Dust-free PCB flying probe machine with precise positioning function

Abstract

The invention discloses a dust-free flying probe machine with an accurate positioning function for a PCB, and relates to the technical field of PCB detection, the flying probe machine comprises a machine body, a fixing mechanism, a top seat, a workbench and a detection mechanism, the top seat and the workbench are arranged at the upper end and the lower end of the machine body respectively, and compared with an existing flying probe machine for PCB detection, the flying probe machine is provided with a feeding assembly and a guiding assembly; the feeding assembly and the guiding assembly are matched to transport PCBs of different sizes into the fixing mechanism, it is ensured that the PCBs integrated with high-end chips can be accurately moved to the middle position of the fixing mechanism, a solid foundation is provided for the accuracy of subsequent probe testing, and in addition, the feeding assembly and the guiding assembly can also be used for conveying the PCBs of different sizes into the fixing mechanism after the PCBs are detected. According to the flying probe machine for PCB detection, a new PCB is directly transported into the fixing mechanism, so that the trouble that a new PCB to be detected is placed into the fixing mechanism after a previous detected PCB is taken out by a traditional flying probe machine for PCB detection is avoided.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of PCB detection, and particularly relates to a flying probe machine with accurate positioning function for dust-free PCB. BACKGROUND

[0002] Under the background of rapid development of modern electronic information technology, as an indispensable key component in electronic products, a printed circuit board (PCB) bears the important functions of connection and support of various electronic components, and plays a core role in consumer electronics, industrial control fields and power distribution systems of new energy equipment. Especially in precise electronic equipment equipped with high-end chips, the quality of the PCB directly determines the performance and reliability of the electronic product, and the accuracy of probe testing as a core means for detecting the performance of the PCB is closely related to the final quality control of the PCB. In the production and manufacturing process of the PCB, the flying probe machine as a high-precision PCB detection device is widely used in electronic manufacturing enterprises due to its high reliability in probe testing, and is especially suitable for complex PCB detection scenes of integrated high-end chips. However, the flying probe machine for PCB detection usually adopts manual or semi-automatic feeding and discharging, and in the actual production process, after the detection of a PCB is completed, the operator needs to manually take out the detected PCB from the fixing mechanism, and then places a new PCB to be detected in the fixing mechanism. This operation process not only consumes a lot of time and labor cost, but also due to the limitation of manual operation, it is difficult to guarantee the position accuracy of the placed PCB each time. For the key PCB in the power distribution system of new energy equipment and the high-end chip supporting PCB with extremely high precision, such errors may cause deviation in the detection result. Finally, during the detection process, sometimes operation errors, program errors and other phenomena occur, and the existing flying probe machine for PCB detection lacks effective self-protection mechanism, and the detection probe is often damaged, which not only affects the continuity of the probe testing, but also may fail to meet the detection requirements of the high-end chip PCB due to the decreased accuracy of the detection probe. SUMMARY

[0003] The application aims to provide a flying probe machine with accurate positioning function for dust-free PCB to solve the problems in the prior art.

[0004] To achieve the above object, the present application provides the following technical scheme: A flying probe machine with accurate positioning function for dust-free PCB, the flying probe machine comprises a machine body, a fixing mechanism, a top seat, a workbench and a detection mechanism, the top seat and the workbench are respectively arranged at the upper and lower ends of the machine body, the fixing mechanism is arranged between the top seat and the workbench, the fixing mechanism and the workbench are connected through a first lifting module, the detection mechanism is arranged at the side end of the fixing mechanism, the detection mechanism is connected with the workbench through a second lifting module and a first horizontal moving module, the inside of the workbench is provided with a feeding assembly and a guide assembly, the feeding assembly and the workbench are connected through a second horizontal moving module, when the present application works, different sizes of PCBs are transported into the fixing mechanism through the cooperation of the feeding assembly and the guide assembly, the fixing mechanism fixes the PCBs, after the fixing of the PCBs is completed, the detection mechanism is controlled to do lifting movement and horizontal linear movement through the second lifting module and the first horizontal moving module, so as to ensure that the detection mechanism can detect each area of the PCBs.

[0005] Further, the feeding assembly comprises a movable seat and a feeding seat, the movable seat is connected with the workbench through the second horizontal moving module, the feeding seat is movably installed on the movable seat through a lead screw assembly, the feeding seat is controlled to do lifting movement through the lead screw assembly, the feeding seat is provided with a first feeding groove and a second feeding groove, the guide assembly comprises two fixed plates, two first guide rails and two second guide rails, the two fixed plates are oppositely arranged at the two sides of the feeding seat, the two first guide rails are oppositely arranged at the two sides of the first feeding groove, the two second guide rails are oppositely arranged at the two sides of the second feeding groove, each first guide rail is connected with the fixed plate through a first telescopic cylinder, and each second guide rail is connected with the fixed plate through a second telescopic cylinder, at the initial stage of work, the worker can place the to-be-detected PCB into the first feeding groove, then the two first guide rails are driven to move close to each other through the first telescopic cylinder, so as to limit the to-be-detected PCB, then the movable seat and the feeding seat are moved to the position directly below the fixing mechanism through the second horizontal moving module, finally the feeding seat and the to-be-detected PCB are driven to rise through the lead screw assembly, so as to transport the to-be-detected PCB into the fixing mechanism, during the transportation, the position of the to-be-detected PCB is limited through the two first guide rails, so as to ensure that the to-be-detected PCB moves to the middle position of the fixing mechanism.

[0006] Further, the first feeding groove and the second feeding groove are both provided with a vacuum chuck, one of the vacuum chucks is connected with the first feeding groove through a first translation air cylinder, the other vacuum chuck is connected with the second feeding groove through a second translation air cylinder, a limiting plate is arranged in the first guide rail, the limiting plate and the first guide rail are connected through an adjusting bolt, the structure and the internal arrangement of the second guide rail are the same as those of the first guide rail, when the worker places the to-be-tested PCB board into the first feeding groove and the two first guide rails contact the side edges of the to-be-tested PCB board, the worker can open the first translation air cylinder at the side edge of the first feeding groove and twist the adjusting bolt, so that the vacuum chuck in the first feeding groove and the limiting plate in the first guide rail move, the vacuum chuck in the first feeding groove and the limiting plate in the first guide rail can limit the to-be-tested PCB board of different thicknesses, and ensure that the position of the to-be-tested PCB board does not deviate during the process of rising into the fixing mechanism, meanwhile, the vacuum chuck and the limiting plate in the fixing mechanism do not need to exert a large force when limiting the to-be-tested PCB board, so that the side wall of the to-be-tested PCB board is prevented from being damaged due to excessive clamping force.

[0007] Further, the fixing mechanism comprises an upper clamp and a lower clamp, the upper clamp is connected with the first lifting module, and the lower clamp is arranged on the workbench, the upper clamp comprises a first fixed seat and a first limiting seat, the first limiting seat is movably arranged in the first fixed seat through a first translation motor, a first fixed groove and a second fixed groove are arranged at the lower end of the first limiting seat, and first limiting assemblies are arranged in the first fixed groove and the second fixed groove, the distance between the upper clamp and the lower clamp is controlled through the first lifting module, and the to-be-tested PCB board moved into the fixing mechanism is fixed through the first limiting assembly.

[0008] Further, the lower clamp comprises a second fixing base and a second limiting seat, the second limiting seat is movably installed in the second fixing base through a second translation motor, third and fourth fixing grooves are arranged on the second limiting seat, second limiting components are arranged in the third and fourth fixing grooves, the first fixing groove is aligned with the third fixing groove, and the second fixing groove is aligned with the fourth fixing groove, in the present application, the to-be-detected PCB in the first feeding groove will pass through the fourth and second fixing grooves in the rising process, and the to-be-detected PCB is limited and fixed through the second limiting component in the fourth fixing groove and the first limiting component in the second fixing groove, when the to-be-detected PCB is fixed in the second and fourth fixing grooves, the worker can make the feeding seat move downward to the initial position through the lead screw assembly, then place the next to-be-detected PCB in the second feeding groove, and limit the to-be-detected PCB in the second feeding groove through the vacuum suction cup in the second feeding groove and the limiting plate in the second guide rail, when the detection of the PCB in the second and fourth fixing grooves is completed, the worker can make the feeding seat and the to-be-detected PCB in the second feeding groove rise through the lead screw assembly, at this time, the to-be-detected PCB in the second feeding groove will pass through the third and first fixing grooves, and the to-be-detected PCB in the second feeding groove can be fixed in the fixing mechanism through the second limiting component in the third fixing groove and the first limiting component in the first fixing groove, then the worker can close the second limiting component in the fourth fixing groove and the first limiting component in the second fixing groove, then open the vacuum suction cup in the first feeding groove, and the vacuum suction cup in the first feeding groove can fix the detected PCB, at this time, the worker can make the feeding seat and the detected PCB in the first feeding groove move downward through the lead screw assembly, when the worker takes away the detected PCB in the first feeding groove, the first and second translation motors are opened, the first and second limiting seats are synchronously moved through the first and second translation motors, until the distance between the to-be-detected PCB in the third and first fixing grooves and the detection mechanism is the rated distance, compared with the flying probe machine for PCB detection at present, the present application can directly move the new to-be-detected PCB to the fixing mechanism when the detection of the previous PCB is completed but not taken out, avoiding the trouble of taking out the previously detected PCB and then placing the new to-be-detected PCB in the fixing mechanism, through the above technical scheme, the present application effectively improves the work efficiency, and reduces the trouble of secondary positioning and calibration.

[0009] Further, the first limiting assembly comprises a first adjusting cylinder and a first limiting block, the first limiting block is arranged at the working end of the first adjusting cylinder, a first piezoelectric sheet is arranged on the end wall of the first limiting block away from the first adjusting cylinder, a first sensing block is arranged inside the end of the first limiting block away from the first adjusting cylinder, the first sensing block and the first limiting block are connected through a sensing spring, the structure of the second limiting assembly is the same as that of the first limiting assembly, when the first limiting assembly is not working, the first sensing block protrudes from the first limiting block, when the PCB to be detected moves into the first fixing groove or the second fixing groove, the first limiting block can be driven to move through the first adjusting cylinder, at this time, the first sensing block in the first limiting block will contact first, when the first limiting block continues to move, the first piezoelectric sheet on the first limiting block will contact the PCB to be detected and generate a group of electrical signals, the workers can judge whether the first limiting block contacts the PCB to be detected through the group of electrical signals, so as to conveniently and timely close the first adjusting cylinder, prevent the side end of the PCB to be detected from being damaged due to excessive clamping force, finally, when the PCB to be detected is fixed in the first fixing groove or the second fixing groove, it is subjected to the clamping force of the first limiting block and the elastic force of the sensing spring, through the above technical scheme, when the first adjusting cylinder fails, the phenomenon that the PCB to be detected is separated from the fixing mechanism due to insufficient clamping force and gravity is effectively avoided.

[0010] Further, the second lifting module is provided with two groups, the two groups of second lifting modules are movably installed on the workbench through the first horizontal moving module, a detection mechanism is arranged on each group of second lifting modules, the detection mechanism comprises a mounting seat and a detection needle, the mounting seat is arranged at the working end of the second lifting module, and the detection needle is arranged at the end of the mounting seat close to the fixing mechanism, the two groups of detection mechanisms are controlled to move up and down and horizontally through the two groups of second lifting modules and the first horizontal moving module, so that the PCB can be detected in all directions.

[0011] Further, the detection needle comprises a probe, a connecting seat and a fixing shaft, the connecting seat is provided with an expansion slot, the probe is arranged at the end of the connecting seat away from the mounting seat, one end of the fixing shaft is connected with the mounting seat, and the other end of the fixing shaft is wound with a spring and extends into the expansion slot, if the probe is hit due to the operation error of the workers, the probe will be subjected to a large force, at this time, the probe will compress the spring on the fixing shaft, so that the probe moves backward, through the above technical scheme, the phenomenon that the probe is damaged due to hitting is effectively avoided.

[0012] Further, the end of the connecting seat close to the probe is provided with a positioning groove, the upper and lower ends of the positioning groove are oppositely provided with a group of cavities, one positioning block and an electromagnet are arranged in each cavity, the end of each positioning block close to the positioning groove is arc-shaped and extends into the positioning groove, the end of the fixing shaft extending into the expansion groove is arc-shaped and in contact with the two positioning blocks, the positioning block is made of ferromagnetic material, the positioning block is attracted by the electromagnet, in the working process, the two positioning blocks can position the probe, prevent the probe from moving backward when meeting a force, and thus ensure the detection accuracy, when the force acting on the probe is greater than the resistance of the two positioning blocks to the fixing shaft, the probe can move backward freely, the resistance of the two positioning blocks to the fixing shaft can be adjusted by changing the attraction of the electromagnet to the positioning block, and thus the staff can control the force acting on the probe when the probe moves backward.

[0013] Further, the end of the fixing shaft close to the mounting seat is provided with a sliding groove on the outer wall, the end of the connecting seat close to the sliding groove is provided with a sliding block, the sliding block is matched with the sliding groove, and the connecting seat moves along the axial direction of the fixing shaft through the sliding block and the sliding groove, and rotation is avoided.

[0014] Compared with the prior art, the PCB detection flying probe machine has the advantages that: the feeding assembly and the guiding assembly are arranged, different sizes of PCBs are transported into the fixing mechanism through the cooperation of the feeding assembly and the guiding assembly, the PCB with integrated high-end chips can be accurately moved to the middle position of the fixing mechanism, a solid foundation is provided for the accuracy of subsequent probe testing, the feeding assembly and the guiding assembly can directly transport a new PCB into the fixing mechanism after the detection of the PCB is completed, the trouble that the traditional PCB detection flying probe machine takes out the detected PCB and then places a new PCB to be detected in the fixing mechanism is avoided, the working efficiency is improved, the trouble of secondary positioning and calibration is reduced, and when the probe is hit due to the operation error of the staff, the probe automatically moves backward, the phenomenon that the probe is damaged due to the hitting is avoided, the force acting on the probe when the probe moves backward is set by the staff, the resistance of the two positioning blocks to the fixing shaft can be adjusted by changing the attraction of the electromagnet to the positioning block, the two positioning blocks can position the probe, prevent the probe from moving backward when meeting a force, and thus ensure the detection accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic view of the overall structure of the application; Figure 2 It is a front view of the application; Figure 3 It is a schematic view of the position of the fixing mechanism of the application; Figure 4 Positional schematic view of the feeding assembly of the present application; Figure 5 Structural schematic view of the guiding assembly of the present application; Figure 6 Structural schematic view of the feeding assembly of the present application; Figure 7 Structural schematic view of the upper clamp of the present application; Figure 8 Internal schematic view of the upper clamp of the present application; Figure 9 Structural schematic view of the lower clamp of the present application; Figure 10 Internal structural schematic view of the lower clamp of the present application; Figure 11 Structural schematic view of the detection mechanism of the present application.

[0016] In the figure: 1, body; 2, fixing mechanism; 21, upper clamp; 211, first fixing seat; 212, first translation motor; 213, first limiting seat; 2131, first adjusting cylinder; 2132, first fixing groove; 2133, first limiting block; 21331, first sensing block; 2134, second fixing groove; 22, lower clamp; 221, second fixing seat; 222, second translation motor; 223, second limiting seat; 2232, third fixing groove; 2234, fourth fixing groove; 3, top seat; 4, workbench; 41, first lifting module; 42, second lifting module; 43, movable seat; 44, feeding seat; 441, first feeding groove; 442, second feeding groove; 443, vacuum chuck; 45, fixed plate; 46, first guide rail; 461, limiting plate; 462, adjusting bolt; 47, second guide rail; 5, detection mechanism; 51, mounting seat; 52, detection needle; 521, probe; 522, connecting seat; 5221, positioning block; 5222, electromagnet; 523, fixed shaft. DETAILED DESCRIPTION

[0017] All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without making creative efforts fall within the scope of protection of the present application.

[0018] Embodiment: as Figures 1-11As shown, the present application provides a technical scheme, a flying probe machine with accurate positioning function for dust-free PCB, the flying probe machine includes a body 1, a fixing mechanism 2, a top seat 3, a workbench 4 and a detection mechanism 5, the top seat 3 and the workbench 4 are respectively arranged at the upper and lower ends of the body 1, the fixing mechanism 2 is arranged between the top seat 3 and the workbench 4, the fixing mechanism 2 is connected with the workbench 4 through a first lifting module 41, the detection mechanism 5 is arranged at the side end of the fixing mechanism 2, the detection mechanism 5 is connected with the workbench 4 through a second lifting module 42 and a first horizontal moving module, the inside of the workbench 4 is provided with a feeding assembly and a guide assembly, the feeding assembly is connected with the workbench 4 through a second horizontal moving module, when the present application works, different sizes of PCBs are transported into the fixing mechanism 2 through the cooperation of the feeding assembly and the guide assembly, the PCBs are fixed through the fixing mechanism 2, after the fixing of the PCBs is completed, the detection mechanism 5 is controlled to do lifting movement and horizontal linear movement through the second lifting module 42 and the first horizontal moving module, so as to ensure that the detection mechanism 5 can detect each area of the PCBs.

[0019] As shown, Figures 2-6 The feeding assembly includes a movable seat 43 and a feeding seat 44, the movable seat 43 is connected with the workbench 4 through the second horizontal moving module, the feeding seat 44 is movably installed on the movable seat 43 through a lead screw assembly, the feeding seat 44 is controlled to do lifting movement through the lead screw assembly, the feeding seat 44 is provided with a first feeding groove 441 and a second feeding groove 442, the guide assembly includes two fixed plates 45, two first guide rails 46 and two second guide rails 47, the two fixed plates 45 are oppositely arranged at the two sides of the feeding seat 44, the two first guide rails 46 are oppositely arranged at the two sides of the first feeding groove 441, the two second guide rails 47 are oppositely arranged at the two sides of the second feeding groove 442, each first guide rail 46 is connected with the fixed plate 45 through a first telescopic cylinder, each second guide rail 47 is connected with the fixed plate 45 through a second telescopic cylinder, at the initial stage of the work of the present application, the workers can place the to-be-detected PCBs into the first feeding groove 441, then drive the two first guide rails 46 to move close to each other through the first telescopic cylinder, so as to limit the to-be-detected PCBs, then move the movable seat 43 and the feeding seat 44 to the position directly below the fixing mechanism 2 through the second horizontal moving module, finally drive the feeding seat 44 and the to-be-detected PCBs to rise through the lead screw assembly, so as to transport the to-be-detected PCBs into the fixing mechanism 2, during the transportation, the positions of the to-be-detected PCBs are limited through the two first guide rails 46, so as to ensure that the to-be-detected PCBs move to the middle position of the fixing mechanism 2.

[0020] As shown, Figures 3-6As shown, a vacuum chuck 443 is arranged in each of the first feeding groove 441 and the second feeding groove 442, one of the vacuum chucks 443 is connected with the first feeding groove 441 through a first translation air cylinder, and the other vacuum chuck 443 is connected with the second feeding groove 442 through a second translation air cylinder, a limiting plate 461 is arranged in the first guide rail 46, and the limiting plate 461 and the first guide rail 46 are connected through an adjusting bolt 462, the structure and the internal arrangement of the second guide rail 47 are same as those of the first guide rail 46, when the worker places the to-be-detected PCB board into the first feeding groove 441 and the two first guide rails 46 contact the side edges of the to-be-detected PCB board, the worker can open the first translation air cylinder at the side of the first feeding groove 441, and rotate the adjusting bolt 462, so that the vacuum chuck 443 in the first feeding groove 441 and the limiting plate 461 in the first guide rail 46 are moved, the vacuum chuck 443 in the first feeding groove 441 and the limiting plate 461 in the first guide rail 46 can limit the to-be-detected PCB board of different thicknesses, and ensure that the position of the to-be-detected PCB board does not deviate during rising into the fixing mechanism 2, and meanwhile, the vacuum chuck 443 and the limiting plate 461 in the fixing mechanism 2 do not need to exert a large force when limiting the to-be-detected PCB board, so that the side wall of the to-be-detected PCB board is prevented from being damaged due to excessive clamping force.

[0021] As shown in Figures 4-10 The fixing mechanism 2 includes an upper clamp 21 and a lower clamp 22, the upper clamp 21 is connected with the first lifting module 41, and the lower clamp 22 is arranged on the workbench 4, the upper clamp 21 includes a first fixed seat 211 and a first limiting seat 213, the first limiting seat 213 is movably installed in the first fixed seat 211 through a first translation motor 212, a first fixed groove 2132 and a second fixed groove 2134 are arranged at the lower end of the first limiting seat 213, and a first limiting assembly is arranged in each of the first fixed groove 2132 and the second fixed groove 2134, the distance between the upper clamp 21 and the lower clamp 22 is controlled through the first lifting module 41, and the to-be-detected PCB board moved into the fixing mechanism 2 is limited and fixed through the first limiting assembly.

[0022] As shown in Figures 4-10As shown, the lower clamp 22 comprises a second fixed seat 221 and a second limiting seat 223, the second limiting seat 223 is movably installed in the second fixed seat 221 through a second translation motor 222, a third fixed groove 2232 and a fourth fixed groove 2234 are arranged on the second limiting seat 223, and a second limiting assembly is arranged in each of the third fixed groove 2232 and the fourth fixed groove 2234; the first fixed groove 2132 is aligned with the third fixed groove 2232, and the second fixed groove 2134 is aligned with the fourth fixed groove 2234; in the present application, the to-be-detected PCB board in the first feeding groove 441 will pass through the fourth fixed groove 2234 and the second fixed groove 2134 during the rising process, and the to-be-detected PCB board is limited and fixed by the second limiting assembly in the fourth fixed groove 2234 and the first limiting assembly in the second fixed groove 2134; after the to-be-detected PCB board is fixed in the second fixed groove 2134 and the fourth fixed groove 2234, the worker can make the feeding seat 44 move downward to the initial position through the lead screw assembly, and then place the next to-be-detected PCB board into the second feeding groove 442; the to-be-detected PCB board in the second feeding groove 442 is limited by the vacuum suction cup 443 in the second feeding groove 442 and the limiting plate 461 in the second guide rail 47; when the detection of the PCB board in the second fixed groove 2134 and the fourth fixed groove 2234 is completed, the worker can make the feeding seat 44 and the to-be-detected PCB board in the second feeding groove 442 rise, at this time, the to-be-detected PCB board in the second feeding groove 442 will pass through the third fixed groove 2232 and the first fixed groove 2132, and the to-be-detected PCB board in the second feeding groove 442 is fixed in the fixing mechanism 2 by the second limiting assembly in the third fixed groove 2232 and the first limiting assembly in the first fixed groove 2132; then the worker can close the second limiting assembly in the fourth fixed groove 2234 and the first limiting assembly in the second fixed groove 2134, and then open the vacuum suction cup 443 in the first feeding groove 441, so that the detected PCB board can be fixed by the vacuum suction cup 443 in the first feeding groove 441; at this time, the worker can make the feeding seat 44 and the detected PCB board in the first feeding groove 441 move downward through the lead screw assembly; when the worker takes away the detected PCB board in the first feeding groove 441, the first translation motor 212 and the second translation motor 222 are opened, and the first limiting seat 213 and the second limiting seat 223 are synchronously moved by the first translation motor 212 and the second translation motor 222 until the distance between the to-be-detected PCB board in the third fixed groove 2232 and the first fixed groove 2132 and the detection mechanism 5 is the rated distance; compared with the current PCB detection flying probe machine, the present application can directly move the new to-be-detected PCB board into the fixing mechanism 2 when the detection of the previous PCB board is completed but not taken out, avoiding the trouble of taking out the previously detected PCB board and then placing the new to-be-detected PCB board into the fixing mechanism 2,Through the technical scheme, work efficiency is effectively improved, and the trouble of secondary positioning and calibration is reduced.

[0023] As Figures 7-10 shown, the first limiting assembly includes a first adjusting cylinder 2131 and a first limiting block 2133, the first limiting block 2133 is arranged at the working end of the first adjusting cylinder 2131, a first piezoelectric sheet is arranged on the end wall surface of the first limiting block 2133 away from the first adjusting cylinder 2131, a first sensing block 21331 is arranged inside the end of the first limiting block 2133 away from the first adjusting cylinder 2131, the first sensing block 21331 and the first limiting block 2133 are connected through a sensing spring, the structure of the second limiting assembly is the same as that of the first limiting assembly, when the first limiting assembly is not working, the first sensing block 21331 protrudes from the first limiting block 2133, when the PCB to be detected moves into the first fixed groove 2132 or the second fixed groove 2134, the first limiting block 2133 can be driven to move through the first adjusting cylinder 2131, at this time, the first sensing block 21331 in the first limiting block 2133 will contact first, when the first limiting block 2133 continuously moves, the first piezoelectric sheet on the first limiting block 2133 will contact the PCB to be detected and generate a group of electrical signals, the workers can judge whether the first limiting block 2133 contacts the PCB to be detected through the group of electrical signals, so as to conveniently and timely close the first adjusting cylinder 2131, and prevent the side end of the PCB to be detected from being damaged due to excessive clamping force, finally, when the PCB to be detected is fixed in the first fixed groove 2132 or the second fixed groove 2134, the PCB to be detected is subjected to the clamping force of the first limiting block 2133 and the elastic force of the sensing spring, through the above technical scheme, when the first adjusting cylinder 2131 fails, the phenomenon that the PCB to be detected is separated from the fixing mechanism 2 due to insufficient clamping force and gravity is effectively avoided.

[0024] As Figure 2 , Figure 11 shown, the second lifting module 42 is provided with two groups, the two groups of second lifting modules 42 are movably installed on the workbench 4 through the first horizontal moving module, one group of detection mechanisms 5 is arranged on each second lifting module 42, the detection mechanism 5 includes a mounting seat 51 and a detection needle 52, the mounting seat 51 is arranged at the working end of the second lifting module 42, and the detection needle 52 is arranged at the end of the mounting seat 51 close to the fixing mechanism 2, the two groups of detection mechanisms 5 are controlled to ascend and descend and horizontally move through the two groups of second lifting modules 42 and the first horizontal moving module, and then the PCB can be comprehensively detected.

[0025] As Figure 11As shown, the detection needle 52 comprises a probe 521, a connecting seat 522 and a fixing shaft 523, the connecting seat 522 is internally provided with an expansion slot, the probe 521 is arranged at one end of the connecting seat 522 away from the mounting seat 51, one end of the fixing shaft 523 is connected with the mounting seat 51, the other end of the fixing shaft 523 is wound with a spring and extends into the expansion slot, if the probe 521 is caused to collide due to the operation error of the staff, the probe 521 will be subjected to a greater force, at this time, the probe 521 will compress the spring on the fixing shaft 523, so that the probe 521 moves backward, through the above technical scheme, the present application effectively avoids the phenomenon that the probe 521 is damaged due to collision.

[0026] As shown in the figure, Figure 11 The inner wall of one end of the fixing shaft 523 close to the mounting seat 51 is provided with a sliding groove, one end of the connecting seat 522 close to the sliding groove is provided with a sliding block, the sliding block is matched with the sliding groove, the sliding block and the sliding groove ensure that the connecting seat 522 moves along the axial direction of the fixing shaft 523, and the rotating movement is not caused.

[0027] As shown in the figure, Figure 11 The inner wall of one end of the fixing shaft 523 close to the mounting seat 51 is provided with a sliding groove, one end of the connecting seat 522 close to the sliding groove is provided with a sliding block, the sliding block is matched with the sliding groove, the sliding block and the sliding groove ensure that the connecting seat 522 moves along the axial direction of the fixing shaft 523, and the rotating movement is not caused.

[0028] The working principle of the present application: in the initial stage of work, the workers can place the PCB to be detected into the first feeding groove 441, and then drive the two first guide rails 46 to approach each other through the first telescopic cylinder, so as to limit the PCB to be detected, then move the movable seat 43 and the feeding seat 44 to the fixed mechanism 2 below through the second horizontal moving module, and finally drive the feeding seat 44 and the PCB to be detected to rise through the lead screw assembly, so as to transport the PCB to be detected into the fixed mechanism 2. In the process of transportation, the position of the PCB to be detected is limited by the two first guide rails 46, and when the PCB to be detected is fixed into the second fixed groove 2134 and the fourth fixed groove 2234, the workers can make the feeding seat 44 move down to the initial position through the lead screw assembly, and then place the next PCB to be detected into the second feeding groove 442. The detection mechanism 5 is controlled to make lifting and horizontal linear motion through the second lifting module 42 and the first horizontal moving module, so as to ensure that the detection mechanism 5 can detect each area of the PCB to be detected in the fixed mechanism 2. At the same time of detecting the PCB, the PCB to be detected in the second feeding groove 442 is limited by the vacuum chuck 443 in the second feeding groove 442 and the limiting plate 461 in the second guide rail 47. When the detection of the PCB in the second fixed groove 2134 and the fourth fixed groove 2234 is completed, the workers can make the feeding seat 44 and the PCB to be detected in the second feeding groove 442 rise through the lead screw assembly, and the second limiting assembly in the third fixed groove 2232 and the first limiting assembly in the first fixed groove 2132 can fix the PCB to be detected in the second feeding groove 442 into the fixed mechanism 2. Then the workers can close the second limiting assembly in the fourth fixed groove 2234 and the first limiting assembly in the second fixed groove 2134, and then open the vacuum chuck 443 in the first feeding groove 441. The vacuum chuck 443 in the first feeding groove 441 can fix the detected PCB, and the feeding seat 44 and the detected PCB in the first feeding groove 441 are moved down through the lead screw assembly. Then the first translation motor 212 and the second translation motor 222 are opened, and the first limiting seat 213 and the second limiting seat 223 are moved synchronously through the first translation motor 212 and the second translation motor 222, until the distance between the PCB to be detected in the third fixed groove 2232 and the first fixed groove 2132 and the detection mechanism 5 is the rated distance.

[0029] Finally, it should be noted that the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that the technical solutions described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalent ones. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A dust-free PCB flying probe machine with precise positioning function, characterized in that: The flying needle machine includes a body (1), a fixing mechanism (2), a top seat (3), a worktable (4), and a detection mechanism (5). The top seat (3) and the worktable (4) are respectively located at the upper and lower ends of the body (1). The fixing mechanism (2) is located between the top seat (3) and the worktable (4). The detection mechanism (5) is located at the side end of the fixing mechanism (2). The worktable (4) is equipped with a feeding component and a guiding component. Through the cooperation of the feeding component and the guiding component, PCB boards of different sizes are transported into the fixing mechanism (2).

2. The fly probe machine for PCBs with precise positioning function according to claim 1, characterized in that: The feeding assembly includes a movable seat (43) and a feeding seat (44). The feeding seat (44) is movably mounted on the movable seat (43) via a screw assembly. The feeding seat (44) is provided with a first feeding groove (441) and a second feeding groove (442). The guiding assembly includes two fixed plates (45), two first guide rails (46), and two second guide rails (47). The two fixed plates (45) are arranged opposite to each other on both sides of the feeding seat (44). The two first guide rails (46) are arranged opposite to each other on both sides of the first feeding groove (441). The two second guide rails (47) are arranged opposite to each other on both sides of the second feeding groove (442). Each first guide rail (46) is connected to the fixed plate (45) via a first telescopic cylinder. Each second guide rail (47) is connected to the fixed plate (45) via a second telescopic cylinder.

3. A dust-free PCB flying probe machine with precise positioning function according to claim 2, characterized in that: A vacuum suction cup (443) is provided in both the first feeding trough (441) and the second feeding trough (442). One of the vacuum suction cups (443) is connected to the first feeding trough (441) through a first translation cylinder, and the other vacuum suction cup (443) is connected to the second feeding trough (442) through a second translation cylinder. A limit plate (461) is provided in the first guide rail (46). The limit plate (461) is connected to the first guide rail (46) through an adjusting bolt (462). The structure and internal configuration of the second guide rail (47) are the same as those of the first guide rail (46).

4. A dust-free PCB flying probe machine with precise positioning function according to claim 1, characterized in that: The fixing mechanism (2) includes an upper clamp (21) and a lower clamp (22). The upper clamp (21) is connected to the worktable (4) through a first lifting module (41). The lower clamp (22) is set on the worktable (4). The upper clamp (21) includes a first fixed seat (211) and a first limiting seat (213). The first limiting seat (213) is movably installed in the first fixed seat (211) through a first translation motor (212). The lower end of the first limiting seat (213) is provided with a first fixing groove (2132) and a second fixing groove (2134). A first limiting component is provided in both the first fixing groove (2132) and the second fixing groove (2134).

5. A dust-free PCB flying probe machine with precise positioning function according to claim 4, characterized in that: The lower clamp (22) includes a second fixed seat (221) and a second limiting seat (223). The second limiting seat (223) is movably installed in the second fixed seat (221) by a second translation motor (222). The second limiting seat (223) is provided with a third fixing groove (2232) and a fourth fixing groove (2234). A second limiting component is provided in both the third fixing groove (2232) and the fourth fixing groove (2234).

6. A dust-free PCB flying probe machine with precise positioning function according to claim 5, characterized in that: The first limiting component includes a first adjusting cylinder (2131) and a first limiting block (2133). The first limiting block (2133) is disposed at the working end of the first adjusting cylinder (2131). A first piezoelectric sheet is disposed on the wall surface of the first limiting block (2133) away from the first adjusting cylinder (2131). A first sensing block (21331) is disposed inside the end of the first limiting block (2133) away from the first adjusting cylinder (2131). The first sensing block (21331) and the first limiting block (2133) are connected by a sensing spring. The structure of the second limiting component is the same as that of the first limiting component.

7. A dust-free PCB flying probe machine with precise positioning function according to claim 1, characterized in that: Two sets of second lifting modules (42) are provided on the workbench (4). Both sets of second lifting modules (42) are movably installed on the workbench (4) through the first horizontal moving module. Each set of second lifting modules (42) is provided with a detection mechanism (5). The detection mechanism (5) includes a mounting base (51) and a detection needle (52). The mounting base (51) is located at the working end of the second lifting module (42), and the detection needle (52) is located at the end of the mounting base (51) near the fixing mechanism (2).

8. A dust-free PCB flying probe machine with precise positioning function according to claim 7, characterized in that: The detection needle (52) includes a probe (521), a connecting seat (522), and a fixed shaft (523). The connecting seat (522) has a telescopic groove. The probe (521) is located at the end of the connecting seat (522) away from the mounting seat (51). One end of the fixed shaft (523) is connected to the mounting seat (51), and the other end of the fixed shaft (523) is wound with a spring and extends into the telescopic groove.

9. A dust-free PCB flying probe machine with precise positioning function according to claim 8, characterized in that: The connecting seat (522) has a positioning groove at one end near the probe (521). The upper and lower ends of the positioning groove are provided with a set of cavities. Each set of cavities is provided with a positioning block (5221) and an electromagnet (5222). The end of each positioning block (5221) near the positioning groove is an arc-shaped structure and extends into the positioning groove. The end of the fixed shaft (523) that extends into the telescopic groove is an arc-shaped structure and contacts the two positioning blocks (5221).

10. A dust-free PCB flying probe machine with precise positioning function according to claim 9, characterized in that: The fixed shaft (523) has a groove on the outer wall of one end near the mounting base (51), and the connecting base (522) has a slider at one end near the groove, the slider cooperating with the groove.

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