Graphite heat dissipation film laser drilling device

Abstract

The application belongs to the technical field of graphite heat dissipation film processing, and discloses a graphite heat dissipation film laser drilling device. The device is improved in view of the low precision of the step feeding of the existing roll-to-roll laser drilling equipment, the lack of online dust removal and synchronous cooling structure, and the difficulty in adapting to the high-precision processing of ultra-thin graphite heat dissipation film. The device comprises a U-shaped frame, the U-shaped frame is provided with a unwinding column and a winding column, and an equidistant pushing mechanism and a blowing and cooling mechanism are installed inside; the equidistant pushing mechanism realizes equidistant step feeding of the film body through the one-way transmission structure of the gear plate and the gear rack, the blowing and cooling mechanism moves synchronously with the pushing mechanism, and the blowing and cooling of the film surface are completed synchronously. The device can realize high-precision step feeding of the graphite heat dissipation film without slipping, avoid the thermal deformation of the film body and the interference of impurities on the drilling quality, improve the drilling precision and the processing yield, and adapt to the continuous drilling processing of different specifications of the film body.

Description

Technical Field

[0001] This invention relates to the field of graphite heat dissipation film technology, specifically to a laser drilling device for graphite heat dissipation films. Background Technology

[0002] Graphite heat dissipation films are characterized by high thermal conductivity, light weight, and good flexibility, and are widely used in heat dissipation components of electronic devices. To improve heat dissipation efficiency, air permeability, and assembly compatibility, it is usually necessary to process an array of micropores on the surface of the graphite heat dissipation film. Currently, laser processing is the most common method for drilling graphite heat dissipation films.

[0003] National Patent Publication No. CN223971041U discloses a roll-to-roll laser micro-hole processing device. This device includes a frame fine-tuning assembly and cooling guide rollers. An unwinding roller is rotatably mounted on the left side inside the frame, an unfolding roller is located inside the frame, and a take-up roller is mounted in the middle of the inner side of the frame. A fine-tuning assembly is mounted on the upper inner side of the frame, and a linear guide rail is located on the outer side of the upper end of the fine-tuning assembly. A matching slider is mounted on the lower end of the linear guide rail, and a laser is fixedly mounted on the outer side of the lower end of the slider. A cooling guide roller, also located within the frame, is positioned directly below the laser. This device belongs to the field of roll and strip processing technology and addresses the problems of poor processing accuracy and the inability to adjust for material rolls of different thicknesses and materials in existing technologies. It achieves the technical effect of improving processing accuracy and facilitating adjustment for material rolls of different thicknesses and materials.

[0004] However, the aforementioned roll-to-roll laser micro-hole processing equipment still has significant drawbacks. The transmission structure still employs conventional roll material conveying methods, failing to achieve high-precision equidistant step-feeding. During continuous conveying, film slippage and uneven feeding distances easily occur, leading to insufficient laser drilling position accuracy. Furthermore, the equipment only provides localized cooling via cooling guide rollers, lacking online dust removal and synchronous cold air blowing structures for the film surface. Dust and impurities adhering to the graphite heat dissipation film surface can easily cause defects such as irregular hole diameters, edge ablation, and film surface damage during laser processing. Moreover, it cannot effectively cool the entire film during conveying, making it difficult to guarantee the processing quality and yield of the ultra-thin graphite heat dissipation film. Summary of the Invention

[0005] The purpose of this invention is to provide a laser drilling device for graphite heat dissipation films to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A laser drilling device for graphite heat dissipation film includes a U-shaped frame, on the upper part of the outer surface of the U-shaped frame, a U-shaped frame is fixedly installed, and the lower inner surface of the U-shaped frame is used to install a laser drilling device; two sets of Y-shaped frames are fixedly installed on both sides of the outer surface of the U-shaped frame in a longitudinally opposite manner by bolts, and each pair of longitudinally opposite Y-shaped frames is respectively equipped with an unwinding column and a winding column, the outer surface of the unwinding column is used to wind up the graphite heat dissipation film; An equidistant pushing mechanism is fixedly installed at one end of the inner side of the U-shaped frame. The driving end of the equidistant pushing mechanism is used to reciprocate and drive the unwinding column and the winding column to rotate by a preset angle to control the conveying distance of the graphite heat dissipation film. A blowing and cooling mechanism is installed at the other end of the inner upper surface of the U-shaped frame. The blowing and cooling end of the blowing and cooling mechanism extends above the graphite heat dissipation film conveyed between the unwinding column and the winding column, and is used to blow and cool the graphite heat dissipation film during the conveying process.

[0007] In the aforementioned graphite heat dissipation film laser drilling device: a ratchet is fixedly installed at one end of each Y-shaped frame, and an I-shaped plate is fixedly installed inside the rotating ring of the ratchet. One end of the I-shaped plate extends into the interior of the Y-shaped frame. The outer surface of the I-shaped plate is used for U-shaped plate insertion and mating. The U-shaped plate is fixedly installed on the shafts fixedly arranged on both sides of the unwinding column and the winding column, so that when the unwinding column and the winding column are installed in the Y-shaped frame, they can be driven to rotate by the I-shaped plate.

[0008] In the aforementioned graphite heat dissipation film laser drilling device, a synchronous wheel is fixedly installed at the other end of the I-shaped plate, and the synchronous wheel is located on the outside of the U-shaped frame; the outer surfaces of the two sets of synchronous wheels that are laterally opposite on both sides of the U-shaped frame are fitted with a synchronous belt, so that the unwinding column and the winding column can rotate synchronously in the same direction under the drive of the synchronous belt through the I-shaped plate.

[0009] In the aforementioned graphite heat dissipation film laser drilling device, a support plate is provided on the inner side of the synchronous belt, and the upper and lower surfaces of the support plate are slidably attached to the upper and lower surfaces of the inner annular surface of the synchronous belt, respectively.

[0010] The aforementioned graphite heat dissipation film laser drilling device comprises: an equidistant pushing mechanism including a mounting plate, which is fixedly installed inside a U-shaped frame; rotating disks are rotatably mounted on both ends of the inner side of the mounting plate, an eccentric shaft is fixedly mounted on one end of the rotating disk, and a first connecting arm is rotatably connected to the outer surface of the eccentric shaft; the other end of the first connecting arm is threadedly connected to the threaded portion of one end of a hexagonal double-ended bolt, and a second connecting arm is threadedly connected to the threaded portion of the other end of the hexagonal double-ended bolt; a sliding rod is rotatably mounted on one end of the second connecting arm, the sliding rod slidingly passing through guide strip openings on both sides of the U-shaped frame, and a guide rail block is fixedly mounted on the end of the sliding rod extending out of the guide strip opening; the guide rail block is slidably mounted on the outer surface of the guide rail, and the guide rail is fixedly mounted on both sides of the U-shaped frame.

[0011] The aforementioned graphite heat dissipation film laser drilling device comprises: a connecting block fixedly installed at one end of the guide block; a shrinkage groove is formed on the upper surface of the connecting block; a toothed plate is vertically slidably installed in the shrinkage groove; the toothed plate is used to mesh with the triangular groove formed between multiple sets of racks; the multiple sets of racks are equidistantly embedded and fixed to the outer surface of the synchronous belt; a U-shaped spring is fixedly connected to the inner lower surface of the shrinkage groove; the upper end of the U-shaped spring abuts against the lower surface of the toothed plate, and is used to apply an upward elastic thrust to the toothed plate; when the toothed plate is pushed forward with the second connecting arm, the inclined sliding surface of the toothed plate abuts against the inclined sliding surface of the rack, so that the toothed plate is pressed into the shrinkage groove; when the toothed plate is pushed to the farthest position and pulled back with the second connecting arm, under the elastic thrust of the U-shaped spring, the toothed plate extends out again and meshes with the triangular groove between the racks; at this time, the straight surface of the toothed plate abuts against the straight surface of the rack, so as to drive the synchronous belt to achieve equidistant transmission.

[0012] In the aforementioned graphite heat dissipation film laser drilling device: a motor is fixedly installed at one end of the mounting plate, and a first bevel gear is fixedly installed at the end of the output shaft of the motor. The first bevel gear meshes with two sets of second bevel gears simultaneously. The two sets of second bevel gears are fixedly installed at the ends of two sets of eccentric shafts, and the axis of the second bevel gear is coaxial with the axis of the corresponding rotating disk.

[0013] The above-mentioned graphite heat dissipation film laser drilling device includes: the blowing and cooling mechanism includes a U-shaped tube, which covers the outer surface of the graphite heat dissipation film in the conveying state; the U-shaped tube is fixedly installed in a fastening ring, which is fixedly installed at one end of the second connecting arm; the lower surface of the upper end air pipe of the U-shaped tube is connected to an air nozzle, which is V-shaped.

[0014] The aforementioned graphite heat dissipation film laser drilling device comprises: a T-shaped pipe connected to the lower surface of the U-shaped tube, and a corrugated telescopic pipe connected to the remaining port of the T-shaped pipe; a serpentine heat-conducting pipe connected to the other end of the corrugated telescopic pipe, and the other end of the serpentine heat-conducting pipe connected to the air outlet of the fan; the fan is fixedly installed inside one end of the U-shaped frame, and an air filter is connected to the air inlet of the fan.

[0015] In the aforementioned graphite heat dissipation film laser drilling device: the lower end of the outer surface of the serpentine heat pipe is in contact with the heat-conducting plate, and the heat-conducting plate is fixedly installed on the inner lower surface of the U-shaped frame; the lower surface of the heat-conducting plate is in contact with the cooling surface of the thermoelectric cooler, and a cooling fan is fixedly installed on the heating surface of the lower surface of the thermoelectric cooler.

[0016] Compared with the prior art, the beneficial effects of the present invention are: By using a unidirectional meshing transmission structure with toothed plates and racks, and a reciprocating pushing component linked by an eccentric shaft, high-precision equidistant step feeding can be achieved in the roll-to-roll conveying process of graphite heat dissipation film. There is no slippage or deviation during the feeding process. In addition, the synchronous transmission structure of ratchet and synchronous wheel solves the problem of uneven feeding spacing and poor positioning accuracy in traditional equipment, and improves the consistency of laser drilling position.

[0017] The first and second connecting arms are linked by a hexagonal double-ended bolt, which allows for flexible adjustment of the overall pushing stroke and adapts to the drilling needs of graphite heat dissipation films with different hole spacings and specifications. This breaks through the limitation of traditional equipment that can only adapt to a single specification of roll material, and improves the versatility and adaptability of the equipment.

[0018] A purging and cooling mechanism that moves synchronously with the equidistant pushing mechanism is set up. A thermoelectric cooler is used in conjunction with a serpentine heat pipe to prepare a low-temperature clean airflow. This mechanism can simultaneously complete the purging of impurities on the membrane surface and low-temperature cooling throughout the membrane transportation process. The non-contact operation will not damage the ultra-thin flexible graphite membrane. It can avoid impurities interfering with the drilling quality and prevent the membrane from deforming and ablating due to laser heat, thereby improving the processing yield.

[0019] The overall structure adopts an integrated layout, integrating the unwinding and rewinding structure, the equidistant pushing structure, and the blowing and cooling structure on the U-shaped frame. The structure is compact and occupies little space. At the same time, the actions of each mechanism are linked and matched, which can realize the continuous and automated drilling process of graphite heat dissipation film, and adapt to the needs of mass industrial production.

[0020] By supporting and limiting the timing belt with a support plate, loosening and sagging during transmission can be prevented, reducing stroke errors and further improving the stability of feeding accuracy. The interlocking structure of the I-shaped and U-shaped plates allows for quick assembly and disassembly of the unwinding and rewinding columns, enhancing the convenience of loading and unloading operations.

[0021] The ratchet's one-way limiting action prevents the unwinding and rewinding columns from rotating in opposite directions, maintaining stable membrane tension during transport and preventing membrane slack or shifting, thus ensuring smooth transport. The air filter ensures the cleanliness of the airflow sprayed onto the membrane surface, preventing secondary contamination from impurities and further improving the quality of the perforation operation. Attached Figure Description

[0022] Figure 1 This is a top view of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention from a bottom view; Figure 3 This is a schematic diagram of the structure of the unwinding column and the winding column of the present invention; Figure 4 This is a schematic diagram of the overall side cross-section of the present invention; Figure 5 This is a schematic diagram of the toothed plate and toothed rack of the present invention. Figure 6 This is a schematic diagram of the equidistant pushing mechanism of the present invention; Figure 7 This is a schematic diagram of the purging and cooling mechanism of the present invention.

[0023] In the diagram: 1. U-shaped frame; 101. U-shaped frame; 102. Guide rail; 103. Rewinding column; 104. Unwinding column; 105. U-shaped plate; 106. Y-shaped frame; 107. Guide bar opening; 108. Synchronous pulley; 109. Synchronous belt; 110. Rack; 111. I-shaped plate; 112. Ratchet; 113. Support plate; 2. Equidistant pushing mechanism; 201. Mounting plate; 202. Connecting block; 203. Shrinkage groove; 204. U-shaped spring; 205. Toothed plate; 206. Rotating disk; 207. Eccentric shaft; 208. Second bevel gear; 209. First connecting arm; 210. Hexagonal double-ended bolt; 211. Second connecting arm; 212. Slide rod; 213. Guide block; 214. Fastening ring; 215. First bevel gear; 216. Motor; 3. Purge cooling mechanism; 301. U-shaped tube; 302. T-shaped tube; 303. Corrugated telescopic tube; 304. Serpentine heat conduction tube; 305. Heat conduction plate; 306. Thermoelectric cooler; 307. Fan; 308. Air filter. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Please see Figures 1-7 This embodiment provides a laser drilling device for graphite heat dissipation film, including a U-shaped frame 1. A U-shaped frame 101 is fixedly installed on the upper part of the outer surface of the U-shaped frame 1. The lower inner surface of the U-shaped frame 101 is used to install a laser drilling device. Two sets of Y-shaped frames 106 are fixedly installed on both sides of the outer surface of the U-shaped frame 1 in a longitudinally opposite manner by bolts. Each pair of longitudinally opposite Y-shaped frames 106 is respectively rotatably equipped with an unwinding column 104 and a winding column 103. The outer surface of the unwinding column 104 is used to wind up the graphite heat dissipation film. The inner end of the U-shaped frame 1 is fixedly installed with an equidistant pushing mechanism 2. The driving end of the equidistant pushing mechanism 2 is used to reciprocate to drive the unwinding column 104 and the winding column 103 to rotate by a preset angle to control the conveying distance of the graphite heat dissipation film. The other end of the inner upper surface of the U-shaped frame 1 is installed with a blowing and cooling mechanism 3. The blowing and cooling end of the blowing and cooling mechanism 3 extends above the graphite heat dissipation film conveyed between the unwinding column 104 and the winding column 103, and is used to blow and cool the graphite heat dissipation film during the conveying process.

[0026] The U-shaped frame 1 integrates the unwinding column 104, the rewinding column 103, the equidistant pushing mechanism 2, and the blowing and cooling mechanism 3, resulting in a compact overall structure suitable for the roll-to-roll continuous processing of graphite heat dissipation films. The U-shaped frame 101 provides a stable installation reference for the laser drilling equipment, ensuring that the drilling operation corresponds to the position of the film conveying action. The equidistant pushing mechanism 2 directly drives the unwinding column 104 and the rewinding column 103 to rotate at a preset angle, which can precisely control the conveying distance of the graphite heat dissipation film and ensure the consistency of the film conveying step distance. The blowing and cooling end of the blowing and cooling mechanism 3 corresponds to the film conveyed between the unwinding column 104 and the rewinding column 103, and can simultaneously complete the blowing and cooling during the film conveying process, reducing the thermal deformation of the film and removing impurities attached to the film surface to avoid impurities interfering with the drilling operation.

[0027] Specifically, in this embodiment: a ratchet 112 is fixedly installed at one end of each Y-shaped frame 106, and an I-shaped plate 111 is fixedly installed inside the rotating ring of the ratchet 112. One end of the I-shaped plate 111 extends into the interior of the Y-shaped frame 106. The outer surface of the I-shaped plate 111 is used for the U-shaped plate 105 to be inserted and fitted. The U-shaped plate 105 is fixedly installed on the shafts fixedly provided on both sides of the unwinding column 104 and the winding column 103, so that when the unwinding column 104 and the winding column 103 are installed in the Y-shaped frame 106, they can be driven to rotate by the I-shaped plate 111. The ratchet 112 restricts the rotation direction of the I-shaped plate 111, preventing the unwinding column 104 and the take-up column 103 from rotating in opposite directions and maintaining stable tension during film conveying. The I-shaped plate 111 and the U-shaped plate 105 adopt a plug-in fit structure, which can realize quick assembly and disassembly of the unwinding column 104 and the take-up column 103, facilitating the loading and unloading of the film roll. At the same time, it can ensure the stable transmission of rotational power, so that the unwinding column 104 and the take-up column 103 rotate synchronously with the I-shaped plate 111.

[0028] Specifically, in this embodiment: a synchronous pulley 108 is fixedly installed at the other end of the I-shaped plate 111, and the synchronous pulley 108 is located on the outside of the U-shaped frame 1; the outer surfaces of the two sets of synchronous pulleys 108 that are laterally opposite on both sides of the U-shaped frame 1 are fitted with a synchronous belt 109, so that the unwinding column 104 and the winding column 103 can rotate synchronously in the same direction under the drive of the synchronous belt 109 through the I-shaped plate 111. The cooperative transmission of the synchronous pulley 108 and the synchronous belt 109 can keep the I-shaped plates 111 on both sides rotating synchronously, thereby driving the unwinding column 104 and the winding column 103 to rotate synchronously in the same direction, ensuring the consistency of the unwinding action and the winding action, avoiding the film from becoming loose or overstretched during the conveying process, and improving the stability of the film conveying.

[0029] Specifically, in this embodiment, a support plate 113 is provided on the inner side of the synchronous belt 109, and the upper and lower surfaces of the support plate 113 are slidably attached to the upper and lower surfaces of the inner annular surface of the synchronous belt 109, respectively. The support plate 113 can provide support for the inner annular surface of the synchronous belt 109, restricting the slack, sagging, or lateral movement of the synchronous belt 109 during transmission, ensuring stable meshing between the synchronous belt 109 and the synchronous pulley 108, reducing stroke errors during transmission, and improving the accuracy and stability of synchronous transmission.

[0030] Specifically, in this embodiment: the equidistant pushing mechanism 2 includes a mounting plate 201, which is fixedly installed inside the U-shaped frame 1; both ends of the inner side of the mounting plate 201 are rotatably equipped with rotating disks 206, one end of the rotating disk 206 is fixedly equipped with an eccentric shaft 207, and the outer surface of the eccentric shaft 207 is rotatably connected with a first connecting arm 209; the other end of the first connecting arm 209 is threadedly connected to the threaded part of one end of a hexagonal double-ended bolt 210, and the other end of the hexagonal double-ended bolt 210 is threadedly connected with a second connecting arm 211; one end of the second connecting arm 211 is rotatably equipped with a sliding rod 212, which slides through the guide bar openings 107 on both sides of the U-shaped frame 1, and the end of the sliding rod 212 that extends out of the guide bar openings 107 is fixedly equipped with a guide rail block 213; the guide rail block 213 is slidably installed on the outer surface of the guide rail 102, and the guide rail 102 is fixedly installed on both sides of the U-shaped frame 1. Mounting plate 201 provides a stable mounting reference for the entire push transmission structure, ensuring the installation position accuracy of each transmission component. The transmission structure composed of rotating disk 206, eccentric shaft 207, first connecting arm 209, hexagonal double-ended bolt 210, and second connecting arm 211 can convert rotational motion into reciprocating linear motion of slide rod 212, providing stable reciprocating power for the transmission of synchronous belt 109. Hexagonal double-ended bolt 210 can adjust the connection stroke between first connecting arm 209 and second connecting arm 211 to adapt to different membrane conveying step distance requirements. The cooperation between guide rail 102 and guide rail block 213, and the limiting of slide rod 212 by guide rail opening 107, can constrain the movement trajectory of slide rod 212, avoid positional deviation during movement, and ensure the straightness and stability of reciprocating linear motion.

[0031] Specifically, in this embodiment: a connecting block 202 is fixedly installed at one end of the guide block 213. A shrinkage groove 203 is formed on the upper surface of the connecting block 202, and a toothed plate 205 is vertically slidably installed in the shrinkage groove 203. The toothed plate 205 is used to mesh with the triangular groove formed between multiple sets of toothed racks 110. The multiple sets of toothed racks 110 are equidistantly embedded and fixed to the outer surface of the synchronous belt 109. A U-shaped spring piece 204 is fixedly connected to the inner lower surface of the shrinkage groove 203. The upper end of the U-shaped spring piece 204 abuts against the lower surface of the toothed plate 205, and is used to engage the toothed plate 205. 05. An upward elastic thrust is applied; when the toothed plate 205 is pushed forward with the second connecting arm 211, the inclined sliding surface of the toothed plate 205 abuts against the inclined sliding surface of the rack 110, so that the toothed plate 205 is pressed into the contraction groove 203; when the toothed plate 205 is pushed to the farthest position and pulled back with the second connecting arm 211, under the elastic thrust of the U-shaped spring 204, the toothed plate 205 extends out again and meshes in the triangular groove between the racks 110. At this time, the straight surface of the toothed plate 205 abuts against the straight surface of the rack 110, so as to drive the synchronous belt 109 to achieve equidistant transmission. The U-shaped spring 204 provides continuous elastic thrust to the toothed plate 205, ensuring the meshing stability of the toothed plate 205 and the rack 110; the shrinkage groove 203 provides limiting guidance for the vertical sliding of the toothed plate 205, preventing the toothed plate 205 from shifting position during the extension and retraction process, and ensuring the accuracy of the meshing action; the toothed plate 205 and the rack 110 adopt a structure of inclined and straight surface cooperation, which can realize the unidirectional transmission effect. When pushing forward, the toothed plate 205 is compressed and shrinks without driving the synchronous belt 109 to move. When pulling back, the toothed plate 205 and the rack 110 mesh stably, driving the synchronous belt 109 to complete the equidistant transmission, realizing the stepping operation of the synchronous belt 109, ensuring that the distance of each transmission is consistent, and thus ensuring the uniformity of the membrane conveying step distance.

[0032] Specifically, in this embodiment: a motor 216 is fixedly installed at one end of the mounting plate 201, and a first bevel gear 215 is fixedly installed at the end of the output shaft of the motor 216. The first bevel gear 215 meshes with two sets of second bevel gears 208 simultaneously. The two sets of second bevel gears 208 are fixedly installed one-to-one at the ends of two sets of eccentric shafts 207, and the axis of the second bevel gear 208 is coaxial with the axis of the corresponding rotating disk 206. The motor 216 provides a unified power source for the entire pushing mechanism, ensuring consistent power input to the transmission structures on both sides. The meshing transmission of the first bevel gear 215 and the two sets of second bevel gears 208 can synchronously transmit the single-shaft output power of the motor 216 to the eccentric shafts 207 on both sides, driving the rotating disks 206 on both sides to rotate synchronously, ensuring the consistency of the action of the reciprocating transmission structures on both sides, and avoiding conveying jams or stroke errors caused by asynchronous transmission on both sides.

[0033] Specifically, in this embodiment: the blowing and cooling mechanism 3 includes a U-shaped tube 301, which covers the outer surface of the graphite heat dissipation film in the conveying state; the U-shaped tube 301 is fixedly installed in the fastening ring 214, and the fastening ring 214 is fixedly installed at one end of the second connecting arm 211; the lower surface of the upper end air pipe of the U-shaped tube 301 is connected to an air nozzle, which is arranged in a V-shape. The U-shaped tube 301 is placed above the membrane in the conveying state, which can expand the purging coverage area and ensure that the width of the membrane can be purged and covered. The fastening ring 214 fixes the U-shaped tube 301 to the second connecting arm 211, so that the U-shaped tube 301 can move back and forth synchronously with the second connecting arm 211, ensuring the correspondence between the purging area and the membrane conveying area and the perforation processing area. The V-shaped air nozzle can optimize the air jet angle and coverage area, improve the uniformity of purging, effectively remove impurities attached to the membrane surface, and at the same time make the cooling airflow act evenly on the membrane surface, improving the cooling effect.

[0034] Specifically, in this embodiment: a three-way pipe 302 is connected to the lower surface of the U-shaped tube 301, and a corrugated telescopic pipe 303 is connected to the remaining port of the three-way pipe 302; a serpentine heat-conducting pipe 304 is connected to the other end of the corrugated telescopic pipe 303, and the other end of the serpentine heat-conducting pipe 304 is connected to the air outlet of the fan 307; the fan 307 is fixedly installed inside one end of the U-shaped frame 1, and an air filter element 308 is connected to the air intake of the fan 307. Air filter 308 filters the air drawn in by fan 307, removing dust and impurities to ensure the cleanliness of the airflow sprayed onto the membrane surface and prevent secondary pollution of the membrane caused by impurities carried by the airflow. Fan 307 provides stable power for airflow circulation, ensuring stable pressure and flow of the blowing airflow. Serpentine heat pipe 304 extends the heat exchange path of the airflow and improves the cooling efficiency of the airflow. Corrugated telescopic pipe 303 can freely extend and retract with the reciprocating motion of U-shaped pipe 301, adapting to the movement of U-shaped pipe 301, preventing pipe pulling from affecting the normal operation of the mechanism, while ensuring continuous and stable delivery of cooling airflow. T-connector 302 ensures stable connection of the pipes, ensuring that the airflow can be smoothly delivered into U-shaped pipe 301.

[0035] Specifically, in this embodiment: the lower end of the outer surface of the serpentine heat pipe 304 is in contact with the heat conduction plate 305, and the heat conduction plate 305 is fixedly installed on the inner lower surface of the U-shaped frame 1; the lower surface of the heat conduction plate 305 is in contact with the cooling surface of the thermoelectric cooler 306, and a cooling fan is fixedly installed on the heating surface of the lower surface of the thermoelectric cooler 306. The cooling surface of the thermoelectric cooler 306 can continuously transfer cold energy to the serpentine heat pipe 304 through the heat-conducting plate 305, continuously cooling the airflow inside the serpentine heat pipe 304, keeping the airflow sprayed onto the membrane surface at a low temperature, improving the cooling effect on the membrane, and preventing the membrane from deforming due to heat during laser drilling; the heat-conducting plate 305 can expand the cold energy transfer area, ensuring that the cold energy is evenly transferred to the serpentine heat pipe 304, improving heat exchange efficiency; the cooling fan installed on the heating surface of the thermoelectric cooler 306 can quickly remove the heat generated during the operation of the thermoelectric cooler 306, ensuring the continuous and stable operation of the thermoelectric cooler 306 and maintaining a stable cooling effect.

[0036] Specifically, in this embodiment, a rubber buffer pad is fixedly attached to the inner wall of the U-shaped slot of the Y-shaped frame 106. The rubber buffer pad can buffer and dampen shocks when the unwinding column 104 and the winding column 103 are installed in the Y-shaped frame 106, reducing collision and wear between metal parts. At the same time, it can fill the installation gap, improve the stability of the unwinding column 104 and the winding column 103 after installation, and avoid shaking and abnormal noise during equipment operation.

[0037] Specifically, in this embodiment, the surface of the support plate 113 that is in contact with the timing belt 109 is coated with a polytetrafluoroethylene (PTFE) wear-resistant layer. The PTFE wear-resistant layer reduces the sliding friction resistance between the support plate 113 and the timing belt 109, reduces wear during the operation of the timing belt 109, extends the service life of the timing belt 109, and prevents jamming between the support plate 113 and the timing belt 109, ensuring smooth operation of the timing belt 109.

[0038] Specifically, in this embodiment, a dust filter is fixedly installed at the air outlet of the U-shaped tube 301. The dust filter can prevent external dust and debris from entering the U-shaped tube 301 through the air nozzle and causing pipeline blockage when the equipment is stopped, ensuring the smooth flow of the purging airflow. At the same time, it can filter out trace impurities remaining in the airflow, further improving the cleanliness of the purging airflow and preventing impurities from scratching the membrane surface.

[0039] Specifically, in this embodiment, a thermally conductive silicone grease layer is filled between the contact surfaces of the serpentine heat pipe 304 and the heat-conducting plate 305. This thermally conductive silicone grease layer fills the tiny gaps between the contact surfaces of the serpentine heat pipe 304 and the heat-conducting plate 305, improving the heat transfer efficiency between them. This ensures that the cooling energy generated by the thermoelectric cooler 306 can be efficiently transferred to the airflow within the serpentine heat pipe 304, reducing cooling loss between the contact surfaces and improving the airflow cooling effect.

[0040] Specifically, in this embodiment: the single-transmission step L of the graphite heat dissipation film is precisely matched to the preset perforation spacing through the following dedicated control equation, the equation expression is:

[0041] The critical engagement angle β between the toothed plate and the rack satisfies the constraint equation:

[0042] Parameter table:

[0043]

[0044] Example: The eccentricity of the eccentric shaft is e=10mm, the effective meshing tooth height of the gear plate is h=5mm, and the pitch circle radius of the synchronous pulley is R=25mm. The effective length of the connecting rod is l=100mm (adjustable and locked by a hexagonal double-ended bolt). The instantaneous roll diameter of the unwinding column membrane roll is r=50mm, and the membrane tension deformation rate is δ=0.005 (0.5%). The meshing transmission efficiency η1=0.98, the synchronous belt transmission efficiency η2=0.99, and the ratchet idle compensation coefficient γ=0.995.

[0045] Calculation process: Calculate the critical engagement angle β:

[0046]

[0047] Calculate the effective engagement stroke Se:

[0048] Calculate the final conveying step distance L:

[0049] Application instructions: The calculated single-pass conveying step distance is approximately 33.6mm, meaning the hole spacing can be precisely controlled at 33.6mm. If the hole spacing needs adjustment, simply adjust the effective length l of the connecting rod using a hexagonal double-ended bolt; the matching step distance can then be recalculated using the equation, without replacing any hardware components.

[0050] Working principle and process: S1: Pre-processing parameter preset: Based on the preset hole spacing, the required effective length l of the connecting rod is calculated by back-calculating the equation. During rotation, the hexagonal double-headed bolt 210 is used to adjust the distance between the first connecting arm 209 and the second connecting arm 211, and the value of l is locked. S2: Real-time parameter acquisition: During equipment operation, the instantaneous roll diameter r of the film roll on the unwinding column 104 is acquired in real time, and the r parameter in the equation is updated synchronously. S3: Precise step control: Motor 216 drives eccentric shaft 207 to rotate. Each rotation drives synchronous belt 109 to run through effective meshing stroke Se controlled by equation, driving unwinding column 104 to output precise step L, which is perfectly matched with preset hole spacing. S4: Dynamic compensation adjustment: As the film roll diameter r decreases during the unwinding process, the equation automatically compensates for the step deviation caused by the change in roll diameter. At the same time, it corrects transmission loss and film deformation through various compensation coefficients to avoid error accumulation and ensure that the perforation spacing of the entire film roll is completely consistent.

[0051] This equation needle can accurately quantify the correspondence between the linkage adjustment amount and the conveying step distance, solving the problem that the stroke adjustment of this device can only rely on experience and cannot accurately match the preset hole distance, thus greatly improving the control accuracy of the feeding step distance and the consistency of the drilling position.

[0052] Working principle: The power transmission and feeding action of the device are driven by the equidistant pushing mechanism 2. After the motor 216 starts, it drives the first bevel gear 215 to rotate. The first bevel gear 215 meshes with two sets of second bevel gears 208 to drive the rotating disks 206 on both sides and the eccentric shaft 207 to rotate in a circle. The eccentric shaft 207 drives the first connecting arm 209 to move in conjunction. The second connecting arm 211 moves synchronously through the hexagonal double-headed bolt 210. The second connecting arm 211 drives the slide rod 212, which is rotatably connected at the end, to slide back and forth in a straight line along the guide strip openings 107 on both sides of the U-shaped frame 1. The slide rod 212 drives the guide block 213 to slide back and forth along the guide rail 102. The guide block 213 drives the end connecting block 202 and the toothed plate 205 to move synchronously.

[0053] When the toothed plate 205 is pushed forward by the second connecting arm 211, the inclined sliding surface of the toothed plate 205 contacts the inclined sliding surface of the rack 110 on the outer surface of the synchronous belt 109. The toothed plate 205 is compressed and retracts downward into the contraction groove 203 on the connecting block 202. At this time, it will not drive the synchronous belt 109 to rotate. When the toothed plate 205 is pulled back by the second connecting arm 211, the U-shaped spring piece 204 inside the contraction groove 203 pushes the toothed plate 205 upward, causing the toothed plate 205 to extend and engage in the triangular groove between the racks 110. The straight surface of the toothed plate 205 contacts the straight surface of the rack 110, thereby driving the synchronous belt 109 to rotate unidirectionally at equal intervals.

[0054] During operation, the synchronous belt 109 drives the synchronous pulleys 108 on both sides to rotate. The synchronous pulleys 108 drive the I-shaped plate 111 and the ratchet 112 to rotate synchronously. The I-shaped plate 111, through its sleeve engagement with the U-shaped plate 105, drives the unwinding column 104 and the winding column 103 to rotate synchronously in the same direction at a fixed angle, thereby realizing the equidistant step-by-step conveying of the graphite heat dissipation film. The support plate 113 inside the synchronous belt 109 always fits and supports the inner ring surface of the synchronous belt 109, preventing the synchronous belt 109 from becoming loose and sagging, and ensuring the stability of the transmission process.

[0055] The purging and cooling mechanism 3 operates synchronously with the equidistant pushing mechanism 2. After the fan 307 starts, it draws in outside air through the air intake. The air is filtered by the air filter element 308 and then enters the serpentine heat conduction pipe 304. The thermoelectric cooler 306 is powered on and operates. The cooling surface conducts low-temperature heat to the serpentine heat conduction pipe 304 through the heat conduction plate 305, cooling the airflow inside the pipe. The cooled airflow then passes through the corrugated telescopic pipe 303 and the tee pipe 302 into the U-shaped pipe 301, and finally is sprayed onto the surface of the graphite heat dissipation film through the air nozzle at the lower end of the U-shaped pipe 301. The corrugated telescopic pipe 303 extends and retracts synchronously with the reciprocating motion of the second connecting arm 211. The U-shaped pipe 301 moves synchronously with the second connecting arm 211 through the fastening ring 214, so that the purging and cooling area and the film conveying perforation area always remain aligned.

[0056] After the graphite heat dissipation film steps to the designated position, the laser drilling equipment installed inside the U-shaped frame 101 performs fixed-point drilling on the film. After completing a single drilling, the equidistant pushing mechanism 2 continues to operate, driving the graphite heat dissipation film to the next drilling position, and continuously completing the drilling operation. After the drilling is completed, the graphite heat dissipation film is continuously wound up by the winding column 103.

[0057] All parts not described in this invention are the same as or can be implemented using existing technology. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A laser drilling device for a graphite heat dissipation film, comprising a U-shaped frame (1), wherein a U-shaped frame (101) is fixedly installed on the upper part of the outer surface of the U-shaped frame (1), and the lower inner surface of the U-shaped frame (101) is used to install a laser drilling device; two sets of Y-shaped frames (106) are fixedly installed on both sides of the outer surface of the U-shaped frame (1) in a longitudinally opposite manner by bolts, wherein each pair of longitudinally opposite Y-shaped frames (106) is respectively rotatably equipped with an unwinding column (104) and a winding column (103), and the outer surface of the unwinding column (104) is used to wind up the graphite heat dissipation film; characterized in that: An equidistant pushing mechanism (2) is fixedly installed at one end of the inner side of the U-shaped frame (1). The driving end of the equidistant pushing mechanism (2) is used to reciprocate to drive the unwinding column (104) and the winding column (103) to rotate by a preset angle to control the conveying distance of the graphite heat dissipation film. A blowing and cooling mechanism (3) is installed at the other end of the inner upper surface of the U-shaped frame (1). The blowing and cooling end of the blowing and cooling mechanism (3) extends above the graphite heat dissipation film conveyed between the unwinding column (104) and the winding column (103) to blow and cool it during the conveying process of the graphite heat dissipation film.

2. The laser drilling device for graphite heat dissipation film according to claim 1, characterized in that: Each Y-shaped frame (106) is fixedly equipped with a ratchet (112) at one end. An I-shaped plate (111) is fixedly installed inside the rotating ring of the ratchet (112). One end of the I-shaped plate (111) extends into the interior of the Y-shaped frame (106). The outer surface of the I-shaped plate (111) is used for the U-shaped plate (105) to fit into the sleeve. The U-shaped plate (105) is fixedly installed on the shafts fixedly provided on both sides of the unwinding column (104) and the winding column (103) so that when the unwinding column (104) and the winding column (103) are installed in the Y-shaped frame (106), they can be driven to rotate by the I-shaped plate (111).

3. The laser drilling device for graphite heat dissipation film according to claim 2, characterized in that: A synchronous wheel (108) is fixedly installed at the other end of the I-shaped plate (111). The synchronous wheel (108) is located on the outside of the U-shaped frame (1). The outer surfaces of the two sets of synchronous wheels (108) on both sides of the U-shaped frame (1) are fitted with a synchronous belt (109) so that the unwinding column (104) and the winding column (103) can rotate synchronously in the same direction under the drive of the synchronous belt (109) through the I-shaped plate (111).

4. The laser drilling device for graphite heat dissipation film according to claim 3, characterized in that: A support plate (113) is provided on the inner side of the synchronous belt (109), and the upper and lower surfaces of the support plate (113) are respectively slidably attached to the upper and lower surfaces of the inner annular surface of the synchronous belt (109).

5. The laser drilling device for graphite heat dissipation film according to claim 1, characterized in that: The equidistant pushing mechanism (2) includes a mounting plate (201), which is fixedly installed inside the U-shaped frame (1); both ends of the inner side of the mounting plate (201) are rotatably mounted with rotating disks (206), one end of the rotating disk (206) is fixedly mounted with an eccentric shaft (207), and the outer surface of the eccentric shaft (207) is rotatably connected with a first connecting arm (209); the other end of the first connecting arm (209) is threadedly connected to the threaded part of one end of a hexagonal double-ended bolt (210), the hexagonal double-ended bolt... The threaded part of the other end of the bolt (210) is threadedly connected to a second connecting arm (211); one end of the second connecting arm (211) is rotatably equipped with a slide rod (212), the slide rod (212) slides through the guide bar openings (107) on both sides of the U-shaped frame (1), and the end of the slide rod (212) that protrudes from the guide bar openings (107) is fixedly installed with a guide rail block (213); the guide rail block (213) is slidably installed on the outer surface of the guide rail (102), and the guide rail (102) is fixedly installed on both sides of the U-shaped frame (1).

6. The laser drilling device for graphite heat dissipation film according to claim 5, characterized in that: A connecting block (202) is fixedly installed at one end of the guide block (213). A shrinkage groove (203) is provided on the upper surface of the connecting block (202). A toothed plate (205) is vertically slidably installed in the shrinkage groove (203). The toothed plate (205) is used to mesh with the triangular groove formed between multiple sets of racks (110). The multiple sets of racks (110) are fixedly embedded at equal intervals on the outer surface of the synchronous belt (109). A U-shaped spring piece (204) is fixedly connected to the inner lower surface of the shrinkage groove (203). The upper end of the U-shaped spring piece (204) abuts against the lower surface of the toothed plate (205) to engage with the toothed plate (205). 05) Apply an upward elastic thrust; when the toothed plate (205) is pushed forward with the second connecting arm (211), the inclined sliding surface of the toothed plate (205) abuts against the inclined sliding surface of the rack (110), so that the toothed plate (205) is pressed into the shrinkage groove (203); when the toothed plate (205) is pushed to the farthest position and pulled back with the second connecting arm (211), under the elastic thrust of the U-shaped spring (204), the toothed plate (205) extends out again and meshes in the triangular groove between the rack (110). At this time, the straight surface of the toothed plate (205) abuts against the straight surface of the rack (110) to drive the synchronous belt (109) to achieve equidistant transmission.

7. The laser drilling device for graphite heat dissipation film according to claim 5, characterized in that: A motor (216) is fixedly installed at one end of the mounting plate (201). A first bevel gear (215) is fixedly installed at the end of the output shaft of the motor (216). The first bevel gear (215) meshes with two sets of second bevel gears (208). The two sets of second bevel gears (208) are fixedly installed at the ends of two sets of eccentric shafts (207) in a one-to-one correspondence. The axis of the second bevel gear (208) is coaxial with the axis of the corresponding rotating disk (206).

8. The laser drilling device for graphite heat dissipation film according to claim 1, characterized in that: The purging and cooling mechanism (3) includes a U-shaped tube (301), which covers the outer surface of the graphite heat dissipation film in the conveying state; the U-shaped tube (301) is fixedly installed in a fastening ring (214), which is fixedly installed at one end of the second connecting arm (211); the lower surface of the upper end air pipe of the U-shaped tube (301) is connected to an air nozzle, which is V-shaped.

9. The laser drilling device for graphite heat dissipation film according to claim 8, characterized in that: The lower surface of the U-shaped tube (301) is connected to a three-way pipe (302), and the remaining port of the three-way pipe (302) is connected to a corrugated expansion pipe (303); the other end of the corrugated expansion pipe (303) is connected to a serpentine heat-conducting pipe (304), and the other end of the serpentine heat-conducting pipe (304) is connected to the air outlet of the fan (307); the fan (307) is fixedly installed inside one end of the U-shaped frame (1), and the air inlet of the fan (307) is connected to an air filter element (308).

10. The laser drilling device for graphite heat dissipation film according to claim 9, characterized in that: The lower end of the outer surface of the serpentine heat pipe (304) is in contact with the heat-conducting plate (305), and the heat-conducting plate (305) is fixedly installed on the inner lower surface of the U-shaped frame (1); the lower surface of the heat-conducting plate (305) is in contact with the cooling surface of the thermoelectric cooler (306), and a cooling fan is fixedly installed on the heating surface of the lower surface of the thermoelectric cooler (306).

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