CN1942058B - Method for inspecting hand-inserted element - Google Patents

Abstract

A method for inspecting a plurality of plug-in components is used for inspecting whether the shapes of the plug-in components inserted on a circuit board are correct, and comprises the following steps: inserting a hand-inserting element at a position corresponding to the surface of the circuit board; covering a cover plate on the surface of the circuit board, forming an opening in the cover plate corresponding to the position of the surface of the circuit board where the hand-plugging element is inserted, exposing the hand-plugging element, and checking whether the insertion form of the hand-plugging element inserted on the surface of the circuit board is correct by a user; the hand-inserted element inspection method of the invention mainly uses the cover plate to cover the circuit board, quickly, accurately and simply inspects whether the assembly of the elements connected on the surface of the circuit board is correct, namely, the cover plate inspects whether the elements on the surface of the circuit board have the problems of missing insertion, excessive insertion, deflection, opposite polarity and the like, prevents the elements from deflecting during welding operation, greatly improves the inspection accuracy and the working efficiency of the hand-inserted elements, and further increases the yield of finished products of the circuit board.

Description

Inspection method of hand-inserted components

technical field

The invention relates to an inspection technology for the insertion status of electronic components, in particular to a hand-inserted component inspection method that can conveniently inspect whether a plurality of hand-inserted components inserted in a circuit board have poor connection or the like.

Background technique

With the continuous vigorous development of science and technology, electronic products have been widely used in people's daily life. Therefore, the demand for circuit boards is also increasing. A printed circuit board (PCB) is an object with wires on an insulating substrate. According to specific requirements, various electronic components such as resistors, capacitors, diodes, transistors, sockets, interface components, etc. are loaded on it, and different functions are completed through the electrical connection of wires.

Now, the structure of the printed circuit board is becoming more and more complex, and in order to improve the overall function of the circuit board, the surface of the printed circuit board is often connected with a very large number of electronic components. At present, most of these components are chip components to realize the miniaturization of products. However, in order to meet the needs of different electrical designs, there are still many electronic components that need to be inserted manually on the surface of the printed circuit board, and in the The other surface of the circuit board is subjected to a soldering process to solder the electronic components to the circuit board.

Currently, when soldering electronic components on the printed circuit board, firstly, the components to be welded required by the circuit board are manually inserted at the corresponding positions on the surface of the circuit board, and then after the components are checked to be correct, the components for the circuit board are provided. A certain inclination angle (generally 5 to 8 degrees), and finally soldering operations can be performed on the other surface of the circuit board, such as wave soldering operations. , components that are inserted on the circuit board but not fixed will be skewed due to factors such as their own weight or wave soldering rail vibration. For example, if the component is an electrolytic capacitor, the electrolytic Capacitors will cause wireless tails due to skewing, which will affect the yield rate of the circuit board products. Even if a certain amount of repair work is taken, it will affect the progress and work efficiency of the work, and it will easily cause damage to the electrolytic capacitors. What's more, it will be damaged the circuit board.

Furthermore, there is currently a component inspection process in the welding operation, and the component inspection operation in the prior art relies on operators to implement it manually without using inspection tools. For example, based on the comparison with the circuit drawing or sample, the operator judges and checks whether the components of the circuit board to be soldered have problems such as multiple insertions, missing insertions, wrong insertions, and polarity reverse insertions, so as to prevent incorrect insertion of components from causing problems. The defect rate of finished circuit boards; however, this inspection method is not only time-consuming and laborious, but also very inconvenient and cumbersome, which seriously affects work efficiency. Moreover, operators are often fatigued or unable to concentrate due to factors such as the working environment, working time, and emotions. At present, there is no detection method on the Internet that can ensure that the results of component inspection are completely correct. Generally, after the soldering is completed, when the circuit board has a series of bad conditions, such as component skew causing wireless tails and electrical failures, etc., the bad conditions should be corrected. It was only discovered when the reason was overhauled, which is not only cumbersome, but also easy to cause damage to components and circuit boards.

Therefore, how to provide a method that can solve the above-mentioned shortcomings of the prior art and further improve the yield of the finished circuit board is an urgent problem to be solved at present.

Contents of the invention

In order to overcome the above-mentioned shortcomings of the prior art, the main purpose of the present invention is to provide a hand-inserted component inspection method, which prevents components from being skewed during soldering operations and improves the yield rate of finished circuit boards.

Another object of the present invention is to provide a method for inspecting hand-inserted components, which can effectively check whether the result of components inserted on the circuit board is correct or not, and avoid manual insertions due to human factors. Component skew and other situations that easily lead to a decrease in the yield of the finished circuit board.

In order to achieve the above and other purposes, the present invention provides a hand-inserted component inspection method, which is suitable for the continuous inspection operation after inserting multiple components on the circuit board by hand-inserting, and the user can easily find faulty connections The hand-inserted components are improved to increase the shipment yield of the circuit board. The hand-inserted component inspection method of the present invention includes: the hand-inserted component inspection method includes: inserting the hand-inserted component at the corresponding position on the surface of the circuit board; And a cover plate is covered on the surface of the circuit board, and an opening is formed in the cover plate corresponding to the position where the hand-inserted component is inserted on the surface of the circuit board, exposing the hand-inserted component, and the user inspects the inserted component on the circuit board. Whether the insertion form of the hand-inserted components on the surface is correct.

Wherein, the cover plate can fix these hand-inserted components on the circuit board, preventing these hand-inserted components from shaking or skewing during welding operations, which will affect the yield rate of the finished circuit board; moreover, the cover plate The number of openings and the size of the openings correspond to the number and size of the hand-inserted components or other components that need to be connected to the circuit board. The user can effectively check whether the hand-inserted components are affected by multiple insertions, missed insertions, or wrong insertions. In addition, for components with positive and negative polarities such as electrolytic capacitors, there is also a polarity guide for the hand-inserted components around the opening that exposes these polarized hand-inserted components in the cover plate. Corresponding marks, so that when inserting the hand-inserted components on the circuit board, you can use the cover plate to check whether the polarity of the hand-inserted components corresponds to the marks around the corresponding openings on the cover plate, and further confirm these hand-inserted components. The correctness of the polarity of the plug-in element.

Therefore, the hand-inserted component inspection method of the present invention mainly uses the cover plate to cover the circuit board to quickly, accurately and simply check whether the components mounted on the surface of the circuit board are assembled correctly (for example, check the circuit board by the cover plate Whether the components on the surface have problems such as missed insertion, multi-insertion, skew, reverse polarity, etc.), prevent components from skewing during soldering operations, greatly improve the accuracy and work efficiency of hand-inserted component inspection, and increase the quality of the finished circuit board Rate.

Description of drawings

Fig. 1 is the operation flowchart of the present invention;

Fig. 2 is a schematic structural view of the cover plate of the present invention; and

Fig. 3 is a schematic diagram of fixing the cover plate on the circuit board of the present invention.

Detailed ways

Example

In order to more clearly illustrate the characteristics and the effect that can be achieved of the hand-inserted component inspection method of the present invention, the following embodiments are described by taking a plurality of hand-inserted components inserted on the surface of a motherboard (Mother Board, MB) as an example, but It is not intended to limit the scope of application of the present invention.

FIG. 1 is an operation flowchart showing the flow steps of the inspection method for hand-inserted components of the present invention. The implementation steps of the method of the present invention will be described in detail below with reference to FIGS. 2 and 3 .

First execute step S1, insert a plurality of hand-inserted components 2 (as shown in Fig. 2 ) on the corresponding positions on the surface of the circuit board 1, that is, insert the hand-inserted components 2 to be soldered on the circuit board 1 respectively on the circuit board 1 corresponding to the soldering position, in this embodiment, the circuit board 1 is provided with a plurality of openings for the insertion of the hand-inserted components 2, such as plated through holes (PTH) that run through the circuit board 1; the hand-inserted components 2 can It is electronic components such as resistors, capacitors, diodes, transistors, sockets, interface components, etc. Then, go to step S2.

In step S2, a cover plate 3 (as shown in FIG. 2 ) is provided, and the cover plate 3 is covered on the surface of the circuit board 1, so as to check whether the insertion state of the hand-inserted component 2 connected to the surface of the circuit board 1 is correct. sex. As shown in FIG. 2 , the area and opening position of the cover plate 3 are determined by the size of the circuit board 1 and the layout position of the hand-inserted components 2 inserted on the surface of the circuit board 1 . In this embodiment, the cover plate 3 is slightly smaller than the circuit board 1, and the position corresponding to the surface of the circuit board 1 for receiving the hand-inserted component 2 in the cover plate 3 is correspondingly provided with a plurality of openings 30. On the cover plate 3 When placed on the circuit board 1, the manual component 2 and other components can be exposed. The cover plate 3 can also fix the hand-inserted component 2 on the circuit board 1, ensuring that the hand-inserted component 2 can be inserted vertically on the surface of the circuit board 1, so that the hand-inserted component 2 will not be damaged during subsequent welding operations. Shaking or skewing can cause problems such as wireless tails and electrical faults; wherein, the number and size of the openings 30 correspond to the number and size of the hand-inserted components 2 to be soldered on the circuit board 1 .

In addition, in the present invention, not only the hand-inserted component 2 can be fixed on the surface of the circuit board 1 by the cover plate 3, but also the position where the hand-inserted component 2 is connected to the surface of the circuit board 1 can be checked through the cover plate 3. Problems such as missed insertion, multi-insertion, and reversed polarity insertion; for example, for electrolytic capacitors and diodes with polarity hand-inserted components 2, correspondingly, there are also settings around the openings in the cover plate 3 that expose these polarized hand-inserted components. There is a mark 32 corresponding to the hand-inserted component, so that when the cover plate 3 is connected to the surface of the circuit board 1, the user can check whether the polarity of the hand-inserted component 2 corresponds to the mark 32 around the corresponding opening 30, If the polarity of the hand-inserted component 2 does not correspond to the mark 32 around the corresponding opening 30 of the cover plate 3, it can be judged that the polarity of the hand-inserted component 2 has been inserted reversely, so that the user can know and adjust the polarity of the hand-inserted component 2 Direction, to avoid the failure of the hand-inserted component 2 due to reversed polarity insertion. In this embodiment, the mark 32 is, for example, a red dot to mark the positive pole of the hand-inserted component 2 , which is provided on the corresponding side around the corresponding opening 30 of the cover plate 3 . The cover plate 3 can also be provided with an arrow mark 34 for prompting the direction of the cover plate 3 into the plate, so that the cover plate 3 can be correctly connected (as shown in Figure 3, it is an embodiment that the cover plate of the present invention cooperates with the circuit board Schematic). Furthermore, when no hand-inserted components 2 are exposed in part of the opening 30 of the cover plate 3, that is, the number of inserted hand-inserted components 2 required on the surface of the circuit board 1 does not match the number of openings 30 provided on the cover plate 3, which means that the circuit On the surface of the board 1, the hand-inserted components 2 are missing. In addition, if the cover plate 3 cannot cover the manual component 2 smoothly and fix the manual component 2 on the circuit board 1 , it means that some components in the manual component 2 are inserted in the wrong position. At this time, the inspector can carry out corresponding renovation measures according to the inspection results, repeatedly check and confirm that the assembly of the hand-inserted component 2 is completely correct, and then proceed to step S3.

In step S3, after checking and confirming that the insertion position, number, model type, polarity and other factors of the inserted components are completely correct, the soldering process can be performed on the other surface of the circuit board 1, and the hand-inserted components 2 is inserted on the circuit board 1. In this embodiment, it first provides the circuit board 1 with a certain inclination angle, such as 5 to 8 degrees, so as to perform welding operations. In this way, by covering the hand-inserted component 2 with the cover plate 3 and fixing the hand-inserted component 2 on the circuit board 1, the hand-inserted component 2 will not shake due to the inclination angle of the circuit board 1 or in the wave soldering operation track, resulting in The deflection of the hand-inserted component 2 relative to the circuit board 1 is sufficient to affect the yield rate of the circuit board 1 . Since this welding technology is an existing technology and is not the technical content of this case, it will not be repeated here. Then go to step S4.

In step S4, after the soldering process is completed, the cover plate 3 can be removed from the circuit board 1 to reveal the hand-inserted component 2 that has been soldered on the circuit board 1. At this time, the hand-inserted component 2 is correct and has no Welded on the circuit board 1 obliquely, it can effectively avoid electrical faults and parts damage of the hand-inserted component 2, and can greatly improve the appearance and cleanliness of the circuit board. At the same time, the yield rate of the finished circuit board is increased.

Therefore, the hand-inserted component inspection method of the present invention mainly covers the circuit board by the cover plate, and quickly, accurately and simply checks whether the insertion form of the hand-inserted component that needs to be connected on the surface of the circuit board is correct (for example, by the cover board to check whether the components on the surface of the circuit board have missing insertion, over-insertion, skew, polarity reversal, etc.), so the accuracy and work efficiency of hand-inserted component inspection can be greatly improved, and the yield rate of the finished circuit board can be improved.

Claims (6)

1. method for inspecting handi inserted component, whether correct, it is characterized in that this method for inspecting handi inserted component comprises if being used to inspect the form that the hand inserted component is plugged on the circuit board:

The hand inserted component is plugged on the position of this circuit board surface correspondence; And

Cover a cover plate at this circuit board surface, and in this cover plate the position that should circuit board surface be plugged with this hand inserted component is formed with opening, expose this hand inserted component, whether the user inspects this hand inserted component plant form that is plugged on circuit board surface correct.

2. method for inspecting handi inserted component as claimed in claim 1 is characterized in that, comprises the electronic component with positive and negative polarity in this hand inserted component.

3. method for inspecting handi inserted component as claimed in claim 2, it is characterized in that, this around openings is provided with the sign corresponding with this electronic component polarity, and whether the time be convenient on the user inspects this electronic component by this cover plate polarity and this cover plate corresponding parameatal sign in assembling corresponding.

4. method for inspecting handi inserted component as claimed in claim 1 is characterized in that, it is corresponding that the number of openings of this cover plate and area size and this circuit board surface connect the number and the area size of the hand inserted component put and other element.

5. method for inspecting handi inserted component as claimed in claim 1 is characterized in that, this method for inspecting handi inserted component also is included in another surface of this circuit board and carries out welding process, is welded on this circuit board connecing to put at this circuit board surface and assemble correct element.

6. method for inspecting handi inserted component as claimed in claim 5 is characterized in that, this method for inspecting handi inserted component also is included in the step that removes this cover plate after this welding processing procedure is finished.

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