HDI circuit board laser drilling device

Abstract

This invention discloses a laser drilling device for HDI circuit boards, specifically relating to the field of HDI circuit board drilling technology. It includes an operating table, with a rotating mechanism rotatably connected to the right side of the upper center of the operating table, a transmission mechanism rotatably connected to the front side of the upper center of the operating table, and a drilling mechanism fixedly connected to the middle of the upper center of the operating table. An air blowing mechanism is provided on the lower left side of the drilling mechanism. This HDI circuit board laser drilling device, during the descent of the laser drilling head, uses a baffle plate in conjunction with a rectangular block to automatically and accurately position the HDI circuit board, improving drilling accuracy and efficiency. During drilling, the nozzle, in conjunction with a limiting tube and a slider, helps remove debris and dust generated during drilling. Simultaneously, during the laser drilling head resetting process, a soft brush cleans the surface of the HDI circuit board after drilling, removing residual debris and dust and ensuring the cleanliness of the HDI circuit board.

Description

Technical Field

[0001] This invention relates to the field of HDI circuit board drilling technology, and in particular to a laser drilling device for HDI circuit boards. Background Technology

[0002] HDI (High-Density Interconnect) circuit boards are a type of printed circuit board (PCB) manufactured using a technology that utilizes micro-blind vias for high-density circuitry. Laser drilling of HDI circuit boards is an advanced manufacturing process that leverages the high energy density and focusing ability of a laser beam to achieve fast and precise drilling. During HDI circuit board laser drilling, it's crucial to note that the performance of the laser drilling machine directly impacts the drilling quality and efficiency. A stable and high-precision laser drilling machine must be selected, along with appropriate fixtures and positioning systems, to ensure drilling accuracy and stability. After drilling, the holes need to be cleaned and treated to remove debris and residue generated during the drilling process.

[0003] Chinese Patent Publication No. CN214815853U discloses a laser drilling device for HDI circuit boards, including a processing table. Vertical plates are symmetrically arranged on both sides of the top of the processing table, and a horizontal plate is arranged on top of the vertical plates. A laser drill is mounted on the horizontal plate. An HDI circuit board is mounted on the top of the processing table. A fixing plate is located on the left side of the HDI circuit board, positioned on the top of the processing table. A clamping mechanism is located on the right side of the HDI circuit board. A square opening is formed inside the processing table, penetrating vertically. Support legs and a guide tray are arranged at the bottom of the processing table. The guide tray is connected to the processing table via a connecting component. A placement plate is arranged between the support legs. This invention, through the clamping mechanism, can clamp and fix the HDI circuit board, making the HDI circuit board more stable during drilling. The guide tray and collection box can collect the waste generated during drilling.

[0004] Although the above-mentioned device has a simple structure, it cannot be automatically positioned by cooperation during the actual implementation process, and it cannot achieve the effect of cleaning after drilling is completed. Summary of the Invention

[0005] The main objective of this invention is to provide a laser drilling device for HDI circuit boards, which can effectively solve the problems of not being able to automatically position the holes through cooperation and not being able to clean them after drilling.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A laser drilling device for HDI circuit boards includes an operating table. A clamping mechanism is symmetrically arranged on the rear side of the upper end of the operating table. A rotating mechanism is rotatably connected to the right side of the middle part of the upper end of the operating table. A transmission mechanism is rotatably connected to the front side of the upper end of the operating table. A drilling mechanism is fixedly connected to the middle part of the upper end of the operating table. An air blowing mechanism is arranged on the lower left side of the drilling mechanism.

[0008] Preferably, a feeding roller is fixedly connected to the rear side of the upper end of the operating platform, guide rails are symmetrically fixedly connected to the upper end of the operating platform, a through hole is opened on the right side of the middle part of the upper end of the operating platform, and a discharging roller is fixedly connected to the front side of the upper end of the operating platform.

[0009] Preferably, the transmission mechanism includes a motor fixedly connected to the front side of the upper end of the operating platform, a one-way rotating shaft fixedly connected to the output end of the motor, a two-way lead screw fixedly connected to the rear end of the one-way rotating shaft, a slider II provided on the rear side of the outer surface of the two-way lead screw, and a threaded rod connected to the middle of the outer surface of the motor output end.

[0010] Preferably, the clamping mechanism includes a rectangular block that is slidably connected to the outer surface of the guide rail. A limit plate is symmetrically fixedly connected to the left side of the upper end of the rectangular block. A slide plate is provided on the upper end of the rectangular block. A rotating rod is rotatably connected to the front side of the lower end of the slide plate. The front side of the lower end of the rotating rod is rotatably connected to the upper end of the second slider.

[0011] Preferably, a guide rod is fixedly connected to the middle of the upper end of the rectangular block, a rectangular plate is fixedly connected to the right side of the upper end of the rectangular block, the outer surface of the guide rod is slidably connected to the lower end of the slide plate, and several rubber rollers are fixedly connected to the left side of the upper end of the slide plate.

[0012] Preferably, the blowing mechanism includes a slider that is threaded to the rear side of the outer surface of the threaded rod, a limit tube is fixedly connected to the rear end of the slider, a hose is provided on the rear side of the outer surface of the limit tube, and a plurality of nozzles are fixedly connected to the output end of the hose.

[0013] Preferably, a second one-way valve is fixedly connected to the front side of the outer surface of the limiting tube, a first one-way valve is fixedly connected to the rear side of the outer surface of the limiting tube, and the lower side of the outer surface of the hose is fixedly connected to the first one-way valve.

[0014] Preferably, the drilling mechanism includes a hydraulic cylinder fixedly connected to the middle of the upper end of the operating platform, a push plate fixedly connected to the output end of the hydraulic cylinder, a laser drilling head fixedly connected to the middle of the lower end of the push plate, a rack fixedly connected to the right side of the laser drilling head, and the rear side of the push plate fixedly connected to the upper end of the nozzle.

[0015] Preferably, the rotating mechanism includes a gear that can mesh with the rear end of the rack, a first rotating roller is fixedly connected to the inner surface of the gear, a second rotating roller is drivenly connected to the left side of the outer surface of the first rotating roller, a circular plate is fixedly connected to the lower part of the outer surface of the second rotating roller, and a soft brush is fixedly connected to the upper part of the outer surface of the second rotating roller.

[0016] Preferably, a baffle is fixedly connected to the rear side of the upper end of the circular plate, and the second rotating roller is rotatably connected to the upper end of the operating table.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. This invention, through the cooperation of the drilling mechanism, rotating mechanism, and clamping mechanism, can achieve precise positioning of HDI circuit boards. This not only improves drilling accuracy but also reduces the scrap rate caused by inaccurate positioning. Simultaneously, the air blowing mechanism continuously blows air during drilling, helping to remove debris and heat generated during the drilling process, maintaining the cleanliness and temperature stability of the drilling area, thereby further improving drilling quality and efficiency. During the resetting process of the drilling mechanism, the rotating mechanism cleans the surface of the HDI circuit board, effectively removing dust and debris, improving the cleanliness and quality of the circuit board, and providing a good foundation for subsequent electronic component installation and soldering.

[0019] 2. This invention utilizes a rack and pinion mechanism with gears to rotate a baffle during the descent of the laser drilling head. The baffle, in conjunction with a rectangular block, automatically and accurately positions the HDI circuit board, avoiding errors from manual positioning and improving drilling accuracy and efficiency. It achieves coordinated work between the baffle and the rectangular block. During drilling, the nozzle, in conjunction with the limiting tube and slider, helps remove debris and dust generated during drilling. This not only more effectively removes debris from the hole, preventing blockage or affecting drilling quality, but also provides cooling, reducing the operating temperature of the laser drilling head and extending its service life. Simultaneously, during the laser drilling head resetting process, a soft brush cleans the surface of the HDI circuit board after drilling, removing residual debris and dust, ensuring the cleanliness of the HDI circuit board, and further improving the quality and efficiency of subsequent processes. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the overall structure of the present invention from another perspective;

[0022] Figure 3 This is a partial structural diagram of the present invention;

[0023] Figure 4 This is a schematic diagram of the transmission mechanism structure of the present invention;

[0024] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A in the middle;

[0025] Figure 6 This is a schematic diagram of the clamping mechanism of the present invention;

[0026] Figure 7 This is a schematic diagram of the operating structure of the clamping mechanism of the present invention;

[0027] Figure 8 This is a schematic diagram of the drilling mechanism structure of the present invention;

[0028] Figure 9 This is a schematic diagram of the rotating mechanism structure of the present invention;

[0029] Figure 10 This is a schematic diagram of the air blowing mechanism of the present invention.

[0030] In the diagram: 1. Operating table; 11. Feeding roller; 12. Guide rail; 13. Through hole; 14. Discharging roller; 2. Clamping mechanism; 21. Rectangular block; 211. Rectangular plate; 212. Guide rod; 22. Limiting plate; 23. Slide plate; 231. Rubber roller; 24. Rotating rod; 3. Rotating mechanism; 31. Rotating roller one; 32. Gear; 33. Rotating roller two; 34. Circular plate; 341. Baffle; 35. Soft brush; 4. Drilling mechanism; 41. Hydraulic cylinder; 42. Push plate; 43. Laser drilling head; 44. Rack; 5. Air blowing mechanism; 51. Slider one; 52. Limiting tube; 521. One-way valve one; 522. One-way valve two; 53. Hose; 54. Nozzle; 6. Transmission mechanism; 61. Motor; 62. Two-way lead screw; 63. Slider two; 64. Threaded rod; 65. One-way rotating shaft. Detailed Implementation

[0031] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0032] Example 1, as Figure 1 and Figure 2 As shown, an HDI circuit board laser drilling device includes an operating table 1, a clamping mechanism 2 symmetrically arranged on the rear side of the upper end of the operating table 1, a rotating mechanism 3 rotatably connected to the right side of the middle part of the upper end of the operating table 1, a transmission mechanism 6 rotatably connected to the front side of the upper end of the operating table 1, a drilling mechanism 4 fixedly connected to the middle part of the upper end of the operating table 1, and an air blowing mechanism 5 arranged on the left side of the lower part of the drilling mechanism 4.

[0033] When drilling is required on an HDI circuit board, the HDI circuit board to be drilled is intermittently conveyed to the upper rear side of the operating table 1 by the conveying device in the prior art. Then, the transmission mechanism 6 and two clamping mechanisms 2 clamp the HDI circuit board and move it forward. During the forward movement of the HDI circuit board, the drilling mechanism 4 and the rotating mechanism 3 are used to automatically position the HDI circuit board in preparation for laser drilling. This facilitates the drilling mechanism 4 to drill the HDI circuit board. At the same time, the transmission mechanism 6 and the air blowing mechanism 5 continuously blow air onto the HDI circuit board during the cutting process to avoid small particles generated during the drilling process from affecting subsequent drilling operations.

[0034] Similarly, after drilling is completed, the HDI circuit board surface is cleaned by the rotation mechanism 3 during the resetting process of the drilling mechanism 4, which facilitates the subsequent operation of the HDI circuit board. Then, the transmission mechanism 6, together with the clamping mechanism 2, transports the HDI circuit board after drilling to the front of the upper end of the operating table 1, which facilitates the subsequent operation of the HDI circuit board.

[0035] During the operation of this embodiment, the drilling mechanism 4, in conjunction with the rotating mechanism 3 and the clamping mechanism 2, enables precise positioning of the HDI circuit board. This not only improves drilling accuracy but also reduces the scrap rate caused by inaccurate positioning. Simultaneously, the air blowing mechanism 5 continuously blows air during the drilling process, helping to remove debris and heat generated during drilling, maintaining the cleanliness and temperature stability of the drilling area, thereby further improving the quality and efficiency of drilling. During the resetting process of the drilling mechanism 4, it drives the rotating mechanism 3 to clean the surface of the HDI circuit board. This not only effectively removes dust and debris from the surface of the HDI circuit board but also improves the cleanliness and quality of the circuit board, providing a good foundation for subsequent electronic component installation and soldering.

[0036] Example 2: Based on Example 1, this example aims to achieve the effect of positioning the baffle 341 in conjunction with the rectangular block 21 during the descent of the laser drilling head 43, and simultaneously cleaning the surface of the HDI circuit board after drilling using a soft brush 35 during the resetting process of the laser drilling head 43.

[0037] See Figure 3 A feeding roller 11 is fixedly connected to the rear side of the upper end of the operating platform 1. A guide rail 12 is symmetrically fixedly connected to the upper end of the operating platform 1. A through hole 13 is opened on the right side of the middle part of the upper end of the operating platform 1. A discharging roller 14 is fixedly connected to the front side of the upper end of the operating platform 1.

[0038] The HDI circuit board is intermittently conveyed to the upper front side of the feeding roller 11 by the existing conveying device, so that the two clamping mechanisms 2 can cooperate to clamp and convey it. Similarly, when the two clamping mechanisms 2 cooperate to convey the HDI circuit board to the upper end of the front unloading roller 14, the two clamping mechanisms 2 no longer clamp, so as to facilitate the subsequent picking operation of the HDI circuit board. The two guide rails 12 cooperate with the two clamping mechanisms 2 to guide it and avoid positional deviation during the movement.

[0039] See Figure 4 and Figure 5 The transmission mechanism 6 includes a motor 61 fixedly connected to the front side of the upper end of the operating table 1. A one-way rotating shaft 65 is fixedly connected to the output end of the motor 61. A two-way lead screw 62 is fixedly connected to the rear end of the one-way rotating shaft 65. A slider 63 is provided on the rear side of the outer surface of the two-way lead screw 62. A threaded rod 64 is connected to the middle of the outer surface of the output end of the motor 61.

[0040] The aforementioned one-way rotating shaft 65 is composed of an outer ring, an inner ring, rollers, and a spring, and its working principle is as follows:

[0041] Outer ring: Usually fixed to the shell or connected to other components, forming a cylindrical structure;

[0042] Inner ring: The inner ring has a relatively special structure. It has a sloping circle, which is a one-way rotating shaft 65 to realize one-way rotation and locking functions.

[0043] Roller: The roller is always in contact with the inner and outer rings, and its working surface is also a slope;

[0044] Spring: The spring contacts the roller to hold the roller in place and provides a restoring force when needed;

[0045] Therefore, the unidirectional rotating shaft 65 mentioned above is a conventional setting in the prior art, and will not be described in detail in this solution.

[0046] See Figure 5 With the cooperation of the one-way rotating shaft 65, when the output end of the motor 61 rotates forward, it drives the one-way rotating shaft 65 and the two-way lead screw 62 to rotate simultaneously. When the output end of the motor 61 rotates in reverse, the two-way lead screw 62 stops rotating with the cooperation of the one-way rotating shaft 65.

[0047] In the above-mentioned motor 61, the outer surface of the motor 61 is connected to the threaded rod 64 via a transmission belt in the prior art. At the same time, the radius of the pulley fixed to the outer surface of the motor 61 is smaller than that of the pulley fixed to the outer surface of the threaded rod 64, that is, the rotation speed of the threaded rod 64 is slower during the rotation of the motor 61.

[0048] Specifically, when it is necessary to transfer the HDI circuit board, the motor 61 is activated to make its output end rotate forward. Then, the one-way rotating shaft 65 and the two-way lead screw 62 rotate simultaneously, which can drive the slider 63 to move forward. At the same time, the rotation of the motor 61 drives the threaded rod 64 to rotate continuously through the transmission belt.

[0049] See Figure 6 and Figure 7 The clamping mechanism 2 includes a rectangular block 21 that is slidably connected to the outer surface of the guide rail 12. A limit plate 22 is symmetrically fixedly connected to the left side of the upper end of the rectangular block 21. A slide plate 23 is provided on the upper end of the rectangular block 21. A rotating rod 24 is rotatably connected to the front side of the lower end of the slide plate 23. The front side of the lower end of the rotating rod 24 is rotatably connected to the upper end of the slider 63.

[0050] Furthermore, when slider 263 is driven forward, it drives the front ends of the two rotating rods 24 forward. At the same time, the rotation of the two rotating rods 24 will drive the two sliding plates 23 to move. Simultaneously, due to the cooperation of the rectangular block 21, the two sliding plates 23 move closer to each other. When the two sliding plates 23 move to be in close contact with the two limiting plates 22 on the same side, the rotating rod 24 continues to be driven forward by slider 263. At this time, the two sliding plates 23 no longer move closer. The rotating rod 24 moves forward as a whole through the sliding plates 23 and the rectangular block 21. At the same time, the two sliding plates 23 that are close to each other clamp the HDI circuit board to be drilled and move forward, ready to drill.

[0051] See Figure 6 A guide rod 212 is fixedly connected to the middle of the upper end of the rectangular block 21, and a rectangular plate 211 is fixedly connected to the right side of the upper end of the rectangular block 21. The outer surface of the guide rod 212 is slidably connected to the lower end of the slide plate 23, and several rubber rollers 231 are fixedly connected to the left side of the upper end of the slide plate 23.

[0052] See Figure 7 When the HDI circuit board on the upper front side of the feeding roller 11 needs to be clamped and moved forward, the motor 61 is activated to drive the slider 63 to move forward, thereby driving the two rotating rods 24 to pull the two matching slide plates 23 to move. The two slide plates 23 move along the guide rod 212 to move closer to each other. Then, the two slide plates 23 will drive the upper rubber rollers 231 to move closer to each other. When the two slide plates 23 move to be in close contact with the two matching limit plates 22, the upper rubber rollers 231 on both sides cooperate to clamp the HDI circuit board.

[0053] Subsequently, the rotating rod 24 continues to be driven forward by the slider 63, and then the several rubber rollers 231 on both sides clamp the HDI circuit board. Then, the two rotating rods 24, through the sliding plate 23 and the guide rod 212, drive the rectangular block 21 to slide forward along the surface of the guide rail 12, in preparation for laser drilling.

[0054] After drilling and unloading are completed, slider 2 63 moves backward along the bidirectional lead screw 62, and then pushes the two rotating rods 24 backward. At this time, the two rotating rods 24 drive the slide plate 23 and several rubber rollers 231 to move away from each other. At this time, the HDI circuit board is located on the upper end of the unloading roller 14, and the rubber rollers 231 on both sides no longer clamp the HDI circuit board, which facilitates the subsequent processing and removal of the HDI circuit board. Then, the rotating rods 24 move backward in conjunction with the slide plate 23 and the rectangular block 21 to perform the next HDI circuit board clamping movement.

[0055] See Figure 8 The drilling mechanism 4 includes a hydraulic cylinder 41 fixedly connected to the upper middle part of the operating table 1. A push plate 42 is fixedly connected to the output end of the hydraulic cylinder 41. A laser drilling head 43 is fixedly connected to the lower middle part of the push plate 42. A rack 44 is fixedly connected to the right side of the laser drilling head 43.

[0056] When the rubber rollers 231 on both sides cooperate to clamp the HDI circuit board and move forward, the hydraulic cylinder 41 is activated. Then the output end of the hydraulic cylinder 41 pushes the push plate 42 downward, which in turn causes the laser drilling head 43 and the rack 44 to move downward simultaneously until the laser drilling head 43 reaches the specified drilling height, at which point the operation of the hydraulic cylinder 41 can be stopped.

[0057] See Figure 9 The rotating mechanism 3 includes a gear 32 that can mesh with the rear end of the rack 44. A first rotating roller 31 is fixedly connected to the inner surface of the gear 32. A second rotating roller 33 is drivenly connected to the left side of the outer surface of the first rotating roller 31. A circular plate 34 is fixedly connected to the lower part of the outer surface of the second rotating roller 33. A soft brush 35 is fixedly connected to the upper part of the outer surface of the second rotating roller 33.

[0058] Furthermore, when the rack 44 is pushed downward by the push plate 42, the rack 44 and the gear 32 begin to mesh, that is, the rack 44 moves downward to make the gear 32 rotate, and the gear 32 drives the rotating roller 31 to rotate in the same direction during the rotation process.

[0059] The first rotating roller 31 and the second rotating roller 33 mentioned above are connected by a bevel gear transmission group in the prior art. When the first rotating roller 31 rotates, the second rotating roller 33 can rotate at the same time. The specific transmission principle will not be described in detail in this solution.

[0060] Furthermore, the rotating roller 31 drives the rotating roller 33 to rotate, which in turn drives the soft brush 35 to rotate around the axis of the rotating roller 33 towards the side of the gear 32. At the same time, the circular plate 34 and the rotating roller 33 will rotate in the same direction.

[0061] See Figure 9 A baffle 341 is fixedly connected to the rear side of the upper end of the circular plate 34, and the rotating roller 33 is rotatably connected to the upper end of the operating table 1.

[0062] When the rotating roller 33 drives the circular plate 34 to rotate in the same direction, it will drive the baffle 341 to rotate around the axis of the circular plate 34 to the side away from the gear 32. When the laser drilling head 43 descends to the appropriate drilling height, the rack 44 cooperates with the gear 32, so that the baffle 341 and the soft brush 35 both rotate 90 degrees.

[0063] When the output of motor 61 rotates forward, the bidirectional lead screw 62 rotates, and the slider 63 drives the two rotating rods 24 to move forward. During this process, the two rectangular blocks 21 move forward along the surface of the guide rail 12. When the front end of one rectangular block 21 moves to be in close contact with the rear side of the baffle 341, the forward rotation of the output of motor 61 is paused, and the position of the two rectangular blocks 21 stops moving. At this time, the laser drilling head 43 is also moved downward to a suitable height by the output of hydraulic cylinder 41 in conjunction with the push plate 42, and then the laser drilling head 43 can be activated to drill.

[0064] See Figure 10 The blowing mechanism 5 includes a slider 51 that is threaded to the rear side of the outer surface of the threaded rod 64. A limit tube 52 is fixedly connected to the rear end of the slider 51. A hose 53 is provided on the rear side of the outer surface of the limit tube 52. Several nozzles 54 are fixedly connected to the output end of the hose 53. The rear side of the push plate 42 is fixedly connected to the upper end of the nozzles 54.

[0065] When motor 61 is activated, its output end rotates, driving slider 2 63 to rotate via the transmission belt. Slider 1 51 moves forward along slider 2 63. As slider 1 51 moves, it pulls the limit tube 52. At the same time, as push plate 42 moves downward, it drives one end of several nozzles 54 and hose 53 to move downward simultaneously. Similarly, the air outlet angle of several nozzles 54 is adjusted so that the gas blown out by several nozzles 54 blows forward in a unified manner. This makes it easier for the laser drilling head 43 to continuously blow air through several nozzles 54 during the drilling process, blowing out small particles generated during the drilling process and avoiding affecting the cutting and drilling of the entire HDI circuit board.

[0066] See Figure 10 One-way valve 2 522 is fixedly connected to the front side of the outer surface of the limiting tube 52, and one-way valve 1 521 is fixedly connected to the rear side of the outer surface of the limiting tube 52. The lower side of the outer surface of the hose 53 is fixedly connected to one-way valve 1 521.

[0067] When the output of motor 61 rotates forward, driving the threaded rod 64 to rotate, the slider 51 drives the front end of the limiting tube 52 to move forward. At the same time, external gas enters the limiting tube 52 through the one-way valve 522. When preparing to drill through the laser drilling head 43, the output of motor 61 reverses, which in turn drives the threaded rod 64 to reverse. This allows the slider 51 to drive the front end of the limiting tube 52 to move backward. Simultaneously, the one-way valve 521 allows the gas inside the limiting tube 52 to enter the hose 53 and then be ejected from several nozzles 54. During the continuous drilling process of the laser drilling head 43, air is blown onto the HDI circuit board to prevent small particles from affecting subsequent drilling.

[0068] Then, after all drilling is completed, the hydraulic cylinder 41 is activated, causing its output end to drive the push plate 42 and the laser drilling head 43 to move upward and reset. Similarly, through the cooperation of the rack 44 and the gear 32, the rack 44 drives the gear 32 to rotate during its upward movement, causing the soft brush 35 to rotate away from the gear 32. During the rotation of the soft brush 35, the lower end of the soft brush 35 passes over the upper end of the HDI circuit board held by the rubber rollers 231 on both sides. During the rotation of the soft brush 35, the upper end of the HDI circuit board can be cleaned, so that the HDI circuit board achieves preliminary cleaning after drilling, which facilitates the subsequent processing operation of the HDI circuit board.

[0069] As the soft brush 35 rotates, the baffle 341 rotates towards the side closer to the gear 32. Then the baffle 341 no longer blocks the front end of the rectangular block 21, and the output end of the motor 61 can rotate forward. Through the cooperation of the one-way rotating shaft 65 and the two-way lead screw 62, the slider 2 63 continues to drive the two rotating rods 24 on both sides to move forward.

[0070] At this time, the output end of motor 61 rotates forward, driving the threaded rod 64 to rotate forward. That is, slider 51 continues to drive the front end of limit tube 52 to move forward. At the same time, because the radius of the pulley on the outer surface of motor 61 is different from that on the outer surface of threaded rod 64, the rotation speed of threaded rod 64 is slower. This allows slider 63 to move forward to the lower end of feed roller 14 and then continue to move backward to the lower end of feed roller 11. At this time, slider 51 moves forward along the surface of threaded rod 64, but does not move to the front end of threaded rod 64.

[0071] Furthermore, when the threaded rod 64 reverses and drives the slider 51 to move backward, the slider 51 can be moved to the rear end of the threaded rod 64 by rotating the motor 61.

[0072] Therefore, this solution uses rack 44 and gear 32 to drive baffle 341 to rotate during the descent of laser drilling head 43. Baffle 341, in conjunction with rectangular block 21, can automatically and accurately position the HDI circuit board, avoiding errors from manual positioning and improving drilling accuracy and efficiency. This achieves the coordinated work of baffle 341 and rectangular block 21. During drilling, nozzle 54, in conjunction with limit tube 52 and slider 51, helps to remove debris and dust generated during drilling. This not only more effectively removes debris from the hole, preventing it from clogging the hole or affecting drilling quality, but also provides cooling, reducing the working temperature of the laser drilling head and extending its service life. Simultaneously, during the resetting process of laser drilling head 43, soft brush 35 is used to clean the surface of the HDI circuit board after drilling, removing residual debris and dust, ensuring the cleanliness of the HDI circuit board, and also helping to improve the quality and efficiency of subsequent processes (such as electroplating, welding, etc.).

[0073] It should be noted that the specific installation method, circuit connection method, and control method of the hydraulic cylinder 41 and motor 61 used in this invention are all conventional designs, and will not be described in detail here.

[0074] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A laser drilling device for HDI circuit boards, comprising an operating table (1), characterized in that: The operating platform (1) is symmetrically provided with clamping mechanisms (2) on the rear side of the upper end. The operating platform (1) is rotatably connected to the right side of the middle part of the upper end with a rotating mechanism (3). The operating platform (1) is rotatably connected to the front side of the upper end with a transmission mechanism (6). The operating platform (1) is fixedly connected to the middle part of the upper end with a drilling mechanism (4). The drilling mechanism (4) is provided with an air blowing mechanism (5) on the lower left side. The upper rear side of the operating table (1) is fixedly connected to a feeding roller (11), the upper end of the operating table (1) is symmetrically fixedly connected to a guide rail (12), the upper middle right side of the operating table (1) is provided with a through hole (13), and the upper front side of the operating table (1) is fixedly connected to a discharging roller (14). The transmission mechanism (6) includes a motor (61) fixedly connected to the front side of the upper end of the operating table (1). The output end of the motor (61) is fixedly connected to a one-way rotating shaft (65). The rear end of the one-way rotating shaft (65) is fixedly connected to a two-way lead screw (62). A slider two (63) is provided on the rear side of the outer surface of the two-way lead screw (62). A threaded rod (64) is drivenly connected to the middle of the outer surface of the output end of the motor (61). The clamping mechanism (2) includes a rectangular block (21) that is slidably connected to the outer surface of the guide rail (12). A limit plate (22) is symmetrically fixedly connected to the left side of the upper end of the rectangular block (21). A slide plate (23) is provided on the upper end of the rectangular block (21). A rotating rod (24) is rotatably connected to the front side of the lower end of the slide plate (23). The front side of the lower end of the rotating rod (24) is rotatably connected to the upper end of the second slider (63). A guide rod (212) is fixedly connected to the middle of the upper end of the rectangular block (21), and a rectangular plate (211) is fixedly connected to the right side of the upper end of the rectangular block (21). The outer surface of the guide rod (212) is slidably connected to the lower end of the slide plate (23), and several rubber rollers (231) are fixedly connected to the left side of the upper end of the slide plate (23). The blowing mechanism (5) includes a slider (51) that is threaded to the rear side of the outer surface of the threaded rod (64). A limiting tube (52) is fixedly connected to the rear end of the slider (51). A hose (53) is provided on the rear side of the outer surface of the limiting tube (52). A plurality of nozzles (54) are fixedly connected to the output end of the hose (53). One-way valve 2 (522) is fixedly connected to the front side of the outer surface of the limiting tube (52), and one-way valve 1 (521) is fixedly connected to the rear side of the outer surface of the limiting tube (52). The lower side of the outer surface of the hose (53) is fixedly connected to one-way valve 1 (521).

2. The laser drilling device for HDI circuit boards according to claim 1, characterized in that: The drilling mechanism (4) includes a hydraulic cylinder (41) fixedly connected to the upper middle part of the operating table (1). A push plate (42) is fixedly connected to the output end of the hydraulic cylinder (41). A laser drilling head (43) is fixedly connected to the lower middle part of the push plate (42). A rack (44) is fixedly connected to the right side of the laser drilling head (43). The rear side of the push plate (42) is fixedly connected to the upper end of the nozzle (54).

3. The laser drilling device for HDI circuit boards according to claim 2, characterized in that: The rotating mechanism (3) includes a gear (32) that can mesh with the rear end of the rack (44). A first rotating roller (31) is fixedly connected to the inner surface of the gear (32). A second rotating roller (33) is drivenly connected to the left side of the outer surface of the first rotating roller (31). A circular plate (34) is fixedly connected to the lower part of the outer surface of the second rotating roller (33). A soft brush (35) is fixedly connected to the upper part of the outer surface of the second rotating roller (33).

4. The laser drilling device for HDI circuit boards according to claim 3, characterized in that: A baffle (341) is fixedly connected to the rear side of the upper end of the circular plate (34), and the second rotating roller (33) is rotatably connected to the upper end of the operating table (1).

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