PCB multilayer circuit board drilling device

Abstract

The invention relates to the technical field of PCB processing, and discloses a PCB multilayer circuit board drilling device which comprises a production line, a clamping mechanism and a drilling mechanism, the production line is composed of a feeding line and a discharging line, the clamping mechanism is arranged between the feeding line and the discharging line, and the drilling mechanism is arranged on the side, corresponding to the clamping mechanism, above the production line. The clamping and fixing mechanism can position the center of the PCB multilayer circuit board and can tightly press aluminum plates on the two sides of the circuit board from top to bottom. The feeding line and the discharging line are directly connected with a production line of the PCB multilayer circuit board, a substrate of the PCB multilayer circuit board can be directly transferred to one side of the feeding line after being coated with copper foil, aluminum plates are padded on the upper side and the lower side of the PCB multilayer circuit board, the circuit board padded with the aluminum plates is forwards conveyed to one side of the clamping mechanism, and the aluminum plates are conveyed to the other side of the clamping mechanism. The PCB multi-layer circuit board can be centered and positioned through the clamping and fixing assembly in the clamping and fixing mechanism, an aluminum plate is pressed from top to bottom, and the clamping and fixing mechanism, the centering mechanism and the blocking mechanism are used in cooperation so that the circuit board can be accurately positioned on a machining position.

Description

Technical Field

[0001] The present invention relates to the technical field of PCB circuit board processing, in particular to a PCB multi-layer circuit board drilling device. Background Art

[0002] Circuit boards are classified into three major categories according to the number of layers: single-sided boards, double-sided boards and multi-layer circuit boards. Multi-layer circuit boards refer to boards with more than three conductive graphic layers and insulating materials laminated between them. Multi-layer circuit boards are the product of the development of electronic information technology towards high speed, multi-function, large capacity, small size, thinness and lightweight. Multi-layer circuit boards need to be drilled during production and processing to meet usage requirements.

[0003] Before drilling holes in a multi-layer circuit board, aluminum plates need to be placed on both the upper and lower sides of the circuit board. The aluminum plates protect the copper foil on the circuit board and prevent the drill bit from directly drilling on the copper foil and tearing and damaging the copper foil. Secondly, aluminum has good thermal conductivity, which can facilitate heat dissipation at the drilling site and protect the drill bit. In the existing technology, workers transfer the multi-layer PCB circuit board with aluminum plates on both sides to a drilling platform, then stick tape on the outer periphery of the aluminum plate, fix the aluminum plate and the circuit board on the platform, and then drill. After the drilling is completed, the tape is torn off and the circuit board is removed for transportation. This fixing method is relatively inconvenient, and both fixing and disassembly are relatively troublesome, which affects processing efficiency. In addition, it is difficult to ensure that each circuit board is accurately positioned when manually transferring the circuit board to the drilling platform. It is difficult to ensure drilling accuracy when drilling circuit boards with inaccurate positioning. Summary of the Invention

[0004] The purpose of the present invention is to provide a PCB multi-layer circuit board drilling device to solve the problems raised in the above background technology that the circuit board is not accurately positioned, which affects the drilling accuracy, and the fixing and disassembly of the circuit board and the aluminum plate are relatively troublesome.

[0005] To achieve the above object, the present invention provides the following technical solutions: A PCB multi-layer circuit board drilling device includes a production line, a clamping mechanism and a drilling mechanism. The production line is composed of a loading line and a unloading line. The clamping mechanism is arranged between the loading line and the unloading line. The drilling mechanism is arranged above the production line on a side corresponding to the clamping mechanism. The clamping mechanism can position the center of the PCB multi-layer circuit board and can press the aluminum plates on both sides of the circuit board from top to bottom. The drilling mechanism is used to drill holes in the PCB multi-layer circuit board and can drill holes of different diameters according to processing requirements. A centering mechanism is provided between the loading line and the clamping mechanism. A blocking mechanism is provided between the unloading line and the clamping mechanism. The centering mechanism is used to center the PCB multi-layer circuit board on the loading line to facilitate the transfer of the circuit board to one side of the clamping mechanism. The blocking mechanism is used to block the PCB multi-layer circuit board from the front end and keep it on the clamping mechanism. The centering mechanism and the blocking mechanism cooperate with each other to center the PCB multi-layer circuit board on the clamping mechanism.

[0006] As a further solution of the present invention: the clamping mechanism includes two relatively arranged rails, a bracket is provided between the two rails, the two ends of the two rails are respectively connected and fixed to the brackets on the front and rear sides of the production line, a clamping assembly is provided below the two rails, a plurality of guide brackets are provided on the periphery of the clamping assembly, a plurality of guide wheels are rotatably connected to the top of the rails at equal intervals, guide grooves are provided on the front and rear sides of the bracket, the guide grooves and the guide wheels correspond to each other, and the plurality of guide wheels located on the same side are rollingly connected to the guide grooves on the corresponding side, and the bracket is slidably limited between the two rails through the cooperation of the guide grooves and the guide wheels.

[0007] As a further solution of the present invention: a plurality of conveying rollers are rotatably connected at equal intervals on the side of the track facing the bracket, and the plurality of conveying rollers located on the same side are all fittedly arranged below the corresponding side edge of the bracket, a cavity is provided inside the track, one end of the rotating shafts of the plurality of conveying rollers are inserted into the cavity, and the rotating shafts of the plurality of conveying rollers are connected by a belt drive structure, a first motor is installed on one side outside the track, and one end of the output shaft of the first motor is fixedly connected to one end of the rotating shaft of one of the plurality of conveying rollers.

[0008] As a further solution of the present invention: the clamping assembly includes a lifting cylinder, a support frame and a cross bracket, the support frame is connected to the output end of the lifting cylinder, the cross bracket is fixed above the support frame, and guide seats are fixed on the four sides of the inner side of the support frame. Multiple guide seats are provided with a first inclined surface on one side facing the center of the support frame, and the first inclined surface is inclined from top to bottom toward the side close to the center of the support frame.

[0009] The two cams are connected to each other by a plurality of first and second connecting rods, and the two cams are connected to each other by a plurality of second connecting rods at the two ends of the first and second connecting rods respectively.

[0010] As a further solution of the present invention: a first sliding groove and a second sliding groove are respectively provided on the top and the bottom inner wall of the cross bracket, a first slider and a second slider are respectively fixed to the bottom of the first slide plate and the top of the second slide plate, the first slider is slidably connected in the first sliding groove, the second slider is slidably connected in the second sliding groove, a first screw rod is rotatably connected in the first sliding groove, the two ends of the first screw rod are symmetrically provided with reverse threads, the two ends of the first screw rod are respectively threadedly connected to the first slider on the corresponding side, a second motor is installed on the side of the outside of the cross bracket corresponding to the first screw rod, and one end of the output shaft of the second motor is fixedly connected to one end of the first screw rod.

[0011] The top of the slide is provided with a third slider, the third slider is slidably connected to the third slider, and the third slider is threadably sleeved on the third slider. A fourth motor is embedded in the slide at one side of the slide, and one end of the output shaft of the fourth motor is fixedly connected to one end of the second slider.

[0012] As a further solution of the present invention: a rotating table is rotatably connected at the center of the bottom of the mounting table, and a fifth motor is embedded in the interior of the mounting table, and one end of the fifth motor output shaft is fixedly connected to one end of the rotating shaft of the rotating table. A first electric push rod is installed at the center of the bottom of the rotating table, and a round table is fixed at the end of the movable end of the first electric push rod, and a plurality of limit rods are evenly arranged between the round table and the rotating table, and one end of the plurality of limit rods slides through the bottom of the round table, and the bottom ends of the plurality of limit rods are provided with limit blocks for preventing the limit rods from slipping off the round table, and a plurality of second electric push rods are installed around the bottom of the round table at equal intervals, and a drilling motor is installed at the end of the movable ends of the plurality of second electric push rods, and a drill bit is fixed at one end of the output shaft of the plurality of drilling motors, and the sizes of the plurality of drill bits are different and can be used to drill holes of different diameters.

[0013] As a further solution of the present invention: the centering mechanism includes two relatively arranged pushing cylinders, which are respectively fixed on the front and rear sides of the feeding line close to one end of the clamping mechanism. The output ends of the two pushing cylinders are fixed with positioning blocks, and the two positioning blocks can be moved horizontally toward the center side above the feeding line. The front and rear positioning blocks cooperate with each other to push the PCB multi-layer circuit board on the feeding line toward the middle and make it located in the middle position above the feeding line, so as to facilitate the transfer of the PCB multi-layer circuit board from the feeding line to the side of the clamping mechanism.

[0014] As a further solution of the present invention: the blocking mechanism includes a blocking bar and a lifting cylinder, the blocking bar is connected and fixed to the output end of the lifting cylinder, the lifting cylinder is fixed below the unloading line near one end of the clamping mechanism, and the blocking bar can be raised upward and can be kept flush with the upper end surface of the PCB multi-layer circuit board.

[0015] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, a loading line and an unloading line are provided, and the loading line and the unloading line are directly connected to the production line of the PCB multi-layer circuit board. After being coated with copper foil, the substrate of the PCB multi-layer circuit board can be directly transferred to one side of the loading line. Aluminum plates are placed on the upper and lower sides of the PCB multi-layer circuit board, and the circuit board padded with the aluminum plates is conveyed forward to one side of the clamping mechanism. The clamping assembly in the clamping mechanism can center the PCB multi-layer circuit board and press the aluminum plates from top to bottom. In the prior art, the aluminum plates and circuit boards are fixed to the table with tape, which is time-consuming and labor-intensive. However, the provided clamping mechanism can quickly position and press the PCB multi-layer circuit board and the aluminum plates, and the materials can be quickly removed after processing is completed by simply driving the clamping assembly in reverse. Compared with the existing fixing method, this is faster and more efficient. Furthermore, during the drilling process, holes of different diameters can be processed as needed. In the prior art, when processing different types of holes, the circuit board generally needs to be transferred to other drilling platforms. However, the present device is provided with a switchable drill bit, which can be switched as needed during drilling, making it convenient to process holes of different diameters at the same processing position without manual secondary transfer, saving time and labor and improving efficiency. Furthermore, a centering mechanism is set between the loading line and the clamping mechanism, and a blocking mechanism is set between the unloading line and the clamping mechanism. The centering mechanism, the blocking mechanism and the clamping mechanism are used in combination to accurately position the PCB multi-layer circuit board at the processing position. The circuit board is accurately positioned, the drilling accuracy will be higher, and the product quality will be better. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a structural schematic diagram of the present invention.

[0018] Figure 2 Schematic diagram of the connection between the clamping mechanism and the production line in the present invention.

[0019] Figure 3 It is a structural schematic diagram of the blocking mechanism in the present invention.

[0020] Figure 4 It is a structural schematic diagram of the clamping mechanism in the present invention.

[0021] Figure 5 This is a structural separation diagram of the clamping mechanism in the present invention.

[0022] Figure 6 Schematic diagram of the internal structure of the track in the clamping mechanism.

[0023] Figure 7 This is a structural separation diagram of the clamping components in the clamping mechanism.

[0024] Figure 8 This is a first-perspective view of the cross bracket in the clamping assembly.

[0025] Figure 9 A second perspective view of the cross bracket in the clamping assembly.

[0026] Figure 10 This is a first perspective view of the drilling mechanism in the present invention.

[0027] Figure 11 This is a second perspective view of the drilling mechanism in the present invention.

[0028] Figure 12 This is a structural diagram of the slide in the drilling mechanism.

[0029] Figure 13 Schematic diagram of the internal structure of the slide in the drilling mechanism.

[0030] Figure marking notes: 1-feeding line, 2-unloading line, 3-clamping mechanism, 31-track, 311-guide wheel, 312-conveying roller, 313-first motor, 314-belt transmission structure, 32-bracket, 321-guide groove, 33-guide bracket, 34-clamping assembly, 341-lifting cylinder, 342-support frame, 343-guide seat, 344-first inclined plane, 345-cross bracket, 346-first slide, 347-second slide, 348-connecting rod, 349-first connecting part, 3410-second connecting part, 3411-positioning rod, 3412-pressing block, 3413-first slide groove, 3414-second motor, 3415-first screw rod , 3416-first slider, 3417-second slider, 3418-second slide, 3419-guide block, 3420-second inclined plane, 4-drilling mechanism, 41-frame, 42-mounting frame, 43-slide, 44-guide rod, 45-second screw rod, 46-third motor, 47-third slide, 48-third screw rod, 49-mounting table, 410-third slider, 411-rotating table, 412-first electric push rod, 413-limiting rod, 414-round table, 415-second electric push rod, 416-drilling motor, 417-drill bit, 418-fourth motor, 419-fifth motor, 5-pushing cylinder, 6-positioning block, 7-blocking bar, 8-lifting cylinder. DETAILED DESCRIPTION

[0031] The following embodiments will be described in detail with reference to the accompanying drawings. Similar or identical parts are denoted by the same reference numerals in the drawings or description. In actual applications, the shape, thickness, or height of each component may be enlarged or reduced. The various embodiments listed in the present invention are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. Any obvious modifications or changes made to the present invention do not depart from the spirit and scope of the present invention.

[0032] See also Figures 1 to 13In an embodiment of the present invention, a PCB multi-layer circuit board drilling device includes a production line, a clamping mechanism 3 and a drilling mechanism 4. The production line is composed of a loading line 1 and a unloading line 2. The loading line 1 and the unloading line 2 are both existing conveying lines for conveying materials. The clamping mechanism 3 is arranged between the loading line 1 and the unloading line 2. The drilling mechanism 4 is arranged on one side of the production line corresponding to the clamping mechanism 3. The loading line 1 feeds the PCB multi-layer circuit board into the clamping mechanism 3 for clamping and positioning, and then the circuit board is drilled by the drilling mechanism 4. After the drilling is completed, the PCB multi-layer circuit board is conveyed outward by the unloading line 2. When drilling the PCB multi-layer circuit board, aluminum plates are placed on both sides thereof. The clamping mechanism 3 can position the center of the PCB multi-layer circuit board and can press the circuit board from top to bottom so that the aluminum plates on the upper and lower sides are tightly attached to the circuit board. The drilling mechanism 4 is used to drill holes in the PCB multi-layer circuit board and can drill holes of different diameters according to processing requirements. A centering mechanism is provided between the feeding line 1 and the clamping mechanism 3. The centering mechanism includes two oppositely arranged pushing cylinders 5. The two pushing cylinders 5 are respectively fixed on the front and rear sides of one end of the feeding line 1 close to the clamping mechanism 3. Positioning blocks 6 are fixed to the output ends of the two pushing cylinders 5. Both positioning blocks 6 can be moved horizontally toward the center side above the feeding line 1. The front and rear positioning blocks 6 cooperate with each other to push the PCB multi-layer circuit board on the feeding line 1 toward the middle, so that it is located in the middle position of the feeding line 1, thereby facilitating the transfer of the PCB multi-layer circuit board from the feeding line 1 to the side of the clamping mechanism 3. A blocking mechanism is provided between the unloading line 2 and the clamping mechanism 3. The blocking mechanism includes a blocking bar 7 and a lifting cylinder 8. The blocking bar 7 is connected and fixed to the output end of the lifting cylinder 8. The lifting cylinder 8 is fixed below the end of the unloading line 2 close to the clamping mechanism 3. The blocking bar 7 is lifted upward by the lifting cylinder 8 so that the blocking bar 7 is higher than the unloading line 2. The upper end surface of the blocking bar 7 is flush with the upper end surface of the PCB multi-layer circuit board. When the front end of the circuit board reaches the side of the blocking bar 7, it will be blocked, so that the PCB multi-layer circuit board can be stopped on the clamping mechanism 3 to prevent it from continuing to move forward due to inertia of movement, so that the PCB multi-layer circuit board can be accurately positioned on the clamping mechanism 3.

[0033] See also Figures 4-6 The clamping mechanism 3 includes two rails 31 arranged opposite to each other, a bracket 32 ​​is provided between the two rails 31, and the multi-layer PCB circuit board is placed on the bracket 32. The bracket 32 ​​is transported forward along the production line. The two ends of the two rails 31 are respectively connected and fixed to the brackets on the front and rear sides of the production line. A clamping component 34 is provided below between the two rails 31, and a plurality of guide brackets 33 are provided on the periphery of the clamping component 34. A plurality of guide wheels 311 are rotatably connected at equal intervals on the top of the track 31. Guide grooves 321 are provided on both the front and rear sides of the bracket 32. The guide grooves 321 and the guide wheels 311 correspond to each other. The guide wheels 311 on the same side are rotatably connected in the guide grooves 321 on the corresponding side. The bracket 32 ​​is slidably limited between the two tracks 31 by the cooperation of the guide grooves 321 and the guide wheels 311. Then, the bracket 32 ​​is positioned on the clamping mechanism 3 in advance with the cooperation of the centering mechanism and the blocking mechanism, so as to facilitate the subsequent positioning of the multi-layer PCB circuit board. The side of the track 31 facing the bracket 32 ​​is rotatably connected with multiple conveying rollers 312 at equal intervals. The multiple conveying rollers 312 located on the same side are all fitted under the corresponding side of the bracket 32. When the conveying rollers 312 rotate, they can drive the bracket 32 ​​to continue conveying forward. To ensure that there is no slipping during conveying, a rubber anti-slip pad can be set on the surface of the conveying rollers 312. A cavity is set inside the track 31, and one end of the rotating shaft of the multiple conveying rollers 312 is inserted into the cavity, and the rotating shafts of the multiple conveying rollers 312 are connected by a belt transmission structure 314. A first motor 313 is installed on one side of the outside of the track 31, and one end of the output shaft of the first motor 313 is fixedly connected to one end of the rotating shaft of one of the multiple conveying rollers 312. The cooperation of the first motor 313 and the belt transmission structure 314 drives the multiple conveying rollers 312 to rotate, thereby driving the bracket 32 ​​to convey forward.

[0034] See also Figures 7-9 The clamping assembly 34 includes a lifting cylinder 341, a support frame 342 and a cross bracket 345. The support frame 342 is connected to the output end of the lifting cylinder 341, and the cross bracket 345 is fixed above the support frame 342. The lifting cylinder 341 can drive the support frame 342 and the cross bracket 345 to move upward synchronously. In order to ensure stability during lifting, four guide brackets 33 are set on the outside of the support frame 342. The four corners of the support frame 342 are slidably engaged in the corresponding guide brackets 33 respectively; Guide seats 343 are fixed to the four inner sides of the support frame 342. A first inclined surface 344 is formed on each side of the guide seats 343 facing the center of the support frame 342. The first inclined surface 344 is inclined from top to bottom toward the side close to the center of the support frame 342. A first slide 346 is slidably connected to the front and rear sides of the top of the cross bracket 345, and a second slide 347 is slidably connected to the left and right sides of the bottom of the cross bracket 345. A connecting rod 348 is provided between the first slide 346 and the second slides 347 on both sides. The two ends of the connecting rod 348 are rotatably connected to the first slide 346 and the second slide 347 respectively. Two first connecting parts 349 are symmetrically provided on the side of the first slide 346 facing the center of the cross bracket 345. The first connecting part 349 and the first slide 346 are formed integrally. Two second connecting parts 3410 are symmetrically provided on the side of the second slide 347 facing the center of the cross bracket 345. The second connecting parts 3410 and the second slide 347 are formed integrally. A plurality of first connecting parts 349 and a plurality of second connecting parts 3410 are slidably connected with positioning rods 3411. The lower ends of the positioning rods 3411 are sleeved and fixed with guide blocks 3419. The guide blocks 3419 are slidably connected to the corresponding guide seats 343. A second inclined surface 3420 is provided on a side of the guide block 3419 away from the center of the support frame 342. The second inclined surface 3420 is inclined from bottom to top toward the side away from the center of the support frame 342. The second inclined surface 3420 is correspondingly arranged and used in conjunction with the first inclined surface 344 to drive the rod body to slide downward synchronously when the positioning rods 3411 move inward. A pressing block 3412 is provided at the top of the positioning rod 3411. When the multiple positioning rods 3411 move inward, they close together to form a central positioning space. The rod body of the positioning rod 3411 squeezes the side of the multi-layer PCB circuit board, limiting the multi-layer PCB circuit board in this central space. At the same time, the positioning rod 3411 slides downward under the cooperation of the guide seat 343 and the guide block 3419, driving the pressing block 3412 to move downward until it contacts the aluminum plate on the upper side of the multi-layer PCB circuit board, pressing the aluminum plate against the circuit board so that the two are tightly fitted together. After the aluminum plate and the circuit board are tightly fixed, drilling of the circuit board is facilitated, and the copper foil on the circuit board can be prevented from being torn and damaged by the drill bit. A first sliding groove 3413 and a second sliding groove 3418 are respectively formed on the top and bottom inner walls of the cross bracket 345. A first slider 3416 and a second slider 3417 are respectively fixed to the bottom of the first slide 346 and the top of the second slide 347. The first slider 3416 is slidably connected to the first sliding groove 3413, and the second slider 3417 is slidably connected to the second sliding groove 3418. A first screw rod 3415 is rotatably connected to the first sliding groove 3413. The two ends of the first screw rod 3415 are symmetrically provided with oppositely directed threads. The two ends of the first screw rod 3415 are respectively threadedly connected to the first slider 3416 on the corresponding side. A second motor 3414 is installed on the side of the cross bracket 345 corresponding to the first screw rod 3415. One end of the output shaft of the second motor 3414 is fixedly connected to one end of the first screw rod 3415. The first screw rod 3415 is rotated by the second motor 3414, and the first screw rod 3415 is threadedly engaged with the first slider 3416, driving the first slider 3416 to slide in the first slide groove 3413. When the first slider 3416 slides inward, the two first sliders 346 move inward synchronously, and the second sliders 347 located on both sides of the first slider 346 will also move inward synchronously under the action of the connecting rod 348. When the first slider 346 and the second slider 347 both move inward, the multiple positioning rods 3411 located on one side of the slider will also move inward synchronously, so that the PCB multi-layer circuit board can be squeezed and positioned.

[0035] See also Figures 10-13 The drilling mechanism 4 includes a frame 41, a mounting frame 42 is fixed to the top of the frame 41, and the mounting frame 42 is a frame-type structure, and a slide 43 is slidably connected therein. A second screw rod 45 is rotatably connected to the middle position inside the mounting frame 42, and the second screw rod 45 is threadedly connected to the slide 43. Guide rods 44 are fixed on both sides of the mounting frame 42, and the two guide rods 44 are slidably connected to the slide 43. A third motor 46 is installed on one side of the outside of the mounting frame 42, and one end of the output shaft of the third motor 46 is fixedly connected to one end of the second screw rod 45; A third chute 47 is provided in the middle of the bottom of the slide 43. A third screw rod 48 is rotatably connected in the third chute 47. A mounting platform 49 is slidably connected to the bottom of the slide 43. A third slider 410 is integrally formed on the top of the mounting platform 49. The third slider 410 is slidably connected to the third chute 47 and is threadedly sleeved on the third screw rod 48. A fourth motor 418 is embedded and installed on one side of the interior of the slide 43. One end of the output shaft of the fourth motor 418 is fixedly connected to one end of the third screw rod 48. A rotating table 411 is rotatably connected at the center of the bottom of the mounting table 49, and a fifth motor 419 is embedded and installed inside the mounting table 49. One end of the output shaft of the fifth motor 419 is fixedly connected to one end of the rotating shaft of the rotating table 411. A first electric push rod 412 is installed at the center of the bottom of the rotating table 411. A round table 414 is fixed to the end of the movable end of the first electric push rod 412. A plurality of limiting rods 413 are evenly arranged between the round table 414 and the rotating table 411. One end of each of the limiting rods 413 slides through the bottom of the round table 414, and a limiting block is provided at the bottom end of each of the limiting rods 413 to prevent the limiting rods 413 from slipping off the round table 414. A plurality of second electric push rods 415 are installed at equal intervals around the bottom of the frustum 414, and a drilling motor 416 is installed at the end of the movable end of the plurality of second electric push rods 415. A drill bit 417 is fixed at one end of the output shaft of the plurality of drilling motors 416. The sizes of the plurality of drill bits 417 are different and can be used to drill holes of different diameters.

[0036] Working principle: The processing flow of PCB multilayer circuit board is to first cover the copper foil on the substrate, and then stack and fix multiple copper foil-covered substrates together. Before drilling, aluminum plates need to be padded on both the upper and lower sides of the PCB multilayer circuit board. The PCB multilayer circuit board padded with aluminum plates on both the upper and lower sides is placed on the bracket 32 ​​and transported to the side of the clamping mechanism 3 along the feeding line 1. The circuit board is pressed and fixed on the bracket 32 ​​by the clamping component 34 in the clamping mechanism 3. The multiple positioning rods 3411 in the clamping component 34 are closed from the outside to the inside, gradually pressing against the corresponding On the side, squeeze and move the circuit board to the center above the bracket 32. At the same time, the positioning rod 3411 will slide downward under the joint action of the guide seat 343 and the guide block 3419. When the positioning rod 3411 slides downward, it will drive the pressure block 3412 on its top to move downward synchronously. When the pressure block 3412 moves downward, it will press the aluminum plate on the upper side of the circuit board from top to bottom, so that the aluminum plates on the upper and lower sides of the circuit board can be pressed tightly against the circuit board. Drilling can only be carried out after the aluminum plates and the circuit board are tightly attached. Otherwise, the copper foil on the circuit board will be torn and damaged by the drill bit. After the aluminum plate and the circuit board are fixed, the drilling work is carried out through the drilling mechanism 4. The drill bit 417 can be moved in the Y-axis direction by the cooperation of the third motor 46 and the second screw 45, etc., the drill bit 417 can be moved in the X-axis direction by the cooperation of the fourth motor 418 and the third screw 48, etc., and the drill bit 417 can be moved in the Z-axis direction by the cooperation of the first electric push rod 412 and the second electric push rod 415. When holes of different diameters need to be drilled, the corresponding drill bit 417 located below the round table 414 can be rotated by the fifth motor 419. Turn to the processing hole position and drill. After drilling is completed, the clamping assembly 34 is driven in the reverse direction to release the restriction on the circuit board. At the same time, the first motor 313 is started to rotate the conveying roller 312. Driven by the conveying roller 312 and guided by the guide wheel 311, the bracket 32 ​​is conveyed forward to the side of the unloading line 2. The processed PCB multi-layer circuit board is conveyed outward through the unloading line 2. Both the loading line 1 and the unloading line 2 can be connected to the existing PCB multi-layer circuit board production line, and the circuit boards on the production line can be directly transferred to this device for drilling processing. There is no need for manual secondary transfer, which improves processing efficiency.

[0037] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0038] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A PCB multi-layer circuit board drilling device, comprising a production line, a clamping mechanism (3) and a drilling mechanism (4), characterized in that: The production line is composed of a feeding line (1) and a feeding line (2), the clamping mechanism (3) is arranged between the feeding line (1) and the feeding line (2), the drilling mechanism (4) is arranged above the production line on a side corresponding to the clamping mechanism (3), the clamping mechanism (3) can position the center of the PCB multi-layer circuit board and can press the aluminum plates on both sides of the circuit board from top to bottom, the drilling mechanism (4) is used to drill holes in the PCB multi-layer circuit board and can drill holes of different diameters according to processing requirements, the feeding line (1) and the A centering mechanism is provided between the clamping mechanisms (3), and a blocking mechanism is provided between the unloading line (2) and the clamping mechanism (3). The centering mechanism is used to center the PCB multilayer circuit board on the loading line (1) so as to facilitate the transfer of the circuit board to one side of the clamping mechanism (3). The blocking mechanism is used to block the PCB multilayer circuit board from the front end and keep it on the clamping mechanism (3). The centering mechanism and the blocking mechanism cooperate with each other to center the PCB multilayer circuit board on the clamping mechanism (3).

2. The PCB multi-layer circuit board drilling device according to claim 1, characterized in that: The clamping mechanism (3) includes two rails (31) arranged opposite to each other, a bracket (32) is arranged between the two rails (31), the two ends of the two rails (31) are respectively connected and fixed to the brackets on the front and rear sides of the production line, a clamping assembly (34) is arranged below the two rails (31), a plurality of guide brackets (33) are arranged on the periphery of the clamping assembly (34), a plurality of guide wheels (311) are rotatably connected to the top of the rails (31) at equal intervals, and guide grooves (321) are provided on both the front and rear sides of the bracket (32), the guide grooves (321) and the guide wheels (311) are positioned corresponding to each other, and the plurality of guide wheels (311) located on the same side are rollingly connected to the guide grooves (321) on the corresponding side, and the bracket (32) is slidably limited between the two rails (31) by the cooperation of the guide grooves (321) and the guide wheels (311).

3. The PCB multi-layer circuit board drilling device according to claim 2, characterized in that: A plurality of conveying rollers (312) are rotatably connected at equal intervals on one side of the track (31) facing the bracket (32). The plurality of conveying rollers (312) located on the same side are all arranged below the corresponding side edge of the bracket (32). A cavity is provided inside the track (31), and one end of the rotating shaft of the plurality of conveying rollers (312) is inserted into the cavity. The rotating shafts of the plurality of conveying rollers (312) are connected via a belt transmission structure (314). A first motor (313) is installed on one side outside the track (31), and one end of the output shaft of the first motor (313) is fixedly connected to one end of the rotating shaft of one of the plurality of conveying rollers (312).

4. The PCB multi-layer circuit board drilling device according to claim 3, characterized in that: The clamping assembly (34) includes a lifting cylinder (341), a support frame (342) and a cross bracket (345), wherein the support frame (342) is connected to the output end of the lifting cylinder (341), and the cross bracket (345) is fixed above the support frame (342). Guide seats (343) are fixed on the four inner sides of the support frame (342), and a first inclined surface (344) is provided on one side of the guide seats (343) facing the center of the support frame (342), and the first inclined surface (344) is inclined from top to bottom toward the side close to the center of the support frame (342).

5. The PCB multi-layer circuit board drilling device according to claim 4, characterized in that: The front and rear sides of the top of the cross bracket (345) are slidably connected to the first slide plate (346), and the left and right sides of the bottom of the cross bracket (345) are slidably connected to the second slide plate (347). A connecting rod (348) is provided between the first slide plate (346) and the second slide plates (347) on both sides. The two ends of the connecting rod (348) are rotatably connected to the first slide plate (346) and the second slide plate (347). Two first connecting parts (349) are symmetrically provided on one side of the first slide plate (346) facing the center of the cross bracket (345), and two second connecting parts (3410) are symmetrically provided on one side of the second slide plate (347) facing the center of the cross bracket (345). Multiple first connecting parts (349) and A plurality of second connecting parts (3410) are all slidably connected with positioning rods (3411), a pressure block (3412) is provided at the top end of the positioning rod (3411), a guide block (3419) is fixedly sleeved on the lower end of the positioning rod (3411), and the guide block (3419) is slidably connected to the corresponding guide seat (343), and a second inclined surface (3420) is provided on the side of the guide block (3419) away from the center of the support frame (342), and the second inclined surface (3420) is inclined from bottom to top toward the side away from the center of the support frame (342), and the second inclined surface (3420) is correspondingly arranged and used in conjunction with the first inclined surface (344) to drive the rod body to slide downward synchronously when the positioning rod (3411) moves inward.

6. The PCB multi-layer circuit board drilling device according to claim 5, characterized in that: A first slide groove (3413) and a second slide groove (3418) are respectively provided on the top and the inner wall of the bottom of the cross bracket (345); a first slider (3416) and a second slider (3417) are respectively fixed to the bottom of the first slide plate (346) and the top of the second slide plate (347); the first slider (3416) is slidably connected to the first slide groove (3413); the second slider (3417) is slidably connected to the second slide groove (3418); a first screw rod (3415) is rotatably connected to the first slide groove (3413); opposite threads are symmetrically provided at both ends of the first screw rod (3415); the two ends of the first screw rod (3415) are respectively threadedly connected to the first slider (3416) on the corresponding side; a second motor (3414) is installed on the side of the outside of the cross bracket (345) corresponding to the first screw rod (3415); one end of the output shaft of the second motor (3414) is fixedly connected to one end of the first screw rod (3415).

7. The PCB multi-layer circuit board drilling device according to claim 1, characterized in that: The drilling mechanism (4) includes a frame (41), a mounting frame (42) is fixed to the top of the frame (41), the mounting frame (42) is a frame-type structure, and a slide (43) is slidably connected therein, a second screw (45) is rotatably connected to the middle position inside the mounting frame (42), the second screw (45) is threadedly connected to the slide (43), guide rods (44) are fixed on both sides inside the mounting frame (42), and the two guide rods (44) are slidably connected to the slide (43), and a third motor (46) is installed on one side of the outside of the mounting frame (42), and one end of the output shaft of the third motor (46) is connected to the second screw (45). One end is fixedly connected, a third slide groove (47) is provided in the middle position of the bottom of the slide (43), a third screw rod (48) is rotatably connected in the third slide groove (47), the bottom of the slide (43) is slidably connected to the mounting platform (49), the top of the mounting platform (49) is integrally formed with a third slider (410), the third slider (410) is slidably connected in the third slide groove (47), and the third slider (410) is threadedly sleeved on the third screw rod (48), a fourth motor (418) is embedded and installed on one side of the interior of the slide (43), and one end of the output shaft of the fourth motor (418) is fixedly connected to one end of the third screw rod (48).

8. The PCB multi-layer circuit board drilling device according to claim 7, characterized in that: The center of the bottom of the mounting platform (49) is rotatably connected to a rotating platform (411), a fifth motor (419) is embedded and installed inside the mounting platform (49), one end of the output shaft of the fifth motor (419) is fixedly connected to one end of the rotating shaft of the rotating platform (411), a first electric push rod (412) is installed at the center of the bottom of the rotating platform (411), a round platform (414) is fixed to the end of the movable end of the first electric push rod (412), a plurality of limiting rods (413) are evenly arranged between the round platform (414) and the rotating platform (411), and the plurality of limiting rods (413) are fixed to the rotating platform (411). 3) are slid through one end of the truncated table (414), and the bottom ends of the plurality of limit rods (413) are provided with limit blocks for preventing the limit rods (413) from slipping off the truncated table (414), a plurality of second electric push rods (415) are installed around the bottom of the truncated table (414) at equal intervals, and the ends of the movable ends of the plurality of second electric push rods (415) are all installed with drilling motors (416), and one end of the output shaft of the plurality of drilling motors (416) is fixed with a drill bit (417), and the sizes of the plurality of drill bits (417) are different and can be used to drill holes of different diameters.

9. The PCB multi-layer circuit board drilling device according to claim 1, characterized in that: The centering mechanism comprises two oppositely arranged pushing cylinders (5), the two pushing cylinders (5) being fixed respectively on the front and rear sides of the feeding line (1) near one end of the clamping mechanism (3), and the output ends of the two pushing cylinders (5) being fixed with positioning blocks (6), both of which can be moved horizontally toward the center side above the feeding line (1), and the front and rear positioning blocks (6) cooperate with each other to push the PCB multi-layer circuit board located on the feeding line (1) toward the middle and make it located in the middle position above the feeding line (1), thereby facilitating the transfer of the PCB multi-layer circuit board from the feeding line (1) to the side of the clamping mechanism (3).

10. The PCB multi-layer circuit board drilling device according to claim 1, characterized in that: The blocking mechanism comprises a blocking bar (7) and a lifting cylinder (8), wherein the blocking bar (7) is connected and fixed to the output end of the lifting cylinder (8), and the lifting cylinder (8) is fixed below one end of the blanking line (2) close to the clamping mechanism (3), and the blocking bar (7) can be raised upward and can be kept flush with the upper end surface of the PCB multilayer circuit board.

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