High-resolution transmission-type PCBA (Printed Circuit Board Assembly) defect detection device

Abstract

The utility model relates to the field of PCBA (Printed Circuit Board Assembly) detection, in particular to a high-resolution transmission type PCBA defect detection device. The technical problem to be solved by the utility model is to provide the high-resolution transmission-type PCBA defect detection device which can be used for automatically loading, unloading and placing PCBA, reducing the trouble of manual operation and improving the PCBA defect detection efficiency. A high-resolution transmission type PCBA defect detection device comprises a bottom plate, a conveying device, a placement block, a lifting device, a displacement device, a shooting mechanism, an irradiation device, a feeding and discharging device, a discharging device, a fixing rod, a fixing plate, a mounting frame, a first motor, a first guide rail, a first lead screw, a first screw block, a first sliding block, a lifting air cylinder, a fixing frame and a pneumatic suction cup. The PCBA automatic feeding and discharging device achieves the effects of automatically feeding, discharging and placing PCBA, reducing manual operation troubles and improving PCBA defect detection efficiency.

Description

Technical Field

[0001] The utility model relates to the field of PCBA detection, in particular to a high-resolution transmission-type PCBA defect detection device. Background Art

[0002] High-resolution transmission PCBA inspection is based on the penetrability of light. By irradiating the light source on one side of the PCBA, the light passes through the PCBA and is received by the high-resolution camera or sensor on the other side. Since the components, solder joints, circuits and other structures inside the PCBA have different absorption, reflection and scattering characteristics of light, the outlines and details of these structures will be displayed in the formed transmission image. By performing real-time analysis and processing of the transmission image, abnormal features that do not conform to the standard sample can be identified, thereby determining whether there are defects.

[0003] The existing high-resolution transmission PCBA inspection usually involves collecting the PCBA, manually installing the product on a mounting fixture and limiting the position, and then using a visual inspection camera to take photos of the product surface for inspection. However, this method is inefficient and requires frequent manual operations. Therefore, it is urgent to develop a high-resolution transmission PCBA defect inspection device that can automatically load and unload PCBAs, reduce the trouble of manual operations, and improve the efficiency of PCBA defect inspection. Utility Model Content

[0004] In order to overcome the shortcomings of the existing high-resolution transmission type PCBA detection, which usually involves collecting the PCBA and then manually installing the product on a mounting fixture and limiting it, and which is inefficient and requires frequent manual operations, the technical problem to be solved by the utility model is to provide a high-resolution transmission type PCBA defect detection device that can automatically load and unload PCBAs, reduce the trouble of manual operations, and improve the efficiency of PCBA defect detection.

[0005] The utility model is achieved by the following specific technical means:

[0006] A high-resolution transmission type PCBA defect detection device comprises a bottom plate, a conveying device is fixedly installed on the upper end of the bottom plate; a plurality of placement blocks are fixedly arranged on the conveying device; a lifting device fixedly connected to the bottom plate is arranged on one side of the conveying device; a displacement device is arranged on the lifting device; a shooting mechanism is arranged on the displacement device; an irradiation device fixedly connected to the bottom plate is arranged directly below the shooting mechanism;

[0007] The conveying device is a disc conveyor, with an electric indexing plate at the lower end and a disc-shaped conveying plate fixedly connected to the rotating output shaft of the electric indexing plate at the upper end; a plurality of placement blocks are evenly and equidistantly arranged at the upper end of the conveying plate, and placement grooves are arranged on the placement blocks; loading and unloading devices fixedly connected to the bottom plate are respectively arranged on both sides of the disc conveyor; a discharge device fixedly connected to the bottom plate is arranged below the loading and unloading devices;

[0008] The loading and unloading device includes two fixed rods fixedly connected to the base plate; a fixed plate is provided at the upper ends of the two fixed rods, and the fixed plate is fixedly connected between the two fixed rods; a mounting frame is fixedly installed on one side of the fixed plate; a first motor is fixedly connected to one side of the mounting frame; two first guide rails are provided on the side of the fixed frame away from the first motor, and the two first guide rails are respectively fixedly installed on the upper and lower ends of the fixed plate; a first screw rod is rotatably installed between the two first guide rails, one end of the first screw rod extends into the mounting frame and is fixedly connected to the rotating output shaft of the first motor; a first wire block is meshed and connected on the first screw rod; a first slider is slidably provided on the two guide rails, and the first slider is fixedly connected to the first wire block; a lifting cylinder is fixedly installed on the side of the first slider away from the first wire block; a fixed frame is fixedly installed on the telescopic rod of the lifting cylinder; a pneumatic suction cup is fixedly installed on one side of the fixed frame;

[0009] The material discharge device includes a fixed frame fixedly connected to the bottom plate; second guide rails are fixedly installed on both sides of the upper end of the fixed frame; a second slider is slidably arranged on the second guide rail; a material tray placement plate is fixedly installed on the upper end of the second slider; a second screw rod is also rotatably installed in the fixed frame; a second wire block is meshedly connected to the second screw rod, and the second wire block is fixedly connected to the material tray placement plate; a connecting plate is fixedly connected to one end of the fixed frame; a second motor is fixedly installed on the connecting plate, and the second motor's rotating output shaft extends to one side of the fixed frame and is fixedly connected to the second screw rod.

[0010] Furthermore, a soft silicone layer is provided on the inner wall surface of the placement groove provided in the center of the placement block, which plays the role of protecting the PCBA in the groove and preventing hard contact between the PCBA and the placement block.

[0011] Furthermore, the lifting cylinder is a double-rod gas rod, which has the effect of circumferential limiting to prevent the piston rod from circumferential rotation; and has high bending resistance to ensure the service life and guiding performance of the cylinder.

[0012] Furthermore, a positioning groove is provided on the upper surface of the tray placement plate, which plays a role in positioning the tray and facilitates the rapid placement of the tray.

[0013] Furthermore, the placement block is provided with an open groove that passes through the upper and lower ends of the placement block, and the corresponding conveying plate is provided with an opening that passes through the conveying plate and connects with the open groove provided on the placement block; this facilitates the irradiation device to pass the penetrating light source through the conveying plate and the placement block and irradiate the PCBA.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The utility model achieves the effect of automatically loading and unloading PCBAs, reducing the trouble of manual operation and improving the efficiency of PCBA defect detection.

[0016] By arranging loading and unloading devices and discharge devices on both sides of the conveying device, the effect of automatic loading and unloading is achieved, the trouble of manual placement is reduced, and the detection efficiency and detection effect are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0018] Figure 2 It is a side structural schematic diagram of the utility model.

[0019] Figure 3 It is a schematic diagram of a partial three-dimensional structure of the utility model.

[0020] Figure 4 It is a partial side structural schematic diagram of the utility model.

[0021] Figure 5 It is a schematic cross-sectional structural diagram of the conveying device of the utility model.

[0022] The marks in the accompanying drawings are: 1-bottom plate, 2-conveying device, 3-placing block, 4-lifting device, 5-displacement device, 6-shooting mechanism, 7-irradiation device, 8-loading and unloading device, 9-discharging device, 21-conveying plate, 22-electric dividing plate, 31-placing slot, 81-fixing rod, 82-fixing plate, 83-mounting frame, 84-first motor, 85-first guide rail, 86-first screw rod, 87-first wire block, 88-first slider, 89-lifting cylinder, 810-fixed frame, 811-pneumatic suction cup, 91-fixed frame, 92-second guide rail, 93-second slider, 94-tray placement plate, 95-second screw rod, 96-second wire block, 97-connecting plate, 98-second motor. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings: Example

[0024] A high-resolution transmission PCBA defect detection device, such as Figure 1-5As shown, it includes a bottom plate 1, a conveying device 2 is fixedly installed on the upper end of the bottom plate 1; a plurality of placement blocks 3 are fixedly arranged on the conveying device 2; a lifting device 4 fixedly connected to the bottom plate 1 is arranged on one side of the conveying device 2; the lifting device 4 is provided with a displacement device 5; a shooting mechanism 6 is arranged on the displacement device 5; an irradiation device 7 fixedly connected to the bottom plate 1 is arranged directly below the shooting mechanism 6;

[0025] The conveying device 2 is a disc conveyor, with an electric indexing plate 22 at the lower end and a disc-shaped conveying plate 21 fixedly connected to the rotating output shaft of the electric indexing plate 22 at the upper end; a plurality of placement blocks 3 are evenly and equidistantly arranged at the upper end of the conveying plate 21, and a placement groove 31 is arranged on the placement blocks 3; loading and unloading devices 8 fixedly connected to the bottom plate 1 are respectively arranged on both sides of the disc conveyor; a discharge device 9 fixedly connected to the bottom plate 1 is arranged below the loading and unloading devices 8;

[0026] The loading and unloading device 8 includes two fixed rods 81 fixedly connected to the bottom plate 1; a fixed plate 82 is provided at the upper ends of the two fixed rods 81, and the fixed plate 82 is fixedly connected between the two fixed rods 81; a mounting frame 83 is fixedly installed on one side of the fixed plate 82; a first motor 84 is fixedly connected to one side of the mounting frame 83; two first guide rails 85 are provided on the side of the fixed frame 810 away from the first motor 84, and the two first guide rails 85 are respectively fixedly installed on the upper and lower ends of the fixed plate 82; a first screw rod 86 is rotatably installed between the two first guide rails 85, and one end of the first screw rod 86 extends into the mounting frame 83 and is fixedly connected to the rotating output shaft of the first motor 84; a first wire block 87 is meshed and connected to the first screw rod 86; a first slider 88 is slidably provided on the two guide rails, and the first slider 88 is fixedly connected to the first wire block 87; a lifting cylinder 89 is fixedly installed on the side of the first slider 88 away from the first wire block 87; a fixed frame 810 is fixedly installed on the telescopic rod of the lifting cylinder 89; a pneumatic suction cup 811 is fixedly installed on one side of the fixed frame 810;

[0027] The material discharge device 9 includes a fixed frame 91 fixedly connected to the bottom plate 1; second guide rails 92 are fixedly installed on both sides of the upper end of the fixed frame 91; a second slider 93 is slidably arranged on the second guide rail 92; a material tray placement plate 94 is fixedly installed on the upper end of the second slider 93; a second screw rod 95 is also rotatably installed in the fixed frame 91; a second wire block 96 is meshingly connected to the second screw rod 95, and the second wire block 96 is fixedly connected to the material tray placement plate 94; a connecting plate 97 is fixedly connected to one end of the fixed frame 91; a second motor 98 is fixedly installed on the connecting plate 97, and the second motor 98 rotates The output shaft extends to one side of the fixed frame 91 and is fixedly connected to the second screw rod 95.

[0028] Working principle:

[0029] When in use, turn on the equipment, place the PCBA to be tested into the tray, and then place the plate on the tray placement plate 94 of the discharge device 9 on one side of the conveying device 2; place an empty tray on the tray placement plate 94 of the discharge device 9 on the other side of the conveying device 2; a positioning groove is provided on the upper end surface of the tray placement plate 94, which plays a positioning role for the tray, so that the tray can be placed quickly.

[0030] After the material tray is placed on the material tray placement plate 94 of the material discharge device 9 on both sides, the loading and unloading device 8 on the material discharge device 9 on one side starts to work, the first motor 84 rotates the output shaft to drive the first screw rod 86 to rotate, the first screw rod 86 drives the first wire block 87 to move, so that the first wire block 87 drives the first slider 88 connected thereto and the lifting gas rod on the first slider 88 to move, the lifting gas rod drives the fixed frame 810 and the pneumatic suction cup 811 to move above the material tray placement plate 94 of the material discharge device 9, and then the lifting gas rod works, the lifting cylinder 89 telescopic rod drives the pneumatic suction cup 811 fixedly installed on the fixed frame 810 to descend, the pneumatic suction cup 811 moves to one of the grooves where the material tray is placed at the upper end of the material tray placement plate 94, and then the pneumatic suction cup 811 sucks up the PCBA in the material tray groove, and then the lifting gas rod retracts, the first motor 84 reverses, drives the lifting gas rod to move to the conveying plate 21 of the conveying device 2, and then the lifting gas rod telescopic rod extends to suck up the PCBA sucked by the pneumatic suction cup 811 The PCBA is placed in the placement groove 31 of the placement block 3 provided on the conveying plate 21, and then the conveying plate 21 of the conveying device 2 intermittently rotates to one side under the drive of the electric indexing plate 22, and the PCBA in the placement groove 31 of the placement block 3 is conveyed to between the shooting mechanism 6 and the irradiation device 7; the irradiation device 7 irradiates the penetrating light source on one side of the PCBA, so that the light passes through the PCBA and is received by the shooting mechanism 6 on the other side; then the shooting mechanism 6 transmits the image to the image processing software to analyze the collected transmission image; then the conveying plate 21 of the conveying device 2 continues to convey the PCBA to one side, and when it is conveyed to the other side of the conveying device 2, the PCBA is taken out from the placement groove 31 of the placement block 3 provided on the conveying plate 21 through the loading and unloading device 8 provided on the other side and placed in the empty tray on the tray placement plate 94 of the discharge device 9 on the other side of the conveying device 2, and two empty trays are provided at the output end, which are respectively used to place the qualified PCBA and the unqualified PCBA.

[0031] By controlling the number of rotations of the output shaft of the first motor 84, the stop position of the pneumatic suction cup 811 can be controlled, thereby controlling the pneumatic suction cup 811 to absorb the PCBA in different grooves in the same row of the material tray; by controlling the number of rotations of the output shaft of the second motor 98, the stop position of the material tray placement plate 94 can be controlled, thereby enabling the pneumatic suction cup 811 to absorb the PCBA in different rows of grooves in the material tray.

[0032] By arranging the loading and unloading devices 8 and the unloading devices 9 on both sides of the conveying device 2, the effect of automatic loading and unloading is achieved, the trouble of manual placement is reduced, and the detection efficiency and detection effect are improved.

[0033] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be realized by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0034] Although the present disclosure has been described in detail with reference to the exemplary embodiments, the present disclosure is not limited thereto, and it will be apparent to those skilled in the art that various modifications and changes may be made thereto without departing from the scope of the present disclosure.

Claims

1. A high-resolution transmission-type PCBA defect detection device, comprising a base plate (1), a conveying device (2) being fixedly mounted on the upper end of the base plate (1); a plurality of placement blocks (3) being fixedly arranged on the conveying device (2); a lifting device (4) being fixedly connected to the base plate (1) being arranged on one side of the conveying device (2); a displacement device (5) being arranged on the lifting device (4); a shooting mechanism (6) being arranged on the displacement device (5); and an irradiation device (7) being fixedly connected to the base plate (1) being arranged directly below the shooting mechanism (6); It is characterized in that The conveying device (2) is a disc conveyor, the lower end of which is provided with an electric indexing plate (22), and the upper end of which is provided with a disc-shaped conveying plate (21) fixedly connected to the rotating output shaft of the electric indexing plate (22); a plurality of placement blocks (3) are evenly and equidistantly arranged at the upper end of the conveying plate (21), and placement grooves (31) are arranged on the placement blocks (3); loading and unloading devices (8) fixedly connected to the bottom plate (1) are respectively arranged on both sides of the disc conveyor; and a discharge device (9) fixedly connected to the bottom plate (1) is arranged below the loading and unloading devices (8); The loading and unloading device (8) comprises two fixed rods (81) fixedly connected to the bottom plate (1); a fixed plate (82) is provided at the upper ends of the two fixed rods (81), and the fixed plate (82) is fixedly connected between the two fixed rods (81); a mounting frame (83) is fixedly installed on one side of the fixed plate (82); a first motor (84) is fixedly connected to one side of the mounting frame (83); two first guide rails (85) are provided on the side of the fixed frame (810) away from the first motor (84), and the two first guide rails (85) are fixedly installed at the upper and lower ends of the fixed plate (82) respectively; a rotating shaft (85) is provided between the two first guide rails (85). A first screw rod (86) is provided, one end of the first screw rod (86) extends into the mounting frame (83) and is fixedly connected to the rotating output shaft of the first motor (84); a first screw block (87) is meshingly connected to the first screw rod (86); a first slider (88) is slidably provided on the two guide rails, and the first slider (88) is fixedly connected to the first screw block (87); a lifting cylinder (89) is fixedly installed on the side of the first slider (88) away from the first screw block (87); a fixing frame (810) is fixedly installed on the telescopic rod of the lifting cylinder (89); and a pneumatic suction cup (811) is fixedly installed on one side of the fixing frame (810); The material discharge device (9) comprises a fixed frame (91) fixedly connected to the bottom plate (1); second guide rails (92) are fixedly installed on both sides of the upper end of the fixed frame (91); a second slider (93) is slidably arranged on the second guide rail (92); a material tray placement plate (94) is fixedly installed on the upper end of the second slider (93); a second screw rod (95) is rotatably installed in the fixed frame (91); a second screw block (96) is meshingly connected to the second screw rod (95), and the second screw block (96) is fixedly connected to the material tray placement plate (94); a connecting plate (97) is fixedly connected to one end of the fixed frame (91); a second motor (98) is fixedly installed on the connecting plate (97), and the second motor (98) rotates The output shaft extends to one side of the fixed frame (91) and is fixedly connected to the second screw rod (95).

2. A high-resolution transmission-type PCBA defect detection device according to claim 1, characterized in that: The inner wall surface of the placement groove (31) provided at the center of the placement block (3) is provided with a soft silicone layer.

3. The high-resolution transmission-type PCBA defect detection device according to claim 1, characterized in that: The lifting cylinder (89) is a double-rod gas rod.

4. The high-resolution transmission-type PCBA defect detection device according to claim 1, characterized in that: A positioning groove is provided on the upper end surface of the tray placement plate (94).

5. The high-resolution transmission-type PCBA defect detection device according to claim 1, characterized in that: The placement block (3) is provided with an open groove penetrating the upper and lower ends of the placement block (3), and the corresponding conveying plate (21) is provided with an opening penetrating the conveying plate (21) and communicating with the open groove provided on the placement block (3).

Images