Printing quality control device for printed circuit board components with inconsistent board thickness

Abstract

The present invention relates to the technical field of printing control, and discloses a printing quality control device for a printed circuit board assembly with inconsistent plate thickness, comprising a tray, a base, a connector, an elastic unit, a limiting unit, a cover plate and a positioning unit, wherein the tray is arranged on the base, a support frame is arranged on the tray, and is used to support the printed circuit board assembly with inconsistent plate thickness, the limiting unit is arranged between the printed circuit board assembly and the support frame to limit the height between the printed circuit board assembly and the support frame, the limiting unit is connected to the base through a connector, the elastic unit is arranged on the limiting end of the limiting unit, the cover plate is arranged in a local area of ​​the printed circuit board assembly in a manner of pressing the elastic unit and is connected to the tray through a connector, the printed circuit board assembly is pressed and fixed by the positioning unit, a slideway and a slider arranged in the slideway are arranged on the limiting device, the slider is connected to the elastic unit, and the elastic unit is driven by the cooperation of the slider and the slideway to realize the horizontal movement of the printed circuit board assembly. Thus, the printing quality of the printed circuit board assembly is improved.

Description

Technical Field

[0001] The invention relates to the technical field of printing control, in particular to a printing quality control device for a printed board assembly with inconsistent board thickness. Background Art

[0002] With the influence of foreign chips and the rapid development of aerospace products, the assembly requirements of high-density printed circuit board components have led to the widespread use of highly integrated, domestically produced high-density devices. As electronic products develop towards high-density miniaturization, aerospace complete machine products have also developed from the original large chassis to small single boards. A new single-board product may have replaced an old model of the complete machine. Therefore, single-board products play an increasingly important role in aerospace subsystems at all levels. In order to ensure its high-quality and highly reliable product characteristics, a lot of work needs to be done in the design, process and production details, and reasonable measures need to be taken to meet the requirements of the development of aerospace electronic products.

[0003] When designing high-density printed circuit boards, due to limited space, there will be some interference due to height requirements, so the problem of inconsistent board thickness often occurs, which is very easy to cause improper operation during the printing process, which will seriously affect the welding reliability and service life of the product. Therefore, in the electronic assembly printing process that requires high reliability and long life, this type of printed circuit board components must be printed with protective support. At present, the printing process of such inconsistent board thickness printed circuit board components mostly relies on the technical level and experience of the operator to print the product, the product consistency is poor, and there is less solder during the printing process, which greatly affects the welding quality. Summary of the invention

[0004] The invention provides a printing quality control device for a printed circuit board assembly with inconsistent board thickness, which can solve the problems in the prior art.

[0005] The present invention provides a printing quality control device for a printed circuit board assembly with inconsistent plate thickness, wherein the device comprises a tray, a base, a connecting piece, an elastic unit, a limiting unit, a cover plate and a positioning unit, wherein the tray is arranged on the base, the tray is provided with a support frame for supporting the printed circuit board assembly with inconsistent plate thickness, the limiting unit is arranged between the printed circuit board assembly and the support frame for limiting the height between the printed circuit board assembly and the support frame, the limiting unit is connected to the base through a connecting piece, the elastic unit is arranged on a limiting end on the limiting unit, the cover plate is arranged in a local area of ​​the printed circuit board assembly in a manner of pressing the elastic unit and is connected to the tray through the connecting piece, the printed circuit board assembly is pressed and fixed by the positioning unit, the limiting device is provided with a slideway and a slider arranged in the slideway, the slider is connected to the elastic unit, and the elastic unit is driven by the cooperation of the slider and the slideway to realize the horizontal movement of the printed circuit board assembly.

[0006] Preferably, a boss is provided on the bottom surface of the support frame, and a limit block is provided on the top surface of the support frame.

[0007] Preferably, a limiting groove is provided in the middle of the tray for limiting the printed circuit board assembly.

[0008] Preferably, the thickness of the limiting device is less than or equal to the thickness of the printed circuit board assembly.

[0009] Preferably, the elastic unit is a spring.

[0010] Preferably, the connecting member is a screw.

[0011] Preferably, the positioning device is a pin.

[0012] Preferably, the material of the base and the tray is synthetic stone.

[0013] Through the above technical solution, the difficulties of over-reliance on the technical level of operating technicians and poor consistency during the printing process can be overcome, and the printing quality of printed circuit board components with inconsistent board thickness can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The included drawings are used to provide a further understanding of the embodiments of the present invention, which constitute a part of the specification, are used to illustrate the embodiments of the present invention, and together with the text description, explain the principles of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 A schematic diagram of a printing quality control device for a printed circuit board assembly with inconsistent board thickness according to an embodiment of the present invention is shown;

[0016] Figure 2 A three-dimensional schematic diagram of a printing quality control device for a printed circuit board assembly with inconsistent board thickness according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0017] It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0019] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0020] like Figure 1 and 2 As shown, an embodiment of the present invention provides a printing quality control device for a printed circuit board assembly with inconsistent board thickness, wherein the device comprises a tray 1, a base 3, a connector 4, an elastic unit 5, a limiting unit 6, a cover plate 7 and a positioning unit 8, wherein the tray 1 is arranged on the base 3, the tray 1 is provided with a support frame for supporting a printed circuit board assembly 2 with inconsistent board thickness, the limiting unit 6 is arranged between the printed circuit board assembly 2 and the support frame for limiting the height between the printed circuit board assembly 2 and the support frame, the limiting unit 6 is connected to the base 3 through the connector 4, the elastic unit 5, the limiting unit 6, the cover plate 7 and the positioning unit 8, the tray 1 is arranged on the base 3, the tray 1 is provided with a support frame for supporting a printed circuit board assembly 2 with inconsistent board thickness, the limiting unit 6 is arranged between the printed circuit board assembly 2 and the support frame for limiting the height between the printed circuit board assembly 2 and the support frame, the limiting unit 6 is connected to the base 3 through the connector 4, the elastic unit 5 The unit 5 is arranged on the limiting end of the limiting unit 6, and the cover plate 7 is arranged in a local area of ​​the printed circuit board assembly 2 (that is, the area outside the printing area of ​​the printed circuit board assembly, which does not affect the normal printing of the printed circuit board assembly) in a manner of pressing the elastic unit 5 and is connected to the tray 1 through the connecting member 4. The printed circuit board assembly 2 is pressed and fixed by the positioning unit 8. The limiting device 6 is provided with a slideway and a slider arranged in the slideway, and the slider is connected to the elastic unit 5. The elastic unit 5 is driven by the cooperation of the slider and the slideway to realize the horizontal movement of the printed circuit board assembly 2.

[0021] The limiting end may be a convex cylinder and may be designed to have an arc angle.

[0022] Through the above technical solution, the difficulties of over-reliance on the technical level of operating technicians and poor consistency during the printing process can be overcome, and the printing quality of printed circuit board components with inconsistent board thickness can be improved.

[0023] Specifically, the entire surface of a printed board assembly with inconsistent board thickness can be placed on the same horizontal plane during printing through the tray, the limiting unit, the elastic unit, the cover plate and the positioning unit, so as to facilitate the printing operation of the printing press and improve the printing quality.

[0024] According to an embodiment of the present invention, a boss is provided on the bottom surface of the support frame, and a limit block is provided on the top surface of the support frame.

[0025] That is, the outer shape of the printed circuit board assembly can be limited by the limiting block.

[0026] According to an embodiment of the present invention, a limiting groove is provided in the middle of the tray 1 for limiting the printed circuit board assembly 2 .

[0027] For example, the printed circuit board is limited by the upper, lower, left and right four side walls of the limiting groove.

[0028] According to an embodiment of the present invention, the thickness of the limiting device 6 is less than or equal to the thickness of the printed circuit board assembly 2 .

[0029] According to an embodiment of the present invention, the elastic unit 5 is a spring.

[0030] According to an embodiment of the present invention, the connecting member 4 is a screw.

[0031] According to one embodiment of the present invention, the positioning device 8 is a pin.

[0032] According to one embodiment of the present invention, the base 3 and the tray 1 are made of synthetic stone.

[0033] The printing quality control device for printed circuit board assemblies with inconsistent board thickness according to the present invention is described below with reference to examples.

[0034] The base is the base of the entire tooling. While ensuring overall stability, it can meet the requirements of the printing quality control device facing the printing machine, and can ensure that the printed board assembly to be printed in the printing quality control device is at the printing position height of the printing machine, which is convenient for the subsequent operation of the printing machine. There is a limit groove in the middle of the tray, which is used to place the printed board to prevent the printed board from moving without restriction on the tray; the limit groove exists in the up, down, left and right directions, which is used to fix the printed board to be printed. When the printed board is locked with the tray, the depth in the limit groove can be consistent with the thickness of the limit printed board, avoiding horizontal movement and up and down movement in space.

[0035] The support frame is used to support the printed circuit board assembly. The support frame is designed with a boss at the bottom and a limit block on the top surface that limits the shape of the printed circuit board by combining rigidity and flexibility. Under the premise of ensuring the stability of the bottom, the printed circuit board assembly is made to fit perfectly on the pallet as much as possible, ensuring the stable operation of the printing device in the overall structure of the printing equipment.

[0036] The limit unit is used to ensure the distance between the support frame and the printed circuit board assembly with inconsistent board thickness. The limit unit is provided with a spring, which is convenient for connecting with the slider to realize horizontal movement and controllable height; the limit unit can be locked and fixed with screws to prevent the distance between the support frame and the printed circuit board assembly from changing arbitrarily.

[0037] The pin is used to press and fix the position where the printed circuit board assembly is placed to limit the movement of the device in three axes; the overall size of the pin is moderate to avoid unstable support, which may cause the printed circuit board assembly with inconsistent board thickness to move in three axes on the printing quality control device; the pin is easy to install, making the printing quality control device more integrated.

[0038] The support frame has outer dimensions that match the rigid-flexible printed circuit board and rigid-flexible printed circuit board mounting holes that match the pins, so that the support frame can place the printed circuit board assembly according to the size scale. The movement of the printed circuit board can be restricted by the positioning pins and installed in a suitable printing position.

[0039] The limiting unit can be set between the rigid-flexible printed circuit board assembly and the tray support frame, and the distance between the two components can be adjusted by the limiting unit to ensure that the rigid-flexible printed circuit board assembly can be printed using a printing machine to ensure printing quality.

[0040] The limiter unit can be replaced to meet the printing quality requirements of printed circuit board assemblies of different sizes and thicknesses. Preferably, the limiter units are replaced in pairs. The size of the limiter unit and the base matches the size of the pins for the printed circuit board with inconsistent board thickness, which can meet the contact between the end face and the surface of the side of the printed circuit board assembly with inconsistent board thickness; at the same time, the thickness d of the limiter unit and the thickness a of the printed circuit board assembly with inconsistent board thickness can meet the following requirements:

[0041] d≤a mm;

[0042] In other words, the limit unit can be used to control the position of the printed circuit board assembly and the height between it and the printing machine, so that the printed circuit board assembly is evenly stressed during the printing process and the printed solder paste is consistent, so as to ensure the printing quality of the printed circuit board assembly during the printing process.

[0043] The printed circuit board assembly can be fitted on the printing quality control device by horizontally moving the limit unit, and printing can be performed by the printing press while ensuring the height consistency between the printing position and the printing press and ensuring the safety of the operator.

[0044] In addition, by changing the position and size of the limiting unit, it can be used to print rigid-flexible printed circuit board assemblies of the same shape and different thicknesses, so that the same tooling can replace some components to meet the printing needs of various types of rigid-flexible printed circuit board assemblies with inconsistent board thicknesses.

[0045] It can be seen from the above embodiments that the printing quality control device for printed circuit board assemblies with inconsistent board thickness of the present invention has at least the following advantages:

[0046] 1. During the printing process of the printed board, the spring and the limit end are tightly combined to ensure that the root of the rigid board and the flexible line are not torn during the printing process, thereby preventing the function of the printed board from being damaged.

[0047] 2. The limit end has a convex cylindrical design, which can sink the spring into the convex cylinder, so that the limit end can be automatically controlled on the pallet to prevent the intervention of external force and ensure product quality.

[0048] 3. The limit end is designed with an arc angle design to avoid scratches or notches on the edge of the printed circuit board due to the angle of the edge during the printing of solder paste.

[0049] 4. The rigid-flexible printed circuit board printing quality control device is easy to assemble, and components can be replaced at will to meet the printing requirements of rigid-flexible printed circuit boards of various sizes.

[0050] 5. Compared with manual operation, it greatly improves the printing efficiency of products and meets the rhythm of rapid production. In addition, the hot air outlet is controlled by threaded connection during the rework process to avoid problems such as heating, temperature, and time inconsistency caused by the process.

[0051] 6. The printing quality control device is placed on the printing equipment. During the printing process of the controlled printed board assembly, the operator can stay away from the equipment to ensure the safety of the operator.

[0052] 7. The limit unit is placed as a movable component and can be replaced according to the thickness and size of the rigid-flexible printed circuit board assembly. This tooling is universal and can meet the printing quality control of some printed circuit board assemblies of the same type and different thicknesses.

[0053] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0054] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations, and the spatially relative descriptions used herein are interpreted accordingly.

[0055] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A printing quality control device for printed circuit board components with inconsistent board thickness, characterized in that: The device comprises a tray (1), a base (3), a connecting piece (4), an elastic unit (5), a limiting unit (6), a cover plate (7) and a positioning unit (8); the tray (1) is arranged on the base (3); the tray (1) is provided with a support frame for supporting a printed circuit board assembly (2) with inconsistent thickness; the limiting unit (6) is arranged between the printed circuit board assembly (2) and the support frame for limiting the height between the printed circuit board assembly (2) and the support frame; the limiting unit (6) is connected to the base (3) via the connecting piece (4); The elastic unit (5) is arranged on the limiting end of the limiting unit (6); the cover plate (7) is arranged in a local area of ​​the printed circuit board assembly (2) in a manner of pressing the elastic unit (5) and is connected to the tray (1) through the connecting piece (4); the printed circuit board assembly (2) is pressed and fixed by the positioning unit (8); a slideway and a slider arranged in the slideway are arranged on the limiting device (6); the slider is connected to the elastic unit (5); and the elastic unit (5) is driven by the cooperation of the slider and the slideway to realize the horizontal movement of the printed circuit board assembly (2).

2. The device according to claim 1, characterized in that The bottom surface of the support frame is provided with a boss, and the top surface of the support frame is provided with a limit block.

3. The device according to claim 2, characterized in that A limiting groove is provided in the middle of the tray (1) for limiting the position of the printed circuit board assembly (2).

4. The device according to claim 3, characterized in that The thickness of the limiting device (6) is less than or equal to the thickness of the printed circuit board assembly (2).

5. The device according to claim 4, characterized in that The elastic unit (5) is a spring.

6. The device according to claim 5, characterized in that The connecting piece (4) is a screw.

7. The device according to claim 6, characterized in that The positioning device (8) is a pin.

8. The device according to claim 7, characterized in that The base (3) and the tray (1) are made of synthetic stone.

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