Integrity detection device for PCB bonding pad

Abstract

A PCB bonding pad integrity detection device comprises a rack, a detection device and a rotary working platform, the detection device and the rotary working platform are arranged on the rack, the rack comprises a base, an installation frame arranged on the base and a shell arranged on the outer side of the installation frame, and the detection device is arranged on the installation frame and comprises a CCD detection device and an electric detection device. The CCD detection device is arranged on the outer side of the upper portion, and the electric detection device is arranged over the working platform. The CCD detection device comprises a common light source and a high-exposure light supplement lamp, an electric detection needle is arranged on the bottom surface of the electric detection device, the electric detection device moves downwards, and the electric detection needle is in contact with a bonding pad to carry out electric performance detection; a rotating device is arranged below the working platform and drives the working platform to rotate. The device is high in detection precision, reasonable in structural layout, and high in practicality, and has relatively high popularization significance.

Description

TECHNICAL FIELD

[0001] The utility model relates to circuit board technical field especially relates to a kind of integrity detection device of PCB pad. BACKGROUND

[0002] With the continuous development of printed circuit board to integration, high density, high precision, high accuracy, fine aperture, fine wire, small pitch, high reliability, the design and manufacturing method of electronic product line is required higher and higher. The pads on the circuit board are more and more, and the distance between the pads is smaller and smaller. The abnormality of the pad and the solder paste printing on its outer surface, such as misalignment, less tin and short circuit, is more and more likely to occur. There are also related equipment for detecting circuit board pads. The equipment usually uses CCD to collect the picture of the circuit board surface pad above the circuit board under normal light conditions and compare it with the standard picture. However, this detection method has the problem of poor precision. UTILITY MODEL CONTENTS

[0003] Therefore, it is necessary to provide a kind of integrity detection device of PCB pad to solve the problems in the prior art.

[0004] A kind of integrity detection device of PCB pad, it includes rack and be set on the detection device and rotating work platform of rack, the rack includes base and be installed on the mounting bracket of base, be set on the outer side of mounting bracket Shell, the detection device is set on mounting bracket, it includes CCD detection device and electric measuring device, the CCD detection device is set on the upper side, electric measuring device is set on the directly above work platform;The CCD detection device includes ordinary light source and high exposure fill light, the bottom surface of electric measuring device is provided with electric measuring needle, electric measuring device moves downward, and electric measuring needle is in contact with pad to carry out electrical performance detection;Rotating device is provided below the work platform, and the rotating device drives the work platform to rotate.

[0005] Further, the electric measuring device includes driving device and electric measuring plate, the driving device is installed on the mounting bracket, and the electric measuring plate is set on the bottom end of driving device, and the driving device drives the electric measuring plate to move downward to the circuit board.

[0006] Further, the work platform includes bottom plate, two moving devices, top plate, rotating device and vacuum plate, the two moving devices are both installed on the bottom plate and drive the bottom plate to move in X axis, Y axis direction, the top plate is set above the bottom plate, the rotating device is set in the top plate, and the vacuum plate is set above the rotating device.

[0007] Further, the moving device includes fixed frame penetrating in the bottom plate and driving device installed on the fixed frame, one end of the driving device is installed on the fixed frame, and the other end is installed on the bottom plate, which drives the bottom plate to move along the fixed frame to adjust the position.

[0008] Furthermore, the rotating device includes a rotary drive, a drive gear, and a gear disk. A limiting boss is provided on the gear disk, and the limiting boss is embedded in the bottom surface of the vacuum plate. The rotary drive drives the gear disk to rotate via the drive gear, and the gear disk drives the vacuum plate to rotate via the limiting boss.

[0009] Furthermore, the vacuum tube of the vacuum plate extends from the toothed disc to the middle of the vacuum plate.

[0010] In summary, this PCB pad integrity detection device, through the combination of a CCD and a common light source, detects easily detectable anomalies such as misalignment, gearing, and distance. The combination of the CCD and a high-exposure supplementary light allows for more precise detection of anomalies such as insufficient solder, missing solder, and depressions on the pads. Furthermore, an electrical testing device is included to detect short circuits on the pads on the circuit board. This invention features a reasonable layout, high detection accuracy, strong practicality, and significant potential for widespread application. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of a PCB pad integrity detection device according to the present invention;

[0012] Figure 2 for Figure 1 A schematic diagram of the partial structure after the shell is removed;

[0013] Figure 3 for Figure 2 A schematic diagram of the structure of the testing platform;

[0014] Figure 4 for Figure 3 A schematic diagram of the rotating device. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0016] like Figures 1 to 4 As shown, this utility model provides a PCB pad integrity testing device, which includes a frame 10, a testing device 30 and a rotating work platform 20 disposed on the frame 10, and the testing device 30 is disposed above the work platform 20.

[0017] The rack 10 comprises a base 11 and a mounting frame 12 arranged on the base 11, the working platform 20 is arranged on the top surface of the base 11, and the detection device 30 is arranged on the mounting frame 12. The detection device 30 comprises a CCD detection device 31 and an electrical detection device 32, the CCD detection device 31 is arranged above one side of the working platform 20, the electrical detection device 32 is arranged directly above the working platform 20, and the bottom of the working platform 20 is provided with a rotating device 31. The working platform 20 can rotate horizontally, and the CCD detection device 31 can take pictures of the circuit board at various angles. In addition, the base 11 is also provided with a shell 13, and the working platform 20 and the detection device 30 are arranged in the shell 13. In this embodiment, the shell 13 is arranged to be opaque.

[0018] The outer side of the CCD detection device 31 is also provided with a general light source and a high-exposure light supplement lamp. First, the general light source is used in cooperation with the CCD detection device 31 to take pictures and detect the surface of the circuit board, and the surface pad pattern is obtained. Then, the general light source is turned off, and the shell is in a dark field without external light. Then, the high-exposure light supplement lamp is turned on to irradiate on the pad of the circuit board, and the CCD detection device 31 takes pictures of the circuit board again. At this time, under the action of the high-exposure light supplement lamp, the recesses and missing parts on the pad can be captured by the camera, while the normal smooth surface is not displayed, so that the defects can be intuitively displayed.

[0019] The electrical detection device 32 comprises an electrical detection driving device 321 and an electrical detection plate 322. The driving device 321 is arranged on the mounting frame 12, and the electrical detection plate 322 is arranged at the bottom end of the driving device 321. The driving device 321 drives the electrical detection plate 322 to move downward to the circuit board. The bottom surface of the electrical detection plate 322 is provided with electrical detection needles 323, which can contact the pad to detect the short circuit of the pad. Further, the number of the arranged positions of the electrical detection needles 323 is consistent with the number of the pads, so that the pads on the entire circuit board can be detected at one time.

[0020] The working platform 20 comprises a bottom plate 21, two moving devices 22, a top plate 23, a rotating device 24 and a vacuum plate 25. The two moving devices 22 are arranged on the bottom plate 21 and drive the bottom plate 21 to move in the X-axis and Y-axis directions. The top plate 23 is arranged above the bottom plate 21, the rotating device 24 is arranged in the top plate 23, and the vacuum plate 25 is arranged above the rotating device 24. The rotating device 24 drives the vacuum plate 25 to rotate. Specifically, the moving device 22 comprises a fixed frame 221 arranged in the bottom plate 21 and a driving device 222 arranged on the fixed frame 221. One end of the driving device 222 is arranged on the fixed frame 221, and the other end is arranged on the bottom plate 21. The driving device 222 can drive the bottom plate 21 to move along the fixed frame 221 to adjust the position.

[0021] The rotating device 24 comprises a rotating drive 241, a drive gear 242 and a toothed disc 243, a limiting boss 244 is arranged on the toothed disc 243, and the limiting boss 244 is embedded on the bottom surface of the vacuum plate 25. The rotating drive 241 drives the toothed disc 243 to rotate through the drive gear 242, and the toothed disc 243 drives the vacuum plate 25 to rotate through the limiting boss 244. In the embodiment, the vacuum tube 251 of the vacuum plate 25 extends from the toothed disc 243 to the middle of the vacuum plate 25. The vacuum plate 25 is used for adsorbing and positioning the PCB, and the rotatable structure is arranged to rotate the required cutting position to below the laser cutting device 30.

[0022] In summary, the PCB pad integrity detection device 30 of the utility model, through setting up CCD and ordinary light source cooperation to detect the conventional easy to find offset, gear, distance and other abnormalities, CCD and high exposure light supplement lamp cooperation can more accurate detection on the pad tin, less tin, concave abnormality; By setting up the electric measuring device 32, the short circuit of the pad on the circuit board is detected. The utility model has the advantages of reasonable layout, high detection precision, strong practicability and strong popularization significance.

[0023] The above-described embodiments only express two kinds of embodiments of the utility model, and the description is more specific and detailed, but it cannot be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection range of the utility model. Therefore, the protection range of the utility model patent should be subject to the appended claims.

Claims

1. A device for detecting the integrity of PCB pads, characterized in that: The utility model provides a kind of detection device, including rack and detection device and work platform arranged on rack, the rack includes pedestal and installation frame arranged on pedestal, shell arranged on the outside of installation frame, the detection device is arranged on installation frame, and it includes CCD detection device and electric measuring device, the CCD detection device is arranged on the outside, and electric measuring device is arranged on the directly above of work platform;The CCD detection device includes ordinary light source and high exposure fill light, the bottom surface of electric measuring device is provided with electric measuring needle, and electric measuring device moves downward, and electric measuring needle is contacted with pad to carry out electric performance detection;Rotary device is provided below the work platform, and the rotary device drives work platform to rotate.

2. The apparatus for integrity testing of a PCB pad of claim 1, wherein: The electric measuring device includes driving device and electric measuring plate, the driving device is installed on the installation frame, and the electric measuring plate is arranged on the bottom end of driving device, and the driving device drives electric measuring plate to move downward to circuit board.

3. The apparatus for integrity testing of a PCB pad of claim 2, wherein: The work platform includes bottom plate, two moving devices, top plate, rotary device and vacuum plate, two moving devices are installed on bottom plate and drive bottom plate to move in X axis, Y axis direction, top plate is arranged above bottom plate, rotary device is arranged in top plate, and vacuum plate is arranged above rotary device.

4. The apparatus for integrity testing of a PCB pad of claim 3, wherein: The moving device includes fixed frame passing in bottom plate and driving device installed on fixed frame, one end of driving device is mounted on fixed frame, and the other end is mounted on bottom plate, and it pushes bottom plate to move along fixed frame to carry out position adjustment.

5. The apparatus for integrity testing of a PCB pad of claim 1, wherein: The rotary device includes rotary drive, driving gear and toothed disc, limiting boss is arranged on toothed disc, and limiting boss is embedded on the bottom surface of vacuum plate;Rotary drive drives toothed disc to rotate through driving gear, and toothed disc drives vacuum plate to rotate through limiting boss.

6. The apparatus for integrity testing of a PCB pad of claim 5, wherein: Vacuum tube of vacuum plate extends from toothed disc, middle part to middle part of vacuum plate.

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