A conveying device for double-sided detection of PCB boards

Abstract

The invention discloses a conveying device for double-sided detection of PCB boards, and relates to the field of PCB board conveying. The device comprises a gantry conveying mechanism, wherein a loading box and a turnover mechanism are arranged within the conveying range of the gantry conveying mechanism, a PCB board detection device is arranged between the loading box and the turnover mechanism, the turnover mechanism comprises a turnover frame and two groups of conveying structures, the turnover frame is arranged between the two groups of conveying structures, the conveying structure comprises two belt conveyors, the two belt conveyors are arranged at intervals along a conveying direction perpendicular to the PCB board, a turnover shaft is rotatably arranged on the turnover frame, two turnover disks are spaced apart along the axial direction of the turnover shaft, the turnover disk is located between the two belt conveyors, two groups of turnover components are symmetrically installed on the side wall of the turnover disk, the arrangement angle of the two groups of turnover components is 180 degrees, and the turnover component comprises an upper support bar and a lower support bar fixedly connected to the turnover disk, so that the double-sided detection of the PCB board is realized, the investment cost of the equipment is reduced, and the automatic production is realized at the same time, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of PCB board conveying, and in particular to a conveying device for double-sided detection of PCB boards. Background Art

[0002] Traditional PCB production and testing factories are transforming into automated production lines. With the development of machine vision, its technology is becoming more mature and the cost is continuously decreasing. At present, many PCB testing workshops in China have begun to introduce visual inspection equipment to replace manual labor, which greatly improves the inspection efficiency. Now the PCB board is transported to the inspection platform for quality inspection through a conveying device. Due to the high quality requirements of PCB boards, both sides of the PCB board need to be inspected during the inspection. Only when both sides of the PCB board are qualified can it enter the next production link. At present, gantry conveyors are mostly used for loading and unloading PCB boards, and then the gantry conveyors cannot turn over the PCB board, resulting in only single-sided inspection. Later, manual turning over is required to be put into the inspection path again for inspection on the other side, which is inefficient and labor-intensive. Some automated production lines will use intelligent manipulators, which control the movements of the intelligent manipulators by setting different programming to complete the turning operation of the PCB board. This requires complex and precise programs, which makes the price too high. Moreover, in factory production, several automated inspection lines will be configured, and each inspection line needs to be configured with an intelligent manipulator, resulting in a very high overall cost, which is not conducive to factory operation. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a conveying device for double-sided inspection of PCB boards to solve the deficiencies of the prior art.

[0004] The objective of the present invention is achieved through the following technical solutions: a conveying device for double-sided detection of PCB boards, comprising a gantry conveying mechanism, a loading box and a flipping mechanism are arranged within the conveying range of the gantry conveying mechanism, a PCB board detection device is arranged between the loading box and the flipping mechanism, the flipping mechanism comprises a flipping frame and two groups of conveying structures, the two groups of conveying structures are arranged at intervals along the conveying direction of the PCB boards, the flipping frame is arranged between the two groups of conveying structures, the conveying structure comprises two belt conveyors, the two belt conveyors are arranged at intervals along the conveying direction perpendicular to the PCB boards, a flipping shaft is rotatably arranged on the flipping frame, two flipping discs are spaced apart on the flipping shaft along the axial direction thereof, the flipping disc is located between the two belt conveyors, a flipping assembly is symmetrically installed on the side wall of the flipping disc, the flipping assembly comprises an upper support bar and a lower support bar, the upper support bar and the lower support bar are both fixedly connected to the flipping disc, and the upper support bar is arranged just above the lower support bar;

[0005] The top and one side of the loading box are open, and a plurality of U-shaped support plates are arranged at equal intervals from top to bottom in the loading box, and the U-shaped openings of the U-shaped support plates are open toward the side of the loading box.

[0006] Furthermore, a negative pressure chamber is provided at one end of the flip shaft, an annular inner cavity is provided in the flip disk, an adsorption chamber is provided at one end of the lower support bar connected to the flip disk, a first negative pressure hole connected to the negative pressure chamber is provided on the side wall of the flip shaft, a second negative pressure hole and a third negative pressure hole are provided on the inner wall and the outer wall of the flip disk respectively, two ends of the second negative pressure hole are respectively connected to the first negative pressure hole and the annular inner cavity, two ends of the third negative pressure hole are respectively connected to the annular inner cavity and the adsorption chamber, a negative pressure adsorption hole connected to the adsorption chamber is provided on the lower support bar, one end of the flip shaft is connected to a negative pressure mechanism, the negative pressure mechanism includes a vacuum pump and a negative pressure tube, one end of the negative pressure tube is connected to the vacuum pump, and the other end is rotatably adapted to the negative pressure chamber, the negative pressure tube is fixed to the flip frame through a U-shaped clamp, and an elastic sealing sleeve is fixedly provided on the negative pressure tube, and the elastic sealing sleeve is adapted to the negative pressure chamber through its own deformation interference fit.

[0007] Furthermore, a photoelectric sensor is arranged between the two flip disks, the photoelectric sensor is mounted on the flip frame, the photoelectric sensor is located below the conveying surface of the belt conveyor, the detection light of the photoelectric sensor is vertically upward, the photoelectric sensor is used to detect whether the PCB board is conveyed between the upper support bar and the lower support bar, the other end of the flip shaft is connected to a driving mechanism, when the photoelectric sensor detects the PCB board, the driving mechanism drives the flip shaft to rotate, and a toggle block is arranged on the belt conveyor in a group of the conveying structures away from the loading box, and the top surface height of the toggle block is higher than the top surface height of the lower support bar in the horizontal state.

[0008] Furthermore, the driving mechanism includes a cylinder, a rack and a gear, the gear is mounted on the flip shaft, the cylinder body of the cylinder is installed on the flip frame, the telescopic shaft of the cylinder is connected to the rack, and the rack meshes with the gear.

[0009] Furthermore, a fine-tuning positioning mechanism is provided at the end of a group of the conveying structures away from the PCB board detection equipment, and the fine-tuning positioning mechanism includes a positioning and loading platform, on which a transverse positioning block and a longitudinal positioning block are fixed, and the upper surface of the positioning and loading platform is smoothed, and a transverse pushing mechanism is provided above the positioning and loading platform, and the transverse pushing mechanism is used to push the PCB board toward the longitudinal positioning block, and a longitudinal pushing mechanism is provided below the positioning and loading platform, and the longitudinal pushing mechanism is used to push the PCB board toward the transverse positioning block.

[0010] Furthermore, the transverse pushing mechanism includes a first horizontal cylinder and a first U-shaped member, the first horizontal cylinder is located above the longitudinal positioning block, the cylinder body of the first horizontal cylinder is installed at the edge position of the positioning and feeding platform, the telescopic shaft of the first horizontal cylinder is connected to the first U-shaped member, the U-shaped opening of the first U-shaped member is set downward, two transverse sliding grooves are opened on the top of the positioning and feeding platform, and the two ends of the bottom opening of the first U-shaped member are respectively located in the two transverse sliding grooves, and the longitudinal pushing mechanism includes a second horizontal cylinder and a second U-shaped member, the telescopic shaft of the second horizontal cylinder is connected to the second U-shaped member, the U-shaped opening of the second U-shaped member is respectively located in the two longitudinal sliding grooves, and when the longitudinal pushing mechanism is actuated, the top surface of the second U-shaped member is located above the positioning and feeding platform.

[0011] Furthermore, the fine-tuning positioning mechanism also includes a base, an adjusting cylinder is vertically installed on the top of the base, the telescopic shaft of the adjusting cylinder is connected to the bottom of the positioning and loading platform, a vertical mounting plate is fixed on the base, and the cylinder body of the second horizontal cylinder is installed on the vertical mounting plate.

[0012] Furthermore, the gantry conveying mechanism includes a gantry frame and two groups of conveying clamping mechanisms, the two groups of conveying clamping mechanisms are staggered along the height direction of the gantry frame, the conveying clamping mechanism includes a conveying beam and a loading mounting plate, the conveying beam is slidably installed on the gantry frame, the moving direction of the conveying beam is parallel to the conveying direction of the belt conveyor, the loading mounting plate is slidably installed on the conveying beam, the moving direction of the loading mounting plate is perpendicular to the moving direction of the conveying beam, a negative pressure suction cup is arranged under the loading mounting plate, a loading cylinder is vertically installed on the top of the loading mounting plate, and the telescopic shaft of the loading cylinder passes through the loading mounting plate to connect the negative pressure suction cup.

[0013] Furthermore, a strip groove is provided through the side wall of the gantry body, a first screw is rotatably arranged in the strip groove, the conveying beam is threadedly mounted on the first screw, and the conveying beam is slidably adapted to the strip groove, a counterweight is connected to the end of the conveying beam away from the loading mounting plate, a first motor is installed at one end of the gantry body, the output shaft of the first motor is connected to the first screw in a transmission manner, a screw slide groove is provided at the bottom of the conveying beam, a second screw is rotatably arranged in the screw slide groove, a screw slider is threadedly mounted on the second screw, the loading mounting plate is installed at the bottom of the screw slider, a second motor is provided at one end of the conveying beam, and the output shaft of the second motor is connected to the second screw in a transmission manner.

[0014] Furthermore, a fixed base is provided below the loading box, a positioning cone is fixed on the top of the fixed base, a positioning hole is provided at the bottom of the loading box, the positioning cone is arranged in the positioning hole, a stacking box is provided within the conveying range of the gantry conveying mechanism, the structure of the stacking box is the same as that of the loading box, the flipping mechanism is located between the loading box and the stacking box, and the side opening of the stacking box faces the flipping mechanism.

[0015] The beneficial effects of the present invention are:

[0016] The PCB board in the loading box is transported to the PCB board detection equipment through the gantry conveying mechanism for one-side detection. After the single-side detection is completed, the gantry conveying mechanism conveys the PCB board to the nearest conveying structure, and the conveying structure conveys the PCB board to between the upper support bar and the lower support bar. The turning plate is driven to rotate 180° by the turning shaft, and the turning plate drives the PCB board thereon to turn 180°, so that the PCB board is turned over and placed on another conveying structure. The gantry conveying mechanism then places the turned PCB board on the PCB board detection equipment for detection of the other side, thereby realizing double-sided detection of the PCB board, reducing the investment cost of the equipment, and realizing automated production and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The structure of a conveying device for double-sided inspection of a PCB board according to the present invention is schematically shown. Figure 1 ;

[0018] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0019] Figure 3 It is a schematic diagram of the cooperation between the turning plate and the turning shaft in a conveying device for double-sided inspection of a PCB board according to the present invention;

[0020] Figure 4 The structure of a conveying device for double-sided inspection of a PCB board according to the present invention is schematically shown. Figure 2 ;

[0021] Figure 5 The structure of a conveying device for double-sided inspection of a PCB board according to the present invention is schematically shown. Figure 3 ;

[0022] Figure 6 It is a front view of a conveying device for double-sided detection of a PCB board according to the present invention;

[0023] Figure 7 The structure of a conveying device for double-sided inspection of a PCB board according to the present invention is schematically shown. Figure 4 ;

[0024] Figure 8for Figure 7 Enlarged view of point B in the middle;

[0025] Fig. 9 It is a structural schematic diagram of a conveying beam in a conveying device for double-sided detection of a PCB board according to the present invention;

[0026] Fig.10 It is a schematic diagram of the internal structure of a loading box in a conveying device for double-sided detection of PCB boards according to the present invention;

[0027] In the figure, 1-feeding box, 2-turning frame, 3-belt conveyor, 4-turning shaft, 5-turning plate, 6-upper support bar, 7-lower support bar, 8-U-shaped support plate, 9-negative pressure chamber, 10-annular inner cavity, 11-adsorption chamber, 12-first negative pressure hole, 13-second negative pressure hole, 14-third negative pressure hole, 15-negative pressure tube, 16-U-shaped clamp, 17-elastic sealing sleeve, 18-photoelectric sensor, 19-sliding block, 20-cylinder, 21-rack, 22-gear, 23-positioning feeding platform, 24-lateral positioning block, 25-longitudinal positioning block, 26-first horizontal cylinder, 27- The first U-shaped part, 28-transverse slide, 29-second horizontal cylinder, 30-second U-shaped part, 31-longitudinal slide, 32-base, 33-adjusting cylinder, 34-vertical mounting plate, 35-gantry frame, 36-conveying beam, 37-feeding mounting plate, 38-negative pressure suction cup, 39-feeding cylinder, 40-strip notch, 41-first lead screw, 42-counterweight, 43-first motor, 44-screw slide, 45-second lead screw, 46-screw slider, 47-second motor, 48-fixed base, 49-positioning cone, 50-positioning hole, 51-stack box, 52-negative pressure adsorption hole. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0029] Embodiment 1: Figures 1 to 10As shown, a conveying device for double-sided detection of PCB boards comprises a gantry conveying mechanism, a loading box 1 and a flipping mechanism are arranged within the conveying range of the gantry conveying mechanism, a PCB board detection device is arranged between the loading box 1 and the flipping mechanism, the flipping mechanism comprises a flipping frame 2 and two groups of conveying structures, the two groups of conveying structures are arranged at intervals along the conveying direction of the PCB board, the flipping frame 2 is arranged between the two groups of conveying structures, the conveying structure close to the PCB board detection device is the front conveying structure, and the other conveying structure is the rear conveying structure, the conveying structure comprises two belt conveyors 3, the two belt conveyors 3 are arranged at intervals along the conveying direction perpendicular to the PCB board, a flipping shaft 4 is rotatably arranged on the flipping frame 2, and the flipping shaft 4 Two turning discs 5 are set at intervals along the upper edge of the upper edge, and the turning discs 5 are located between the two belt conveyors 3. The side walls of the turning discs 5 are symmetrically installed with turning components, which include upper support bars 6 and lower support bars 7. The upper support bars 6 and the lower support bars 7 are fixedly connected to the turning discs 5, and the upper support bars 6 are arranged directly above the lower support bars 7; the top and one side of the loading box 1 are open, and a number of U-shaped support plates 8 are arranged at equal intervals from top to bottom in the loading box 1, and the U-shaped openings of the U-shaped support plates 8 are opened toward the side edges of the loading box 1, and a PCB board is placed on each U-shaped support plate 8, so that the PCB boards are spaced apart and placed in the loading box 1, so that the PCB boards will not be stacked together and will not be crushed. The PCB board is moved out from the side opening of the loading box 1 for loading. The PCB board detection equipment adopts the existing visual inspection equipment. The detection and conveying process of the PCB board is as follows: the PCB board in the loading box 1 is conveyed to the PCB board detection equipment through the gantry conveying mechanism for one-side detection. After the single-side detection is completed, the gantry conveying mechanism places the PCB board on the belt conveyor 3 of the front conveying structure, so that the two ends of the PCB board are respectively placed on the two belt conveyors 3, and the PCB board is conveyed to the flip mechanism through the front conveying structure. At this time, the flip assembly on the flip disk 5 is in a horizontal state, so that the PCB board can be smoothly conveyed to between the upper support bar 6 and the lower support bar 7, and the PC is supported by the lower support bar 7. B board, then, the flip mechanism is activated, and the flip disk 5 is driven to rotate 180° through the flip shaft 4, the flip disk 5 drives the flip assembly to rotate 180°, and the flip assembly drives the PCB board thereon to flip 180°, and the PCB board flipped 180° is close to the rear conveying structure, and the PCB board is conveyed forward by the belt conveyor 3 in the rear conveying structure, so that the turned-over PCB board is separated from the flip assembly, and then the flip shaft 4 drives the flip assembly to reset, and then the gantry conveying mechanism places the turned-over PCB board on the PCB board detection equipment for detection of the other side, thereby realizing double-sided detection of the PCB board, reducing the investment cost of the equipment, and at the same time realizing automated production and improving production efficiency.

[0030] Furthermore, if Figure 1 and Fig.10As shown, a fixed base 48 is provided at the bottom of the loading box 1, and a positioning cone 49 is fixed on the top of the fixed base 48. A positioning hole 50 is opened at the bottom of the loading box 1, and the positioning cone 49 is arranged in the positioning hole 50. A stacking box 51 is provided in the conveying range of the gantry conveying mechanism. The structure of the stacking box 51 is the same as that of the loading box 1. The turning mechanism is located between the loading box 1 and the stacking box 51, and the side opening of the stacking box 51 faces the turning mechanism. The installation position of the loading box 1 on the fixed base 48 can be positioned by the cooperation of the positioning cone 49 and the positioning hole 50, so that the loading is more accurate. The PCB boards that have been inspected on both sides are transported to the stacking box 51 through the gantry conveying mechanism, and the PCB boards are also stacked in the stacking box 51 at intervals to avoid accumulation and crushing. After the PCB boards in the loading box 1 are loaded, the workers replace the fully loaded loading box 1 to continue the inspection. Similarly, after the stacking box 51 is full, the workers replace the empty stacking box 51 to place the PCB boards.

[0031] Embodiment 2: Figures 1 to 3As shown, in order to ensure that the PCB board can be smoothly transported between the upper support bar 6 and the lower support bar 7, the spacing between the upper support bar 6 and the lower support bar 7 is greater than the thickness of the PCB board. After the PCB board is supported by the lower support bar 7, there is a certain gap between the PCB board and the upper support bar 6, resulting in the PCB board not being limited during the deflection of the flip assembly, and it is easy to deviate or even fall off during the flipping process. For this reason, on the basis of the first embodiment, a negative pressure cavity 9 is opened at one end of the flip shaft 4, an annular inner cavity 10 is provided in the flip disk 5, and the lower support bar 7 is connected to the flip plate 5. An adsorption chamber 11 is provided at one end of the disk 5, a first negative pressure hole 12 connected to the negative pressure chamber 9 is provided on the side wall of the flip shaft 4, a second negative pressure hole 13 and a third negative pressure hole 14 are provided on the inner wall and the outer wall of the flip disk 5, respectively, the two ends of the second negative pressure hole 13 are respectively connected to the first negative pressure hole 12 and the annular inner cavity 10, the two ends of the third negative pressure hole 14 are respectively connected to the annular inner cavity 10 and the adsorption chamber 11, a negative pressure adsorption hole 52 connected to the adsorption chamber 11 is provided on the lower support bar 7, one end of the flip shaft 4 is connected to a negative pressure mechanism, the negative pressure mechanism includes a vacuum pump and a negative pressure pipe 15, the negative pressure pipe 15 One end is connected to the vacuum pump, and the other end is rotatably adapted to the negative pressure chamber 9. The negative pressure tube 15 is fixed on the flip frame 2 through the U-shaped clamp 16. An elastic sealing sleeve 17 is fixed on the negative pressure tube 15. The elastic sealing sleeve 17 is adapted to the negative pressure chamber 9 through its own deformation interference fit. When the PCB board is transported to between the upper support bar 6 and the lower support bar 7, the vacuum pump is started, and negative pressure is generated in the negative pressure chamber 9 through the negative pressure tube 15. The negative pressure chamber 9 generates negative pressure in the annular cavity 10 through the first negative pressure hole 12 and the second negative pressure hole 13. The annular cavity 10 generates negative pressure in the adsorption cavity through the third negative pressure hole 14. 11 generates negative pressure, and the adsorption chamber 11 generates negative pressure through the negative pressure adsorption hole 52 to act on the PCB board, so that the PCB board is adsorbed and limited on the lower support bar 7, ensuring that the PCB board will not deviate or fall off when the PCB board is turned over, making the turning action of the PCB board more stable; the setting of the elastic sealing sleeve 17, on the one hand, eliminates the gap between the negative pressure tube 15 and the turning shaft 4, so that the negative pressure effect is not affected, and on the other hand, the turning shaft 4 can rotate normally to turn the PCB board over, and the turning shaft 4 only needs to overcome the friction force generated by the elastic sealing sleeve 17.

[0032] Embodiment 3: Based on Embodiment 2, Figures 1 to 6As shown, a photoelectric sensor 18 is arranged between the two flip disks 5, and the photoelectric sensor 18 is installed on the flip frame 2. The photoelectric sensor 18 is located below the conveying surface of the belt conveyor 3. The detection light of the photoelectric sensor 18 is vertically upward. The photoelectric sensor 18 is used to detect whether the PCB board is conveyed to between the upper support bar 6 and the lower support bar 7. The other end of the flip shaft 4 is connected to a driving mechanism. When the photoelectric sensor 18 detects the PCB board, the driving mechanism drives the flip shaft 4 to rotate. A toggle block 19 is arranged on the belt conveyor 3 in a group of conveying structures away from the loading box 1. The top surface height of the toggle block 19 is higher than the top surface height of the lower support bar 7 in the horizontal state. The photoelectric sensor 18 is used to judge whether the PCB board is delivered to the position. When the PCB board is delivered, the toggle block 19 is moved to the bottom of the belt conveyor 3. When it reaches between the upper support bar 6 and the lower support bar 7, the position of the PCB board is detected by the photoelectric sensor 18. At this time, the driving mechanism is started, and the driving mechanism drives the flip shaft 4 to rotate to turn over the PCB board. After the flip shaft 4 rotates 180°, the driving mechanism stops. After the PCB board is turned over successfully, at this time, the negative pressure pump stops, and then the belt conveyor 3 in the rear conveying structure drives the toggle block 19 to move. Since the top surface height of the toggle block 19 is higher than the top surface height of the lower support bar 7 in the horizontal state, the toggle block 19 pushes the PCB board to move, so as to push the PCB board from the lower support bar 7 to the rear conveying structure, so that the PCB board is separated from the conveying assembly, which is convenient for the gantry conveying mechanism to convey the turned PCB board to the PCB board detection equipment for detection on the other side.

[0033] Embodiment 4: The conventional drive shaft is basically rotated by a motor. However, the present invention requires the drive mechanism to be frequently stopped and started. Frequent starting and stopping of the motor is prone to damage. Therefore, based on the embodiment 3, Figures 1 to 4 As shown, the driving mechanism includes a cylinder 20, a rack 21 and a gear 22, the gear 22 is mounted on the flip shaft 4, the cylinder body of the cylinder 20 is installed on the flip frame 2, the telescopic shaft of the cylinder 20 is connected to the rack 21, the rack 21 meshes with the gear 22, the extension and contraction of the cylinder 20 drives the rack 21 to move, the rack 21 drives the gear 22 to rotate, the gear 22 drives the flip shaft 4 to rotate, the flip shaft 4 drives the flip assembly to rotate 180°, after the PCB board is turned over, the flip shaft 4 deflects 180° in the opposite direction to drive the flip assembly to reset, relative to the motor, the cylinder 20 can be frequently extended and retracted, and the deflection angle of the flip shaft 4 can be stably and accurately controlled through the extension and contraction amount of the cylinder 20, so that the PCB board can be turned over smoothly.

[0034] Embodiment 5: During the conveying process of the PCB board on the conveying structure, a certain offset will occur, and the offset situation is complex and uncontrollable, and the accurate position of the PCB board cannot be determined, resulting in that after the gantry conveying mechanism conveys the PCB board to the PCB board detection device, the PCB board cannot accurately fall into the detection position, affecting the accuracy of the PCB board detection result. Therefore, based on the embodiment 4, as Figures 1 to 6As shown, a fine-tuning positioning mechanism is provided at the end of a group of conveying structures away from the PCB board detection equipment, and the fine-tuning positioning mechanism includes a positioning and loading platform 23, on which a horizontal positioning block 24 and a vertical positioning block 25 are fixed, and the upper surface of the positioning and loading platform 23 is smoothed to reduce the movement friction between the PCB board and the positioning and loading platform 23, so that the PCB board will not be worn during movement, and a horizontal pushing mechanism is provided above the positioning and loading platform 23, and the horizontal pushing mechanism is used to push the PCB board toward the vertical positioning block 25, and a vertical pushing mechanism is provided below the positioning and loading platform 23, and the vertical pushing mechanism is used to push the PCB board toward the horizontal positioning block 24, and the fine-tuning positioning mechanism also includes a base 32, and an adjusting cylinder 33 is vertically installed on the top of the base 32, and the telescopic shaft of the adjusting cylinder 33 is connected to the bottom of the positioning and loading platform 23, and a vertical mounting plate 34 is fixed on the base 32, and a second horizontal The cylinder body of the air cylinder 29 is installed on the vertical mounting plate 34, and the turned-over PCB board is transported to the positioning and loading platform 23 through the rear conveying structure. Then, the horizontal pushing mechanism and the vertical pushing mechanism are started, and the horizontal pushing mechanism pushes the PCB board to the vertical positioning block 25, so that the PCB board contacts the vertical positioning block to complete the vertical position positioning, and the vertical pushing mechanism pushes the PCB board to the horizontal positioning block 24, so that the PCB board contacts the horizontal positioning block 24 to complete the horizontal position positioning, thereby completing the position adjustment of the PCB board, so that the PCB board can still be accurately loaded on the inspection station of the PCB board inspection equipment after being turned over; in specific implementation, when the PCB board inspection equipment inspects one side of the PCB board, at the same time, the previous PCB board is turned over and the position is adjusted, and after the inspection of one side of the PCB board is completed, the PCB board is turned over, and the previous PCB board is loaded for the other side inspection, thereby shortening the inspection time and improving the inspection efficiency.

[0035] Embodiment 6: Based on Embodiment 5, Figures 1 to 6As shown, the lateral pushing mechanism includes a first horizontal cylinder 26 and a first U-shaped member 27. The first horizontal cylinder 26 is located above the longitudinal positioning block 25. The cylinder body of the first horizontal cylinder 26 is installed at the edge of the positioning and feeding platform 23. The telescopic shaft of the first horizontal cylinder 26 is connected to the first U-shaped member 27. The U-shaped opening of the first U-shaped member 27 is set downward. Two horizontal slide grooves 28 are opened on the top of the positioning and feeding platform 23. The two ends of the bottom opening of the first U-shaped member 27 are respectively located in the two horizontal slide grooves 28. The longitudinal pushing mechanism includes a second horizontal cylinder 29 and a second U-shaped member 30. The telescopic shaft of the second horizontal cylinder 29 is connected to the first U-shaped member 27. The U-shaped opening of the first U-shaped member 27 is set downward. Two horizontal slide grooves 28 are opened on the top of the positioning and feeding platform 23. The two ends of the bottom opening of the first U-shaped member 27 are respectively located in the two horizontal slide grooves 28. The shaft is connected to the second U-shaped member 30, and the U-shaped opening of the second U-shaped member 30 is set upward. Two longitudinal slide grooves 31 are opened through the positioning and feeding platform 23, and the two ends of the opening of the second U-shaped member 30 are respectively located in the two longitudinal slide grooves 31. When the longitudinal pushing mechanism is actuated, the top surface of the second U-shaped member 30 is located above the positioning and feeding platform 23. The fine-tuning positioning mechanism also includes a base 32, and an adjusting cylinder 33 is vertically installed on the top of the base 32. The telescopic shaft of the adjusting cylinder 33 is connected to the bottom of the positioning and feeding platform 23. A vertical mounting plate 34 is fixed on the base 32, and the cylinder body of the second horizontal cylinder 29 is installed on the vertical mounting plate 34, during the process of the PCB board entering the positioning and loading platform 23, the adjusting cylinder 33 drives the positioning and loading platform 23 to move upward, so that the top surface of the positioning and loading platform 23 is flush with the conveying plane of the belt conveyor 3. At this time, the top surface of the second U-shaped member 30 is lower than the top surface of the positioning and loading platform 23, so that the PCB board will not interfere with the second U-shaped member 30, so that the PCB board can be smoothly moved to the positioning and loading platform 23, and then the adjusting cylinder 33 drives the positioning and loading platform 23 to move downward, so that the top surface of the second U-shaped member 30 is higher than the top surface of the positioning and loading platform 23. At this time, the horizontal pushing mechanism and the vertical pushing mechanism start The first horizontal cylinder 26 drives the first U-shaped member 27 to move close to the longitudinal positioning block 25, so that the PCB board contacts the longitudinal positioning block 25 to complete the longitudinal positioning. The second horizontal cylinder 29 drives the second U-shaped member 30 to move close to the transverse positioning block 24, so that the PCB board contacts the transverse positioning block 24 to complete the transverse positioning, so that the loading position of the PCB board after turning over is determined, thereby controlling the movement of the gantry conveying mechanism to realize the accurate loading of the PCB board; wherein, the transverse pushing mechanism and the longitudinal pushing mechanism are respectively arranged above and below the positioning and loading platform 23, so that the transverse pushing mechanism and the longitudinal pushing mechanism will not affect each other.

[0036] Embodiment 7: Based on Embodiment 6, Figures 1 to 9As shown, the gantry conveying mechanism includes a gantry frame 35 and two groups of conveying clamping mechanisms, the two groups of conveying clamping mechanisms are staggered along the height direction of the gantry frame 35, the conveying clamping mechanism includes a conveying beam 36 and a loading mounting plate 37, the conveying beam 36 is slidably mounted on the gantry frame 35, the moving direction of the conveying beam 36 is parallel to the conveying direction of the belt conveyor 3, the loading mounting plate 37 is slidably mounted on the conveying beam 36, the moving direction of the loading mounting plate 37 is perpendicular to the moving direction of the conveying beam 36, a negative pressure suction cup 38 is arranged below the loading mounting plate 37, a loading cylinder 39 is vertically installed on the top of the loading mounting plate 37, the telescopic shaft of the loading cylinder 39 passes through the loading mounting plate 37 to connect the negative pressure suction cup 38, and a negative pressure suction cup 38 is arranged on the gantry frame 35. Two groups of conveying and clamping mechanisms are provided, one of which is used for testing the PCB boards in the loading box 1, and the other is used for testing the PCB boards on the positioning loading platform 23. During the testing of the PCB boards in the loading box 1, the other conveying and clamping mechanism clamps the turned-over PCB board and places it on one side of the PCB board testing device, so that it is in a state to be loaded. After the testing is completed, the idle conveying and clamping mechanism conveys the tested PCB board to the stacking box 51. At the same time, the PCB boards to be loaded are tested on the PCB board testing device, so that multiple actions are performed simultaneously, thereby improving production efficiency. The two groups of conveying and clamping mechanisms are staggered up and down, and no interference occurs.A strip-shaped slot 40 is provided through the side wall of the gantry body 35, and a first lead screw 41 is rotatably provided in the strip-shaped slot 40. The conveying beam 36 is threadedly mounted on the first lead screw 41, and the conveying beam 36 is slidably adapted to the strip-shaped slot 40. A counterweight 42 is connected to the end of the conveying beam 36 away from the loading mounting plate 37. A first motor 43 is installed at one end of the gantry body 35, and the output shaft of the first motor 43 is connected to the first lead screw 41 in a transmission manner. A lead screw slide groove 44 is provided at the bottom of the conveying beam 36, and a second lead screw 45 is rotatably provided in the lead screw slide groove 44. A lead screw slider 46 is threadedly mounted on the second lead screw 45. The loading mounting plate 37 is installed at the bottom of the lead screw slider 46. A second motor 47 is provided at one end of the conveying beam 36, and the output shaft of the second motor 47 is connected to the second lead screw 45 in a transmission manner. When loading, the first motor 43 drives the first lead screw 41 to rotate, so that the conveying beam 36 moves along the first The axial direction of the lead screw 41 moves linearly to realize the X-axial movement of the negative pressure suction cup 38, and the second motor 47 drives the second lead screw 45 to rotate, so that the feeding mounting plate 37 moves linearly along the axial direction of the second lead screw 45 to realize the Y-axial movement of the negative pressure suction cup 38, and the feeding cylinder 39 drives the negative pressure suction cup 38 to move up and down to realize the Z-axial movement of the negative pressure suction cup 38, so that the negative pressure suction cup 38 has the movement freedom in the three directions of X, Y, and Z in the spatial coordinate system, which can meet the feeding requirements. During feeding, the negative pressure suction cup 38 extends into the feeding box 1 from the top opening of the feeding box 1, and the negative pressure suction cup 38 is connected to the vacuum pump through the negative pressure hose, and the PCB board is adsorbed by negative pressure. Due to the U-shaped structure of the U-shaped support plate 8, the negative pressure suction cup 38 can smoothly pass through the U-shaped support plate 8 to adsorb the PCB board below, and then move the PCB board out through the side opening of the feeding box 1 to complete the feeding operation.

Claims

1. A conveying device for double-sided inspection of PCB boards, comprising a gantry conveying mechanism, characterized in that: A loading box (1) and a turning mechanism are provided within the conveying range of the gantry conveying mechanism. A PCB board detection device is provided between the loading box (1) and the turning mechanism. The turning mechanism comprises a turning frame (2) and two groups of conveying structures. The two groups of conveying structures are arranged at intervals along the conveying direction of the PCB boards. The turning frame (2) is provided between the two groups of conveying structures. The conveying structure comprises two belt conveyors (3). The two belt conveyors (3) are arranged at intervals along the conveying direction perpendicular to the PCB boards. A turning shaft (4) is rotatably provided on the turning frame (2). Two turning discs (5) are spaced apart on the turning shaft (4) along its own axial direction. The turning disc (5) is located between the two belt conveyors (3). A turning assembly is symmetrically installed on the side wall of the turning disc (5). The turning assembly comprises an upper support bar (6) and a lower support bar (7). The upper support bar (6) and the lower support bar (7) are both fixedly connected to the turning disc (5). The upper support bar (6) is provided directly above the lower support bar (7). The top and one side of the loading box (1) are open, and a plurality of U-shaped support plates (8) are arranged at equal intervals from top to bottom in the loading box (1), and the U-shaped openings of the U-shaped support plates (8) are open toward the side of the loading box (1); A fine-tuning positioning mechanism is provided at the end of a group of the conveying structures away from the PCB board detection device, the fine-tuning positioning mechanism comprising a positioning and loading platform (23), a transverse positioning block (24) and a longitudinal positioning block (25) being fixed on the positioning and loading platform (23), the upper surface of the positioning and loading platform (23) being smoothed, a transverse pushing mechanism is provided above the positioning and loading platform (23), the transverse pushing mechanism is used to push the PCB board toward the longitudinal positioning block (25), and a longitudinal pushing mechanism is provided below the positioning and loading platform (23), the longitudinal pushing mechanism is used to push the PCB board toward the transverse positioning block (24); The lateral pushing mechanism comprises a first horizontal cylinder (26) and a first U-shaped member (27), wherein the first horizontal cylinder (26) is located above the longitudinal positioning block (25), the cylinder body of the first horizontal cylinder (26) is installed at the edge of the positioning and feeding platform (23), the telescopic shaft of the first horizontal cylinder (26) is connected to the first U-shaped member (27), the U-shaped opening of the first U-shaped member (27) is arranged downward, two horizontal sliding grooves (28) are opened on the top of the positioning and feeding platform (23), and the two ends of the bottom opening of the first U-shaped member (27) are respectively located at the two horizontal sliding grooves. In the transverse slide groove (28), the longitudinal pushing mechanism includes a second horizontal cylinder (29) and a second U-shaped member (30), the telescopic shaft of the second horizontal cylinder (29) is connected to the second U-shaped member (30), the U-shaped opening of the second U-shaped member (30) is arranged upward, two longitudinal slide grooves (31) are opened through the positioning and loading platform (23), and the two ends of the opening of the second U-shaped member (30) are respectively located in the two longitudinal slide grooves (31), and when the longitudinal pushing mechanism is in operation, the top surface of the second U-shaped member (30) is located above the positioning and loading platform (23).

2. A conveying device for double-sided inspection of PCB boards according to claim 1, characterized in that: A negative pressure cavity (9) is provided at one end of the flip shaft (4), an annular inner cavity (10) is provided in the flip disk (5), an adsorption cavity (11) is provided at one end of the lower support bar (7) connected to the flip disk (5), a first negative pressure hole (12) connected to the negative pressure cavity (9) is provided on the side wall of the flip shaft (4), a second negative pressure hole (13) and a third negative pressure hole (14) are provided on the inner wall and the outer wall of the flip disk (5), respectively, the two ends of the second negative pressure hole (13) are connected to the first negative pressure hole (12) and the annular inner cavity (10), respectively, and the two ends of the third negative pressure hole (14) are connected to the annular inner cavity (10) and the adsorption chamber (11), the lower support bar (7) is provided with a negative pressure adsorption hole (52) connected to the adsorption chamber (11), one end of the flip shaft (4) is connected to a negative pressure mechanism, the negative pressure mechanism comprises a vacuum pump and a negative pressure tube (15), one end of the negative pressure tube (15) is connected to the vacuum pump, and the other end is rotatably adapted in the negative pressure chamber (9), the negative pressure tube (15) is fixed to the flip frame (2) through a U-shaped clamp (16), and an elastic sealing sleeve (17) is fixed on the negative pressure tube (15), and the elastic sealing sleeve (17) is adapted in the negative pressure chamber (9) through its own deformation interference fit.

3. A conveying device for double-sided inspection of PCB boards according to claim 2, characterized in that: A photoelectric sensor (18) is provided between the two flip plates (5). The photoelectric sensor (18) is mounted on the flip frame (2). The photoelectric sensor (18) is located below the conveying surface of the belt conveyor (3). The detection light of the photoelectric sensor (18) is directed vertically upward. The photoelectric sensor (18) is used to detect whether the PCB board is conveyed between the upper support bar (6) and the lower support bar (7). The other end of the flip shaft (4) is connected to a driving mechanism. When the photoelectric sensor (18) detects the PCB board, the driving mechanism drives the flip shaft (4) to rotate. A toggle block (19) is provided on the belt conveyor (3) in a group of the conveying structures away from the loading box (1). The top surface height of the toggle block (19) is higher than the top surface height of the lower support bar (7) in a horizontal state.

4. A conveying device for double-sided inspection of PCB boards according to claim 3, characterized in that: The driving mechanism comprises a cylinder (20), a rack (21) and a gear (22); the gear (22) is sleeved on the flip shaft (4); the cylinder body of the cylinder (20) is mounted on the flip frame (2); the telescopic shaft of the cylinder (20) is connected to the rack (21); and the rack (21) meshes with the gear (22).

5. The conveying device for double-sided inspection of PCB boards according to claim 1, characterized in that: The fine-tuning positioning mechanism also includes a base (32), an adjusting cylinder (33) is vertically mounted on the top of the base (32), a telescopic shaft of the adjusting cylinder (33) is connected to the bottom of the positioning and feeding platform (23), a vertical mounting plate (34) is fixed on the base (32), and a cylinder body of the second horizontal cylinder (29) is mounted on the vertical mounting plate (34).

6. A conveying device for double-sided inspection of PCB boards according to claim 1, characterized in that: The gantry conveying mechanism comprises a gantry frame (35) and two groups of conveying clamping mechanisms, the two groups of conveying clamping mechanisms are staggered along the height direction of the gantry frame (35), the conveying clamping mechanism comprises a conveying beam (36) and a loading mounting plate (37), the conveying beam (36) is slidably mounted on the gantry frame (35), the moving direction of the conveying beam (36) is parallel to the conveying direction of the belt conveyor (3), the loading mounting plate (37) is slidably mounted on the conveying beam (36), the moving direction of the loading mounting plate (37) is perpendicular to the moving direction of the conveying beam (36), a negative pressure suction cup (38) is arranged below the loading mounting plate (37), a loading cylinder (39) is vertically mounted on the top of the loading mounting plate (37), and a telescopic shaft of the loading cylinder (39) passes through the loading mounting plate (37) and is connected to the negative pressure suction cup (38).

7. A conveying device for double-sided inspection of PCB boards according to claim 6, characterized in that: A strip-shaped slot (40) is formed through the side wall of the gantry body (35), a first lead screw (41) is rotatably arranged in the strip-shaped slot (40), the conveying beam (36) is threadedly mounted on the first lead screw (41), and the conveying beam (36) is slidably adapted to the strip-shaped slot (40), a counterweight (42) is connected to one end of the conveying beam (36) away from the loading mounting plate (37), a first motor (43) is installed at one end of the gantry body (35), and the first motor (43) ) is connected to the first lead screw (41) by transmission, a lead screw slot (44) is provided at the bottom of the conveying beam (36), a second lead screw (45) is rotatably arranged in the lead screw slot (44), a lead screw slider (46) is threadedly sleeved on the second lead screw (45), the loading mounting plate (37) is mounted at the bottom of the lead screw slider (46), a second motor (47) is provided at one end of the conveying beam (36), and the output shaft of the second motor (47) is connected to the second lead screw (45).

8. The conveying device for double-sided inspection of PCB boards according to claim 1, characterized in that: A fixed base (48) is arranged below the loading box (1), a positioning cone (49) is fixed on the top of the fixed base (48), a positioning hole (50) is opened at the bottom of the loading box (1), the positioning cone (49) is arranged in the positioning hole (50), a stacking box (51) is arranged within the conveying range of the gantry conveying mechanism, the structure of the stacking box (51) is the same as that of the loading box (1), the turning mechanism is located between the loading box (1) and the stacking box (51), and the side opening of the stacking box (51) faces the turning mechanism.

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