A PCB drilling quality control method

Abstract

The present application relates to the technical field of PCB production, and particularly relates to a PCB drilling quality control method. The PCB drilling quality control method comprises the following steps: S1. adding a test plate on the PCB; S2. writing a drilling test hole processing program on a numerical control encoder, when each drill bit finishes drilling holes on the PCB, the processing program controls the drilling machine equipment to drill a test hole on the test plate, and the PCB and the test hole are marked; when the PCB finishes drilling, the test plate is separated from the PCB; if the PCB has quality problems, the test hole is traced, the test hole is analyzed to exclude the PCB problems; or if the test holes on the test plate are all qualified, it is judged that the drilling holes on the PCB are qualified. The PCB drilling quality control method can quickly locate the maximum hole limit of each drill bit, is beneficial to quickly excluding the quality problems of the drill bit PCB, and can quickly judge the quality of the PCB.

Description

Technical Field

[0001] This invention relates to the field of PCB manufacturing technology, specifically to a method for controlling the drilling quality of PCBs. Background Technology

[0002] Drilling is performed on a PCB board by using a drill bit. Because a PCB board is composed of different copper layers, epoxy resins, glass fiber, and fillers, it is inherently a non-uniform material. Drilling involves cutting into the PCB board with a drill bit, which is a cutting tool and will wear down. The wear condition corresponding to the first hole drilled by the drill bit is different from the wear condition corresponding to the hole drilled at the maximum lifespan of the drill bit (i.e., the maximum hole limit). Currently, the maximum hole limit is often used to evaluate the quality of drilling.

[0003] In practical applications, there are tens of thousands of holes inside a PCB board, while the lifespan of a drill bit is hundreds or thousands of holes. A single board with one drill bit diameter often requires dozens of drill bits. Existing technology makes it difficult to quickly trace the maximum hole limit of each drill bit. Therefore, it is difficult to find the maximum hole limit when assessing drilling quality, and the quality monitoring of the holes is inadequate. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a PCB board drilling quality control method. This PCB board drilling quality control method can quickly locate the maximum hole limit of each drill bit, which is conducive to quickly eliminating the quality problems of the drill bit PCB board and can quickly judge the quality of the PCB board.

[0005] To achieve one of the above objectives, the present invention provides the following technical solution:

[0006] A method for controlling the drilling quality of PCB boards is provided, including the following steps.

[0007] S1. Add a test board to the PCB board;

[0008] S2. Write a machining program for drilling test holes on a CNC encoder. After each drill bit finishes drilling a hole on the PCB board, the machining program controls the drilling equipment to drill an additional test hole on the test board and marks the PCB board and the test hole. After the PCB board is drilled, separate the test board from the PCB board.

[0009] If a quality problem occurs on the PCB board, trace the test hole and analyze the test hole to rule out PCB board problems.

[0010] Alternatively, it can determine whether all test holes on the test board are qualified. If all are qualified, the drill holes on the PCB board are qualified. If any are unqualified, the drill holes on the PCB board are unqualified.

[0011] In some implementations, the PCB extends outward to form the test board.

[0012] In some embodiments, the drilling equipment determines the coordinates of the first test hole on the test plate, and the remaining test holes are arranged in a matrix on the test plate.

[0013] In some implementations, the spacing between adjacent test holes is 1 mm.

[0014] In some implementations, the standard for each drill bit to complete drilling on the PCB board is: the drill bit has drilled the maximum hole limit or has drilled the end hole.

[0015] In some implementations, the test holes are marked by laser engraving codes on both the PCB board and the test board thereon.

[0016] In some implementations, the drill bit drills into the inner copper layer of the test board to form the test hole.

[0017] The beneficial effects of the PCB board drilling quality control method of the present invention are as follows:

[0018] (1) The PCB board drilling quality control method of the present invention adds a test board to the PCB board. When each drill bit finishes drilling, the processing program controls the drill bit to drill a test hole on the test board. The PCB board and the test hole are marked. The test board is eventually separated from the PCB board and stored. When the PCB board has a problem, the test board can be quickly located by the markings on the PCB board, and then the test hole on the test board can be located for analysis. At this time, it can be ruled out whether the problem is with the test hole. This facilitates quick and accurate location of the test hole and avoids the situation in the prior art where it is difficult to locate the test hole and thus difficult to rule out the PCB board drilling problem.

[0019] (2) The PCB board drilling quality control method of the present invention, since the maximum hole limit is the hole drilled when each drill bit wears out the most, only needs to determine whether the test hole on the test board is qualified, so as to quickly determine whether the drilling quality of the corresponding PCB board is qualified. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the arrangement of test holes on the test board of an embodiment.

[0021] Figure 2 This is a partial drilling program from an embodiment. Detailed Implementation

[0022] Preferred embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0023] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms “a” and “the” as used in this invention and the appended claims are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0024] It should be understood that although the terms "first," "second," "third," etc., may be used in this invention to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this invention, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] Example 1

[0026] Drilling is performed on a PCB board by using a drill bit. Because a PCB board is composed of different copper layers, epoxy resins, glass fiber, and fillers, it is inherently a non-uniform material. Drilling involves cutting into the PCB board with a drill bit, which is a cutting tool and will wear down. The wear condition corresponding to the first hole drilled by the drill bit is different from the wear condition corresponding to the hole drilled at the maximum lifespan of the drill bit (i.e., the maximum hole limit). Currently, the maximum hole limit is often used to evaluate the quality of drilling.

[0027] In practical applications, there are tens of thousands of holes inside a PCB board, while the lifespan of a drill bit is hundreds or thousands of holes. A single board with one drill bit diameter often requires dozens of drill bits. Existing technology makes it difficult to quickly trace the maximum hole limit of each drill bit. Therefore, it is difficult to find the maximum hole limit when assessing drilling quality, and the quality monitoring of the holes is inadequate.

[0028] To address this technical problem, the PCB board drilling quality control method disclosed in this embodiment includes the following steps:

[0029] S1. Add a test board to the PCB board;

[0030] S2. Write a machining program for drilling test holes on a CNC encoder. After each drill bit completes drilling on the PCB board, the machining program controls the drilling equipment to drill an additional test hole on the test board and marks the PCB board and the test hole. After drilling is completed on the PCB board, separate the test board from the PCB board.

[0031] If a quality problem occurs on the PCB board, trace the test hole and analyze it to rule out PCB board issues.

[0032] The aforementioned PCB drilling quality control method adds a test board to the PCB. After each drill bit completes its hole, the processing program controls the drill bit to drill a test hole on the test board. Both the PCB and the test hole are marked. The test board is eventually separated from the PCB and stored. When a problem occurs on the PCB, the markings on the PCB allow for quick location of the test board, and subsequently, the test holes on the test board can be located for analysis. This allows for the elimination of the test hole as the problem. This method facilitates quick and accurate location of the test holes, avoiding the difficulty in locating test holes and thus preventing the elimination of PCB drilling problems that is often difficult with existing technologies.

[0033] In this embodiment, a test block is set on the edge of the PCB board. When each tool reaches the end of its lifespan, a hole is drilled on the test block. In this way, the maximum hole limit of each tool can be found. The quality of the test holes on these test boards can be evaluated, which can represent the quality of the holes processed under the worst conditions in the PCB board. If the quality of the test holes is qualified, it proves that the quality of all holes in the board is qualified.

[0034] Example 2

[0035] For ease of understanding, the following is an example of a PCB board drilling quality control method, which will be used in practical applications:

[0036] The PCB extends outward to form the test board.

[0037] The PCB extends outward to form a test board, which connects the test board and the PCB as one unit, making it easier to quickly drill test holes later.

[0038] In this embodiment, the drilling equipment determines the coordinates of the first test hole on the test plate, and the remaining test holes are arranged in a matrix on the test plate.

[0039] like Figure 1-2 As shown, the test board measures 4*30mm, with a total of 5*31=155 test hole positions, which is sufficient for testing. The test board has a fixed size, a hole spacing of 1mm, and copper on each inner layer. The holes are arranged in sequence from Hole 1 to Hole 2, with 31 holes per row, for a total of 5 rows. For example, if the drilling life is 20 (actually it won't be that low), then... Figure 2After drilling the 20th hole on the PCB board (coordinates X10826Y188421), drill another test hole at the location of the first hole on the test block. Then, the drill picks up a drill bit that has not been used before and drills the 40th hole on the PCB board (coordinates X081232Y009759, the Y-axis is assumed to be the previous line's Y coordinate if no coordinate is specified). Then, drill another test hole at the location of the second hole on the test block, and so on, until all corresponding test holes on the PCB board are drilled. Preferably, the spacing between adjacent test holes is 1mm.

[0040] In this embodiment, the standard for each drill bit to complete drilling on the PCB board is: the drill bit has drilled the maximum hole limit, or it has drilled the tail hole (the last hole drilled).

[0041] Example 3

[0042] For ease of understanding, the following is an example of a PCB board drilling quality control method, which will be used in practical applications:

[0043] The test holes are marked by laser engraving codes on both the PCB board and the test board on it. When problems arise during use after the board is delivered to the customer, the test board can be located using the laser engraving codes. The test holes on the test board are then analyzed to determine if the problem is with the PCB board. This method helps narrow down the search for problems and saves a significant amount of scrap.

[0044] Example 4

[0045] For ease of understanding, the following is an example of a PCB board drilling quality control method, which will be used in practical applications:

[0046] The drill bit drills into the inner copper layer to form the test hole. The test hole extends into the inner copper layer for subsequent analysis.

[0047] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0048] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0049] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0050] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0051] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for controlling the drilling quality of PCB boards, characterized in that: Includes the following steps, S1. Add a test board to the PCB board; S2. Write a machining program for drilling test holes on a CNC encoder. After each drill bit finishes drilling a hole on the PCB board, the machining program controls the drilling equipment to drill an additional test hole on the test board and marks the PCB board and the test hole. After the PCB board is drilled, separate the test board from the PCB board. If a quality problem occurs on the PCB board, trace the test hole and analyze the test hole to rule out PCB board problems. Alternatively, it can determine whether all test holes on the test board are qualified. If all are qualified, the drill holes on the PCB board are qualified. If any are unqualified, the drill holes on the PCB board are unqualified.

2. The PCB board drilling quality control method according to claim 1, characterized in that: The PCB extends outward to form the test board.

3. The PCB board drilling quality control method according to claim 1, characterized in that: The drilling equipment determines the coordinates of the first test hole on the test plate, and the remaining test holes are arranged in a matrix on the test plate.

4. The PCB board drilling quality control method according to claim 3, characterized in that: The spacing between adjacent test holes is 1 mm.

5. The PCB board drilling quality control method according to claim 1, characterized in that: The standard for each drill bit to complete drilling on a PCB board is: the drill bit has drilled the maximum hole limit or the end hole.

6. The PCB board drilling quality control method according to claim 1, characterized in that: The test holes are marked by laser engraving codes on the test holes on the PCB board and the test board thereon.

7. The PCB board drilling quality control method according to claim 1, characterized in that: The drill bit drills into the inner copper layer of the test board to form the test hole.

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