A circuit board welding series testing device with positioning correction

Abstract

The present invention relates to the technical field of circuit board serial testing, and discloses a circuit board welding serial testing device with positioning correction, comprising a gantry drive frame and a correction mechanism, the gantry drive frame is provided with a walking mechanism, the correction mechanism is installed on the walking mechanism, and the correction mechanism is connected with a tooling board; a positioning workbench and a test bench are sequentially arranged along the walking direction of the tooling board, a plurality of correction stations are continuously arranged along the length direction of the positioning workbench, a plurality of test stations are continuously arranged along the length direction of the test bench, a plurality of test stations and a plurality of correction stations are arranged one by one along the walking direction of the tooling board, the shape of the correction station matches the shape of a single circuit board, and each corner position of the correction station is provided with a photoelectric sensor, and the photoelectric sensor emits a signal upward. The position of the circuit board group can be corrected before the test, so that the circuit board group accurately falls within the visual test range, and there will be no missed detection.

Description

Technical Field

[0001] The invention relates to the technical field of circuit board series testing, in particular to a circuit board welding series testing device with positioning correction. Background Art

[0002] Since the size of the circuit boards produced by the circuit board manufacturers is fixed, the size of the circuit board is difficult to meet the actual use requirements. Before soldering the electronic components on the circuit board, the size of the circuit board needs to be adjusted. According to the user or actual production needs, the circuit board will be spliced ​​and expanded to form a large-size circuit board, that is, multiple standard-sized circuit boards are connected together. The connection methods of the circuit board include: welding and connector connection. Among them, welding includes PCB wire welding, PCB cable welding and direct welding between PCBs. Direct welding between PCBs has the advantages of high connection strength, low cost and high reliability. Therefore, direct welding between PCB boards is the most widely used method for circuit board expansion series connection.

[0003] After the circuit boards are welded in series, the circuit board group needs to be tested to determine whether the quality after series connection meets the requirements and whether the circuit boards are electrically conductive after series connection. Visual imaging technology is used to determine whether there are defects or scratches in the circuit board group, as well as whether the welding between the circuit boards meets the requirements and whether there is too much or too little welding. Conductive probes are used to connect the conductive test holes at both ends of the circuit board group to determine whether the circuit board group is electrically conductive. However, during the test, the circuit board group may be conveyed offset, resulting in the entire circuit board being unable to accurately fall within the visual inspection range, resulting in partial missed inspections of the circuit board group, affecting the test results of the circuit board. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a circuit board welding series testing device with positioning correction, which can correct the position of the circuit board group before testing so that the circuit board group falls accurately within the visual test range without missing any inspection.

[0005] The objective of the present invention is achieved through the following technical scheme: a circuit board welding series test device with positioning correction, comprising a gantry drive frame, a positioning workbench, a correction mechanism and a test bench, the gantry drive frame is provided with a walking mechanism, the correction mechanism is installed on the walking mechanism, the correction mechanism comprises a correction seat, a transverse sliding seat, a longitudinal sliding seat and a tooling plate, the correction seat is installed on the walking mechanism, the transverse sliding seat is slidably arranged at the bottom of the correction seat, the longitudinal sliding seat is slidably arranged at the bottom of the transverse sliding seat, the moving direction of the transverse sliding seat is perpendicular to the moving direction of the longitudinal sliding seat, a correction shaft is fixed on the top of the tooling plate, the correction shaft is rotatably connected to the longitudinal sliding seat, a plurality of negative pressure tubes are arranged on the tooling plate at equal intervals along its own length direction, and a suction cup is connected to the bottom of the negative pressure tube;

[0006] The positioning workbench and the test bench are arranged in sequence along the walking path of the tooling plate. The positioning workbench is continuously provided with a plurality of correction stations along its own length direction. The test bench is continuously provided with a plurality of test stations along its own length direction. The plurality of test stations and the plurality of correction stations are arranged in a one-to-one correspondence along the walking direction of the tooling plate. The shape of the correction station matches the shape of a single circuit board. Photoelectric sensors are arranged at each corner position of the correction station. The photoelectric sensors are embedded in the positioning workbench and emit signals upward.

[0007] In some embodiments, a transverse screw groove is provided at the bottom of the correction seat, a transverse screw is arranged in the transverse screw groove, the transverse screw is rotatably connected to the correction seat, a transverse slider is threadedly mounted on the transverse screw, the transverse slider is slidably adapted to the transverse screw groove, the transverse sliding seat is fixedly connected to the transverse slider, a first motor is installed on the side wall of the correction seat, the output shaft of the first motor is transmission-connected to the transverse screw, a longitudinal screw groove is provided at the bottom of the transverse sliding seat, a longitudinal screw groove is arranged in the longitudinal screw groove, the longitudinal screw is rotatably connected to the transverse sliding seat, a longitudinal slider is threadedly mounted on the longitudinal screw, the longitudinal slider is slidably adapted to the longitudinal screw groove, the longitudinal sliding seat is fixedly connected to the longitudinal slider, a second motor is installed on the side wall of the transverse sliding seat, the output shaft of the second motor is transmission-connected to the longitudinal screw.

[0008] In some embodiments, a T-shaped groove is provided at the bottom of the longitudinal sliding seat, a rack is provided at the bottom of the longitudinal sliding seat, a T-shaped slide is fixed on the top of the rack, the T-shaped slide is slidably adapted in the T-shaped groove, a gear is mounted on the correction shaft, the gear meshes with the rack, a pushing cylinder is installed at the bottom of the longitudinal sliding seat, and the telescopic shaft of the pushing cylinder is connected to the rack.

[0009] In some embodiments, the gantry driving frame includes a longitudinal frame and a crossbeam frame. There are two parallel longitudinal frames. Walking seats are fixed at both ends of the crossbeam frame. The two walking seats are respectively slidably arranged on the two longitudinal frames. A slide rail is fixed on the top of the longitudinal frame. A slide rail groove is formed at the bottom of the walking seat. The slide rail is adapted to be fitted in the slide rail groove. A sunken section is provided at the top of the longitudinal frame. A walking rack is fixed on the sunken section of the longitudinal frame. The walking rack is parallel to the slide rail. A walking gear is rotatably arranged at the bottom of the walking seat. The walking gear meshes with the walking rack. A walking motor is built in the walking seat. The output shaft of the walking motor is connected to the walking gear.

[0010] In some embodiments, the walking mechanism includes a crossbeam sliding seat and a lifting cylinder. A crossbeam sliding groove is formed in the side wall of the crossbeam frame. A crossbeam lead screw is rotatably arranged in the crossbeam sliding groove. A crossbeam slider is threadedly sleeved on the crossbeam lead screw. The crossbeam slider is slidably adapted to the crossbeam sliding groove. The crossbeam sliding seat is fixed on the crossbeam slider. A cylinder mounting plate is fixed on the side wall of the crossbeam sliding seat. The cylinder body of the lifting cylinder is mounted on the cylinder mounting plate. The telescopic shaft of the lifting cylinder is fixedly connected to the correction seat.

[0011] In some embodiments, turning shafts are fixed at both ends of the test bench in its own length direction. The turning shafts are rotatably connected to the sliding support plates. The bottom of the sliding support plates is slidably adapted to a ground rail. The ground rail is fixed on the ground. A turning motor is arranged on one of the sliding support plates. The turning motor is传动连接 with one of the turning shafts. An elevating test bench is arranged below the test bench. A supporting cylinder is vertically arranged below the elevating test bench. The telescopic shaft of the supporting cylinder is connected to the elevating test bench. A test negative pressure cavity is arranged inside the test bench. A number of first negative pressure holes are formed at the test station of the test bench. The first negative pressure holes communicate with the test negative pressure cavity. A negative pressure cavity is arranged inside the elevating test bench. A number of second negative pressure holes are formed at the top of the elevating test bench. The second negative pressure holes communicate with the negative pressure cavity. A vision test mechanism is arranged on the gantry driving frame.

[0012] In some embodiments, mechanical limits are arranged on the ground rail. When the sliding support plate abuts against the mechanical limit, the test bench is located directly above the elevating test bench. A linear driving mechanism is arranged on one side of the sliding support plate. The linear driving mechanism includes a driving base and a screw. The shape of the driving base is U-shaped. The screw is rotatably connected to the driving base. A driving slider is threadedly sleeved on the screw. The driving slider is slidably adapted to the driving base. A side support plate is fixed on the side wall of the sliding support plate. The side support plate is fixedly connected to the driving slider.

[0013] In some embodiments, one end of the screw rod is slidably sleeved with a first special-shaped gear, one end of the driving base is installed with a driving motor, the output shaft of the driving motor is connected to the second special-shaped gear, a plurality of first wedge-shaped teeth are fixed to the end face of the first special-shaped gear close to the second special-shaped gear, the plurality of first wedge-shaped teeth are evenly distributed around the circumferential direction of the first special-shaped gear, a first wedge-shaped groove is formed between two adjacent first wedge-shaped teeth, a plurality of second wedge-shaped teeth are fixed to the end face of the second special-shaped gear close to the first special-shaped gear, the plurality of second wedge-shaped teeth are evenly distributed around the circumferential direction of the second special-shaped gear, a second wedge-shaped groove is formed between two adjacent second wedge-shaped teeth, the first wedge-shaped teeth are meshed in the second wedge-shaped groove, the second wedge-shaped teeth are meshed in the first wedge-shaped groove, and the wedge angle of the first wedge-shaped teeth is different from the wedge angle of the second wedge teeth;

[0014] The fixing sleeve on the screw rod is provided with a shaft shoulder, and the screw rod is provided with an idle spring, and two ends of the idle spring are respectively connected to the shaft shoulder and the first special-shaped gear.

[0015] In some embodiments, the visual testing mechanism includes a mounting beam and a visual testing box, the two ends of the mounting beam are respectively slidably set on the two gantry drive frames, a test cylinder is installed at the bottom of the mounting beam, the telescopic axis of the test cylinder is connected to the visual testing box, the bottom of the visual testing box is open, a visual mounting plate is fixed in the visual testing box, a plurality of visual stations are provided at the bottom of the visual mounting plate, and the plurality of visual stations correspond one-to-one to the plurality of test stations, a visual imaging camera is provided at the center position of the visual station, a positive probe and a negative probe are provided on the visual mounting plate, and the positive probe and the negative probe respectively correspond to the test circuit holes at both ends of the series circuit board.

[0016] In some embodiments, the mounting beam is provided with a track groove adapted to the slide rail, a test gear is rotatably provided at the bottom of the mounting beam, the test gear engages with the travel rack, a test motor is built into the mounting beam, and an output shaft of the test motor is connected to the test gear.

[0017] The beneficial effects of the present invention are:

[0018] 1. The circuit board group is transferred by adsorbing it through a negative pressure tube, and the circuit board group is placed in a correction station. Each circuit board corresponds to a correction station. When the circuit board group does not completely fall into the correction station, the circuit board group will block the photoelectric sensor, thereby blocking the transmission of the photoelectric signal, so as to judge whether the test position of the circuit board group is accurate. The offset of the circuit board group is judged according to the blocking situation of the photoelectric sensor. The correction mechanism adjusts the position of the circuit board group according to the offset situation, so that the circuit board group is completely located in the correction station. After the position adjustment of the circuit board group is completed, it is transferred to the test station for testing. The correction station corresponds to the test station one by one, so that the position of the circuit board group is corrected before the test, so that the circuit board group is accurately located within the visual inspection range, and the comprehensive inspection of the circuit board group is completed. There will be no missed inspections, and accurate test results can be obtained.

[0019] 2. The test bench absorbs the circuit board group, rotates 180° to turn the circuit board group over, and then the lifting test bench rises to carry the circuit board group, so that the circuit board group falls on the lifting test bench, and then the test bench moves horizontally away from the top of the lifting test bench, thereby turning the circuit board group 180°, and then testing the other side of the circuit board group, thereby completing the comprehensive test of the circuit board group and making the test results more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A three-dimensional schematic diagram of a circuit board welding series testing device with positioning correction according to the present invention Figure 1 ;

[0021] Figure 2 A top view of a circuit board welding series testing device with positioning correction according to the present invention;

[0022] Figure 3 A three-dimensional schematic diagram of a circuit board welding series testing device with positioning correction according to the present invention Figure 2 ;

[0023] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0024] Figure 5 A three-dimensional schematic diagram of a circuit board welding series testing device with positioning correction according to the present invention Figure 3 ;

[0025] Figure 6 for Figure 5 Enlarged view of point B in the middle;

[0026] Figure 7 A three-dimensional schematic diagram of a circuit board welding series testing device with positioning correction according to the present invention Figure 4 ;

[0027] Figure 8 A three-dimensional schematic diagram of a circuit board welding series testing device with positioning correction according to the present invention Figure 5 ;

[0028] Fig. 9 for Figure 8 Enlarged view of point C in the middle;

[0029] Fig.10 It is a schematic diagram of the internal structure of a visual test box in a circuit board welding series test device with positioning correction of the present invention;

[0030] In the figure, 1-gantry drive frame, 2-positioning workbench, 3-correction seat, 4-lateral sliding seat, 5-longitudinal sliding seat, 6-tooling plate, 7-correction axis, 8-negative pressure tube, 9-suction cup, 10-test bench, 11-correction station, 12-test station, 13-photoelectric sensor, 14-lateral lead screw groove, 15-lateral lead screw, 16-lateral slider, 17-first motor, 18-longitudinal lead screw groove, 19-longitudinal lead screw, 20-longitudinal slider, 21-second motor, 22-T-shaped slide groove, 23-rack, 24-T-shaped slide, 25-gear, 26-pushing cylinder, 27-longitudinal frame, 28-beam frame, 29-travel seat, 30-slide rail, 31-slide rail groove, 32-travel rack, 33-travel gear, 34-beam slide seat, 35- Lifting cylinder, 36-beam slide, 37-beam lead screw, 38-beam slider, 39-cylinder mounting plate, 40-flip axis, 41-ground rail, 42-flip motor, 43-lifting test bench, 44-support cylinder, 45-first negative pressure hole, 46-second negative pressure hole, 47-mechanical limit, 48-driving base, 49-screw, 50-driving slider, 51-side support plate, 52-first special-shaped gear, 53-driving motor, 54-second special-shaped gear, 55-first wedge-shaped tooth, 56-second wedge-shaped tooth, 57-shoulder, 58-idle spring, 59-mounting beam, 60-visual test box, 61-visual mounting plate, 62-visual imaging camera, 63-test gear, 64-positive probe, 65-negative probe, 66-sliding support plate. DETAILED DESCRIPTION

[0031] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0032] like Figures 1 to 10As shown, a circuit board welding series test device with positioning correction includes a gantry drive frame 1, a positioning workbench 2, a correction mechanism and a test bench 10. The gantry drive frame 1 is provided with a walking mechanism, and the correction mechanism is installed on the walking mechanism. The correction mechanism includes a correction seat 3, a transverse sliding seat 4, a longitudinal sliding seat 5 and a tooling plate 6. The correction seat 3 is installed on the walking mechanism, the transverse sliding seat 4 is slidably arranged at the bottom of the correction seat 3, and the longitudinal sliding seat 5 is slidably arranged at the bottom of the transverse sliding seat 4. The moving direction of the transverse sliding seat 4 is vertical Perpendicular to the moving direction of the longitudinal sliding seat 5, a correction shaft 7 is fixed on the top of the tooling plate 6, and the correction shaft 7 is rotatably connected to the longitudinal sliding seat 5. A number of negative pressure tubes 8 are arranged on the tooling plate 6 at equal intervals along its own length direction, and a suction cup 9 is connected to the bottom of the negative pressure tube 8. The negative pressure tube 8 is connected to the negative pressure pump through an air pipe, and the suction cup 9 generates negative pressure to adsorb the circuit board group through the negative pressure pump. The distance between two adjacent suction cups 9 is equal to the width of the circuit board, so that each circuit board in the circuit board group corresponds to a suction cup 9 for adsorption transfer, ensuring the stability of the transfer;The positioning workbench 2 and the test bench 10 are arranged in sequence along the walking path of the tooling board 6. A plurality of correction stations 11 are continuously arranged on the positioning workbench 2 along its own length direction. A plurality of test stations 12 are continuously arranged on the test bench 10 along its own length direction. The plurality of test stations 12 and the plurality of correction stations 11 are arranged one by one in the walking direction of the tooling board 6. The shape of the correction station 11 matches the shape of a single circuit board. Photoelectric sensors 13 are arranged at each corner of the correction station 11. The photoelectric sensors 13 are embedded in the positioning workbench 2 and emit signals upward. The correction stations 11 do not need to be all opened. A corresponding number of correction stations 11 are opened according to the number of circuit boards in the circuit board group. The correction station 11 at one end is taken as the zero point, the photoelectric sensor 13 on the correction station 11 in the open state sends a photoelectric signal, and the photoelectric sensors 13 on the other correction stations 11 are in the closed state. The corresponding number of correction stations 11 are opened in sequence from the zero point according to the number of circuit boards. The circuit boards are connected in series by direct welding and sent out by the conveyor belt so that they are located on the moving path of the suction cup 9. The suction cup 9 then absorbs the circuit board group for transfer, and the circuit board group is transferred to the correction station 11 of the positioning workbench 2. It should be noted that the suction cup 9 is still in a negative pressure adsorption state, so that the circuit board is suspended above the positioning workbench 2, which is convenient for adjusting the position of the circuit board group. The circuit board at one end of the circuit board group is located in the correction station 11 at the zero position, so that the circuit board group is initially placed in the correction station 11, and each circuit board corresponds to a correction station 11. When the circuit board group does not completely fall into the correction station 11, the circuit board will block the photoelectric sensor 13, thereby blocking the transmission of the photoelectric signal, so as to judge whether the test position of the circuit board group is accurate, and the offset of the circuit board group is judged according to the blocking condition of the photoelectric sensor 13. The correction mechanism adjusts the position of the circuit board group according to the offset condition so that the circuit board group is completely located in the correction station 11. After the position adjustment of the circuit board group is completed, it is transferred to the test station 12 for testing, and the correction station 11 and the test station 1 2 one-to-one correspondence, so that the position of the circuit board group is corrected before the test, so that the circuit board group is accurately located within the visual inspection range, and the comprehensive inspection of the circuit board group is completed without missing inspections, and accurate test results can be obtained; the specific correction process of the circuit board group is: when the circuit board group only has a lateral offset, the photoelectric sensors 13 at either end of the length direction of the positioning workbench 2 are blocked. At this time, the lateral sliding seat 4 slides on the correction seat 3, so that the circuit board group moves along the length direction of the positioning workbench 2, and the moving direction moves close to the photoelectric sensor 13 that is not blocked at the end of the positioning workbench 2, until all the photoelectric sensors 13 are not blocked and stop moving, completing the position adjustment of the circuit board group;When the circuit board group only has a longitudinal offset, the photoelectric sensors 13 on either side of the width direction of the positioning workbench 2 are blocked. At this time, the longitudinal sliding seat 5 moves on the transverse sliding seat 4, so that the circuit board group moves along the width direction of the positioning workbench 2, and the moving direction is close to the photoelectric sensors 13 on one side of the positioning workbench 2 that are not blocked. When the photoelectric sensors 13 on one side and one end of the positioning workbench 2 are blocked, it indicates that the circuit board group has undergone a transverse and longitudinal offset. At this time, the transverse sliding seat 4 and the longitudinal sliding seat 5 cooperate to move to complete the position correction of the circuit board group. When the photoelectric sensors 13 on one side and one end of the positioning workbench 2 are blocked, and some of the photoelectric sensors 13 are partially blocked, it indicates that the circuit board group has tilted. At this time, the correction shaft 7 drives the tooling plate 6 to deflect, thereby driving the circuit board group to deflect. Turn the dial to correct; In summary, the circuit board group is driven to move horizontally by the horizontal sliding seat 4, the circuit board group is driven to move longitudinally by the longitudinal sliding seat 5, and the circuit board group is driven to deflect by the correction shaft 7, so that the circuit board group has three degrees of freedom of movement. The three degrees of freedom of movement cooperate with each other, so that the circuit board group is completely located in the correction station 11, that is, all the turned-on photoelectric sensors 13 are not blocked, indicating that the circuit board group has completed the position correction. At this time, the circuit board group with position correction is transferred to the test station 12 of the test bench 10. Since the correction station 11 corresponds to the test station 12 one by one, the circuit board group is completely located in the test station 12, and the test station 12 is the imaging range of the visual test, so that the circuit board group is completely located in the visual imaging range, and there will be no missed detection, and accurate test results can be obtained. It is worth noting that the correction station 11 and the test station 12 are virtual imaginary stations. The correction station 11 is determined by the photoelectric sensor 13, and the test station 12 is determined by the visual testing mechanism. ;

[0033] In some embodiments, Figures 1 to 7As shown, a transverse screw groove 14 is provided at the bottom of the correction seat 3, a transverse screw groove 14 is provided with a transverse screw 15, the transverse screw 15 is rotatably connected to the correction seat 3, a transverse slider 16 is threadedly sleeved on the transverse screw 15, the transverse slider 16 is slidably adapted to the transverse screw groove 14, the transverse sliding seat 4 is fixedly connected to the transverse slider 16, a first motor 17 is installed on the side wall of the correction seat 3, the output shaft of the first motor 17 is transmission-connected to the transverse screw 15, the first motor 17 drives the transverse screw 15 to rotate, and since the transverse slider 16 is slidably adapted in the transverse screw groove 14, the rotational freedom of the transverse slider 16 is limited, so that the transverse slider 16 moves along the axis of the transverse screw 15 The lateral sliding seat 4 moves linearly, thereby driving the lateral sliding seat 4 to move linearly. The lateral sliding seat 4 drives the longitudinal sliding seat 5 and the tooling plate 6 thereon to move linearly, thereby driving the circuit board group to move linearly to complete the position adjustment. A longitudinal screw groove 18 is provided at the bottom of the lateral sliding seat 4. A longitudinal screw 19 is arranged in the longitudinal screw groove 18. The longitudinal screw 19 is rotatably connected to the lateral sliding seat 4. A longitudinal slider 20 is threadedly sleeved on the longitudinal screw 19. The longitudinal slider 20 is slidably adapted to the longitudinal screw groove 18. The longitudinal sliding seat 5 is fixedly connected to the longitudinal slider 20. A second motor 21 is installed on the side wall of the lateral sliding seat 4. The output shaft of the second motor 21 is transmission-connected to the longitudinal screw 19 The second motor 21 drives the longitudinal lead screw 19 to rotate, so that the longitudinal slider 20 makes a linear motion along the axial direction of the longitudinal lead screw 19, thereby driving the longitudinal sliding seat 5 and the tooling plate 6 to make a linear motion, and the moving direction is opposite to the moving direction of the transverse sliding seat 4, and the position state of the circuit board group can be adjusted along the length direction and width direction of the positioning workbench 2; a T-shaped slide groove 22 is provided at the bottom of the longitudinal sliding seat 5, a rack 23 is provided at the bottom of the longitudinal sliding seat 5, a T-shaped slide bar 24 is fixed on the top of the rack 23, and the T-shaped slide bar 24 is slidably adapted in the T-shaped slide groove 22, a gear 25 is mounted on the correction shaft 7, the gear 25 meshes with the rack 23, and the bottom of the longitudinal sliding seat 5 is provided with a gear 25. A pushing cylinder 26 is installed, and the telescopic shaft of the pushing cylinder 26 is connected to the rack 23. Since the offset angle of the circuit board group is small, it is only necessary to drive the tooling plate 6 to deflect within a small range, so that the meshing of the rack 23 and the gear 25 is used to drive the correction shaft 7 to deflect. Specifically, the rack 23 is moved by the extension and retraction of the pushing cylinder 26, the rack 23 drives the gear 25 to deflect, the gear 25 drives the correction shaft 7 to deflect, and the correction shaft 7 drives the tooling plate 6 to deflect, so as to adjust the position of the circuit board group. After the pushing cylinder 26 stops extending and retracting, the deflected position of the tooling plate 6 can be stably maintained to stabilize the position of the circuit board group and ensure that there will be no accidental offset after the position of the circuit board group is corrected.

[0034] In some embodiments, Figures 1 to 6As shown in the figure, the gantry drive frame 1 includes a longitudinal frame 27 and a crossbeam frame 28. There are two parallel longitudinal frames 27. Walking seats 29 are fixed at both ends of the crossbeam frame 28. The two walking seats 29 are respectively slidably arranged on the two longitudinal frames 27. A slide rail 30 is fixed at the top of the longitudinal frame 27. A slide rail groove 31 is opened at the bottom of the walking seat 29. The slide rail 30 is fitted in the slide rail groove 31. A sunken section is provided at the top of the longitudinal frame 27. A walking rack 32 is fixed on the sunken section of the longitudinal frame 27. The walking rack 32 is parallel to the slide rail 30. A walking gear 33 is rotatably arranged at the bottom of the walking seat 29. The walking gear 33 meshes with the walking rack 32. A walking motor is built in the walking seat 29. The output shaft of the walking motor is connected to the walking gear 33. The longitudinal frame 27 is in a U-shaped shape. By driving the walking gear 33 to rotate with the walking motor, since the walking gear 33 meshes with the walking rack 32, the walking gear 33 rolls on the walking rack 32, thereby driving the walking seat 29 to slide along the length direction of the longitudinal frame 27, and further driving the circuit board group to transfer. The walking mechanism includes a crossbeam slide seat 34 and a lifting cylinder 35. A crossbeam slide groove 36 is opened on the side wall of the crossbeam frame 28. A crossbeam lead screw 37 is rotatably arranged in the crossbeam slide groove 36. A crossbeam slider 38 is threadedly sleeved on the crossbeam lead screw 37. The crossbeam slider 38 is slidably fitted in the crossbeam slide groove 36. The crossbeam slide seat 34 is fixed on the crossbeam slider 38. A lead screw motor is installed at one end of the crossbeam slide seat 34. The output shaft of the lead screw motor is drivingly connected to the crossbeam lead screw 37. By driving the crossbeam lead screw 37 to rotate with the lead screw motor, the crossbeam slider 38 makes a linear movement along the axial direction of the crossbeam lead screw 37, which can adjust the zero position of the tooling plate 6, so that the suction cup 9 at one end of the tooling plate 6 corresponds to the correction station 11 at the zero position. A cylinder mounting plate 39 is fixed on the side wall of the crossbeam slide seat 34. The cylinder body of the lifting cylinder 35 is mounted on the cylinder mounting plate 39. The telescopic shaft of the lifting cylinder 35 is fixedly connected to the correction seat 3. By driving the telescopic movement of the lifting cylinder 35, the correction seat 3 is driven to move up and down, thereby driving the tooling plate 6 to move up and down, so that the tooling plate 6 can adsorb the circuit board to move, realizing the picking and placing of the circuit board.

[0035] In some embodiments, such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 8As shown, both ends of the test bench 10 in the length direction are fixed with a flip shaft 40, the flip shaft 40 is rotatably connected to the sliding support plate 66, the bottom of the sliding support plate 66 is slidably adapted to be equipped with a ground rail 41, the ground rail 41 is fixed to the ground, one of the sliding support plates 66 is provided with a flip motor 42, the flip motor 42 is transmission-connected to one of the flip shafts 40, a lifting test bench 43 is provided below the test bench 10, a supporting cylinder 44 is vertically provided below the lifting test bench 43, the telescopic shaft of the supporting cylinder 44 is connected to the lifting test bench 43, a test negative pressure chamber is provided inside the test bench 10, and the test bench 10 is provided with a plurality of first negative pressure holes at the test station 12 45, the first negative pressure hole 45 is connected to the test negative pressure chamber, the lifting test platform 43 is provided with a negative pressure chamber, the top of the lifting test platform 43 is provided with a plurality of second negative pressure holes 46, the second negative pressure holes 46 are connected to the negative pressure chamber, and a visual test mechanism is provided on the gantry drive frame 1, the visual test mechanism includes a mounting crossbeam 59 and a visual test box 60, the two ends of the mounting crossbeam 59 are respectively slidably arranged on the two gantry drive frames 1, a test cylinder is installed at the bottom of the mounting crossbeam 59, the telescopic shaft of the test cylinder is connected to the visual test box 60, the bottom of the visual test box 60 is open, a visual mounting plate 61 is fixed in the visual test box 60, and the bottom of the visual mounting plate 61 is provided There are multiple visual stations, and the multiple visual stations correspond to the multiple test stations 12 one by one. A visual imaging camera 62 is set in the middle position of the visual station. The positive probe 64 and the negative probe 65 are on the visual mounting plate 61. The positive probe 64 and the negative probe 65 correspond to the test circuit holes at both ends of the series circuit board respectively. When the circuit board group completes the position correction on the positioning workbench 2, the crossbeam frame 28 moves on the longitudinal frame 27 to drive the circuit board group to move close to the test bench 10, and the circuit board group is placed on the test station 12 on the test bench 10. The test bench 10 is connected to the negative pressure pump to generate negative pressure, and the circuit board group is adsorbed on the test station 12 through the first negative pressure hole 45 to ensure The stability of the circuit board group is maintained to ensure that no deviation occurs during the test. Then, the test cylinder drives the visual test box 60 to move downward so that the bottom of the visual test box 60 contacts the test bench 10 to form a closed test environment. A light source is provided in the visual test box 60, and the circuit board is visually imaged by the visual imaging camera 62. Since the position of the circuit board group is corrected before the test, the circuit board group can be completely located within the imaging range of the visual imaging camera 62, thereby achieving full coverage testing of the circuit board group. Whether the welding of the circuit board meets the requirements and whether there are damages or scratches on the surface of the circuit board are determined by visual imaging;While performing visual inspection, the positive probe 64 and the negative probe 65 are respectively inserted into the test holes at both ends of the circuit board group. After the power is turned on, it is determined whether the entire circuit board group is in an overall conductive state after welding. After the upper surface test of the circuit board group meets the requirements, the lower surface of the circuit board group is tested. To complete the comprehensive test of the circuit board group, the circuit board needs to be flipped 180°. The specific flipping process is that the test bench 10 adsorbs the circuit board group, the flip motor 42 drives the flip shaft 40 to rotate 180°, and the flip shaft 40 drives the test bench 10 to rotate 180°, thereby flipping the circuit board group 180°. The flip shaft 40 is fixed in the middle of the test bench 10, so that the circuit board group is still within the imaging range of the visual imaging camera 62 after flipping 180°, and then the lifting test bench 43 rises to carry the circuit board group, so that the circuit board group contacts the lifting test bench 43, and then the lifting test bench 43 generates negative pressure to adsorb the circuit board group, and the test bench 10 stops generating negative pressure and releases the circuit board group, thereby the circuit board The group is switched from the test bench 10 to the lifting test bench 43, and then the test bench 10 is moved horizontally away from the top of the lifting test bench 43, so that the circuit board group is flipped 180° and exposed on the top, and the visual test box 60 moves down to contact the lifting test bench 43 for visual inspection, so as to test the other side of the circuit board group, thereby completing the comprehensive test of the circuit board group and making the test result more accurate; in specific implementation, the positive probe 64 and the negative probe 65 are connected to the visual installation board 61 by threading, which is convenient for installation and disassembly. According to the series size of the test circuit board, the positive probe 64 and the negative probe 65 are installed at the corresponding position of the visual installation board 61, so as to match the test position of the circuit board group after series connection, and the holes for installing the positive probe 64 and the negative probe 65 are provided with electrode sheets, which are connected to the test circuit in the visual installation board 61, so that the positive probe 64 and the negative probe 65 are automatically connected to the test circuit after connecting the visual installation board 61, completing the conductive test of the circuit board group. ;

[0036] Furthermore, if Figures 1 to 7 As shown, the mounting beam 59 is provided with a track groove adapted to the slide rail 30, and a test gear 63 is rotatably provided at the bottom of the mounting beam 59, and the test gear 63 meshes with the travel rack 32. A test motor is built into the mounting beam 59, and the output shaft of the test motor is connected to the test gear 63. The test motor drives the test gear 63 to rotate, so that the test gear 63 can travel on the travel rack 32, thereby driving the visual test box 60 to move along the length direction of the longitudinal frame 27. When the tooling plate 6 grabs the circuit board group and places it on the test bench 10, the mounting beam 59 drives the visual test box 60 to move away, and the tooling plate 6 lowers the circuit board group and resets to grab the next circuit board group for position correction. At this time, the mounting beam 59 drives the visual test box 60 to reset and test the circuit board group on the test bench 10, so that there is no interference between the visual testing mechanism and the correction mechanism.

[0037] In some embodiments, as Figure 1 , Figure 8 and Fig. 9 shown, a mechanical limit 47 is provided on the ground rail 41. When the sliding support plate 66 abuts against the mechanical limit 47, the test bench 10 is located directly above the lifting test bench 43. A linear drive mechanism is provided on one side of the sliding support plate 66. The linear drive mechanism includes a drive base 48 and a screw 49. The drive base 48 is in a U-shaped configuration. The screw 49 is rotatably connected to the drive base 48. A drive slider 50 is threadedly sleeved on the screw 49. The drive slider 50 is slidably adapted to the drive base 48. A side support plate 51 is fixed to the side wall of the sliding support plate 66. The side support plate 51 is fixedly connected to the drive slider 50. A robotic arm is provided on one side of the lifting test bench 43. The robotic arm also adsorbs the circuit board group in a negative pressure manner. After the circuit board group on the lifting test bench 43 is tested, the robotic arm unloads the circuit board group according to the test results. After the circuit board group is unloaded, the test bench 10 needs to be reset. The mechanical limit 47 enables the test bench 10 to be accurately reset to its original position. By driving the screw 49 to rotate, the drive slider 50 moves along the axial direction of the screw 49. The drive slider 50 drives the sliding support plate 66 to move on the ground rail 41 through the side support plate 51, so that the test bench 10 is moved away from above the lifting test bench 43. When the test bench 10 is reset, the screw 49 rotates in the reverse direction to move the sliding support plate 66 in the reverse direction to reset. When the sliding support plate 66 contacts the mechanical limit 47, the sliding support plate 66 prevents the test bench 10 from continuing to move, so that the test bench 10 can be accurately reset.

[0038] Further, as Figure 8 and Fig. 9As shown, one end of the screw rod 49 is slidably sleeved with a first special-shaped gear 52, one end of the driving base 48 is installed with a driving motor 53, the output shaft of the driving motor 53 is connected to a second special-shaped gear 54, a plurality of first wedge-shaped teeth 55 are fixed to the end surface of the first special-shaped gear 52 close to the second special-shaped gear 54, the plurality of first wedge-shaped teeth 55 are evenly distributed around the circumferential direction of the first special-shaped gear 52, a first wedge-shaped groove is formed between two adjacent first wedge-shaped teeth 55, a plurality of second wedge-shaped teeth 56 are fixed to the end surface of the second special-shaped gear 54 close to the first special-shaped gear 52, and a plurality of second wedge-shaped teeth 57 are fixed to the end surface of the second special-shaped gear 54 close to the first special-shaped gear 52. The teeth 56 are evenly distributed around the circumference of the second special-shaped gear 54, and a second wedge-shaped groove is formed between two adjacent second wedge-shaped teeth 56. The first wedge-shaped tooth 55 is meshed in the second wedge-shaped groove, and the second wedge-shaped tooth 56 is meshed in the first wedge-shaped groove. The wedge angle of the first wedge-shaped tooth 55 is different from the wedge angle of the second wedge-shaped tooth 56. A shaft shoulder 57 is fixedly sleeved on the screw 49, and an idle spring 58 is sleeved on the screw 49. The two ends of the idle spring 58 are respectively connected to the shaft shoulder 57 and the first special-shaped gear 52. The driving motor 53 is driven by the meshing of the first special-shaped gear 52 and the second special-shaped gear 54. The screw rod 49 is driven to rotate, so that the driving slider 50 drives the sliding support plate 66 to move, and the sliding support plate 66 drives the test bench 10 to move. When the sliding support plate 66 abuts against the mechanical limit 47, the movement freedom of the sliding support plate 66 is restricted, so that the rotation freedom of the driving slider 50 is restricted. At this time, the driving motor 53 cannot be stopped immediately due to the error, so that the output torque of the driving motor 53 gradually increases. Since the wedge angle of the first wedge tooth 55 is different from the wedge angle of the second wedge tooth 56, a friction is generated at the meshing position of the first wedge tooth 55 and the second wedge tooth 56. Along the axial force of the screw rod 49, after the output torque of the drive motor 53 increases, the axial force gradually increases, so that the first special-shaped gear 52 can overcome the force of the idling spring 58 and slide, thereby separating the first special-shaped gear 52 from the second special-shaped gear 54, so that the drive motor 53 idles, thereby achieving the purpose of protecting the drive motor 53 from damage. The design of this structure does not require precise rotation accuracy for the drive motor 53, and it only needs to ensure that the running time of the drive motor 53 can drive the sliding support plate 66 to contact the mechanical limit 47, thereby reducing the requirements for the drive motor 53.

[0039] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "two ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention; and it is known to those skilled in the art that the beneficial effects to be achieved by the present invention are only to achieve better beneficial effects under specific circumstances compared with the current implementation schemes in the prior art, rather than to directly achieve the best use effect in the industry.

[0040] The above is only a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art shall not deviate from the spirit and scope of the present invention, and shall be within the scope of protection of the claims attached to the present invention.

Claims

1. A circuit board welding series test device with positioning correction, characterized in that: The invention comprises a gantry drive frame (1), a positioning workbench (2), a correction mechanism and a test bench (10), wherein the gantry drive frame (1) is provided with a walking mechanism, the correction mechanism is mounted on the walking mechanism, the correction mechanism comprises a correction seat (3), a transverse sliding seat (4), a longitudinal sliding seat (5) and a tooling plate (6), the correction seat (3) is mounted on the walking mechanism, the transverse sliding seat (4) is slidably arranged at the bottom of the correction seat (3), the longitudinal sliding seat (5) is slidably arranged at the bottom of the transverse sliding seat (4), the moving direction of the transverse sliding seat (4) is perpendicular to the moving direction of the longitudinal sliding seat (5), a correction shaft (7) is fixed on the top of the tooling plate (6), the correction shaft (7) is rotatably connected to the longitudinal sliding seat (5), a plurality of negative pressure tubes (8) are arranged on the tooling plate (6) at equal intervals along its length direction, and a suction cup (9) is connected to the bottom of the negative pressure tube (8); The positioning workbench (2) and the test bench (10) are arranged in sequence along the travel path of the tooling plate (6); a plurality of correction stations (11) are continuously arranged on the positioning workbench (2) along its length direction; a plurality of test stations (12) are continuously arranged on the test bench (10) along its length direction; the plurality of test stations (12) and the plurality of correction stations (11) are arranged in a one-to-one correspondence along the travel direction of the tooling plate (6); the shape of the correction station (11) matches the shape of a single circuit board; a photoelectric sensor (13) is arranged at each corner position of the correction station (11); the photoelectric sensor (13) is embedded in the positioning workbench (2) and emits a signal upward; The gantry drive frame (1) comprises a longitudinal frame (27) and a cross beam frame (28), wherein two longitudinal frames (27) are arranged in parallel, and a travel seat (29) is fixed at both ends of the cross beam frame (28), and the two travel seats (29) are respectively slidably arranged on the two longitudinal frames (27), a slide rail (30) is fixed at the top of the longitudinal frame (27), and a slide rail groove (31) is provided at the bottom of the travel seat (29), and the slide rail (30) is adapted in the slide rail groove (31), and a sinking section is provided at the top of the longitudinal frame (27), and a travel rack (32) is fixed on the sinking section of the longitudinal frame (27), and the travel rack (32) is parallel to the slide rail (30), and a travel gear (33) is rotatably arranged at the bottom of the travel seat (29), and the travel gear (33) meshes with the travel rack (32), and a travel motor is built in the travel seat (29), and the output shaft of the travel motor is connected to the travel gear (33); The test bench (10) is fixed with a flip shaft (40) at both ends in the length direction thereof, the flip shaft (40) being rotatably connected to a sliding support plate (66), the bottom of the sliding support plate (66) being slidably adapted to be provided with a ground rail (41), the ground rail (41) being fixed to the ground, a flip motor (42) being provided on one of the sliding support plates (66), the flip motor (42) being transmission-connected to one of the flip shafts (40), a lifting test bench (43) being provided below the test bench (10), a supporting cylinder (41) being vertically provided below the lifting test bench (43) 44), the telescopic shaft of the supporting cylinder (44) is connected to the lifting test platform (43), a test negative pressure chamber is arranged inside the test platform (10), a plurality of first negative pressure holes (45) are opened at the test station (12) of the test platform (10), the first negative pressure holes (45) are connected to the test negative pressure chamber, a negative pressure chamber is arranged inside the lifting test platform (43), a plurality of second negative pressure holes (46) are opened on the top of the lifting test platform (43), the second negative pressure holes (46) are connected to the negative pressure chamber, and a visual test mechanism is arranged on the gantry drive frame (1); The visual test mechanism comprises a mounting crossbeam (59) and a visual test box (60), wherein two ends of the mounting crossbeam (59) are respectively slidably arranged on the two gantry drive frames (1), a test cylinder is installed at the bottom of the mounting crossbeam (59), and a telescopic shaft of the test cylinder is connected to the visual test box (60), the bottom of the visual test box (60) is open, a visual mounting plate (61) is fixed in the visual test box (60), a plurality of visual workstations are arranged at the bottom of the visual mounting plate (61), the plurality of visual workstations correspond to the plurality of test workstations (12) one by one, a visual imaging camera (62) is arranged at the center of the visual workstation, a positive probe (64) and a negative probe (65) are arranged on the visual mounting plate (61), and the positive probe (64) and the negative probe (65) correspond to the test circuit holes at the two ends of the series circuit board respectively.

2. A circuit board welding series test device with positioning correction according to claim 1, characterized in that: The bottom of the correction seat (3) is provided with a transverse screw groove (14), a transverse screw (15) is arranged in the transverse screw groove (14), the transverse screw (15) is rotatably connected to the correction seat (3), a transverse slider (16) is threadedly sleeved on the transverse screw (15), the transverse slider (16) is slidably adapted to the transverse screw groove (14), the transverse sliding seat (4) is fixedly connected to the transverse slider (16), a first motor (17) is installed on the side wall of the correction seat (3), the output shaft of the first motor (17) is transmission-connected to the transverse screw (15), the transverse A longitudinal screw groove (18) is provided at the bottom of the sliding seat (4), a longitudinal screw groove (18) is provided with a longitudinal screw (19), the longitudinal screw (19) is rotatably connected to the transverse sliding seat (4), a longitudinal slider (20) is threadedly sleeved on the longitudinal screw (19), the longitudinal slider (20) is slidably adapted to the longitudinal screw groove (18), the longitudinal sliding seat (5) is fixedly connected to the longitudinal slider (20), a second motor (21) is installed on the side wall of the transverse sliding seat (4), and the output shaft of the second motor (21) is drivingly connected to the longitudinal screw (19).

3. A circuit board welding series test device with positioning correction according to claim 2, characterized in that: A T-shaped slide groove (22) is provided at the bottom of the longitudinal sliding seat (5), a rack (23) is provided at the bottom of the longitudinal sliding seat (5), a T-shaped slide bar (24) is fixed on the top of the rack (23), the T-shaped slide bar (24) is slidably adapted in the T-shaped slide groove (22), a gear (25) is mounted on the correction shaft (7), the gear (25) meshes with the rack (23), a pushing cylinder (26) is installed at the bottom of the longitudinal sliding seat (5), and the telescopic shaft of the pushing cylinder (26) is connected to the rack (23).

4. A circuit board welding series test device with positioning correction according to claim 3, characterized in that: The walking mechanism comprises a crossbeam slide (34) and a lifting cylinder (35), a crossbeam slide groove (36) is provided on the side wall of the crossbeam frame (28), a crossbeam lead screw (37) is rotatably arranged in the crossbeam slide groove (36), a crossbeam slider (38) is threadedly sleeved on the crossbeam lead screw (37), the crossbeam slider (38) is slidably adapted to the crossbeam slide groove (36), the crossbeam slide (34) is fixed on the crossbeam slider (38), a cylinder mounting plate (39) is fixed on the side wall of the crossbeam slide (34), a cylinder body of the lifting cylinder (35) is mounted on the cylinder mounting plate (39), and the telescopic shaft of the lifting cylinder (35) is fixedly connected to the correction seat (3).

5. A circuit board welding series test device with positioning correction according to claim 4, characterized in that: A mechanical limit (47) is provided on the ground rail (41). When the sliding support plate (66) abuts against the mechanical limit (47), the test bench (10) is located directly above the lifting test bench (43). A linear drive mechanism is provided on one side of the sliding support plate (66). The linear drive mechanism includes a drive base (48) and a screw rod (49). The drive base (48) is in a U-shaped configuration. The screw rod (49) is rotatably connected to the drive base (48). A drive slider (50) is threadedly sleeved on the screw rod (49). The drive slider (50) is slidably adapted to the drive base (48). A side support plate (51) is fixed to the side wall of the sliding support plate (66). The side support plate (51) is fixedly connected to the drive slider (50).

6. A circuit board welding series test device with positioning correction according to claim 5, characterized in that: One end of the screw rod (49) is slidably sleeved with a first special-shaped gear (52). A drive motor (53) is installed at one end of the drive base (48). The output shaft of the drive motor (53) is connected with a second special-shaped gear (54). A plurality of first wedge teeth (55) are fixed to the end face of the first special-shaped gear (52) close to the second special-shaped gear (54). The plurality of first wedge teeth (55) are evenly distributed along the circumferential direction of the first special-shaped gear (52). A first wedge groove is formed between adjacent two of the first wedge teeth (55). A plurality of second wedge teeth (56) are fixed to the end face of the second special-shaped gear (54) close to the first special-shaped gear (52). The plurality of second wedge teeth (56) are evenly distributed along the circumferential direction of the second special-shaped gear (54). A second wedge groove is formed between adjacent two of the second wedge teeth (56). The first wedge teeth (55) are engaged in the second wedge grooves, and the second wedge teeth (56) are engaged in the first wedge grooves. The wedge angle of the first wedge teeth (55) is different from the wedge angle of the second wedge teeth (56). A shoulder (57) is fixedly sleeved on the screw rod (49). An idle spring (58) is sleeved on the screw rod (49). Two ends of the idle spring (58) are respectively connected to the shoulder (57) and the first special-shaped gear (52).

7. A circuit board welding series test device with positioning correction according to claim 1, characterized in that: The installation cross beam (59) is provided with a track groove adapted to the slide rail (30). A test gear (63) is rotatably provided at the bottom of the installation cross beam (59). The test gear (63) meshes with the walking rack (32). A test motor is built in the installation cross beam (59). The output shaft of the test motor is connected to the test gear (63).

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