CN117471293B - Full-automatic testing device for PCB circuit board - Google Patents
Full-automatic testing device for PCB circuit board Download PDFInfo
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- CN117471293B CN117471293B CN202311835313.4A CN202311835313A CN117471293B CN 117471293 B CN117471293 B CN 117471293B CN 202311835313 A CN202311835313 A CN 202311835313A CN 117471293 B CN117471293 B CN 117471293B
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- 238000012360 testing method Methods 0.000 title claims abstract description 191
- 230000000712 assembly Effects 0.000 claims abstract description 18
- 238000000429 assembly Methods 0.000 claims abstract description 18
- 230000006835 compression Effects 0.000 claims description 21
- 238000007906 compression Methods 0.000 claims description 21
- 238000003825 pressing Methods 0.000 claims description 17
- 238000012546 transfer Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 24
- 230000008569 process Effects 0.000 abstract description 23
- 239000000523 sample Substances 0.000 description 14
- KENZYIHFBRWMOD-UHFFFAOYSA-N 1,2-dichloro-4-(2,5-dichlorophenyl)benzene Chemical compound ClC1=CC=C(Cl)C(C=2C=C(Cl)C(Cl)=CC=2)=C1 KENZYIHFBRWMOD-UHFFFAOYSA-N 0.000 description 5
- 230000009471 action Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000013100 final test Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 150000003071 polychlorinated biphenyls Chemical class 0.000 description 1
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- 230000001960 triggered effect Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2801—Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP]
- G01R31/2806—Apparatus therefor, e.g. test stations, drivers, analysers, conveyors
- G01R31/2808—Holding, conveying or contacting devices, e.g. test adapters, edge connectors, extender boards
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
- B65G47/74—Feeding, transfer, or discharging devices of particular kinds or types
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0425—Test clips, e.g. for IC's
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
- B65G2201/02—Articles
- B65G2201/0214—Articles of special size, shape or weigh
- B65G2201/022—Flat
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2207/00—Indexing codes relating to constructional details, configuration and additional features of a handling device, e.g. Conveyors
- B65G2207/08—Adjustable and/or adaptable to the article size
Abstract
The invention discloses a full-automatic testing device for a PCB (printed Circuit Board), which comprises a rack, wherein a tray conveying rail which can move up and down relative to the rack and is used for conveying a PCB tray assembly is arranged on the rack, an upper testing clamp assembly and a lower testing clamp assembly are respectively arranged on the upper part and the lower part of the tray conveying rail, a servo driving assembly used for driving the upper testing clamp assembly to move up and down is arranged above the upper testing clamp assembly, the lower testing clamp assembly comprises a base and a lower testing plate main body which protrudes out of the base and can be in contact with the PCB on the PCB tray assembly, the height of the lower testing plate main body protruding out of the base is larger than the height of the tray conveying rail, and two conveying belt assemblies which are arranged in parallel on the tray conveying rail are positioned on the outer side of the lower testing plate main body. The tray assembly is directly tested on line with the PCB, the productivity of equipment is improved, the risk of damage in the product transferring process is reduced, and the occupied area of the equipment is reduced.
Description
Technical Field
The invention relates to a full-automatic testing device for a PCB (printed Circuit Board), and belongs to the technical field of automatic equipment.
Background
In the testing process of the PCB, the probes of the upper and lower testing fixtures are communicated with each testing point of the PCB to perform testing. In the existing test mode, a PCB is usually required to be placed in a corresponding tray assembly and then conveyed to a test station through a conveying rail, and due to the existence of the conveying rail and the tray assembly, an upper test fixture and a lower test fixture cannot be subjected to die assembly test under the condition that the tray assembly is placed on the conveying rail, so that the PCB is required to be taken out from the tray assembly through a person or a manipulator and put into the test station, and then taken out and put back into the tray assembly after the test is completed and conveyed to the next operation station through the conveying rail.
This test mode has the following drawbacks: (1) If the taking and placing process of the PCB is completed manually, the whole process has the risks of electrostatic breakdown and collision, and if the robot takes and places, the product needs to be clamped, so that the risk of overlarge stress of the PCB is increased; (2) The CT of the whole production line can be increased and the productivity is reduced by taking and placing actions by people or robots; (3) The floor area is large, the automation integration level is not high, and the efficiency is relatively low.
Disclosure of Invention
The invention aims to solve the technical problem of providing a full-automatic testing device for a PCB, which can realize the direct on-line testing of a tray assembly with the PCB, improve the productivity of equipment, reduce the damage risk in the product transferring process and reduce the occupied area of the equipment.
In order to solve the technical problems, the invention adopts the following technical scheme:
the full-automatic testing device for the PCB comprises a frame, wherein a tray conveying track which can move up and down relative to the frame and is used for conveying a PCB tray assembly is arranged on the frame, an upper testing clamp assembly and a lower testing clamp assembly are respectively arranged on the upper and lower sides of the tray conveying track, a servo driving assembly used for driving the upper testing clamp assembly to move up and down is arranged above the upper testing clamp assembly,
the upper test fixture assembly comprises an upper test board main body which can be contacted with a PCB on the PCB tray assembly;
the lower test fixture assembly comprises a base and a lower test board main body protruding out of the base and capable of being contacted with a PCB on the PCB tray assembly, the height of the lower test board main body protruding out of the base is larger than that of the tray conveying rail, and two conveying belt assemblies which are arranged in parallel of the tray conveying rail are positioned on the outer sides of the lower test board main body;
the servo driving assembly is provided with a first compression bar assembly for synchronously pressing down the tray conveying rail.
The full-automatic testing device of the PCB circuit board is characterized in that: the two ends of the conveying belt assembly are respectively connected with a positioning block and a connecting rod, the connecting rods are connected with connecting blocks which can move up and down relative to the connecting rods and are arranged on side plates of the frame, the connecting rod parts above the connecting blocks are provided with reset springs, and the side plates are also provided with limiting rods for limiting the positioning blocks.
The full-automatic testing device of the PCB circuit board is characterized in that: the conveyer belt subassembly includes the support, the side of support is provided with the extension board along its length direction, the both ends of extension board all are provided with the guide pulley that two dislocation were arranged respectively, and pass through conveyer belt after the guide pulley is spacing is hugged closely the upper and lower surface of extension board, the one end of support is provided with and is used for driving corresponding guide pulley pivoted first servo motor, just the both ends of conveyer belt subassembly all are located the outside of lower test fixture subassembly.
The full-automatic testing device of the PCB circuit board is characterized in that: the side plate is provided with a sliding rail, the connecting blocks are connected to the sliding rail, one of the connecting blocks located on the same side plate can horizontally move relative to the sliding rail, and the frame is provided with a screw rod assembly for driving the connecting block to horizontally move relative to the sliding rail.
The full-automatic testing device of the PCB circuit board is characterized in that: the two sides of the upper test board main body are provided with first positioning guide rods, and the bases of the PCB tray assembly and the lower test fixture assembly are respectively provided with first positioning holes and second positioning holes corresponding to the first positioning guide rods in position;
the lower test board main body is provided with a second positioning guide post, and the PCB is provided with a third positioning hole corresponding to the second positioning guide post in position;
the PCB tray assembly comprises a PCB tray assembly, wherein a PCB positioning hole is formed in the PCB tray assembly, a third positioning guide post which can be inserted into the PCB positioning hole is arranged in the PCB positioning groove, and a plurality of limiting clamping blocks are arranged at the edge of the PCB positioning groove.
The full-automatic testing device of the PCB circuit board is characterized in that: the servo drive assembly comprises a fixed seat fixedly connected to the frame, a movable seat connected through a plurality of ball splines is arranged below the fixed seat, two ball screw assemblies are further arranged between the fixed seat and the movable seat, a second servo motor and a switching drive gear assembly for synchronously driving the ball screw assemblies are arranged on the fixed seat, and a slot for inserting the upper test clamp assembly is arranged at the bottom of the movable seat.
The full-automatic testing device of the PCB circuit board is characterized in that: the top of the upper test fixture assembly is provided with a waist-shaped hole, and the bottom of the movable seat is provided with a cylinder positioning column which can be inserted into the waist-shaped hole; the bottom of the movable seat is also provided with an error-proof positioning block, and the top of the upper test fixture assembly is provided with an error-proof positioning groove corresponding to the error-proof positioning block in shape and position.
The full-automatic testing device of the PCB circuit board is characterized in that: the lower surface of the upper test fixture assembly is provided with a second compression bar assembly for pressing down the PCB tray assembly, and the first compression bar assembly is of an elastic structure.
The full-automatic testing device of the PCB circuit board is characterized in that: the lower test fixture assembly can horizontally move relative to the frame, a rear test fixture connected with the lower test fixture assembly is further arranged in the frame, rotatable rotating shafts are arranged on two sides of the end face of the rear test fixture, which is connected with the lower test fixture assembly, compression clamping jaws are fixedly connected to the rotating shafts, and stress blocks corresponding to the positions of the compression clamping jaws are arranged on two sides of the end face of the lower test fixture assembly, which is connected with the rear test fixture.
The full-automatic testing device of the PCB circuit board is characterized in that: and an air cylinder positioning block and a photoelectric sensor are arranged on the outer side of the conveying belt assembly.
The beneficial effects of the invention are as follows:
1. the method comprises the steps that a tray conveying track for conveying a PCB tray assembly is arranged to be of a structure capable of moving up and down relative to a rack, the PCB tray assembly and the tray conveying track are synchronously driven to move down in the process of pressing down an upper test fixture assembly, after the PCB tray assembly contacts a lower test board main body of the lower test fixture assembly, the tray conveying track continues to move down to be separated from the PCB tray assembly, after the PCB tray assembly is pressed to the lower test board main body, a probe on the lower test board main body is used for being inserted into a PCB, the PCB floats in a PCB placing groove of the PCB tray assembly, and the probe of the upper test board main body is synchronously inserted into the PCB, so that related tests of the PCB can be carried out under the condition of no interference, after the tests are finished, the PCB tray conveying track is synchronously reset through the upward movement of the upper test fixture assembly, the tested PCB is recovered into the PCB placing groove again in the process of resetting, and the PCB is reset to an initial position, and the PCB tray conveying track is used for conveying the PCB tray assembly to the next station PCB;
2. the thickness of the middle support of the whole conveyer belt assembly is very thin through the unique conveyer belt assembly structure, and the transmission structures at two ends of the whole conveyer belt assembly protrude out of the lower test fixture assembly, so that the height of the lower test plate main body protruding out of the base can be effectively reduced, the downward pressing stroke of the upper test fixture assembly is shortened, the test efficiency can be effectively improved, and the performance requirement on the reset spring is lower;
3. through setting up tray conveying rail's width to adjustable structure, can adjust according to the width of different PCB board tray subassembly, the suitability is stronger.
Drawings
Fig. 1 is a front view of a full-automatic testing device for a PCB board according to the present invention;
FIG. 2 is an enlarged schematic view of A in FIG. 1;
FIG. 3 is a front view of a servo drive assembly of a full-automatic PCB testing device of the present invention;
FIG. 4 is a bottom view of a servo drive assembly of a fully automatic PCB testing device according to the present invention;
FIG. 5 is a partial front view of the test fixture assembly of the present invention inserted into a servo drive assembly;
FIG. 6 is a partial side view of the test fixture assembly of the present invention inserted into a servo drive assembly;
FIG. 7 is a bottom view of the upper test fixture assembly of the present invention inserted into a servo drive assembly;
FIG. 8 is a front view of the upper and lower test clamp assemblies of the present invention prior to clamping;
FIG. 9 is a side view of the upper and lower test clamp assemblies of the present invention prior to clamping;
FIG. 10 is a front view of the conveyor belt assembly of the present invention;
FIG. 11 is an enlarged schematic view of B in FIG. 10;
FIG. 12 is a side view of the conveyor belt assembly of the present invention;
fig. 13 is a front view of the PCB board tray assembly of the present invention;
FIG. 14 is a front view of the lower test fixture assembly of the present invention after it is attached to a rear test fixture;
FIG. 15 is a front view of a lower test fixture assembly of the present invention.
Detailed Description
The invention will be further described with reference to the drawings.
As shown in fig. 1 to 15, a full-automatic testing device for a PCB circuit board comprises a frame 100, wherein a tray conveying rail 30 capable of moving up and down relative to the frame 100 and used for conveying a PCB board tray assembly 60 is provided on the frame 100, an upper testing clamp assembly 20 and a lower testing clamp assembly 40 are respectively provided on the upper and lower sides of the tray conveying rail 30, a servo driving assembly 10 used for driving the upper testing clamp assembly 20 to move up and down is provided above the upper testing clamp assembly 20, wherein the upper testing clamp assembly 20 comprises an upper testing board main body capable of contacting with a PCB board 70 on the PCB board tray assembly 60; the lower test fixture assembly 40 comprises a base and a lower test board main body 41 protruding from the base and capable of contacting with the PCB 70 on the PCB tray assembly 60, wherein the height of the lower test board main body 41 protruding from the base is greater than that of the tray conveying rail 30, and two conveying belt assemblies arranged in parallel of the tray conveying rail 30 are positioned outside the lower test board main body 41; the servo driving assembly 10 is provided with a first pressing rod assembly 17 for synchronously pressing down the tray conveying rail 30.
To ensure the test effect, the PCB 70 needs to be separated from the PCB tray assembly 60 and separately contacted with the probes on the upper and lower test board bodies 41 during the final test.
Therefore, in the process of driving the upper test fixture assembly 20 to press down by the servo driving assembly 10, the first pressing rod assembly 17 synchronously drives the tray conveying rail 30 to move down, and since the two parallel conveying belt assemblies are positioned on the outer side of the lower test board main body 41 and the height of the lower test board main body 41 protruding out of the base is larger than that of the tray conveying rail 30, after the PCB board tray assembly 60 on the tray conveying rail 30 contacts the lower test board main body 41, the PCB board tray assembly 60 is stopped on the lower test board main body 41, and the servo driving assembly 10 continuously drives the upper test fixture assembly 20 to press down, so that the tray conveying rail 30 is separated from the PCB board tray assembly 60, and meanwhile, the probes on the upper test board main body are contacted with the PCB board 70, and after the probes on the lower test board main body 41 are contacted with the PCB board 70, the probes are slightly lifted from the PCB board tray assembly 60 to separate the probes on the upper test board main body and the lower test board main body 41, so that the corresponding test can be performed after the PCB board 70 is separated from the PCB board tray assembly 60.
After the test is completed, the upper test fixture assembly 20 is separated from the PCB by moving up the servo drive assembly 10, and the acting force on the PCB tray assembly 60 and the tray conveying rail 30 is eliminated, so that the tested PCB 70 is returned to the PCB tray assembly 60 again in the process of moving up and resetting the tray conveying rail 30, and the PCB tray assembly 60 is conveyed to the next station after the tray conveying rail 30.
In this embodiment, two ends of the conveyor belt assembly are respectively connected with a positioning block 312 and a connecting rod 31, the connecting rod 31 is connected with a connecting block 34 which can move up and down relative to the connecting rod and is arranged on a side plate 101 of the frame 100, a return spring 35 is arranged at the connecting rod 31 above the connecting block 34, and a limiting rod 311 for limiting the positioning block 312 is further arranged on the side plate 101. In the initial state, the position of the tray conveying rail 30 is limited by the limiting rod 311, the reset spring 35 is stretched in the process that the tray conveying rail 30 is pressed down by the first pressing rod assembly 17, and when the test is completed, the tray conveying rail 30 is reset to the initial position under the action of the reset spring 35 in the process that the first pressing rod assembly 17 moves up along with the servo driving assembly 10.
The side plates 101 are provided with slide rails 32, the connecting blocks 34 are connected to the slide rails 32, one of the connecting blocks 34 located on the same side of the side plate 101 can horizontally move relative to the slide rails 32, and the frame 100 is provided with a screw rod assembly 33 for driving the connecting block 34 to horizontally move relative to the slide rails 32. In this embodiment, a driving rod arranged in the frame 100 is driven by a servo motor, and the screw rod assemblies 33 on the side plates 101 on two sides of the frame 100 are synchronously driven by using the bevel gears on two ends of the driving rod, so that synchronous movement of the connecting blocks 34 on two sides is realized, and therefore, the width of the tray conveying track 30 is adjusted, and the applicability is stronger according to the width of different PCB tray assemblies.
The servo drive assembly 10 comprises a fixed seat 11 fixedly connected to the frame 100, a movable seat 14 connected to the lower side of the fixed seat 11 through a plurality of ball splines 13, two ball screw assemblies 15 are further arranged between the fixed seat 11 and the movable seat 14, a second servo motor 12 and a transfer drive gear assembly for synchronously driving the ball screw assemblies 15 are arranged on the fixed seat 11, and a slot 16 for inserting the upper test fixture assembly 20 is arranged at the bottom of the movable seat 14.
The second servo motor 12 synchronously drives the two ball screw assemblies 15, the upper test fixture assembly 20 and the lower test fixture assembly 40 are utilized to keep parallel, and the ball spline is higher in rigidity and better in precision than the linear bearing, so that the compression amount of the test surface probe can be reliably ensured to be consistent, the mechanism inclination caused by the reverse force of the mechanism applied by the probe is avoided, and the compression amount of the probe is either overlarge or overlarge. Moreover, after the width of the tray conveying rail 30 is adjusted, the tray conveying rail 30 may be located at an eccentric position relative to the servo driving assembly 10, and the servo driving assembly 10 adopted in this embodiment is less prone to tilting or deformation due to the reverse pressure on the eccentric.
The top of the upper test fixture assembly 20 is provided with a waist-shaped hole 23, and the bottom of the movable seat 14 is provided with a cylinder positioning column 19 which can be inserted into the waist-shaped hole 23; the bottom of the movable seat 14 is further provided with an error-proof positioning block 18, and the top of the upper test fixture assembly 20 is provided with an error-proof positioning groove corresponding to the error-proof positioning block 18 in shape and position.
In the process of inserting the upper test fixture assembly 20 into the slot 16, the error-proofing positioning groove and the error-proofing positioning block 18 are utilized for error-proofing verification of the insertion direction, and after the insertion is completed, the cylinder positioning column 19 is utilized for positioning after being inserted into the waist-shaped hole 23. In this embodiment, after the upper test fixture assembly 20 is inserted into the socket 16, a certain gap exists between the upper test fixture assembly 20 and the socket 16, and a slight position change can be performed between the two. Similarly, the cylinder positioning column 19 can be properly adjusted in the waist-shaped hole 23. The above design can be understood as the initial positioning of the upper test fixture assembly 20 by the socket 16 and the cylinder positioning post 19.
The two sides of the upper test board main body are provided with first positioning guide rods 21, and the bases of the PCB tray assembly 60 and the lower test fixture assembly 40 are respectively provided with first positioning holes 61 and second positioning holes 44 corresponding to the positions of the first positioning guide rods 21; the lower test board main body 41 is provided with a second positioning guide post 42, and the PCB board 70 is provided with a third positioning hole 72 corresponding to the second positioning guide post 42 in position; a third positioning guide post 62 which can be inserted into the positioning hole of the PCB is arranged in the PCB placing groove of the PCB tray assembly 60, and a plurality of limit clamping blocks 63 are arranged at the edge of the PCB placing groove.
In the process of driving the upper test fixture assembly 20 to be pressed down by the servo driving assembly 10, the first positioning guide rod 21 is inserted into the first positioning hole 61 of the PCB tray assembly 60 to finish positioning between the two, and in the process of continuing to press down, the first positioning guide rod 21 is inserted into the second positioning hole 44 of the base of the lower test fixture assembly 40 to finish positioning of the three.
In the positioning process, the PCB board firstly realizes the preliminary positioning of the PCB board 70 through the third positioning guide post 62 and the limiting clamping block 63; secondly, a cylinder positioning block 313 and a photoelectric sensor 314 are arranged on the outer side of the conveyor belt assembly, in the process that the PCB board tray assembly 60 moves along with the conveyor belt, the cylinder positioning block 313 is in a push-out state, when the photoelectric sensor 314 detects that the PCB board tray assembly 60 is in place, the conveyor belt assembly is triggered to stop, and the cylinder positioning block 313 is retracted, so that the PCB board tray assembly 60 is in a free state on the conveyor belt assembly, and in the process that the first positioning guide rod 21 is inserted into the first positioning hole 61 and the second positioning hole 44 in sequence, as the PCB board tray assembly 60 is in a free state on the conveyor belt assembly, and the upper test fixture assembly 20 can slightly move relative to the slot 16, a certain amount of errors in initial positioning can be compensated by using the first positioning guide rod 21, the first positioning hole 61 and the second positioning hole 44 in the positioning process; finally, in the process of die assembly, the second positioning guide post 42 is arranged on the lower test board main body 41 and inserted into the third positioning hole 72 of the PCB 70 for final positioning, so that the probes of the upper and lower test fixtures can be accurately inserted into the test holes of the PCB 70 to be tested.
The conveyer belt subassembly includes support 36, the side of support 36 is provided with extension board 39 along its length direction, the both ends of extension board 39 all are provided with two guide pulleys 38 of dislocation arrangement respectively, and pass through the conveyer belt behind the guide pulley 38 is spacing hugs closely the upper and lower surface of extension board 39, the one end of support 36 is provided with and is used for driving corresponding guide pulley 38 pivoted first servo motor 37, just the both ends of conveyer belt subassembly all are located the outside of lower test fixture subassembly 40.
By arranging two guide wheels 38 for limiting the conveyor belt at two ends of the support plate 39 in a staggered manner, the thickness of the middle supporting part of the conveyor belt assembly is very thin, as shown in fig. 10-12, and the two ends of the conveyor belt assembly are positioned at the outer sides of the lower test fixture assembly 40. As can be seen from the foregoing, in order to ensure that the lower test board body 41 protrudes from the base at a greater height than the tray conveying rail 30 during the mold clamping test, the lower test board body 41 may be greatly lowered at a height of the base when the thickness of the middle support portion of the lower test board body is very thin and both ends of the lower test board body 40 are located outside the lower test jig assembly 40, and the stroke of the first positioning guide rod 21 inserted into the second positioning hole 44 during the positioning process may be correspondingly shortened after the height is lowered, thereby improving the overall test efficiency.
The lower surface of the upper test fixture assembly 20 is provided with a second compression bar assembly 22 for pressing down the PCB board tray assembly 60, and the first compression bar assembly 17 is a compression bar assembly with an elastic structure, and the second compression bar assembly 22 is used for pressing the PCB board tray assembly 60 onto the lower test board main body 41, so as to ensure separation of the PCB board tray assembly from the PCB board 70; and the first compression bar assembly 17 is a compression bar assembly with an elastic structure, and after the conveyor belt assembly contacts the base of the lower test fixture assembly 40, the tray conveying track 30 is ensured not to be crushed in the process of continuously pressing down the servo driving assembly 10.
The lower test fixture assembly 40 can horizontally move relative to the frame 100, a rear test fixture 50 connected with the lower test fixture assembly 40 is further arranged in the frame 100, rotatable rotating shafts 51 are arranged on two sides of an end face of the rear test fixture 50 connected with the lower test fixture assembly 40, compression clamping jaws 52 are fixedly connected to the rotating shafts 51, and stress blocks 43 corresponding to the positions of the compression clamping jaws 52 are arranged on two sides of the end face of the lower test fixture assembly 40 connected with the rear test fixture assembly 50. In the process of testing different PCBs 70, different upper and lower test fixture assemblies need to be replaced, more than about one thousand probes are connected between the lower test fixtureand the rear test fixture, the compression force of each probe needs 3-5N, so that the whole pressing force needs thousands of newtons, direct pressing cannot be achieved in a limited space, the cylinder is used for driving the rotating shaft 51 to rotate, the pressing clamping jaw 52 is used for driving the stress block 43, and the upper and lower test fixture assemblies and the rear test fixture can be firmly contacted.
In summary, the full-automatic testing device for the PCB provided by the invention realizes the direct on-line testing of the tray assembly with the PCB, improves the productivity of equipment, reduces the risk of damage in the product transferring process, and reduces the occupied area of the equipment.
The foregoing has outlined and described the basic principles, 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, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The utility model provides a full-automatic testing arrangement of PCB circuit board, includes frame (100), its characterized in that: the rack (100) is provided with a tray conveying track (30) which can move up and down relative to the rack and is used for conveying a PCB tray assembly (60), the upper and lower sides of the tray conveying track (30) are respectively provided with an upper test clamp assembly (20) and a lower test clamp assembly (40), a servo driving assembly (10) used for driving the upper test clamp assembly (20) to move up and down is arranged above the upper test clamp assembly (20), wherein,
the upper test fixture assembly (20) includes an upper test board body contactable with a PCB (70) on the PCB tray assembly (60);
the lower test fixture assembly (40) comprises a base and a lower test board main body (41) protruding out of the base and capable of being contacted with a PCB (70) on the PCB tray assembly (60), the height of the lower test board main body (41) protruding out of the base is larger than that of the tray conveying track (30), and two conveying belt assemblies which are arranged in parallel of the tray conveying track (30) are positioned on the outer side of the lower test board main body (41);
the servo driving assembly (10) is provided with a first compression bar assembly (17) for synchronously pressing down the tray conveying track (30);
the two ends of the conveying belt assembly are respectively connected with a positioning block (312) and a connecting rod (31), the connecting rods (31) are connected with connecting blocks (34) which can move up and down relative to the connecting rods and are arranged on side plates (101) of the frame (100), return springs (35) are arranged at the parts of the connecting rods (31) above the connecting blocks (34), and limiting rods (311) for limiting the positioning blocks (312) are further arranged on the side plates (101);
the conveyer belt subassembly includes support (36), the side of support (36) is provided with extension board (39) along its length direction, the both ends of extension board (39) all are provided with guide pulley (38) that two dislocation were arranged respectively, and pass through conveyer belt after guide pulley (38) are spacing hugs closely the upper and lower surface of extension board (39), the one end of support (36) is provided with and is used for driving corresponding guide pulley (38) pivoted first servo motor (37), just the both ends of conveyer belt subassembly all are located the outside of lower test fixture subassembly (40).
2. The full-automatic testing device for a PCB circuit board according to claim 1, wherein: the side plate (101) is provided with a sliding rail (32), the connecting blocks (34) are connected to the sliding rail (32), one connecting block (34) located on the same side plate (101) can horizontally move relative to the sliding rail (32), and the frame (100) is provided with a screw rod assembly (33) for driving the connecting block (34) to horizontally move relative to the sliding rail (32).
3. The full-automatic testing device for a PCB circuit board according to claim 1, wherein: the two sides of the upper test board main body are provided with first positioning guide rods (21), and the bases of the PCB tray assembly (60) and the lower test fixture assembly (40) are respectively provided with first positioning holes (61) and second positioning holes (44) corresponding to the positions of the first positioning guide rods (21);
a second positioning guide post (42) is arranged on the lower test board main body (41), and a third positioning hole (72) corresponding to the second positioning guide post (42) in position is arranged on the PCB (70);
a third positioning guide column (62) which can be inserted into the PCB positioning hole is arranged in a PCB placing groove of the PCB tray assembly (60), and a plurality of limiting clamping blocks (63) are arranged at the edge of the PCB placing groove.
4. The full-automatic testing device for a PCB circuit board according to claim 1, wherein: the servo drive assembly (10) comprises a fixed seat (11) fixedly connected to the frame (100), a movable seat (14) connected to the lower side of the fixed seat (11) through a plurality of ball splines (13), two ball screw assemblies (15) are further arranged between the fixed seat (11) and the movable seat (14), a second servo motor (12) and a transfer drive gear assembly for synchronously driving the ball screw assemblies (15) are arranged on the fixed seat (11), and a slot (16) for inserting the upper test clamp assembly (20) is formed in the bottom of the movable seat (14).
5. The full-automatic testing device for a PCB of claim 4, wherein: the top of the upper test fixture assembly (20) is provided with a waist-shaped hole (23), and the bottom of the movable seat (14) is provided with a cylinder positioning column (19) which can be inserted into the waist-shaped hole (23); the bottom of the movable seat (14) is also provided with an error-proof positioning block (18), and the top of the upper test fixture assembly (20) is provided with an error-proof positioning groove corresponding to the error-proof positioning block (18) in shape and position.
6. The full-automatic testing device for a PCB circuit board according to claim 1, wherein: the lower surface of the upper test fixture assembly (20) is provided with a second compression bar assembly (22) for pressing down the PCB tray assembly (60), and the first compression bar assembly (17) is of an elastic structure.
7. The fully automatic testing device for a PCB of claim 6, wherein: the lower test fixture assembly (40) can horizontally move relative to the frame (100), a rear test fixture (50) connected with the lower test fixture assembly (40) is further arranged in the frame (100), rotatable rotating shafts (51) are arranged on two sides of the end face of the rear test fixture (50) connected with the lower test fixture assembly (40), compression clamping jaws (52) are fixedly connected to the rotating shafts (51), and stress blocks (43) corresponding to the positions of the compression clamping jaws (52) are arranged on two sides of the end face of the lower test fixture assembly (40) connected with the rear test fixture (50).
8. The full-automatic testing device for a PCB circuit board according to claim 1, wherein: an air cylinder positioning block (313) and a photoelectric sensor (314) are arranged on the outer side of the conveying belt assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311835313.4A CN117471293B (en) | 2023-12-28 | 2023-12-28 | Full-automatic testing device for PCB circuit board |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311835313.4A CN117471293B (en) | 2023-12-28 | 2023-12-28 | Full-automatic testing device for PCB circuit board |
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| CN117471293B true CN117471293B (en) | 2024-03-19 |
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|---|---|
| CN117471293A (en) | 2024-01-30 |
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