes the lower tooth 44 to mesh with the helical tooth 62, driving the limit pin 4 to rotate 90°. During the rotation, the flexible circuit board is pushed out of the limit slot 41 at the lower end surface of the limit slot 41, thereby avoiding the limit pin 4 from pulling the flexible circuit board during the rising process, thereby causing the wire to deform or even break. ;
[0043] Working principle: Place the conductive layer of the flexible circuit board that needs to be engraved with the circuit facing upward on the conveyor belt 14, and move it to the workbench 13 as driven by the conveyor belt 14. When it is detected that the flexible circuit board moves to the set position, the cylinder 17 drives the bracket 15 to move toward the workbench 13. During the downward movement of the bracket 15, the laser generator 16, the upper fixed block 21, the slide bar 151, the first slide block 22 and the second slide block 23 are driven to move downward. At this time, the upper fixed block 21, the first slide block 22 and the second slide block 23 are in contact with the flexible circuit board, and cooperate with the lower fixed block 31, the third slide block 32 and the fourth slide block 33 respectively. Due to the limitation of the slide bar 151, the upper fixed block 21 can only slide in the vertical direction, and the flexible circuit board is supported by the No. 1 spring 7 and the lower fixed block 31. The flexible circuit board maintains a preload force. At the same time, since the height of the second slider 23 in the vertical direction is greater than the height of the first slider 22 in the vertical direction, the first slider 22 contacts the flexible circuit board before the second slider 23, and cooperates with the third slider 32 to clamp the flexible circuit board under the action of the first spring 7. As the bracket 15 continues to move downward, the slide bar 151 contacts the first inclined surface 131. Under the action of the first inclined surface 131, the slide bar 151 moves in the first direction and drives the first slider 22 and the third slider 32 to slide in the first direction, thereby tensioning the flexible circuit board in the first direction. As the bracket 15 continues to move downward, under the action of the first spring 7, the second slider 23 and the fourth slider 33 clamp the flexible circuit board. The bracket 15 is clamped, and as the bracket 15 continues to move downward, the slide bar 151 contacts the second inclined surface 132. Under the action of the second inclined surface 132, the slide bar 151 moves in the second direction and drives the second slider 23 and the fourth slider 33 to slide in the second direction, thereby tensioning the flexible circuit board in the second direction. During the tensioning process, the end surface on the first slider 22 or the second slider 23 contacts the third inclined surface 153. As the first slider 22 or the second slider 23 continues to move, the contact area between the friction layer 52 and the flexible circuit board increases continuously under the action of the third inclined surface 153. At this time, the pressure of the upper fixed block 21 remains unchanged. At this time, the friction force between the first slider 22 and the third slider or the second slider 23 and the fourth slider 33 on the flexible circuit board is greater than that of the upper fixed block 2 1 and the friction force between the lower fixed block 31, as the first slider 22 and the third slider or the second slider 23 and the fourth slider 33 continue to move, the flexible circuit board moves in the first direction or the second direction until the side wall of the flexible circuit board is flush with the limit pin 4, so that when the limit pin 4 contacts the flexible circuit board, the limit pin 4 can be automatically adjusted according to the inclination angle of the side wall of the flexible circuit board through the setting of the torsion spring 43, and the side wall of the flexible circuit board is in parallel contact with the bottom end surface of the limit groove 41. After the alignment is completed, the laser generator 16 is driven to carve the circuit of the flexible circuit board. After the carving is completed, the control cylinder 17 moves upward, driving the bracket 15 upward. At the same time, under the action of the second spring 8, the release of its elastic potential energy pushes the slide bar 151 to reset.Then the first slider 22, the third slider 32, the second slider 23 and the fourth slider 33 are driven to reset. During the process, the spring 61 in the slide slot 6 pushes the lower tooth 44 to engage with the helical tooth 62, driving the limit pin 4 to rotate °. During the rotation process, the lower end surface of the limit slot 41 pushes the flexible circuit board out of the limit slot 41. When the tooth 44 and the helical tooth 62 are separated, the limit pin 4 is driven to rotate under the action of the torsion spring 43. As the bracket 15 continues to rise, it drives the upper fixed block 21, the slide bar 151, the first slider 22 and the second slider 23 to move upward. At the same time, the limit pin 4 is separated from the slide slot 6. At this time, the finished flexible circuit board continues to move forward with the conveyor belt 14 and enters the next processing step.
[0044] A specific embodiment of the present invention is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above described embodiment. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments without departing from the principles and ideas of the present invention should still fall within the scope of protection of the present invention.
Claims
1. A laser etching device for a flexible circuit board, comprising a body (1), a frame (12), a workbench (13), a cylinder (17), a bracket (15), a laser generator (16) and a multi-section conveyor belt (14), wherein the body (1) is equipped with a frame (12), a workbench (13) and a multi-section conveyor belt (14), wherein one section of the conveyor belt (14) is installed in the workbench (13), wherein the bracket (15) is equipped with a laser generator (16), wherein the laser generator (16) is located above the workbench (13), wherein the frame (12) is equipped with a cylinder (17), wherein the output direction of the cylinder (17) is vertically directed toward the workbench (13), wherein the bracket (15) is equipped with the cylinder (17), wherein the laser generator (16) is located above the workbench (13), wherein the frame (12) is equipped with a cylinder (17), wherein the output direction of the cylinder (17) is vertically directed toward the workbench (13), wherein the bracket (15) is installed on the cylinder (17), wherein the laser generator (16) is located above the workbench (13 ... laser generator (16) is located above the workbench (13), wherein the laser generator (16) is located above the workbench (13), wherein the laser generator (16) is located above the workbench (13), wherein the laser generator (16) is located above the workbench (13), wherein the laser generator (16) is located above the workbe An upper clamping block (2) is horizontally mounted on the bracket (15), and a lower clamping block (3) is horizontally mounted on the workbench (13). The upper clamping block (2) is located above the lower clamping block (3), and the horizontal projection of the side of the flexible circuit board is located within the horizontal projection area of the upper clamping block (2) and the lower clamping block (3). The upper clamping block (2) includes an upper fixed block (21), a first slider (22) and a second slider (23), and the lower clamping block (3) includes a lower fixed block (31), a third slider (32) and a fourth slider (33). The upper fixed block (21) and the lower fixed block (31), the first slider (22) and the third slider (32), the second slider (23) and the fourth slider (33) are ) cooperate with each other up and down to form three groups of clamping blocks, the upper end faces of the lower fixed block (31), the third slider (32) and the fourth slider (33) and the workbench (13) are flush with the upper end face of the conveyor belt (14), and the bracket (15) is provided with a driving component, and the driving component is respectively connected to the first slider (22) and the third slider (32) and the second slider (23) and the fourth slider (33), and the driving component is used to drive the vertical movement of the bracket (15) to drive the first slider (22) and the third slider (32) and the second slider (23) and the fourth slider (33) to move in the first direction and the second direction, and the first direction and the second direction are arranged perpendicular to each other.
2. The laser etching device for a flexible circuit board according to claim 1, characterized in that: The driving assembly comprises a slide bar (151), a first spring (7) and a second spring (8); the third slide bar (32) and the fourth slide bar (33) are horizontally slidably mounted on the workbench (13) and are respectively located in a first direction and a second direction; a plurality of slide bars (151) are horizontally slidably mounted on the lower end surface of the bracket (15); two of the plurality of slide bars (151) form a group; and a group of slide bars (151) is slidably mounted on each group of clamping blocks; and the lower ends of the slide bars (151) penetrate the clamping blocks in the first direction and the second direction; a first spring (7) is coaxially arranged on the slide bar (151); and a plurality of slide bars (151) are arranged on each group of clamping blocks. The first spring (7) is located between the clamping block group and the lower end surface of the bracket (15); the sliding rod (151) is connected to the bracket (15) through the second spring (8) on the side away from the workbench (13); and the axial direction of the second spring (8) is parallel to the first direction and the second direction respectively; a first inclined surface (131) and a second inclined surface (132) are provided at the connection between the workbench (13) and the fuselage (1); the first inclined surface (131) and the second inclined surface (132) are oriented towards the first direction and the second direction respectively; and the first inclined surface (131) and the second inclined surface (132) are respectively located below the third sliding block (32) and the fourth sliding block (33).
3. The laser etching device for a flexible circuit board according to claim 2, characterized in that: A plurality of limit pins (4) are vertically mounted on the bracket (15), the limit pins (4) are linearly arranged, the arrangement direction of the limit pins (4) is perpendicular to the first direction or the second direction corresponding to the position, the limit pins (4) pass through the first slider (22), the second slider (23), the third slider (32) and the fourth slider (33) and are connected to the upper end surface of the workbench (13), a slide groove (6) is provided at the connection between the limit pin (4) and the first slider (22), the second slider (23), the third slider (32) and the fourth slider (33), the long side direction of the slide groove (6) points to the workbench (13), and the plurality of slide grooves (6) cooperate with the plurality of limit pins (4).
4. The laser etching device for a flexible circuit board according to claim 2, characterized in that: A plurality of turntables (5) are rotatably mounted on the lower end surface of the upper clamping block (2) and the upper end surface of the lower clamping block (3), and the turntables (5) are aligned one by one. The turntable (5) is located within the horizontal projection of the flexible circuit board. A roller (51) is horizontally rotatably mounted on the lower end surface of the turntable (5), and the roller (51) is eccentrically arranged with respect to the axis of the turntable (5). The highest point of the outer diameter of the roller (51) on the lower clamping block (3) is flush with the upper end surface of the lower clamping block (3). A friction layer (52) is arranged on the outer wall of the roller (51), and the friction layer (52) is made of elastic material.
5. The laser etching device for a flexible circuit board according to claim 3, characterized in that: The height of the second slider (23) in the vertical direction is greater than the height of the first slider (22) in the vertical direction. When the bracket (15) is at the highest point, the distance between the lower end surface of the second slider (23) and the lower end surface of the first slider (22) is equal to the horizontal width of the first inclined surface (131).
6. The laser etching device for a flexible circuit board according to claim 3, characterized in that: The bracket (15) is provided with a connecting rod (42), the connecting rod (42) is rotatably connected to the limit pin (4), the limit pin (4) is connected to the connecting rod (42) through a torsion spring (43), a limit slot (41) is horizontally provided on the side of the limit pin (4) close to the workbench (13), the bottom end surface of the limit slot (41) is vertically arranged, the height of the limit slot (41) along the axial direction of the limit pin (4) is equal to the thickness of the flexible circuit board, and the lower end surface of the limit slot (41) is flush with the highest point of the outer diameter of the upper roller shaft (51) of the lower clamping block (3).
7. The laser etching device for a flexible circuit board according to claim 6, characterized in that: The lower end surface of the bracket (15) is provided with two pressing blocks 1 (152) and 154. The pressing block 1 (152) is located above the first slider (22) and the second slider (23) respectively. The pressing block 2 (154) is located above the upper fixed block (21). The pressing block 2 (154) has the same shape as the upper fixed block (21). The lower end surface of the pressing block 1 (152) is provided with a third inclined surface (153). The two third inclined surfaces (153) are inclined downward in the first direction and the second direction respectively. The lower end surface of the pressing block 2 (154) is horizontal. The lower end surface of the pressing block 2 (154) is flush with the middle of the third inclined surface (153).
8. The laser etching device for a flexible circuit board according to claim 7, characterized in that: The lower end of the limit pin (4) is evenly distributed in a ring shape with a plurality of teeth (44); a spring sheet (61) is provided on the upper side wall of the slide groove (6); a bevel tooth (62) is provided on the spring sheet (61) on the side close to the limit pin (4); the length of the bevel tooth (62) is one quarter of the outer diameter of the limit pin (4); the bevel tooth (62) is inclined in the direction of pointing toward the workbench (13); when the upper end surface of the flexible circuit board is separated from the friction layer (52), the teeth (44) are meshed with the bevel tooth (62).