PCB adsorption welding detection device

Abstract

The utility model discloses a PCB (Printed Circuit Board) adsorption welding detection device in the technical field of PCB detection, and the device comprises two transmission belts which are symmetrically arranged so as to respectively bear the two ends of a PCB, and the space between the two transmission belts is a detection interval; the two AOI devices are symmetrically arranged on the upper side and the lower side of the detection area and used for detecting the front face and the back face of the PCB correspondingly; the multiple elastic positioning blocks are fixedly arranged on the two conveying belts at equal intervals, the arrangement direction of the multiple elastic positioning blocks on each conveying belt is parallel to the conveying belts, and the elastic positioning blocks on the two conveying belts are symmetrically arranged; the conveying rollers are arranged at the two ends of the conveying belts and used for driving the conveying belts to operate, and the two conveying rollers located at the same ends of the two conveying belts are installed on the same rotating shaft.

Description

Technical Field

[0001] The utility model relates to the technical field of PCB detection, and particularly relates to a PCB adsorption welding detection device. Background Art

[0002] SMT, namely surface mount technology, is an electronic assembly technology. It mounts surface mount components without pins or short lead wires (abbreviated as SMC / SMD, also known as chip components in Chinese) on the surface of a printed circuit board (PCB) or the surface of other substrates, and is assembled by reflow soldering or dip soldering and other methods.

[0003] This technology does not require drilling insertion holes on the PCB board. After the components are surface-mounted, the PCB board is soldered by wave soldering or other methods. This technology has the characteristics of high assembly density, small volume and light weight of electronic products. The volume and weight of surface mount components are only about 1 / 10 of those of traditional inserted components. Generally, after adopting SMT, the volume of electronic products is reduced by 40% - 60%, and the weight is reduced by 60% - 80%.

[0004] In electronic devices that require high-density wiring and complex connections, double-sided PCB boards need to be used, that is, components are installed on both sides of the PCB board.

[0005] Common defects of PCB boards include solder joint defects. In the prior art, AOI (Automatic Optical Inspection) equipment is commonly used to detect solder joint defects of PCB boards;

[0006] However, the AOI in the prior art is only suitable for single-sided PCB boards. When detecting the other side of a double-sided PCB board, it is necessary to manually flip the PCB board, wasting too much time and resources. Content of the Utility Model

[0007] The purpose of the utility model is to provide a PCB adsorption welding detection device to solve the technical problem that the AOI in the prior art is only suitable for single-sided PCB boards, and it is necessary to manually flip the PCB board when detecting the other side of a double-sided PCB board, wasting too much time and resources.

[0008] To solve the above technical problem, the utility model specifically provides a PCB adsorption welding detection device, including:

[0009] Conveyor belts, two of which are symmetrically arranged to respectively carry both ends of the PCB board, and the space between the two conveyor belts is the detection interval;

[0010] AOI equipment, two of which are symmetrically arranged on the upper and lower sides of the detection interval respectively for detecting the front and back sides of the PCB board;

[0011] Elastic positioning blocks, a plurality of which are fixedly arranged at equal intervals on the two conveyor belts respectively. The arrangement directions of the plurality of elastic positioning blocks on each conveyor belt are parallel to the conveyor belt, and the elastic positioning blocks on the two conveyor belts are symmetrically arranged;

[0012] Conveyor rollers, which are arranged at both ends of the conveyor belt for driving the conveyor belt to operate, and the two conveyor rollers at the same end of the two conveyor belts are installed on the same rotating shaft.

[0013] As a preferred solution of the present invention, the elastic positioning block is set to be T-shaped, and the two right-angle included angles of the T-shaped elastic positioning block face the side where the detection area is located, so that one PCB board can be fixed on each side of the elastic positioning block.

[0014] As a preferred solution of the present invention, a positioning block is fixedly arranged on the side of the elastic positioning block facing away from the conveyor belt, and at least two positioning holes perpendicular to the conveyor belt are arranged on the positioning block;

[0015] Multiple groups of positioning posts are fixedly arranged on the conveyor belt, and a nut is threadedly connected to the upper end of each positioning post. The positioning posts are used for inserting into the positioning holes to fix the elastic positioning blocks.

[0016] As a preferred solution of the present invention, the conveyor roller corresponding to one of the conveyor belts is installed on the rotating shaft through a clamping expansion sleeve or a flange.

[0017] The present invention has the following beneficial effects compared with the prior art:

[0018] Place the PCB board in the placement area surrounded by the four elastic positioning blocks. As the conveyor belt operates driven by the conveyor roller, the PCB board on the conveyor belt moves towards the AOI device. The two AOI devices are respectively located on the upper and lower sides of the PCB board to simultaneously detect the front and back sides of the PCB board, improving the detection efficiency and saving time. Description of the Drawings

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained according to the provided drawings.

[0020] Figure 1 It is a schematic structural diagram of the PCB adsorption and welding detection device in the embodiment of the present invention;

[0021] Figure 2 ForFigure 1 Top view schematic diagram;

[0022] Figure 3 is Figure 2 Partial enlarged schematic diagram;

[0023] Figure 4 is Figure 1 Front view schematic diagram.

[0024] The labels in the figure are respectively represented as follows:

[0025] 1 - conveyor belt, 2 - AOI device, 3 - elastic positioning block, 4 - conveyor roller, 5 - detection interval, 6 - positioning hole, 7 - positioning post, 8 - positioning block, 9 - clamping expansion sleeve. Specific implementation mode

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

[0027] The present invention specifically provides a PCB adsorption welding detection device, including:

[0028] Conveyor belts 1, two conveyor belts 1 are symmetrically arranged to respectively carry both ends of the PCB board, and the space between the two conveyor belts 1 is the detection interval 5;

[0029] AOI devices 2, two AOI devices 2 are symmetrically arranged on the upper and lower sides of the detection interval 5 respectively for detecting the front and back sides of the PCB board;

[0030] Elastic positioning blocks 3, a plurality of elastic positioning blocks 3 are fixedly arranged at equal intervals on each of the two conveyor belts 1. The arrangement direction of the plurality of elastic positioning blocks 3 on each conveyor belt 1 is parallel to the conveyor belt 1, and the elastic positioning blocks 3 on the two conveyor belts 1 are symmetrically arranged; that is, four elastic positioning blocks 3 distributed in a rectangle on the two conveyor belts 1 enclose a placement area for placing the PCB board;

[0031] Conveyor rollers 4, arranged at both ends of the conveyor belt 1 for driving the conveyor belt 1 to operate, and the two conveyor rollers 4 at the same end of the two conveyor belts 1 are installed on the same rotating shaft.

[0032] It should be noted that in the drawings, only the upper half of the conveyor belt 1 is provided with elastic positioning blocks 3, but actually the elastic positioning blocks 3 are evenly arranged on the conveyor belt 1.

[0033] The method for detecting the solder joints of a PCB board using the above PCB adsorption welding detection device is as follows:

[0034] Place the PCB board in the placement area surrounded by the four elastic positioning blocks 3. As the conveyor belt 1 operates driven by the conveyor rollers 4, the PCB board on the conveyor belt 1 moves towards the AOI device 2. The two AOI devices 2 are respectively located on the upper and lower sides of the PCB board, detecting the front and back sides of the PCB board simultaneously, improving the detection efficiency and saving time.

[0035] It should be noted that the above conveyor belt 1 and conveyor rollers 4 both operate intermittently. During the pause of the conveyor belt 1, the AOI device 2 accurately captures the image of the PCB board.

[0036] Furthermore, in order to improve the utilization rate of the conveyor belt 1, that is, more PCB boards can be transported in one rotation of the conveyor belt 1, the elastic positioning block 3 is set to be T-shaped;

[0037] Both right-angle angles of the T-shaped elastic positioning block 3 face the side where the detection area 5 is located, so that both sides of the elastic positioning block 3 can respectively fix a PCB board.

[0038] That is, a placement area for placing the PCB board can be formed between adjacent elastic positioning blocks 3 on the two conveyor belts 1. For example, originally four elastic positioning blocks 3 can fix one PCB board, eight elastic positioning blocks 3 can fix two PCB boards, and now only six elastic positioning blocks 3 are needed to fix two PCB boards, and eight elastic positioning blocks 3 can fix three PCB boards.

[0039] Furthermore, a positioning block 8 is fixedly arranged on the side of the elastic positioning block 3 facing away from the conveyor belt 1, and at least two positioning holes 6 perpendicular to the conveyor belt 1 are arranged on the positioning block 8;

[0040] Multiple groups of positioning posts 7 are fixedly arranged on the conveyor belt 1, and a nut is threadedly connected to the upper end of each positioning post 7. The positioning post 7 is used to be inserted into the positioning hole 6 to fix the elastic positioning block 3.

[0041] The reason for arranging the positioning hole 6 on the elastic positioning block 3 and the positioning post 7 on the conveyor belt 1 is that during the cyclic rotation of the conveyor belt 1, the positioning posts 7 on the surface of the conveyor belt 1 will not undergo large deformation, and by arranging the positioning hole 6 on the deformable elastic positioning block 3, the elastic positioning block 3 can be fixed more reliably and permanently.

[0042] The number of positioning posts 7 is much larger than the number of elastic positioning blocks 3, and the installation position of the elastic positioning block 3 can be adjusted. Thus, the distance between two adjacent elastic positioning blocks 3 on the same conveyor belt 1 can be adjusted according to the width of the PCB board, achieving the purpose of adapting to PCB boards of different widths.

[0043] The positioning block 8 is arranged on the side of the elastic positioning block 3 facing away from the conveyor belt 1 to avoid interference between the positioning column 7 that cooperates with the positioning hole 6 and the PCB board.

[0044] Meanwhile, the positioning columns 7 can be arranged more densely, with a smaller distance between adjacent positioning columns 7, so that the adjustable scale of the distance between adjacent elastic positioning blocks 3 is smaller.

[0045] The reason for arranging two positioning holes 6 is to fix the elastic positioning block 3 more stably and avoid shaking or twisting of the elastic positioning block 3.

[0046] Furthermore, the conveyor roller 4 corresponding to one of the conveyor belts 1 is mounted on the rotating shaft through a clamping expansion sleeve 9 or a flange;

[0047] The motor for driving the rotating shaft is mounted on the side where the other conveyor belt 1 is located and is connected to the rotating shaft through a coupling.

[0048] After the conveyor roller 4 is mounted on the rotating shaft through the clamping expansion sleeve 9 or the flange, the position of the conveyor roller 4 on the rotating shaft can be adjusted. That is to say, the distance between the two conveyor rollers 4 on the same rotating shaft can be adjusted, and further the distance between the two conveyor belts 1 can be adjusted according to the length of the PCB board.

[0049] In summary, the above PCB adsorption welding detection device can be applicable to the double-sided synchronous detection of PCB boards with different lengths and widths.

[0050] The above embodiments are only exemplary embodiments of the present application and are not used to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements within the essence and protection scope of the present application, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the present application.

Claims

1. A PCB adsorption welding detection device, characterized in that: include: A conveyor belt (1), wherein two conveyor belts (1) are symmetrically arranged to respectively carry two ends of a PCB board, and the space between the two conveyor belts (1) is a detection zone (5); AOI equipment (2), wherein two AOI equipment (2) are symmetrically arranged on the upper and lower sides of the detection zone (5), and are respectively used to detect the front and back sides of the PCB board; Elastic positioning blocks (3), wherein a plurality of the elastic positioning blocks (3) are fixedly arranged at equal intervals on the two conveyor belts (1), the arrangement direction of the plurality of the elastic positioning blocks (3) on each conveyor belt (1) is parallel to the conveyor belt (1), and the elastic positioning blocks (3) on the two conveyor belts (1) are symmetrically arranged; The transmission rollers (4) are arranged at both ends of the transmission belt (1) and are used to drive the transmission belt (1) to operate, and the two transmission rollers (4) located at the same end of the two transmission belts (1) are installed on the same rotating shaft.

2. A PCB adsorption welding detection device according to claim 1, characterized in that: The elastic positioning block (3) is arranged in a T-shape, and the two right angles of the T-shaped elastic positioning block (3) both face the side where the detection zone (5) is located, so that a PCB board can be fixed on each of the two sides of the elastic positioning block (3).

3. A PCB adsorption welding detection device according to claim 2, characterized in that: A positioning block (8) is fixedly arranged on the side of the elastic positioning block (3) facing away from the conveyor belt (1), and the positioning block (8) is provided with at least two positioning holes (6) perpendicular to the conveyor belt (1); A plurality of groups of positioning posts (7) are fixedly arranged on the conveyor belt (1), and a nut is threadedly connected to the upper end of each positioning post (7). The positioning post (7) is used to be plugged into the positioning hole (6) to fix the elastic positioning block (3).

4. A PCB adsorption welding detection device according to claim 3, characterized in that: A transmission roller (4) corresponding to one of the transmission belts (1) is mounted on the rotating shaft via a clamping expansion sleeve (9) or a flange.

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