Bidirectional drilling equipment for PCB (Printed Circuit Board) and drilling process thereof

Abstract

The invention discloses bidirectional drilling equipment for a PCB (Printed Circuit Board) and a drilling process of the bidirectional drilling equipment. The PCB bidirectional drilling equipment comprises a base station, a multi-degree-of-freedom driving device, a mechanical arm, a bidirectional drilling device, a vertical storage rack and a jig. The mechanical arm is arranged at the power output end of the multi-degree-of-freedom driving device, and the bidirectional drilling device is mounted on the mechanical arm; the jig is arranged on the vertical storage rack in a pluggable mode in the vertical direction. The bidirectional drilling device comprises a forward drilling mechanism and a reverse drilling mechanism, and the forward drilling mechanism and the reverse drilling mechanism are located on the two sides of the jig correspondingly. And the multi-degree-of-freedom driving device drives the forward drilling mechanism and the reverse drilling mechanism to move through the mechanical arm. According to the PCB two-way drilling equipment and the drilling process thereof, on the premise that supporting of a base plate is omitted, the two drill bits are adopted for drilling the circuit board from two directions at the same time, the problem that drilling dislocation is likely to happen in the prior art is solved, and meanwhile the drilling stability needs to be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit board production and manufacturing, and particularly to a two-way drilling device for a PCB board and its drilling process. Background Art

[0002] During the production and manufacturing process of circuit boards, drilling treatment is required. For some circuit boards with a high number of layers (generally 32 - 60 layers), a thick board thickness (generally 6.0 mm - 7.0 mm), and a small hole diameter (generally 0.2 mm), the operation is usually carried out by two-way drilling on the front and back sides. This can reduce the accident of drill bits breaking during the drilling process.

[0003] As Figure 1 shown, a wood pulp board 11, a circuit board 12, and an aluminum sheet 13 are sequentially stacked on a backing plate 14 to form a component, and the edges of the stacked component are fixed. Then, a drill bit 15 is used to drill the front side of the component. As Figure 2 shown, after the front side drilling is completed, the component is taken out from the backing plate 14, the stacking order is adjusted again, and the component is placed on the backing plate 14 again after reloading the board. Then, the drill bit 15 is used to drill the back side of the component.

[0004] As can be seen from the above, since the component needs to be turned over, after secondary positioning of the reloaded board, the position of the component will change slightly. Even a slight position change will cause misalignment of the front and back side drillings (as Figure 2 shown), resulting in a high defective rate of the product and low reliability.

[0005] Through the above analysis, it can also be known that in the prior art, the wood pulp board, the circuit board, and the aluminum sheet are mainly stacked on the backing plate in sequence. Since the backing plate is very thick and hard, if two drill bits are used to drill the circuit board simultaneously from two directions (as Figure 3 shown), this solution is not feasible, and the other drill bit will break when contacting the backing plate. The setting of the backing plate is originally to play a supporting role to prevent the circuit board from shaking during the drilling process.

[0006] Using two drill bits to drill the circuit board simultaneously from two directions is a good technical concept, but the premise is that the backing plate needs to be removed. Once the backing plate is removed, the circuit board will be in an embarrassing state without support.

[0007] Therefore, how to design and develop a two-way drilling device for a PCB board and its drilling process, which can drill the circuit board simultaneously from two directions using two drill bits on the premise of canceling the support of the backing plate, solve the problem of easy drilling misalignment in the traditional technology, and at the same time improve the drilling stability, is a technical problem to be solved. Summary of the Invention

[0008] The object of the present invention is to overcome the deficiencies in the prior art and provide a two-way drilling device for a PCB board and its drilling process. On the premise of canceling the support of the backing plate, two drill bits are used to drill the circuit board simultaneously from two directions, solving the problem of easy drilling misalignment in the traditional technology, and at the same time improving the stability of drilling.

[0009] The object of the present invention is achieved by the following technical solutions:

[0010] A two-way drilling device for a PCB board, comprising: a base, a multi-degree-of-freedom driving device, a robotic arm, a two-way drilling device, a vertical storage rack, and a fixture;

[0011] The multi-degree-of-freedom driving device is installed on the base, the robotic arm is arranged at the power output end of the multi-degree-of-freedom driving device, and the two-way drilling device is installed on the robotic arm;

[0012] The vertical storage rack is arranged on the base, and the fixture is detachably arranged on the vertical storage rack in the vertical direction;

[0013] The two-way drilling device includes a forward drilling mechanism and a reverse drilling mechanism, and the forward drilling mechanism and the reverse drilling mechanism are respectively located on both sides of the fixture;

[0014] The multi-degree-of-freedom driving device drives the forward drilling mechanism and the reverse drilling mechanism to move through the robotic arm.

[0015] In one embodiment, the multi-degree-of-freedom driving device includes: a horizontal X-axis moving module, a horizontal Y-axis moving module, and a vertical Z-axis moving module; the horizontal X-axis moving module drives the forward drilling mechanism and the reverse drilling mechanism to reciprocate along the horizontal X-axis direction through the robotic arm, the horizontal Y-axis moving module drives the forward drilling mechanism and the reverse drilling mechanism to reciprocate along the horizontal Y-axis direction through the robotic arm, and the vertical Z-axis moving module drives the forward drilling mechanism and the reverse drilling mechanism to reciprocate along the vertical Z-axis direction through the robotic arm.

[0016] In one embodiment,

[0017] The forward drilling mechanism includes a forward drill bit and a forward elastic support sleeve arranged on the robotic arm; the reverse drilling mechanism includes a reverse drill bit and a reverse elastic support sleeve arranged on the robotic arm;

[0018] The forward drill bit and the reverse drill bit are coaxially arranged;

[0019] The forward elastic support sleeve wraps the forward drill bit, and the open end of the forward elastic support sleeve is always elastically abutted against the material plate surface on the fixture; the reverse elastic support sleeve wraps the reverse drill bit, and the open end of the reverse elastic support sleeve is always elastically abutted against the material plate surface on the fixture;

[0020] The multi-degree-of-freedom driving device drives the forward drill bit and the reverse drill bit to alternately contact the material plate surface on the fixture through the robotic arm.

[0021] In one embodiment,

[0022] The open end of the forward elastic support sleeve abuts against the material plate surface on the fixture to form a forward sealing chamber; the open end of the reverse elastic support sleeve abuts against the material plate surface on the fixture to form a reverse sealing chamber;

[0023] The PCB board double-sided drilling device further includes a negative pressure dust suction device, and the negative pressure dust suction device is used for performing negative pressure air extraction on the forward sealing chamber and the reverse sealing chamber.

[0024] In one embodiment, the fixture is a square frame structure, and the fixture includes a left clamping plate and a right clamping plate.

[0025] In one embodiment, the left clamping plate and the right clamping plate are fastened and fitted together by bolts.

[0026] In one embodiment, a vertical guiding insertion slot is formed on the vertical storage rack.

[0027] A PCB board double-sided drilling process is realized by the above-mentioned PCB board double-sided drilling device, and includes the following steps:

[0028] Step 1: Provide a component, and this component includes a forward wood pulp board, a forward aluminum sheet, a PCB board, a reverse aluminum sheet, and a reverse wood pulp board which are stacked in sequence;

[0029] Step 2: Fix the component in the fixture, and then insert the fixture into the vertical storage rack;

[0030] Step 3: The forward drilling mechanism and the reverse drilling mechanism are respectively located on both sides of the fixture. The multi-degree-of-freedom driving device drives the forward drilling mechanism and the reverse drilling mechanism to move through the robotic arm. The forward drill bit and the reverse drill bit alternately contact the material plate surface on the fixture. The open end of the forward elastic support sleeve is always elastically abutted against the material plate surface on the fixture, and the open end of the reverse elastic support sleeve is always elastically abutted against the material plate surface on the fixture;

[0031] Step 4: After completing the drilling on both the front and back sides of the PCB board, take out the jig from the vertical storage rack, disassemble the jig, separate the components, and obtain the drilled PCB board.

[0032] In one embodiment, in Step 3, during the drilling process, the negative pressure dust suction device is activated. The negative pressure dust suction device is used to perform negative pressure pumping on the forward sealing chamber and the reverse sealing chamber to suck the dust generated during drilling.

[0033] A two-way drilling device and drilling process for a PCB board according to the present invention, on the premise of canceling the support of the backing plate, use two drill bits to drill the circuit board simultaneously from two directions, solve the problem of easy drilling misalignment in the traditional technology, and at the same time improve the stability of drilling. Brief Description of the Drawings

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0035] Figure 1 Schematic diagram of the prior art of laminating a wood pulp board, a circuit board, and an aluminum sheet on a backing plate in sequence to form a component and perform forward drilling;

[0036] Figure 2 For Figure 1 Schematic diagram of turning the component over and repositioning it on the backing plate and performing reverse drilling;

[0037] Figure 3 Conceptual diagram of using two drill bits to drill the circuit board simultaneously from two directions;

[0038] Figure 4 Three-dimensional view of the two-way drilling device for a PCB board according to an embodiment of the present invention;

[0039] Figure 5 For Figure 4 Plan view of the two-way drilling device for a PCB board shown;

[0040] Figure 6 For Figure 4 Partial view of the two-way drilling device for a PCB board shown;

[0041] Figure 7 Schematic diagram of using the two-way drilling device to drill the circuit board simultaneously from two directions for the component;

[0042] Figure 8 ForFigure 4 Structural diagram of the jig shown Specific implementation mode

[0043] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present invention more thorough and comprehensive.

[0044] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0046] As Figure 4 shown, the present invention discloses a two-way drilling device 20 for a PCB board, which includes: a base 100, a multi-degree-of-freedom driving device 200, a robotic arm 300, a two-way drilling device 400, a vertical storage rack 500, and a jig 600.

[0047] As Figure 4 shown, the multi-degree-of-freedom driving device 200 is installed on the base 100, the robotic arm 300 is arranged at the power output end of the multi-degree-of-freedom driving device 200, and the two-way drilling device 400 is installed on the robotic arm 300.

[0048] As Figure 4 shown, the vertical storage rack 500 is arranged on the base 100, and the jig 600 is vertically insertably arranged on the vertical storage rack 500.

[0049] As Figure 4 and Figure 5 shown, the two-way drilling device 400 includes a forward drilling mechanism 410 and a reverse drilling mechanism 420, and the forward drilling mechanism 410 and the reverse drilling mechanism 420 are respectively located on both sides of the jig 600.

[0050] The multi-degree-of-freedom driving device 200 drives the forward drilling mechanism 410 and the reverse drilling mechanism 420 to move through the robotic arm 300.

[0051] As Figure 4 shown, specifically, the multi-degree-of-freedom driving device 200 includes: a horizontal X-axis moving module 210, a horizontal Y-axis moving module 220, and a vertical Z-axis moving module 230. The horizontal X-axis moving module 210 drives the forward drilling mechanism 410 and the reverse drilling mechanism 420 to reciprocate along the horizontal X-axis direction through the robotic arm 300. The horizontal Y-axis moving module 220 drives the forward drilling mechanism 410 and the reverse drilling mechanism 420 to reciprocate along the horizontal Y-axis direction through the robotic arm 300. The vertical Z-axis moving module 230 drives the forward drilling mechanism 410 and the reverse drilling mechanism 420 to reciprocate along the vertical Z-axis direction through the robotic arm 300.

[0052] Next, the specific structure of the above-mentioned two-way drilling device 400 will be described (as Figure 6 and Figure 7 shown):

[0053] The forward drilling mechanism 410 includes a forward drill bit 411 and a forward elastic support sleeve 412 provided on the robotic arm 300. The reverse drilling mechanism 420 includes a reverse drill bit 421 and a reverse elastic support sleeve 422 provided on the robotic arm 300.

[0054] The forward drill bit 411 and the reverse drill bit 421 are coaxially arranged.

[0055] As Figure 7 shown, the forward elastic support sleeve 412 wraps the forward drill bit 411, and the open end of the forward elastic support sleeve 412 is always elastically abutted against the material plate surface on the fixture 600. The reverse elastic support sleeve 422 wraps the reverse drill bit 421, and the open end of the reverse elastic support sleeve 422 is always elastically abutted against the material plate surface on the fixture 600.

[0056] As Figure 7 shown, the multi-degree-of-freedom driving device 200 drives the forward drill bit 411 and the reverse drill bit 421 to alternately contact the material plate surface on the fixture 600 through the robotic arm 300.

[0057] Furthermore, the open end of the forward elastic support sleeve 412 abuts against the material plate surface on the fixture 600 to form a forward sealing chamber 430. The open end of the reverse elastic support sleeve 422 abuts against the material plate surface on the fixture 600 to form a reverse sealing chamber 440.

[0058] The PCB board two-way drilling device 20 further includes a negative pressure dust suction device (not shown in the figure), and the negative pressure dust suction device is used to perform negative pressure pumping on the forward sealing chamber 430 and the reverse sealing chamber 440.

[0059] Next, the working principle of the above PCB board two-way drilling device 20 will be described:

[0060] First, a component 30 is provided. The component 30 includes a positive wood pulp board 31, a positive aluminum sheet 32, a PCB board 33, a negative aluminum sheet 34, and a negative wood pulp board 35 stacked in sequence. Attaching aluminum sheets on both sides of the PCB board 33 can effectively conduct heat and cool the drill bit. At the same time, the wood pulp board is retained on the outermost side of the component. The wood pulp board is easy to be drilled through by the drill bit and has a certain strength, which can effectively ensure that the surface of the PCB board 33 is not prone to collapse, which is beneficial to the smooth progress of subsequent two-way drilling;

[0061] Next, the component 30 is fixed in the fixture 600, and then the fixture 600 is inserted into the vertical storage rack 500; as Figure 4 shown, the entire fixture 600 is inserted into the vertical storage rack 500 in a vertical posture, ensuring that the surface of the PCB board 33 is perpendicular to the horizontal plane, and the PCB board 33 is in an upright state, which can further prevent the PCB board from collapsing due to the influence of gravity, and at the same time is also beneficial for the multi-degree-of-freedom driving device 200 to drive the two-way drilling device 400 to perform two-way drilling through the robotic arm 300;

[0062] As Figure 7 shown, at this time, the forward drilling mechanism 410 and the reverse drilling mechanism 420 are respectively located on both sides of the fixture 600. The open end of the forward elastic support sleeve 412 always elastically abuts against the material surface of the fixture 600, and the open end of the reverse elastic support sleeve 422 always elastically abuts against the material surface of the fixture 600. Here, it should be noted that the open ends of the forward elastic support sleeve 412 and the reverse elastic support sleeve 422 always abut against both sides of the material surface of the fixture for the following reasons: on the one hand, whether it is forward drilling or reverse drilling, the support sleeve abuts against the material surface. In this way, during the drilling process, the material surface will be strongly supported and is not prone to large-scale collapse, ensuring drilling stability; on the other hand, dust will appear during the drilling process. The support sleeve abuts against the material surface to form a closed space (an air inlet hole is provided on the support sleeve). In this way, the generated dust can be sucked away by the negative pressure dust collection device to ensure cleanliness;

[0063] As Figure 7As shown, the multi-degree-of-freedom driving device 200 drives the forward drilling mechanism 410 and the reverse drilling mechanism 420 to move through the robotic arm 300, and the forward drill bit 411 and the reverse drill bit 421 alternately contact the material board surface on the fixture 600; in the present invention, the forward drilling mechanism 410 and the reverse drilling mechanism 420 are integrated on a robotic arm 300. Such a structural design can ensure the coaxiality of the forward drill bit 411 and the reverse drill bit 421 to the greatest extent. The forward drill bit 411 drills a blind hole with a certain depth from the front of the board surface, while the reverse drill bit 421 drills the board surface from the back to penetrate the corresponding blind hole; it should also be emphasized that during the process of the forward drill bit 411 and the reverse drill bit 421 alternately contacting the material board surface on the fixture 600 for drilling, due to the good elasticity of the forward elastic support sleeve 412 and the reverse elastic support sleeve 422, this can ensure that their open ends always abut against both sides of the material board surface of the fixture;

[0064] After punching both the front and back sides of the PCB board 33, the fixture 600 is taken out from the vertical storage rack 500, the fixture 600 is disassembled, and the component 30 is separated to obtain the punched PCB board 33; as Figure 8 shown, in the present invention, the fixture 600 is of a square frame structure. The fixture 600 includes a left clamping plate 610 and a right clamping plate 620. The left clamping plate 610 and the right clamping plate 620 can be locked and fitted together by bolts to clamp the component 30; in addition, a vertical guiding insertion slot 510 is provided on the vertical storage rack 500, and the fixture 600 can be conveniently inserted and removed from the vertical guiding insertion slot 510 of the vertical storage rack 500.

[0065] The present invention also discloses a two-way drilling process for a PCB board, which is realized by the above-mentioned two-way drilling equipment 20 for a PCB board, and includes the following steps:

[0066] Step 1: Provide a component, which includes a forward wood pulp board, a forward aluminum sheet, a PCB board, a reverse aluminum sheet, and a reverse wood pulp board stacked in sequence;

[0067] Step 2: Fix the component in the fixture, and then insert the fixture into the vertical storage rack;

[0068] Step 3: The forward drilling mechanism and the reverse drilling mechanism are respectively located on both sides of the fixture. The multi-degree-of-freedom driving device drives the forward drilling mechanism and the reverse drilling mechanism to move through the robotic arm. The forward drill bit and the reverse drill bit alternately contact the material board surface on the fixture. The open end of the forward elastic support sleeve always elastically abuts against the material board surface on the fixture, and the open end of the reverse elastic support sleeve always elastically abuts against the material board surface on the fixture; during the drilling process, the negative pressure dust suction device is started. The negative pressure dust suction device is used to perform negative pressure pumping on the forward sealing chamber and the reverse sealing chamber to suck the dust generated by drilling;

[0069] Step 4: After completing the drilling of both the front and back sides of the PCB board, take out the jig from the vertical storage rack, disassemble the jig, separate the components, and obtain the drilled PCB board.

[0070] A two-way drilling device for a PCB board and its drilling process according to the present invention drill the circuit board simultaneously from two directions using two drill bits on the premise of canceling the support of the backing plate, solve the problem of easy drilling misalignment in the traditional technology, and improve the stability of drilling at the same time.

[0071] The above-described embodiments only represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent should be subject to the appended claims.

Claims

1. A bidirectional drilling device for PCB boards, characterized in that: include: Base, multi-degree-of-freedom drive device, robotic arm, bidirectional drilling device, vertical rack, and fixture; The multi-degree-of-freedom driving device is installed on the base, the mechanical arm is arranged at the power output end of the multi-degree-of-freedom driving device, and the bidirectional drilling device is installed on the mechanical arm; The vertical storage rack is mounted on the base, and the fixture is pluggable on the vertical storage rack along the vertical direction; The bidirectional drilling device comprises a forward drilling mechanism and a reverse drilling mechanism, and the forward drilling mechanism and the reverse drilling mechanism are respectively located on two sides of the fixture; The multi-degree-of-freedom driving device drives the forward drilling mechanism and the reverse drilling mechanism to move through the mechanical arm.

2. The PCB board bidirectional drilling device according to claim 1, characterized in that: The multi-degree-of-freedom driving device includes: a horizontal X-axis moving module, a horizontal Y-axis moving module, and a vertical Z-axis moving module; the horizontal X-axis moving module drives the forward drilling mechanism and the reverse drilling mechanism to reciprocate along the horizontal X-axis direction through the robotic arm, the horizontal Y-axis moving module drives the forward drilling mechanism and the reverse drilling mechanism to reciprocate along the horizontal Y-axis direction through the robotic arm, and the vertical Z-axis moving module drives the forward drilling mechanism and the reverse drilling mechanism to reciprocate along the vertical Z-axis direction through the robotic arm.

3. The PCB board bidirectional drilling device according to claim 1 or 2, characterized in that: The forward drilling mechanism comprises a forward drilling nozzle and a forward elastic support sleeve provided on the mechanical arm; the reverse drilling mechanism comprises a reverse drilling nozzle and a reverse elastic support sleeve provided on the mechanical arm; The forward drill bit and the reverse drill bit are coaxially arranged; The forward elastic support sleeve wraps the forward drill bit, and the open end of the forward elastic support sleeve always elastically presses against the material plate surface on the jig; the reverse elastic support sleeve wraps the reverse drill bit, and the open end of the reverse elastic support sleeve always elastically presses against the material plate surface on the jig; The multi-degree-of-freedom driving device drives the forward drill bit and the reverse drill bit to contact the material plate surface on the fixture alternately through the mechanical arm.

4. The PCB board bidirectional drilling device according to claim 3, characterized in that: The open end of the forward elastic support sleeve is pressed against the material plate surface on the jig to form a forward sealing chamber; the open end of the reverse elastic support sleeve is pressed against the material plate surface on the jig to form a reverse sealing chamber; The PCB board bidirectional drilling equipment also includes a negative pressure dust suction device, which is used to perform negative pressure suction on the forward sealed chamber and the reverse sealed chamber.

5. The PCB board bidirectional drilling device according to claim 1 or 2, characterized in that: The jig is a square frame structure and comprises a left clamping plate and a right clamping plate.

6. The PCB board bidirectional drilling device according to claim 5, characterized in that: The left clamping plate and the right clamping plate are tightly fitted together by means of bolts.

7. The PCB board bidirectional drilling device according to claim 6, characterized in that: The vertical storage rack is provided with a vertical guide insertion slot.

8. A bidirectional drilling process for a PCB board, characterized in that: The method is implemented by the bidirectional drilling device for PCB boards according to any one of claims 1 to 7, comprising the following steps: Step 1: providing a component, the component comprising a positive wood pulp board, a positive aluminum sheet, a PCB board, a reverse aluminum sheet, and a reverse wood pulp board stacked in sequence; Step 2: fix the assembly in the fixture, and then plug the fixture into the vertical rack; Step 3: The forward drilling mechanism and the reverse drilling mechanism are respectively located on both sides of the jig, and the multi-degree-of-freedom driving device drives the forward drilling mechanism and the reverse drilling mechanism to move through the mechanical arm, and the forward drill bit and the reverse drill bit contact the material plate surface on the jig alternately, and the open end of the forward elastic support sleeve is always elastically supported on the material plate surface on the jig, and the open end of the reverse elastic support sleeve is always elastically supported on the material plate surface on the jig; Step 4: After completing the punching of the front and back sides of the PCB board, the jig is taken out from the vertical rack, the jig is dismantled, the components are separated, and the punched PCB board is obtained.

9. The bidirectional drilling process for PCB board according to claim 8, characterized in that: In step three, during the drilling process, the negative pressure dust suction device is started, and the negative pressure dust suction device is used to perform negative pressure exhaust on the forward sealed chamber and the reverse sealed chamber to absorb the dust generated by the drilling.

Images