CN104168713A - Printed circuit board routing method - Google Patents

Abstract

The present invention provides a printed circuit board board method, the method comprising: providing a whole printed circuit board to be printed circuit board, the whole printed circuit board includes at least two printed circuit single boards, a single board At least a part of the secondary gong-shaped waste area is located between adjacent printed circuit boards, and at least a part of the primary gong-shaped waste area is located on the edge of the entire printed circuit board ; Set the first positioning piece for fixing the printed circuit board in the secondary waste area; use the machine to remove the primary waste area; set the outer side of the board edge formed by the primary Fix the second positioning part of the printed circuit board; use a cutting machine to remove the secondary waste area. By this method, the entire printed circuit board that cannot be provided with positioning holes on the edge of the board and has no suitable positioning holes in the board can be boarded, which improves the utilization rate of the board; in addition, it avoids the situation of multiple holes and missing holes, Dimensional control is stable and precise.

Description

Gong board method for printed circuit boards

technical field

The invention belongs to the technical field of printed circuit board (PCB, Printing Circuit Board) production, and in particular relates to a PCB board method.

Background technique

With the development of electronic technology, PCB boards have replaced the connection methods of traditional electronic components and are widely used in electronic products.

At present, in the PCB board processing industry, in order to facilitate large-scale production and improve production efficiency, it is often necessary to first manufacture a whole PCB board containing multiple PCB boards (also known as single PCS boards or printed circuit boards) ( Also known as a whole printed circuit board); then, by processing the entire PCB board to form multiple PCB single boards and/or form a PCB connection board (also known as a printed circuit connection board ).

The methods for processing the shape of the entire PCB mainly include V-CUT, beer board and gong board. Among them, V-CUT is to cut a V-shaped linear shallow groove at the position where the whole PCB board needs to be divided. With the help of this V-shaped shallow groove, the PCB single board can be easily broken off. The disadvantage of this method is that it can only process rectangular PCB single board, and the edge of the board after splitting is relatively rough. Beer board is also called punching type. It uses a punch to punch out PCB boards or multiple PCB boards. This method can punch out the required shape, and this method is suitable for mass production. The disadvantage of beer board is that it needs to open the mold, which is time-consuming and laborious, and after the board is divided, the edge roughness of the board is relatively large and there are more board scraps. The gong board is to use a gong machine to punch out a predetermined shape on the entire PCB board to form a PCB connecting board or a plurality of PCB single boards. The gong machine is a milling machine that can process the shape of the PCB board. In the present invention, " Gong" and "milling" are not distinguished. Due to the smooth edge and precise size of the PCB board produced by the gong board method, it can greatly save time and cost in small batches and sample production. Therefore, the gong board is the preferred method for the PCB board shape processing technology.

In the process of gong board, in order to ensure the dimensional accuracy, it is necessary to fix the whole PCB board. In general, positioning holes (also known as PIN holes) are opened on the upper, lower, left and right edges of the entire PCB board (also known as SET sides), and positioning pins (also known as PIN) are used. The method of securing (also known as PIN tacking). However, when large-scale production of PCB boards is required, in order to improve the typesetting utilization rate of PCBs and reduce costs, the board edge is often not left when designing the PCB, so that positioning holes or PIN nails cannot be opened on the board edge of the entire PCB board. In this case, PCB suppliers usually use the NPTH hole (Non-Platting Through Hole, that is, non-plating hole) in the PCB veneer as the positioning hole. However, NPTH holes are not designed in many PCB boards (for example, PCB boards of HDI mobile phones). In this regard, the following methods are usually used to implement fixation.

1. Use the PTH hole (Platting Though Hole, that is, the plating hole) in the board as the positioning hole. Using this method, it is easy to cause problems such as straining the hole wall, scratching the pad, and breaking the hole copper when the board is going up and down.

2. Use adhesive tape to fix. Using this method, residual glue will be left on the board, affecting the welding surface, and there are problems such as unstable dimensional control, easy out-of-tolerance, and low production efficiency.

3. Use the mold to fix. Using this method, it is easy to have multiple or missing gongs, and there are problems such as unstable dimensional control, easy out-of-tolerance, and low product yield.

In addition, a CNC gong plate production method is disclosed in Chinese patent application CN201110337321.7. The method is to first cut the entire working plate into a plurality of single PCS plates, and then select at least one of the NPTH grooves distributed on the single PCS plates. The 4 slot corners are used as positioning holes for the gong board. Since this method requires at least four NPTH groove corners on a single PCS board, there are certain limitations in practical applications.

Contents of the invention

In order to solve the above problems, the present invention provides a gong board method for printed circuit boards.

The gong plate method of printed circuit board provided by the present invention comprises:

Provide a whole printed circuit board to be processed, the whole printed circuit board includes at least 2 printed circuit boards, a primary waste area and a secondary waste area, the secondary waste area At least a part of the waste area is located between adjacent printed circuit boards, and at least a part of the primary gong-shaped waste area is located at the edge of the entire printed circuit board;

A first positioning member is provided in the area between adjacent printed circuit boards in the secondary gong-shaped waste area, and the number of the first positioning members is at least two;

In the case of using the first positioning member to fix the entire printed circuit board, use a cutting machine to perform a first-time molding, and remove the first-time-shaped waste area;

A second positioning member is provided outside the edge of the printed circuit veneer formed by a gong shape, the outer edge of the second positioning member is tangent to the edge of the printed circuit veneer, and the second positioning The number of pieces is at least 2;

In the case of using the second positioning member to fix the remaining part of the entire printed circuit board formed after the primary gong shape, a gong machine is used to perform a secondary gong shape, and the secondary gong shape waste is District gong removal.

Wherein, the entire printed circuit board further includes connecting edges between adjacent printed circuit boards.

Wherein, the process of setting the first positioning member includes:

Opening a first positioning hole in the area between adjacent printed circuit veneers in the secondary gong-shaped waste area;

The first positioning piece is passed through the first positioning hole and fixed on the fixing piece, and the fixing piece is fixed on the gong machine or detachably fixed on the gong machine.

Wherein, the process of setting the second positioning member includes: fixing the second positioning member to the fixing member.

Wherein, the diameter of the first positioning hole is greater than or equal to 1.5 mm, preferably 2.0-3.0 mm.

Wherein, while opening the first positioning hole, other holes are opened on the printed circuit board.

Wherein, the number of the first positioning members is 3 or 4.

Wherein, the first positioning members are not on the same straight line.

Wherein, the second positioning member is arranged at the groove on the edge of the printed circuit board formed by a gong shape.

Wherein, three edges of at least one printed circuit board are formed by one gong.

Wherein, the secondary gong-shaped waste area is entirely located between adjacent printed circuit boards.

Wherein, before the second gong shape, the first positioning member is removed.

Wherein, the printed circuit boards are arranged in an m×n array in the entire printed circuit board, m and n are integers greater than or equal to 1, and the product of m and n is greater than or equal to 2.

Wherein, the gong machine is a numerically controlled gong machine, and the gong machine is executed once by pre-inputting parameters and/or programs related to the primary gong-shaped waste area and the secondary gong-shaped waste area in the gong machine Gong type and secondary gong type.

The present invention has following beneficial effect:

The present invention adopts the step-by-step method of internal fixation, external gong type, external fixation, and internal gong type in sequence, and fixes by rationally utilizing the area between PCB veneers and the board edge formed after one gong type, It is possible to perform gong board on the entire PCB board that cannot be provided with positioning holes on the edge of the board, and there is no suitable positioning hole in the board; correspondingly, since the size of the edge of the board can be reduced during design, the utilization rate of the board is improved , which reduces the production cost; in the process of the first gong and the second gong, the board can be firmly fixed, so the dimensional control of the gong is stable, the size is accurate, and there is no out-of-tolerance, avoiding the problem of multiple gongs and missing gongs In addition, the method is simple to implement and has high production efficiency.

Description of drawings

Fig. 1 is the schematic diagram of the whole PCB board being processed according to an exemplary embodiment of the present invention, wherein a first positioning hole is provided in the secondary gong-shaped waste area;

Fig. 2 is the schematic diagram of the PCB connecting plate being processed according to an exemplary embodiment of the present invention, wherein a second positioning member is arranged at the outer edge of each PCB single board, and the secondary waste area is removed;

FIG. 3 is a schematic diagram of a processed PCB connector according to an exemplary embodiment of the present invention.

Detailed ways

In order to enable those skilled in the art to better understand the technical solution of the present invention, an exemplary embodiment of the PCB board gong board method provided by the present invention will be described in detail below with reference to the accompanying drawings. In the following descriptions, the terms "upper", "lower", "left", and "right" indicate the directions shown in the drawings; in addition, in the present invention, the term "adjacent" can mean adjacent up and down or left and right , can also represent adjacent along the diagonal direction.

Fig. 1 is a schematic diagram according to an exemplary embodiment of the present invention. The gong machine (not shown) in this embodiment adopts CNC Routing, that is, the path of the gong knife is input into the gong machine through the program in advance, and the gong machine controls the gong knife according to the program, and performs the gong shape according to the predetermined path. In this embodiment, for the entire PCB board 1 that has been produced in the production line, the PCB connecting board is processed by two gong-shaped methods.

Firstly, a PCB connection area, a primary gong-shaped waste area 3 and a secondary gong-shaped waste area 4-1, 4-2 are designed on the entire PCB board 1 . Among them, the PCB connection area includes a plurality of PCB single boards 2-1, 2-2, 2-3 printed on the entire PCB board 1 (a total of 6 PCB single boards in two rows and three columns are shown in Figure 1) And the connecting edges 6-1 and 6-2 between adjacent PCB single boards (7 connecting edges are shown in FIG. 1 ). The secondary gong-shaped waste areas 4-1 and 4-2 (four secondary gong-shaped waste areas are shown in FIG. 1 ) are located between adjacent PCB single boards. Secondary gong-shaped waste areas 4-1, 4-2 are limited by the path of the gong cutter during the secondary gong-shaped. The primary gong-shaped waste area 3 is the area on the entire PCB 1 except for the PCB connection area and the secondary gong-shaped waste areas 4-1 and 4-2. The primary gong-shaped waste area 3 is defined by the path passed by the gong knife during the primary gong shape (ie the thick solid line in FIG. 1 ) and the outer edge of the entire PCB 1 . The connection edges 6 - 1 , 6 - 2 can be located between the secondary waste areas 4 - 1 , 4 - 2 and/or between the secondary waste area 4 - 1 and the primary waste area 3 .

Secondly, set a plurality of first positioning holes 5-1, 5-2, 5-3 in the secondary gong-shaped waste area on the whole PCB board 1, and utilize the first positioning piece to pass through the positioning holes 5-1, 5-3. 2. 5-3 Fix the whole PCB board 1 to the gong machine. Wherein, the first positioning holes 5-1, 5-2, 5-3 may be NPTH holes manufactured by drilling, punching and other methods. The diameter of the first positioning holes 5-1, 5-2, 5-3 is preferably greater than or equal to 1.5 mm, more preferably 2.0-3.0 mm. The number of the first positioning holes 5-1, 5-2, 5-3 is at least 2, preferably 3 or 4, most preferably 4. As shown in Fig. 1, the first positioning holes 5-1, 5-2, 5-3 are preferably respectively located in unconnected secondary gong-shaped waste areas. Also as shown in Figure 1, if the number of the first positioning holes 5-1, 5-2, 5-3 is more than 2, each of the first positioning holes 5-1, 5-2, 5-3 is preferably not are on the same straight line, but are appropriately staggered from each other, so as to improve the fixing effect, and correspondingly, the first positioning members are not on the same straight line. In this embodiment, the first positioning hole 5-3 is located between the two adjacent PCB single boards 2-2, 2-3 up and down, however, the first positioning hole can also be located between the two adjacent left and right PCB single boards. between the boards 2-1 and 2-2 (for example, located below the connecting edge 6-2), or between two adjacent PCB single boards 2-1 and 2-3 arranged along a diagonal. The number and shape of the first positioning pieces correspond to the number and shape of the first positioning holes. The first positioning member may be a positioning nail (PIN nail), a positioning pin, a positioning bolt, or the like. Each first positioning piece is inserted, nailed or screwed into the corresponding first positioning hole, and the bottom of each first positioning piece is nailed or screwed into a fixed worktable (not shown) on the gong machine. Alternatively, the entire PCB board 1 may be fixed on a fixed backing plate (not shown) through the first positioning member first, and then the fixing backing plate is fixed on the gong machine. In addition, if the material of the PCB board allows, the punching and nailing process can be completed in one step using the Pinning Maching machine commonly used in the PCB industry. In addition, if holes need to be drilled on the PCB single board, the holes in the board can be made at the same time as the first positioning hole is opened, instead of being drilled separately.

Then, perform a gong shape with a gong machine, and remove the primary gong shape waste area 3 gongs. That is, through the predetermined parameters and/or programs input into the gong machine, the gong knife is controlled to travel along the path indicated by the thick solid line in FIG. 1 . Since the entire PCB board 1 is firmly fixed on the gong machine or the fixing piece through the positioning holes 5-1, 5-2, 5-3 and the locating piece, there will be no board shifting during the whole gong-shaped process. Therefore, the size control of the gong is stable, the size is accurate, and there is no out-of-tolerance. In addition, since the positioning holes 5-1, 5-2, 5-3 are located in the secondary gong-shaped waste areas 4-1, 4-2 between adjacent PCB single boards, during the entire primary gong-shaped process, There will be no interference between the gong knife and the positioning part. Preferably, the primary waste area 3 that is removed by the primary discharge includes three sides or a part of the three sides of the PCB veneer 2-1, 2-2, 2-3 (for example, includes the PCB veneer 2-1 part of the left and right sides and the upper side of the PCB single board 2-2, including a part of the left side, the upper side and the right side of the PCB single board 2-2). In other words, part or all of the three sides or a part of the three sides of the PCB are formed through one gong.

As shown in Figure 2, after a gong shape, on the outside of the edge of the PCB connection area (that is, the path passed by the gong knife during a gong shape), next to the PCB single boards 2-1, 2-2, 2 Several second positioning members 7 are fixed at the edge of -3, in other words, the outer edge of the second positioning member 7 is tangent to the edge of the PCB single board. If a groove is formed on the edge of the PCB single board 2-1, 2-2, 2-3 after a gong, the second positioning member 7 is preferably located at the groove, so as to improve the fixing effect. The number of the second positioning pieces 7 is at least 2, preferably more than 4 (36 second positioning pieces 7 are shown in FIG. 2 ). And in order to better implement the fixation, it is preferable to set the second positioning member 7 beside each edge of each PCB veneer that has been punched out. Since the PCB connection area (each PCB single board) is fixed on the fixed backing plate or the worktable of the gong machine at this time, the second installation hole can be opened at the corresponding position on the fixed backing plate or the worktable, and then the The second positioning member 7 is fixed in the second installation hole, however, since the fixed backing plate is generally soft, the process of opening the second installation hole can be omitted. For example, a PIN machine can be directly used to punch positioning nails to set the second positioning member.

Next, perform the secondary molding with a drilling machine, and remove the waste area 3 of each secondary molding. That is, the gong knife is controlled to travel along the path indicated by the thick solid line in FIG. 2 . Since each secondary-shaped waste area 3 is removed sequentially, the first positioning member originally located in the secondary-shaped waste area 3 will gradually lose its fixing effect. Therefore, through the second positioning member 7, the entire PCB connecting board and each PCB single board are still firmly fixed, so the secondary gong shape still maintains the advantages of stable size control, precise size, and no out-of-tolerance. Through the secondary gong shape, not only the individual PCB boards 2-1, 2-2, 2-3 are formed, but also the connection edges 6-1, 6-2 between the PCB boards are formed. Finally, each second positioning member 7 is removed from the gong machine or the fixed backing plate to obtain a shippable PCB connection board as shown in FIG. 3 .

It can be understood that the above embodiments are only exemplary embodiments adopted to illustrate the principle of the present invention, but the present invention is not limited thereto.

In the above exemplary embodiments, the primary gong-shaped waste area 3 includes three sides or a part of the three sides of the PCB single boards 2-1, 2-2. However, it can be understood that the primary gong-shaped waste area can also only include one side, two sides, or a part of one side or two sides of the PCB single board. Correspondingly, the secondary gong-shaped waste area can not only include adjacent The area between the PCB boards also includes some areas located on the edge of the entire PCB board. In addition, the primary gong-shaped waste area may contain a part of the fourth side of the PCB veneer, for example, in the above exemplary embodiment, the primary gong-shaped waste area 3 may be extended to include area 4-2, in which case For example, the positioning hole 5-3 can be set at a position symmetrical to the positioning hole 5-2 at the right part of the secondary gong-shaped waste area 4-1.

In the above-mentioned exemplary embodiment, the four sides of the whole PCB board are removed by one gong type, however, it can be understood that if a part of the four sides of the whole PCB board is used as a part of the edge of the PCB single board or the PCB connecting board , then the one-shot pattern can also only remove the corresponding part of the board edge of the whole PCB board. In addition, a gong shape can be completed at one time, or it can be completed in multiple times. In order to facilitate the knife feeding, the starting point and/or end point of the gong knife can be located at the edge of the whole PCB board in a gong shape.

In addition, it can be understood that the primary type and the secondary type can be alternately performed, that is, part of the primary type waste area is removed, the second positioning member is fixed at the edge of the corresponding PCB board, and then the corresponding part of the secondary type is removed. Secondary waste area, and then remove another part of primary waste area...with this cycle.

In the above exemplary embodiments, the second positioning member is located at the groove on the edge of the PCB. However, it can be understood that even if the edge of the PCB board does not have a groove, it can also be fixed by fixing an appropriate number of second positioning pieces beside the upper, lower, left and right edges of the entire PCB connecting board.

In the above exemplary embodiments, the first positioning member is not removed before the secondary gong. However, it can be understood that, for example, if the secondary gong-shaped waste area is narrow, the gong cutter may interfere with the first positioning member during the secondary gong-shaped process. Therefore, the second gong can also be performed after the first positioning member is removed.

In the above exemplary embodiments, the PCB connectors manufactured are in two rows and three columns. However, the PCB connectors can also have other layout structures, such as four rows and one column, three rows and four columns, etc., as long as the PCB single board The quantity is 2 or more, and it is enough to leave enough area for setting at least 2 positioning holes in the whole PCB board.

In the above exemplary embodiments, a PCB connecting board with connection edges is manufactured by using a whole PCB board. However, the present invention can also be applied to the situation that a whole PCB board is used to manufacture multiple PCB connecting boards and/or multiple PCB single boards. For the case of manufacturing multiple PCB single boards, the entire PCB board may only include the PCB single board, the primary gong-shaped waste area and the secondary gong-shaped waste area without the connection edge. In addition, based on the presence or absence of connecting edges, the arrangement of PCB boards, and the optimization of the travel path of the gong cutter, the number of primary gong-shaped waste areas and secondary gong-shaped waste areas can be one or more.

In the above exemplary embodiments, both the primary gong type and the secondary gong type are executed by the same gong machine. However, it can be understood that the primary gong type and the secondary gong type can be performed by different gong machines. For example, the entire PCB board can be fixed to the fixed backing plate through the first locating piece, and the fixed backing plate is fixed on the first gong machine during the first gong type, and the second locating piece is also fixed on the second gong type before the second gong type. Be fixed on this fixed backing plate, and this fixed backing plate is fixed on the second gong machine.

In the above exemplary embodiments, the numerical control gong machine is used for the gong plate, and the path parameters of the primary gong type and the secondary gong type are input into the gong machine in advance. However, the present invention can also be implemented using a semi-automatic gong machine, a manual gong machine or a semi-automatic milling machine or a manual milling machine. In addition, the path of the gong knife in the above exemplary embodiments does not need to be pre-set or pre-marked on the entire PCB, but can be directly shaped according to the shape of the PCB single board or the PCB connection board.

In addition, it can be understood that for the case of using a numerically controlled gong machine, the parameters and programs of the two positioning and two gong shapes can be provided to the gong type process (for example, in the form of drawings), and the gong type process follows Programs, drawings, etc. automatically execute each positioning and gong-shaped process.

For those skilled in the art, other variations and improvements can be made without departing from the spirit and essence of the present invention, and these variations and improvements are also considered as the protection scope of the present invention.

Claims (15)

1. a gong board method for printed circuit board, is characterized in that, described gong board method comprises: Provide a whole printed circuit board to be processed, the whole printed circuit board includes at least 2 printed circuit boards, a primary waste area and a secondary waste area, the secondary waste area At least a part of the waste area is located between adjacent printed circuit boards, and at least a part of the primary gong-shaped waste area is located at the edge of the entire printed circuit board; A first positioning member is provided in the area between adjacent printed circuit boards in the secondary gong-shaped waste area, and the number of the first positioning members is at least two; In the case of using the first positioning member to fix the entire printed circuit board, use a cutting machine to perform a first-time molding, and remove the first-time-shaped waste area; A second positioning member is provided outside the edge of the printed circuit veneer formed by a gong shape, the outer edge of the second positioning member is tangent to the edge of the printed circuit veneer, and the second positioning The number of pieces is at least 2; In the case of using the second positioning member to fix the remaining part of the entire printed circuit board formed after the primary gong shape, a gong machine is used to perform a secondary gong shape, and the secondary gong shape waste is District gong removal. 2. The method according to claim 1, wherein the entire printed circuit board further comprises connecting edges between adjacent printed circuit boards. 3. The method according to claim 1, wherein the process of setting the first positioning member comprises: Opening a first positioning hole in the area between adjacent printed circuit veneers in the secondary gong-shaped waste area; The first positioning piece is passed through the first positioning hole and fixed on the fixing piece, and the fixing piece is fixed on the gong machine or detachably fixed on the gong machine. 4. The method according to claim 3, wherein the process of setting the second positioning member comprises: Fix the second positioning piece to the fixing piece. 5. The method according to claim 3, wherein a diameter of the first positioning hole is greater than or equal to 1.5 mm. 6. The method according to claim 5, characterized in that, the diameter of the first positioning hole is 2.0-3.0 mm. 7. The method according to claim 3, characterized in that, while opening the first positioning hole, other holes are opened on the printed circuit board. 8. The method according to any one of claims 1 to 7, wherein the number of the first positioning members is 3 or 4. 9. The method of claim 8, wherein the first positioning members are not on the same straight line. 10. The method according to any one of claims 1 to 7, characterized in that, the second positioning member is arranged at a groove on the edge of the printed wiring veneer formed by a single gong. 11. The method according to any one of claims 1 to 7, characterized in that three edges of at least one printed wiring board are formed by one gong. 12. The method according to any one of claims 1 to 7, wherein the secondary gong-shaped waste area is entirely located between adjacent printed wiring boards. 13. A method as claimed in any one of claims 1 to 7, characterized in that the first retainer is removed prior to the secondary gong. 14. The method according to any one of claims 1 to 7, wherein the printed circuit boards are arranged in an m×n array in the entire printed circuit board, and m and n are respectively is an integer greater than or equal to 1, and the product of m and n is greater than or equal to 2. 15. The method according to any one of claims 1 to 7, characterized in that, the gong machine is a numerically controlled gong machine, and the gong machine is pre-input into the gong machine and the primary gong-shaped waste area and the parameters and/or procedures associated with the secondary type waste area to execute the primary type and the secondary type.