CN115739705A - Full-automatic circuit board test equipment - Google Patents
Full-automatic circuit board test equipment Download PDFInfo
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- CN115739705A CN115739705A CN202211446704.2A CN202211446704A CN115739705A CN 115739705 A CN115739705 A CN 115739705A CN 202211446704 A CN202211446704 A CN 202211446704A CN 115739705 A CN115739705 A CN 115739705A
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Abstract
The invention relates to the technical field of circuit board test equipment, in particular to full-automatic circuit board test equipment, which comprises a bracket, a probe, a mold box, a top cover, a power unit, an auxiliary unit, a transmission unit and a control unit, wherein the probe is arranged on the bracket; the bottom of the bracket is fixedly provided with a mould box; the top of the bracket is fixedly provided with an auxiliary unit; a transmission unit is movably arranged above the auxiliary unit; the probe is fixedly arranged on the power unit; the power unit is fixedly arranged in the model; the top cover is movably arranged right above the mould box; the power unit and the transmission unit are electrically connected with the control unit; the invention can detect circuit boards with different sizes and holes with different sizes on the circuit board, and can detect electronic components on the circuit board, and the probe can realize the decompression function by itself during detection, thereby preventing the circuit board from being damaged by the probe, and the probe can detect the conductivity by itself, thereby improving the working efficiency and saving the manufacturing cost.
Description
Technical Field
The invention relates to the technical field of circuit board testing equipment, in particular to full-automatic circuit board testing equipment.
Background
With the rapid development of the society, electronic products have spread over the lives of people, and the electronic products are visible everywhere no matter in life or in work, so that the working mode of people is changed, and the living level of people is also improved.
In the traditional circuit board testing process, basically, each circuit on the circuit board is tested manually, so that the time and labor are wasted, and the conditions of test omission or repeated tests and the like can occur, so that the efficiency is low, the quality cannot be ensured, and the prior art discloses a circuit board tester, for example, the Chinese invention patent: CN103777042A (published as: 2014-05-07) discloses an ascending type circuit board tester, which comprises a testing box body, wherein the testing box body comprises a bottom plate, a top plate and side plates arranged between the bottom plate and the top plate, a fixed plate, an ejector plate, a handle, a horizontal moving plate and a vertical moving plate, the ejector plate and the fixed plate are sequentially arranged between the two side plates from top to bottom, an opening is formed in the fixed plate, the vertical fixed plate penetrates through the opening to be connected with the bottom surface of the ejector plate, a probe is arranged on the ejector plate, the handle is arranged below the fixed plate, the horizontal rod of the handle is provided with the horizontal moving plate, an inclined groove is formed in the vertical moving plate, a roller on the side surface of the horizontal moving plate is arranged in the inclined groove and can slide along the inclined groove.
After the circuit board is tested to be qualified, various electronic components can be installed on the circuit board, after the electronic components are installed, various different components on the circuit board need to be tested to ensure that various different electronic components can work normally, and for the test of the electronic components on the circuit board, some solutions are provided in the prior art, for example, the invention patent in China: CN107255783B (published 2020-02-18) discloses a flying probe testing device, which comprises a supporting base, an X-direction unit, a Y-direction unit and a probe loading unit; the X-direction unit and the Y-direction unit are arranged on the supporting base, and the probe loading unit is arranged on the Y-direction unit; the supporting base comprises a rear supporting base and a front supporting base, and is fixed on the flying probe testing platform in parallel; the rear rail pair is arranged on the rear support base, the front rail pair is arranged on the front support base, and the plurality of X-direction units are arranged on the support base; y is to backup pad setting on the unit on the track pair on supporting the base, the device has solved the artifical test to electronic components on the circuit board of tradition, work efficiency has been improved, and fly needle positioning accuracy, but the device is when testing electronic components's soldering tin position on the circuit board, when contacting the soldering tin position through flying the high-speed motion of needle, cause the soldering tin position to damage easily, lead to electronic components non-conductive, or cause the soldering tin position little pit to appear, lead to product appearance defect, and when flying the needle test, need carry out the test one by one to a plurality of soldering tins.
With the development of science and technology, great leaps are taking place on the test of circuit board products, and the test gradually develops from the traditional manual test to the automatic mechanical test, such as Chinese invention patent: CN110031750A (published as 2019-07-19) discloses a full-automatic circuit board testing device, which comprises a testing module, a feeding module and a discharging module; the test module comprises a test box and a pressing plate, a test component is arranged in the test box, a test area is arranged on the top surface of the test box, a test terminal of the test component extends in the test area, the pressing plate is used for pressing and fixing a product to be tested to be electrically connected with the test terminal, the feeding module comprises a feeding manipulator and a first supporting platform used for placing a first material disc, the product to be tested is arranged in the first material disc, the discharging module comprises a discharging manipulator and a second supporting platform used for placing a second material disc, the tested product is arranged in the second material disc, the device realizes mechanical automatic test, the electrical terminal on the circuit board is electrically connected with the test terminal on the test box by pressing the pressing plate, so that the circuit board can be tested, the test efficiency is improved, but the device can only test the circuit board of the same type and cannot be suitable for circuit boards of different types and sizes.
In view of the above, the present invention provides a fully automatic circuit board testing device based on the improvement and optimization of the existing fully automatic circuit board testing device.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the invention provides a full-automatic circuit board testing device, which not only can detect circuit boards with different sizes, but also can detect holes with different sizes on the circuit boards, and can detect electronic components on the circuit boards, wherein a probe can realize a pressure reduction effect by itself when detecting the electronic components, so that the circuit boards are prevented from being damaged by the probe, and the probe can realize self-conductivity detection.
The invention provides the following technical scheme: a full-automatic circuit board testing device comprises a support, a probe, a mold box, a top cover, a power unit, an auxiliary unit, a transmission unit and a control unit; the bottom of the bracket is fixedly provided with a mould box; the top of the bracket is fixedly provided with an auxiliary unit; the auxiliary unit is used for assisting in clamping circuit boards of different sizes; a transmission unit is movably arranged above the auxiliary unit; the transmission unit is used for conveying the circuit board; the probe is fixedly arranged on the power unit; the power unit is used for controlling the extension and retraction of the probe; the probe is used for detecting the circuit board; the power unit is fixedly arranged in the model; the top cover is movably arranged right above the mould box; the top cover is used for detecting whether the probe is conductive or not; the control unit is used for controlling the power unit and the transmission unit; the power unit and the transmission unit are electrically connected with the control unit.
Preferably, the probe comprises a conical probe head, an elastic cylinder, a conducting ring, a hollow needle body and a string; the top of the hollow needle body is fixedly arranged with the bottom of the elastic cylinder; the concrete installation mode adopts Yihe YH-395 glue for glue joint; the elastic cylinder is a hollow cylinder; the top of the elastic cylinder is fixedly provided with a conical probe; the specific installation mode adopts Yihe YH-395 glue for glue joint; an annular groove is formed below the top of the outer surface of the hollow needle body; a conducting ring is fixedly arranged in the annular groove on the outer surface of the hollow needle body; the inner diameter of the conducting ring is slightly smaller than the diameter of the annular groove on the outer surface of the hollow needle body; the specific installation mode adopts clamping installation; one end of the thin rope is fixedly connected to the bottom of the conical probe; the concrete connection mode adopts Yihe YH-395 glue for glue joint; the diameter of the probe is slightly smaller than that of the hole on the circuit board; the diameter of the hole on the circuit board is determined according to the thickness of the board; the maximum deformation diameter of the elastic cylinder is larger than the maximum diameter of the hole in the circuit board; the conical probe is used for detecting whether each component on the circuit board is damaged; the elastic cylinder is used for detecting the open circuit and short circuit conditions of the hole on the circuit board; the conducting ring is used for communicating with the probe, so that current can pass through the probe; the string is used to control the shape of the elastic cylinder.
Preferably, the interior of the mould box is of a hollow structure; a plurality of stepped holes are formed in the top of the mold box in an array manner; a conductive circular ring is fixedly arranged on the inner wall of the upper part of the stepped hole; the outer diameter of the conductive circular ring is slightly larger than the diameter of the upper part of the stepped hole; the specific installation mode adopts clamping installation; the inner diameter of the conductive circular ring is the same as the inner diameter of the lower part of the stepped hole, and a probe is arranged in the stepped hole in a sliding manner; a conductive circular ring is fixedly arranged on the inner wall of the upper part of the stepped hole and used for electrifying the probe; and a wire is fixedly arranged in the top of the mold box, and the conductive ring is fixedly connected with the wire.
Preferably, a plurality of metal wafers are fixedly arranged at the bottom of the top cover in an array manner; the metal disc is installed in a specific mode that the metal disc is welded at the bottom of the top cover; the metal wafers correspond to the probes on the mould box one by one; the diameter of the metal wafer is smaller than the radial diameter of the probe; the metal discs on the top cover correspond to the probes on the mould box one by one so as to detect the conductivity of the probes.
Preferably, the power unit comprises an electric push rod, a cylindrical sleeve and an electric telescopic rod; the plurality of electric push rods are arranged in an array and fixedly installed at the bottom of the mold box; the plurality of cylindrical sleeves are fixedly arranged at the top of the electric push rod; the plurality of electric telescopic rods are fixedly arranged inside the cylindrical sleeve; the tops of the electric telescopic rods are fixedly connected with the other end of the thin rope; the concrete connection mode adopts Yihe YH-395 glue for glue joint; the electric push rod is used for controlling the extension of the probe, the conical probe at the top of the probe is in mutual contact with soldering tin points on the circuit board, and the periphery of the outer side of the elastic cylinder is in mutual contact with holes in the circuit board.
Preferably, the auxiliary unit comprises a connecting frame, a lead screw and a ball sleeve; the connecting frame is of a cuboid structure; and rectangular lugs are respectively arranged at two ends of the top of the connecting frame; the bottom of the connecting frame is fixedly arranged on the bracket; two ends of the screw rod are fixedly arranged at the central positions of the rectangular lugs at two ends of the connecting frame; a ball sleeve is slidably mounted on the lead screw; the ball sleeve is adopted to reduce friction, so that the moving distance of the ball sleeve on the screw is accurate; and a gear is arranged on the outer surface of the ball sleeve; the outer surface of the ball sleeve is provided with a gear so that the transmission unit can control the gear to rotate.
Preferably, the transmission unit comprises a rectangular frame, a turntable, a servo motor, a rotating wheel and a belt; rectangular grooves are respectively formed in the upper parts of one side surfaces of the two rectangular frames; a plurality of round holes are respectively formed in the lower parts of the same side faces of the two rectangular frames; the plurality of round holes are adjacent to each other in pairs in the middle of the rectangular frame, and only two round holes are formed in two ends of the rectangular frame respectively and form a certain distance; the lower parts of the two rectangular frames are of hollow structures; two ends of the bottom of each rectangular frame are symmetrically provided with a rectangular box respectively; the distance between the two rectangular boxes is greater than the side length of the mould box; the distance between the rectangular boxes is larger than the side length of the die box, so that the two rectangular boxes can be fixedly installed with the ball sleeve on the auxiliary unit screw; a rotating motor is fixedly arranged in the rectangular box; a gear is fixedly arranged on the rotating motor; the rotating motor is used for controlling the rectangular frame to move on the lead screw; outward bulges are arranged at the top ends of the side edges of the plurality of the turntables; the top end of the side edge of the turntable is provided with an outward bulge for clamping the circuit board; the plurality of turntables are rotatably arranged in the rectangular grooves on the side surfaces of the rectangular frames; the servo motors are respectively and fixedly arranged in the lower part of the rectangular frame, and rotating shafts of the servo motors are respectively and rotatably arranged with the round holes; the rotating wheels are fixedly arranged on rotating shafts of the servo motors respectively; two rotating wheels on the side surfaces of two ends of the two rectangular frames are respectively and rotatably provided with a belt; the belt is made of rubber; the belt is used for transporting the circuit board through the rotation of runner, also can adjust the position of circuit board when runner transportation circuit board.
Preferably, a visual sensor is fixedly mounted at the bottom of the top cover; the vision sensor is electrically connected with the control unit; the vision sensor is used for detecting the position of the circuit board and the position of the hole on the circuit board, detecting the position above the circuit board through the vision sensor, or detecting the soldering tin position of each electronic component on the circuit board.
Preferably, a displacement sensor is fixedly mounted on the auxiliary unit; the displacement sensor is electrically connected with the control unit; the displacement sensor is used for detecting the moving distance of the transmission unit.
Preferably, a layer of copper film is plated on the outer surfaces of the conical probe and the elastic cylinder at the top of the probe respectively; the conical probe at the top of the probe and the outer surface of the elastic cylinder are plated with copper, so that the probe can be electrified when a circuit board is detected, the short circuit and open circuit conditions of each hole on the circuit board can be detected through the conical probe and the elastic cylinder, and whether electronic components on the circuit board are damaged or not can be detected.
The invention has the following beneficial effects:
1. according to the invention, the electric push rod is fixedly arranged at the bottom of the mould box, the top of the electric push rod is fixedly arranged with the bottom of the cylindrical sleeve, the electric telescopic rod is fixedly arranged in the cylindrical sleeve, the probe is fixedly arranged at the top of the cylindrical sleeve and comprises a conical probe, an elastic cylinder, a conducting ring, a hollow needle body and a thin rope, and the top of the hollow needle body is fixedly arranged with the bottom of the elastic cylinder; the top of the elastic cylinder is fixedly provided with a conical probe; an annular groove is formed below the top of the outer surface of the hollow needle body; a conducting ring is fixedly arranged in the annular groove on the outer surface of the hollow needle body; string one end fixed connection is in the toper probe bottom, and string other end fixed connection is at the electric telescopic handle top, has realized promptly can whether damage through each electronic components on the probe top toper probe detection circuitry board, realizes the decompression through elasticity cylinder simultaneously, has prevented that the soldering tin department of toper probe on to the circuit board from causing the damage, also can detect the hole of equidimension not on the circuit board through elasticity cylinder, need not change the probe, has improved the efficiency that detects.
2. According to the invention, the transmission unit is movably arranged above the auxiliary unit, the visual sensor is fixedly arranged at the bottom of the top cover, the displacement sensors are respectively and fixedly arranged on the auxiliary unit and the transmission unit, and the distance between the rectangular frames on the transmission unit is adjusted through the lead screw on the auxiliary unit, so that circuit boards with different sizes can be detected through visual transmission, the distance between the rectangular frames can be adjusted, the positions of holes in the circuit boards and the soldering positions of electronic components can also be detected through the visual sensor, and therefore, the control unit controls the micro-movement of the transmission unit on the auxiliary unit and the micro-movement of the circuit boards on the transmission unit, the holes and the soldering positions are respectively in one-to-one correspondence with the probes, the circuit boards are prevented from being damaged due to the fact that the holes and the soldering positions are not in correspondence with the probes, meanwhile, the visual detection device is suitable for circuit boards with various sizes, the manufacturing cost is saved, and the working efficiency is improved.
3. According to the invention, the plurality of metal wafers are fixedly arranged at the bottom of the top cover in an array mode, and the metal wafers correspond to the probes on the mold box one by one, so that the probes are automatically detected, the top conductivity of the probes is possibly poor and damaged in the long-time use process, the metal wafers at the bottom of the top cover are contacted with the probes, so that the conductivity of the probes is detected, the probes which are unqualified in detection can be displayed on a computer screen, the disassembly and the assembly are convenient, and the circuit board detection errors caused by overlong use time and incapability of observation by naked eyes are prevented.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a schematic perspective view of the cap-free structure of the present invention.
Fig. 3 is a front view of fig. 2.
Fig. 4 is a top view of fig. 2.
Fig. 5 is a left side view of fig. 2.
Fig. 6 is a schematic perspective view of the electric push rod and the probe according to the present invention.
Fig. 7 is a schematic perspective view of the transmission unit of the present invention.
Fig. 8 is a partial sectional view of a servo motor inside a rectangular frame according to the present invention.
Fig. 9 is a partial sectional view of the rotating electric machine in the rectangular box of the present invention.
FIG. 10 is a cross-sectional view of the stepped bore of the top of the mold box of the present invention.
FIG. 11 is a partial cross-sectional view of a probe of the present invention.
Fig. 12 is a bottom view of the top cover of the present invention.
Fig. 13 is a partial cross-sectional view of the elastic cylinder deformation of the present invention.
In the figure: the device comprises a support 1, a probe 2, a conical probe 21, an elastic cylinder 22, a conductive ring 23, a hollow needle body 24, a string 25, an annular groove 26, a mold box 3, a stepped hole 31, a conductive ring 32, a top cover 4, a metal wafer 41, a power unit 5, an electric push rod 51, a cylindrical sleeve 52, an electric telescopic rod 53, an auxiliary unit 6, a connecting frame 61, a lead screw 62, a ball sleeve 63, a rectangular lug 64, a transmission unit 7, a rectangular frame 71, a rotary disc 72, a servo motor 73, a rotating motor 74, a rotating wheel 75, a belt 76, a rectangular groove 77 and a rectangular box 78.
Detailed Description
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
The first embodiment is as follows: as shown in fig. 11, the first embodiment is used for detecting a circuit board on which electronic components are soldered; the probe 2 is pushed by an electric push rod 51; the probe 2 is lifted for a certain distance; the conical probe 21 at the top of the probe 2 is contacted with a soldering tin position on the circuit board; the probe 2 is electrified to detect electronic components on the circuit board, and when the conical probe 21 is in contact with the soldering tin position, the elastic cylinder 22 is deformed when being axially stressed by a certain pressure, so that the decompression effect is realized, and the soldering tin position is prevented from being damaged.
As shown in fig. 1 and 6, a full-automatic circuit board testing device comprises a support 1, a probe 2, a mold box 3, a top cover 4, a power unit 5, an auxiliary unit 6, a transmission unit 7 and a control unit; the bottom of the bracket 1 is fixedly provided with a mould box 3; an auxiliary unit 6 is fixedly arranged at the top of the bracket 1; the auxiliary unit 6 is used for assisting in clamping circuit boards of different sizes; a transmission unit 7 is movably arranged above the auxiliary unit 6; the transmission unit 7 is used for conveying circuit boards; the probe 2 is fixedly arranged on the power unit 5; the power unit 5 is used for controlling the extension and retraction of the probe 2; the probe 2 is used for detecting a circuit board; the power unit 5 is fixedly arranged in the model; the top cover 4 is movably arranged right above the mould box 3; the top cover 4 is used for detecting whether the probe 2 is conductive or not; the control unit is used for controlling the power unit 5 and the transmission unit 7; the power unit 5 and the transmission unit 7 are electrically connected with the control unit; the control unit controls the units to be matched with each other, operation is not interfered with each other, full-automatic detection of the circuit board is achieved, if detection is unqualified, the control unit can distinguish the unqualified circuit boards, and unqualified positions on the circuit board are displayed on a computer screen.
As shown in fig. 1, 2, 3, 4, 5, 11 and 13, the probe 2 includes a tapered probe head 21, an elastic cylinder 22, a conductive ring 23, a hollow needle body 24 and a string 25; the top of the hollow needle body 24 is fixedly arranged with the bottom of the elastic column 22, and the concrete installation mode adopts a glue connection YH-395 to carry out glue connection; the elastic cylinder 22 is a hollow cylinder; the top of the elastic cylinder 22 is fixedly provided with a conical probe 21, and the concrete installation mode adopts bonding YH-395 glue for bonding; an annular groove 26 is formed below the top of the outer surface of the hollow needle body 24; the conducting ring 23 is fixedly arranged in the annular groove 26 on the outer surface of the hollow needle body 24; the inner diameter of the conducting ring 23 is slightly smaller than the diameter of the annular groove 26 on the outer surface of the hollow needle body 24; the specific installation mode adopts clamping installation, and one end of the thin rope 25 is fixedly connected to the bottom of the conical probe 21; the concrete connection mode adopts Yihe YH-395 glue for glue joint; the diameter of the probe 2 is slightly smaller than that of the hole on the circuit board; the diameter of the hole on the circuit board is determined according to the board thickness of the circuit board; the maximum deformation diameter of the elastic cylinder 22 is larger than the maximum diameter of the hole on the circuit board; the conical probe 21 is used for detecting whether each component on the circuit board is damaged; the conductive ring 23 is used for communicating with the probe 2, so that current can pass through the probe 2; when the probe 2 detects the soldering tin position of each electronic component on the circuit board, the elastic cylinder 22 plays a good role in reducing pressure, when the probe 2 extends out, the conical probe 21 at the top of the probe 2 is contacted with the soldering tin position of the circuit board, the soldering tin position of the circuit board can be damaged, and when the pressure reaches a certain value, the elastic cylinder 22 deforms, so that the pressure is reduced, and the conical probe 21 cannot damage the soldering tin position of the circuit board.
As shown in fig. 1, 2, 3, 4, 5 and 10, the interior of the mold box 3 is a hollow structure; a plurality of stepped holes 31 are formed in the top of the mold box 3 in an array manner; a conductive circular ring 32 is fixedly arranged on the inner wall of the upper part of the stepped hole 31; the outer diameter of the conductive circular ring 32 is slightly larger than the diameter of the upper part of the stepped hole 31; the specific installation mode adopts clamping installation; the inner diameter of the conductive circular ring 32 is the same as that of the lower part of the stepped hole 31, and the probe 2 is arranged in the stepped hole 31 in a sliding mode; a conductive ring 32 is fixedly arranged on the inner wall of the upper part of the stepped hole 31 and used for electrifying the probe 2; a lead is fixedly arranged in the top of the mould box 3, and the conductive ring 32 is fixedly connected with the lead; the lead is fixedly arranged in the top of the mould box 3, so that the probe 2 can be prevented from being rubbed with the probe 2 or the lead can be prevented from being rubbed with the lead in the telescopic process, and the space in the mould box 3 can be saved.
As shown in fig. 1 and 12, a plurality of metal discs 41 are fixedly mounted on the bottom of the top cover 4 in an array manner; the metal disc 41 is installed by welding at the bottom of the top cover 4; the metal wafers 41 correspond to the probes 2 on the mould box 3 one by one; the diameter of the metal wafer 41 is smaller than the radial diameter of the probe 2; the metal wafer 41 on the top cover 4 corresponds to the probes 2 on the mold box 3 one by one to detect the conductivity of the probes 2, when the probes 2 are used for a long time, the probes 2 may be damaged and not conductive, and the like, and the top of the probes 2 is relatively fine and difficult to observe by naked eyes, so that the metal wafer 41 on the top cover 4 and the top of the probes 2 are contacted and electrified with each other, and whether the probes 2 are conductive or not can be accurately detected, so that whether the probes 2 are damaged or not can be judged.
As shown in fig. 6, 11 and 13, the power unit 5 includes an electric push rod 51, a cylindrical sleeve 52 and an electric telescopic rod 53; the electric push rods 51 are arranged in an array and fixedly arranged at the bottom of the mould box 3; a plurality of the cylindrical sleeves 52 are fixedly arranged at the top of the electric push rod 51; a plurality of electric telescopic rods 53 are fixedly arranged inside the cylindrical sleeve 52; the tops of the electric telescopic rods 53 are fixedly connected with the other ends of the thin ropes 25; the concrete connection mode adopts Yihe YH-395 glue for glue joint; the electric push rod 51 is used for controlling the extension and retraction of the probe 2, when the circuit board is positioned on the mold box 3, the electric push rod 51 is used for controlling the probe 2 to extend out, so that the conical probe 21 at the top of the probe 2 is contacted with a soldering point of the circuit board, or the conical probe 21 at the top of the probe 2 passes through a hole in the circuit board, and when the hole in the circuit board is positioned in the middle position of the elastic cylinder 22 on the probe 2, the thin rope 25 on the electric telescopic rod 53 pulls the conical probe 21 at the top end of the elastic cylinder 22, so that the periphery of the elastic cylinder 22 radially deforms outwards, and the periphery of the elastic cylinder 22 is contacted with the hole in the circuit board; the circuit board detection is realized.
As shown in fig. 1, 2, 3, 4 and 9, the assist unit 6 includes a link frame 61, a lead screw 62 and a ball sleeve 63; the connecting frame 61 is of a cuboid structure; and the two ends of the top of the connecting frame 61 are respectively provided with a rectangular lug 64; the bottom of the connecting frame 61 is fixedly arranged on the bracket 1; two ends of the screw rod 62 are fixedly arranged at the center of the rectangular lug 64 at two ends of the connecting frame 61; a ball sleeve 63 is slidably mounted on the screw rod 62; the ball sleeve 63 is used to reduce friction, so that the moving distance of the ball sleeve 63 on the screw 62 is accurate; and a gear is arranged on the outer surface of the ball sleeve 63; the gear is arranged on the outer surface of the ball sleeve 63, so that the transmission unit 7 can control the gear to rotate, the transmission unit 7 can move on the lead screw 62, when circuit boards of different sizes are detected, the movement of the transmission unit 7 can be controlled by controlling the movement of the ball sleeve 63, and the transmission unit 7 can clamp the circuit boards of different sizes.
As shown in fig. 1, 2, 3, 4, 5, 7, 8 and 9, the transmission unit 7 includes a rectangular frame 71, a turntable 72, a servo motor 73, a rotation motor 74, a wheel 75 and a belt 76; the upper parts of one side surfaces of the two rectangular frames 71 are respectively provided with a rectangular groove 77; the lower parts of the same side surfaces of the two rectangular frames 71 are respectively provided with a plurality of round holes; the round holes are adjacent to each other in the middle of the rectangular frame 71, and two ends of the rectangular frame 71 are respectively provided with only two round holes which are at a certain distance; the lower parts of the two rectangular frames 71 are of hollow structures; two ends of the bottom of the two rectangular frames 71 are symmetrically provided with rectangular boxes 78 respectively; the distance between the two rectangular boxes 78 is larger than the side length of the mold box 3; the distance between the rectangular boxes 78 is larger than the side length of the mould box 3, so that the two rectangular boxes 78 can be fixedly arranged with the ball sleeve 63 on the screw 62 of the auxiliary unit 6; the inside of the rectangular box 78 is fixedly provided with a rotating motor 74; a gear is fixedly arranged on the rotating motor 74; the rotating motor 74 is used for controlling the rectangular frame 71 to move on the lead screw 62; outward bulges are arranged at the top ends of the side edges of the plurality of the rotating discs 72; the top end of the side edge of the rotary disc 72 is provided with an outward bulge for clamping the circuit board.
After the circuit board is conveyed to the rotating wheel 75 through the belt 76, the probe 2 starts to ascend, when the conical probe 21 at the top of the probe 2 abuts against the circuit board, two sides of the circuit board may be separated from the rotating wheel 75, so that the circuit board is damaged, the circuit board is prevented from being separated by clamping the circuit board by the bulge at the edge of the rotating disc 72, and when the rotating wheel 75 rotates to drive the circuit board to move, two side edges of the circuit board also move at the bottom of the rotating disc 72, and simultaneously, the rotating disc 72 is driven to rotate; a plurality of rotating discs 72 are rotatably arranged inside rectangular grooves 77 on the side surface of the rectangular frame 71; the plurality of servo motors 73 are respectively and fixedly arranged in the lower part of the rectangular frame 71, and the rotating shafts of the plurality of servo motors 73 are respectively and rotatably arranged with the plurality of round holes; the plurality of rotating wheels 75 are respectively and fixedly installed on the rotating shafts of the plurality of servo motors 73; two rotating wheels 75 on the side surfaces of two ends of the two rectangular frames 71 are respectively and rotatably provided with a belt 76; the belt 76 is made of rubber; the belt 76 is used for transporting the circuit board through the rotation of runner 75, also can adjust the position of circuit board when runner 75 transports the circuit board, when the circuit board transmits to runner 75 through belt 76, the vision sensor will detect the circuit board and send a signal to the control unit, the control unit receives the signal that the vision sensor sent, can carry out analysis processes formation of image to the signal, the control unit matches the signal of handling the formation of image with the position signal of probe 2 on the mould case 3, if not match, the servo motor 73 of control unit will control the rectangle frame 71 intermediate position rotates, servo motor 73 controls runner 75 and rotates, runner 75 drives the circuit board and removes, thereby the position of accurate adjustment circuit board.
A vision sensor is fixedly arranged at the bottom of the top cover 4; the vision sensor is electrically connected with the control unit; the vision sensor is used for detecting the position of a circuit board and the position of a hole in the circuit board, the position above the circuit board is detected through the vision sensor, or the soldering position of each electronic component on the circuit board is detected, then the control unit processes and images signals sent by the vision sensor, the control unit matches the processed and imaged information with the position information of the probe 2 on the mold box 3, and the control unit controls the movement of the transmission unit 7 and the auxiliary unit 6, so that the soldering positions of the hole in the circuit board or each electronic component on the circuit board correspond to the probe 2 one by one.
A displacement sensor is fixedly arranged on the auxiliary unit 6; the displacement sensor is electrically connected with the control unit; the displacement sensor is used for detecting the moving distance of the transmission unit 7; according to the size of circuit board, thereby can accurately adjust the distance between two rectangle framves 71 of drive unit 7 through displacement sensor and realize placing the circuit board of equidimension not, when detecting, two rectangle framves 71 can also move to same direction simultaneously, and when the hole on the circuit board does not have a corresponding with probe 2, two rectangle framves 71 can finely tune for hole and probe 2 one-to-one on the circuit board.
As shown in fig. 11, the outer surfaces of the conical probe 21 and the elastic cylinder 22 at the top of the probe 2 are respectively plated with a copper film; the copper plating on the outer surfaces of the conical probe 21 and the elastic cylinder 22 at the top of the probe 2 is used for electrifying the probe 2 when a circuit board is detected, detecting the short circuit and open circuit conditions of each hole on the circuit board through the conduction of the conical probe 21 and the elastic cylinder 22, and simultaneously detecting whether electronic components on the circuit board are damaged or not; the copper films on the outer surfaces of the conical probe 21 and the elastic cylinder 22 can be abraded in the long-time use process, so that the electric conduction is poor, at the moment, the conducting performance of the probe 2 can be kept as long as the conical probe 21 and the elastic cylinder 22 are taken down and plated with a copper film again, the whole probe 2 does not need to be detached, and the use and maintenance are convenient and fast.
When the automatic soldering machine works, when electronic components on a circuit board are detected, the circuit board is in a feeding area, the size of the circuit board is detected through a vision sensor, the vision sensor sends signals to a control unit, the control unit receives the signals to control inward rotating motors 74 at the bottoms of two rectangular frames 71 to rotate, so that the rectangular frames 71 are driven to move on a lead screw 62, the distance between the two rectangular frames 71 is detected through a displacement sensor, the distance between the two rectangular frames is slightly larger than one side of the circuit board, the circuit board is moved onto a belt 76 through a feeding device, the servo motors 73 at the same ends of the two rectangular frames 71 rotate simultaneously to drive the belt 76 to rotate, the belt 76 drives the circuit board to move, when one end of the circuit board contacts with a rotating wheel 75, the servo motors 73 at the middle positions of the two rectangular frames 71 rotate simultaneously to drive the rotating wheel 75 to rotate, when the circuit board moves to be right above a die, the rotating wheel 75 stops rotating, the vision sensor at the bottom of a top cover 4 starts to detect soldering positions of the electronic components on the circuit board and sends signals to the control unit, and the control unit analyzes and images the signals to be matched with position signals of a probe 2 on a die box 3; if the two rectangular frames 71 are not matched with each other, the control unit controls the servo motor 73 at the middle position of the two rectangular frames 71 to rotate slightly, so that the rotating wheel 75 is controlled to rotate slightly, the rotating wheel 75 drives the circuit board to move slightly, meanwhile, the control unit controls the rotating motor 74 in the two rectangular boxes 78 at the bottoms of the two rectangular frames 71 to rotate slightly, the rotating motor 74 drives the ball sleeve 63 to move slightly, and the control unit controls the servo motor 73 and the rotating motor 74 to stop rotating simultaneously until the soldering positions of all electronic components on the circuit board correspond to the positions of the probes 2 on the mold box 3 one by one.
At this time, the electric push rod 51 pushes out the probe 2, the conical probe 21 at the top of the probe 2 contacts with a soldering tin position on the circuit board, the electric push rod 51 stops moving, the probe 2 is electrified to detect each component on the circuit board, and when the probe 2 contacts with the soldering tin position of the circuit board, the elastic cylinder 22 plays a role in reducing pressure, so that the soldering tin position cannot be damaged by the conical probe 21, after the detection is finished, the electric push rod 51 returns to the original position, the control unit controls the servo motor 73 at the middle position of the rectangular frame 71 and the rotating motor 74 at the other end to rotate, the circuit board moves onto the belt 76 through the rotating wheel 75, the belt 76 conveys the circuit board to the tail end, the rotating wheel 75 and the belt 76 stop rotating, the circuit board moves to a corresponding area through the blanking device, if the detected circuit board is unqualified, the blanking device in the blanking area places the circuit board in a grid area, and if the detection is unqualified, the blanking device in the blanking area places the circuit board in the grid area, and performs the next process.
The second embodiment is as follows: as shown in fig. 13, the second embodiment is different from the first embodiment in that the second embodiment is used for detecting an unwelded circuit board hole, and the probe 2 is pushed by an electric push rod 51; the probe 2 is raised; and the probe 2 passes through a hole on the circuit board; when the middle position of the elastic cylinder 22 is positioned in the hole; the electric push rod 51 stops moving; the probe 2 stops rising; the electric telescopic rod 53 pulls the string 25; the string 25 pulls the conical probe 21 to move downwards; the periphery of the elastic cylinder 22 deforms outwards and radially; the elastic cylinder 22 is fully contacted with the hole on the circuit board; the probe 2 is electrified; current flows to the circuit board through the elastic cylinder 22, so that the circuit board is detected, and according to the circuit boards with different sizes and different sizes of holes in the circuit boards, the deformation degrees of the elastic cylinder 22 are different, so that the conductive effect is better.
When the circuit board is in operation, when holes in the circuit board are detected, the circuit board is in a feeding area, the size of the circuit board is detected through a vision sensor, the vision sensor sends signals to a control unit, the control unit receives the signals to control inward rotating motors 74 at the bottoms of the two rectangular frames 71 to rotate, so that the rectangular frames 71 are driven to move on the lead screw 62, the distance between the two rectangular frames 71 is detected through a displacement sensor, the distance between the two rectangular frames 71 is slightly larger than one side of the circuit board, the circuit board is moved onto a belt 76 through a feeding device, the servo motors 73 at the same ends of the two rectangular frames 71 rotate simultaneously to drive the belt 76 to rotate, the belt 76 drives the circuit board to move, when one end of the circuit board contacts with the runner 75, the servo motors 73 at the middle positions of the two rectangular frames 71 rotate simultaneously to drive the runner 75 to rotate, the runner 75 drives the runner to move, when the circuit board moves to be right above a die, the runner 75 stops rotating, the vision sensor at the bottom of the top cover 4 starts to detect the positions of the holes in the circuit board and sends signals to the control unit, and the control unit analyzes and images the signals to be matched with position signals of the probes 2 on the die box 3; if the two rectangular frames 71 are not matched with each other, the control unit controls the servo motor 73 at the middle position of the two rectangular frames 71 to rotate slightly, so that the rotating wheel 75 is controlled to rotate slightly, the rotating wheel 75 drives the circuit board to move slightly, meanwhile, the control unit controls the rotating motor 74 in the two rectangular boxes 78 at the bottoms of the two rectangular frames 71 to rotate slightly, the rotating motor 74 drives the ball sleeve 63 to move slightly, and the control unit controls the servo motor 73 and the rotating motor 74 to stop rotating simultaneously until the positions of all holes on the circuit board correspond to the positions of the probes 2 on the mold box 3 one by one.
At this time, the electric push rod 51 pushes out the probe 2, the conical probe 21 at the top of the probe 2 penetrates through a hole in a circuit board, when the hole is located in the middle of the elastic cylinder 22, the electric push rod 51 stops moving, at this time, the electric telescopic rod 53 inside the cylindrical sleeve 52 at the top of the electric push rod 51 slightly contracts, the electric telescopic rod 53 inside the cylindrical sleeve 52 at the top of the electric push rod 51 returns to the original position by pulling the string 25 between the top of the electric telescopic rod 53 and the bottom of the conical probe 21, the elastic cylinder 22 deforms outwards and the periphery of the elastic cylinder 22 deforms and contacts with the hole in the circuit board, the probe 2 is electrified to detect each hole in the circuit board, after detection is completed, the electric telescopic rod 53 inside the cylindrical sleeve 52 at the top of the electric push rod 51 returns to the original position, the string 25 between the top of the electric telescopic rod 53 and the bottom of the conical probe 21 does not retract, the elastic cylinder 22 returns to the original position, the electric push rod 51 returns to the original position, the control unit controls the servo motor 73 at the middle of the rectangular frame 71 and the other end of the circuit board to move to the belt 76 through the runner 76, the tail end of the runner 76, the runner 75 and the circuit board and moves to a corresponding area, if the circuit board is detected, the qualified area, the circuit board is placed in the blanking area, and the blanking area is placed in the next step, and the blanking area, if the qualified area, the blanking device is placed in the blanking area.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A full-automatic circuit board testing device comprises a support (1), a probe (2), a mold box (3), a top cover (4), a power unit (5), an auxiliary unit (6), a transmission unit (7) and a control unit; the method is characterized in that: the bottom of the bracket (1) is fixedly provided with a mould box (3); the top of the bracket (1) is fixedly provided with an auxiliary unit (6); the auxiliary unit (6) is used for assisting in clamping circuit boards of different sizes; a transmission unit (7) is movably arranged above the auxiliary unit (6); the transmission unit (7) is used for conveying a circuit board; the probe (2) is fixedly arranged on the power unit (5); the power unit (5) is used for controlling the extension and retraction of the probe (2); the probe (2) is used for detecting a circuit board; the power unit (5) is fixedly arranged in the model; the top cover (4) is movably arranged right above the mould box (3); the top cover (4) is used for detecting whether the probe (2) is conductive or not; the power unit (5) and the transmission unit (7) are electrically connected with the control unit.
2. The full-automatic circuit board testing device according to claim 1, characterized in that: the probe (2) comprises a conical probe (21), an elastic cylinder (22), a conductive ring (23), a hollow needle body (24) and a string (25); the top of the hollow needle body (24) is fixedly arranged with the bottom of the elastic cylinder (22); the elastic cylinder (22) is a hollow cylinder; the top of the elastic cylinder (22) is fixedly provided with a conical probe (21); an annular groove (26) is formed below the top of the outer surface of the hollow needle body (24); a conducting ring (23) is fixedly arranged in an annular groove (26) on the outer surface of the hollow needle body (24); one end of the string (25) is fixedly connected with the bottom of the conical probe (21).
3. The full-automatic circuit board testing device according to claim 2, characterized in that: the interior of the mould box (3) is of a hollow structure; a plurality of stepped holes (31) are formed in the top of the mould box (3) in an array manner; a conductive circular ring (32) is fixedly arranged on the inner wall of the upper part of the stepped hole (31); the inner diameter of the conductive circular ring (32) is the same as that of the lower part of the stepped hole (31), and the probe (2) is arranged in the stepped hole (31) in a sliding mode.
4. The full-automatic circuit board testing device according to claim 3, characterized in that: a plurality of metal wafers (41) are fixedly arranged at the bottom of the top cover (4) in an array manner; the metal wafers (41) correspond to the probes (2) on the mould box (3) one by one; and the diameter of the metal disc (41) is smaller than the radial diameter of the probe (2).
5. The full-automatic circuit board testing device according to claim 4, characterized in that: the power unit (5) comprises an electric push rod (51), a cylindrical sleeve (52) and an electric telescopic rod (53); the electric push rods (51) are arranged in an array and fixedly installed at the bottom of the mould box (3); the bottoms of the cylindrical sleeves (52) are fixedly arranged at the top of the electric push rod (51); the electric telescopic rods (53) are fixedly arranged inside the cylindrical sleeve (52); the top of the cylindrical sleeve (52) is fixedly provided with a probe (2); the tops of the electric telescopic rods (53) are fixedly connected with the other end of the thin rope (25).
6. The full-automatic circuit board testing device according to claim 5, characterized in that: the auxiliary unit (6) comprises a connecting frame (61), a lead screw (62) and a ball sleeve (63); the connecting frame (61) is of a cuboid structure; rectangular convex blocks (64) are respectively arranged at two ends of the top of the connecting frame (61); the bottom of the connecting frame (61) is fixedly arranged on the bracket (1); two ends of the lead screw (62) are fixedly arranged at the central positions of rectangular lugs (64) at two ends of the connecting frame (61); a ball sleeve (63) is slidably mounted on the screw rod (62); and a gear is arranged on the outer surface of the ball sleeve (63).
7. The full-automatic circuit board testing device of claim 6, characterized in that: the transmission unit (7) comprises a rectangular frame (71), a turntable (72), a servo motor (73), a rotating motor (74), a rotating wheel (75) and a belt (76); the upper parts of one side surfaces of the two rectangular frames (71) are respectively provided with a rectangular groove (77); the lower parts of the same side surfaces of the two rectangular frames (71) are respectively provided with a plurality of round holes; the round holes are adjacent to each other in the middle of the rectangular frame (71), and two ends of the rectangular frame (71) are respectively provided with only two round holes which are at a certain distance; the lower parts of the two rectangular frames (71) are of hollow structures; two ends of the bottom of each rectangular frame (71) are symmetrically provided with a rectangular box (78) respectively; the distance between the two rectangular boxes (78) is greater than the side length of the mould box (3); a rotating motor (74) is fixedly arranged in the rectangular box (78); a gear is fixedly arranged on the rotating motor (74); the top ends of the side edges of the plurality of the turntables (72) are provided with outward bulges; the plurality of turntables (72) are rotatably arranged in rectangular grooves (77) on the side surfaces of the rectangular frame (71); the servo motors (73) are respectively and fixedly arranged in the lower part of the rectangular frame (71), and rotating shafts of the servo motors (73) are respectively and rotatably arranged with the round holes; the rotating wheels (75) are respectively and fixedly arranged on rotating shafts of the servo motors (73); and belts (76) are respectively rotatably arranged on the rotating wheels (75) on the side surfaces of the two ends of the two rectangular frames (71).
8. The full-automatic circuit board testing device according to claim 7, characterized in that: a vision sensor is fixedly arranged at the bottom of the top cover (4); the vision sensor is electrically connected with the control unit.
9. The full-automatic circuit board testing device of claim 8, characterized in that: a displacement sensor is fixedly arranged on the auxiliary unit (6); the displacement sensor is electrically connected with the control unit.
10. The full-automatic circuit board testing device of claim 9, characterized in that: and a layer of copper film is respectively plated on the outer surfaces of the conical probe (21) and the elastic cylinder (22) at the top of the probe (2).
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| CN202211446704.2A CN115739705B (en) | 2022-11-18 | 2022-11-18 | Full-automatic circuit board test equipment |
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| CN202211446704.2A CN115739705B (en) | 2022-11-18 | 2022-11-18 | Full-automatic circuit board test equipment |
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| CN115739705A true CN115739705A (en) | 2023-03-07 |
| CN115739705B CN115739705B (en) | 2023-06-02 |
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Cited By (1)
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|---|---|
| CN115739705B (en) | 2023-06-02 |
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