A double-sided inspection device for circuit boards

Abstract

The present invention belongs to the technical field of circuit board detection equipment, and in particular, relates to a double-sided circuit board detection equipment, including a workbench, the upper surface of the workbench is fixedly connected with a U-shaped top plate, the upper surface of the U-shaped top plate is fixedly embedded with an electric push rod, the moving end of the electric push rod is fixedly sleeved with a rolling bearing, and the outer wall of the outer ring of the rolling bearing is fixedly sleeved with a double-sided steering mechanism. The present invention enables the double-sided circuit board detection equipment to not only have the functions of pre-detection and pad cleaning of new energy vehicle circuit boards, but also has the function of detecting fine cracks in pads of new energy vehicle circuit boards, which can effectively improve the accuracy of circuit board detection results and ensure the reliability of electronic component assembly on new energy vehicle circuit boards, thereby improving the ability of new energy vehicle circuit boards to resist environmental interference and ensuring the safety of driving new energy vehicles.

Description

Technical Field

[0001] The invention belongs to the technical field of circuit board detection equipment, and in particular relates to a circuit board double-sided detection equipment. Background Art

[0002] New energy vehicles refer to vehicles that use new energy as a power source. They are essentially different from traditional fuel vehicles and have advantages such as environmental protection and efficient energy utilization. Today, the intelligence level of new energy vehicles continues to improve, and intelligence is reflected in many aspects such as vehicle automatic driving assistance, intelligent interactive systems, and precise vehicle status monitoring. The development of intelligence is closely related to the progress of circuit boards. As the intelligence level of new energy vehicles becomes higher and higher, the integration of circuit boards is also increasing, and even circuit boards with electronic components assembled on both sides of the composite appear. This highly integrated circuit board can carry more electronic components, thereby meeting the high requirements of new energy vehicle intelligent systems for information processing, signal transmission, etc., providing a hardware foundation for the intelligent development of new energy vehicles. In addition, new energy vehicle circuit boards need to be double-sided tested before assembling electronic components. For example, the patent authorization announcement number is CN105021612B, which discloses a double-sided circuit board detection device.

[0003] At present, when double-sided inspection is carried out on circuit boards used in new energy vehicles, visual inspection cameras are mostly used for inspection. Visual inspection cameras can detect whether there are scratches, stains and cracks on the circuit boards of new energy vehicles. However, visual inspection cameras generally inspect the entire range of the circuit boards of new energy vehicles, and often ignore targeted inspection of the pads on the circuit boards of new energy vehicles, which affects the comprehensiveness and accuracy of the inspection of circuit boards of new energy vehicles. For example, the copper foil at the pads of the circuit boards of new energy vehicles may produce internal stress due to processing technology (such as etching). In the etching process, if the concentration, temperature or etching time of the etching solution is not properly controlled, uneven stress may be generated at the edge of the pad, thereby causing micro cracks in the copper foil at the pad. Such micro cracks will make it difficult for the solder used to weld electronic components to fully fill the cracks at the pads of the circuit boards of new energy vehicles, and cause the strength of the solder joints after welding to decrease. In addition, with the interference of the environment during the driving of new energy vehicles, the stability of the electrical connection on the circuit boards of new energy vehicles and the reliability of welding are affected, making the circuit boards of new energy vehicles prone to failure, which in turn easily affects the safety of driving new energy vehicles.

[0004] Therefore, we propose a circuit board double-sided inspection device to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a circuit board double-sided detection device in view of the above problems.

[0006] To achieve the above object, the present invention adopts the following technical scheme: a double-sided inspection device for a circuit board, comprising a workbench, the upper surface of the workbench is fixedly connected with a U-shaped top plate, the upper surface of the U-shaped top plate is fixedly embedded with an electric push rod, the moving end of the electric push rod is fixedly sleeved with a rolling bearing, and the outer wall of the outer ring of the rolling bearing is fixedly sleeved with a double-sided steering mechanism;

[0007] The back outer wall of the U-shaped top plate is fixedly connected to the back plate, the bottom end of the back plate is fixedly embedded with a CCD detection camera, the upper surface of the U-shaped top plate is fixedly connected to an integrated computer that cooperates with the CCD detection camera, the upper surface of the U-shaped top plate is fixedly connected to a hollow storage box, the top of the hollow storage box is fixedly embedded with a connecting box, the inner wall of the connecting box is fixedly connected to a supporting mesh plate and a supporting plate, the upper surface of the supporting mesh plate is fixedly connected to a PLC controller, the upper surface of the hollow storage box is fixedly connected to an alarm, the upper surface of the support plate is fixedly connected to a one-way air pump, the air outlet end of the one-way air pump passes through the lower surface of the support plate and is fixedly connected to a hard pipe, one side end of the hard pipe is fixedly connected to a first normally closed solenoid valve, the liquid inlet end of the first normally closed solenoid valve is fixedly connected to the side wall of the connecting box, and the other side end of the hard pipe passes through the outer wall of the hollow storage box and is fixedly connected to a detection mechanism.

[0008] In the above-mentioned double-sided detection device for a circuit board, the double-sided steering mechanism includes a U-shaped positioning plate, the top of the U-shaped positioning plate is fixedly sleeved with the outer wall of the outer ring of the rolling bearing, the upper surface of the U-shaped positioning plate is provided with two through holes, and the hole walls of the through holes are movably connected with a T-shaped rod, the bottom ends of the two T-shaped rods are commonly fixedly connected with a first U-shaped clamp, the rod walls of the T-shaped rods are movably sleeved with a reset spring, the two ends of the reset spring are respectively fixedly connected with the upper surface of the first U-shaped clamp and the inner wall of the U-shaped positioning plate, the upper surface of the first U-shaped clamp is fixedly connected with a pressure sensor, the bottom end of the workbench is fixedly connected with a drive motor, the output end of the drive motor passes through the upper surface of the workbench, and is fixedly connected with a second U-shaped clamp symmetrically matched with the first U-shaped clamp.

[0009] In the above-mentioned double-sided detection equipment for circuit boards, the detection mechanism includes an elastic coil fixedly connected to the outlet end of the hard tube, the bottom end of the elastic coil is connected to a rotating tube through a sealed bearing, the bottom end of the rotating tube is provided with a cleaning assembly, the outer wall of the rotating tube is sleeved with a connecting plate, the upper surface of the connecting plate is fixedly connected with a hollow shaft servo motor, the inner wall driving end of the hollow shaft servo motor is fixedly connected to the outer wall of the rotating tube, the outer wall of the connecting plate is fixedly connected with an electronic ohmmeter, the side of the connecting plate away from the electronic ohmmeter is fixedly connected with a U-shaped handle, the outer wall of the U-shaped handle is movably sleeved with a limiting ring, the outer wall of the limiting ring is fixedly connected to the outer wall of the U-shaped top plate, and the outer wall of the rotating tube is fixedly sleeved with a pad detection assembly.

[0010] In the above-mentioned double-sided detection device for a circuit board, the pad detection component includes a connecting bearing fixedly sleeved with the outer wall of a rotating rod, the outer wall of the connecting bearing is fixedly connected with a sleeve, the outer wall of the sleeve is fixedly connected with a first hollow tube, the top of the first hollow tube is fixedly connected with a second hollow tube, the side wall of the second hollow tube is fixedly connected with the outer wall of the U-shaped handle, the top air nozzle end of the first hollow tube and the side end of the second hollow tube are commonly fixedly connected with a connecting tube, the inner wall of the second hollow tube is sealed and movably connected with a first sealing plug, the outer wall of the second hollow tube is provided with a through hole, and the hole wall of the through hole is movably connected with an L-shaped rod, and the side end of the L-shaped rod is connected to the first sealing plug. The side end of the plug is fixedly connected, the end of the L-shaped rod away from the first sealing plug is fixedly connected to the third hollow tube, the inner walls of the first hollow tube and the second hollow tube are movably connected to the second sealing plug, the inner walls of the bottom ends of the first hollow tube and the second hollow tube are movably connected to a hollow detection needle tube, the top end of the hollow detection needle tube is fixedly connected to the lower surface of the second sealing plug, the outer wall of the hollow detection needle tube is movably sleeved with an insulating spring, the bottom ends of the two insulating springs are fixedly connected to the outer wall of the hollow detection needle tube, the top ends of the two insulating springs are fixedly connected to the bottom ends of the first hollow tube and the third hollow tube respectively, and the lower surface of the connecting plate is fixedly connected to a drying auxiliary mechanism.

[0011] In the above-mentioned double-sided detection device for a circuit board, the drying auxiliary mechanism includes a drying box fixedly connected to the lower surface of the connecting plate, an electric heating tube is fixedly embedded in the top of the drying box, a conduit is fixedly connected to the top of the drying box, a second normally closed solenoid valve is fixedly connected to the top of the conduit, the top of the second normally closed solenoid valve is fixedly connected to the outer wall of the elastic coil, a hose is fixedly connected to the air nozzle at the bottom of the drying box, the bottom end of the hose is fixedly connected to the outer wall of one of the hollow detection needle tubes, and an air jet hole is opened at the bottom of the hollow detection needle tube.

[0012] In the above-mentioned circuit board double-sided detection device, a threaded hole is opened on the upper surface of the hollow storage box, and a sealing plug is threadedly connected to the hole wall of the threaded hole, and the interior of the hollow storage box is filled with an anhydrous ethanol liquid layer.

[0013] In the above-mentioned circuit board double-sided inspection device, the cleaning component includes a wiping cotton block, the outer wall of the wiping cotton block is fixedly sleeved with a sealing thread ring, and the bottom end of the rotating tube is provided with a connecting thread that matches the sealing thread ring.

[0014] In the above-mentioned circuit board double-sided detection device, the two hollow detection needle tubes are made of copper, and the bending angles of the bottoms of the two hollow detection needle tubes are both 15-25 degrees.

[0015] Compared with the existing technology, the advantages of a circuit board double-sided detection device are:

[0016] Through the set CCD inspection camera, integrated computer, electric push rod and double-sided steering mechanism, when each production batch of new energy vehicle battery panels is double-sided inspected before assembling electronics, firstly, an appropriate amount of new energy vehicle circuit board samples are extracted, and these circuit board samples are inspected one by one through the circuit board double-sided inspection equipment. At this time, the circuit board samples are placed in the double-sided steering mechanism. The double-sided steering mechanism can not only limit and clamp the circuit board samples, but also facilitate the convenient flipping of the circuit board for inspection. After the flipping inspection, the circuit board samples do not need to be repeatedly limited, and the double-sided steering mechanism cooperates with the CCD inspection camera to facilitate the double-sided pre-inspection of the circuit board samples and ensure the efficiency of the new energy vehicle circuit board inspection.

[0017] Through the detection mechanism, cleaning component and drying auxiliary mechanism, when the circuit board sample passes the pre-detection by the CCD detection camera, the staff rotates the wiping cotton block of the cleaning component through the detection mechanism, and the anhydrous ethanol liquid layer in the hollow storage box can moisten the wiping cotton block, thereby facilitating the cleaning of the pads on the new energy vehicle circuit board, avoiding a small amount of stains interfering with the detection of the pads of the new energy vehicle circuit board, and the pads of the new energy vehicle circuit board after cleaning are also dried by the drying auxiliary mechanism. This mechanism enables the double-sided circuit board detection equipment to have the function of fine cleaning of the pads of the new energy vehicle circuit board, thereby improving the accuracy of the detection results of the new energy vehicle circuit board.

[0018] Through the set electronic ohmmeter and pad detection component, when the pad of the circuit board sample is detected by two hollow detection needles, if there is no cracking damage at the pad of the circuit board sample, the electronic ohmmeter detects the pad resistance of the circuit board sample through the two hollow detection needles and it does not exceed the warning resistance value preset in the PLC controller, the PLC controller does not control the alarm to sound an alarm; on the contrary, if there is a slight crack at the pad of the circuit board sample, the PLC controller controls the alarm to sound an alarm, and when the two hollow detection needles are detecting the pad of the circuit board sample, the distance between the two hollow detection needles can be adjusted through the pad detection component, thereby realizing a comprehensive detection of the pad of the circuit board sample, and the workers can also The staff judges the overall qualified rate of the new energy vehicle circuit boards in this production batch by counting the qualified rate of the circuit board samples. If the qualified rate of the circuit board sample detection does not meet the standard, it indicates that the defective rate of the new energy vehicle circuit boards in this production batch is high due to the influence of the production process, which in turn leads to safety hazards in the new energy vehicle circuit boards in this production batch and cannot be assembled with electronic components. This mechanism enables the double-sided inspection equipment of the circuit board to have the function of detecting subtle cracks in the pads of the new energy vehicle circuit board, which can effectively improve the accuracy of the circuit board inspection results and ensure the reliability of the assembly of electronic components on the new energy vehicle circuit board, thereby improving the ability of the new energy vehicle circuit board to resist environmental interference and ensuring the safety of new energy vehicle driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of a circuit board double-sided detection device provided by the present invention;

[0020] Figure 2 It is a schematic structural diagram of a circuit board double-sided detection device provided by the present invention;

[0021] Figure 3 It is a structural schematic diagram of a double-sided steering mechanism in a double-sided circuit board detection device provided by the present invention;

[0022] Figure 4 It is a schematic cross-sectional view of a hollow storage box in a circuit board double-sided detection device provided by the present invention;

[0023] Figure 5 It is a structural schematic diagram of a detection mechanism in a circuit board double-sided detection device provided by the present invention;

[0024] Figure 6 It is a structural schematic diagram of a cleaning component in a circuit board double-sided detection device provided by the present invention;

[0025] Figure 7 It is a structural schematic diagram of a pad detection component in a circuit board double-sided detection device provided by the present invention;

[0026] Figure 8It is a structural schematic diagram of the working state of a pad detection component in a circuit board double-sided detection device provided by the present invention when detecting a pad;

[0027] Fig. 9 It is a structural schematic diagram of a hollow detection needle tube part in a circuit board double-sided detection device provided by the present invention.

[0028] In the figure: 1 workbench, 2 U-shaped top plate, 3 electric push rod, 4 rolling bearing, 5 double-sided steering mechanism, 51 U-shaped positioning plate, 52 T-shaped rod, 53 first U-shaped clamp, 54 return spring, 55 pressure sensor, 56 drive motor, 57 second U-shaped clamp, 6 detection mechanism, 61 elastic coil, 62 rotating tube, 63 connecting plate, 64 hollow shaft servo motor, 65 electronic ohmmeter, 66 U-shaped handle, 67 limit ring, 7 cleaning component, 71 wiping cotton block, 72 sealing thread ring, 8 pad detection component, 81 connecting bearing, 82 outer jacket, 83 first hollow tube, 84 second hollow tube, 85 Connecting pipe, 86 first sealing plug, 87 L-shaped rod, 88 third hollow tube, 89 second sealing plug, 810 hollow detection needle tube, 811 insulating spring, 9 drying auxiliary mechanism, 91 drying box, 92 electric heating tube, 93 catheter, 94 second normally closed solenoid valve, 95 hose, 96 air jet hole, 10 back side plate, 11 CCD detection camera, 12 integrated computer, 13 hollow storage box, 14 connecting box, 15 supporting mesh plate, 16 supporting plate, 17 PLC controller, 18 alarm, 19 one-way air pump, 20 hard tube, 21 first normally closed solenoid valve, 22 sealing plug, 23 anhydrous ethanol liquid layer. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] like Figure 1-Figure 9As shown, a double-sided inspection device for a circuit board comprises a workbench 1, the upper surface of the workbench 1 is fixedly connected with a U-shaped top plate 2, the upper surface of the U-shaped top plate 2 is fixedly embedded with an electric push rod 3, the movable end of the electric push rod 3 is fixedly sleeved with a rolling bearing 4, the outer wall of the outer ring of the rolling bearing 4 is fixedly sleeved with a double-sided steering mechanism 5, the double-sided steering mechanism 5 comprises a U-shaped positioning plate 51, the top end of the U-shaped positioning plate 51 is fixedly sleeved with the outer wall of the outer ring of the rolling bearing 4, the upper surface of the U-shaped positioning plate 51 is provided with two through holes, and the hole wall of the through hole is movably connected with a T-shaped rod 52, and the bottom ends of the two T-shaped rods 52 are fixedly connected with a first U-shaped clamp The T-shaped rod 53 and the rod wall of the T-shaped rod 52 are movably sleeved with a reset spring 54, and the two ends of the reset spring 54 are respectively fixedly connected to the upper surface of the first U-shaped clamping strip 53 and the inner wall of the U-shaped positioning plate 51, and the upper surface of the first U-shaped clamping strip 53 is fixedly connected to a pressure sensor 55, and the bottom end of the workbench 1 is fixedly connected to a drive motor 56, and the output end of the drive motor 56 passes through the upper surface of the workbench 1 and is fixedly connected to a second U-shaped clamping strip 57 that is symmetrically matched with the first U-shaped clamping strip 53. This mechanism enables the circuit board double-sided detection equipment to have the function of pre-detection of new energy vehicle circuit boards, and can ensure the efficiency of new energy vehicle circuit board detection.

[0031] The back outer wall of the U-shaped top plate 2 is fixedly connected with a back plate 10, and a CCD detection camera 11 is fixedly embedded at the bottom end of the back plate 10. The upper surface of the U-shaped top plate 2 is fixedly connected with an integrated computer 12 that matches the CCD detection camera 11. The upper surface of the U-shaped top plate 2 is fixedly connected with a hollow storage box 13. A threaded hole is opened on the upper surface of the hollow storage box 13, and a sealing plug 22 is threadedly connected to the hole wall of the threaded hole. The interior of the hollow storage box 13 is filled with an anhydrous ethanol liquid layer 23. The anhydrous ethanol liquid layer 23 is volatile and can ensure the safe and reliable cleaning of the pads of the new energy vehicle circuit board. A connecting box 14 is fixedly embedded on the top of the hollow storage box 13, a supporting mesh 15 and a supporting plate 16 are fixedly connected to the inner wall of the connecting box 14, a PLC controller 17 is fixedly connected to the upper surface of the supporting mesh 15, an alarm 18 is fixedly connected to the upper surface of the hollow storage box 13, a one-way air pump 19 is fixedly connected to the upper surface of the supporting plate 16, an air outlet end of the one-way air pump 19 passes through the lower surface of the supporting plate 16, and is fixedly connected to a hard pipe 20, one side end of the hard pipe 20 is fixedly connected to a first normally closed solenoid valve 21, and a liquid inlet end of the first normally closed solenoid valve 21 is fixedly connected to the side wall of the connecting box 14.

[0032] The other side end of the hard tube 20 passes through the outer wall of the hollow storage box 13 and is fixedly connected to a detection mechanism 6. The detection mechanism 6 includes an elastic coil 61 fixedly connected to the outlet end of the hard tube 20. The bottom end of the elastic coil 61 is connected to a rotating tube 62 through a sealing bearing. The bottom end of the rotating tube 62 is provided with a cleaning component 7. The cleaning component 7 includes a wiping cotton block 71. A sealing threaded ring 72 is fixedly sleeved on the outer wall of the wiping cotton block 71. A connecting thread that matches the sealing threaded ring 72 is provided at the bottom end of the rotating tube 62. The movable connection of the cleaning component 7 can facilitate the replacement of the wiping cotton block 71 when it is damaged, and the tightening direction of the sealing threaded ring 72 is opposite to the rotation direction of the rotating tube 62, thereby ensuring the stability of the connection of the wiping cotton block 71.

[0033] The outer wall of the rotating tube 62 is sleeved with a connecting plate 63, and a hollow shaft servo motor 64 is fixedly connected to the upper surface of the connecting plate 63. The inner wall driving end of the hollow shaft servo motor 64 is fixedly connected to the outer wall of the rotating tube 62. The outer wall of the connecting plate 63 is fixedly connected to an electronic ohmmeter 65. A U-shaped handle 66 is fixedly connected to the side of the connecting plate 63 away from the electronic ohmmeter 65. The outer wall of the U-shaped handle 66 is movably sleeved with a limiting ring 67. The outer wall of the limiting ring 67 is fixedly connected to the outer wall of the U-shaped top plate 2. The outer wall of the rotating tube 62 is fixedly sleeved with a pad detection assembly 8. The pad detection assembly 8 includes a connecting bearing 81 fixedly sleeved with the outer wall of the rotating rod. The outer wall of the connecting bearing 81 is fixedly sleeved with the outer wall of the rotating rod. The outer wall of the outer wall 82 is fixedly connected with a first hollow tube 83, the top of the first hollow tube 83 is fixedly connected with a second hollow tube 84, the side wall of the second hollow tube 84 is fixedly connected with the outer wall of the U-shaped handle 66, the top gas nozzle end of the first hollow tube 83 and the side end of the second hollow tube 84 are fixedly connected with a connecting tube 85, the inner wall of the second hollow tube 84 is sealed and movably connected with a first sealing plug 86, the outer wall of the second hollow tube 84 is provided with a through hole, and the hole wall of the through hole is movably connected with an L-shaped rod 87, the side end of the L-shaped rod 87 is fixedly connected with the side end of the first sealing plug 86, and the end of the L-shaped rod 87 away from the first sealing plug 86 is fixedly connected There is a third hollow tube 88, the inner walls of the first hollow tube 83 and the second hollow tube 84 are movably connected with a second sealing plug 89, the inner walls of the bottom ends of the first hollow tube 83 and the second hollow tube 84 are movably connected with a hollow detection needle tube 810, the two hollow detection needle tubes 810 are made of copper, the bending angles of the bottoms of the two hollow detection needle tubes 810 are both 22 degrees, the bent hollow detection needle tubes 810 can make it easier for the bottom ends of the two hollow detection needle tubes 810 to be close to each other, and thus facilitate the measurement of the pads of circuit board samples with smaller areas, the copper hollow detection needle tube 810 has a strong conductor capacity, the top of the hollow detection needle tube 810 and the lower surface of the second sealing plug 89 are connected. The outer wall of the hollow detection needle tube 810 is movably connected with an insulating spring 811, and the bottom ends of the two insulating springs 811 are fixedly connected to the outer wall of the hollow detection needle tube 810, and the top ends of the two insulating springs 811 are fixedly connected to the bottom ends of the first hollow tube 83 and the third hollow tube 88 respectively. This mechanism cooperates with the electronic ohmmeter 65 to enable the equipment to have the function of detecting fine cracks in the soldering pads of new energy vehicle circuit boards, which can effectively improve the accuracy of circuit board detection results and ensure the reliability of electronic component assembly on new energy vehicle circuit boards, thereby improving the ability of new energy vehicle circuit boards to resist environmental interference and ensuring the safety of new energy vehicle driving.

[0034] A drying auxiliary mechanism 9 is fixedly connected to the lower surface of the connecting plate 63, and the drying auxiliary mechanism 9 includes a drying box 91 fixedly connected to the lower surface of the connecting plate 63, an electric heating tube 92 is fixedly embedded in the top of the drying box 91, a conduit 93 is fixedly connected to the top of the drying box 91, a second normally closed solenoid valve 94 is fixedly connected to the top of the conduit 93, and the top of the second normally closed solenoid valve 94 is fixedly connected to the outer wall of the elastic coil 61, and a hose 95 is fixedly connected to the air nozzle at the bottom of the drying box 91, and the bottom end of the hose 95 is fixedly connected to the outer wall of one of the hollow detection needle tubes 810, and an air jet hole 96 is opened at the bottom end of the hollow detection needle tube 810. This mechanism can improve the drying speed of the new energy vehicle circuit board pad after cleaning.

[0035] The two hollow detection needle tubes 810 are electrically connected to the detection ends of the electronic ohmmeter 65 through wires, the output ends of the pressure sensor 55, the electronic ohmmeter 65 and the integrated computer 12 are electrically connected to the input end of the PLC controller 17 through wires, the electric push rod 3, the drive motor 56, the hollow shaft servo motor 64, the electric heating tube 92, the second normally closed solenoid valve 94, the alarm 18 and the first normally closed solenoid valve 21 are all electrically connected to the output end of the PLC controller 17 through wires, and at the same time, the output end of the CCD detection camera 11 is electrically connected to the input end signal of the integrated computer 12 through a data line. The model of the electronic ohmmeter 65 is burster2316-V0000 electronic ohmmeter, and the electronic ohmmeter has RS232 and PLC interfaces, so as to facilitate data transmission and communication with the PLC controller 17. The equipment and electrical connection methods used for the above-mentioned electrical connections are all prior art and are well known to those skilled in the art, and will not be repeated here.

[0036] The operating principle of the present invention is now described as follows: when each production batch of new energy vehicle battery panels is double-sidedly inspected before being assembled with electronics, an appropriate amount of new energy vehicle circuit board samples are first extracted, and these circuit board samples are inspected one by one through the circuit board double-sided inspection equipment. Specifically, after the circuit board sample is placed on the second U-shaped clamp bar 57, the electric push rod 3 is controlled by the internal automatic control program of the PLC controller 17 to push the first U-shaped clamp bar 53 in the double-sided steering mechanism 5 downward, and the first U-shaped clamp bar 53 and the second U-shaped clamp bar 57 cooperate with each other to achieve the purpose of clamping and limiting the circuit board sample, and during the clamping process of the circuit board sample, the electric push rod 3 The push will cause the U-shaped positioning plate 51 and the T-shaped rod 52 to move relative to each other, and the return spring 54 is compressed and stored. At this time, the pressure sensor 55 feels the squeezing force of the U-shaped positioning plate 51, and the pressure sensor 55 transmits a pressure electrical signal to the PLC controller 17. When the U-shaped positioning plate 51 contacts the first U-shaped clamping strip 53, the pressure on the pressure sensor 55 reaches the pressure threshold preset by the PLC controller 17. At this time, the PLC controller 17 controls the electric push rod 3 to stop the moving end from moving downward, and delays the start of the drive motor 56 by 30 seconds. After the 30-second countdown is over, the PLC controller 17 controls the output end of the drive motor 56 to drive the second The U-shaped clamp bar 57 rotates 180 degrees. After the second U-shaped clamp bar 57 rotates 180 degrees, the drive motor 56 is powered off for 30 seconds. After the countdown of the 30 seconds is completed, the PLC controller 17 controls the drive motor 56 to rotate 180 degrees in the opposite direction, thereby returning the circuit board sample to its initial state. The double-sided steering mechanism 5 enables the circuit board sample to be turned over for inspection without repeated limit, saving time and effort. During the two 30-second countdowns, the CCD inspection camera 11 will capture images of both sides of the circuit board for visual inspection. The images captured by the CCD inspection camera 11 are transmitted to the integrated computer 12, and the CCD inspection camera 11 is used to detect the circuit board sample. The captured image is compared with the preset standard image in the integrated computer 12. If the comparison finds that there are unqualified phenomena such as cracks, stains and oxidation on the circuit board, the integrated computer 12 sends an unqualified alarm signal to the PLC controller 17. The PLC controller 17 controls the alarm 18 to alarm according to the unqualified alarm signal. On the contrary, if the comparison finds that there is no unqualified situation on both sides of the circuit board, the alarm 18 will not alarm, and the circuit board will be accurately detected by the detection mechanism 6 for the pads of the circuit board sample. This mechanism enables the circuit board double-sided detection equipment to have the function of pre-detection of new energy vehicle circuit boards, which can ensure the efficiency of new energy vehicle circuit board detection;

[0037] After the circuit board sample passes the pre-inspection by the CCD inspection camera 11, the staff controls the inspection mechanism 6 through the U-shaped handle 66 to clean the pad of the circuit board sample to prevent a small amount of stains from interfering with the accuracy of the inspection result. Specifically, the PLC controller 17 controls the first normally closed solenoid valve 21 to be energized and opened, and at the same time starts the one-way air pump 19 and the hollow shaft servo motor 64. The hollow shaft servo motor 64 drives the rotating tube 62 to rotate, and the rotating tube 62 drives the wiping cotton block 71 of the cleaning component 7 to rotate, and a small amount of anhydrous ethanol liquid in the hollow storage box 13 flows into the hard tube 20 through the opened first normally closed solenoid valve 21, and then is atomized in the hard tube 20 by the air blown by the one-way air pump 19, and the atomized anhydrous ethanol is blown away by the air. The wiping cotton block 71 is wetted by air, and the excess mist-like anhydrous ethanol is sprayed onto the pad of the circuit board sample through the pores of the wiping cotton block 71. Then the staff rotates the wet wiping cotton block 71 close to the pad of the circuit board sample to be tested through the U-shaped handle 66, and cleans the slight stains on the surface of the pad to prevent the slight stains from affecting the resistance detection of the hollow detection needle tube 810. At this time, since the wiping cotton block 71 needs to be close to the pad of the circuit board sample, the hollow detection needle tube 810 is squeezed by the circuit board sample and retracted into the first hollow tube 83 and the third hollow tube 88. The air in the first hollow tube 83 enters the second hollow tube 84 through the connecting tube 85, and then the air in the second hollow tube 84 passes through the first sealing The plug 86 pushes the L-shaped rod 87, and the L-shaped rod 87 pushes the third hollow tube 88 away from the first hollow tube 83, thereby preventing the two hollow detection needle tubes 810 from being too close to interfere with the cleaning of the pads by the wiping cotton block 71. After the pads on the surface of one side of the circuit board sample are cleaned, the PLC controller 17 controls the first normally closed solenoid valve 21 to be powered off and closed, and controls the second normally closed solenoid valve 94 and the electric heating tube 92 to be powered on and started. At this time, the air output by the one-way air pump 19 is transported to the hollow detection needle tube 810 through the elastic coil 61, the opened second normally closed solenoid valve 94, the conduit 93, the drying box 91 and the hose 95. The air is also heated by the electric heating tube 92 when passing through the drying box 91, and finally the hot air passes through the jet hole 9 6 sprays onto the pads of the cleaned circuit board sample to quickly dry the pads to prevent the humid environment from interfering with the detection of the pads by the hollow detection needle 810. After the pads on one side of the circuit board sample are cleaned and dried, the circuit board sample is rotated 180 degrees to repeat the above steps to clean and dry the pads on the other side. The circuit board sample with the pads cleaned is then tested by the pad detection component 8. The mist-like anhydrous ethanol generated during the cleaning process of the new energy vehicle circuit board pads will be inhaled and discharged through the indoor exhaust system and will not spread indoors to cause safety hazards. This mechanism enables the circuit board double-sided detection equipment to have the function of fine cleaning of the new energy vehicle circuit board pads, thereby improving the accuracy of the new energy vehicle circuit board detection results.

[0038] When the soldering pad of the circuit board sample is detected by two hollow detection needle tubes 810, if there is no crack damage at the soldering pad of the circuit board sample, the electronic ohmmeter 65 detects the soldering pad resistance of the circuit board sample through the two hollow detection needle tubes 810 and it does not exceed the preset warning resistance value in the PLC controller 17, and the PLC controller 17 does not control the alarm 18 to sound an alarm. Specifically, the two hollow detection needle tubes 810 are connected to the electronic ohmmeter 65 through wires, and the electronic ohmmeter 65 can measure the soldering pad resistance between the bottom ends of the two hollow detection needle tubes 810, and the electronic ohmmeter 65 can convert the measured resistance into an electrical signal and feed it back to the PLC controller 17. On the contrary, if there is a slight crack at the soldering pad of the circuit board sample, the resistance detected by the electronic ohmmeter 65 through the two hollow detection needle tubes 810 will exceed the preset warning resistance in the PLC controller 17, and then the PLC controller 17 controls the alarm 18 to sound an alarm according to the electrical signal transmitted by the electronic ohmmeter 65.

[0039] When the two hollow detection needle tubes 810 detect the soldering pads of the circuit board sample, one hollow detection needle tube 810 is always stable at one side edge of the soldering pad, and by pressing the stably arranged hollow detection needle tube 810, the top of the hollow detection needle tube 810 will be retracted into the first hollow tube 83, and push the second sealing plug 89 in the first hollow tube 83 to move. The movement of the second sealing plug 89 allows the air in the first hollow tube 83 to enter the second hollow tube 84 through the connecting tube 85, and pushes the L-shaped rod 87 outward through the first sealing plug 86, and the outward movement distance of the L-shaped rod 87 is proportional to the length of the hollow detection needle tube 810 retracted into the first hollow tube 83. At the same time, the outward-moving L-shaped rod 87 drives the detection end position adjustment of the other hollow detection needle tube 810 through the third hollow tube 88, thereby realizing the adjustment of the distance between the two measuring ends of the two hollow detection needle tubes 810. After the disk inspection is completed, the circuit board sample is rotated to inspect the pad on the other side, thereby achieving a comprehensive inspection of the pad of the circuit board sample, and the staff determines the overall qualification rate of the new energy vehicle circuit boards in this production batch by counting the qualification rate of the circuit board samples. If the qualification rate of the circuit board sample inspection does not meet the standard, it indicates that the new energy vehicle circuit boards in this production batch have a high defective rate due to the influence of the production process, which in turn causes the new energy vehicle circuit boards in this production batch to be unable to assemble electronic components due to safety hazards, and can avoid causing greater economic damage. This mechanism enables the double-sided inspection equipment of the circuit board to have the function of detecting subtle cracks in the pads of the new energy vehicle circuit board, which can effectively improve the accuracy of the circuit board inspection results, and ensure the reliability of the assembly of electronic components on the new energy vehicle circuit board, thereby improving the ability of the new energy vehicle circuit board to resist environmental interference, and can ensure the safety of new energy vehicle driving.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-sided circuit board inspection device, comprising a workbench (1), characterized in that: The upper surface of the workbench (1) is fixedly connected to a U-shaped top plate (2), an electric push rod (3) is fixedly embedded in the upper surface of the U-shaped top plate (2), a rolling bearing (4) is fixedly sleeved on the movable end of the electric push rod (3), and a double-sided steering mechanism (5) is fixedly sleeved on the outer wall of the outer ring of the rolling bearing (4); The back outer wall of the U-shaped top plate (2) is fixedly connected to a back plate (10), a CCD detection camera (11) is fixedly embedded in the bottom end of the back plate (10), an integrated computer (12) that matches the CCD detection camera (11) is fixedly connected to the upper surface of the U-shaped top plate (2), a hollow storage box (13) is fixedly connected to the upper surface of the U-shaped top plate (2), a connection box (14) is fixedly embedded in the top end of the hollow storage box (13), a support mesh plate (15) and a support plate (16) are fixedly connected to the inner wall of the connection box (14), and a P An LC controller (17), an alarm (18) is fixedly connected to the upper surface of the hollow storage box (13), a one-way air pump (19) is fixedly connected to the upper surface of the support plate (16), an air outlet end of the one-way air pump (19) passes through the lower surface of the support plate (16) and is fixedly connected to a hard pipe (20), one side end of the hard pipe (20) is fixedly connected to a first normally closed solenoid valve (21), a liquid inlet end of the first normally closed solenoid valve (21) is fixedly connected to a side wall of the connection box (14), and the other side end of the hard pipe (20) passes through the outer wall of the hollow storage box (13) and is fixedly connected to a detection mechanism (6); The double-sided steering mechanism (5) comprises a U-shaped positioning plate (51), the top end of the U-shaped positioning plate (51) is fixedly sleeved with the outer wall of the outer ring of the rolling bearing (4), the upper surface of the U-shaped positioning plate (51) is provided with two through holes, and the hole walls of the through holes are movably connected with a T-shaped rod (52), the bottom ends of the two T-shaped rods (52) are commonly fixedly connected with a first U-shaped clamping strip (53), the rod walls of the T-shaped rods (52) are movably sleeved with a return spring (54), the two ends of the return spring (54) are respectively fixedly connected with the upper surface of the first U-shaped clamping strip (53) and the inner wall of the U-shaped positioning plate (51), the upper surface of the first U-shaped clamping strip (53) is fixedly connected with a pressure sensor (55), the bottom end of the workbench (1) is fixedly connected with a drive motor (56), the output end of the drive motor (56) passes through the upper surface of the workbench (1) and is fixedly connected with a second U-shaped clamping strip (57) symmetrically matched with the first U-shaped clamping strip (53); The detection mechanism (6) comprises an elastic coil (61) fixedly connected to the outlet end of the hard tube (20); the bottom end of the elastic coil (61) is connected to a rotating tube (62) via a sealing bearing; the bottom end of the rotating tube (62) is provided with a cleaning assembly (7); the outer wall of the rotating tube (62) is sleeved with a connecting plate (63); the upper surface of the connecting plate (63) is fixedly connected to a hollow shaft servo motor (64); the inner wall driving end of the hollow shaft servo motor (64) is fixedly connected to the outer wall of the rotating tube (62); the outer wall of the connecting plate (63) is fixedly connected to an electronic ohmmeter (65); a U-shaped handle (66) is fixedly connected to the side of the connecting plate (63) away from the electronic ohmmeter (65); the outer wall of the U-shaped handle (66) is movably sleeved with a limiting ring (67); the outer wall of the limiting ring (67) is fixedly connected to the outer wall of the U-shaped top plate (2); and the outer wall of the rotating tube (62) is fixedly sleeved with a pad detection assembly (8); The pad detection assembly (8) comprises a connecting bearing (81) fixedly sleeved with the outer wall of the rotating rod, the outer wall of the connecting bearing (81) is fixedly connected to a sleeve (82), the outer wall of the sleeve (82) is fixedly connected to a first hollow tube (83), the top end of the first hollow tube (83) is fixedly connected to a second hollow tube (84), the side wall of the second hollow tube (84) is fixedly connected to the outer wall of the U-shaped handle (66), the top air nozzle end of the first hollow tube (83) and the side end of the second hollow tube (84) are fixedly connected to a connecting tube (85), the inner wall of the second hollow tube (84) is sealed and movably connected to a first sealing plug (86), the outer wall of the second hollow tube (84) is provided with a through hole, and the hole wall of the through hole is movably connected to an L-shaped rod (87), the side end of the L-shaped rod (87) is fixedly connected to the side end of the first sealing plug (86), and the L-shaped rod (87) A third hollow tube (88) is fixedly connected to one end away from the first sealing plug (86); the inner walls of the first hollow tube (83) and the second hollow tube (84) are movably connected to the second sealing plug (89); the inner walls of the bottom ends of the first hollow tube (83) and the second hollow tube (84) are movably connected to a hollow detection needle tube (810); the top end of the hollow detection needle tube (810) is fixedly connected to the lower surface of the second sealing plug (89); the outer wall of the hollow detection needle tube (810) is movably sleeved with an insulating spring (811); the bottom ends of the two insulating springs (811) are fixedly connected to the outer wall of the hollow detection needle tube (810); the top ends of the two insulating springs (811) are fixedly connected to the bottom ends of the first hollow tube (83) and the third hollow tube (88), respectively; and the lower surface of the connecting plate (63) is fixedly connected to a drying auxiliary mechanism (9).

2. A circuit board double-sided detection device according to claim 1, characterized in that: The drying auxiliary mechanism (9) comprises a drying box (91) fixedly connected to the lower surface of the connecting plate (63); an electric heating tube (92) is fixedly embedded at the top of the drying box (91); a conduit (93) is fixedly connected to the top of the drying box (91); a second normally closed solenoid valve (94) is fixedly connected to the top of the conduit (93); the top of the second normally closed solenoid valve (94) is fixedly connected to the outer wall of the elastic coil (61); a hose (95) is fixedly connected to the air nozzle at the bottom of the drying box (91); the bottom end of the hose (95) is fixedly connected to the outer wall of one of the hollow detection needle tubes (810); and an air jet hole (96) is provided at the bottom end of the hollow detection needle tube (810).

3. A circuit board double-sided detection device according to claim 1, characterized in that: A threaded hole is provided on the upper surface of the hollow storage box (13), and a sealing plug (22) is threadedly connected to the hole wall of the threaded hole. The interior of the hollow storage box (13) is filled with an anhydrous ethanol liquid layer (23).

4. A circuit board double-sided detection device according to claim 1, characterized in that: The cleaning assembly (7) comprises a wiping cotton block (71), the outer wall of the wiping cotton block (71) is fixedly sleeved with a sealing thread ring (72), and the bottom end of the rotating tube (62) is provided with a connecting thread that matches the sealing thread ring (72).

5. A circuit board double-sided detection device according to claim 1, characterized in that: The two hollow detection needle tubes (810) are made of copper, and the bending angles of the bottoms of the two hollow detection needle tubes (810) are both 15-25 degrees.

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