Automatic detection machine for PCB (Printed Circuit Board)

Abstract

The invention discloses an automatic detection machine for a PCB (Printed Circuit Board). Comprising a detection table, a square tray slidably arranged on the tabletop of the detection table, a first driving device for driving the square tray to slide, two strip plates placed in the square tray, a plurality of slots parallelly formed in the tops of the strip plates at intervals, a detection box fixed to the tabletop of the detection table, and a first lifting frame arranged on the detection box in a lifting mode. The first sliding block is arranged on the first lifting frame in a sliding mode, the second driving device drives the first sliding block to slide relative to the first lifting frame, the second lifting frame is fixedly connected with the first sliding block, the pair of second sliding blocks is arranged on the second lifting frame in a sliding mode, and the third driving device drives the two second sliding blocks to slide close to each other or away from each other. The clamping plates are fixedly connected with the two second sliding blocks respectively and can clamp the vertical PCB, and the scanning device is arranged in the detection box and scans and detects the PCB. The PCB detection device has the advantage that the effect of automatically and efficiently detecting the PCB is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of PCB board testing equipment, in particular to an automatic PCB board testing machine. Background Art

[0002] PCB (Printed Circuit Board), also known as printed circuit board in Chinese, is an important electronic component and a carrier for the electrical connection of electronic components. At present, the quality of the welding of electronic components on the surface of PCB boards usually needs to be inspected manually with the help of magnifying tools. However, after looking at dense objects for a long time, it is easy to produce visual fatigue, which is not only easy to be dazzled and lead to misjudgment, but also takes a long time to inspect each PCB board and has low inspection efficiency, which is not conducive to mass production of PCB boards. Summary of the invention

[0003] The purpose of the present invention is to provide a PCB board automatic detection machine, which has the effect of automatically and efficiently detecting PCB boards.

[0004] The above technical objectives of the present invention are achieved through the following technical solutions: a PCB board automatic inspection machine, comprising an inspection table, a square tray slidably arranged on the inspection table top, a driving device for driving the square tray to slide relative to the inspection table top, two long strips arranged side by side and placed in the square tray, a plurality of slots arranged at intervals in parallel on the top of the long strips for vertical insertion of PCB boards, an inspection box fixed on the inspection table top, a lifting frame 1 lifted and lowered on the inspection box, a lifting cylinder for driving the lifting frame 1 to move up and down, a slider 1 slidably arranged on the lifting frame 1, and a driving slider 1 A driving device 2 for sliding the lifting frame 1, a lifting frame 2 fixedly connected to the slider 1, a pair of sliders 2 slidably arranged on the lifting frame 2, a driving device 3 for driving the two sliders 2 to slide closer to or away from each other, a pair of clamps respectively fixedly connected to the two sliders 2 and capable of clamping an upright PCB board, a scanning device arranged inside the detection box and scanning and detecting the PCB board, an inlet and an outlet for a square tray to slide through are respectively opened on the left and right sides of the detection box, the lifting frame 1, the lifting frame 2 and the slot are parallel from top to bottom, the two clamps are vertically located above the slot, and slide along a slot together.

[0005] The present invention is further configured as follows: the middle part of the detection box is horizontally arranged on the partition, the inlet and outlet on both sides of the detection box are located at the lower part of the partition, the scanning device is located at the upper part of the partition, and a long hole is opened in the middle of the partition for lifting frame 1, lifting frame 2 and clamping plate to pass through up and down, the top of the detection box is open and detachably connected with a cover plate, the lifting cylinder is fixed to the top of the cover plate, and the piston rod of the lifting cylinder movably passes through the cover plate to connect to the lifting frame 1 inside the detection box.

[0006] The present invention is further configured as follows: the scanning device includes a scanning light source and a scanning camera, a vertical support plate is fixedly arranged on the top of the partition, the scanning light source and the scanning camera are fixedly installed on one side of the support plate, the scanning light source is located parallel to one side of the lifting frame one, and the light direction is obliquely toward the long strip hole in the middle of the partition, the scanning camera is located in the middle below the scanning light source, and the shooting direction is facing one side of the lifting frame two.

[0007] The present invention is further configured as follows: a pair of mutually parallel dovetail guide rails are arranged on the desktop of the detection table, a pair of sliders three are fixedly arranged on the bottom of the square tray, and the bottoms of the two sliders three are respectively provided with dovetail grooves that slide on the two dovetail guide rails, and the top of the lifting frame one is fixedly arranged on two vertical guide rods, and the two guide rods movably pass through the cover plate.

[0008] The present invention is further configured as follows: the driving device includes a screw rod rotatably arranged on the table top of the detection table and located parallel to two dovetail guide rails, a slider 4 fixed to the bottom of the square tray, a nut fixed to the middle of the slider 4 and threadedly connected to the screw rod 1, and a servo motor driving the screw rod 1 to rotate; the table top of the detection table is located between the two dovetail guide rails and is provided with a groove 1 for sliding of the slider 4, and the screw rod 1 is located inside the groove 1; the servo motor 1 is fixedly installed on one end of the table top of the detection table, and one end of the screw rod 1 rotates to pass through the groove 1 and is fixedly connected to the output end of the servo motor 1.

[0009] The present invention is further configured as follows: the second driving device includes a second screw rod rotatably arranged on the first lifting frame, a second nut fixed to the middle of the first slider and threadedly connected to the second screw rod, and a second servo motor driving the second screw rod to rotate; a second groove for sliding the first slider is provided at the bottom of the first lifting frame, and the second screw rod is located inside the second groove; the second servo motor is fixed to the end of the first lifting frame, and one end of the second screw rod rotates to pass through the second groove and is fixedly connected to the output end of the second servo motor.

[0010] The present invention is further configured as follows: the driving device three includes a rotating rod rotatably arranged on the lifting frame two, two sections of threads opened on the rotating rod and with opposite rotation directions, a pair of nuts three respectively fixed to the middle parts of the two sliding blocks two and respectively threadedly connected to the two sections of threads, a bevel gear one fixed on the rotating rod and located in the middle of the two sections of threads, a servo motor three fixed on the lifting frame two, and a bevel gear two fixedly connected to the output end of the servo motor three and meshing with the bevel gear one, a groove three for sliding the sliding block two is opened at the bottom of the lifting frame two, and the rotating rod is located inside the groove three, the bevel gear one and the bevel gear two are meshed in the groove three, the servo motor three is fixed to the top of the lifting frame two, and the output end of the servo motor three rotates and penetrates into the groove three to connect with the bevel gear two, an n-shaped plate covering the servo motor three is fixedly arranged on the top of the lifting frame two, and the top of the n-shaped plate is fixedly connected to the lower end of the sliding block one.

[0011] The present invention is further configured as follows: a PCB board positioning device is also provided inside the detection box, and the PCB board positioning device includes a pair of rotating shafts which respectively rotate through the front and rear side walls of the detection box and are parallel to the square positioning rods, a rotating assembly which drives the two rotating shafts to rotate synchronously in the same direction, a pair of flip arms whose one ends are respectively fixedly connected to the two rotating shafts and rotate to penetrate one end of the detection box, and square positioning rods whose two ends are respectively fixedly connected to the other ends of the two flip arms and are parallel to the rotating shafts, the square positioning rods are located parallel to the slots, and a contact sensor for controlling the servo motor to stop running is provided on one side of the square positioning rod, when the square positioning rod flips to the lowest point, a side of the square positioning rod provided with the contact sensor can contact the PCB board to be detected, and the PCB board to be detected which contacts the square positioning rod is just located between the two clamps, and when the square positioning rod flips to the highest point, it will stay in a safe position above the PCB board and on one side of the clamps and stand by.

[0012] The present invention is further configured as follows: the rotating assembly includes an elongated hole 1 provided on the front and rear side walls of the detection box, a top plate horizontally located above the lifting frame 1 and having two elongated holes 1 respectively at both ends, a pair of slide plates respectively fixed to the two ends of the top plate and sliding on the front and rear side walls of the detection box, a pair of racks respectively fixed to the slide plates, a pair of spur gears respectively fixedly connected to the two rotating shafts and rotatingly passing through one end outside the detection box and respectively meshing with the two racks, and a pair of vertically parallel springs with the upper ends fixedly connected to the bottom of the slide plates;

[0013] The guide rod and the lifting cylinder piston rod slide through the top plate, and the front and rear side walls of the detection box are provided with four grooves for the two slides to slide up and down respectively, and the long hole one is located at the bottom of the groove four, and the middle part of the slide is provided with a long hole two, and the spur gear is located inside the long hole two, and the rack is fixed to the inner side wall of the long hole two, the vertical position of the spring is located in the groove four, and the lower end of the spring is fixedly connected to the bottom end of the groove four, the upper end of the groove four is connected to the top of the detection box, and a pair of plugs that can be vertically inserted into and close the four notches of the two grooves are fixedly provided at the bottom of the cover plate on the top of the detection box.

[0014] The present invention is further configured as follows: U-shaped handles are fixedly provided at both ends of the long strip, and a positioning notch is provided on the top of the square tray for the ends of the U-shaped handle to lie in.

[0015] The beneficial effect of the present invention is that by adopting the above-mentioned square tray and long strip board that can transport multiple PCB boards, the lifting frame 1 and the lifting frame 2 and the clamping plate that can lift and clamp the PCB boards, and the scanning camera and the scanning light source for scanning and detecting the PCB boards, not only the effect of automatic and rapid detection of PCB boards is achieved, but also the defective PCB boards can be picked out and stored separately on the empty long strip board, and then while efficiently detecting PCBs, it can also help the operator to sort and classify good PCB boards and defective PCB boards, thereby fully improving the factory delivery efficiency of PCB boards. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. 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 these drawings without creative work.

[0017] Figure 1 Schematic diagram of the three-dimensional structure of this embodiment;

[0018] Figure 2 This is a cross-sectional view of the structure of this embodiment. Figure 1 ;

[0019] Figure 3 This is a cross-sectional view of the structure of this embodiment. Figure 2 ;

[0020] Figure 4 1 is a schematic diagram of the structure of the driving device 2 and the driving device 3 of the present embodiment;

[0021] Figure 5 Schematic diagram of the structure of the PCB board positioning device of this embodiment;

[0022] Figure 6 This is a schematic diagram of the connection relationship between the square tray and the long strip board in this embodiment;

[0023] In the figure, 1, detection table; 1a, dovetail guide rail; 1b, groove one; 2, square tray; 21, slider three; 22, positioning notch; 3, drive device one; 31, screw rod one; 32, slider four; 33, nut one; 34, servo motor one; 4, long board; 41, slot; 42, U-shaped handle; 5, detection box; 51, partition; 511, long hole; 512, support plate; 52, cover plate; 521, plug plate; 53, groove four; 6, lifting frame one; 61, guide rod; 62, groove two; 7, lifting cylinder; 8, slider one; 9, drive device two; 91, screw rod two; 92, nut two; 93, servo motor two; 10, lifting frame two ; 101 Groove three; 102, N-shaped plate; 11, slider two; 111, clamping plate; 12, driving device three; 121, rotating rod; 122, thread; 123, nut three; 124, bevel gear one; 125, servo motor three; 126, bevel gear two; 13, scanning device; 131, scanning light source; 132, scanning camera; 14, PCB board positioning device; 141, rotating shaft; 142, rotating assembly; 142a, long hole one; 142b, top plate; 142c, slide plate; 142d, long hole two; 142e, rack; 142f, spur gear; 142g, spring; 143, flip arm; 144, square positioning rod. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than 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.

[0025] Embodiment: A PCB board automatic detection machine, such as Figure 1-4As shown, it includes a detection table 1, a square tray 2 slidably set on the desktop of the detection table 1, a driving device 3 for driving the square tray 2 to slide relative to the desktop of the detection table 1, two long strips 4 arranged side by side and placed in the square tray 2, a plurality of parallel slots 41 arranged at intervals on the top of the long strips 4 for vertical insertion of PCB boards, a detection box 5 fixed on the desktop of the detection table 1, a lifting frame 6 set up and lifted on the detection box 5, a lifting cylinder 7 for driving the lifting frame 6 to move up and down, a slider 8 slidably set on the lifting frame 6, a driving device 9 for driving the slider 8 to slide relative to the lifting frame 6, and a fixedly connected slider A lifting frame 10 of a 8, a pair of sliders 11 slidably arranged on the lifting frame 10, a driving device 12 for driving the two sliders 11 to slide closer to or away from each other, a pair of clamps 111 respectively fixedly connected to the two sliders 11 and capable of clamping an upright PCB board, a scanning device 13 arranged inside the detection box 5 and scanning and detecting the PCB board, an inlet and an outlet for the square tray 2 to slide through are respectively opened on the left and right sides of the detection box 5, the lifting frame 16, the lifting frame 10 and the slot 41 are parallel from top to bottom, the two clamps 111 are vertically located above the slot 41, and slide along a slot 41 together.

[0026] like Figure 2 , Figure 3 As shown, the middle of the detection box 5 is horizontally arranged on the partition 51, the inlet and outlet on both sides of the detection box 5 are located at the lower part of the partition 51, the scanning device 13 is located at the upper part of the partition 51, and a long hole 511 is opened in the middle of the partition 51 for the lifting frame 1 6, the lifting frame 2 10 and the clamping plate 111 to pass through up and down. The top of the detection box 5 is open and is detachably connected with a cover plate 52. The lifting cylinder 7 is fixed on the top of the cover plate 52, and the piston rod of the lifting cylinder 7 movably passes through the cover plate 52 to connect the lifting frame 1 6 inside the detection box 5. By adopting the above-mentioned partition 51 and cover plate 52, not only can a good scanning environment with dark light be provided for the scanning device 13, but also the detachable cover plate 52 can also facilitate the staff to disassemble and repair the scanning device 13, the drive device 1 3 and the drive device 3 12 and other structures.

[0027] like Figure 2 , Figure 3As shown, the scanning device 13 includes a scanning light source 131 and a scanning camera 132. A vertical support plate 512 is fixedly provided on the top of the partition 51. The scanning light source 131 and the scanning camera 132 are fixedly installed on one side of the support plate 512. The scanning light source 131 is parallel to one side of the lifting frame 1 6, and the light irradiation direction is obliquely toward the long strip hole 511 in the middle of the partition 51. The scanning camera 132 is located in the middle below the scanning light source 131, and the shooting direction is facing one side of the lifting frame 2 10. By adopting the above scanning device 13, not only can the lifting frame 1 6, the lifting frame 2 10 and the clamping plate 111 and other structures for clamping the PCB board to lift and lower can be used to achieve the effect of automatically and quickly scanning the PCB board, but also the welding quality of the electrical components on the surface of the PCB board can be accurately judged in cooperation with tools such as computers, thereby greatly improving the detection accuracy of the PCB board compared with traditional manual detection.

[0028] like Figure 2 , Figure 3 As shown, a pair of mutually parallel dovetail guide rails 1a are arranged on the top of the inspection table 1, a pair of sliders 3 21 are fixedly arranged at the bottom of the square tray 2, and the bottoms of the two sliders 3 21 are respectively provided with dovetail grooves that slide on the two dovetail guide rails 1a, and the top of the lifting frame 1 6 is fixedly arranged on two vertical guide rods 61, and the two guide rods 61 movably pass through the cover plate 52. By adopting the above-mentioned dovetail guide rails 1a, sliders 3 21 and guide rods 61, not only can the sliding setting of the square tray 2 on the inspection table 1 and the lifting frame 1 6 be lifted and lowered under the cover plate 52 be realized, but also the sliding stability of the square tray 2 and the lifting stability of the lifting frame 1 6 can be fully guaranteed.

[0029] like Figure 2 , Figure 3 As shown, the driving device 3 includes a screw rod 31 rotatably set on the desktop of the detection table 1 and parallelly located between the two dovetail guide rails 1a, a slider 4 32 fixed to the bottom of the square tray 2, a nut 33 fixed to the middle of the slider 4 32 and connected to the screw rod 31 with a thread 122, and a servo motor 34 driving the screw rod 31 to rotate. The desktop of the detection table 1 is located between the two dovetail guide rails 1a and has a groove 1b for the slider 4 32 to slide, and the screw rod 31 is located inside the groove 1b. The servo motor 34 is fixedly installed at one end of the table top of the detection table 1, and one end of the screw rod 31 rotates to pass through the groove 1b and is fixedly connected to the output end of the servo motor 34. By adopting the above-mentioned driving device 3, when it is necessary to drive the square tray 2 to slide relative to the inspection table 1, the servo motor 34 will drive the screw rod 31 to rotate, and then the nut 33 connected to the screw rod 31 with the thread 122 will drive the slider 4 32 to slide along the groove 1b under the rotation of the screw rod 31. Since the slider 4 32 is connected to the bottom of the square tray 2, the square tray 2 will slide relative to the inspection table 1 with the slider 4 32, and drive the long board 4 to pass through the inspection box on the inspection table 1.

[0030] like Figure 4 As shown, the driving device 29 includes a screw rod 291 rotatably arranged on the lifting frame 16, a nut 292 fixed to the middle of the slider 18 and connected to the screw rod 291 by a thread 122, and a servo motor 293 driving the screw rod 291 to rotate. The bottom of the lifting frame 16 is provided with a groove 262 for the slider 18 to slide, and the screw rod 291 is located inside the groove 262. The servo motor 293 is fixed to the end of the lifting frame 16, and one end of the screw rod 291 rotates to pass through the groove 262 and is fixedly connected to the output end of the servo motor 293. By adopting the above-mentioned driving device 29, when it is necessary to drive the slider 18 to slide relative to the lifting frame 16, the servo motor 293 will drive the screw rod 291 to rotate, and then the nut 292 connected to the screw rod 291 by a thread 122 will drive the slider 18 to slide along the groove 262 under the rotation of the screw rod 291, and then drive the lifting frame 10 and the clamping plate 111 connected to the slider 18 in this way, so as to achieve the effect of removing defective PCB boards.

[0031] like Figure 4 As shown, the driving device 3 12 includes a rotating rod 121 rotatably arranged on the lifting frame 2 10, two sections of threads 122 opened on the rotating rod 121 and rotating in opposite directions, a pair of nuts 3 123 respectively fixed to the middle of the two sliders 2 11 and respectively connected by threads 122 to the two sections of threads 122, a bevel gear 1 124 fixed on the rotating rod 121 and located between the two sections of threads 122, a servo motor 3 125 fixed on the lifting frame 2 10, and a bevel gear 2 126 fixedly connected to the output end of the servo motor 3 125 and meshing with the bevel gear 1 124. A groove three 101 is provided at the bottom of the lifting frame two 10 for the sliding block two 11 to slide, and the rotating rod 121 is located inside the groove three 101, the bevel gear one 124 and the bevel gear two 126 are meshed in the groove three 101, the servo motor three 125 is fixed to the top of the lifting frame two 10, and the output end of the servo motor three 125 rotates to penetrate into the groove three 101 to connect with the bevel gear two 126, and an n-shaped plate 102 covering the servo motor three 125 is fixedly provided on the top of the lifting frame two 10, and the top of the n-shaped plate 102 is fixedly connected to the lower end of the sliding block one 8.

[0032] By adopting the above-mentioned driving device three 12, when it is necessary to drive the two sliders two 11 to move away from or close to each other, first the servo motor three 125 drives the bevel gear two 126 to rotate and engage the bevel gear one 124, and then the bevel gear one 124 drives the rotating rod 121 to rotate. Since the nuts three 123 in the two sliders two 11 are respectively connected with the two sections of the threads 122 on the rotating rod 121 with opposite rotation directions, when the rotating rod 121 rotates, the two nuts three 123 will respectively drive the two sliders two 11 to slide along the groove three 101 in opposite directions, and then the effect of clamping and releasing the PCB board by the two clamping plates 111 is achieved in this way. Among them, the n-shaped plate 102 can not only fix the lifting frame two 10 and the slider one 8, but also leave space on the lifting frame two 10 to safely accommodate the servo motor three 125.

[0033] like Figure 2-5 As shown, a PCB board positioning device 14 is also provided inside the detection box 5. The PCB board positioning device 14 includes a pair of rotating shafts 141 that rotate through the front and rear side walls of the detection box 5 and are parallel to the square positioning rod 144, a rotating assembly 142 that drives the two rotating shafts 141 to rotate synchronously in the same direction, a pair of flip arms 143 whose one ends are respectively fixedly connected to the two rotating shafts 141 and rotate to penetrate one end of the detection box 5, and square positioning rods 144 whose two ends are respectively fixedly connected to the other ends of the two flip arms 143 and are parallel to the rotating shaft 141. The square positioning rod 144 is located parallel to the slot 41, and a contact sensor for controlling the servo motor 34 to stop running is provided on one side of the square positioning rod 144. When the square positioning rod 144 flips to the lowest point, the side of the square positioning rod 144 provided with the contact sensor can contact the PCB board to be detected, and the PCB board to be detected that contacts the square positioning rod 144 is just located between the two clamping plates 111. When the square positioning rod 144 flips to the highest point, it will stay in a safe position above the PCB board and on one side of the clamping plate 111 and wait for orders.

[0034] By adopting the above-mentioned PCB board positioning device 14, when the first PCB board moves to the middle and lower part of the clamping plate 111, it will just contact the square positioning rod 144. At the same time, the contact sensor on one side of the square positioning rod 144 will know through contact sensing that the PCB board has reached the specified position, and at the same time turn off the servo motor 134 of the driving device 13 to prevent the square tray 2 from moving further; then, while the lifting frame 16, the lifting frame 2 10 and the clamping plate 111 descend to clamp the PCB board, the rotating component 142 will drive the rotating shaft 141 to rotate The square positioning rod 144 rotates so that the flip arm 143 drives the square positioning rod 144 to flip to the highest position, so as to release the positioning of the PCB board and stay in a safe position that does not affect the lifting of the lifting frame 10 and the clamping of the clamping plate 111. Finally, after the PCB board is tested and the square tray 2 leaves a distance that exceeds the flipping range of the square positioning rod 144 and does not exceed the distance between adjacent PCB boards, the rotating assembly 142 will immediately drive the rotating shaft 141 to rotate in the opposite direction, so that the square positioning rod 144 returns to the lowest position to quickly locate the PCB board behind.

[0035] like Figure 5 As shown, the rotating assembly 142 includes a long hole 511- provided on the front and rear side walls of the detection box 5, a top plate 142b horizontally located above the lifting frame 142b and having two long holes 511- respectively at both ends, a pair of slide plates 142c respectively fixed to the two ends of the top plate 142b and sliding on the front and rear side walls of the detection box 5, a pair of racks 142e respectively fixed to the slide plates 142c, a pair of spur gears 142f respectively fixedly connected to the two rotating shafts 141 and rotatingly passing through one end outside the detection box 5 and respectively meshing with the two racks 142e, and a pair of vertically parallel springs 142g with the upper ends fixedly connected to the bottom of the slide plates 142c;

[0036] The guide rod 61 and the piston rod of the lifting cylinder 7 slide through the top plate 142b, and the front and rear side walls of the detection box 5 are provided with grooves four 53 for the two slides 142c to slide up and down respectively, and the long hole 511 is located at the bottom of the groove four 53, and the middle part of the slide 142c is provided with a long hole 5112, and the spur gear 142f is located inside the long hole 5112, and the rack 142e is fixed to the inner wall of the long hole 5112, the spring 142g is vertically located in the groove four 53, and the lower end of the spring 142g is fixedly connected to the bottom end of the groove four 53, the upper end of the groove four 53 is connected to the top of the detection box 5, and the bottom of the cover plate 52 on the top of the detection box 5 is fixedly provided with a pair of plug-ins 521 that can be vertically inserted into and close the notches of the two grooves four 53 respectively.

[0037] By adopting the above-mentioned rotating assembly 142, when the square positioning rod 144 positions a PCB board and the lifting frame 6 is ready to descend, the spring 142g will pull the top plate 142b down through the slide plate 142c, and at the same time, the rack 142e in the long hole 511 of the slide plate 142c will rotate with the meshing gear under the sliding of the slide plate 142c. Since the gear and the rotating shaft 141 rotate, the rotating shaft 141 will drive the square positioning rod 144 to flip through the flip arm 143 under the rotation of the gear, so that the square positioning rod 144 flips to the highest position and waits; when the PCB board is detected, After the slot 41 is measured, the driving device 3 will drive the square tray 2 to move a short distance, so that the PCB board leaves the positioning position of the square positioning rod 144, and the lifting frame 6 returns to the high place during this time, and after reaching the high place, it will raise the top plate 142b again, and the slide plate 142c will slide upward, and through the meshing transmission of the rack 142e and the gear, the rotating shaft 141 will rotate in the opposite direction, and finally the flip arm 143 connected to the rotating shaft 141 will drive the square positioning rod 144 on standby at the high place to quickly flip back to the lowest position to position the PCB board behind. Among them, the groove 4 53 can not only ensure the sliding stability of the slide plate 142c, but also cooperate with the plug plate 521 to cover and protect the components in the rotating assembly 142.

[0038] like Figure 6 As shown, U-shaped handles 42 are fixedly provided at both ends of the long board 4, and a positioning notch 22 is provided on the top of the square tray 2 for the end of the U-shaped handle 42 to lie in. By adopting the above-mentioned U-shaped handle 42U, it is not only convenient for the staff to take and put the long board 4 from the square tray 2, but also with the positioning notch 22, the long board 4 can be further fixed and positioned to ensure that the long board 4 stably moves with the square tray 2.

[0039] The working principle of this embodiment:

[0040] When testing PCB boards, the first PCB boards produced are vertically inserted into the slots 41 on a long strip board 4 in sequence. When the slots 41 above it are full of PCB boards, the long strip board 4 full of PCB boards and another empty long strip board 4 are placed side by side in the direction tray; then the driving device 13 drives the square tray 2 to slide on the testing table 1, so that the long strip board 4 and the PCB boards are transported into the testing box 5 together. After the first PCB board moves to the lower position between the two clamping plates 111, the lifting cylinder 7 will drive the lifting frame 16 to descend. Since the lifting frame 10 is fixedly connected to the sliding block 18 sliding on the lifting frame 16, the lifting frame 10 will also descend with the lifting frame 16, and the two clamping plates 111 will descend to The first PCB board is clamped on both sides of the first PCB board; then, the driving device 3 12 drives the two sliding blocks 2 11 sliding on the lifting frame 2 10 to approach each other, so that the clamping plates 111 connected to the lower ends of the two sliding blocks 2 11 clamp the two sides of the PCB board; then, the lifting cylinder 7 drives the lifting frame 1 6 and the lifting frame 2 10 to rise, so that the clamping plates 111 and the PCB board clamped by them rise and pass through the long holes 511 of the partition 51; at the same time, the scanning light source 131 and the scanning camera 132 above the partition 51 will take advantage of the rising process of the PCB board to take pictures of the front side of the PCB board soldered with electrical components, and transmit them to the computer for detection and analysis, and when the PCB board passes through the long holes 511 2, the detection result of the PCB board is obtained;

[0041] Afterwards, if the computer detection and analysis result shows that the PCB board is a good product, the lifting cylinder 7 will drive the lifting frame 1 6 and the lifting frame 2 10 to descend and insert the PCB board back into the original slot 41. If the computer detection and analysis result shows that the PCB board is a defective product, the driving device 2 9 will drive the slider 1 8 to slide relative to the lifting frame 1 6, so that the lifting frame 2 10 and the clamping plate 111 move to the top of another empty long strip board 4, and cooperate with the drive of the lifting cylinder 7 to insert the defective PCB board into the slot 41 of the empty long strip board 4, and then pick out the defective PCB board in this way; finally, after the PCB board is detected, the driving device 1 3 will continue to drive the square tray 2 and the long strip board 4 to move, and the other structures repeat the above operations, so that the rear PCB boards can be automatically detected in turn, thereby replacing manual detection while effectively ensuring detection efficiency and detection accuracy.

Claims

1. A PCB board automatic detection machine, characterized in that: The invention comprises a detection table (1), a square tray (2) slidably arranged on the desktop of the detection table (1), a driving device (3) for driving the square tray (2) to slide relative to the desktop of the detection table (1), two long strips (4) arranged side by side and placed in the square tray (2), a plurality of slots (41) arranged at intervals in parallel on the top of the long strips (4) and for vertical insertion of PCB boards, a detection box (5) fixed on the desktop of the detection table (1), a lifting frame (6) lifted and arranged on the detection box (5), a lifting cylinder (7) for driving the lifting frame (6) to move up and down, a slider (8) slidably arranged on the lifting frame (6), a driving device (9) for driving the slider (8) to slide relative to the lifting frame (6), and a slider (10) fixedly connected to the slider (10). The invention relates to a lifting frame (6) having a plurality of lifting frames (10), a pair of sliding blocks (11) slidably arranged on the lifting frame (10), a driving device (12) for driving the two sliding blocks (11) to slide toward or away from each other, a pair of clamping plates (111) respectively fixedly connected to the two sliding blocks (11) and capable of clamping an upright PCB board, and a scanning device (13) arranged inside the detection box (5) and scanning and detecting the PCB board. The left and right sides of the detection box (5) are respectively provided with an inlet and an outlet for the square tray (2) to slide through. The lifting frame (6), the lifting frame (10) and the slot (41) are parallel from top to bottom. The two clamping plates (111) are vertically located above the slot (41) and slide together along the slot (41).

2. The PCB automatic inspection machine according to claim 1, characterized in that: The middle of the detection box (5) is horizontally arranged on the partition (51), the inlet and outlet on both sides of the detection box (5) are located at the lower part of the partition (51), the scanning device (13) is located at the upper part of the partition (51), and the middle of the partition (51) is provided with a long hole (511) for the lifting frame 1 (6), the lifting frame 2 (10) and the clamping plate (111) to pass through up and down, the top of the detection box (5) is open and is detachably connected with a cover plate (52), the lifting cylinder (7) is fixed to the top of the cover plate (52), and the piston rod of the lifting cylinder (7) movably passes through the cover plate (52) to connect to the lifting frame 1 (6) inside the detection box (5).

3. The PCB automatic inspection machine according to claim 2, characterized in that: The scanning device (13) comprises a scanning light source (131) and a scanning camera (132); a vertical supporting plate (512) is fixedly arranged on the top of the partition (51); the scanning light source (131) and the scanning camera (132) are fixedly installed on one side of the supporting plate (512); the scanning light source (131) is located parallel to one side of the lifting frame (6), and the illumination direction is obliquely toward the long strip hole (511) in the middle of the partition (51); the scanning camera (132) is located in the middle below the scanning light source (131), and the shooting direction is facing the side of the lifting frame (10).

4. The PCB automatic inspection machine according to claim 2, characterized in that: A pair of mutually parallel dovetail guide rails (1a) are arranged on the tabletop of the detection table (1); a pair of sliding blocks (21) are fixedly arranged at the bottom of the square tray (2); and the bottoms of the two sliding blocks (21) are respectively provided with dovetail grooves that slide on the two dovetail guide rails (1a); the top of the lifting frame (6) is fixedly arranged on two vertical guide rods (61), and the two guide rods (61) movably pass through the cover plate (52).

5. The PCB automatic inspection machine according to claim 4, characterized in that: The driving device (3) comprises a screw rod (31) rotatably arranged on the tabletop of the detection table (1) and located parallel to the two dovetail guide rails (1a), a slider (32) fixed to the bottom of the square tray (2), a nut (33) fixed to the middle of the slider (32) and connected to the screw rod (31) by a thread (122), and a servo motor (34) driving the screw rod (31) to rotate. The tabletop of the detection table (1) is located between the two dovetail guide rails (1a) and is provided with a groove (1b) for the slider (32) to slide, and the screw rod (31) is located inside the groove (1b). The servo motor (34) is fixedly installed at one end of the tabletop of the detection table (1), and one end of the screw rod (31) rotates to pass through the groove (1b) and is fixedly connected to the output end of the servo motor (34).

6. The PCB automatic inspection machine according to claim 1, characterized in that: The driving device 2 (9) comprises a screw rod 2 (91) rotatably arranged on the lifting frame 1 (6), a nut 2 (92) fixed to the middle of the slider 1 (8) and connected to the screw rod 2 (91) by a thread (122), and a servo motor 2 (93) driving the screw rod 2 (91) to rotate. The bottom of the lifting frame 1 (6) is provided with a groove 2 (62) for the slider 1 (8) to slide, and the screw rod 2 (91) is located inside the groove 2 (62). The servo motor 2 (93) is fixed to the end of the lifting frame 1 (6), and one end of the screw rod 2 (91) rotates to pass through the groove 2 (62) and is fixedly connected to the output end of the servo motor 2 (93).

7. The PCB automatic inspection machine according to claim 1, characterized in that: The driving device 3 (12) comprises a rotating rod (121) rotatably arranged on the lifting frame 2 (10), two sections of threads (122) opened on the rotating rod (121) and rotating in opposite directions, a pair of nuts 3 (123) respectively fixed to the middle of the two sliding blocks 2 (11) and respectively connected to the two sections of threads (122) by threads (122), a bevel gear 1 (124) fixed on the rotating rod (121) and located between the two sections of threads (122), a servo motor 3 (125) fixed on the lifting frame 2 (10), and a bevel gear 2 (126) fixedly connected to the output end of the servo motor 3 (125) and meshing with the bevel gear 1 (124). The lifting frame 2 (10) 0) is provided with a groove three (101) at the bottom for the sliding block two (11) to slide, and the rotating rod (121) is located inside the groove three (101), the bevel gear one (124) and the bevel gear two (126) are located in the groove three (101) and meshed, the servo motor three (125) is fixed to the top of the lifting frame two (10), and the output end of the servo motor three (125) rotates and penetrates into the groove three (101) to connect with the bevel gear two (126), and the top of the lifting frame two (10) is fixedly provided with an n-shaped plate (102) covering the servo motor three (125), and the top of the n-shaped plate (102) is fixedly connected to the lower end of the sliding block one (8).

8. The PCB automatic inspection machine according to claim 5, characterized in that: A PCB board positioning device (14) is also provided inside the detection box (5), and the PCB board positioning device (14) comprises a pair of rotating shafts (141) which respectively rotate and pass through the front and rear side walls of the detection box (5) and are parallel to the square positioning rod (144), a rotating assembly (142) which drives the two rotating shafts (141) to rotate synchronously in the same direction, a pair of flip arms (143) whose one ends are respectively fixedly connected to the two rotating shafts (141) and rotate to penetrate one end of the detection box (5), and a square positioning rod (144) whose two ends are respectively fixedly connected to the other ends of the two flip arms (143) and are parallel to the rotating shaft (141). The square positioning rod (144) is located parallel to the slot (41) and is provided with a contact sensor on one side thereof for controlling the servo motor (34) to stop running. When the square positioning rod (144) is flipped to the lowest point, the side of the square positioning rod (144) provided with the contact sensor can contact the PCB board to be detected. At the same time, the PCB board to be detected that contacts the square positioning rod (144) is located exactly between the two clamping plates (111). When the square positioning rod (144) is flipped to the highest point, it will stay in a safe position above the PCB board and on one side of the clamping plate (111) and wait for orders.

9. The PCB automatic inspection machine according to claim 8, characterized in that: The rotating assembly (142) comprises an elongated hole (511) provided on the front and rear side walls of the detection box (5), a top plate (142b) horizontally located above the lifting frame (6) and having two elongated holes (511) at both ends, a pair of slide plates (142c) respectively fixed to the two ends of the top plate (142b) and sliding on the front and rear side walls of the detection box (5), a pair of racks (142e) respectively fixed to the slide plates (142c), a pair of spur gears (142f) respectively fixedly connected to the two rotating shafts (141) and rotatingly passing through one end outside the detection box (5) and respectively meshing with the two racks (142e), and a pair of vertically parallel springs (142g) with the upper ends fixedly connected to the bottom of the slide plates (142c); The guide rod (61) and the piston rod of the lifting cylinder (7) slide through the top plate (142b), the front and rear side walls of the detection box (5) are provided with grooves (53) for the two slide plates (142c) to slide up and down respectively, and the first long hole (511) is located at the bottom of the groove (53), the middle of the slide plate (142c) is provided with a second long hole (511), and the spur gear (142f) is located inside the second long hole (511), and the rack (142f) is located inside the second long hole (511). 142e) is fixed to the inner side wall of the second long hole (511), the spring (142g) is vertically located in the groove four (53), and the lower end of the spring (142g) is fixedly connected to the bottom end of the groove four (53), the upper end of the groove four (53) is connected to the top of the detection box (5), and a pair of plug-in plates (521) that can be respectively vertically inserted into and close the notches of the two grooves four (53) are fixedly arranged at the bottom of the cover plate (52) on the top of the detection box (5).

10. The PCB automatic inspection machine according to claim 1, characterized in that: U-shaped handles (42) are fixedly provided at both ends of the long strip (4), and a positioning notch (22) is provided on the top of the square tray (2) for the end of the U-shaped handle (42) to lie in.

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