CN108770204B - Drilling method and drilling system for printed circuit board - Google Patents
Drilling method and drilling system for printed circuit board Download PDFInfo
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- CN108770204B CN108770204B CN201810507565.7A CN201810507565A CN108770204B CN 108770204 B CN108770204 B CN 108770204B CN 201810507565 A CN201810507565 A CN 201810507565A CN 108770204 B CN108770204 B CN 108770204B
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- printed circuit
- circuit board
- drilling
- aluminum sheet
- workbench
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/0011—Working of insulating substrates or insulating layers
- H05K3/0044—Mechanical working of the substrate, e.g. drilling or punching
- H05K3/0047—Drilling of holes
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- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Drilling And Boring (AREA)
Abstract
The invention discloses a drilling method and a drilling system for a printed circuit board, and relates to the technical field of printed circuit board processing. The drilling processing method of the printed circuit board comprises the following steps: s1: fixing the printed circuit board on a workbench; s2: placing an aluminum sheet on the printed circuit board; s3: analyzing and determining the connecting position of the printed circuit board and the aluminum sheet, and fixing the connecting position by rivets or pins; s4: and drilling the printed circuit board. In the drilling processing method of the printed circuit board, the aluminum sheet and the printed circuit board are fixed through the pins or the rivets without using adhesive tapes, so that the fixing effect is better, the waste of the adhesive tapes can be avoided, the burrs of the printed circuit board can be reduced, and the product quality can be improved. In order to prevent the printed circuit board from being matched with the rivet or the pin and damaging the content hole and the circuit of the inner layer of the printed circuit board, the connection position of the printed circuit board and the aluminum sheet needs to be analyzed and determined before the aluminum sheet and the printed circuit board are fixed, so that the processing quality of the printed circuit board is ensured.
Description
Technical Field
The invention relates to the technical field of printed circuit board processing, in particular to a drilling method and a drilling system for a printed circuit board.
Background
Printed Circuit Boards (PCBs), also called Printed Circuit Boards (PCBs) and Printed Circuit Boards (PCBs), are providers of electrical connections for electronic components. The printed circuit board uses an insulating board as a base material, is cut into a certain size, is provided with at least one conductive pattern, and is provided with content holes (such as element holes, fastening holes, metalized holes and the like) for replacing a chassis of electronic components of the prior device and realizing the mutual connection of the electronic components.
Printed circuit boards are typically drilled with numerically controlled machining equipment. During drilling, the printed circuit board is fixed on the workbench, an aluminum sheet is arranged on the printed circuit board, the aluminum sheet and the printed circuit board are fixed through an adhesive tape, and then the printed circuit board is punched and processed through the numerical control processing equipment. By adopting the mode to process, the printed circuit board is easy to move in the processing process, so that the printed circuit board is poor in processing; in addition, the adhesive tape is fixed, the adhesive tape cannot be reused, the adhesive tape needs to be continuously replaced in the continuous production process, the adhesive tape is seriously wasted, the environment is affected, and after the adhesive tape is torn off, the adhesive on the adhesive tape can be stuck on a printed circuit board and is not easy to remove.
Disclosure of Invention
One object of the present invention is to provide a method for drilling a printed circuit board, in which the printed circuit board is fixed to an aluminum sheet with good fixing effect without using an adhesive tape, thereby avoiding waste of the adhesive tape.
In order to achieve the purpose, the invention adopts the following technical scheme:
a drilling processing method of a printed circuit board comprises the following steps:
s1: fixing the printed circuit board on a workbench;
s2: placing an aluminum sheet on the printed circuit board;
s3: analyzing and determining the connecting position of the printed circuit board and the aluminum sheet, and fixing the connecting position by rivets or pins;
s4: and drilling the printed circuit board.
Wherein, step S1 specifically includes:
the positioning device comprises a workbench, a printed circuit board and a positioning column, wherein the workbench is provided with the positioning column, the printed circuit board is provided with a positioning hole, and the printed circuit board is placed on the workbench so that the positioning column is matched with the positioning hole.
Wherein, step S3 specifically includes:
s31: determining coordinates of each point on the printed circuit board;
s32: analyzing and determining the position coordinates of the printed circuit board without chips, circuits and holes;
s33: processing a fixing hole at the determined position coordinate;
s34: and matching a pin or a rivet with the fixing hole.
Wherein, step S31 specifically includes:
and acquiring coordinates of each point on the printed circuit board according to a preset coordinate system of the workbench, the size of a pre-stored printed circuit board and the clamping position of the printed circuit board and the workbench.
Wherein, the interval between adjacent holes on the printed circuit board is not less than 5 mm.
When the printed circuit board and the aluminum sheet are fixed through rivets, the fixing holes are stepped holes, the large-aperture ends of the fixing holes are located on the aluminum sheet, and the small-aperture ends of the fixing holes are located on the printed circuit board.
Wherein the aperture of the large aperture end is 1.90-1.91mm, and the aperture of the small aperture end is 1.725-1.735 mm.
Wherein, between the step S2 and the step S3, the method further comprises:
and pre-fixing the aluminum sheet and the printed circuit board by using a clamp.
Wherein the thickness of the aluminum sheet is 0.15-0.18 mm.
Another object of the present invention is to provide a drilling system for a printed circuit board, in which the aluminum sheet and the printed circuit board are fixed effectively without using an adhesive tape, thereby avoiding waste of the adhesive tape.
In order to achieve the purpose, the invention adopts the following technical scheme:
a drilling system comprising a table, the drilling system further comprising:
a drilling assembly for drilling a printed circuit board; and
a control system electrically connected to the drilling assembly;
the drilling system applies the drilling processing method of the printed circuit board.
Has the advantages that: the invention provides a drilling method and a drilling system for a printed circuit board. In the drilling processing method of the printed circuit board, the aluminum sheet and the printed circuit board are fixed through the pins or the rivets without using adhesive tapes, so that the fixing effect is better, the waste of the adhesive tapes can be avoided, the burrs of the printed circuit board can be reduced, and the product quality can be improved. In order to prevent the printed circuit board from being matched with the rivet or the pin and damaging the content hole and the circuit of the inner layer of the printed circuit board, the connection position of the printed circuit board and the aluminum sheet needs to be analyzed and determined before the aluminum sheet and the printed circuit board are fixed, so that the processing quality of the printed circuit board is ensured.
Drawings
Fig. 1 is a flowchart of a drilling method of a printed circuit board provided by the present invention;
FIG. 2 is a schematic structural diagram of a printed circuit board and an aluminum sheet according to the present invention;
FIG. 3 is a schematic structural view of the rivet provided by the present invention.
Wherein:
1. a printed circuit board; 2. aluminum sheets; 21. a large pore diameter end; 22. a small bore end; 3. riveting; 31. an end portion; 32. a rivet post;
d1, diameter of rivet post; d2, the aperture of the small aperture end; d3, pore size at large pore size end.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.
The embodiment provides a drilling processing method of a printed circuit board, which can be used for automatic or semi-automatic processing of the printed circuit board.
As shown in fig. 1, before drilling the pcb, the pcb needs to be fixed on a table to prevent the pcb from moving during the drilling process. Wherein, the worktable is generally made of aluminum or iron materials. In order to avoid static electricity generated between the printed circuit board and the workbench in the processing process, the workbench is also provided with a bakelite plate. The bakelite plate has the characteristics of good insulation, no static electricity generation, wear resistance, high temperature resistance and the like, and is widely applied to mechanical dies and production lines. The bakelite plate can be fixed on the workbench through screws.
In this embodiment, the printed circuit board and the workbench are fixed in a clamping manner. Specifically, a positioning column is implanted into the bakelite plate on the workbench, and a positioning hole is formed in the printed circuit board. When the printed circuit board is placed on the workbench, the positioning column penetrates through the positioning hole, and the position of the printed circuit board is fixed through the matching of the positioning column and the positioning hole. Optionally, the number of the positioning columns is at least two, accordingly, the number of the positioning holes in the printed circuit board is the same as that of the positioning columns, and the fixing effect of the printed circuit board is improved.
In other embodiments, the workbench may be provided with a slot for accommodating the printed circuit board, and the slot is matched with the printed circuit board in shape and size, so that the printed circuit board is clamped in the slot, thereby fixing the printed circuit board. In order to facilitate the taking and placing of the printed circuit board, the edge of the workbench can be provided with a notch communicated with the clamping groove, and the printed circuit board can be operated through the notch when being taken and placed.
In order to avoid the contact fracture or damage of the drill and the workbench in the drilling process of the printed circuit board, a wood base plate can be further arranged on the bakelite plate, and the wood base plate can be a wood pulp plate. The thickness of the wood pad plate can be 2.5-3mm, the wood pad plate can prevent the workbench from being damaged, reduce outlet burrs, avoid the drill bit from being twisted off after being contacted with the workbench, reduce the temperature of the drill bit and be beneficial to cleaning the rubber slag in the groove of the drill bit. In addition, the wood base plate can protect the printed circuit board, and the rough surface of the bakelite plate can be prevented from scratching the printed circuit board. When the wood base plate is selected, the wood base plate does not contain organic grease, the surface of the wood base plate is ensured to have certain hardness, the plate is even and flat, and the processing quality of the printed circuit board is improved.
In this embodiment, the edge of wood backing plate is provided with the breach, and the reference column butt is in the breach, through the limiting displacement of a plurality of reference columns, fixes the wood backing plate on the bakelite board. In other embodiments, the wood base plate may also be provided with positioning holes at positions corresponding to the positioning columns, and the positioning columns sequentially penetrate through the positioning holes on the wood base plate and the positioning holes on the printed circuit board, and sequentially fix the wood base plate and the printed circuit board on the workbench.
The printed circuit board is fixed on the workbench through the matching of the positioning holes and the positioning columns, the positioning mode is simple, the fixing effect is better, and the printed circuit board can be conveniently taken and placed.
In the present embodiment, as shown in fig. 2, an aluminum sheet 2 having a small thickness is provided on a printed circuit board 1, the thickness of the aluminum sheet 2 is not more than 2mm, and the aluminum sheet 2 is stacked on the surface of the printed circuit board 1. The aluminum sheet 2 can buffer the impact force received when the printed circuit board 1 is contacted with the drill bit, so that the circuit board is prevented from cracking, and scraps generated in the processing process can be filtered. Wherein, the thickness of the aluminum sheet 2 may be 0.15-0.18 mm.
Because printed circuit board 1 is in the drilling process, the high-speed cutting printed circuit board 1 of rotating of drill bit will produce a large amount of heats, if the heat can't in time distribute, will lead to printed circuit board 1 to process badly. In the drilling process, the heat that the drill bit produced in the course of the work can in time distribute the air through aluminum sheet 2 in, avoid 1 high temperature of printed circuit board.
In order to prevent the aluminum sheet 2 from moving during the process, the aluminum sheet 2 needs to be fixed to the printed circuit board 1. In the prior art, the aluminum sheet 2 is generally fixed by using an adhesive tape, and the adhesive tape is not firmly fixed and cannot be reused. In order to solve the above problem, in the present embodiment, the aluminum sheet 2 and the printed circuit board 1 are fixed by rivets or pins, and preferably, the aluminum sheet 2 and the printed circuit board 1 are fixed by rivets.
Since the printed circuit board 1 is provided with a circuit therein, or a hole for receiving a signal is required to be formed therein so as to connect an electrical component, in order to prevent the printed circuit board 1 from being fixed to the aluminum sheet 2 by a pin or a rivet, the position of the pin or the rivet is provided with a circuit, or the hole for receiving a signal is required to be formed therein, and before the printed circuit board 1 is connected to the aluminum sheet 2, the connection position between the printed circuit board 1 and the aluminum sheet 2, that is, the position of the rivet, needs to be analyzed and determined.
Specifically, a coordinate system of a table is established in advance in a drilling system of the printed circuit board 1 for drilling the printed circuit board 1, and coordinates of a positioning column are determined. In addition, the drilling system of the printed circuit board 1 needs to store the information of the printed circuit board 1, which includes the size, the position of the content hole, the position of the positioning hole, and the circuit layout of the printed circuit board 1. After the printed circuit board 1 and the workbench are fixed through the matching of the positioning columns and the positioning holes, the coordinates of each point on the printed circuit board 1 in the coordinate system can be obtained in the drilling system by knowing the specific position of one of the positioning holes on the printed circuit board 1 and the coordinates of the positioning column matched with the positioning hole in the coordinate system.
Before fixing the printed circuit board 1 and the aluminum sheet 2, the drilling system can determine the mounting position of the rivet or the pin by analyzing the line position and the content hole position in the printed circuit board 1, the mounting position is not required to be drilled subsequently, and no line exists in the mounting position, so that the internal structure of the printed circuit board 1 is prevented from being damaged or subsequent drilling processing is prevented from being influenced.
After the installation position of the rivet is determined, a fixing hole is drilled at the corresponding position of the aluminum sheet 2 and the printed circuit board 1, and the rivet is in interference fit with the fixing hole so as to fix the aluminum sheet 2 on the printed circuit board 1.
Due to the fact that the thickness of the printed circuit board 1 is small, when the installation position of the rivet or the pin is determined, the size of the hole interval on the printed circuit board 1 needs to be considered, and the printed circuit board 1 is prevented from being broken due to the fact that the hole interval is small. In this embodiment, the pitch of the holes on the printed circuit board 1 is not less than 5 mm. Alternatively, the hole pitch on the printed circuit board 1 may be not less than 5mm, not less than 6mm, not less than 7mm, etc., and the hole pitch may be determined according to the actual thickness and size of the printed circuit board 1.
Specifically, the fixed orifices can be shoulder holes, the big aperture end 21 of shoulder holes is located aluminum sheet 2, the small aperture end 22 of shoulder holes is located printed circuit board 1, rivet and small aperture end 22 interference fit, the tip of rivet compresses tightly aluminum sheet 2 to it is fixed with printed circuit board 1 with aluminum sheet 2.
Since the rivet in the prior art is fixed by deforming its end in the fixing procedure to fix the two pieces, in order to prevent the printed circuit board 1 from being damaged during the deformation of the rivet end, as shown in fig. 3, the rivet 3 includes a rivet stem 32 and an end 31, and the rivet stem 32 and the end 31 are L-shaped. In the fixing process, only the interference fit between the rivet column 32 and the small-bore end 22 of the stepped hole needs to be ensured, and the end part 31 is pressed on the surface of the aluminum sheet 2, so that the printed circuit board 1 can be prevented from being damaged. Rivet 3 in this embodiment can reduce the area of contact of rivet 3 and aluminum sheet 2 through setting up to the L type, avoids influencing follow-up brill and gets the content hole.
Considering the thickness of the printed circuit board 1 and the aluminum sheet 2 and the fixing effect of the printed circuit board 1 and the aluminum sheet 2, the aperture D3 of the large aperture end 21 may be 1.90-1.91mm, the aperture D2 of the small aperture end 22 may be 1.725-1.735mm, and the diameter D1 of the rivet column 32 is 1.90-1.91mm, so that the rivet 3 can smoothly pass through the large aperture end 21 and be in interference fit with the small aperture end 22.
In order to prevent the aluminum sheet 2 from moving during drilling of the fixing hole, the aluminum sheet 2 and the edge of the printed circuit board 1 may be clamped by using a clamp, and the clamp may be removed after fixing with the rivet 3.
In order to further improve the fixed effect of aluminum sheet 2 and printed circuit board 1, the fixed orifices can extend to the wood backing plate, and the rivet cooperates with aluminum sheet 2, printed circuit board 1 and wood backing plate from top to bottom in proper order, can make printed circuit board 1 and aluminum sheet 2's fixed more firm, avoids printed circuit board 1 and reference column to break away from to guarantee printed circuit board 1's positioning accuracy, is favorable to improving printed circuit board 1's processingquality.
In this embodiment, aluminum sheet 2 passes through rivet fixation with printed circuit board 1, compares and fixes through the sticky tape among the prior art, not only can improve aluminum sheet 2 and printed circuit board 1's fixed efficiency, reduces staff's work load, can also improve fixed effect, compares the sticky tape extravagant and remain the adhesion.
The embodiment also provides a drilling system which can be applied to drilling the printed circuit board 1. The drilling system comprises a workbench, a drilling assembly and a control system, and the drilling system applies the drilling processing method of the printed circuit board.
Specifically, drilling system still stacks bakelite board and the wooden backing plate on the workstation in proper order, and the reference column has been implanted on the bakelite board. The control system comprises a calculation module and a storage module, wherein the storage module stores a coordinate system of the workbench, coordinates of the positioning column and size information of the printed circuit boards 1 of different types; the calculation module can calculate the coordinates of each point on the printed circuit board 1 according to the position of the positioning hole on the printed circuit board 1 and the size of the printed circuit board 1. The drilling system comprises a manipulator and a drill bit arranged on the manipulator, and the control assembly can control the manipulator to move to any position in a coordinate system and can control the drill bit to rotate so as to drill at a specified position.
For improving the work efficiency of every drilling system, the workstation of drilling system can be provided with a plurality of work areas, is in every work area to be can fix a printed circuit board 1, and every work area correspondence is provided with a drilling subassembly, and a plurality of work areas can be through processing to improve drilling system's machining efficiency.
In the embodiment, more than two printed circuit boards 1 can be simultaneously processed in each working area, specifically, more than two printed circuit boards 1 with the same structure are stacked together and fixed through the positioning columns, then the aluminum sheet 2 is placed on the printed circuit board 1 on the uppermost layer, and the more than two printed circuit boards 1 are simultaneously drilled. Considering the machining effect and the drilling effect comprehensively, two printed circuit boards 1 are stacked in the same working area in the embodiment, so that the machining quality of drilling is ensured.
The specific working process of the drilling system is as follows:
1. implanting a positioning column on the bakelite plate on the workbench;
2. placing the wood base plate, wherein the positioning columns are abutted in the notches at the edges of the wood base plate so as to fix the wood base plate;
3. the printed circuit board and the aluminum sheet 2 are placed in sequence, and the positioning hole in the printed circuit board is matched with the positioning column;
4. the control system obtains the coordinates of each point on the printed circuit board through the coordinate system of the workbench, the coordinates of the positioning column and the size information of the printed circuit board in the program;
5. the control system analyzes whether each point on the printed circuit board needs to be punched and whether a circuit or a chip is arranged in the printed circuit board, and determines the position coordinates of the fixing holes;
6. the control system controls the drilling assembly to drill a fixed hole;
7. the aluminum sheet 2 is fixed with the printed circuit board through the matching of the rivet and the fixing hole;
8. the control system controls the drilling assembly to drill the printed circuit board.
The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.
Claims (8)
1. A drilling method for a printed circuit board is characterized by comprising the following steps:
s1: fixing the printed circuit board (1) on a workbench;
s2: placing an aluminum sheet (2) on a printed circuit board (1);
s3: analyzing and determining the connecting position of the printed circuit board (1) and the aluminum sheet (2), and fixing by a rivet (3) or a pin;
s4: drilling the printed circuit board (1);
step S3 specifically includes:
s31: determining coordinates of each point on the printed circuit board (1);
s32: analyzing and determining the position coordinates of chips, circuits and holes which are not arranged on the printed circuit board (1);
s33: processing a fixing hole at the determined position coordinate;
s34: fitting a pin or rivet (3) with the fixing hole;
when printed circuit board (1) with aluminum sheet (2) pass through rivet (3) fixed, the fixed orifices is the shoulder hole, the big aperture end (21) of fixed orifices is located on aluminum sheet (2), the small aperture end (22) of fixed orifices is located on printed circuit board (1).
2. The method for drilling a printed circuit board according to claim 1, wherein the step S1 specifically includes:
the positioning device is characterized in that a positioning column is arranged on the workbench, a positioning hole is formed in the printed circuit board (1), and the printed circuit board (1) is placed on the workbench so that the positioning column is matched with the positioning hole.
3. The method for drilling a printed circuit board according to claim 1, wherein the step S31 specifically includes:
and acquiring coordinates of each point on the printed circuit board (1) according to a preset coordinate system of the workbench, a pre-stored size of the printed circuit board (1) and a clamping position of the printed circuit board (1) and the workbench.
4. The method of drilling a printed circuit board according to claim 1, wherein a pitch between adjacent holes on the printed circuit board (1) is not less than 5 mm.
5. The method of claim 1, wherein the large-aperture end (21) has an aperture of 1.90 to 1.91mm, and the small-aperture end (22) has an aperture of 1.725 to 1.735 mm.
6. The drilling method of printed circuit board as claimed in claim 1, further comprising between step S2 and step S3:
pre-fixing the aluminum sheet (2) and the printed circuit board (1) through a clamp.
7. The drilling method of a printed circuit board according to claim 1, wherein the thickness of the aluminum sheet (2) is 0.15-0.18 mm.
8. A drilling system comprising a table, characterized in that the drilling system further comprises:
a drilling assembly for drilling a printed circuit board (1); and
a control system electrically connected to the drilling assembly;
the drilling system applies the drilling processing method of the printed circuit board according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810507565.7A CN108770204B (en) | 2018-05-24 | 2018-05-24 | Drilling method and drilling system for printed circuit board |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810507565.7A CN108770204B (en) | 2018-05-24 | 2018-05-24 | Drilling method and drilling system for printed circuit board |
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| Publication Number | Publication Date |
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| CN108770204A CN108770204A (en) | 2018-11-06 |
| CN108770204B true CN108770204B (en) | 2021-06-01 |
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| CN201810507565.7A Active CN108770204B (en) | 2018-05-24 | 2018-05-24 | Drilling method and drilling system for printed circuit board |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112476595A (en) * | 2021-01-05 | 2021-03-12 | 成都六志和科技有限公司 | Drilling waste cleaning device for circuit board drilling machine |
| CN114536445B (en) * | 2022-04-24 | 2022-09-09 | 深圳市大族数控科技股份有限公司 | Plate positioning and conveying device, drilling equipment and plate positioning and conveying method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11266065A (en) * | 1998-03-18 | 1999-09-28 | Mitsubishi Gas Chem Co Inc | Manufacture of precision hole machining parts |
| CN104427771A (en) * | 2013-09-10 | 2015-03-18 | 北大方正集团有限公司 | Circuit board fixing device, drilling machine and circuit board fixing method during drilling |
-
2018
- 2018-05-24 CN CN201810507565.7A patent/CN108770204B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11266065A (en) * | 1998-03-18 | 1999-09-28 | Mitsubishi Gas Chem Co Inc | Manufacture of precision hole machining parts |
| CN104427771A (en) * | 2013-09-10 | 2015-03-18 | 北大方正集团有限公司 | Circuit board fixing device, drilling machine and circuit board fixing method during drilling |
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| CN108770204A (en) | 2018-11-06 |
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