PCB detection equipment and detection method thereof

Abstract

The invention discloses PCB detection equipment and a detection method thereof, the PCB detection equipment comprises a rack, a turn-over transfer mechanism and two detection devices arranged on the rack at intervals, and each detection device comprises a material loading mechanism and a visual detection mechanism arranged above the material loading mechanism. The turnover transfer mechanism comprises a transfer mechanism and a turnover mechanism which are both arranged between the two detection devices, the turnover mechanism comprises a driving mechanism, a rotating shaft, a connecting rod and a holding structure, the driving mechanism is installed on the rack, one end of the rotating shaft is connected with the driving mechanism, the other end of the rotating shaft is connected with the connecting rod, and the holding structure is installed at the end, away from the rotating shaft, of the connecting rod; the rotating shaft extends in the horizontal direction, and the connecting rod is perpendicular to the rotating shaft. The transferring mechanism takes the PCB detected by the previous detection device and places the PCB on the holding structure, and the driving mechanism drives the holding structure to turn over to the position above the material carrying mechanism of the next detection device so that the turned PCB can be placed on the material carrying mechanism of the next detection device. According to the technical scheme, the detection efficiency can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of PCB detection, and in particular to a PCB detection device and a detection method thereof. Background Art

[0002] In recent years, the continuous development of information technology has led to the rapid development of PCB boards as an important part of information technology. In order to ensure that the output PCB boards (PCB boards) are qualified products, it is necessary to inspect the front and back sides of the PCB boards for defects during the production process. At present, some PCB inspection equipment is provided with an inspection area, a flipping mechanism and a manipulator. After the manipulator places the PCB board to be tested in the inspection area for one-side inspection, the flipping mechanism grabs the PCB board to be tested and flips it over. Finally, the manipulator puts the flipped PCB board back into the inspection area for the other side inspection. In this way, for qualified products, the previous PCB board needs to complete the double-sided inspection before the next PCB board can be inspected. In the process of the manipulator transferring the PCB board and the flipping mechanism flipping the PCB board, the inspection area does not work and is in an idle state, resulting in low inspection efficiency. Summary of the invention

[0003] The main purpose of the present invention is to provide a PCB detection device, aiming to improve the detection efficiency.

[0004] To achieve the above object, the PCB detection device proposed by the present invention includes:

[0005] frame;

[0006] Two detection devices, the two detection devices are installed on the frame at intervals, each of the detection devices comprises a loading mechanism and a visual detection mechanism arranged above the loading mechanism, the loading mechanism is used for placing PCB boards, and the visual detection mechanism is used for photographing the PCB boards on the loading mechanism;

[0007] A flip transfer mechanism, comprising a transfer mechanism and a flip mechanism, wherein the transfer mechanism and the flip mechanism are both arranged between the two detection devices, the flip mechanism comprises a drive mechanism, a rotating shaft, a connecting rod and a holding structure, the drive mechanism is mounted on the frame, one end of the rotating shaft is connected to the drive mechanism, and the other end is connected to the connecting rod, the holding structure is mounted on an end of the connecting rod away from the rotating shaft, the rotating shaft extends in a horizontal direction and is perpendicular to the direction from one of the detection devices to the other detection device, and the connecting rod is perpendicular to the rotating shaft;

[0008] The transfer mechanism is used to take the PCB board that has been inspected by the previous inspection device and place it on the holding structure. The driving mechanism is used to drive the holding structure to flip over to above the loading mechanism of the next inspection device, so as to place the flipped PCB board on the loading mechanism of the next inspection device.

[0009] Optionally, the transfer mechanism includes a lifting component and a suction component installed on the lifting component, the lifting component is installed on the frame, and the suction component is used to connect to a negative pressure generating device to suck the PCB board through the negative pressure generated by the negative pressure generating device.

[0010] Optionally, a support frame is provided on the frame, a transverse movement assembly is provided on the support frame, the transverse movement assembly extends in a direction from one of the detection devices to another detection device, the lifting assembly is installed on the transverse movement assembly, the holding structure has a receiving position and a placing position, at the receiving position, the holding structure is spaced apart from the loading mechanism of the previous detection device in the extension direction of the transverse movement assembly, and at the placing position, the holding structure is located above the loading mechanism of the next detection device.

[0011] Optionally, the suction assembly includes a first mounting plate, a fixing member and a first negative pressure suction head, the first mounting plate is provided with a first mounting hole extending vertically, the fixing member is provided with a second mounting hole extending vertically, the first mounting hole and the second mounting hole are both in the shape of long strips extending in a horizontal direction, and the length direction of the first mounting hole is perpendicular to the length direction of the second mounting hole, the fixing member is installed in the first mounting hole, and the negative pressure suction head is installed in the second mounting hole, so that the position of the first negative pressure suction head is adjustable.

[0012] Optionally, the holding structure includes a second mounting plate and a second negative pressure suction head mounted on the second mounting plate, and the second negative pressure suction head is used to connect to a negative pressure generating device to suck the PCB board through the negative pressure generated by the negative pressure generating device.

[0013] Optionally, the flipping mechanism further comprises a lifting cylinder, the lifting cylinder is mounted on the connecting rod, and the holding structure is fixed to the piston rod of the lifting cylinder.

[0014] Optionally, the loading mechanism includes a rotating seat and multiple loading seats, the rotating seat is rotatably mounted on the frame, the multiple loading seats are all mounted on the rotating seat and are arranged around the rotation axis of the rotating seat, the frame is provided with two detection positions above each of the rotating seats, when the rotating seat rotates, the multiple loading seats pass through the two detection positions in turn, each detection position is provided with a visual inspection mechanism, in the rotation direction of the rotating seat, the visual inspection mechanism located upstream is used to detect dirt on the PCB board, and the visual inspection mechanism located downstream is used to detect the quality of the PCB board after being inspected by the upstream visual inspection mechanism.

[0015] Optionally, there are four loading seats, and when the rotating seat stops rotating, two of the loading seats are respectively located below two detection positions; the rotating seat is arranged in a square shape, and each side position of the rotating seat corresponds to one loading seat.

[0016] Optionally, the loading mechanism includes a rotating seat and multiple loading seats, the rotating seat is rotatably mounted on the frame, the rotating seat is provided with multiple sliding tracks, the multiple sliding tracks are arranged in sequence head to tail along the circumference of the rotating seat, each of the loading seats is correspondingly installed on one of the sliding tracks, and the visual inspection mechanism is arranged above the rotating seat and arranged downward; the PCB inspection equipment also includes a driving assembly, the driving assembly is mounted on the frame or the rotating seat, the driving assembly is connected to the loading seat, and is used to drive the loading seat to move relative to the visual inspection mechanism, so that the visual inspection mechanism scans the PCB board on the loading seat.

[0017] Optionally, the driving assembly is mounted on the frame and is located below the rotating seat. The driving assembly is provided with a pushing structure. The pushing structure has a movable pushing member, and the pushing member is used to abut against the loading seat to push the loading seat to move along the sliding track.

[0018] Optionally, the loading seat has an abutment portion located below the rotating seat, and the pushing structure also includes a second seat body and an elastic member. The pushing member is hinged to the second seat body and has a pushing portion. The pushing portion gradually extends upward in the rotation direction of the rotating seat, and the elastic member abuts between the second seat body and the pushing member. When the rotating seat rotates until the loading seat is located above the driving assembly, the pushing portion abuts against the rear side of the abutment portion to push the loading seat to move along the sliding track.

[0019] Optionally, the PCB detection equipment also includes an elastic reset member, which is connected to the rotating seat and the loading seat, and the elastic reset member is elastically deformed when the driving assembly drives the loading seat to move. The elastic reset member is used to drive the loading seat to reset when the driving assembly drives the pushing structure to reset.

[0020] The present invention further provides a PCB detection method, which is applied to the PCB detection device as described above. The PCB detection method comprises the following steps:

[0021] The previous detection device detects the front side of the PCB board, receives the PCB board through the material loading mechanism of the previous detection device, photographs the front side of the PCB board on the material loading mechanism by using the corresponding visual detection mechanism, obtains the front side image information, and feeds the front side image information back to the algorithm system;

[0022] The flip transfer mechanism flips and moves the PCB board, and the transfer mechanism of the flip transfer mechanism takes the PCB board that has been inspected by the previous inspection device and places it on the holding structure of the flip mechanism. The driving mechanism of the flip mechanism drives the holding structure to flip, so that the PCB board on the holding structure is moved to the top of the loading mechanism of the next inspection device with the back side facing up;

[0023] The latter detection device detects the back side of the PCB board, receives the PCB board put down by the holding structure through the loading mechanism of the latter detection device, uses the corresponding visual detection mechanism to photograph the back side of the PCB board on the loading mechanism, obtains the back side image information, and feeds back the back side image information to the algorithm system.

[0024] The technical solution of the present invention is to set two detection devices on the PCB detection equipment, and set a transfer mechanism and a flip mechanism between the two detection devices, wherein the flip mechanism includes a driving mechanism, a rotating shaft, a connecting rod and a holding structure, the driving mechanism is installed on the frame, one end of the rotating shaft is connected to the driving mechanism, and the other end is connected to the connecting rod, the holding structure is installed at one end of the connecting rod away from the rotating shaft, the rotating shaft extends in the horizontal direction and is perpendicular to the direction of one of the detection devices pointing to the other detection device, and the connecting rod is perpendicular to the rotating shaft.

[0025] In this way, when inspecting the PCB board, one side of the PCB board to be inspected can be inspected by the previous inspection device first. After the inspection process is completed, the transfer mechanism is used to pick up the PCB board that has been inspected by the previous inspection device, and the PCB board is placed on the holding structure in the receiving position with the inspected side facing upward. Subsequently, the holding structure is driven by the driving mechanism to flip to the placement position with the rotating axis as the axis, so that the holding structure is located above the loading mechanism, so that the PCB board is placed on the loading mechanism with the inspected side facing downward, so that the uninspected side of the PCB board can be inspected by the subsequent inspection device.

[0026] After the transfer mechanism removes the PCB board after the previous detection device has completed the detection, the previous detection device can enter the next detection process, which can avoid the idleness of the detection device, improve the detection rhythm, and thus improve the detection efficiency. Moreover, after the PCB board is placed on the holding structure of the flipping mechanism through the transfer mechanism, the holding structure is driven by the driving mechanism to flip with the rotating axis as the axis, and the PCB board can be placed on the loading mechanism with the detected surface facing down. In this way, while moving the PCB board, the PCB board is also turned over, without the need to use a robot to move the flipped PCB board on the flipping mechanism to the next detection device. The transfer time of the PCB board between the two detection devices can be reduced, which can improve the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0028] Figure 1 This is a schematic diagram of the structure of a PCB detection device in an embodiment of the present invention after a part of the frame is removed;

[0029] Figure 2 for Figure 1 A schematic diagram of the structure of two detection devices and a flip transfer mechanism in a PCB detection device, wherein the holding structure is in a receiving position;

[0030] Figure 3 for Figure 2 A schematic diagram of the structure of the middle flip transfer mechanism;

[0031] Figure 4 for Figure 1 A schematic diagram of the structure of two detection devices and a flip transfer mechanism in a PCB detection device, wherein the holding structure is in a placement position;

[0032] Figure 5 for Figure 4 A schematic diagram of the structure of the middle flip transfer mechanism;

[0033] Figure 6 for Figure 1 Partial structural diagram of PCB testing equipment;

[0034] Figure 7 for Figure 6 The enlarged view of point A in the middle;

[0035] Figure 8 for Figure 7 The structural diagram of the middle rotating seat;

[0036] Fig. 9 for Figure 7 Schematic diagram of the structure of the middle loading seat;

[0037] Fig.10 for Figure 7 Schematic diagram of the structure of the drive component.

[0038] Description of Figure Numbers:

[0039] 10. Frame; 11. Loading position; 12. Loading manipulator; 13. Support frame; 131. Transverse movement assembly; 14. Support seat; 20. Detection device; 21. Rotating seat; 211. Sliding track; 212. Make way hole; 22. Loading seat; 221. First seat body; 222. Top plate; 223. Abutment portion; 224. Connecting portion; 225. Sliding block; 226. Mounting track; 227. Third negative pressure suction head; 228. Locking member; 23. Visual inspection mechanism; 231. Dirt detection camera; 232. Quality inspection camera; 40. Driving assembly; 41. Linear motor; 42. Propelling structure; 421. second seat body; 422. pushing member; 423. pushing part; 50. flip transfer mechanism; 51. transfer mechanism; 511. lifting assembly; 5111. driving cylinder; 5112. connecting block; 512. suction assembly; 5121. first mounting plate; 5122. first mounting hole; 5123. fixing member; 5124. second mounting hole; 5125. first negative pressure suction head; 52. flip mechanism; 521. driving mechanism; 522. rotating shaft; 523. connecting rod; 524. holding structure; 5241. second mounting plate; 5242. second negative pressure suction head; 5243. lifting cylinder.

[0040] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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. Based on the embodiments of 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.

[0042] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0043] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0044] The invention provides a PCB detection device.

[0045] In the embodiment of the present invention, please refer to Figures 1 to 10 The PCB inspection equipment includes a frame 10, a flip transfer mechanism 50 and two inspection devices 20. The two inspection devices 20 are installed on the frame 10 at intervals. Each inspection device 20 includes a loading mechanism and a visual inspection mechanism 23 arranged above the loading mechanism. The loading mechanism is used for placing PCB boards, and the visual inspection mechanism 23 is used for photographing the PCB boards on the loading mechanism.

[0046] The flipping transfer mechanism 50 includes a transfer mechanism 51 and a flipping mechanism 52. The transfer mechanism 51 and the flipping mechanism 52 are both arranged between the two detection devices 20. The flipping mechanism 52 includes a driving mechanism 521, a rotating shaft 522, a connecting rod 523 and a holding structure 524. The driving mechanism 521 is installed on the frame 10. One end of the rotating shaft 522 is connected to the driving mechanism 521, and the other end is connected to the connecting rod 523. The holding structure 524 is installed on the end of the connecting rod 523 away from the rotating shaft 522. The rotating shaft 522 extends in the horizontal direction and is perpendicular to the direction of one of the detection devices 20 pointing to the other detection device 20. The connecting rod 523 is perpendicular to the rotating shaft 522.

[0047] The transfer mechanism 51 is used to take the PCB board that has been inspected by the previous inspection device 20 and place it on the holding structure 524. The driving mechanism 521 is used to drive the holding structure 524 to flip over to above the loading mechanism of the next inspection device 20 to place the flipped PCB board on the loading mechanism of the next inspection device 20.

[0048] Specifically, the driving mechanism 521 is used to drive the holding structure 524 to flip between the receiving position and the placing position. When the holding structure 524 is at the receiving position, it is adjacent to the loading mechanism of the last detection device 20 to receive the PCB board on the transfer mechanism 51, that is, the transfer mechanism 51 is used to take the PCB board that has been inspected by the last detection device 20, and place the PCB board on the holding structure 524 at the receiving position with the inspected surface facing upward. After the driving mechanism 521 drives the holding structure 524 to flip from the top to the placing position with the rotating shaft 522 as the axis, the holding structure 524 is located above the loading mechanism, and the PCB board is placed on the loading mechanism with the inspected surface facing downward. The driving mechanism 521 can use a motor or a rotary cylinder as a driving member.

[0049] Optionally, the PCB detection device further includes a loading manipulator 12, and the frame 10 is provided with a loading position 11; one of the detection devices 20 is provided on the frame 10 and is located on one side of the loading position 11, and the loading manipulator 12 is installed on the frame 10 and is located above the loading position 11, and the loading manipulator 12 is used to transfer the PCB board in the loading position to the detection device 20. When in use, the PCB board to be detected can be placed on the loading position 11, and the loading manipulator 12 transfers the PCB board in the loading position 11 to the detection device 20 for detection. Of course, in other embodiments, the loading manipulator 12 may not be provided, for example, the PCB board is manually placed at the corresponding position of the detection device 20 for detection, or the PCB board is conveyed to the corresponding position of the detection device 20 by a conveyor belt for detection.

[0050] The technical solution of the present invention is to set two detection devices 20 in the PCB detection equipment, and set a transfer mechanism 51 and a flip mechanism 52 between the two detection devices 20, wherein the flip mechanism 52 includes a driving mechanism 521, a rotating shaft 522, a connecting rod 523 and a holding structure 524, the driving mechanism 521 is installed on the frame 10, one end of the rotating shaft 522 is connected to the driving mechanism 521, and the other end is connected to the connecting rod 523, the holding structure 524 is installed at one end of the connecting rod 523 away from the rotating shaft 522, the rotating shaft 522 extends in the horizontal direction and is perpendicular to the direction of one of the detection devices 20 pointing to the other detection device 20, and the connecting rod 523 is perpendicular to the rotating shaft 522.

[0051] In this way, when inspecting the PCB board, one side of the PCB board to be inspected can be inspected by the previous inspection device 20 first. After the inspection process is completed, the transfer mechanism 51 is used to take the PCB board that has been inspected by the previous inspection device 20, and the PCB board is placed on the holding structure 524 in the receiving position with the inspected side facing up. Subsequently, the holding structure 524 is driven by the driving mechanism 521 to flip to the placement position with the rotating shaft 522 as the axis, so that the holding structure 524 is located above the loading mechanism, so that the PCB board is placed on the loading mechanism with the inspected side facing down, so that the uninspected side of the PCB board can be inspected by the next inspection device 20.

[0052] After the transfer mechanism 51 removes the PCB board after the previous detection device 20 has completed the detection, the previous detection device 20 can enter the next detection process, which can avoid the situation where the detection device 20 is idle, and can improve the detection rhythm, thereby improving the detection efficiency. Moreover, after the PCB board is placed on the holding structure 524 of the flipping mechanism 52 through the transfer mechanism 51, the driving mechanism 521 drives the holding structure 524 to flip with the rotating shaft 522 as the axis, and the PCB board can be placed on the loading mechanism with the detected surface facing down. In this way, while moving the PCB board, the PCB board is also turned over, without the need to use a robot to move the flipped PCB board on the flipping mechanism 52 to the next detection device 20, which can reduce the transfer time of the PCB board between the two detection devices 20 and improve the detection efficiency.

[0053] In some embodiments, the transfer mechanism 51 includes a lifting assembly 511 and a suction assembly 512 installed on the lifting assembly 511, the lifting assembly 511 is installed on the frame 10, and the suction assembly 512 is used to connect the negative pressure generating device to suck the PCB board through the negative pressure generated by the negative pressure generating device. Specifically, the lifting assembly 511 includes a driving cylinder 5111 and a connecting block 5112 installed on the piston rod of the driving cylinder 5111, and the suction assembly 512 is installed on the connecting block 5112, so that the suction assembly 512 can be driven by the lifting assembly 511 to move up and down to pick and place the PCB board. Compared with the transfer mechanism 51 using a mechanical arm, this structure is simple. And the way of sucking the PCB board by the suction assembly 512 can avoid the PCB board from being damaged. Of course, in other embodiments, the transfer mechanism 51 includes a six-axis mechanical arm and a clamp or a suction cup provided on the mechanical arm, and the six-axis mechanical arm drives the clamp to clamp the PCB board or drives the suction cup to suck the PCB board. In addition, in other embodiments, the lifting assembly 511 includes an electric cylinder and a connecting block 5112 installed on the electric cylinder push rod.

[0054] In some embodiments, a support frame 13 is provided on the frame 10, and a transverse moving assembly 131 is provided on the support frame 13. The transverse moving assembly 131 extends in a direction from one detection device 20 to another detection device 20. The lifting assembly 511 is installed on the transverse moving assembly 131. The holding structure 524 has a receiving position and a placement position. In the receiving position, the holding structure 524 is spaced apart from the material loading mechanism of the previous detection device 20 in the extension direction of the transverse moving assembly 131. In the placement position, the holding structure 524 is located above the material loading mechanism of the next detection device 20. Specifically, when the holding structure 524 is in the receiving position, the holding structure 524 is located between the two detection devices 20 and is spaced apart from the material loading mechanism of the previous detection device 20 in the extension direction of the transverse moving assembly 131. In this way, when the holding structure 524 flips to the receiving position, when the lifting assembly 511 drives the suction assembly 512 to take the PCB board from the material loading mechanism and move up and down, the holding structure 524 and the suction assembly 512 do not interfere with each other. When the lifting assembly 511 makes the PCB board on the suction assembly 512 higher than the holding structure 524, the lateral movement assembly 131 drives the suction assembly 512 to move to the top of the holding structure 524, so that the PCB board can be placed on the holding structure 524. After the suction assembly 512 is moved away, the driving mechanism 521 can drive the holding structure 524 to flip to the placement position, so that the holding structure 524 is located above the loading mechanism of the next detection device 20, so that the PCB board can be placed on the loading mechanism with the detected surface facing downward. Among them, the lateral movement assembly 131 can use a cylinder or an electric cylinder as a driving member.

[0055] In some embodiments, the suction assembly 512 includes a first mounting plate 5121, a fixing member 5123, and a first negative pressure suction head 5125. The first mounting plate 5121 is provided with a first mounting hole 5122 that runs through from top to bottom, and the fixing member 5123 is provided with a second mounting hole 5124 that runs through from top to bottom. The first mounting hole 5122 and the second mounting hole 5124 are both in the shape of long strips extending in the horizontal direction, and the length direction of the first mounting hole 5122 is perpendicular to the length direction of the second mounting hole 5124. The fixing member 5123 is installed in the first mounting hole 5122, and the negative pressure suction head is installed in the second mounting hole 5124, so that the position of the first negative pressure suction head 5125 is adjustable. Specifically, the first mounting hole 5122 is in the shape of a long strip extending in the extension direction of the rotating shaft 522, and the second mounting hole 5124 is in the shape of a long strip extending in the distribution direction of the two detection devices 20 (the extension direction of the transverse movement assembly 131). Thus, when in use, the position of the first negative pressure suction head 5125 can be adjusted in the horizontal direction by adjusting the position of the fixing member 5123 in the first mounting hole 5122 and adjusting the position of the first negative pressure suction head 5125 in the second mounting hole 5124, so that the first negative pressure suction head 5125 can better cooperate with the PCB board. The first negative pressure suction head 5125 can be a suction cup or a suction nozzle, etc.

[0056] In some embodiments, the holding structure 524 includes a second mounting plate 5241 and a second negative pressure suction head 5242 mounted on the second mounting plate 5241, and the second negative pressure suction head 5242 is used to connect to a negative pressure generating device to suck the PCB board through the negative pressure generated by the negative pressure generating device. Specifically, the second negative pressure suction head 5242 can be a suction cup or a suction nozzle. When in the receiving position, the suction port of the second negative pressure suction head 5242 faces upward, and when in the placement position, the suction port of the second negative pressure suction head 5242 faces downward. By connecting the second negative pressure suction head 5242 to the negative pressure generating device, negative pressure can be generated at the suction port of the second negative pressure suction head 5242 by the negative pressure generating device, so that when the PCB board is placed on the second negative pressure suction head 5242, the PCB board can be adsorbed. When the PCB board is moved to the top of the loading mechanism of the next detection device 20, the negative pressure generating device is turned off or the air path between the negative pressure generating device and the second negative pressure suction head 5242 is disconnected, and the PCB board can be put down from the second negative pressure suction head 5242, which can also avoid the PCB board from being damaged. Of course, in other embodiments, the holding structure 524 is provided with a clamping claw to clamp the PCB board.

[0057] In some embodiments, the flip mechanism 52 further includes a lifting cylinder 5243, the lifting cylinder 5243 is mounted on the connecting rod 523, and the holding structure 524 is fixed to the piston rod of the lifting cylinder 5243. Specifically, when the holding structure 524 is flipped to the placement position, the PCB board can be spaced apart from the loading mechanism below, and the lifting cylinder 5243 drives the holding structure 524 to move downward, so that the PCB board is placed on the loading mechanism. In this way, it is not necessary to make the holding structure 524 just contact the loading mechanism when it is in the placement position, which can reduce the matching accuracy requirements of the flip mechanism 52, and can be applicable to various types of PCB board detection. Of course, in other embodiments, it can also be arranged so that the holding structure 524 can just place the PCB board on the loading mechanism when it is in the placement position.

[0058] In some embodiments, a support frame 13 is provided on the frame 10, and the driving member and the transfer mechanism 51 are both mounted on the support frame 13. Specifically, the support frame 13 is detachably mounted on the frame 10. In this way, the driving member and the transfer mechanism 51 are both mounted on the support frame 13, which facilitates the positioning and matching of the flip mechanism 52 and the transfer mechanism 51, and also allows the transfer mechanism 51, the flip mechanism 52 and the support frame 13 to form a whole module, which is convenient for assembly.

[0059] In some embodiments, a support base 14 is provided on the frame 10, and the rotating shaft 522 is rotatably mounted on the support base 14, and the support base 14 is located between the driving mechanism 521 and the connecting rod 523, or the support base 14 is located on the side of the connecting rod 523 away from the driving mechanism 521. In this way, the rotating shaft 522 can be effectively supported and the stability of the rotating shaft 522 can be improved.

[0060] In some embodiments, the loading mechanism includes a rotating seat 21 and a plurality of loading seats 22. The rotating seat 21 is rotatably mounted on the frame 10 (the rotation direction of the rotating seat 21 is referenced to Figure 6 A plurality of material carriers 22 are mounted on the rotating seat 21 and are arranged in a line around the rotating axis 522 of the rotating seat 21. The frame 10 is provided with two inspection positions above each rotating seat 21. When the rotating seat 21 rotates, the plurality of material carriers 22 pass through the two inspection positions in sequence. Each inspection position is provided with a visual inspection mechanism 23. In the rotation direction of the rotating seat 21, the visual inspection mechanism 23 located upstream is used to detect dirt on the PCB board, and the visual inspection mechanism 23 located downstream is used to detect the quality of the PCB board after being inspected by the upstream visual inspection mechanism 23.

[0061] Specifically, the PCB inspection device further includes a driving device, which is mounted on the frame 10 and is drivingly connected to the rotating seat 21 to drive the rotating seat 21 to rotate. In the rotation direction of the rotating seat 21, the visual inspection mechanism 23 located upstream includes a dirt detection camera 231, and the visual inspection mechanism 23 located downstream includes a quality inspection camera 232. That is, the quality inspection camera 232 is located downstream of the dirt detection camera 231.

[0062] When in use, first place the PCB board on the loading seat 22 near the loading position 11, and rotate the rotating seat 21 so that the loading seat 22 equipped with the PCB board moves to the bottom of the dirt detection camera 231 (while another adjacent loading seat 22 moves to the position close to the loading position 11), and the PCB board is photographed by the dirt detection camera 231 to detect whether there is stain on the PCB board. After the dirt detection camera 231 completes the detection, the rotating seat 21 rotates so that the PCB board after the dirt detection camera 231 is detected moves to the bottom of the quality detection camera 232, and the PCB board is photographed by the quality detection camera 232 to detect the quality of the PCB board (for example, whether there are welding defects, scratches, wrong position and spacing of wires and components, wrong size of circuits and components, wrong shape of components, on-off of circuits, etc.). Optionally, the dirt detection camera 231 and the quality detection camera 232 are both CCD cameras.

[0063] Among them, when the dirt detection camera 231 detects that the PCB board is dirty, the PCB board on the carrier 22 can be directly removed by a set manipulator or manually, or after passing through the quality inspection camera 232 (quality inspection is not required at this time), the dirty PCB board and the qualified PCB board can be separated at the final unloading (because the PCB board has an identification code, the identification code can be scanned by a barcode scanner before inspection, so they can be distinguished during unloading). Similarly, when the quality inspection camera 232 detects that the PCB board has defects, the PCB board on the carrier 22 can be directly removed by a set manipulator or manually, or after subsequent inspection processes, the unqualified PCB board and the qualified PCB board can be separated at the final unloading.

[0064] By arranging the dirt detection camera 231 in front of the quality detection camera 232, the dirt detection camera 231 is used to detect whether there are stains on the PCB board during the detection, so that the dirty PCB board can be screened out, and the situation that the PCB board is misjudged due to the presence of stains on the PCB board can be avoided, thereby improving the accuracy of PCB board detection. In addition, the rotation of the rotating seat 21 drives the rotation of multiple material carriers 22, so that the PCB board on the material carrier 22 passes through the dirt detection camera 231 and the quality detection camera 232 in turn, so that the multiple material carriers 22 are recycled and continuously transported for detection, which can improve the efficiency of PCB board detection, and can make the overall structure of the detection device 20 compact, which is conducive to reducing the size of the PCB detection equipment.

[0065] In some embodiments, there are four loading seats 22. When the rotating seat 21 stops rotating, two of the loading seats 22 are respectively located below two detection positions. The rotating seat 21 is square in shape, and a loading seat 22 is correspondingly provided at each side position of the rotating seat 21.

[0066] Specifically, when the rotating seat 21 stops rotating, two of the loading seats 22 are respectively located below the two detection positions (equivalent to the detection station), another loading seat 22 is adjacent to the loading position 11 (equivalent to the loading station), and the last loading seat 22 is adjacent to the flip transfer mechanism 50 (equivalent to the unloading station). That is, during the detection process, each loading seat 22 is located at a station (loading station, unloading station and two detection stations) to perform the corresponding process, avoiding the situation where there are idle loading seats 22, which can not only improve the detection efficiency, but also improve the compact structure of the PCB detection equipment, which is conducive to reducing the size of the PCB detection equipment. Of course, the present invention is not limited to this. In other embodiments, the number of the loading seats 22 can also be three (at this time, a manipulator can be set at each detection position to directly remove the dirty PCB board when the dirty detection camera 231 detects the dirty PCB board, and directly remove the qualified or unqualified PCB board after the quality detection camera 232 detects it) or five, etc.

[0067] In some embodiments, the rotating seat 21 is arranged in a square shape, and each side position of the rotating seat 21 corresponds to a material loading seat 22. By arranging the material loading seats 22 at the side positions of the square rotating seat 21, the space for placing the PCB board on each material loading seat 22 is large, which can be suitable for long strip PCB boards and small PCB boards, thereby improving the compatibility of the PCB detection equipment. Of course, in other embodiments, the rotating seat 21 can also be arranged in a circular shape, etc.

[0068] In some embodiments, the loading seat 22 includes a first seat body 221 and a third negative pressure suction head 227 mounted on the first seat body 221, the third negative pressure suction head 227 is arranged upward, and the third negative pressure suction head 227 is used to connect the negative pressure generating device to adsorb the PCB board on the loading seat 22. Specifically, the third negative pressure suction head 227 can be a suction cup or a suction nozzle, and the suction port of the third negative pressure suction head 227 is upward. The third negative pressure suction head 227 is connected to the negative pressure generating device, and the negative pressure generating device can generate negative pressure at the suction port of the third negative pressure suction head 227, so that when the PCB board is placed on the third negative pressure suction head 227, the PCB board can be adsorbed, thereby preventing the PCB board from falling or shifting during the transfer and detection process. When the PCB board is moved to a suitable position (transfer position), the negative pressure generating device is turned off or the air path between the negative pressure generating device and the third negative pressure suction head 227 is disconnected, that is, the PCB board can be removed from the third negative pressure suction head 227. This can also avoid clamping the PCB board. Of course, in other embodiments, a clamping claw is provided on the carrier 22 to clamp the PCB board.

[0069] In some embodiments, the loading seat 22 includes a plurality of third negative pressure suction heads 227, a mounting track 226 is provided on the first seat body 221, and the plurality of third negative pressure suction heads 227 can be slidably mounted on the mounting track 226, and a locking member 228 is provided on the third negative pressure suction head 227, and the locking member 228 is used to fix the third negative pressure suction head 227 on the mounting track 226. Specifically, the locking member 228 is a screw, which is screwed to the third negative pressure suction head 227 and can abut against the mounting track 226. Such provision of a plurality of third negative pressure suction heads 227 can increase the contact area between the loading seat 22 and the PCB board, can further reduce the risk of the PCB board falling or shifting, and can better absorb the long strip PCB board. Of course, in other embodiments, the locking member 228 can also be a pin.

[0070] In some embodiments, two mounting rails 226 arranged side by side are provided on the first seat body 221, and a plurality of third negative pressure suction heads 227 are provided on each mounting rail 226. Specifically, two dirt detection cameras 231 arranged side by side are provided at the upstream detection position, and each dirt detection camera 231 is correspondingly located above one mounting rail 226, and two quality detection cameras 232 arranged side by side are provided at the downstream detection position, and each quality detection camera 232 is correspondingly located above one mounting rail 226. During the inspection, a plurality of third negative pressure suction heads 227 on each mounting rail 226 can adsorb a PCB board, that is, two PCB boards can be placed on a loading seat 22 at the same time for inspection, which can improve the inspection efficiency. Optionally, the transfer mechanism 51 is provided with two rows of first negative pressure suction heads 5125, and the holding structure 524 is provided with two rows of second negative pressure suction heads 5242. In addition, in other embodiments, the same PCB board (for example, a larger PCB board) can also be adsorbed by the third negative pressure suction heads 227 on the two mounting rails 226.

[0071] In some embodiments, the loading mechanism includes a rotating seat 21 and multiple loading seats 22. The rotating seat 21 is rotatably mounted on the frame 10. A plurality of sliding rails 211 are provided on the rotating seat 21. The plurality of sliding rails 211 are arranged in sequence head to tail along the circumference of the rotating seat 21. Each loading seat 22 is correspondingly installed on a sliding rail 211. The visual inspection mechanism 23 is arranged above the rotating seat 21 and is arranged downward. The PCB inspection equipment also includes a driving assembly 40. The driving assembly 40 is mounted on the frame 10 or the rotating seat 21. The driving assembly 40 is connected to the loading seat 22 to drive the loading seat 22 to move relative to the visual inspection mechanism 23, so that the visual inspection mechanism 23 scans the PCB board on the loading seat 22.

[0072] Specifically, the visual inspection mechanism 23 (such as a CCD camera) is used to photograph the PCB board on the carrier 22 to detect whether there are defects in the PCB board (such as welding defects, scratches, incorrect position and spacing of wires and components, incorrect size of circuits and components, incorrect component shape, disconnection of circuits, dirt, etc.).

[0073] In the initial state, the loading seat 22 is located at one end of the sliding track 211. When the rotating seat 21 is rotated to move the loading seat 22 equipped with the PCB board to the bottom of the visual inspection mechanism 23, the rotating seat 21 stops rotating, and then the driving assembly 40 drives the loading seat 22 to move along the sliding track 211, and the PCB board passes under the visual inspection mechanism 23, so that the visual inspection mechanism 23 scans the PCB board on the loading seat 22 to inspect the entire PCB board.

[0074] By providing a plurality of sliding rails 211 on the rotating seat 21, the plurality of sliding rails 211 are arranged in sequence head to tail along the circumference of the rotating seat 21, each sliding rail 211 is provided with a material carrier 22, and a driving assembly 40 is provided on the frame 10 or the rotating seat 21, so that the driving assembly 40 is connected to the material carrier 22. During detection, the material carrier 22 can be driven by the driving assembly 40 to move along the sliding rails 211, and the PCB board can pass under the visual inspection mechanism 23, so that the visual inspection mechanism 23 can scan the PCB board on the material carrier 22 to detect the entire PCB board. In this way, the PCB board is driven by the material carrier 22 to pass under the visual inspection mechanism 23, and the visual inspection mechanism 23 can capture the entire PCB board without adjusting the height of the visual inspection mechanism 23, which can avoid the situation where the detection accuracy is reduced due to the excessive height of the visual inspection mechanism 23, improve the detection accuracy of the PCB board, and reduce the risk of misjudgment of the PCB board. Moreover, it can be applied to PCB boards of various specifications, and improve the compatibility of PCB detection equipment.

[0075] In some embodiments, the driving assembly 40 is mounted on the frame 10 and is located below the rotating seat 21. The driving assembly 40 is provided with a pushing structure 42. The pushing structure 42 has a movable pushing member 422. The pushing member 422 is used to abut the material carrier 22 to push the material carrier 22 to move along the sliding track 211. Specifically, the pushing member 422 has an abutting position and a retreat position that moves downward relative to the abutting position. When the pushing member 422 is in the abutting position, the pushing member 422 abuts against the material carrier 22 to push the material carrier 22 to move along the sliding track 211 under the action of the driving assembly 40. When the pushing member 422 is in the retreat position, the pushing member 422 is located outside the movement path of the material carrier 22 when the rotating seat 21 rotates, so as to avoid interference between the rotating seat 21 and the material carrier 22 when the rotating seat 21 rotates. In this way, the drive component 40 is arranged on the frame 10 and is located below the rotating seat 21. Compared with the method of installing the drive component 40 on the rotating seat 21, the drive component 40 can be set only at the position below the visual inspection mechanism 23, and there is no need to set a drive component 40 for each loading seat 22 on the rotating seat 21. The number of drive components 40 can be reduced, the structure of the rotating seat 21 and the PCB inspection equipment can be simplified, the production cost can be reduced, and the overall weight of the rotating seat 21 can be reduced.

[0076] In some embodiments, the loading seat 22 has an abutment portion 223 located below the rotating seat 21, and the pushing structure 42 also includes a second seat body 421 and an elastic member. The pushing member 422 is hinged to the second seat body 421 and has a pushing portion 423. The pushing portion 423 gradually extends upward in the rotation direction of the rotating seat 21, and the elastic member abuts between the second seat body 421 and the pushing member 422. When the rotating seat 21 rotates until the loading seat 22 is located above the driving assembly 40, the pushing portion 423 abuts against the rear side of the abutment portion 223 to push the loading seat 22 to move along the sliding track 211.

[0077] Specifically, the elastic member is in a compressed state and has a driving force to drive the push member 422 to move from the avoidance position to the abutment position. When the rotating seat 21 rotates, since the upper side of the push is inclined, the abutment portion 223 can press the push member 423 downward when abutting the upper side of the push member 423, so that the push member 422 is in the avoidance position, and when the abutment portion 223 as a whole passes over the push member 423, under the action of the elastic member, the push member 422 automatically switches to the abutment position, so that it can abut against the rear side of the abutment portion 223. After the rotating seat 21 stops rotating, it can push the material carrier 22 to move along the sliding track 211 under the drive of the driving assembly 40. In this way, there is no need to set an electric control structure to control the movement of the push member 422, the structure is simple, the structure of the driving assembly 40 can be simplified, and the production cost of the PCB detection equipment can be reduced. Among them, the elastic member can be a compression spring, a spring or a rubber block, etc. Of course, in other embodiments, a motor or a cylinder may be provided on the driving assembly 40 to drive the pusher 422 to move between the abutting position and the avoiding position.

[0078] In some embodiments, the PCB detection device further comprises an elastic reset member, which is connected to the rotating seat 21 and the material carrier 22. The elastic reset member is elastically deformed when the driving assembly 40 drives the material carrier 22 to move. The elastic reset member is used to drive the material carrier 22 to reset when the driving assembly 40 drives the pushing structure 42 to reset. Specifically, the elastic reset member can be a compression spring or a tension spring. When the driving assembly 40 drives the material carrier 22 to move along the sliding track 211, the elastic reset member is in a compressed state or a stretched state, so as to have a tendency to drive the material carrier 22 to reset. In this way, when the detection is completed, when the driving assembly 40 moves in the opposite direction and resets, the material carrier 22 can also be automatically reset under the action of the elastic reset member. Such a structure is simple and reliable, and the structure of the material carrier 22 can be simplified. Of course, in other embodiments, a magnet can also be set at a position where the abutting portion 223 and the pushing portion 423 contact each other, so that when the driving assembly 40 drives the pushing member 422 to reset, the material carrier 22 is driven to reset by the magnetic attraction between the abutting portion 223 and the pushing portion 423.

[0079] In some embodiments, the material carrier 22 includes a first seat body 221 and a plurality of third negative pressure suction heads 227, the first seat body 221 is mounted on the sliding track 211, and two mounting tracks 226 arranged side by side are provided on the first seat body 221, and a plurality of third negative pressure suction heads 227 are provided on each mounting track 226, and the third negative pressure suction heads 227 are used to connect the negative pressure generating device to adsorb the PCB board on the material carrier 22, and the third negative pressure suction heads 227 are provided with a locking member 228, and the locking member 228 is used to fix the third negative pressure suction heads 227 on the mounting track 226; and the elastic reset member is arranged between the two mounting tracks 226. In this way, the elastic reset member is installed in the space between the two mounting tracks 226, which can improve the space utilization rate on the material carrier 22, and the elastic reset member is arranged in the center, and the force of the elastic reset member on the material carrier 22 is consistent with the moving direction of the material carrier 22, so that the two sides of the material carrier 22 are evenly stressed, and the wear between the first seat body 221 and the sliding track 211 can be reduced.

[0080] In some embodiments, the rotating seat 21 is provided with a clearance hole 212, which is in the shape of a long strip extending along the length direction of the sliding track 211, and the sliding track 211 is located between the clearance hole 212 and the edge of the rotating seat 21, and the loading seat 22 has two connecting parts 224, one of which extends from the clearance hole 212 to the bottom of the rotating seat 21, and the other connecting part 224 extends from the outside of the rotating seat 21 to the bottom of the rotating seat 21, and the abutting part 223 is connected to the two connecting parts 224. Specifically, the first seat body 221 includes a top plate 222 and a slider 225 installed below the top plate 222, the slider 225 is installed on the sliding track 211, and the mounting track 226 is installed above the top plate 222. The two connecting parts 224 are both connected to the top plate 222, so that the top plate 222, the abutting part 223 and the two connecting parts 224 form a frame structure, and the sliding rail 211 and the part of the rotating seat 21 located outside the yielding hole 212 are inserted inside, so that when the pushing part 423 abuts against the abutting part 223, the overall force of the loading seat 22 can be evenly applied, which can avoid the loading seat 22 from generating torque when being pushed, and can reduce the wear between the first seat body 221 and the sliding rail 211.

[0081] In some embodiments, the drive assembly 40 is a linear motor 41. Such a structure is simple and reliable. Of course, in other embodiments, the drive assembly 40 can also be a cylinder, etc.

[0082] The present invention also provides a PCB detection method, which is applied to the above-mentioned PCB detection device. The PCB detection method comprises the following steps:

[0083] The previous detection device 20 detects the front side of the PCB board, receives the PCB board through the loading mechanism of the previous detection device 20, uses the corresponding visual detection mechanism 23 to photograph the front side of the PCB board on the loading mechanism, obtains the front side image information, and feeds the front side image information back to the algorithm system;

[0084] The flip transfer mechanism 5150 flips and moves the PCB board, and the transfer mechanism 51 of the flip transfer mechanism 5150 takes the PCB board that has been inspected by the previous inspection device 20 and places it on the holding structure 524 of the flip mechanism 52. The driving mechanism 521 of the flip mechanism 52 drives the holding structure 524 to flip, so that the PCB board on the holding structure 524 is moved to the top of the loading mechanism of the next inspection device 20 with the back side facing up.

[0085] The rear detection device 20 detects the back side of the PCB board, receives the PCB board put down by the holding structure 524 through the loading mechanism of the rear detection device 20, and uses the corresponding visual detection mechanism 23 to photograph the back side of the PCB board on the loading mechanism to obtain the back side image information, and feeds back the back side image information to the algorithm system.

[0086] In this way, when inspecting the PCB board, the front side of the PCB board to be inspected can be inspected by the previous inspection device 20 first. After the inspection process is completed, the transfer mechanism 51 is used to take the PCB board inspected by the previous inspection device 20, and the PCB board is placed on the holding structure 524 in the receiving position with the front side facing up. Then, the holding structure 524 is driven by the driving mechanism 521 to flip to the placement position with the rotating shaft 522 as the axis, so that the holding structure 524 is located above the loading mechanism, so that the PCB board is placed on the loading mechanism with the front side facing down, so that the back side of the PCB board can be inspected by the subsequent inspection device 20.

[0087] After the transfer mechanism 51 removes the PCB board after the previous detection device 20 has completed the detection, the previous detection device 20 can enter the next detection process, which can avoid the situation where the detection device 20 is idle, and can improve the detection rhythm, thereby improving the detection efficiency. Moreover, after the PCB board is placed on the holding structure 524 of the flipping mechanism 52 through the transfer mechanism 51, the holding structure 524 is driven by the driving mechanism 521 to flip with the rotating shaft 522 as the axis, and the PCB board can be placed on the loading mechanism with the front side facing down. In this way, while moving the PCB board, the PCB board is also turned over, and there is no need to use a robot to move the flipped PCB board on the flipping mechanism 52 to the next detection device 20, which can reduce the transfer time of the PCB board between the two detection devices 20 and improve the detection efficiency.

[0088] In some embodiments, each of the detection devices 20 includes two of the visual detection mechanisms 23;

[0089] In the step of the previous detection device 20 detecting the front side of the PCB board, the following steps are included:

[0090] The PCB board is moved to below the upstream visual inspection mechanism 23 by the loading mechanism of the previous inspection device 20;

[0091] Using the visual inspection mechanism 23 located upstream to photograph the front side of the PCB board on the loading mechanism, obtaining first front side image information, and feeding the first front side image information back to the algorithm system;

[0092] The algorithm system determines whether there is dirt on the front side of the PCB board according to the first front side image information;

[0093] If not, the loading mechanism moves the PCB board inspected by the upstream visual inspection mechanism 23 to below the downstream visual inspection mechanism 23, and uses the downstream visual inspection mechanism 23 to photograph the back side of the PCB board on the loading mechanism to obtain second front side image information, and feeds the second front side image information back to the algorithm system; the algorithm system determines whether there is a quality defect on the front side of the PCB board according to the second front side image information;

[0094] If so, the loading mechanism will move the PCB board inspected by the upstream visual inspection mechanism 23 over the downstream visual inspection mechanism 23 to the transfer mechanism 51 of the flip transfer mechanism 5150 .

[0095] In this way, when dirt is detected on the front side of the PCB board, the subsequent quality inspection will not be performed. When the loading mechanism moves the PCB board, the PCB board only passes through the downstream visual inspection mechanism 23 without quality inspection.

[0096] In some embodiments, the step of the latter detection device 20 detecting the back side of the PCB board includes the following steps:

[0097] The PCB board is moved to below the upstream visual inspection mechanism 23 by the loading mechanism of the latter inspection device 20;

[0098] Using the visual inspection mechanism 23 located upstream to photograph the back side of the PCB board on the loading mechanism, obtaining first back side image information, and feeding the first back side image information back to the algorithm system;

[0099] The algorithm system determines whether there is dirt on the back of the PCB board according to the first back image information;

[0100] If not, the loading mechanism moves the PCB board inspected by the upstream visual inspection mechanism 23 to below the downstream visual inspection mechanism 23, and uses the downstream visual inspection mechanism 23 to photograph the back side of the PCB board on the loading mechanism to obtain second back side image information, and feeds the second back side image information back to the algorithm system; the algorithm system determines whether there is a quality defect on the back side of the PCB board according to the second back side image information;

[0101] If so, the loading mechanism moves the PCB board inspected by the upstream visual inspection mechanism 23 over the downstream visual inspection mechanism 23 to the unloading position.

[0102] In this way, when dirt is detected on the back of the PCB board, the next quality inspection is no longer performed. When the loading mechanism moves the PCB board, the PCB board only passes through the downstream visual inspection mechanism 23 without quality inspection. In addition, when the previous inspection device 20 detects dirt or quality defects on the front of the PCB board, the next inspection device 20 no longer inspects the back of the PCB board to reduce the inspection workload. Or when the previous inspection device 20 detects dirt or quality defects on the front of the PCB board, the next inspection device 20 still inspects the back of the PCB board.

[0103] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A PCB detection device, characterized in that: include: frame; Two detection devices, the two detection devices are installed on the frame at intervals, each of the detection devices comprises a loading mechanism and a visual detection mechanism arranged above the loading mechanism, the loading mechanism is used for placing PCB boards, and the visual detection mechanism is used for photographing the PCB boards on the loading mechanism; A flip transfer mechanism, comprising a transfer mechanism and a flip mechanism, wherein the transfer mechanism and the flip mechanism are both arranged between the two detection devices, the flip mechanism comprises a drive mechanism, a rotating shaft, a connecting rod and a holding structure, the drive mechanism is mounted on the frame, one end of the rotating shaft is connected to the drive mechanism, and the other end is connected to the connecting rod, the holding structure is mounted on an end of the connecting rod away from the rotating shaft, the rotating shaft extends in a horizontal direction and is perpendicular to the direction from one of the detection devices to the other detection device, and the connecting rod is perpendicular to the rotating shaft; The transfer mechanism is used to take the PCB board that has been inspected by the previous inspection device and place it on the holding structure. The driving mechanism is used to drive the holding structure to flip over to above the loading mechanism of the next inspection device, so as to place the flipped PCB board on the loading mechanism of the next inspection device.

2. The PCB detection device according to claim 1, characterized in that: The transfer mechanism includes a lifting component and a suction component installed on the lifting component, the lifting component is installed on the frame, and the suction component is used to connect a negative pressure generating device to suck the PCB board through the negative pressure generated by the negative pressure generating device.

3. The PCB detection device according to claim 2, characterized in that: The frame is provided with a support frame, and a transverse movement assembly is provided on the support frame. The transverse movement assembly extends in a direction from one of the detection devices to another detection device. The lifting assembly is installed on the transverse movement assembly. The holding structure has a receiving position and a placing position. In the receiving position, the holding structure is spaced apart from the material carrying mechanism of the last detection device in the extending direction of the transverse movement assembly. In the placing position, the holding structure is located above the material carrying mechanism of the last detection device. The suction assembly includes a first mounting plate, a fixing member and a first negative pressure suction head, the first mounting plate is provided with a first mounting hole extending vertically, the fixing member is provided with a second mounting hole extending vertically, the first mounting hole and the second mounting hole are both in the shape of long strips extending in the horizontal direction, and the length direction of the first mounting hole is perpendicular to the length direction of the second mounting hole, the fixing member is installed in the first mounting hole, and the negative pressure suction head is installed in the second mounting hole, so that the position of the first negative pressure suction head is adjustable.

4. The PCB detection device according to claim 1, characterized in that: The holding structure includes a second mounting plate and a second negative pressure suction head mounted on the second mounting plate, wherein the second negative pressure suction head is used to connect to a negative pressure generating device so as to suck the PCB board through the negative pressure generated by the negative pressure generating device; The flipping mechanism further comprises a lifting cylinder, the lifting cylinder is mounted on the connecting rod, and the holding structure is fixed to the piston rod of the lifting cylinder.

5. The PCB detection device according to any one of claims 1 to 4, characterized in that: The material loading mechanism comprises a rotating seat and a plurality of material loading seats, the rotating seat is rotatably mounted on the frame, the plurality of material loading seats are mounted on the rotating seat and are arranged around the rotating axis of the rotating seat, the frame is provided with two detection positions above each of the rotating seats, when the rotating seat rotates, the plurality of material loading seats sequentially pass through the two detection positions, each detection position is provided with a visual inspection mechanism, in the rotation direction of the rotating seat, the visual inspection mechanism located upstream is used to detect the dirt on the PCB board, and the visual inspection mechanism located downstream is used to detect the quality of the PCB board after being inspected by the upstream visual inspection mechanism; There are four material loading seats, and when the rotating seat stops rotating, two of the material loading seats are respectively located below two of the detection positions; the rotating seat is arranged in a square shape, and one material loading seat is correspondingly provided at each side position of the rotating seat.

6. The PCB detection device according to any one of claims 1 to 4, characterized in that: The material loading mechanism comprises a rotating seat and a plurality of material loading seats, the rotating seat is rotatably mounted on the frame, a plurality of sliding tracks are arranged on the rotating seat, and the plurality of sliding tracks are arranged end to end in sequence along the circumference of the rotating seat, and each material loading seat is correspondingly mounted on one of the sliding tracks, and the visual detection mechanism is arranged above the rotating seat and is arranged downward; The PCB inspection device also includes a driving component, which is installed on the frame or the rotating seat. The driving component is connected to the carrier seat to drive the carrier seat to move relative to the visual inspection mechanism so that the visual inspection mechanism scans the PCB board on the carrier seat.

7. The PCB testing device according to claim 6, characterized in that: The driving assembly is installed on the frame and is located below the rotating seat. The driving assembly is provided with a pushing structure. The pushing structure has a movable pushing member. The pushing member is used to abut against the material carrier to push the material carrier to move along the sliding track. The material carrier has an abutment portion located below the rotating seat, the pushing structure also includes a second seat body and an elastic member, the pushing member is hinged to the second seat body and has a pushing portion, the pushing portion gradually extends upwardly in a rotating direction of the rotating seat, the elastic member abuts between the second seat body and the pushing member, so that when the rotating seat rotates until the material carrier is located above the driving assembly, the pushing portion abuts against the rear side of the abutment portion to push the material carrier to move along the sliding track; The PCB detection equipment also includes an elastic reset member, which is connected to the rotating seat and the loading seat. The elastic reset member is elastically deformed when the driving assembly drives the loading seat to move. The elastic reset member is used to drive the loading seat to reset when the driving assembly drives the pushing structure to reset.

8. A PCB detection method, characterized in that: Applied to the PCB detection device as claimed in any one of claims 1 to 7, the PCB detection method comprises the following steps: The previous detection device detects the front side of the PCB board, receives the PCB board through the material loading mechanism of the previous detection device, photographs the front side of the PCB board on the material loading mechanism by using the corresponding visual detection mechanism, obtains the front side image information, and feeds the front side image information back to the algorithm system; The flip transfer mechanism flips and moves the PCB board, and the transfer mechanism of the flip transfer mechanism takes the PCB board that has been inspected by the previous inspection device and places it on the holding structure of the flip mechanism. The driving mechanism of the flip mechanism drives the holding structure to flip, so that the PCB board on the holding structure is moved to the top of the loading mechanism of the next inspection device with the back side facing up; The latter detection device detects the back side of the PCB board, receives the PCB board put down by the holding structure through the loading mechanism of the latter detection device, uses the corresponding visual detection mechanism to photograph the back side of the PCB board on the loading mechanism, obtains the back side image information, and feeds back the back side image information to the algorithm system.

9. The PCB detection method according to claim 8, characterized in that: Each of the detection devices comprises two of the visual detection mechanisms; In the step of the previous detection device detecting the front side of the PCB board, the following steps are included: The PCB board is moved to below the upstream visual inspection mechanism through the loading mechanism of the previous inspection device; Using a visual inspection mechanism located upstream to photograph the front side of the PCB board on the loading mechanism, obtaining first front side image information, and feeding the first front side image information back to the algorithm system; The algorithm system determines whether there is dirt on the front side of the PCB board according to the first front side image information; If not, the loading mechanism moves the PCB board inspected by the upstream visual inspection mechanism to below the downstream visual inspection mechanism, uses the downstream visual inspection mechanism to photograph the back side of the PCB board on the loading mechanism, obtains the second front side image information, and feeds the second front side image information back to the algorithm system; If so, the loading mechanism moves the PCB board inspected by the upstream visual inspection mechanism over the downstream visual inspection mechanism to the transfer mechanism of the flip transfer mechanism.

10. The PCB detection method according to claim 9, characterized in that: In the step of the latter detection device detecting the back side of the PCB board, the following steps are included: The PCB is moved to the bottom of the upstream visual inspection mechanism by the loading mechanism of the latter inspection device; Using a visual inspection mechanism located upstream to photograph the back side of the PCB board on the loading mechanism, obtaining first back side image information, and feeding the first back side image information back to the algorithm system; The algorithm system determines whether there is dirt on the back of the PCB board according to the first back image information; If not, the loading mechanism moves the PCB board inspected by the upstream visual inspection mechanism to below the downstream visual inspection mechanism, uses the downstream visual inspection mechanism to photograph the back side of the PCB board on the loading mechanism, obtains the second back side image information, and feeds the second back side image information back to the algorithm system; If so, the loading mechanism moves the PCB board inspected by the upstream visual inspection mechanism over the downstream visual inspection mechanism to the unloading position.

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