Circuit board drilling apparatus and method

Abstract

The application relates to the technical field of circuit board drilling, and discloses a circuit board drilling device, which comprises a workbench, a groove is formed in the tabletop of the workbench, the groove is located below a circuit board when the circuit board is installed on the workbench, a sliding seat and a supporting pipe are installed in the groove, the supporting pipe is installed on the sliding seat, and the side of the sliding seat, which is away from the supporting pipe, slides on the bottom wall of the groove; a gas conveying device is installed on the workbench, the gas conveying device comprises a gas supply source and a gas outlet pipe connected with the gas supply source, the sliding seat is provided with an inner cavity, the inner cavity of the sliding seat is communicated with the gas outlet pipe, the supporting pipe is made of hollow elastic material, and one end of the supporting pipe is communicated with the inner cavity of the sliding seat. The application can improve the flatness of the inner wall of the milled groove of the circuit board.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of circuit board drilling, in particular to a circuit board drilling device and a second drilling method. BACKGROUND

[0002] Circuit board drilling is a process of circuit board manufacturing, mainly for punching holes in the circuit board. The first drilling of the circuit board requires a copper plating process, that is, copper is plated in the hole to enable connection between upper and lower layers, such as vias and component holes. The second drilling of the circuit board does not require copper plating, such as screw holes, positioning holes, and heat dissipation grooves. If the second drilling forms a hole, the hole is directly drilled, and if the second drilling forms a groove, the groove needs to be milled. Therefore, the hole does not need copper, and the first drilling process must be separated from the second drilling process.

[0003] Regardless of the first drilling or the second drilling, the cutting part of the circuit board needs to be cooled by a cooling material, such as a cooling liquid or a cooling gas. The cooling material is generally sprayed in a high-pressure manner and can also blow away the debris generated during drilling.

[0004] In the related art described above, when the cooling pipe sprays the cooling medium to the cutting part of the circuit board, the circuit board that has not been completely cut has a tendency to bend downward under the pressure of the cooling material, especially when the circuit board is milled in the second drilling. If the circuit board that has not been cut has a tendency to bend downward, the flatness of the inner wall of the groove needs to be improved when the cutter mills the groove in the downwardly bent circuit board. SUMMARY

[0005] In order to improve the flatness of the inner wall of the circuit board groove, the present application provides a circuit board drilling device and a second drilling method.

[0006] In a first aspect, the present application provides a circuit board drilling device, which adopts the following technical solution:

[0007] A circuit board drilling device, comprising a workbench, a recess is formed in the top surface of the workbench, the recess is located below the circuit board when the circuit board is installed on the workbench, a sliding seat and a support pipe are installed in the recess, the support pipe is installed on the sliding seat, and the side of the sliding seat away from the support pipe slides on the bottom wall of the recess; a gas supply device is installed on the workbench, the gas supply device comprises a gas supply source and a gas outlet pipe connected to the gas supply source, the sliding seat has an inner cavity, the inner cavity of the sliding seat is in communication with the gas outlet pipe, the support pipe is made of a hollow elastic material, and one end of the support pipe is in communication with the inner cavity of the sliding seat.

[0008] When the circuit board is installed on the workbench, according to the position of the milling groove, the sliding seat is slid to the position where the milling groove is about to be milled, the supporting pipe is located below the circuit board to be cut, the air outlet pipe inflates the supporting pipe, the supporting pipe can support the circuit board, when the milling cutter mills the circuit board and the cooling pipe sprays the cooling medium to the cut part of the circuit board, the cut circuit board has a tendency to bend downward, the supporting pipe supports the cut part of the circuit board, so that the gradually cut part of the circuit board is not easy to bend downward and deform, and the inner wall of the milled groove is relatively smooth; especially for the cut part of the milled groove which does not penetrate the lower surface of the circuit board, after the cut part is supported, when the cut part is completely cut, the cooling pipe also blows away the cut waste, and the cut waste is not easy to block in the milled groove.

[0009] Optionally, the air outlet pipe is located at the center position of the groove, a telescopic rod is connected between the sliding seat and the air outlet pipe, one end of the telescopic rod is rotatably installed on the outer circumferential side of the air outlet pipe, the telescopic rod rotates around the air outlet pipe as the rotation center, and the other end of the telescopic rod is in communication with the sliding seat.

[0010] By adopting the above technical scheme, the telescopic rod can be rotated first according to the position of the milling groove, and then the length of the telescopic rod is adjusted, so that the sliding seat is slid to the position where the milling groove is about to be milled.

[0011] Optionally, the telescopic rod comprises an outer rod and an inner rod in sealing sliding connection with the outer rod, the outer rod and the inner rod are both hollow structures, the inner rod is in communication with the outer rod, the inner rod is in communication with the sliding seat, and the outer rod is connected with a connecting ring which is rotatably installed on the air outlet pipe.

[0012] By adopting the above technical scheme, the telescopic rod is rotatably connected with the air outlet pipe through the connecting ring.

[0013] Optionally, the connecting ring is provided with a communication hole, the outer wall of the air outlet pipe is provided with a ring groove, and the outer rod is in communication with the ring groove through the communication hole.

[0014] By adopting the above technical scheme, no matter how the telescopic rod rotates, the gas in the air outlet pipe can enter the telescopic pipe.

[0015] Optionally, the inner wall of the groove is provided with a first discharge hole, the bottom of the workbench is provided with a second discharge hole, the first discharge hole and the second discharge hole are in communication with each other, the outer circumferential side of the air outlet pipe is provided with an air outlet hole, the air outlet hole is located above the ring groove, and the air outlet pipe is provided with an opening and closing assembly for opening and closing the air outlet hole.

[0016] By adopting the technical scheme, the slide is located below the circuit board, the opening and closing assembly is opened to form the air outlet hole when drilling the circuit board, the air pressure in the supporting pipe is reduced, the supporting pipe is separated from the circuit board, the cutter does not contact the supporting pipe when drilling the circuit board, and the waste chips in the groove can be discharged into the first discharge hole by the air outlet pipe, so that the waste chips can be discharged from the workbench through the first discharge hole and the second discharge hole.

[0017] When the cutter mills the groove in the circuit board, the opening and closing assembly is opened to form the air outlet hole, the air supply is supplied to make the supporting pipe contact the circuit board to be cut, the supporting pipe supports the circuit board, the part of the circuit board to be cut is kept in a flat state, the cutter does not easily contact the supporting pipe when milling the groove, and the opening and closing assembly is opened again to form the air outlet hole after the milling of the groove is completed, and the air outlet pipe blows the waste chips into the first discharge hole.

[0018] Optionally, the workbench is provided with a positioning mechanism for positioning the circuit board, the positioning mechanism comprises a plurality of positioning rods, the positioning rods slide up and down on the workbench, and the positioning rods are provided with two clamping blocks for clamping the circuit board.

[0019] By adopting the technical scheme, the positioning rods clamp the circuit board through the two clamping blocks, the circuit board is positioned on the workbench, the cutter drills the circuit board at intervals, the positioning rods are slid upward after the cutter drills the circuit board at intervals, the slide is slid to be located below the part of the circuit board to be cut, and the supporting pipe of the slide can support the part of the circuit board to be cut.

[0020] Optionally, the positioning rods are provided with positioning blocks, the workbench is provided with positioning grooves for inserting the positioning blocks, the positioning rods are provided with driving members for driving the positioning blocks to be inserted into the positioning grooves, and the circuit board is spaced apart from the workbench when the positioning blocks are inserted into the positioning grooves.

[0021] By adopting the technical scheme, when the positioning rods are slid upward, the positioning rods can be fixed by the positioning blocks, and then the light rays are projected to form an outline in the groove after the light rays pass through the spaced-apart drill holes, so that the position of the slide can be quickly determined.

[0022] In a second aspect, the application provides a two-drilling method of a circuit board, which adopts the following technical scheme:

[0023] A two-drilling method of a circuit board, the method is based on the above-mentioned circuit board drilling device, the front surface of the circuit board is fixed on the workbench with the front surface facing upward, and the hole is milled or the groove is milled at the surface copper layer or the plate edge metallization slot hole of the circuit board; wherein,

[0024] The milling hole or slot on the surface copper layer of the circuit board comprises: first drilling holes along the contour of the required hole or slot, and then continuously milling holes or slots on the circuit board along the spaced-apart drilled holes; in the process of continuously milling holes or slots, the gas outlet pipe inputs gas into the support pipe, so that the support pipe supports the circuit board to be cut;

[0025] The milling hole or slot on the plate edge metallization slot hole comprises: first drilling a hole at a hole wall position on one side of the intersection of the plate edge metallization slot hole and the plate edge of the circuit board, and then continuously milling holes or slots along the contour of the required hole or slot; in the process of continuously milling holes or slots, the gas outlet pipe inputs gas into the support pipe, so that the support pipe supports the circuit board to be cut.

[0026] By adopting the above technical scheme, if the position of the second drilling is on the surface copper layer, the drilling equipment drills spaced-apart holes on the circuit board, and each drilled hole drills the copper layer on the circuit board longitudinally, and in the process of milling holes or slots, since the copper layer on the circuit board is intermittent, copper wires are not easy to appear, the flatness of the copper layer of the hole edge or the slot edge of the circuit board during the second drilling is improved, and the support pipe can also support the circuit to be cut, and the inner wall after slotting is relatively flat;

[0027] If the plate edge metallization slot hole is expanded or slotted at the intersection of the plate edge metallization slot hole and the plate edge of the circuit board, the drilling equipment first drills a hole at a hole wall position on one side of the intersection of the plate edge metallization slot hole and the plate edge of the circuit board, and the cutter continuously mills holes or slots along the contour of the expansion or slotting, so that the copper wires in the copper layer do not easily continue to generate following the rotation of the milling cutter during continuous rotation, thereby improving the flatness of the copper layer of the hole edge or the slot edge of the circuit board during the second drilling, increasing the yield rate of the circuit board during batch processing, and the support pipe can also support the circuit to be cut, and the inner wall after slotting is relatively flat.

[0028] In summary, the present application has at least one of the following beneficial effects:

[0029] 1. During slot milling, the support pipe can also support the part of the circuit board to be cut, so that the cutter improves the flatness of the inner wall of the hole or slot formed by the circuit board during slot milling;

[0030] 2. During the second drilling, the circuit board is first drilled to break the longitudinal copper layer, and in the process of milling holes or slots, since the copper layer on the circuit board is intermittent, copper wires are not easy to appear, thereby improving the flatness of the copper layer of the hole edge or the slot edge of the circuit board during the second drilling. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present application;

[0032] Figure 2 is a structural schematic diagram of the telescopic rod embodied by the embodiment of the present application;

[0033] Figure 3 is an enlarged schematic diagram of A of Figure 2 ;

[0034] Figure 4 is a structural schematic diagram of the air outlet pipe having air outlet holes of the embodiment of the present application;

[0035] Figure 5 is an enlarged schematic diagram of B of Figure 4 ;

[0036] Figure 6 is a schematic diagram of the positioning structure positioning the circuit board of the embodiment of the present application;

[0037] Figure 7 is a sectional view of the positioning block of the embodiment of the present application;

[0038] Figure 8 is a processing step flow chart of the circuit board of the embodiment of the present application;

[0039] Figure 9 is a schematic diagram of the embodiment of the present application mainly drilling the surface copper layer;

[0040] Figure 10 is a schematic diagram of the embodiment of the present application mainly drilling the board edge metallization groove hole.

[0041] The reference signs are as follows: 1, workbench; 11, groove; 12, first discharge hole; 13, second discharge hole; 14, positioning groove; 2, sliding seat; 3, support pipe; 4, air outlet pipe; 41, ring groove; 42, air outlet hole; 5, telescopic rod; 51, outer rod; 52, inner rod; 53, connecting ring; 6, plugging plate; 7, positioning mechanism; 71, positioning rod; 72, clamping block; 73, positioning block; 74, compression spring; 8, surface copper layer; 9, board edge metallization groove hole; 10, circuit board. DETAILED DESCRIPTION

[0042] The following will be further explained in detail in combination with the accompanying Figures 1-10 The present application is further explained in detail.

[0043] The embodiment of the present application discloses a circuit board drilling device. Referring to Figure 1 , a circuit board drilling device comprises a workbench 1 and a moving seat (not shown in the figure) above the workbench 1, the moving seat is controlled by numerical control, the moving seat is installed with a cutter and a cooling pipe. The moving of the moving seat, the driving of the cutter to run and the cooling principle of the cooling pipe to the circuit board 10 are all prior art, and the embodiment of the present application does not make much repetition.

[0044] The workbench 1 is provided with a groove 11 in the top surface thereof, the cross section of the groove 11 is rectangular, the groove 11 is located below the circuit board 10, and the cross section area of the circuit board 10 is larger than that of the groove 11. The workbench 1 is provided with a sliding seat 2 and a supporting pipe 3 mounted on the sliding seat 2, the sliding seat 2 slides on the bottom wall of the groove 11, and one end of the supporting pipe 3 extends out of the sliding seat 2. The sliding seat 2 can be located below the circuit board 10 to be cut by sliding the sliding seat 2.

[0045] The workbench 1 is provided with a gas supply device, which comprises a gas supply source and a gas outlet pipe 4 connected to the gas supply source. The gas supply source is a gas pump (not shown in the figure) mounted on the outer wall of the workbench, and one end of the gas outlet pipe 4 extends into the groove 11. The sliding seat 2 has an inner cavity, and the inner cavity of the sliding seat 2 is in communication with the gas outlet pipe 4. The supporting pipe 3 is made of a hollow elastic material, and one end of the supporting pipe 3 is in communication with the inner cavity of the sliding seat 2. The gas outlet pipe 4 of the embodiment can be a flexible pipe, and the gas outlet pipe 4 can be deformed when the sliding seat 2 slides. When the gas supply source supplies gas to the gas outlet pipe 4, the gas outlet pipe 4 inflates the supporting pipe 3 through the sliding seat 2, and the supporting pipe 3 can support the circuit board 10 to be cut.

[0046] In an embodiment, referring to Figure 2 , a telescopic rod 5 is connected between the sliding seat 2 and the gas outlet pipe 4, the telescopic rod 5 is horizontally arranged, one end of the telescopic rod 5 is rotatably mounted on the outer periphery of the gas outlet pipe 4. The gas outlet pipe 4 can be a hard pipe, the gas outlet pipe 4 is located at the center of the groove 11, the telescopic rod 5 rotates around the gas outlet pipe 4 as the rotation center, and the other end of the telescopic rod 5 is mounted on the sliding seat 2. The position of the sliding seat 2 in the groove 11 can be changed by rotating the telescopic rod 5 and controlling the length of the telescopic rod 5.

[0047] In an embodiment, referring to Figure 3 , the telescopic rod 5 comprises an outer rod 51 and an inner rod 52 in sealing sliding connection with the outer rod 51, and the outer rod 51 and the inner rod 52 are both hollow structures and are in communication with each other. One end of the inner rod 52 away from the outer rod 51 is in communication with the inner cavity of the sliding seat 2, and the other end of the outer rod 51 away from the inner rod 52 is connected with a connecting ring 53, which is rotatably mounted on the gas outlet pipe 4. The outer wall of the gas outlet pipe 4 is provided with a ring groove 41, and fixed rods are arranged in the ring groove 41 at intervals. The connecting ring 53 blocks the ring groove 41, the connecting ring 53 is provided with a communication hole, and the telescopic rod 5 is in communication with the gas outlet pipe 4 through the communication hole.

[0048] In an embodiment, referring to Figure 4 and Figure 5, the inner wall of the groove 11 is provided with a first discharge hole 12, the central axis of the first discharge hole 12 is horizontally arranged, and a plurality of first discharge holes 12 are arranged along the inner wall of the groove 11. The bottom of the workbench 1 is provided with a second discharge hole 13, the central axis of the first discharge hole 12 is perpendicular to the central axis of the second discharge hole 13, the second discharge hole 13 corresponds to the first discharge hole 12 one by one, and the first discharge hole 12 and the second discharge hole 13 are communicated with each other. The outer periphery of the air outlet pipe 4 is provided with an air outlet hole 42, the air outlet hole 42 is located above the annular groove 41, and a start-stop assembly for opening and closing the air outlet hole 42 is installed in the air outlet pipe 4.

[0049] The start-stop assembly includes a sealing plate 6 and a controller for controlling the opening and closing of the sealing plate 6, the cross section of the sealing plate 6 is the same as the cross section of the inner wall of the air outlet pipe 4, and the sealing plate 6 is rotatably installed in the air outlet pipe 4. The controller is a program setting control or a manual control, the structure and function of the start-stop assembly are prior art, and will not be described in detail.

[0050] After the milling groove is completed, the start-stop assembly opens the air outlet hole 42, and the gas is blown into the groove 11 to clean the debris.

[0051] When the tool drills holes in the circuit board 10, the air outlet hole 42 is also in an open state. The air supply of the air supply source makes the air outlet pipe 4 blow air to clean the debris. When the air outlet hole 42 is in an open state, the support pipe 3 leaves a gap with the circuit board 10, and the tool can keep a distance from the support pipe 3 no matter where the tool drills holes on the circuit board 10.

[0052] Only in the milling groove stage, the air outlet hole 42 is in a closed state, and the air pump can lift the support pipe 3 through the air supply pipe. The support pipe 3 supports the part of the circuit board 10 to be cut, so that the part of the circuit board 10 to be cut is not easily bent due to the impact of the cooling material of the cooling pipe, and the edges of the cut groove or hole are more flat. The milling and drilling positions of the circuit board 10 in the same batch are the same, so the position of the sliding seat 2 in the groove 11 needs to be adjusted only once for the same batch of circuit boards 10.

[0053] In an embodiment, referring to Figure 6 , the workbench 1 is provided with a positioning mechanism 7 for positioning the circuit board 10, the positioning mechanism 7 includes a plurality of positioning rods 71, and the embodiment has four positioning rods 71. The four positioning rods 71 are distributed along the profile of the groove 11. The positioning rod 71 is provided with two clamping blocks 72 for clamping the circuit board 10, one clamping block 72 is fixedly installed on the positioning rod 71 and embedded in the workbench 1, and the other clamping block 72 is detachably installed on the positioning rod 71. The clamping block 72 and the positioning rod 71 are connected through threads. The circuit board 10 is positioned on the workbench 1 by clamping of the two clamping blocks 72.

[0054] In an embodiment, referring toFigure 7 The positioning rod 71 is slidably installed on the workbench 1, and when the positioning rod 71 is slid upward, it is convenient for a hand to reach into the groove 11 to adjust the position of the sliding seat 2. In order to keep the positioning rod 71 fixed when adjusting the sliding seat 2, the positioning rod 71 is installed with a positioning block 73, the positioning rod 71 is provided with an installation slot for installing the positioning block 73, a driving piece for driving the positioning block 73 to extend out of the installation slot is installed in the installation slot, and the workbench 1 is provided with a positioning slot 14 for inserting the positioning block 73. The driving piece is a compression spring 74, and when the positioning rod 71 is slid upward to the positioning block 73 close to the positioning slot 14, the compression spring 74 drives the positioning block 73 to insert into the positioning slot 14. The lower surface of the positioning block 73 is provided with an inclined surface, and part of the inclined surface is located in the positioning slot 14. If it is needed to slide the positioning rod 71 downward, the positioning rod 71 is pressed downward, the positioning block 73 is pressed to compress the compression spring 74, the positioning block 73 returns to the installation slot, the positioning rod 71 slides downward, and the positioning block 73 abuts against the inner wall of the workbench 1.

[0055] When it is needed to mill a groove or a hole, the positioning rod 71 is first slid upward, then the circuit board 10 is irradiated with light, the light transmits through the drilled hole to form a projection, the position where the sliding seat 2 should slide is determined, and the sliding seat 2 can be accurately slid to below the circuit board 10 to be cut.

[0056] The implementation principle of the circuit board drilling equipment in the embodiment of the present application is as follows:

[0057] When the circuit board 10 is positioned on the work platform, the opening and closing assembly keeps the air outlet hole 42 in an open state to clean the waste in the groove 11 at any time, and when the groove of the circuit board 10 is milled, the opening and closing assembly closes the air outlet hole 42, the sliding seat 2 slides to below the circuit board 10 to be cut, the air source is first opened to inflate the supporting pipe 3 to make the supporting pipe 3 swell, the supporting pipe 3 supports the circuit board 10 to be cut, and the inner wall of the milled groove is cut flat after the groove is milled.

[0058] The present application also discloses a two-drilling method of a circuit board.

[0059] With reference to Figure 8 The two-drilling method of the circuit board is realized based on the above-mentioned circuit board drilling equipment, and comprises the following steps.

[0060] S1, fixing the circuit board 10 with the front face upward on the workbench 1;

[0061] S2, milling a hole or a groove at the surface copper layer 8 of the circuit board 10 or at the intersection of the plated-through hole 9 and the board edge of the circuit board 10.

[0062] With reference to Figure 9The method for milling holes or grooves in the surface copper layer 8 of the circuit board 10 comprises the following steps: firstly, drilling holes along the contour of the holes or grooves to be formed, and then cutting the copper layer of the circuit board 10 longitudinally, and finally, continuously milling holes or grooves along the contour of the holes or grooves to be formed. In this way, the copper layer of the circuit board 10 will not be continuously cut into copper wires along with the rotation of the cutter. During the continuous milling of the holes or grooves, the gas outlet pipe 4 inputs gas into the supporting pipe 3, so that the supporting pipe 3 supports the circuit board 10 to be cut, thereby improving the flatness of the inner wall of the holes or grooves formed in the circuit board 10.

[0063] With reference to Figure 10 The method for milling holes or grooves in the surface copper layer 8 of the circuit board 10 comprises the following steps: firstly, drilling holes along the contour of the holes or grooves to be formed, and then cutting the copper layer of the circuit board 10 longitudinally, and finally, continuously milling holes or grooves along the contour of the holes or grooves to be formed. In this way, the copper layer of the circuit board 10 will not be continuously cut into copper wires along with the rotation of the cutter. During the continuous milling of the holes or grooves, the gas outlet pipe 4 inputs gas into the supporting pipe 3, so that the supporting pipe 3 supports the circuit board 10 to be cut, thereby improving the flatness of the inner wall of the holes or grooves formed in the circuit board 10.

[0064] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Any equivalent changes made on the basis of the structure, shape and principle of the present application should be covered by the protection scope of the present application.

Claims

1. A circuit board drilling device, comprising a worktable (1), characterized in that: The workbench (1) has a groove (11) on its surface. When the circuit board (10) is installed on the workbench (1), the groove (11) is located below the circuit board (10). A slide (2) and a support tube (3) are installed in the groove (11). The support tube (3) is installed on the slide (2). The side of the slide (2) facing away from the support tube (3) slides on the bottom wall of the groove (11). An air supply device is installed on the workbench (1). The air supply device includes an air supply source and an air outlet pipe (4) connected to the air supply source. The slide (2) has an inner cavity. The inner cavity of the slide (2) is connected to the air outlet pipe (4). The support tube (3) is made of hollow elastic material. One end of the support tube (3) is connected to the inner cavity of the slide (2). The air outlet pipe (4) is located at the center of the groove (11). A telescopic rod (5) is connected between the slide (2) and the air outlet pipe (4). One end of the telescopic rod (5) is rotatably installed on the outer periphery of the air outlet pipe (4). The telescopic rod (5) rotates around the air outlet pipe (4) as the rotation center. The other end of the telescopic rod (5) is connected to the slide (2). The telescopic rod (5) includes an outer rod (51) and an inner rod (52) that is slidably connected to the outer rod (51). Both the outer rod (51) and the inner rod (52) are hollow inside. The inner rod (52) is connected to the outer rod (51) and to the slide block (2). The outer rod (51) is connected to a connecting ring (53), which is rotatably mounted on the air outlet pipe (4). The connecting ring (53) has a connecting hole, and the outer wall of the air outlet pipe (4) has an annular groove (41). The outer rod (51) is connected to the annular groove (41) through the connecting hole. The inner wall of the groove (11) is provided with a first discharge hole (12), and the bottom of the workbench (1) is provided with a second discharge hole (13). The first discharge hole (12) and the second discharge hole (13) are connected to each other. The outer periphery of the air outlet pipe (4) is provided with an air outlet hole (42). The air outlet hole (42) is located above the annular groove (41). The air outlet pipe (4) is equipped with an opening and closing component for opening and closing the air outlet hole (42).

2. The circuit board drilling equipment according to claim 1, characterized in that: The workbench (1) is equipped with a positioning mechanism (7) for positioning the circuit board (10). The positioning mechanism (7) includes several positioning rods (71). The positioning rods (71) slide up and down on the workbench (1). Two clamping blocks (72) for clamping the circuit board (10) are installed on the positioning rods (71).

3. The circuit board drilling equipment according to claim 2, characterized in that: The positioning rod (71) is equipped with a positioning block (73), and the worktable (1) has a positioning groove (14) for the positioning block (73) to be inserted. The positioning rod (71) is equipped with a driving component for driving the positioning block (73) to be inserted into the positioning groove (14). When the positioning block (73) is inserted into the positioning groove (14), there is a gap between the circuit board (10) and the worktable (1).

4. A two-drilling method for a circuit board, characterized in that: The method is implemented using a circuit board (10) drilling device as described in any one of claims 1 to 3, wherein the circuit board (10) is fixed on the worktable (1) with its front side facing upwards, and milling holes or grooves are performed at the copper layer (8) on the surface of the circuit board (10) or at the metallized slots (9) on the edge of the board; wherein, The milling or slotting of the copper layer (8) on the surface of the circuit board (10) includes: first drilling holes at intervals along the outline of the holes or slots to be opened, and then continuously milling holes or slots on the circuit board (10) along the intervals of the drilled holes. During the continuous milling or slotting process, the vent pipe (4) inputs gas into the support pipe (3) so that the support pipe (3) supports the circuit board (10) being cut. The milling or slotting at the metallized slot (9) on the board edge includes: first, drilling a hole at the position of the hole wall on one side where the metallized slot (9) intersects with the edge of the circuit board (10), and then continuously milling or slotting along the contour of the hole or slot to be opened. During the continuous milling or slotting process, the vent pipe (4) inputs gas into the support pipe (3) so that the support pipe (3) supports the circuit board (10) being cut.

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