PCB (Printed Circuit Board) warping degree detection device

Abstract

The utility model relates to the field of PCB (Printed Circuit Board) detection devices, in particular to a PCB warping degree detection device, and aims to solve the technical problems that dust pollutants on the surface of a PCB influence signal emission and reception of a PCB warping tester and cause misjudgment of detection and identification; according to the technical scheme, the PCB warping degree detection device comprises a sorting area, a feeding area, a detection identification area, a displacement sensor, an assembly connecting piece, an air supply mechanism, a mobile platform, an air outlet assembly and an illumination assembly; by means of the air supply mechanism and the movable air outlet mechanism which are reasonably installed on the PCB warpage tester, surface wind power dust removal and cleaning can be carried out before warpage detection is carried out on a PCB, signal transmitting and receiving of the laser displacement sensor are prevented from being hindered by pollutants, and the phenomenon that PCB thickness curve data recognized by the detector are abnormal is avoided. Therefore, the detection accuracy is improved, and the problem of misjudgment of detection and identification caused by influence of dust pollutants on the surface of the PCB on signal emission and reception of the PCB bending tester is solved.

Description

Technical Field

[0001] The utility model relates to the field of PCB board detection devices, in particular to a PCB board warpage detection device. Background Art

[0002] In the design, processing and manufacturing of PCB boards, there are requirements for the warpage of the board body. Excessive warpage of the board will affect the patch processing. The traditional method of checking warpage is to use a plug gauge to manually detect the warpage height on a flat and smooth marble table. However, this manual detection is inefficient, has a large error value, and is inaccurate. Therefore, there are now automated board warpage testers on the market for PCB board warpage detection. Through optical detection of the board warpage height, the equipment automatically determines whether it is qualified or unqualified, and stores the detection record results. Qualified boards are transported upwards, and unqualified boards are sent downwards, which greatly improves the detection efficiency.

[0003] However, the PCB warpage tester uses a laser displacement sensor to emit and receive lasers to implement the test. This poses a problem. When large particles of dust impurities and flocculent fiber contaminants fall on the surface of the PCB board passing through the sensor, these contaminants will affect the signal transmission and reception of the laser displacement sensor, resulting in misjudgment of the detection, thereby affecting the accuracy of the warpage test.

[0004] Therefore, in view of the fact that the dust pollutants on the surface of the above-mentioned PCB board will hinder the signal transmission and reception of the laser displacement sensor on the PCB board warpage tester, resulting in misjudgment of detection and identification, a warpage tester with a PCB board surface dust removal function can be designed. Utility Model Content

[0005] In order to overcome the problem that dust pollutants on the surface of PCB boards affect the signal transmission and reception of PCB board warpage tester, resulting in misjudgment of detection and identification.

[0006] The technical scheme of the utility model is: a PCB warpage detection device, comprising a sorting area, a feeding area, a detection and identification area, a displacement sensor, an assembly connector, an air supply mechanism, a mobile platform, an air outlet component, and a lighting component; a cantilevered feeding area is arranged on one side of the sorting area, a detection and identification area is arranged on the other side of the sorting area, a displacement sensor is arranged between the detection and identification area and the sorting area, the PCB board is transported through the feeding area, the sorting area and the detection and identification area in sequence through a conveyor belt, the assembly connectors are arranged on the left and right sides of the sorting area, an air supply mechanism located below the feeding area is arranged between the assembly connectors, a mobile platform located above the sorting area is slidably installed between the upper ends of the assembly connectors, an air outlet component connected to the air supply mechanism through a hose is arranged on the mobile platform, and a rotating and retractable lighting component is arranged on the air outlet component.

[0007] Preferably, the board bending and warping tester composed of a sorting area, a loading area, a detection and identification area, a displacement sensor, etc. is an existing instrument used for detecting bending and warping of finished PCB boards or copper-clad boards, and automatically making OK / NG judgments and sorting according to the detection results. It can be used to detect bending and warping of boards before the finished PCB products are shipped, and can also be used to detect bending and warping of boards during the PCB process flow. The board size information and bending and warping tolerances can be freely set, and the array is unlimited. A high-precision CCD laser displacement sensor can be used to accurately identify bending and warping of PCB boards. It has high stability and is easy to use with other equipment in the process flow in combination with an online detection method. It has strong versatility and can automatically determine OK / NG according to design standards. It can be combined with an automatic board collection platform to automatically classify and collect boards to improve detection efficiency.

[0008] Preferably, the assembly connector includes an anchor plate, a slide rail, positioning holes, and a connecting frame; bolts are passed through the four corners of the anchor plate and connected to the left and right sides of the casing of the sorting area, the slide rail is welded and fixed on the anchor plate, a number of longitudinal through positioning holes are equidistantly provided on the slide rail, one end of the slide rail facing the loading area is fixedly connected to a connecting frame extending to the bottom of the loading area, after the slide rail is fixed to the sorting area through the anchor plate, it is combined with the connecting frame as a mounting platform for the air supply mechanism.

[0009] Preferably, the air supply mechanism includes a blower, a protective cover, and a buckle; the blower is fixedly installed between the connecting frames and below the loading area, a protective cover is provided on the outside of the blower, and the left and right ends of the protective cover are fixedly connected with buckles that are clamped on the corresponding connecting frames. The protective cover is clamped and fixed to the connecting frame by the buckle, which is convenient for installation and disassembly, and protects the body of the blower. The entire air supply mechanism is hidden below the loading area, which is more beautiful.

[0010] Preferably, the mobile platform includes a slide, a door frame, positioning pins and assembly holes; the slide is slidably connected to the slide rail, and a door frame composed of two columns and a crossbeam between the columns is fixedly connected between the upper ends of the slide, a pin hole is provided at the lower end of the slide, and a positioning pin matching the positioning hole is inserted into the pin hole, an assembly hole is opened in the middle of the door frame crossbeam, and the positioning pin is composed of a spring and a pin. After the slide moves to a suitable position along the slide rail, the pin is pulled into the corresponding positioning hole by the contraction of the spring, thereby locking the door frame in a suitable position.

[0011] Preferably, the air outlet assembly includes a hood, a limit plate, and a ventilation duct; the hood is located below the portal crossbeam, two limit plates are fixedly connected to the upper end of the hood, the portal crossbeam is located between the limit plates, the upper end of the hood is fixedly connected to a ventilation duct inserted in the assembly hole, the ventilation duct is a steel pipe with an external thread and is connected with a nut, the hood is suspendedly assembled and connected to the portal through the ventilation duct, and a limiting effect is generated between the limit plate and the portal frame to prevent the hood from rotating.

[0012] Preferably, the ventilation duct is connected to the air outlet of the wind hood, and a rubber hose for conveying air flow is connected between the air outlet of the blower and the ventilation duct. The blower conveys the air flow to the wind hood through the rubber hose and blows it toward the PCB boards in the sorting area to blow away the dust on the PCB boards.

[0013] Preferably, the lighting assembly includes a rotating connector, an extension rod, and a lamp; a rotating connector is installed on the side of the wind hood facing the detection and identification area, a telescopic extension rod is installed on the rotating connector, and a lamp is installed on the end of the extension rod. The rotating connector can use a rotating shaft structure or a hinge structure to control the rotation of the lamp to adjust the lighting angle. At the same time, the extension rod composed of multiple pipe fittings can adjust the distance between the lamp and the PCB board by relative stretching or contraction between the rods.

[0014] Beneficial effects of the utility model:

[0015] 1. Through the air supply mechanism and movable air outlet mechanism reasonably installed on the PCB warpage tester, the surface of the PCB board can be cleaned by wind power before the warpage test, so as to avoid the signal transmission and reception of the laser displacement sensor being blocked by pollutants, resulting in abnormal PCB board thickness curve data identified by the detector, thereby improving the detection accuracy;

[0016] 2. Through the lighting components installed on the air outlet mechanism, the lighting angle and area can be changed by manual adjustment, rotation or extension, which is convenient for the staff to inspect the PCB board after wind blowing and dust removal, and adjust the operating power of the air supply mechanism according to the inspection structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 What is shown is a first three-dimensional structural schematic diagram of a PCB board warpage detection device of the utility model;

[0018] Figure 2 The second three-dimensional structure schematic diagram of the PCB warpage detection device of the utility model is shown;

[0019] Figure 3 The figure shows a schematic diagram of the three-dimensional structure of the PCB warpage detection device of the utility model, which is equipped with connectors and an air supply mechanism;

[0020] Figure 4 The figure shows a three-dimensional structure diagram of a mobile platform of a PCB warpage detection device of the present invention;

[0021] Figure 5 What is shown is a first three-dimensional structural schematic diagram of the air outlet assembly and the lighting assembly of the PCB board warpage detection device of the utility model;

[0022] Figure 6What is shown is a second three-dimensional structural schematic diagram of the air outlet assembly and the lighting assembly of the PCB board warpage detection device of the present invention.

[0023] Explanation of the accompanying drawings: 1. Sorting area; 2. Loading area; 3. Detection and identification area; 4. Displacement sensor; 501. Anchor plate; 502. Slide rail; 503. Positioning hole; 504. Connecting frame; 601. Blower; 602. Protective cover; 603. Buckle; 701. Slide seat; 702. Door frame; 703. Positioning pin; 704. Assembly hole; 801. Wind cover; 802. Limit plate; 803. Ventilation duct; 901. Rotating connector; 902. Extension rod; 903. Lamp. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0025] See also Figure 1-2 The utility model provides an embodiment: a PCB board warpage detection device, comprising a sorting area 1, a feeding area 2, a detection and identification area 3, a displacement sensor 4, an assembly connector, an air supply mechanism, a mobile platform, an air outlet component, and a lighting component; a cantilevered feeding area 2 is arranged on one side of the sorting area 1, a detection and identification area 3 is arranged on the other side of the sorting area 1, a displacement sensor 4 is arranged between the detection and identification area 3 and the sorting area 1, the PCB board is transported by a conveyor belt to pass through the feeding area 2, the sorting area 1 and the detection and identification area 3 in sequence, the assembly connectors are installed on the left and right sides of the sorting area 1, an air supply mechanism located below the feeding area 2 is installed between the assembly connectors, a mobile platform located above the sorting area 1 is slidably installed between the upper ends of the assembly connectors, an air outlet component connected to the air supply mechanism through a hose is installed on the mobile platform, and a rotary The board bending and warping tester, which is composed of a sorting area 1, a loading area 2, a detection and identification area 3, a displacement sensor 4, etc., is an existing instrument used for detecting the bending and warping of PCB finished boards or copper-clad boards, and automatically makes OK / NG judgments and sorts them according to the detection results. It can be used to detect the bending and warping of boards before the finished PCB products are shipped, and can also be used to detect the bending and warping of boards during the PCB process. The size information of the board and the bending and warping tolerance of the board can be freely set, and the array is unlimited. The high-precision CCD laser displacement sensor can accurately identify the bending and warping of the PCB board. It has high stability and is easy to be used with other equipment in the process flow in combination with the online detection method. It has strong versatility and can automatically determine OK / NG according to the design standards. It can be matched with the automatic board collection platform to automatically classify and collect the boards to improve the detection efficiency.

[0026] See also Figure 3-4In this embodiment, the assembly connector includes an anchor plate 501, a slide rail 502, a positioning hole 503, and a connecting frame 504; the four corners of the anchor plate 501 are connected to the left and right sides of the casing of the sorting area 1 by bolts, and the slide rail 502 is welded and fixed on the anchor plate 501. The slide rail 502 is evenly spaced and has a plurality of longitudinally penetrating positioning holes 503. The end of the slide rail 502 facing the loading area 2 is fixedly connected to a connecting frame 504 extending to the bottom of the loading area 2. After the slide rail 502 is fixed to the sorting area 1 through the anchor plate 501, The connecting frame 504 is used as a mounting platform for the air supply mechanism, and the air supply mechanism includes a blower 601, a protective cover 602, and a buckle 603; the blower 601 is fixedly installed between the connecting frames 504 and is located below the loading area 2, and a protective cover 602 is sleeved on the outside of the blower 601. The left and right ends of the protective cover 602 are fixedly connected with buckles 603 that are clamped on the corresponding connecting frame 504. The protective cover 602 is clamped and fixed to the connecting frame 504 through the buckle 603, which is convenient for installation and removal, and protects the body of the blower 601. The whole air supply mechanism is hidden under the loading area 2, which is more beautiful. The mobile platform includes a slide 701, a door frame 702, a positioning pin 703, and an assembly hole 704. The slide 701 is slidably connected to the slide rail 502. The upper end of the slide 701 is fixedly connected with a door frame 702 composed of two columns and a crossbeam between the columns. The lower end of the slide 701 is provided with a pin hole, and a positioning pin 703 adapted to the positioning hole 503 is inserted in the pin hole. An assembly hole 704 is opened in the middle of the crossbeam of the door frame 702. The positioning pin 703 is It is composed of a spring and a pin. After the slide 701 moves to a suitable position along the slide rail 502, the pin is pulled into the corresponding positioning hole 503 through the contraction of the spring, and the door frame 702 is locked in a suitable position. The ventilation pipe 803 is connected with the air outlet of the wind cover 801. A rubber hose for conveying air flow is connected between the air outlet of the blower 601 and the ventilation pipe 803. The blower 601 conveys the air flow to the wind cover 801 through the rubber hose and blows it to the PCB board in the sorting area 1 to blow away the dust on the PCB board.

[0027] See also Figure 5-6In this embodiment, the air outlet assembly includes a hood 801, a limit plate 802, and a ventilation pipe 803; the hood 801 is located below the cross beam of the door frame 702, and the upper end of the hood 801 is fixedly connected to two limit plates 802, the cross beam of the door frame 702 is located between the limit plates 802, and the upper end of the hood 801 is fixedly connected to a ventilation pipe 803 inserted in the assembly hole 704, and the ventilation pipe 803 is a steel pipe with external threads and is connected with a nut. The hood 801 is suspended and assembled with the ventilation pipe 803 and the door frame 702 through the limit plate 802 to limit the hood 801 and the door frame 702, so as to avoid the hood 80 1 rotates, the lighting assembly includes a rotating connector 901, an extension rod 902, and a lamp 903; the rotating connector 901 is installed on the side of the wind cover 801 facing the detection and identification area 3, and a telescopic extension rod 902 is installed on the rotating connector 901, and a lamp 903 is installed on the end of the extension rod 902. The rotating connector 901 can use a rotating shaft structure or a hinge structure to control the lamp 903 to rotate and adjust the lighting angle. At the same time, the extension rod 902, which is a combination of multiple pipe fittings, can adjust the distance between the lamp 903 and the PCB board by relatively stretching or contracting the rods.

[0028] When working, the user slides the slide seat 701 along the slide rail 502 to a suitable position according to the use needs, and then automatically pushes the positioning pin 703 into the positioning hole 503 to fix the position of the wind cover 801. The blower 601 conveys the air flow to the wind cover 801 through the rubber hose and blows it to the PCB board on the sorting area 1;

[0029] The PCB board is transported from the loading area 2 to the sorting area 1 and the detection and identification area 3. During the transportation process, the PCB board passes under the wind cover 801, and the pollutants on the surface are blown away. At the same time, the user observes the cleaning effect of the pollutants on the surface of the PCB board through the lamp 903. The PCB board continues to be transported through the displacement sensor 4;

[0030] Using non-contact image measurement technology, a pair of high-precision laser displacement sensors 4, including a receiving device and a transmitting device, when the PCB board passes through the pair of displacement sensors 4, the place where the board is will block the signal emitted by the transmitting device, so that the signal at the corresponding position cannot be responded to on the receiving device. The board thickness curve of the PCB board can be found through the position information, and the board warpage is calculated through specific software algorithms and warpage definition, and the OK and NG boards are obtained according to the set judgment conditions.

[0031] Through the above steps, the air supply mechanism and the movable air outlet mechanism are reasonably installed on the PCB board warpage tester, so that the surface of the PCB board can be cleaned by wind dust removal before the warpage test is performed, so as to avoid the signal transmission and reception of the laser displacement sensor 4 being hindered by pollutants, causing abnormal PCB board thickness curve data identified by the detector, thereby improving the detection accuracy and solving the problem that the dust pollutants on the surface of the PCB board affect the signal transmission and reception of the PCB board warpage tester, causing misjudgment of detection and identification.

[0032] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A PCB warpage detection device, comprising a sorting area (1), a loading area (2), a detection and identification area (3), and a displacement sensor (4); characterized in that: The invention also comprises an assembly connector, an air supply mechanism, a mobile platform, an air outlet component and a lighting component; a cantilevered loading area (2) is arranged on one side of the sorting area (1); a detection and identification area (3) is arranged on the other side of the sorting area (1); a displacement sensor (4) is arranged between the detection and identification area (3) and the sorting area (1); PCB boards are transported by a conveyor belt and sequentially pass through the loading area (2), the sorting area (1) and the detection and identification area (3); assembly connectors are arranged on the left and right sides of the sorting area (1); an air supply mechanism located below the loading area (2) is arranged between the assembly connectors; a mobile platform located above the sorting area (1) is slidably arranged between the upper ends of the assembly connectors; an air outlet component connected to the air supply mechanism via a hose is arranged on the mobile platform; and a rotating and retractable lighting component is arranged on the air outlet component.

2. A PCB warpage detection device according to claim 1, characterized in that: The assembly connection parts include an anchor plate (501), a slide rail (502), a positioning hole (503), and a connecting frame (504); bolts are passed through the four corners of the anchor plate (501) and connected to the left and right sides of the casing of the sorting area (1); the slide rail (502) is welded and fixed on the anchor plate (501); a plurality of longitudinally penetrating positioning holes (503) are equidistantly provided on the slide rail (502); and a connecting frame (504) extending to the bottom of the loading area (2) is fixedly connected to one end of the slide rail (502) facing the loading area (2).

3. A PCB warpage detection device according to claim 2, characterized in that: The air supply mechanism comprises a blower (601), a protective cover (602), and a buckle (603); the blower (601) is fixedly installed between the connecting frames (504) and is located below the loading area (2); the outer side of the blower (601) is provided with a protective cover (602); the left and right ends of the protective cover (602) are fixedly connected with buckles (603) that are clamped on the corresponding connecting frames (504).

4. A PCB warpage detection device according to claim 3, characterized in that: The mobile platform comprises a slide seat (701), a door frame (702), a positioning pin (703), and an assembly hole (704); the slide seat (701) is slidably connected to the slide rail (502); a door frame (702) composed of two columns and a crossbeam between the columns is fixedly connected between the upper ends of the slide seat (701); a pin hole is provided at the lower end of the slide seat (701) and a positioning pin (703) adapted to the positioning hole (503) is inserted into the pin hole; and an assembly hole (704) is provided in the middle of the crossbeam of the door frame (702).

5. A PCB warpage detection device according to claim 4, characterized in that: The air outlet assembly comprises an air hood (801), a limiting plate (802), and a ventilation pipe (803); the air hood (801) is located below the cross beam of the door frame (702); the upper end of the air hood (801) is fixedly connected to two limiting plates (802); the cross beam of the door frame (702) is located between the limiting plates (802); the upper end of the air hood (801) is fixedly connected to a ventilation pipe (803) inserted into an assembly hole (704); the ventilation pipe (803) is a steel pipe with an external thread and is connected with a nut.

6. A PCB warpage detection device according to claim 5, characterized in that: The ventilation pipe (803) is connected to the air outlet of the wind cover (801), and a rubber hose for conveying air flow is connected between the air outlet of the blower (601) and the ventilation pipe (803).

7. A PCB warpage detection device according to claim 5, characterized in that: The lighting assembly comprises a rotating connection member (901), an extension rod member (902), and a lamp (903); the rotating connection member (901) is installed on the side of the wind shield (801) facing the detection and identification area (3), a telescopic extension rod member (902) is installed on the rotating connection member (901), and the lamp (903) is installed at the end of the extension rod member (902).

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