Multi-layer circuit board drilling machine

Abstract

The invention relates to the field of circuit board processing, in particular to a multilayer circuit board drilling machine which comprises a workbench, a fixing frame, an electric drive moving block, an electric telescopic rod, a drilling machine, a base plate, a motor, a rotating rod and the like. The workbench is fixedly connected with a fixing frame. The fixing frame is slidably connected with an electric drive moving block. The electric driving moving block is fixedly connected with an electric telescopic rod; drilling machines are mounted on telescopic parts of the electric telescopic rods; the surface of the workbench is fixedly connected with a backing plate; the workbench is fixedly connected with a motor; the workbench is rotationally connected with a rotating rod. The aluminum sheet cover plate is moved from front to back between the protective film and the placing rollers and is placed between the placing grooves of the two placing rollers, and the aluminum sheet cover plate is attached and limited through the protective film in the placing process, so that the situation that the aluminum sheet cover plate is bent and deformed in the placing process of the aluminum sheet cover plate is prevented, and the aluminum sheet cover plate is convenient to place.

Description

Technical Field

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

[0002] A multilayer circuit board is a printed circuit board composed of multiple single-layer circuit boards through lamination technology. It is suitable for realizing more complex circuit designs in a smaller space.

[0003] The manufacture of multi-layer circuit boards requires multiple processing steps such as drilling and copper plating. During the drilling process, a layer of aluminum sheet is usually placed on top of the circuit board to improve hole position accuracy, improve hole wall quality, extend drill bit life, reduce needle breakage rate, and also play a role in cooling. In the existing pre-drilling process, the aluminum sheet is usually manually placed on the surface of the circuit board and fixed with tape before the drilling operation is performed. However, since the aluminum sheet is a large and thin sheet material, it is prone to bending and deformation, making manual operation very difficult. In addition, in subsequent processes, it is necessary to manually remove the tape and clean up the residue. This process is not only time-consuming and labor-intensive, but also significantly affects the overall processing efficiency of the circuit board.

[0004] In summary, this application proposes a multi-layer circuit board drilling machine to improve the technical problems mentioned above. Summary of the Invention

[0005] In order to overcome the disadvantage that manually placing larger and thinner aluminum sheets is very difficult, which is not only time-consuming and labor-intensive but also affects the processing efficiency of the entire circuit board, the present invention provides a multi-layer circuit board drilling machine.

[0006] Technical solution: A multi-layer circuit board drilling machine includes a workbench, a fixed frame, an electric drive moving block, an electric telescopic rod, a drilling rig and a pad; the workbench is fixedly connected to the fixed frame; the fixed frame is slidably connected to the electric drive moving block; the electric drive moving block is fixedly connected to the electric telescopic rod; the telescopic part of the electric telescopic rod is equipped with a drilling rig; the workbench surface is fixedly connected to the pad; it also includes a motor, a rotating rod, a rotating frame, an electric push rod, an installation roller, a protective film, an electric clamping plate, a fixed plate and a placement roller; the workbench is fixedly connected to the motor; the workbench is rotatably connected to the rotating rod, and the rotating rod and the motor The output end is fixed; the rotating rod is fixed to the rotating frame; several electric push rods are fixed to the upper and lower sides of the rotating frame; all the electric push rods on the same side are fixed to a mounting roller; the two mounting rollers are fixed to a protective film; two electric splints are installed on the upper and lower sides of the rotating frame; each electric splint clamps a fixed plate; the two fixed plates on the same side are connected to a placement roller for placing the aluminum sheet cover, and the placement roller is set as an electric roller, the placement roller has a placement groove, and the placement groove is provided with an electric suction cup.

[0007] Furthermore, it also includes a plug-in board; the workbench is fixed with a plurality of plug-in boards, and each fixed board has a slot.

[0008] Furthermore, it also includes a suction pipe; the drilling rig is connected to the suction pipe, and the suction pipe is connected to an external suction mechanism; a suction port is opened on the lower side of the drilling rig, and the suction port is connected to the suction pipe.

[0009] Furthermore, a limiting ring is provided at the rear end of the placement roller.

[0010] Furthermore, it also includes an electric push rod 2 and a positioning frame; the workbench is provided with a groove, in which several electric push rods 2 are fixed; all the telescopic parts of the electric push rods 2 are fixedly connected to a positioning frame, and the positioning frame is slidably connected in the groove.

[0011] Furthermore, it also includes an electric push rod three and a pressing plate; two electric push rods three are fixedly connected to the upper side and the lower side of the rotating frame; and all the three telescopic parts of the electric push rods on the same side are fixedly connected to a pressing plate.

[0012] Furthermore, it also includes an electric guide rail, an electric slider, four electric push rods and a leveling rod; the rotating frame is fixedly connected to two electric guide rails; each electric guide rail is slidably connected to a number of electric sliders; each electric slider is fixedly connected to an electric push rod four; every two corresponding four telescopic parts of the electric push rods are jointly fixedly connected to a leveling rod for leveling the supporting protective film, and the leveling rod is located between the rotating frame and the protective film.

[0013] Furthermore, the protective film is detachably connected to the mounting roller.

[0014] Furthermore, it also includes an electric push rod five, a movable plate, a ventilation pipe and an exhaust pipe; the workbench is provided with a suction groove, and the suction groove is located below the pad, and the pad is provided with a through hole; a number of electric push rods five are fixedly connected to the suction groove; all the telescopic parts of the electric push rods five are commonly connected to a movable plate, and the movable plate slides at the through hole of the pad; the workbench is fixedly connected to two ventilation pipes, and the ventilation pipes are connected to the external suction mechanism; each ventilation pipe is connected to an exhaust pipe, and the exhaust pipe is connected to the suction groove.

[0015] Furthermore, the movable plate is composed of two mutually rotating flat plates, and the five telescopic parts of the electric push rod are rotatably connected to the movable plate.

[0016] The beneficial effects are: The aluminum sheet cover is moved from front to back between the protective film and the placement roller and placed between the placement grooves of the two placement rollers. During the placement process, the aluminum sheet cover is fitted and limited by the protective film to prevent the aluminum sheet cover from bending and deformation during the placement process, so as to facilitate the placement of the aluminum sheet cover.

[0017] By rotating the placement roller, the placement groove clamps the placed aluminum cover and the circuit board body and fixes them, which solves the existing problem of using tape to fix them, and then needs to manually remove the tape and clean the residue, thereby improving the overall processing efficiency of the circuit board.

[0018] The aluminum cover is pressed by the leveling rod so that it gradually fits with the circuit board body from the middle to both ends, thereby preventing some gas from remaining between the aluminum cover and the circuit board body during the placement process, making it unable to fully fit and affecting the accuracy of subsequent drilling. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of the multi-layer circuit board drilling machine disclosed in the present invention; Figure 2 This is a schematic structural diagram of the fixed frame, electric drive moving block, electric telescopic rod, drilling machine and suction pipe assembly disclosed in the multi-layer circuit board drilling machine of the present invention; Figure 3 This is a schematic structural diagram of the motor, rotating rod, rotating frame and protective film assembly disclosed in the multi-layer circuit board drilling machine of the present invention; Figure 4 This is a schematic structural diagram of the assembly of a rotating frame, a first electric push rod, a mounting roller, a protective film, a third electric push rod, and a pressing plate disclosed in the multi-layer circuit board drilling machine of the present invention; Figure 5 A schematic structural diagram of the assembly of the mounting roller, protective film, electric clamping plate, fixing plate and placement roller disclosed in the multi-layer circuit board drilling machine of the present invention; Figure 6 A schematic structural diagram of the protective film and placement roller combination disclosed in the multi-layer circuit board drilling machine of the present invention; Figure 7 This is a schematic structural diagram of the electric guide rail, electric slide, electric push rod and leveling rod combination disclosed in the multi-layer circuit board drilling machine of the present invention; Figure 8 This is a diagram showing a state in which the rotating frame disclosed in the multi-layer circuit board drilling machine of the present invention rotates so that the aluminum cover plate is located above the circuit board body; Figure 9 This is a diagram showing the state in which the placement roller disclosed in the multi-layer circuit board drilling machine of the present invention rotates and clamps the aluminum cover plate and the circuit board body; Figure 10 This is a schematic structural diagram of the electric push rod 5 and the movable plate assembly disclosed in the multi-layer circuit board drilling machine of the present invention; Figure 11 This is a cross-sectional view of the workbench disclosed by the multi-layer circuit board drilling machine of the present invention.

[0020] Parts names and serial numbers in the figure: 1- workbench, 2- fixed frame, 3- electric drive moving block, 4- electric telescopic rod, 5- drilling rig, 6- suction pipe, 7- pad, 8- motor, 9- rotating rod, 10- rotating frame, 11- electric push rod 1, 12- mounting roller, 13- protective film, 14- electric splint, 15- fixed plate, 16- placement roller, 17- plug-in board, 101- electric push rod 2, 102- positioning frame, 111-electric push rod three, 112-pressing plate, 121-electric guide rail, 122-electric slider, 123-electric push rod four, 124-leveling rod, 201-electric push rod five, 202-moving plate, 203-ventilation pipe, 204-exhaust pipe, 1001-suction groove, 1601-placing groove, 1602-electric suction cup, 1603-limiting ring, 100-aluminum cover, 200-circuit board body. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0022] Example 1 A multi-layer circuit board drilling machine, referring to Figures 1-11 As shown, it includes a workbench 1, a fixed frame 2, an electric drive moving block 3, an electric telescopic rod 4, a drilling rig 5 and a pad 7; the workbench 1 is fixedly connected to the fixed frame 2; the fixed frame 2 is slidably connected to the electric drive moving block 3; the electric drive moving block 3 is fixedly connected to the electric telescopic rod 4; the drilling rig 5 is installed on the telescopic part of the electric telescopic rod 4; the pad 7 is fixedly connected to the surface of the workbench 1; It also includes a motor 8, a rotating rod 9, a rotating frame 10, an electric push rod 11, a mounting roller 12, a protective film 13, an electric clamping plate 14, a fixed plate 15 and a placement roller 16; the workbench 1 is fixedly connected to the motor 8; the workbench 1 is rotatably connected to the rotating rod 9, and the rotating rod 9 is fixedly connected to the output end of the motor 8; the rotating rod 9 is fixedly connected to the rotating frame 10; two electric push rods 11 are fixedly connected to the upper and lower sides of the rotating frame 10; all the electric push rods 11 on the same side are fixedly connected to a mounting roller 12; the two mounting rollers 12 are fixedly connected to a protective film 1 3; Two electric clamps 14 are installed on the upper and lower sides of the rotating frame 10; each electric clamp 14 clamps a fixed plate 15; the two fixed plates 15 on the same side are connected to a placement roller 16 that rotates together, and the placement roller 16 is configured as a motorized roller, and the placement roller 16 has a placement groove 1601, and the placement groove 1601 is provided with an electric suction cup 1602, which can adsorb and fix the placed aluminum sheet cover 100 through the electric suction cup 1602 to prevent it from deviating when rotating to the upper side of the circuit board body 200, thereby affecting the accuracy of subsequent drilling.

[0023] It also includes a plug-in board 17; the workbench 1 is fixed with several plug-in boards 17, and each fixed plate 15 has a slot. After the rotating frame 10 rotates, the plug-in board 17 is inserted into the slot of the fixed plate 15, thereby fixing the placement roller 16 and leaving it on the workbench 1, and then the aluminum sheet cover 100 and the circuit board body 200 are fixed by the placement roller 16.

[0024] The drilling rig 5 is connected to the suction pipe 6 , and the suction pipe 6 is connected to an external suction mechanism; a suction port is opened on the lower side of the drilling rig 5 , and the suction port is connected to the suction pipe 6 .

[0025] A limiting ring 1603 is provided at the rear end of the placement roller 16 , and the aluminum sheet cover 100 is limited by the limiting ring 1603 , thereby ensuring the accuracy of the placement position of the aluminum sheet cover 100 .

[0026] It also includes an electric push rod 2 101 and a positioning frame 102; the workbench 1 has a groove, in which several electric push rods 2 101 are fixed; the telescopic parts of all the electric push rods 2 101 are fixedly connected to a positioning frame 102, and the positioning frame 102 is slidably connected in the groove.

[0027] It also includes a third electric push rod 111 and a pressing plate 112; two third electric push rods 111 are fixedly connected to the upper side and the lower side of the rotating frame 10; and the telescopic parts of all the third electric push rods 111 on the same side are fixedly connected to a pressing plate 112.

[0028] It also includes an electric guide rail 121, an electric slider 122, an electric push rod 123 and a leveling rod 124; the rotating frame 10 is fixedly connected to two electric guide rails 121; each electric guide rail 121 is slidably connected to two electric sliders 122; each electric slider 122 is fixedly connected to an electric push rod 123; every two corresponding telescopic parts of the electric push rod 123 are each commonly fixedly connected to a leveling rod 124, and the leveling rod 124 is located between the rotating frame 10 and the protective film 13.

[0029] The protective film 13 is detachably connected to the mounting roller 12 . When there are a lot of impurities attached to the surface of the protective film 13 or when the protective film 13 is damaged, the protective film 13 can be removed and replaced.

[0030] The specific operation is as follows: in the existing circuit board drilling operation, the aluminum sheet is manually placed on the circuit board surface and fixed with tape. However, since the aluminum sheet is a large and thin sheet, it is easy to bend and deform, so manual operation is very difficult. In the subsequent process, the tape needs to be manually removed and the residue needs to be cleaned. This process is not only time-consuming and labor-intensive, but also significantly affects the overall processing efficiency of the circuit board. Therefore, at the beginning, if Figure 3As shown, the rotating frame 10 is in a vertical state, and the circuit board body 200 is manually placed on the surface of the pad 7. During the placement process, the position of the circuit board body 200 is positioned by the positioning frame 102, so that the circuit board body 200 can be placed manually and accurately. It should be noted that the positioning frame 102 is driven by the electric push rod 2 101 to move up and down in the groove, which can also adapt to the placement and positioning of multi-layer circuit boards; then the aluminum cover plate 100 is manually erected and abutted against the surface of the protective film 13, and placed in the placement groove 1601 of the placement roller 16, and the pressing plate 112 is driven to move by controlling the electric push rod 3 111, and the pressing plate 112 pushes the protective film 13 close to the placement groove 1601 of the placement roller 16, so that The aluminum sheet cover 100 is placed, and then the aluminum sheet cover 100 is moved from front to back along the protective film 13 and the placement roller 16, and is placed between the placement grooves 1601 of the two placement rollers 16. During the placement process, the aluminum sheet cover 100 is fitted and limited by the protective film 13 to prevent the aluminum sheet cover 100 from bending and deforming during the placement process, so as to facilitate the placement of the aluminum sheet cover 100; and, after the aluminum sheet cover 100 is placed, the electric suction cup 1602 provided on the placement groove 1601 is controlled to work to adsorb and fix the placed aluminum sheet cover 100; then the motor 8 is controlled to drive the rotating rod 9 and the rotating frame 10 to rotate the other connected parts ninety degrees, such as Figure 8 As shown, the aluminum cover plate 100 is rotated to the top of the circuit board body 200, and during the rotation process, the electric push rod 101 is controlled to drive the positioning frame 102 to move downward in the groove to prevent the positioning frame 102 from blocking the rotation of the placement roller 16; then the electric suction cup 1602 is controlled to stop adsorbing the aluminum cover plate 100, and then the placement roller 16 is controlled to rotate, as shown in FIG. Figure 9 As shown, the placement groove 1601 is rotated downward, thereby placing the aluminum sheet cover 100 on the upper side of the circuit board body 200; after the aluminum sheet cover 100 is placed, the placement roller 16 is rotated at the same time, and the placement groove 1601 clamps the placed aluminum sheet cover 100 and the circuit board body 200 to fix them, solving the existing problem of using tape to fix them, and then manually removing the tape and cleaning the residue, thereby improving the overall processing efficiency of the circuit board; and in the process of the fixing plate 15 rotating ninety degrees, the plug-in board 17 is inserted into the fixing plate at the same time. 15, the fixing plate 15 and the placing roller 16 are limited and fixed in the slot; when the placed aluminum cover 100 and the circuit board body 200 are stuck, the electric clamping plate 14 is controlled to loosen the fixing plate 15, and then the motor 8 is controlled to drive the rotating rod 9 and the rotating frame 10 to rotate and reset, and rotate them to a vertical state again, so as to facilitate the subsequent drilling of the circuit board body 200; then the electric drive moving block 3, the electric telescopic rod 4 and the drilling rig 5 cooperate with each other to drive the drilling rig 5 to move and drill the circuit board body 200, thereby completing the drilling operation of the circuit board body 200.

[0031] At the same time, it is taken into consideration that when the aluminum sheet cover 100 is located above the circuit board body 200, in the process of placing the aluminum sheet cover 100 downward, since the aluminum sheet cover 100 is large and thin, when it is directly placed down to fit on the upper side of the circuit board body 200, some gas will remain between the aluminum sheet cover 100 and the circuit board body 200, making it impossible for the aluminum sheet cover 100 to fully fit with the circuit board body 200, thereby affecting the accuracy of subsequent drilling; therefore, the aluminum sheet cover 100 is rotated to the top of the circuit board body 200, and before controlling the placement roller 16 to rotate, the electric push rod 123 is first controlled to drive the leveling rod 124 to move downward, and the leveling rod 124 first presses the middle part of the aluminum sheet cover 100 on the circuit board body 200, and then the placement roller 16 is controlled to rotate. 6 is rotated, and while the placing roller 16 is rotating, the electric slider 122 is synchronously controlled to drive the electric push rod 4 123 and the leveling rod 124 to move along the electric guide rail 121, pressing the aluminum sheet cover 100 from the middle to both ends, so that the other parts of the aluminum sheet cover 100 gradually fit with the circuit board body 200, and leveling the placed aluminum sheet cover 100 so that it fully fits with the surface of the circuit board body 200. The aluminum sheet cover 100 is pressed by the leveling rod 124 so that it gradually fits with the circuit board body 200 from the middle to both ends, thereby preventing some gas from remaining between the aluminum sheet cover 100 and the circuit board body 200 during the placement process, making it impossible to fully fit, thereby affecting the accuracy of subsequent drilling.

[0032] In addition, since debris will be generated during the drilling process, the debris will affect the accuracy of drilling. Therefore, during the drilling process of the drill rig 5, the external suction mechanism is controlled to suck the drill hole from the suction port on the lower side of the drill rig 5 through the suction pipe 6, so that the debris generated by drilling is extracted in time to avoid a large amount of debris affecting the accuracy of drilling. It should be noted that several drilling machines are set on the left and right sides of the workbench 1 to improve the processing efficiency of the circuit board. During drilling, the adjacent drilling machines can be separated by the vertical protective film 13 to avoid the debris generated by drilling affecting the surrounding drilling holes.

[0033] Example 2: Based on Example 1, Figure 10-11 As shown, it also includes an electric push rod five 201, a movable plate 202, a ventilation pipe 203 and an exhaust pipe 204; the workbench 1 is provided with a suction groove 1001, and the suction groove 1001 is located below the pad 7, and the pad 7 is provided with a through hole; a number of electric push rods five 201 are fixedly connected to the suction groove 1001; the telescopic parts of all the electric push rods five 201 are commonly connected to a movable plate 202, and the movable plate 202 slides at the through hole of the pad 7; the workbench 1 is fixed with two ventilation pipes 203, and the ventilation pipes 203 are connected to the external suction mechanism; each ventilation pipe 203 is connected to an exhaust pipe 204, and the exhaust pipe 204 is connected to the suction groove 1001.

[0034] The movable plate 202 is composed of two flat plates that rotate with each other, and the telescopic part of the electric push rod 5 201 is rotatably connected to the movable plate 202. When the movable plate 202 moves downward, the electric push rod 5 201 located in the middle is controlled to drive the middle part of the movable plate 202 to move upward, so that the two flat plates rotate and the movable plate 202 is rotated into an inverted V shape to guide the debris to move to both sides and be extracted, thereby improving the debris cleaning effect.

[0035] On the basis of the above embodiment 1, when the debris generated by drilling is sucked away by the suction tube 6, during drilling, due to the obstruction of the drill bit, some debris remains in the hole of the circuit board body 200, and when the circuit board body 200 after drilling is manually cleaned later, it is inconvenient for manual cleaning to remove the debris in the hole due to the small hole. Therefore, when the drilling is completed, the drill rig 5 is controlled to move and reset, and then the motor 8 is controlled to drive the rotating frame 10 to rotate ninety degrees, so that the protective film 13 is above the circuit board body 200 after drilling when the protective film 13 rotates, and then the electric push rod 3 111 is controlled to drive the pressing plate 112 to move downward, pushing the protective film 13 to move downward, so that the protective film 13 is in contact with the aluminum sheet cover 100 and the circuit board body 200 surface after drilling, and at the same time, the electric push rod 5 201 is controlled to drive the moving plate 202 to move downward in the suction groove 1001. When the moving plate When 202 moves to the bottom of the exhaust pipe 204, it stops moving. At this time, under the cover of the protective film 13, the drilled hole of the circuit board body 200 is in a closed space. Then, the external suction mechanism is controlled to suck the circuit board body 200 from the exhaust pipe 204 through the ventilation pipe 203 to extract the debris in the drilled hole, and the debris remaining on the surface of the circuit board body 200 and the surface of the movable plate 202 are extracted. By placing the circuit board body 200 in a closed space, the debris remaining in the drilled hole is sucked and cleaned, which can improve the suction effect of the debris, thereby reducing the difficulty of subsequent manual cleaning; and after the rotating frame 10 rotates, the electric clamping plate 14 is controlled to re-clamp the fixed plate 15. After the subsequent cleaning is completed, when the rotating frame 10 is controlled to rotate and reset, it drives the fixed plate 15 and the placement roller 16 to rotate and reset, so as to facilitate the subsequent placement of the aluminum sheet cover 100.

[0036] The movable plate 202 is composed of two flat plates that rotate with each other, and the telescopic portion of the electric push rod 5 201 is rotatably connected to the movable plate 202. When the movable plate 202 moves downward, the electric push rod 5 201 located in the middle is controlled to drive the middle portion of the movable plate 202 to move upward, so that the two flat plates rotate and the movable plate 202 is rotated into an inverted V shape. When the exhaust pipe 204 sucks debris, it is convenient to guide the debris to move to the exhaust pipes 204 on both sides, thereby improving the debris cleaning effect.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A multi-layer circuit board drilling machine, comprising a workbench (1), a fixed frame (2), an electric drive moving block (3), an electric telescopic rod (4), a drilling machine (5) and a pad (7); the workbench (1) is fixedly connected to the fixed frame (2); the fixed frame (2) is slidably connected to the electric drive moving block (3); the electric drive moving block (3) is fixedly connected to the electric telescopic rod (4); the drilling machine (5) is installed on the telescopic portion of the electric telescopic rod (4); the pad (7) is fixedly connected to the surface of the workbench (1); it is characterized in that The machine also includes a motor (8), a rotating rod (9), a rotating frame (10), an electric push rod (11), a mounting roller (12), a protective film (13), an electric clamping plate (14), a fixing plate (15) and a placing roller (16); the workbench (1) is fixedly connected to the motor (8); the workbench (1) is rotatably connected to the rotating rod (9), and the rotating rod (9) is fixedly connected to the output end of the motor (8); the rotating rod (9) is fixedly connected to the rotating frame (10); a plurality of electric push rods (11) are fixedly connected to the upper side and the lower side of the rotating frame (10); the telescopic parts of all the electric push rods (11) on the same side are respectively A mounting roller (12) is fixedly connected to the two mounting rollers (12); a protective film (13) is fixedly connected to the two mounting rollers (12); two electric clamping plates (14) are respectively installed on the upper side and the lower side of the rotating frame (10); each electric clamping plate (14) clamps a fixed plate (15); the two fixed plates (15) on the same side are respectively rotatably connected to a placement roller (16) for placing the aluminum sheet cover (100), and the placement roller (16) is configured as a motorized roller, the placement roller (16) is provided with a placement groove (1601), and the placement groove (1601) is provided with a motorized suction cup (1602).

2. A multi-layer circuit board drilling machine according to claim 1, characterized in that: It also includes a plug-in board (17); the workbench (1) is fixedly connected with a plurality of plug-in boards (17), and each fixed board (15) has a slot.

3. A multi-layer circuit board drilling machine according to claim 2, characterized in that: It also includes a suction pipe (6); the drilling rig (5) is connected to the suction pipe (6), and the suction pipe (6) is connected to an external suction mechanism; a suction port is opened on the lower side of the drilling rig (5), and the suction port is connected to the suction pipe (6).

4. A multi-layer circuit board drilling machine according to claim 3, characterized in that: A limiting ring (1603) is provided at the rear end of the placement roller (16).

5. A multi-layer circuit board drilling machine according to claim 1, characterized in that: It also includes an electric push rod 2 (101) and a positioning frame (102); the workbench (1) is provided with a groove, and a plurality of electric push rods 2 (101) are fixedly connected in the groove; the telescopic parts of all the electric push rods 2 (101) are fixedly connected to a positioning frame (102), and the positioning frame (102) is slidably connected in the groove.

6. A multi-layer circuit board drilling machine according to claim 5, characterized in that: It also includes an electric push rod three (111) and a pressing plate (112); two electric push rods three (111) are fixedly connected to the upper side and the lower side of the rotating frame (10); and the telescopic parts of all the electric push rods three (111) on the same side are fixedly connected to a pressing plate (112).

7. A multi-layer circuit board drilling machine according to any one of claims 5-6, characterized in that: The invention also includes an electric guide rail (121), an electric slider (122), an electric push rod (123) and a leveling rod (124); the rotating frame (10) is fixedly connected to two electric guide rails (121); each electric guide rail (121) is slidably connected to a plurality of electric sliders (122); each electric slider (122) is fixedly connected to an electric push rod (123); the telescopic parts of each two corresponding electric push rods (123) are fixedly connected to a leveling rod (124) for leveling the supporting protective film (13), and the leveling rod (124) is located between the rotating frame (10) and the protective film (13).

8. The multi-layer circuit board drilling machine according to claim 1, characterized in that: The protective film (13) and the mounting roller (12) are detachably connected.

9. The multi-layer circuit board drilling machine according to claim 1, characterized in that: The invention also includes an electric push rod five (201), a movable plate (202), a ventilation pipe (203) and an exhaust pipe (204); the workbench (1) is provided with a suction groove (1001), and the suction groove (1001) is located below the pad (7), and the pad (7) is provided with a through hole; the suction groove (1001) is fixedly connected to a plurality of electric push rods five (201); the telescopic parts of all the electric push rods five (201) are commonly connected to a movable plate (202), and the movable plate (202) slides at the through hole of the pad (7); the workbench (1) is fixedly connected to two ventilation pipes (203), and the ventilation pipes (203) are connected to an external suction mechanism; each ventilation pipe (203) is connected to an exhaust pipe (204), and the exhaust pipe (204) is connected to the suction groove (1001).

10. The multi-layer circuit board drilling machine according to claim 9, characterized in that: The movable plate (202) is composed of two mutually rotating flat plates, and the telescopic portion of the electric push rod (201) is rotatably connected to the movable plate (202).

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