KR200341202Y1 - Automatic inspection system for industrial printed circuit board - Google Patents

Abstract

The present invention discloses an automated industrial printed circuit board inspection system, in which a printed circuit board is transferred, upper and lower inspection and screening are performed automatically in one stack, and productivity and efficiency are high. Industrial printed circuit board automatic inspection system according to a preferred embodiment of the present invention includes a printed circuit board supply means, a printed circuit board inspection means and a printed circuit board alignment means. The printed circuit board supply means individually transports a plurality of stacked printed circuit boards and arranges them for inspection. The printed circuit board inspection means inspects the circuit diagram and the surface appearance of the printed circuit board supplied by the printed circuit board supply means to determine whether there is any defect. The printed circuit board alignment means selects and loads the printed circuit board, which is judged as defective by the printed circuit board inspection means, as good or bad.

Description

Industrial printed circuit board automatic inspection system {AUTOMATIC INSPECTION SYSTEM FOR INDUSTRIAL PRINTED CIRCUIT BOARD}

The present invention relates to an industrial printed circuit board inspection device, and more specifically, a plurality of industrial printed circuit boards can be loaded once, and the transfer of the printed circuit board, the upper and lower surface inspection and sorting can be collectively processed, and the manual work can be performed. Compared to the automatic inspection system of industrial printed circuit board, which has high inspection efficiency compared to the present invention.

In general, a method of inspecting the surface appearance of a substrate, such as a circuit, a terminal, a bonding pad, and a gold tab on a printed circuit board, includes a method of inspecting whether electricity is supplied using a probe; There is a method in which the inspector visually inspects the appearance such as the circuit diagram and the terminal of the printed circuit board.

However, the method of inspecting a printed circuit board by using a probe simply checks the electrical connection state of the circuit, so it is impossible to check whether the integrated circuit or the terminal printed on the board meets the standard, and can inspect both sides of the board together. Therefore, additional equipment is required.

When the inspector visually inspects the circuit diagram on the printed circuit board, there is a difference in the reliability of the inspection according to the skill of the operator, and the circuit that is not visible on the printed circuit board cannot be inspected, and the inspection time is consumed a lot. As the substrate grows larger, there is a problem that the accuracy of inspection is further reduced.

In order to solve these problems, a method for determining the amount of money by taking a picture of a printed circuit board with a camera or the like has been developed. In the case of using such a method, however, most workers typically carry printed circuit boards individually and inspect them by the inspection method, and after the inspection, the printed circuit board is separated and separated into good and defective products. Due to the difficulty in loading, inspecting and screening printed circuit boards, factory automation could not be realized.

In addition, as the thickness of the printed circuit board becomes thinner and the width becomes larger, the printed circuit board sag occurs, and thus there is a problem in that an accurate appearance image cannot be obtained.

The present invention is devised to solve the problems of the conventional printed circuit board inspection apparatus as described above, the object of the present invention is to transfer the printed circuit board of various sizes and types in a single stack without sagging, transfer, top and bottom inspection and screening It is possible to provide automatic industrial printed circuit board automatic inspection system which can be automatically performed and productivity and efficiency accordingly.

In order to achieve the above object, the present invention, a printed circuit board supply means for individually transporting a plurality of stacked printed circuit boards arranged to be inspectable; Printed circuit board inspection means for inspecting the circuit diagram and surface appearance of the printed circuit board supplied by the printed circuit board supply means to determine whether there is a defect; And it provides a printed circuit board automatic inspection system comprising a printed circuit board alignment means for sorting and loading the printed circuit board determined by the printed circuit board inspection means as good or bad.

1 is a plan view of an automated industrial printed circuit board inspection system according to a preferred embodiment of the present invention.

FIG. 2 is a front view of the automated printed circuit board inspection system shown in FIG. 1. FIG.

3 is a left side view of the automated printed circuit board inspection system shown in FIG. 1.

4 is a right side view of the automated printed circuit board inspection system shown in FIG. 1.

5 is a front view of a printed circuit board supply means according to a preferred embodiment of the present invention.

6 is a side view of the printed circuit board supply means shown in FIG.

Figure 7 is a state of use of the clean roller according to a preferred embodiment of the present invention.

8 is a plan view of a picking apparatus according to a preferred embodiment of the present invention.

9 is a front view of the picking device shown in FIG. 8;

10 is a side view of the picking apparatus shown in FIG. 8;

11 is a plan view of a forward / reverse device according to a preferred embodiment of the present invention.

12 is a side view of the forward / reverse device shown in FIG.

13 is a plan view of a vision inspection apparatus according to a preferred embodiment of the present invention.

14 is a front view of the vision inspection device shown in FIG.

15 is a side view of the vision inspection device shown in FIG.

16 is a plan view of the inverting apparatus according to a preferred embodiment of the present invention.

17 is a front view of the inversion device shown in FIG. 16;

18 is a side view of the inversion device shown in FIG. 16;

19 is a plan view of the alignment means according to a preferred embodiment of the present invention.

20 is a front view of the alignment means shown in FIG. 19;

21 is a plan view of a failure display device according to a preferred embodiment of the present invention.

22 is a front view of the failure display device shown in FIG. 21;

FIG. 23 is a side view of the failure display device shown in FIG. 21; FIG.

<Description of the symbols for the main parts of the drawings>

1000: printed circuit board supply means 1100: loading elevator

1200: lifting device 1300: first feeder

1400: washing device 1500: stop device

2000: printed circuit board inspection means 2100: upper surface inspection unit

2200: inverter 2300: lower surface inspection unit

3000: printed circuit board alignment means 3100: second transfer device

3200: unloading elevator 3300: bad display

Hereinafter, with reference to the accompanying drawings will be described in more detail the industrial printed circuit board automatic inspection system according to a preferred embodiment of the present invention.

1 is a plan view of an automatic industrial printed circuit board automatic inspection system according to a preferred embodiment of the present invention, Figure 2 is a front view of the automatic industrial printed circuit board inspection system shown in Figure 1, Figure 3 is the industrial printing shown in Figure 1 4 is a left side view of the automatic circuit board inspection system, and FIG. 4 is a right side view of the industrial printed circuit board inspection system shown in FIG.

1 to 4, the industrial printed circuit board automatic inspection system according to the present invention, the printed circuit board supply means 1000 for transporting a plurality of stacked printed circuit boards individually, arranged to be inspected; Printed circuit board inspection means (2000) for checking the circuit diagram and the surface appearance of the printed circuit board supplied by the printed circuit board supply means to determine whether there is a defect; And a printed circuit board alignment means 3000 for selecting and loading the printed circuit board, which is judged as defective by the printed circuit board inspection means, as a good product or a defective product.

The printed circuit board supply means 1000 includes a loading elevator 1100, a lifting device 1200, a first transfer device 1300, a cleaning device 1400, and a stop device 1500. 2000 includes an upper surface inspecting unit 2100, an inverting device 2200, a lower surface inspecting unit 2300, and a controller (not shown). The printed circuit board alignment means 3000 may include a second transfer device 3100, a plurality of unloading elevators 3200, and a failure display device 3300.

The upper inspection unit 2100 includes a first picking device 2110, a first forward / reverse device 2120, and a first vision inspection device 2130, and the inversion device 2200 includes a rotary arm 2210 and a third device. The X-axis moving arm 2220 is included, and the lower surface inspection unit 2300 forms a symmetrical structure with the upper surface inspection unit 2100. The repeated structural description of the lower surface inspection unit 2300 is replaced with the description of the upper surface inspection unit 2100 on the left side.

5 and 6, the loading elevator 1100 includes a stacked end 1110 for loading a printed circuit board, a transfer screw 1120 and a transfer guide 1130 for elevating the stacked end 1110. And a top sensor (not shown) for adjusting the rising height of the motor 1140 and the stacked end 1110.

In the stacked end 1110, a plurality of narrow and long plate-shaped members are arranged at a predetermined interval, and a printed circuit board is mounted on a vertically lateral side of the plate-shaped member.

The stacking end 1110 is moved up and down by a rotating feed screw 1120, and a transfer guide 1130 is disposed at both ends of the stacking end 1110 with the feed screw 1120 and the plate-shaped member interposed therebetween. The loading elevator 1100 is driven using a reversible motor 1140 capable of forward and reverse rotation to move the stacked stage 1110 up and down.

The top of the loading elevator 1100 is mounted with a top sensor (not shown) that can detect the maximum height of the printed circuit board is adjusted so that the stacking end 1110 does not rise above a certain height.

The lifting device 1200 is disposed above the loading elevator 1100, and includes a plurality of vacuum pads 1210 for lifting and lowering a printed circuit board by vacuum, and an ejector or a vacuum pump for driving the vacuum pads 1210. 1220.

The vacuum pad 1210 is connected to the ejector or the vacuum pump 1220 to receive a vacuum and sucks up one printed circuit board of the plurality of printed circuit boards lifted by the loading elevator 1100. The vacuum pads 1210 are provided in plural to be applied to the adsorptive portions irregularly formed on printed circuit boards of various sizes and shapes, and the spacing can be adjusted.

The first transfer device 1300 is disposed above the loading elevator 1100 and transfers the printed circuit boards lifted up by the loading elevator 1100 and then lifted one by one by the lifting device 1200 to the test standby position. The first conveying apparatus 1300 is a two-line feed rail for conveying a printed circuit board wound around two guide rails 1310 and a pulley (not shown) mounted at both ends of the guide rail 1310. A belt 1320.

Below the guide rail 1310, the shaft member 1340 rotated by a predetermined angle by the stepper motor 1330 is disposed at a right angle with the guide rail 1310 extending upward and downward and disposed in the transverse direction. The shaft member 1340 may rotate and move one guide rail 1310 in the axial direction to widen and narrow the gap.

Washing apparatus 1400 is made of a plurality of adhesive rolls having a different adhesive force and the gap can be adjusted. The washing apparatus 1400 is disposed to form a right angle with the first conveying apparatus 1300 in the middle of the first conveying apparatus 1300, and the length of the adhesive roll constituting the washing apparatus 1400 is the first conveying apparatus 1300. Longer than the width of

Referring to FIG. 7, the adhesive force of the pressure-sensitive adhesive roll is the strongest at the top of the pressure-sensitive adhesive roll 1411, and gradually decreases downward. The adhesive rolls include the first roll 1411 disposed at the uppermost portion, the second and third rolls 1412 and 1413 disposed parallel to the central portion, and the fourth and fifth rolls 1414 and 1415 disposed parallel to the lowermost portion. It is composed. The shaft 1416 holding each adhesive roll can adjust the vertical height, and the printed circuit board has the lowermost fourth and fifth rolls 1414 and 1415 and the center portion of the second and third rolls 1412 and 1413. The foreign material on the upper and lower surfaces is removed by adhering to the adhesive roll while passing the gap therebetween. The uppermost first adhesive roll 1411 may be peeled off when the adhesive force is lowered with a consumption agent such as a general adhesive tape.

5 and 6 again, the stop device 1500 is disposed directly below the lower end of the first transfer device 1300, and a stop sensor (not shown) for detecting that the printed circuit board has reached the test standby position. And a plurality of stoppers 1510 and a plurality of stoppers 1510 protruding from the lower portion of the first transfer device 1300 through which the printed circuit board passes by the stop sensor and blocking the flow of the printed circuit board. A plurality of support members 1520 for supporting the substrate.

The stopper 1510 has a screw shape, and when the stop sensor detects the printed circuit board, the stopper 1510 is lifted below the first transfer device 1300 by a cylinder (not shown) or the like to stop the printed circuit board. At this time, the support member 1520 on the upper portion of the stopper 1510 supports a printed circuit board in order to prevent sagging of a large printed circuit board in a rectangular bar shape having a predetermined width.

8 to 10, the first picking device 2110 may include a vacuum suction unit 2111 that sucks and lifts a printed circuit board with a vacuum, and moves the vacuum suction unit 2111 to a desired position on the printed circuit board. And a first X-axis moving arm 2112 that is driven to move and seat on the first forward / reverse device as described below.

The vacuum suction unit 2111 is similar in configuration to the lifting device 1200 of the printed circuit board supply means 1000, and is provided with a plurality of vacuum pads 2111a attached to the printed circuit board to absorb and lift the printed circuit board by vacuum. And an ejector or vacuum pump (not shown) for applying a vacuum to the vacuum pad.

The vacuum pad 2111a may adjust a gap and a shape to lift the printed circuit board in response to the size and shape of the printed circuit board.

The first X-axis moving arm 2112 moves the vacuum pad 2111a to the test standby position of the printed circuit board supply means 1000 to lift the printed circuit board, and brings the printed circuit board to the test means 2000. As a moving part for coming in, the position is controlled by a servo mechanism (not shown) for accurate position control of the vacuum suction unit 2111.

The first X-axis moving arm 2112 is provided with an actuator 2112a which reciprocates in the X-axis direction in the printed circuit board inspection means, and is attached to the actuator 2112a to a test standby position on the printed circuit board supply means 1000. And a cylinder 2112b which is driven to move the vacuum suction unit 2111 to the transferred printed circuit board.

11 and 12, the first forward / reverse device 2120 may include a first boat 2121 on which an inspection target printed circuit board is placed, and a first Y for moving the boat in the Y-axis direction for inspection. Axial moving arm 2123 is included.

The first boat 2121 is in the form of a rectangular tray, except for a plurality of grooves having a narrow and long rectangular shape formed on the left side to grip the printed circuit board by the inverter 2200, which will be described below. The bottom surface is blocked, and a clamping device 2122 for stably clamping the printed circuit board is provided on left and right sides.

As shown in FIG. 12, the clamping device 2122 is provided on both left and right sides and is driven by a pneumatic cylinder (not shown).

The clamping device support plate 2122a on the left side and the pressing member 2122b on the support plate 2122a are included. The support plate 2122a moves left and right, and the pressing member 2122b on the top of the support plate 2122a moves up and down to clamp the printed circuit board.

The clamping device on the right side is a member 2122c that is bent like a finger joint, and can be clamped without damaging materials having different thicknesses by varying angles of bending by a cylinder (not shown).

The first Y-axis moving arm 2123 is attached to the bottom of the first boat 2121 to move the boat 2121 forward / backward in the Y-axis direction at the same speed, and a ball screw type linear actuator is used.

13 to 15, the first vision inspection apparatus 2130 includes a CCD camera 2131, an illumination device 2132, a second X-axis moving arm 2133, and a Z-axis moving arm 2134. .

The CCD camera 2131 is disposed on an upper portion of the first forward / reverse device 2120 on which the printed circuit board is seated and transferred to acquire a surface image of the printed circuit board. The inspection items of the CCD camera 2131 are integrated circuits on the printed circuit board, positions of terminals, stains, pinholes, plating, etc., and the CCD camera 2131 used in the preferred embodiment of the present invention is printed inside the printed circuit board. Photo Solder Resist surface can be photographed and inspected.

The illumination device 2132 is intended to help the CCD camera 2131 to accurately capture the image of the printed circuit board, and may preferably emit direct light and metering light.

The second X-axis moving arm 2133 is equipped with a CCD camera 2131, and can reciprocate the camera 2131 in the X-axis direction to photograph the wide printed circuit board, and the ball screw type linear actuator It consists of a servomotor (not shown).

The second Z-axis moving arm 2134 is a member moving in the Z-axis direction to adjust focusing for photographing printed circuit boards having different thicknesses, and the second X-axis moving arm 2133 to which the CCD camera 2131 is attached. ) And adjusts the height of Z-axis automatically by using stepping motor (not shown).

16 to 18, the reversing apparatus 2200 is a device for overturning the material after the top surface inspection in the top surface inspection unit 2100, and includes a rotation arm 2210 and a third X-axis moving arm 2220.

The rotary arm 2210 is a shaft-shaped member which grasps the printed circuit board inspected by the upper surface inspection unit 2100 and rotates by 180 °, and includes a gripper 2211, an air inlet 2212, and a photocam sensor 2213.

The rotary arm 2210 is provided with an air inlet 2212 at the end and an air passage inside the rotary arm 2210, and supplies air to the gripper 2211 connected to the rotary arm 2210 through these.

The photocam sensor 2213 surrounds and is attached to the air inlet 2212, and detects the amount of rotation of the rotary arm 2210 to stop the rotation when the rotary arm 2210 is rotated more than a predetermined amount of rotation of the printed circuit board. Prevents damage.

The gripper 2211 is mounted on the rotation arm 2210 in a direction perpendicular to the rotation axis of the rotation arm 2210 and has a plurality of finger shapes capable of holding a printed circuit board of various sizes.

Each end of the gripper 2211 is provided with a space for the printed circuit board.

An air pad 2211a is attached to a surface of the gripper 2211 to which the printed circuit board is inserted, thereby stably holding the board without damaging the printed circuit board. Since the air pads 2211a are expanded according to the amount of air injected therein, the substrates having different thicknesses may be appropriately caught due to the gap between the air pads 2211a.

The third X-axis moving arm 2220 is fixed to the lower portion of the rotary arm 2210 on which the gripper 2211 is mounted to move the rotary arm 2210 itself in the X-axis direction, and uses a linear actuator.

The controller (not shown) includes a display device (not shown), an image processing device (not shown), and a handler control device (not shown), and are disposed inside and outside the casing of the main body to control the system.

The display apparatus is mounted outside the main body casing and compares and displays an image of a genuine printed circuit board previously photographed and stored, and an image of an inspection target printed circuit board inspected by the aforementioned inspection means.

The image processing apparatus is disposed inside the main body casing, and analyzes two images displayed and displayed on the display device to determine whether the image meets the standard value of the genuine product, thereby determining whether the printed circuit board is inspected.

The handler control device is disposed inside the main body casing, and is a device for data communication and control between the display device, the image processing device, and the upper surface inspection unit, the inversion unit, and the lower surface inspection unit, and serves as a basic control device of the facility itself.

19 and 20, the second conveying apparatus 3100 has the same configuration and function as the first conveying apparatus 1300 of the printed circuit board supply means 1000, and the width of the guide rail 3110 is adjustable. And a conveying belt 3120 which is rotated by a pulley (not shown) mounted at the inner end of the guide rail 3110.

The unloading elevator 3200 is disposed directly below the second transfer device 3100, and carries a good quality unloading elevator 3210 for loading a good quality printed circuit board, and selectively prints a poor quality printed circuit board according to a user's intention. It consists of a number of defective goods unloading elevators 3220 and 3230.

The good unloading elevator 3210 loads and lowers the printed circuit board on which both sides of the printed circuit board are judged by the printed circuit board inspection means 2000, and the defective unloading elevators 3220 and 3230 are printed. The circuit board inspection means 2000 loads and lowers the printed circuit board which is determined to be less than the standard value of the good product. Defective unloading elevators 3220 and 3230 may be provided in number depending on the degree of defect or the user's intention.

21 to 23, the failure display apparatus 3300 includes a thermal printer (not shown) and a second Y-axis moving arm 3320.

The failure display device 3300 is a type of failure on the defective printed circuit board when the defective printed circuit board conveyed by the second transfer device 3100 is loaded in the defective unloading elevators 3220 and 3230 located below. And a device for covering the defective label indicating the position and the like.

The thermal printer (not shown) can print the type and location of the defect by using heat, and it is not a map method that is generally used, but a method of inputting the position and type as text by separating them into blocks. Print a label.

The printed label is adsorbed by the vacuum pad 3321 provided on the second Y-axis moving arm 3320 by the same action as that of the lifting device 1200 of the printed circuit board supply means 1000, and thus each defective article unloading elevator ( 3220, 3230) and covered on the bad printed circuit board.

When the operation of the substrate supply, inspection and sorting stacking of the automatic industrial printed circuit board automatic inspection system according to a preferred embodiment of the present invention formed as described above are as follows.

First, a large amount of printed circuit boards are stacked on the stacking elevator 1110 of the loading elevator 1100 by an operator. Since the loading elevator 1100 may stack materials up to 300 mm according to height adjustment of the stacking stage 1110, for example, when the material is 0.5 mm thick, about 600 substrates may be loaded at a time.

The plurality of printed circuit boards stacked on the stacking stage 1110 are transferred along the grooves of the feed screw 1120 that the stacking stage 1110 is rotated by the drive motor 1140. The maximum lift height of the stacked stage 1110 is automatically adjusted by a top sensor (not shown) mounted on the loading elevator 1100. That is, when the top sensor detects that the uppermost printed circuit board is lifted, it stops the rising of the loading elevator 1100.

When the raised printed circuit board is stopped by the top sensor, the vacuum pad 1210 of the lifting device 1200 is lowered by a device capable of forming a vacuum, such as an ejector or a vacuum pump 1220, and the printed circuit board and the like. Contact. The vacuum pad 1210 comes into contact with the printed circuit board and is in a vacuum state, thereby adsorbing the printed circuit board, and then rising again to lift the printed circuit board one by one.

When the lifting device 1200 adsorbs and lifts the printed circuit board by vacuum, the first conveying device 1300 extends vertically above the loading elevator 1100 and a loading elevator 1100 directly below the lifted printed circuit board. At this time, the interval of the guide rail 1310 of the first transporting device 1300 is wider than the width of the printed circuit board to lift and lower the printed circuit board between the rail 1310.

When a single printed circuit board is lifted by the lifting device 1200 to the upper part of the loading elevator 1100 and the first transport device 1300, the guide rail 1310 on one side of the first transport device 1300 is stepped. The motor 1330 is moved by the shaft member which rotates by a predetermined angle, so that the gap with the other guide rail is narrowed.

At this time, the spacing between the guide rails 1310 corresponds to the width of the printed circuit board. The width and the spacing of the printed circuit boards correspond to each other because the two conveying belts 1320 disposed inside the guide rail 1310 are separated from each other. This is because the printed circuit board may be placed on the transfer belt 1320 without being dropped between the transfer belts 1320.

When the interval between the guide rails 1310 is narrowed, the vacuum of the lifting device 1200 which adsorbs the printed circuit board is released, and the contact between the vacuum pad 1210 and the printed circuit board is released so that the printed circuit board is guide rail 1310. It is conveyed on the inner conveyance belt 1320.

The printed circuit board during the transfer removes the foreign substances on the substrate while passing through the cleaning apparatus 1400 disposed in the middle of the first transfer apparatus 1300.

The cleaning apparatus 1400 includes five adhesive rolls 1411, 1412, 1413, 1414, and 1415. The printed circuit board includes lower fourth and fifth rolls 1414 and 1415 and second and third portions in the center. Passing between the rolls 1412 and 1413 removes all foreign matter from the front and back.

The reason why the cleaning device 1400 is made of a plurality of adhesive rolls having different adhesive strengths is to facilitate replacement of the adhesive rolls. When the printed circuit board passes the adhesive roll, the fourth and fifth adhesive rolls 1414 and 1415 disposed at the lower portion may remove foreign substances from the lower portion of the printed circuit board, and the second and third adhesive rolls 1412 and 1413 may be disposed at the center portion thereof. Stick the foreign material on the printed circuit board. In this way, it is difficult to install and separate, and is not cost-effective and time-consuming, by separating the contaminated adhesive rolls one by one and attaching the contaminated adhesive rolls one by one.

At this time, if the adhesive force of each adhesive roll is different, foreign matter adhered to the adhesive roll will be collected on the adhesive roll having the strongest adhesive force. That is, the foreign matter adhering to the lower fourth and fifth adhesive rolls 1414 and 1415 has stronger adhesive force of the second and third adhesive rolls 1412 and 1413 at the center, and thus the second and third adhesive rolls 1412. And the foreign materials of the second and third adhesive rolls 1412 and 1413 disposed at the center portion, the first adhesive rolls 1411 are stronger because the adhesive force of the first adhesive roll 1411 disposed on the upper portion is stronger. Will be gathered together. In this case, if only the first adhesive roll 1411 is replaced, it is not necessary to replace the remaining adhesive rolls, which is efficient. For easier replacement of the adhesive roll, the first adhesive roll 1411 is preferably a consumption agent of the same principle as a general adhesive tape.

The printed circuit board washed as described above is continuously transferred by the transfer belt 1320 of the first transfer apparatus 1300. When the printed circuit board being transferred is detected by a stop sensor (not shown) disposed directly between the transfer rails 1320, the latching member 1510 is raised to support the printed circuit board to move the printed circuit board. Will stop.

In the case of a narrow printed circuit board, one locking member 1510 may be raised, and in the case of a wide printed circuit board, the plurality of locking members 1510 may be raised to support the printed circuit board.

As described above, when the printed circuit boards are transported one by one from the loading elevator 1100 to the stop device 1500 and stop at the test standby position, the first picking device 2110 of the upper surface inspection unit 2100 lifts the printed circuit board. The printed circuit board is mounted on the first forward / reverse device 2120 of the upper surface inspecting unit 2100.

The picking process of the first picking device 2110 is as follows.

First, the part of the 1st X-axis moving arm 2112 which consists of the actuator 2112a extends to the left side. This extended length is short enough to place the first X-axis moving arm 2112 on the printed circuit board, which is formed by two parts of the first X-axis moving arm 2112 to reduce the volume of the inspection means 2000. This is because it is configured to overlap.

Next, the part of the 1st X-axis moving arm 2112 which consists of the cylinder 2112b is extended again, and the printed circuit board which stopped at the test standby position is arrange | positioned. After the X-axis stroke of the first X-axis moving arm 2112 is completed, the vacuum suction unit 2111 having a configuration similar to that of the lifting device 1200 is controlled by a servo mechanism (not shown), so as to accurately adjust the printed circuit board. It is lowered to the suction position, and the printed circuit board is vacuum-adsorbed and lifted up. Thereafter, the first X-axis moving arm 2112 returns to its original position, and the printed circuit board is placed on the boat 2121 of the first forward / reverse device 2120 which is waiting below.

When the printed circuit board is placed on the boat 2121 of the first forward / reverse device 2120 by the first picking device 2110, the printed circuit board is controlled by a servo mechanism (not shown), whereby The right edge of the coincides with the right edge Y of the boat 2121, and the line passing through half of the substrate length is arranged to coincide with the line X passing through half of the boat length.

In order to stably transfer the printed circuit boards arranged as above, the support plate 2122a of the left clamping device 2122 of the boat 2121 is gradually pushed to the right to fill the left and right margins of the printed circuit board seated on the bottom of the boat 2121. This helps to keep the substrate from moving during transfer. Thereafter, the pressing member 2122b on the upper portion of the support plate 2122a is lowered to clamp the support plate 2122a so that the support plate 2122a is not lifted up. Clamp the right side of the circuit board.

When the substrate is stably fixed to the bottom surface of the boat 2121, the first Y-axis moving arm 2123 mounted on the bottom of the boat 2121 moves the boat 2121 at constant speed in the Y-axis direction.

When the substrate being transported on the boat 2121 passes under the CCD camera 2131, the camera 2131 of the first vision inspection apparatus 2130 installed to illuminate the upper surface of the boat 2121 receives a trigger signal. Photograph the upper surface of the substrate.

The camera 2131 may move in the X-axis and Z-axis directions in accordance with the width and height of the inspection target substrate, and the process is as follows.

First, the camera 2131 adjusts and fixes the height of the first Z-axis moving arm 2134 for adjusting focusing according to the thickness of the printed circuit board so that the camera 2131 can photograph the longitudinal image of the printed circuit board at once. Thereafter, the position of the second X-axis moving arm 2133 is adjusted so that the camera 2131 is disposed above the right edge of the boat 2121 so that the camera 2131 can shoot from the right side of the printed circuit board, and the boat 2121 ) Take a picture of the upper surface of the printed circuit board that is seated on the right side.

If the width of the substrate is so wide that the entire image of the substrate cannot be obtained by only one movement of the boat, the boat 2121 is returned again so that the camera 2131 can take the upper surface of the substrate, and the camera 2131 is attached. The second X-axis moving arm 2133 moves to the left in the X-axis direction to acquire an image of the left side of the unprinted printed circuit board, thereby acquiring an image of a portion which has not been captured.

When all of the upper surface of the printed circuit board is photographed as described above, the first forward / reverse device 2120 moves to a position where the inversion device is disposed on the right side, and the inversion device 2200 is gripper 2211 through a gripping groove formed on the bottom surface of the boat. ) Is inserted to hold the PCB up and down.

When air is supplied to the air pad 2211a attached to the gripper 2211, the air pad 2211a floating on the upper and lower sides of the printed circuit board expands and is tightened to hold the substrate. The circuit board can be clamped stably without damaging the printed circuit board.

When the gripper 2211 holds the substrate, the rotary arm 2210 on which the gripper 2211 is mounted rotates 180 °, and the printed circuit board also rotates 180 ° at the same time, thereby inverting the top and bottom of the printed circuit board.

The rotation angle of the rotation arm 2210 is controlled by a servo mechanism (not shown), and the photocam sensor 2213 installed at the end of the rotation arm 2210 stops rotation when the rotation arm 2210 is rotated by a predetermined angle or more. To prevent damage to the substrate.

The reversed printed circuit board is mounted on the boat 2321 of the second forward / reverse device 2320 of the lower surface inspection unit 2300, and the printed circuit board is reversed when the upper surface inspection unit 2100 inspects the upper surface. After acquiring the surface image of the lower surface, the printed circuit board is lifted again by the second picking device 2310.

While the upper and lower surfaces of the printed circuit board are inspected as described above, the surface image of the genuine printed circuit board and the test target printed circuit board is displayed on the display device of the control device (not shown), and the displayed image is displayed on the image processing apparatus of the control device. It is determined by the good or bad, can be loaded into the good elevator and the defective elevator of the alignment device respectively.

The second picking device 2310 lowers the printed circuit board onto the transfer belt 3120 of the alignment means 3000 in the same operation as the first picking device 2110. The alignment means 3000 includes a second transfer device 3100, an unloading elevator 3200, and a failure display device 3300, of which the second transfer device 3100 and the unloading elevator 3200 are printed circuit boards. The same operation as that of the first transfer device 1300 and the loading elevator 1100 of the supply means 1000 is performed in the reverse order.

When the printed circuit board is placed on the transfer belt 3120 of the second transfer device 3100, the printed circuit board judged as good quality is transferred onto the good quality unloading elevator 3210 disposed at the beginning of the alignment means 3000. . Then, the interval between the guide rails 3110 of the second transfer device 3100, such as the guide rails 1310 of the first transfer device 1300, is widened so that the printed circuit board of the good quality unloading elevator 3210 placed directly below. It falls on the stacked end 3211. At this time, the stacked end 3211 is raised to the maximum height by a top sensor (not shown) to support the printed circuit board, and when the printed circuit board is stacked on the stacked end 3211, the stacked end 3211 is positioned at the top. Descending to match height.

The defective goods unloading elevators 3220 and 3230 are also operated on the same principle as the good quality unloading elevators 3210, so that the stacked parts 3221 and 3321 of the respective unloading elevators 3220 and 3230 are sorted according to the types of the goods and the defects. The printed circuit boards are loaded in sequence.

When the defective printed circuit board is loaded in the defective unloading elevators 3220 and 3230, the defective display device 3300 covers the defective display label on which the defective type and location information is printed on the defective printed circuit board. Such a defect label is used to select and reuse the printed circuit board that shows the defect is insufficient or easily enough to correct the error, thereby reducing the waste of materials and increase the cost efficiency.

As described above, the automatic industrial printed circuit board inspection system according to a preferred embodiment of the present invention loads a large amount of industrial printed circuit board once, and performs the transfer, inspection, and selective loading of the printed circuit board automatically, and the inspection time. It is short, so it is efficient. In addition, by adopting a method of taking a surface image while transporting the printed circuit board to the boat stably, it is possible to inspect printed circuit boards having various sizes and thicknesses, and to prevent the sagging of the inspection target substrate to obtain accurate images. As a result, the reliability of the test is high. In addition, it is possible to prevent waste of the printed circuit board material by selectively loading the printed circuit board is determined according to the type of failure.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art will understand that all modifications and changes can be made without departing from the spirit and scope of the present invention.

Claims (23)

A printed circuit board supply means for individually transporting a plurality of stacked printed circuit boards so as to be inspectable; Printed circuit board inspection means for determining the good or bad by examining the circuit diagram and surface appearance on the printed circuit board supplied by the supply means; And Automatic printed circuit board inspection system comprising a printed circuit board alignment means for selecting and loading the printed circuit board judged good or bad by the inspection means as good or bad. The method of claim 1, wherein the printed circuit board supply means, A loading elevator for moving the loaded printed circuit board up and down; A lifting device for lifting and lowering one of a plurality of printed circuit boards loaded in the loading elevator; A first transfer device for transferring the printed circuit board lowered by the lifting device; A cleaning device for removing foreign substances on the printed circuit board carried by the first transfer device; And And a stop device for preventing movement of the printed circuit board so that the printed circuit board transferred by the first transfer device can be stopped at the test standby position. The system of claim 2, wherein the lifting device comprises a vacuum pad for suctioning and lifting the printed circuit board by a vacuum, and an ejector or a vacuum pump for driving the vacuum pad. . According to claim 2, The cleaning device has a different adhesive force, the industrial printed circuit board automatic inspection system, characterized in that consisting of a plurality of adhesive rolls capable of adjusting the gap. The printed circuit board of claim 2, wherein the stop device protrudes from a lower portion of the first transfer device through which the printed circuit board passes by the stop sensor, and the stop sensor detects that the printed circuit board is transferred to the test standby position. The automatic printed circuit board inspection system comprising a plurality of support members for supporting the stopper and the printed circuit board to block the flow of the flow. The method of claim 1, wherein the printed circuit board inspection means, An upper surface inspection unit for inspecting an upper surface of the printed circuit board; An inversion device that rotates the printed circuit board inspected by the upper surface inspection unit by 180 ° to inspect a lower surface of the printed circuit board; A lower surface inspection unit for inspecting a lower surface of the printed circuit board inverted by the inversion device; And And a control unit for controlling the upper surface inspection unit, the inversion device, and the lower surface inspection unit. The system of claim 6, wherein the upper surface inspecting portion and the lower surface inspecting portion have a symmetrical structure. The method of claim 7, wherein the upper surface inspection unit and the lower surface inspection unit, Picking device for lifting and lowering the printed circuit board supplied from the printed circuit board supply means; A forward / reverse device for seating, clamping, and stably transporting a printed circuit board on which the picking device is lifted; And a vision inspection device for acquiring a surface image of the printed circuit board from an upper surface of the printed circuit board mounted on the forward / reverse device. 9. The apparatus of claim 8, wherein the picking device is driven to move a vacuum suction part to suck and lift the printed circuit board into a vacuum, and to move the vacuum suction part to a desired position on the printed circuit board and to mount the printed circuit board to the forward / reverse device. Industrial printed circuit board automatic inspection system comprising a drive unit. 10. The system of claim 9, wherein the driving unit includes a linear actuator and a pneumatic cylinder operated by a servomotor. 10. The method of claim 8, wherein the forward / reverse device includes a boat on which the test printed circuit board is placed, and a first Y-axis moving arm for moving the boat at a constant speed in the Y-axis direction for inspection. Printed circuit board automatic inspection system. 12. The system of claim 11, wherein the boat prevents sagging of the printed circuit board by blocking a bottom surface on which the printed circuit board is seated. 12. The system according to claim 11, wherein the boat has clamping devices by pneumatic cylinders on both left and right sides of the boat so as not to shake the printed circuit board during transportation. According to claim 8, The vision inspection device, CCD camera for photographing the surface image of the printed circuit board; An illumination device which helps the camera to accurately photograph the surface of the printed circuit board; A second X-axis moving arm configured to move the CCD camera in the X-axis direction to photograph the printed circuit board for portions of the wide printed circuit board; And And a Z-axis moving arm for moving the camera in the Z-axis direction to adjust the focusing of the camera for photographing printed circuit boards of different thicknesses. 15. The system of claim 14, wherein the CCD camera is capable of inspecting not only the surface image of the printed circuit board but also the photo solder resist printed surface. The apparatus of claim 6, wherein the inversion device comprises a rotary arm for holding the printed circuit board inspected by the upper surface inspection unit to rotate by 180 °, and a third X-axis moving arm for positioning the rotary arm in an accurate position. Printed circuit board automatic inspection system. 17. The automated printed circuit board inspection system of claim 16, wherein the rotary arm includes a plurality of grippers to stably hold a printed circuit board having various sizes and thicknesses. 18. The system of claim 17, wherein the plurality of grippers hold the both sides of the printed circuit board using air pads. The method of claim 6, wherein the control unit, A display device for comparing and displaying an image of a genuine printed circuit board and an image of an inspection target printed circuit board; An image processing apparatus which processes the image displayed by the display apparatus to determine whether the inspection target printed circuit board is defective; And And a handler control device for data communication and control between the display device, the image processing device, and an upper surface inspecting unit, an inverting unit, and a lower surface inspecting unit. The method of claim 1, wherein the alignment means, A second conveying apparatus which is inspected by the inspecting means and conveyed to selectively load the printed circuit board in which the quantity of payment is determined; A plurality of unloading elevators for sorting and loading the printed circuit board transferred by the second transfer device into genuine and defective products; And Industrial printing characterized in that it comprises a defect display device for covering the sheet printed with the type and location of the defect on the printed circuit board loaded in the unloading elevator for loading the defective products of the printed circuit board transferred by the second transfer device Circuit board automatic inspection system. 21. The apparatus of claim 20, wherein the plurality of unloading elevators comprise a good quality elevator for loading a good quality printed circuit board, and a plurality of bad quality elevators for selectively loading a bad quality printed circuit board according to a user's intention. Industrial printed circuit board automatic inspection system. 21. The apparatus of claim 2 or 20, wherein the first and / or second conveying device comprises two rows of guide rails with adjustable spacing, and two lines arranged inside the guide rail to convey the printed circuit board. Industrial printed circuit board automatic inspection system comprising a conveying belt. 21. The industrial apparatus according to claim 20, wherein the defect display apparatus comprises a thermal printer for printing the position and type of the defect and a second Y-axis moving arm for moving the sheet on which the defect is displayed onto each printed circuit board. Printed circuit board automatic inspection system.