Pin inserting method

Abstract

The invention relates to a circuit board production method, in particular to a pin inserting method, which comprises the following steps of: obtaining a first compensation diameter based on the diameter of a pin; obtaining a second compensation diameter from the first compensation diameter based on the diameter correction coefficient; obtaining a second drilling depth based on the thickness of the mounting plate; the first drilling depth is obtained according to the second drilling depth based on the depth correction coefficient; the mounting plate is drilled for the first time, the drilling diameter of the first time of drilling is the first compensation diameter, and the depth of the first time of drilling is the first drilling depth; drilling is conducted on the mounting plate for the second time, the drilling diameter of the second time of drilling is the second compensation diameter, and the depth of the second time of drilling is the second drilling depth; a needle is inserted in a direction from the first hole to the second hole. Through two-section punching, the diameter of the first hole in the top is larger than that of a needle, and on the basis that the fixing strength and stability of the needle are guaranteed, more convenient and higher-success-rate needle inserting operation is achieved.

Description

Technical Field

[0001] The present invention relates to a method for manufacturing a circuit board, and more particularly to a method for inserting pins. Background Art

[0002] The description in this section only provides background information related to the disclosure of the present invention and does not constitute prior art.

[0003] During the production of a circuit board, it is often necessary to perform a pin insertion operation (also called pin planting) on the board to be installed (usually a circuit substrate) to achieve corresponding electrical connections. Specifically, before inserting the pins, it is necessary to calculate the diameter of the pins and the thickness of the mounting board, and set reasonable diameters and depths for the inserted pins, as well as the diameters and depths of the corresponding holes, and then perform a drilling operation.

[0004] In the prior art, generally, in order to maintain the stability of the inserted pins, the diameter of the drilled hole is slightly smaller than the actual diameter of the pins, so as to achieve stable fixation of the pins. However, this also increases the difficulty of inserting the pins, and the pins are prone to being knocked off, resulting in unqualified pin insertion quality, affecting electrical connections and the structural stability of the pins.

[0005] It should be noted that the above introduction of the technical background is only for the convenience of clearly and completely explaining the technical solution of the present invention and facilitating the understanding of those skilled in the art. It cannot be considered that the above technical solutions are well-known to those skilled in the art just because these solutions are described in the background art section of the present invention. Summary of the Invention

[0006] The object of the present invention is to provide a method for inserting pins, which can perform two-stage drilling. The first hole at the top has a diameter larger than that of the pins, and on the basis of ensuring the fixing strength and stability of the pins, a more convenient and higher-success-rate pin insertion operation can be achieved.

[0007] To achieve the above object, the present invention discloses the following method for inserting pins, which includes:

[0008] Measure the diameter of the pins, and obtain a first compensation diameter based on the diameter of the pins, where the first compensation diameter is larger than the diameter of the pins; obtain a second compensation diameter based on the diameter correction coefficient for the first compensation diameter, and the second compensation diameter is smaller than the diameter of the pins;

[0009] Measure the thickness of the mounting board, and obtain a second drilling depth based on the thickness of the mounting board, where the second drilling depth is smaller than the thickness of the mounting board; obtain a first drilling depth based on the depth correction coefficient for the second drilling depth, and the first drilling depth is smaller than the second drilling depth and smaller than the thickness of the board;

[0010] Perform a first drilling on the mounting plate, where the drilling diameter of the first drilling is the first compensation diameter, and the drilling depth of the first drilling is the first drilling depth, to obtain a first hole;

[0011] Perform a second drilling on the mounting plate, where the drilling diameter of the second drilling is the second compensation diameter, and the drilling depth of the second drilling is the second drilling depth, to obtain a second hole, and the second hole is coaxial with the first hole;

[0012] Insert the needle along the direction from the first hole to the second hole.

[0013] As a further description of the above technical solution, after the step "Insert the needle along the direction from the first hole to the second hole", it further includes using a micrometer to measure the perpendicularity of the needle to obtain the offset of the needle.

[0014] As a further description of the above technical solution, when the offset of the needle is less than or equal to twice the difference between the first compensation diameter and the diameter of the needle, it is judged that the needle insertion is qualified, and when the offset of the needle is greater than twice the difference between the first compensation diameter and the diameter of the needle, it is judged that the needle insertion is unqualified.

[0015] As a further description of the above technical solution, the first drilling depth is set to be half of the second drilling depth.

[0016] As a further description of the above technical solution, the difference between the first compensation diameter and the diameter of the needle is equal to the difference between the second compensation diameter and the diameter of the needle.

[0017] As a further description of the above technical solution, the diameter of the needle is set to 3.1 mm, the first compensation diameter is set to 3.125 mm, and the second compensation diameter is set to 3.075 mm.

[0018] As a further description of the above technical solution, in the step "Insert the needle along the direction from the first hole to the second hole", keep at least part of the needle outside the first hole and the second hole.

[0019] As a further description of the above technical solution, in the step "Insert the needle along the direction from the first hole to the second hole", stop applying force to the needle until the end of the needle abuts against the end face of the second hole.

[0020] By means of the above technical solution, the beneficial effects of the present invention are as follows:

[0021] The pin insertion method of the present invention can perform two-stage drilling. The first hole at the top has a diameter larger than that of the pin. On the basis of ensuring the fixing strength and stability of the pin, a more convenient and higher-success-rate pin insertion operation can be achieved. Specifically, the first compensation diameter with a larger size and the second compensation diameter with a smaller size for the hole to be drilled can be calculated based on the existing pin, corresponding to the first drilling and the second drilling respectively. Therefore, a two-stage hole can be finally formed - the first hole has a larger aperture to facilitate the operator to improve the success rate of pin insertion and avoid deviation, and the second hole has a smaller aperture to fix the pin more stably.

[0022] To further understand the features and technical content of the present invention, please refer to the following detailed description and drawings of the present invention. However, the provided drawings are only for reference and illustration, and are not used to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] To more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in this specification. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 is a schematic cross-sectional view of a pin insertion method provided by an embodiment of this specification;

[0025] In the figure:

[0026] 1. Pin;

[0027] 2. Mounting plate;

[0028] 3. First hole; 31. Hole gap;

[0029] 4. Second hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] To enable those skilled in the art to better understand the technical solutions in this specification, the following will clearly and completely describe the technical solutions in the embodiments of this specification with reference to the drawings in the embodiments of this specification. Obviously, the described embodiments are only some embodiments of this specification, rather than all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this specification.

[0031] The following are specific embodiments to illustrate the implementation manners of the present invention. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of the present invention. Additionally, the drawings of the present invention are only for simple schematic illustration and are not drawn according to actual dimensions, which is stated in advance. The following embodiments will further detail the related technical content of the present invention, but the disclosed content is not used to limit the protection scope of the present invention.

[0032] It should be understood that although terms such as "first", "second", "third", etc. may be used herein to describe various components or signals, these components or signals should not be limited by these terms. These terms are mainly used to distinguish one component from another, or one signal from another. Additionally, the term "or" used herein should, depending on the actual situation, possibly include any one or a combination of more of the associated listed items.

[0033] Please refer to Figure 1 , a pin insertion method for this embodiment, where the pin insertion method includes:

[0034] Measure the diameter of the needle 1, and obtain a first compensated diameter based on the diameter of the needle 1, where the first compensated diameter is greater than the diameter of the needle; obtain a second compensated diameter based on the first compensated diameter and a diameter correction coefficient, and the second compensated diameter is less than the diameter of the needle;

[0035] Measure the thickness of the mounting plate 2, and obtain a second drilling depth based on the thickness of the mounting plate 2, where the second drilling depth is less than the thickness of the mounting plate 2; obtain a first drilling depth based on the second drilling depth and a depth correction coefficient, and the first drilling depth is less than the second drilling depth and less than the thickness of the plate;

[0036] Perform a first drilling on the mounting plate 2, where the drilling diameter of the first drilling is the first compensated diameter and the drilling depth of the first drilling is the first drilling depth, to obtain a first hole 3;

[0037] Perform a second drilling on the mounting plate 2, where the drilling diameter of the second drilling is the second compensated diameter and the drilling depth of the second drilling is the second drilling depth, to obtain a second hole 4, and the second hole 4 is coaxial with the first hole 3;

[0038] Insert the needle 1 along the direction from the first hole 3 to the second hole 4.

[0039] In the above method, the pin 1 can be a pin of an electronic component, such as a metal pin of a resistor, a capacitor, a diode, a transistor, or an integrated circuit (IC). The mounting plate 2 can be a circuit board or other plate-like structure with a rigid surface. Specifically, the pin 1 is set as a cylindrical body, and both ends can have end faces or tips. The mounting plate 2 is set as a flat plate. The position of the pin insertion is selected on one of the surfaces of the mounting plate 2, which can be the top surface in this embodiment. According to the requirements of circuit or circuit pattern design, the corresponding position is selected for insertion.

[0040] Based on the above method, first, by measuring the thickness of the mounting plate 2 and the diameter of the pin 1, to determine the depth at which the pin 1 should be inserted into the mounting plate 2, which can generally be set to half of the plate thickness. Then, based on the above-defined final depth, the final depth of the second hole 4 is defined, that is, the second drilling depth is defined. Then, based on the second drilling depth, a smaller-sized first drilling coefficient is obtained through a depth correction coefficient. The first drilling depth is used to drill the first hole 3, and the second drilling depth is used to drill the deeper second hole 4. The first hole 3 and the second hole 4 actually partially overlap with each other and are two-end type holes. According to the first compensation diameter, the aperture of the first hole 3 is larger, and according to the second compensation diameter, the aperture of the second hole 3 is smaller. Therefore, under the intersection of the pin 1, the first hole 3, and the second hole 4, a stepped or annular hole gap 31 is formed in the outer peripheral area of the first hole 3. During the final pin insertion process, the formation of the hole gap 31 plays a role in expanding the aperture and reducing the difficulty of pin insertion.

[0041] With the above method, two-stage drilling can be performed. The top first hole 3 has a larger diameter than the pin. On the basis of ensuring the fixing strength and stability of the pin 1, a more convenient and higher-success-rate pin insertion operation can be achieved. Specifically, the first compensation diameter with a larger size and the second compensation diameter with a smaller size for the hole to be drilled can be calculated based on the existing pin, corresponding to the first drilling and the second drilling respectively.

[0042] Therefore, finally, a two-stage hole can be formed - the first hole 3 has a larger aperture to facilitate the operator to improve the success rate of pin insertion and avoid deviation, and the second hole 4 has a smaller aperture, which can fix the base of the pin more stably. The hole gap 31 on the outer periphery of the first hole 3 is the moving space for the redundant pin 1.

[0043] In the above embodiment, the pin 1 can be set as a general metal pin. Its enlarged view is as Figure 1The shown regular rectangular theme structure has end faces at both the upper and lower ends and is cylindrical in the middle position. The diameter of the needle 1 refers to the diameter of the regular cylindrical section. The mounting plate 2 can be set as a circuit board or other structure with an area and thickness much larger than that of the needle 1 for mounting. According to the thickness requirement of the mounting plate 2, the insertion depth requirement of the needle 1 is determined. Specifically, during the insertion of the needle 1, it is inserted perpendicularly along the horizontal extension direction of the mounting plate 2 so that the needle 1 has no inclination angle relative to the mounting plate 2, which can avoid skewing and achieve the most stable pin insertion effect. Taking Figure 1 the embodiment in

[0044] as an example, actually after the needle 1 is completely inserted, there is still a large gap between the bottom of the needle 1 and completely penetrating the mounting plate 2. That is to say, the needle 1 in this embodiment cannot completely affect the mounting plate 2. In fact, the mounting plate 2 that is not penetrated at the bottom of the needle 1 can still provide a certain degree of stability for the bottom of the needle 1.

[0045] After the needle 1 is inserted along the direction from the first hole 3 to the second hole 4, it further includes using a micrometer to measure the perpendicularity of the needle 1 to obtain the offset of the needle 1. Specifically, when the offset of the needle 1 is less than or equal to twice the difference between the first compensation diameter and the diameter of the needle, it is judged that the pin insertion is qualified. When the offset of the needle is greater than twice the difference between the first compensation diameter and the diameter of the needle, it is judged that the pin insertion is unqualified. Specifically, in one of the embodiments, when the difference between the first compensation diameter and the diameter of the needle is 1 mil, the pin insertion is qualified when the measured offset of the needle 1 is less than or equal to 2 mil, and vice versa, when it is greater than 2 mil, the pin insertion is unqualified.

[0046] By limiting the offset range, situations where the quality does not meet the factory standards can be excluded, rather than judging that it does not meet the factory standards just because there is a little offset. In fact, due to the strong fixing effect of the second hole 4 on the root in the present invention, the allowable offset range of 2 mil is larger, and on this basis, the fixing force of the needle 1 can still be ensured.

[0047] The first drilling depth is set to be half of the second drilling depth. That is to say, in this embodiment, the first hole 3 occupies about half of the outer distance, and the second hole 4 occupies about half of the inner distance. On this basis, a stable fastening effect of the second hole 4 on the needle 1 can be ensured, and the needle 1 can be prevented from offsetting.

[0048] Furthermore, the difference between the first compensation diameter and the diameter of the needle is equal to the difference between the second compensation diameter and the diameter of the needle. In one embodiment, the diameter of the needle is set to 3.1 mm, the first compensation diameter is set to 3.125 mm (the aperture diameter of the first hole 3), and the second compensation diameter (the aperture diameter of the second hole 4) is set to 3.075 mm. In the corresponding comparative example, the diameter of the needle is set to 3.1 mm, and the hole with a unique aperture diameter is set to 3.05 mm, which is slightly smaller than 3.1 mm. Through comparison, since the aperture diameter of the comparative example is smaller than the diameter, the knocking deviation probability in the comparative example is significantly greater than that of this embodiment, and the fixing and stabilizing effect of this embodiment is comparable to that of the comparative example.

[0049] It should be noted that, taking the above embodiment as an example, the difference between the first compensation diameter and the diameter of the needle and the difference between the second compensation diameter and the diameter of the needle are far less than the actual diameter of the needle 1, more than 20 times, so that at least the first hole 3 can still play the role of guiding and limiting the needle 1.

[0050] Furthermore, in the step of "inserting the needle 1 along the direction from the first hole 3 to the second hole 4", at least part of the needle 1 is kept outside the first hole 3 and the second hole 4. That is to say, in this embodiment, the first hole 3 and the second hole 4 form the function of fixing part of the needle 1. In fact, although the aperture diameter of the first hole 3 is larger than that of the needle 1, due to the close size, the needle 1 still plays the role of limiting the hole. The needle extending outside the first hole 3 is used to play the role of electrical connection.

[0051] Furthermore, in the step of "inserting the needle 1 along the direction from the first hole 3 to the second hole 4", after the end of the needle 1 abuts against the end face of the second hole 4, the force applied to the needle 1 is stopped. In this embodiment, the end of the needle 1 is completely locked and fixed by the second hole 4 with a smaller aperture diameter, and has a better fixing effect.

[0052] The content disclosed above is only the preferred and feasible embodiment of the present invention, and does not limit the scope of the patent application of the present invention. Therefore, all equivalent technical changes made by using the content of the specification and drawings of the present invention are included in the scope of the patent application of the present invention.

[0053] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other, and the key points of each embodiment are the differences from other embodiments.

[0054] Although the present application is depicted through embodiments, those of ordinary skill in the art know that the present application has many deformations and changes without departing from the spirit of the present application. It is hoped that the attached embodiments include these deformations and changes without departing from the present application.

Claims

1. A pin insertion method for inserting a pin on a mounting board, characterized in that: The pin insertion method comprises: Measuring the diameter of the needle and obtaining a first compensation diameter based on the diameter of the needle, wherein the first compensation diameter is larger than the diameter of the needle; obtaining a second compensation diameter based on the first compensation diameter and a diameter correction coefficient, wherein the second compensation diameter is smaller than the diameter of the needle; Measuring the thickness of the mounting plate and obtaining a second drilling depth based on the thickness of the mounting plate, wherein the second drilling depth is less than the thickness of the mounting plate; obtaining a first drilling depth based on the second drilling depth and a depth correction coefficient, wherein the first drilling depth is less than the second drilling depth and less than the thickness of the plate; Performing a first drilling on the mounting plate, wherein the drilling diameter of the first drilling is a first compensation diameter, and the drilling depth of the first drilling is the first drilling depth, to obtain a first hole; Drilling the mounting plate for a second time, wherein the drilling diameter of the second drilling is the second compensation diameter, and the drilling depth of the second drilling is the second drilling depth, to obtain a second hole, which is coaxial with the first hole; The needle is inserted in a direction from the first hole to the second hole.

2. The pin insertion method according to claim 1, characterized in that: After the step of "inserting the needle from the first hole to the second hole", the method further includes measuring the verticality of the needle using a micrometer to obtain the offset of the needle.

3. The pin insertion method according to claim 2, characterized in that: When the offset of the needle is less than or equal to twice the difference between the first compensation diameter and the diameter of the needle, the needle is judged to be qualified; when the offset of the needle is greater than twice the difference between the first compensation diameter and the diameter of the needle, the needle is judged to be unqualified.

4. The pin insertion method according to claim 1, characterized in that: The first drilling depth is set to be half of the second drilling depth.

5. The pin insertion method according to claim 1, characterized in that: The difference between the first compensation diameter and the diameter of the needle is equal to the difference between the second compensation diameter and the diameter of the needle.

6. The pin insertion method according to claim 5, characterized in that: The diameter of the needle is set to 3.1 mm, the first compensation diameter is set to 3.125 mm, and the second compensation diameter is set to 3.075 mm.

7. The pin insertion method according to claim 1, characterized in that: In the step of “inserting the needle from the first hole to the second hole”, at least a portion of the needle is kept outside the first hole and the second hole.

8. The pin insertion method according to claim 1, characterized in that: In the step of "inserting the needle from the first hole to the second hole", until the tip of the needle abuts against the end surface of the second hole, stop applying force to the needle.

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