CN115825692A - Full-automatic circuit board on-line function test system - Google Patents

Abstract

The invention discloses a full-automatic circuit board on-line function test system, which comprises: frame, carrier input mechanism, accredited testing organization, letter sorting mechanism, display, PLC controller. Through the mode, the full-automatic circuit board on-line function testing system disclosed by the invention can automatically carry out the circuit board FT test, realizes automatic operation, improves the testing efficiency and saves the labor cost.

Description

A fully automatic circuit board online function test system

technical field

The invention relates to the technical field of testing, measurement and automation of electronic products, in particular to a fully automatic circuit board online function testing system.

Background technique

At present, when performing FT testing, manual feeding and detection is generally used for operation, but manual operation has the following disadvantages:

a. Personnel are required to operate the test equipment and confirm the test items. The test takes a long time and repeated mechanical operations. One person operates one FT test. The production capacity is low and a lot of human resources are required.

b. Operators need certain operating skills, and the operating efficiency is low.

c. The shortage of labor force and the rising cost of human resources lead to the continuous increase of production cost.

In order to save manpower, time and hardware resources, improve test efficiency, and improve product quality, it is necessary to introduce automated production and testing.

Contents of the invention

The technical problem mainly solved by the present invention is to provide a fully automatic circuit board online function testing system, which has the advantages of high reliability, precise positioning, compact structure, etc., and has broad market prospects in the application and popularization of test and measurement automation equipment.

In order to solve the problems of the technologies described above, a technical solution adopted in the present invention is:

A fully automatic circuit board online functional testing system is provided, which includes: a rack, a carrier input mechanism, a testing mechanism, a sorting mechanism, a carrier return mechanism for sending empty carriers back to the previous process equipment, and a PLC The controller, the carrier input mechanism, the testing mechanism and the sorting mechanism are arranged in the frame, and the carrier input mechanism passes through the testing mechanism to place the carrier containing the product sent to the detection position, the PLC controller is respectively connected with the carrier input mechanism, testing mechanism, sorting mechanism and display to control the operation of each mechanism,

The test mechanism includes a test base for installing and placing detection equipment, a positioning fixed plate, a visual inspection device, a lower splint and an upper splint, and the positioning fixed plate and/or the upper splint are provided with detection probes electrically connected to the detection equipment , the lower splint is set on the test base, the positioning and fixing plate is set on the lower splint, the visual detection device is movable in the test base, and the upper splint can be lifted and fixed on the positioning and fixing plate. The top of the board, to press down the carrier and the product, so that the detection probe and PCBA conduction, so as to realize LCD detection,

The carrier input mechanism includes a carrier conveyor belt and a lifting drive device, the carrier conveyor belt is located on both sides of the positioning fixed plate, and the lifting drive device drives the carrier conveyor belt down, so that the carrier falls on the positioning fixed plate Above, the sorting mechanism includes a suction cup for sucking NG products, a retrieving drive mechanism for driving the suction cup, and an NG conveyor belt for sending NG products to the defective product area.

In a preferred embodiment of the present invention, the material fetching drive mechanism includes an X-axis linear module, a Y-axis linear module, and a Z-axis drive mechanism, and the X-axis linear module is arranged in the frame through a support frame. And drive the Y-axis linear module to move back and forth, the Y-axis linear module drives the Z-axis drive mechanism to translate left and right through the first movement plate, and the Z-axis drive mechanism drives the suction cup to move up and down through the second movement plate.

In a preferred embodiment of the present invention, the upper splint is provided with a lift cylinder for driving the upper splint up and down.

In a preferred embodiment of the present invention, the upper clamping plate is provided with a positioning pin that is movably connected with the positioning hole on the positioning fixing plate, and the positioning plate is provided with a positioning pin that is movably connected with the positioning hole at the bottom of the carrier .

In a preferred embodiment of the present invention, the positioning and fixing plate is provided with a sensor for sensing the presence or absence of the carrier.

In a preferred embodiment of the present invention, the visual detection device is movably connected to the test base through a camera adjustment bracket, and the camera adjustment bracket includes a translation guide rail, a first connecting frame, a lifting guide rail, and a second connecting frame. The translation guide rail is arranged on the top of the test base, the first connection frame is slidably connected to the translation guide rail, and the second connection frame for installing the industrial camera is slidably connected to the lifting guide rail arranged on the first connection frame. The fixing screw is threadedly connected to the second connecting frame, and its inner end is movably connected with the lifting guide rail to lock or unlock the position of the second connecting frame.

In a preferred embodiment of the present invention, the visual detection device adopts an industrial camera or a CCD visual detection device.

In a preferred embodiment of the present invention, the lower clamping plate and the positioning and fixing plate are provided with through slots for the visual inspection device to obtain LCD display information of the PCBA board.

In a preferred embodiment of the present invention, the frame is provided with a display and a tricolor light for reminding and alarming.

In a preferred embodiment of the present invention, a rotary drive mechanism is arranged on the second moving plate, and the output end of the rotary drive mechanism is connected with the suction cup for taking out material to drive the suction cup for axial rotation.

The beneficial effects of the invention are: not only the FT test of the circuit board can be automatically performed to realize the automatic operation, but also the test efficiency is improved and the labor cost is saved.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative work, wherein:

Fig. 1 is the structural representation of a preferred embodiment of a kind of full-automatic circuit board online function testing system of the present invention;

Fig. 2 is a schematic diagram of the internal structure of a preferred embodiment of a fully automatic circuit board online function testing system of the present invention;

Fig. 3 is a partial structure schematic diagram of a preferred embodiment of a fully automatic circuit board online function testing system of the present invention;

Fig. 4 is a schematic diagram of the detection station structure of a preferred embodiment of a fully automatic circuit board online functional testing system of the present invention;

FIG. 5 is a schematic diagram of the connection structure of the visual inspection device of a preferred embodiment of a fully automatic circuit board online function testing system of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Fig. 1-5, the embodiment of the present invention comprises:

A fully automatic circuit board on-line functional testing system, which mainly detects the LCD display of the circuit board, and its structure includes: frame 1, carrier input mechanism, testing mechanism 7, sorting mechanism, display 2, PLC controller 3, The carrier input mechanism, the test mechanism and the sorting mechanism are arranged in the frame, and the carrier input mechanism passes through the test mechanism to send the carrier 9 with products to The detection position, the display is arranged on the frame, and the PLC controller is respectively connected with the carrier input mechanism, the testing mechanism, the sorting mechanism and the display to control the operation of each mechanism.

Further preferably, the frame is provided with a tricolor light 4 for reminding and alarming.

Further preferably, the frame is provided with a carrier return mechanism 5 to return empty carriers to the previous process equipment.

The test mechanism 7 includes a test base 71 for installing and placing detection equipment, a positioning and fixing plate 72 , a visual inspection device 73 , a lower splint 74 and an upper splint 75 . Detection probes electrically connected to the detection equipment are arranged on the positioning fixing plate and/or the upper splint.

Wherein, the detection equipment can adopt conventional detection instruments in the field (Relay board, burner, etc.).

The lower splint is set on the test base, the positioning and fixing plate is set on the lower splint, the visual detection device is movably set in the test base, and the upper splint can be lifted and set on the positioning and fixing plate To press down or release the carrier and product upwards, so that the detection probe is connected to the PCBA to complete the LCD detection.

Further preferably, the upper splint is provided with a lifting cylinder or a lifting module 76 for driving the upper splint up and down.

Further preferably, the upper clamping plate is provided with a positioning pin that is movably connected with the positioning hole on the positioning and fixing plate, and the positioning plate is provided with a positioning pin that is movably connected with the positioning hole at the bottom of the carrier.

Further preferably, the positioning and fixing plate is provided with a sensor for sensing the presence or absence of the carrier.

When testing: If the PCBA product has an LCD, set up a visual inspection device (industrial camera) under the LCD position of each product, directly capture the information displayed on the LCD through the camera, and then compare the information displayed on the LCD segment by segment To judge whether the displayed information is consistent, so as to determine whether the product is qualified; if the PCBA product does not have an LCD, connect an LCD to the PCBA or the test base, and then transmit the LCD information on the PCBA to the external LCD through the test probe , and then use the visual detection device to obtain and judge the detection information. At this time, the LCD can be placed in the test base or fixed at other positions.

Further preferably, the visual inspection device is arranged on the camera adjustment bracket. The camera adjustment bracket includes a translation guide rail 731, a first connecting frame 732, a lifting guide rail 733, and a second connecting frame 734. The translation guide rail is arranged on the top of the test base, and the first connecting frame is slidably connected to the translation guide rail. , the second connecting frame for installing the industrial camera is slidingly connected with the lifting guide rail arranged on the first connecting frame, the fastening screw is threadedly connected to the second connecting frame, and its inner end is movably connected with the lifting guide rail , to lock or unlock the position of the second connecting frame, and adjust the position of the camera by adjusting the positions of the first and second connecting frames, so as to meet the detection of different types of products. Wherein, the light source 735 is arranged on the test base or on the first connecting frame above the camera. In order to improve the accuracy of camera lifting, a guide rod movably connected with the second connecting frame can also be added.

Further preferably, the visual detection device may use an industrial camera 736 or a CCD visual detection device.

Further preferably, through slots are provided on the lower clamping plate and the positioning and fixing plate, so that the visual inspection device can obtain the display information of the LCD on the PCBA board for detection and judgment.

The carrier input mechanism includes a carrier conveyor belt 6 and a lifting drive device that drives the carrier conveyor belt to move up and down. The carrier conveyor belt passes between the upper splint and the positioning and fixing plate. The lifting drive device is arranged on the carrier The two ends of the conveyor belt are used to drive the conveyor belt and the carrier down, so that the carrier falls on the positioning and fixing plate for easy detection.

Further preferably, the lifting drive device can use conventional lifting equipment such as lifting cylinders and linear modules connected to the frame on the carrier conveyor belt to drive the overall lifting of the carrier conveyor belt.

The sorting mechanism includes a retrieving mechanism for grabbing and carrying NG products, and an NG conveyor belt 81 for sending NG products to the defective product area, so that the PLC controller can control the retrieving mechanism to the specified coordinates according to the test results. Take NG products.

The retrieving mechanism includes an X-axis linear module 82, a Y-axis linear module 83, a Z-axis drive mechanism 84, and a suction cup 85. The X-axis linear module is arranged in the frame through a support frame and drives the Y axis. The axis linear module moves back and forth along the X-axis direction, and the output end of the Y-axis linear module drives the Z-axis driving mechanism to translate left and right along the Y-axis direction through the first moving plate, and the output end of the Z-axis driving mechanism is connected to the second The movement boards are connected to drive the reclaiming sucker to move up and down through the second movement board.

Further preferably, the Z-axis drive mechanism can use a linear module, or directly use a cylinder to drive the lifting of the reclaiming suction cup.

Further preferably, the support frame is provided with a motion guide parallel to the X-axis linear module, one end of the Y-axis linear module is connected to the output end of the X-axis linear module, and the other end is connected to the moving rail through a slider. The guide rail is slidingly connected to improve the precision of the suction cup movement.

Further preferably, a rotary drive mechanism (including a rotary motor or a rotary platform) is provided on the second moving plate, and the output end of the rotary drive mechanism is connected to the suction cup for driving the suction cup to rotate axially.

The working principle of the fully automatic circuit board online functional testing system includes: when the previous station process is completed, the SN of the product to be tested is transmitted to the test program by scanning the QR code of the product to be tested on the guide rail to complete the three circuits. SN scanning of the board; the triple board carrier carries the product through the carrier conveyor belt and flows between the upper splint and the positioning fixed plate of the testing mechanism; after the testing mechanism senses the carrier and the product through the sensor, the lifting drive device drives the carrier conveyor belt And the carrier descends until the carrier falls on the positioning and fixing plate, and the positioning pin is used for positioning to fix the carrier at the test position; after the sensor confirms that the positioning is correct, the upper splint is pressed down by the lifting cylinder, so that the detection probe and The PCBA board is turned on, and the program automatically runs the test. During the test, the visual inspection device is used to detect and judge the LCD display information, and the test result is transmitted to the PLC controller without personnel confirmation; after the test is completed, the upper splint and the carrier are conveyed The belt is lifted to make the carrier return to the carrier conveyor belt; the PLC controller controls the movement of the reclaiming mechanism according to the test results, and grabs the NG product through the reclaiming suction cup to the NG conveyor belt to flow into the bad area, and test the good product Then flow to the next station. The empty carrier moves to the front through the carrier return mechanism and runs in a cycle.

The beneficial effect of a kind of fully automatic circuit board online function test system of the present invention is:

(1) After the three-connected board carrier flows out from the automatic assembly/welding track, it enters the online functional testing machine to directly perform automatic circuit board FT testing. The whole process does not require manual operation and realizes automatic operation.

(2) By changing the test mechanism, the test type can be quickly adjusted, which has strong versatility and reduces costs;

(3) Multiple circuit boards can be tested at the same time, which not only improves the efficiency of testing, but also saves labor costs.

The above descriptions are only examples of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the description of the present invention, or directly or indirectly used in other related technical fields, shall be The same reasoning is included in the patent protection scope of the present invention.

Claims (10)

1. The utility model provides a full-automatic circuit board is at functional test system on line which characterized in that includes: the device comprises a frame, a carrier input mechanism, a testing mechanism, a sorting mechanism, a carrier backflow mechanism for returning a no-load tool to a previous process device and a PLC (programmable logic controller), wherein the carrier input mechanism, the testing mechanism and the sorting mechanism are arranged in the frame, the carrier input mechanism penetrates through the testing mechanism to convey a carrier with a product to a detection position, the PLC is respectively connected with the carrier input mechanism, the testing mechanism, the sorting mechanism and a display to control the operation of each mechanism,

the testing mechanism comprises a testing base used for installing and placing detection equipment, a positioning fixing plate, a visual detection device, a lower clamping plate and an upper clamping plate, wherein the positioning fixing plate and/or the upper clamping plate are/is provided with detection probes electrically connected with the detection equipment, the lower clamping plate is arranged on the testing base, the positioning fixing plate is arranged on the lower clamping plate, the visual detection device is movably arranged in the testing base, the upper clamping plate is arranged above the positioning fixing plate in a lifting way so as to downwards press a carrier and a product, so that the detection probes are conducted with PCBA, and the LCD detection is realized,

carrier input mechanism includes carrier conveyer belt and lift drive, the carrier conveyer belt is located the both sides of location fixed plate, lift drive drives the carrier conveyer belt decline for the carrier falls on the location fixed plate, sorting mechanism is including the sucking disc that is used for absorbing NG product, drive the sucking disc motion get the material actuating mechanism, be used for sending NG product to the regional NG conveyer belt of defective products.

2. The system of claim 1, wherein the material taking driving mechanism comprises an X-axis linear module, a Y-axis linear module and a Z-axis driving mechanism, the X-axis linear module is disposed in the rack through a supporting frame and drives the Y-axis linear module to move back and forth, the Y-axis linear module drives the Z-axis driving mechanism to translate left and right through a first moving plate, and the Z-axis driving mechanism drives the material taking sucker to move up and down through a second moving plate.

3. The system of claim 1, wherein the upper clamp plate is provided with a lifting cylinder for driving the upper clamp plate to lift.

4. The system of claim 1, wherein the top clamp plate has a positioning pin movably connected to the positioning hole of the positioning fixing plate, and the positioning plate has a positioning pin movably connected to the positioning hole of the bottom of the carrier.

5. The system of claim 1, wherein the positioning and fixing plate is provided with a sensor for sensing whether the load is present or absent.

6. The system of claim 1, wherein the vision inspection device is movably connected to the testing base through a camera adjusting bracket, the camera adjusting bracket comprises a translation guide rail, a first connecting frame, a lifting guide rail and a second connecting frame, the translation guide rail is arranged at the top of the testing base, the first connecting frame is slidably connected to the translation guide rail, the second connecting frame used for installing the industrial camera is slidably connected to the lifting guide rail arranged on the first connecting frame, a fastening screw is in threaded connection with the second connecting frame, and the inner end of the fastening screw is movably connected to the lifting guide rail so as to lock or unlock the position of the second connecting frame.

7. The system of claim 1, wherein the vision inspection device is an industrial camera or a CCD vision inspection device.

8. The system of claim 1, wherein the lower clamp plate and the positioning and fixing plate are provided with through grooves for the visual inspection device to obtain LCD display information of the PCBA.

9. The fully automatic circuit board on-line function testing system of claim 1, wherein a display and a tri-color light for alerting an alarm are disposed on the rack.

10. The system of claim 1, wherein the second moving plate is provided with a rotation driving mechanism, and an output end of the rotation driving mechanism is connected to the material taking suction cup to drive the material taking suction cup to rotate axially.

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