阅读说明：本技术 一种线路板无铜孔检测工具及检测方法 (Detection tool and detection method for copper-free hole of circuit board ) 是由 王文剑 于 2020-05-15 设计创作，主要内容包括：本发明公开了一种线路板无铜孔检测工具及检测方法,根据线路板无铜孔结构,设计包括固定座、第一铜层、检测架、第二铜层、检测针、第一导线、第二导线、检测系统的检测工具,第一铜层附着在固定座上,检测架位于第一铜层上方,检测架底面朝向第一铜层,第二铜层固定安装在检测架的顶面上,检测针贯穿式固定在检测架内部,检测针一端为固定端,检测针另一端为检测端,检测端的外露部分外露于检测架的底面；利用检测工具,将待检测线路板叠层对位放置于第一铜层上,将线路板无铜孔与检测针一一对应,将检测架降下,检测针的外露部分穿过线路板无铜孔与第一铜层接触；实现线路板无铜孔的自动化检测,节约人工,提升检测效率和品质。(The invention discloses a detection tool and a detection method for a copper-free hole of a circuit board, wherein the detection tool comprises a fixed seat, a first copper layer, a detection frame, a second copper layer, a detection needle, a first lead, a second lead and a detection system is designed according to the copper-free hole structure of the circuit board, the first copper layer is attached to the fixed seat, the detection frame is positioned above the first copper layer, the bottom surface of the detection frame faces towards the first copper layer, the second copper layer is fixedly arranged on the top surface of the detection frame, the detection needle is penetratively fixed inside the detection frame, one end of the detection needle is a fixed end, the other end of the detection needle is a detection end, and the exposed part of the detection end is exposed out of the bottom surface; the circuit board to be detected is placed on the first copper layer in a laminated contraposition mode by using a detection tool, the copper-free holes of the circuit board are in one-to-one correspondence with the detection pins, the detection frame is lowered, and the exposed parts of the detection pins penetrate through the copper-free holes of the circuit board to be contacted with the first copper layer; the automatic detection of the circuit board without the copper hole is realized, the labor is saved, and the detection efficiency and the quality are improved.)

1. The utility model provides a circuit board does not have copper hole and detects instrument which characterized in that includes:

according to waiting to detect circuit board no copper hole pattern structure, make detection instrument, detection instrument includes: the device comprises a fixed seat, a first copper layer, a detection frame, a second copper layer, a detection pin, a first lead, a second lead and a detection system;

the first copper layer is attached to the fixed seat;

the detection frame is positioned above the first copper layer at a certain distance, and comprises a top surface and a bottom surface, wherein the bottom surface faces the first copper layer;

the second copper layer is fixedly arranged on the top surface of the detection frame;

the detection needle is fixed in the detection frame in a penetrating mode, one end of the detection needle is a fixed end and is electrically connected with the second copper layer, the other end of the detection needle is a detection end, the detection end comprises an exposed part, and the exposed part is exposed on the bottom surface of the detection frame.

2. The tool of claim 1, wherein one end of the first wire is electrically connected to the first copper layer, and the other end of the first wire is electrically connected to the detection system; one end of the second lead is electrically connected with the second copper layer, and the other end of the second lead is electrically connected with the detection system; the detection system is used for controlling the detection process and displaying the detection result.

3. The tool of claim 1, wherein the testing frame is capable of moving vertically with respect to the first copper layer within a range of 0cm to 30 cm.

4. The tool of claim 1, wherein the holder is made of a hard insulating material.

5. The tool for detecting the copper-free hole of the circuit board according to claim 1, wherein the detection frame is made of one or more materials selected from a wood board, a plastic board, a rubber board, an epoxy resin glass fiber board, a teflon board and a ceramic board.

6. The tool of claim 1, wherein the number and distribution of the detection pins and the number and distribution of the copper-free holes of the circuit board are in one-to-one correspondence.

7. The tool for detecting the copper-free hole of the circuit board according to claim 1, wherein the length of the exposed part of the detection end is 0.5mm to 3.0mm larger than the thickness of the circuit board to be detected.

8. A circuit board copper hole-free detection method is characterized in that a circuit board to be detected is detected by using the circuit board copper hole-free detection tool of claim 1, more than or equal to 1 circuit board to be detected is placed on the first copper layer in a laminated contraposition mode, the circuit board copper hole-free holes correspond to the detection pins in a one-to-one mode, the detection frame is lowered, and the exposed parts of the detection pins penetrate through the circuit board copper hole-free holes to be in contact with the first copper layer.

9. The method of claim 8, wherein the exposed portion passes through the copper-free hole to contact the first copper layer, the exposed portion passes through the second copper layer and the second conductive line, and the first copper layer passes through the first conductive line, thereby forming a complete circuit loop in the inspection system, and the inspection system displays a copper-free hole qualification flag at a corresponding position.

10. The method of claim 8, wherein the exposed portion is interfered by the hole without copper hole and cannot smoothly contact the first copper layer, the exposed portion cannot effectively pass through the second copper layer, the second wire, the first copper layer and the first wire, a complete circuit loop is formed in the detection system, and the detection system displays the unqualified mark without copper hole at the corresponding position.

Technical Field

The invention relates to the field of circuit board production and processing, in particular to a copper-hole-free detection tool and a detection method for a circuit board.

Background

The Circuit Board, also known as a Printed Circuit Board (PCB), is an important basic electronic component, is a support for electronic components and a carrier for electrical connection, and is widely used in the field of various electronic products.

The individual circuit boards in the circuit board panels are called unit boards, and the large board formed by the unit board panels is called a PNL board. The unit plates with smaller sizes are spliced into the PNL plate with larger size, the PNL comprises a plurality of unit plates, if the unit plates comprise a plurality of copper-free holes, the number of the copper-free holes contained in the whole PNL plate is larger, and the detection difficulty of the copper-free holes is multiplied. As shown in fig. 1.

When the PNL plate comprises more copper-free holes, if the copper-free holes are smaller and the tolerance requirement is higher (for example, the hole diameter is less than or equal to 1.0mm, and the tolerance requirement is +/-0.05 mm), the drilling needles or punching knives can generate heat in the drilling or punching process due to the fact that the number of the drilled holes or punched holes is large, the quality of the holes is affected, and the problems of copper slag in the holes, irregular hole shapes and the like are easily caused.

At present, after the copper-free hole is manufactured, the detection is generally carried out by adopting a visual inspection mode. The visual inspection method mainly has the following problems:

(1) when the number of the copper-free holes of the PNL plate is large, the visual fatigue problem is prominent along with the increase of visual inspection time, and the visual inspection effect is rapidly reduced;

(2) visual inspection has large harm to the eyesight of people, low visual inspection efficiency, high omission factor, more people required for visual inspection and high labor cost;

(3) visual inspection has poor control effect on the problem of no copper hole, the problems of copper slag, semi-through holes and the like in the hole are difficult to detect, and the omission factor is high.

Disclosure of Invention

The invention provides a detection tool and a detection method for a copper-free hole of a circuit board, which can realize the instrumental detection of the copper-free hole, avoid the problem of missed detection of the copper-free hole and improve the detection efficiency and quality of the copper-free hole.

The invention provides a detection tool for a copper-free hole of a circuit board, which comprises: according to waiting to detect circuit board no copper hole pattern structure, the preparation detection instrument includes: the device comprises a fixed seat, a first copper layer, a detection frame, a second copper layer, a detection pin, a first lead, a second lead and a detection system;

the first copper layer is attached to the fixed seat;

the detection frame is positioned above the first copper layer at a certain distance, and comprises a top surface and a bottom surface, wherein the bottom surface faces the first copper layer;

the second copper layer is fixedly arranged on the top surface of the detection frame;

the detection needle is fixed in the detection frame in a penetrating mode, one end of the detection needle is a fixed end and is electrically connected with the second copper layer, the other end of the detection needle is a detection end, the detection end comprises an exposed part, and the exposed part is exposed on the bottom surface of the detection frame.

Furthermore, one end of the first lead is electrically connected with the first copper layer, and the other end of the first lead is electrically connected with the detection system; one end of the second lead is electrically connected with the second copper layer, and the other end of the second lead is electrically connected with the detection system; the detection system is used for controlling the detection process and displaying the detection result.

Furthermore, the detection frame can vertically lift relative to the first copper layer, and the lifting range is 0 cm-30 cm;

further, the fixing seat is made of hard insulating materials.

Furthermore, the detection frame is made of one or more materials of a wood plate, a plastic plate, a rubber plate, an epoxy resin glass fiber plate, a teflon plate and a ceramic plate.

Furthermore, the number and the distribution of the detection pins correspond to the number and the distribution of the copper-free holes of the circuit board one by one.

Furthermore, the length of the exposed part of the detection end is 0.5 mm-3.0 mm larger than the thickness of the circuit board lamination to be detected.

The embodiment of the detection tool for the copper-free hole of the circuit board provided by the invention designs and manufactures the detection tool for the copper-free hole according to the pattern structure of the copper-free hole of the circuit board, adopts a basic design mode of circuit connection of a loop, designs a first copper layer, a detection needle, a second copper layer, a first lead, a second lead and a detection system structure which can form the loop, fixes the circuit board to be detected by using a fixed seat, fixes the detection needle by using a detection frame which can move up and down, drives the detection needle to move, can align to and penetrate the copper-free hole for detection, realizes automatic operation of detection and result feedback by using the detection system, and can realize full-flow automatic detection of the copper-free hole of the circuit board by using the integral detection tool, thereby effectively saving labor and improving the detection efficiency and quality.

The invention also provides a circuit board copper hole-free detection method, which is characterized in that the circuit board to be detected is detected by using the circuit board copper hole-free detection tool, more than or equal to 1 circuit board to be detected is placed on the first copper layer in a laminated contraposition mode, the circuit board copper hole-free holes correspond to the detection pins one by one, the detection frame is lowered, and the exposed parts of the detection pins penetrate through the circuit board copper hole-free holes to be in contact with the first copper layer.

Further, when no copper hole of the circuit board is unobstructed, the exposed part penetrates through the no copper hole to contact the first copper layer, the exposed part passes through the second copper layer and the second lead, and the first copper layer passes through the first lead to form a complete circuit loop in the detection system, and the detection system displays a qualified no copper hole mark at a corresponding position.

Further, when the circuit board is not smooth without the copper hole, the exposed part is interfered by the copper hole and cannot smoothly contact the first copper layer, the exposed part cannot effectively pass through the second copper layer, the second lead, the first copper layer and the first lead, a complete circuit loop is formed in the detection system, and the detection system displays that the copper hole at the corresponding position is unqualified.

The invention provides a circuit board copper hole-free detection method, which is characterized in that a circuit board to be detected is placed on a first copper layer according to the manufacture of a circuit board copper hole-free detection tool, detection pins are driven to move up and down by the up-and-down movement of a detection frame, the detection pins correspond to the circuit board copper hole-free holes to be detected one by one, the exposed parts of the detection pins can penetrate through the copper hole-free holes to be connected with the first copper layer, and a loop electric connection is formed at a detection system by the first copper layer, a first lead, a second copper layer and a second lead, so that the detection and result feedback of the detection system to the copper hole-free holes are realized, the operability of the detection tool is combined, the instrumental quality detection and batch detection of the circuit board copper hole-free holes can be realized, and the type and the position of the problem in the copper hole.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of a circuit board panel according to the background of the invention;

fig. 2 is a schematic structural diagram of a detection tool for detecting a copper-free hole of a circuit board according to an embodiment of the present invention.

Reference numerals:

10. the PNL board, 11, the unit board, 20, the copper-free hole, 30, the fixing seat, 31, the first copper layer, 32, the detection frame, 33, the second copper layer, 34, the detection pin, 35, the first lead, 36, the second lead, 37 and the detection system.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

Referring to fig. 1, which is a schematic diagram of a circuit board splicing board in the background art of the present invention, as shown in the figure, the PNL board (10) is formed by splicing 8 unit boards (11) into 1 PNL board (10), each unit board (11) has 4 copper-free holes (20), and the PNL board (10) contains 32 copper-free holes (20).

Referring to fig. 2, a schematic structural diagram of a detection tool for a circuit board without a copper hole according to an embodiment of the present invention is shown in the drawing, where the detection tool is manufactured according to a pattern structure of a circuit board to be detected without a copper hole (20), and includes: the device comprises a fixed seat (30), a first copper layer (31), a detection frame (32), a second copper layer (33), a detection pin (34), a first lead (35), a second lead (36) and a detection system (37);

the first copper layer (31) is attached to the fixed seat (30);

the test frame (32) is located above the first copper layer (31) at a distance, the test frame (32) comprising a top surface and a bottom surface, the bottom surface facing the first copper layer (31);

the second copper layer (33) is fixedly arranged on the top surface of the detection frame (32);

the detection pin (34) is fixed in the penetrating mode inside the detection frame (32), one end of the detection pin (34) is a fixed end (30) and is electrically connected with the second copper layer (33), the other end of the detection pin (34) is a detection end, the detection end comprises an exposed part, and the exposed part is exposed on the bottom surface of the detection frame (32).

As an alternative, one end of the first conducting wire (35) is electrically connected with the first copper layer (31), and the other end is electrically connected with the detection system (37); one end of the second lead (36) is electrically connected with the second copper layer (33), and the other end of the second lead is electrically connected with the detection system (37); the detection system (37) is used for controlling the detection process and displaying the detection result.

As an optional mode, the detection frame (32) can vertically lift relative to the first copper layer (31), and the lifting range is 0 cm-30 cm;

alternatively, the holder (30) is made of a hard insulating material.

As an optional mode, the detection frame (32) is made of one or more materials of a wood plate, a plastic plate, a rubber plate, an epoxy resin glass fiber plate, a teflon plate and a ceramic plate.

As an alternative mode, the number and the distribution of the detection pins (34) correspond to the number and the distribution of the copper-free holes (20) of the circuit board in a one-to-one mode.

As an optional mode, the length of the exposed part of the detection end is 0.5mm to 3.0mm greater than the thickness of the circuit board lamination to be detected.

The embodiment of the detection tool for the copper-free hole of the circuit board utilizes the basic circuit electric connection and the up-and-down movement requirement of the detection frame (32) in the detection process, and designs and manufactures the detection tool which can form the circuit electric connection and can carry out movable detection on the detection frame (32).

The embodiment of the invention also provides a method for detecting the copper-free hole of the circuit board, which comprises the following steps: the detection tool for detecting the copper-free holes of the circuit board is used for detecting the circuit board to be detected, more than or equal to 1 circuit board to be detected is placed on the first copper layer (31) in a laminated contraposition mode, the copper-free holes (20) of the circuit board are in one-to-one correspondence with the detection pins (34), the detection frame (32) is lowered, and the exposed parts of the detection pins (34) penetrate through the copper-free holes (20) of the circuit board to be detected to be in contact with the first copper layer (31).

As an alternative, when the circuit board is good in a copper-free hole, the exposed part of the detection pin (34) can be connected to the first copper layer (31) through the copper-free hole (20), the exposed part passes through the second copper layer (33) and the second conducting wire (36), and the first copper layer (31) passes through the first conducting wire (35), a circuit loop is formed in the detection system (37), and the detection system (37) displays the qualified mark of the copper-free hole (20) at the corresponding position.

Further, when the circuit board has a bad problem in the interior of the copper-free hole (20), the exposed part of the detection pin (34) is interfered by the copper-free hole (20) and cannot be in smooth contact with the first copper layer (31), the exposed part cannot effectively pass through the second copper layer (33), the second lead (36), the first copper layer (31) and the first lead (35), a circuit loop is formed in the detection system (37), and the detection system (37) displays the unqualified mark of the copper-free hole (20) at the corresponding position.

According to the circuit board copper-hole-free detection method, the problems of copper-hole-free plug holes, metal wires in holes, poor hole shapes, semi-through holes and the like can be detected by using the circuit board copper-hole-free detection tool according to the structure of the circuit board copper-hole-free and the problem type of the copper-hole-free, so that the instrumental and automatic operation of copper-hole-free detection is realized, the labor is effectively saved, the visual injury to personnel is avoided, and the detection efficiency and the detection quality are improved.

While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.