CN116774012A - ICT test fixture and testing arrangement - Google Patents
ICT test fixture and testing arrangement Download PDFInfo
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- CN116774012A CN116774012A CN202311025887.5A CN202311025887A CN116774012A CN 116774012 A CN116774012 A CN 116774012A CN 202311025887 A CN202311025887 A CN 202311025887A CN 116774012 A CN116774012 A CN 116774012A
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- 238000012360 testing method Methods 0.000 title claims abstract description 111
- 239000000523 sample Substances 0.000 claims abstract description 38
- 238000004891 communication Methods 0.000 claims abstract description 4
- 230000007246 mechanism Effects 0.000 claims description 58
- 238000007789 sealing Methods 0.000 claims description 28
- 238000009413 insulation Methods 0.000 claims description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- 210000001503 joint Anatomy 0.000 claims description 14
- 238000005485 electric heating Methods 0.000 claims description 12
- 238000007664 blowing Methods 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 8
- 239000000919 ceramic Substances 0.000 claims description 7
- 230000001502 supplementing effect Effects 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract 1
- 239000012528 membrane Substances 0.000 description 11
- 230000000007 visual effect Effects 0.000 description 9
- 238000005476 soldering Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
The invention belongs to the technical field of circuit board testing, and particularly relates to an ICT (information and communication technology) testing clamp and an ICT testing device. According to the invention, under the condition of ensuring the PCB test efficiency by a zoned continuous test mode, the distribution interval of the probes is increased, mutual interference is avoided, and before the test, the completely-unwelded soldered points on the PCB can be assisted to completely fall off, meanwhile, the virtual soldering test on the unopened soldered points can be improved based on a heat conduction test, so that the virtual soldering test of each test point can be synchronously completed in the process of testing the PCB, the test effect is good, the test of each test point can be carried out under the condition of extreme high temperature, the contact between the probes and the test points is stable enough, and the use effect is good.
Description
Technical Field
The invention belongs to the technical field of circuit board testing, and particularly relates to an ICT testing clamp and an ICT testing device.
Background
In order to ensure the quality of the PCB, the PCB needs to be tested in the production process of the PCB, which is mainly divided into an ICT test and an FCT test, wherein the ICT test mainly detects the open circuit, the short circuit, the missing part, and the like of the PCB.
At present, an ICT test fixture is one of the most important components in ICT test, and has the main function of stably clamping a PCB to be tested, ensuring that a probe can be aligned with each test point to ensure the normal running of subsequent tests and prevent erroneous judgment operation, such as a fixture for ICT test disclosed in patent publication No. CN 208043865U;
however, the existing fixture is mainly used for accurately clamping the PCB, better work cannot be provided for testing the PCB, when the electronic components on the PCB are welded and installed, the reasons for external greasy dirt, welding process errors and material self problems exist at the welding pins, the phenomenon of cold joint occurs at the welding points, cold joint points which are completely detached are easily found through ICT tests, but cold joint points which are not completely detached are not easily found through ICT tests, the possibility of partial point position detaching in the subsequent use process of the PCB is increased, the using effect of the PCB is affected, meanwhile, the existing ICT test fixture is used for testing all the points at one time, although the efficiency is improved, for the PCB with more testing points, the requirements on the diameter and the material of the probe are higher, the design and installation difficulty of the probe is higher, and the phenomenon of mutual interference is easy to occur.
Disclosure of Invention
The invention aims to solve the problems and provide an ICT test fixture and a test device.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the utility model provides an ICT test fixture, includes hollow foundation, the lateral wall of hollow foundation rotates and is connected with the rotary disk, the integrative shaping cover of lateral wall of hollow foundation is equipped with the supporting seat, and the supporting seat installs gear drive subassembly jointly with the rotary disk, the upper end integrated into one piece of rotary disk is provided with a plurality of chucks, and the terminal surface four corners department of each chuck all fixed mounting has the reference column, the terminal surface of rotary disk is located the inboard position of each chuck and all fixedly pegging graft there is frame-shaped sealing strip, and the terminal surface of rotary disk is located the inboard position of each frame-shaped sealing strip and all installs negative pressure blowing mechanism, the top of rotary disk is provided with a plurality of movable clamp frames, and the quantity of movable clamp frame is less than the quantity of chuck one and set up, each all the movable clamp frame is provided with the diaphragm jointly fixed between hollow foundation, each movable clamp frame's below four corners department all is provided with the clamping ring with reference column assorted, each clamping ring all installs pneumatic mechanism jointly with homonymy movable clamp frame.
Preferably, each negative pressure blowing mechanism comprises two vent pipes fixedly inserted into the end face of the rotary disk, the lower ends of the two vent pipes are fixedly communicated with hoses, the lower ends of the two hoses are fixedly communicated with butt joint pipes, the pipe walls of the butt joint pipes are fixedly inserted with movable iron blocks, and a group of elastic telescopic assemblies are jointly installed with the rotary disk.
Preferably, each pneumatic mechanism all includes the cavity of seting up in the inside four corners department of movable clamp frame, and has all offered the intercommunicating pore jointly between two adjacent cavities, each the inside of cavity is all provided with first piston in a sliding way, each the equal fixed mounting of upper end of clamping ring a set of slide bar, and each slide bar all with homonymy cavity sliding connection, each all be provided with a set of reset spring jointly between first piston and the homonymy cavity, each the top of slide bar all with the lower extreme fixed connection of first piston, one of them internally mounted of cavity has first pneumatic switch, one of them the cavity wall is located the fixed grafting in position of homonymy first piston top has the intake pipe, and the internally mounted of intake pipe has the air inlet solenoid valve.
The utility model provides a testing arrangement of ICT test fixture, includes the fixed electric putter who pegs graft in hollow base post inside, electric putter's output fixed mounting has the roof, the fixed a plurality of insulation boards that are provided with of lower extreme of roof, the quantity of insulation board is the same with the quantity setting of activity clamp frame, each the terminal surface of insulation board is all fixed to peg graft and is had a set of probe, each the equal fixedly connected with conductive rubber membrane of lower extreme of probe, each conductive rubber membrane is all installed heat conduction testing mechanism, annular cavity board has been cup jointed to the lateral wall of supporting seat fixedly, air feed mechanism is installed to annular cavity board, the top fixed mounting of roof has a plurality of bases corresponding with heat conduction testing mechanism position, and the inside of each base all installs with a set of heat conduction testing mechanism assorted trigger mechanism of homonymy, annular cavity board installs with each breather pipe assorted filling and inhaling mechanism, the top fixed mounting of roof has the controller.
Preferably, each heat conduction testing mechanism all includes a plurality of electric heating columns of fixed mounting in the rotary disk terminal surface, and each electric heating column all is located the inboard setting of homonymy frame sealing strip, each electric heating column all with controller electric connection, the outside fixed cover of electric conduction rubber membrane is equipped with the heat conduction pottery cover, and the outside wall of heat conduction pottery cover has fixedly cup jointed annular heat exchanger, and the inboard of annular heat exchanger is provided with the thermistor ring, the thermistor ring is located the outside fixed cover of heat conduction pottery cover and establishes.
Preferably, the air supply mechanism comprises an air pump fixedly arranged at the bottom of the supporting seat, the air pump is electrically connected with the controller, an output end of the air pump is fixedly communicated with the annular hollow plate together, a first air charging electromagnetic valve is arranged in the inner part of the air pipe, an air outlet pipe is fixedly inserted into the pipe wall of the air pipe, a first air suction electromagnetic valve is arranged in the inner part of the air outlet pipe, an air suction pipe is fixedly communicated with the annular hollow plate together, a second air suction electromagnetic valve is arranged in the inner part of the air suction pipe, an air supplementing pipe is fixedly inserted into the pipe wall of the air suction pipe, a second air charging electromagnetic valve is arranged in the inner part of the air supplementing pipe, the end face of the annular hollow plate is communicated with each air inlet pipe, and the first air charging electromagnetic valve, the first air suction electromagnetic valve, the second air charging electromagnetic valve and the second air suction electromagnetic valve are electrically connected with the controller.
Preferably, each triggering mechanism all includes and sets up in a plurality of air cavities of base inside, adjacent the round hole has been seted up jointly between the air cavity, and the inside of each round hole all installs first normally closed solenoid valve, each the inside of air cavity all slides and is provided with the second piston, and the second piston with the common fixedly connected with support spring of homonymy air cavity, each the top of air cavity all is fixed grafting has the blast pipe, and the inside of each blast pipe all installs the second normally closed solenoid valve, each the top of blast pipe all is fixed grafting has the hollow post, and the lateral wall of each hollow post all is fixed grafting has the second air pressure switch, each the exhaust hole all has been seted up at the top of hollow post, and the inside of each exhaust hole all installs with corresponding thermistor ring electric connection's exhaust solenoid valve, each the top of hollow post all is fixed mounting audible and visual annunciator, each the second air pressure switch all is through controller and audible and visual annunciator electric connection, one of the chamber wall and the annular air slab are fixed grafting jointly has the gas pipe, and the internally mounted of gas pipe has each normally closed solenoid valve, each the electromagnetic valve of second and the electromagnetic valve of the equal electric solenoid valve of the second air entrainment.
Preferably, the inflation and suction mechanism comprises two air suction pipes and an inflation pipe, wherein the two air suction pipes and the inflation pipe are fixedly inserted into the end face of the annular hollow plate and matched with the butt joint pipe, a third air suction electromagnetic valve is installed in the air suction pipe, a third air inflation electromagnetic valve is installed in the inflation pipe, a bump is arranged on the end face of the annular hollow plate in an integrated manner, an electromagnet is installed at the top of the bump, and the third air suction electromagnetic valve, the third air inflation electromagnetic valve and the electromagnet are electrically connected with the controller.
Preferably, each sealing hood is installed to the terminal surface of insulation board, and with group probe all be located the inboard setting of homonymy sealing hood, each sealing hood all has the connecting pipe with the common fixed intercommunication of an air cavity of homonymy, and the internally mounted of connecting pipe has the third normally closed solenoid valve, each sealing hood's interior top all is fixed grafting has the third air pressure switch, each the outside of probe all overlaps and is equipped with the seal cover, and the seal cover is located fixed setting between annular heat exchanger and the insulation board, the terminal surface of insulation board is located the position of each probe one side and has all been seted up first air vent, and the lateral wall of probe has been seted up with the second air vent that homonymy conductive rubber membrane is linked together, each third normally closed solenoid valve and third air pressure switch all with controller electric connection.
Compared with the prior art, the ICT test fixture and the test device have the advantages that:
through the hollow foundation post, the rotary disk that sets up, the supporting seat, gear drive subassembly, the chuck, the reference column, the activity presss from both sides the frame, the diaphragm, clamping ring and pneumatic mechanism's mutually support, through the relative rotatory design of a plurality of chucks and activity clamp frame, can carry out the ICT test of PCB board in succession through the mode of subregion continuous test, when guaranteeing test efficiency, increase the probe and distribute the interval, reduce the probe design and the equipment degree of difficulty, avoid the mutual interference, and through the mutually support of negative pressure blowing mechanism and the frame sealing strip that sets up, can utilize anchor clamps to carry out prosthetic negative pressure and pressure boost to the PCB board before testing, make the unstable spot of soldering desoldering in advance, do benefit to subsequent test.
Through the mutually supporting of electric putter, roof, insulation board, probe, conductive rubber mould and the controller that set up, can test the circuit of PCB board through the probe, and through annular cavity board, the air feed mechanism that set up, can cooperate negative pressure blowing mechanism and the mechanism that fills that sets up carry out repetitive negative pressure and pressure boost to the PCB board, and air feed mechanism cooperation pneumatic mechanism can provide the power of sticising for the clamping ring.
Through the mutual cooperation of the heat conduction testing mechanism, the base and the triggering mechanism, the heat conduction testing can be carried out on each test point, the incomplete soldering test can be further carried out on each test point, so that the accuracy of the virtual soldering test can be further improved, the removal of the virtual soldering point of the PCB can be effectively improved, and each test point can be tested at the limiting temperature through the heat conduction test, and the working performance of the PCB at the limiting temperature can be tested.
Through the mutually supporting of sealed aircraft bonnet, connecting pipe, third normally closed solenoid valve, third air pressure switch, seal cover, first air vent and second air vent that set up, can be when probe and test point contact, the conductive rubber membrane of cooperation setting makes the tip and the test point cladding of probe stable, and the cladding is comprehensive, improves the stability of probe test.
Drawings
FIG. 1 is a schematic view of an ICT test fixture according to the present invention;
FIG. 2 is a schematic top view of a rotary disk of an ICT test fixture according to the present invention;
FIG. 3 is a schematic top view of a movable clamping frame of an ICT test fixture according to the present invention;
FIG. 4 is a schematic cross-sectional view of a movable clamping frame of an ICT test fixture according to the present invention;
FIG. 5 is a schematic diagram of a test device of an ICT test fixture according to the present invention;
FIG. 6 is a schematic view of a connection structure between an annular hollow plate and a chuck of a testing device of an ICT testing fixture provided by the invention;
FIG. 7 is a schematic diagram of the structure of a probe of a testing device of an ICT testing fixture provided by the invention;
FIG. 8 is a schematic diagram of a trigger mechanism of a test device of an ICT test fixture according to the present invention;
FIG. 9 is a schematic top view of a top plate of a testing device of an ICT testing fixture according to the present invention;
fig. 10 is a schematic top view of an annular hollow plate of a test device of an ICT test fixture according to the present invention.
In the figure: 1 hollow base column, 2 rotary disk, 3 supporting seat, 4 chuck, 5 positioning column, 6 frame type sealing strip, 7 negative pressure blowing mechanism, 701 vent pipe, 702 hose, 703 butt joint pipe, 704 movable iron block, 705 elastic telescopic component, 8 movable clamping frame, 9 transverse plate, 10 compression ring, 11 pneumatic mechanism, 111 cavity, 112 communication hole, 113 first piston, 114 slide rod, 115 return spring, 116 first pneumatic switch, 117 air inlet pipe, 118 air inlet electromagnetic valve, 12 gear driving component, 13 electric push rod, 14 top plate, 15 insulating plate, 16 probe, 17 conductive rubber film, 18 heat conduction testing mechanism, 181 electric heating column, 182 heat conduction ceramic sleeve, 183 annular heat insulation cover, 184 heat sensitive resistance ring, 19 annular hollow plate, 20 air supply mechanism, 201 air pump, 202 air supply pipe, 203 air outlet pipe, 204 first air charging electromagnetic valve 205 first bleed solenoid valve, 206 suction tube, 207 second bleed solenoid valve, 208 air make-up tube, 209 second inflation solenoid valve, 21 base, 22 trigger mechanism, 221 air cavity, 222 round hole, 223 first normally closed solenoid valve, 224 second piston, 225 support spring, 226 exhaust tube, 227 second normally closed solenoid valve, 228 hollow column, 229 second air pressure switch, 23 suction mechanism, 231 suction tube, 232 air inflation tube, 233 third bleed solenoid valve, 234 third inflation solenoid valve, 235 bump, 236 electromagnet, 24 controller, 25 exhaust solenoid valve, 26 audible and visual alarm, 27 air add tube, 28 air add solenoid valve, 29 sealed hood, 30 connecting tube, 31 third normally closed solenoid valve, 32 third air pressure switch, 33 seal cartridge, 34 first vent, 35 second vent.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
As shown in fig. 1-10, an ICT test fixture, including hollow base 1, the lateral wall rotation of hollow base 1 is connected with rotary disk 2, the integrative shaping cover of lateral wall of hollow base 1 is equipped with supporting seat 3, and supporting seat 3 installs gear drive subassembly 12 jointly with rotary disk 2, the upper end integrated into one piece of rotary disk 2 is provided with a plurality of chucks 4, and the terminal surface four corners department of each chuck 4 all installs reference column 5, the terminal surface of rotary disk 2 is located the inboard position of each chuck 4 and all fixedly inserts frame sealing strip 6, and the terminal surface of rotary disk 2 is located the inboard position of each frame sealing strip and all installs negative pressure blowing mechanism 7, each negative pressure blowing mechanism 7 all includes two breather pipes 701 of fixedly inserting in rotary disk 2 terminal surface, the lower extreme of two breather pipes 701 all fixedly communicates with hose 702, and the lower extreme of two hose 702 all fixedly communicates with butt joint pipe 703, the pipe wall of two butt joint pipes 703 is fixedly inserting together and is equipped with movable iron 704, movable iron 704 and telescopic member 2 jointly installs a set of elasticity telescopic assembly 705, elasticity telescopic member 705, elasticity assembly 705 includes the rotary disk and rotary disk, T shape and fixed spring 704 are fixed in the bottom of T shape and movable spring 704, make movable spring 704 slide back to move.
The upper side of rotary disk 2 is provided with a plurality of movable clamp frames 8, and the quantity of movable clamp frames 8 is one setting less than the quantity of chuck 4, all be fixed together and be provided with diaphragm 9 between each movable clamp frame 8 and the hollow foundation column 1, all be provided with the clamping ring 10 with reference column 5 assorted below four corners department of each movable clamp frame 8, each clamping ring 10 installs pneumatic mechanism 11 jointly with homonymy movable clamp frame 8, each pneumatic mechanism 11 is including seting up in the cavity 111 of movable clamp frame 8 inside four corners department, and all offered the intercommunicating pore 112 jointly between two adjacent cavities 111, the inside of each cavity 111 all slides and is provided with first piston 113, the upper end of each clamping ring 10 is a set of slide bar 114 of fixed mounting, and each slide bar 114 all is with homonymy cavity 111 sliding connection, all fixed together are provided with a set of reset spring 115 between each first piston 113 and the homonymy cavity 111, the top of each 114 all is fixed connection with the lower extreme of first piston 113, the internally mounted of one of cavity 111 has first pneumatic switch 116, the inside of one of cavity 111 is located the inside first piston 113 of homonymy upper position, and the air inlet pipe 113 is fixed with the first piston 113, and the inside of air inlet pipe 118 is equipped with a solenoid valve 118, the inside is opened to the inside of each slide valve 118, the inside is driven by the air inlet pipe is opened to the inside of each slide valve 113.
The utility model provides a testing arrangement of ICT test fixture, including fixed grafting in the inside electric putter 13 of hollow foundation column 1, electric putter 13's output fixed mounting has roof 14, roof 14's the fixed a plurality of insulation boards 15 that are provided with in lower extreme, the quantity of insulation board 15 is the same with the quantity of activity clamp frame 8 sets up, the terminal surface of each insulation board 15 all is fixed grafting has a set of probe 16, the equal fixedly connected with conducting rubber membrane 17 of lower extreme of each probe 16, heat conduction testing mechanism 18 is all installed to each conducting rubber membrane 17, each heat conduction testing mechanism 18 all includes a plurality of electric heating columns 181 of fixed mounting in rotary disk 2 terminal surface, and each electric heating column 181 all is located the inboard setting of homonymy frame shape sealing strip, each electric heating column 181 all with controller 24 electric connection, the outside fixed cover of conducting rubber membrane 17 is equipped with heat conduction ceramic sleeve 182, and the outside wall fixed sleeve of heat conduction ceramic sleeve 182 has annular heat-proof housing 183, and the inboard of annular heat-proof housing 183 is provided with temperature resistance ring 184, temperature in the heat conduction ceramic sleeve 182 is fixed the cover, the temperature in the temperature resistance ring 184 is risen, its self resistance value is lowered, the insulating column 181 adopts insulating material for insulating column 181.
The annular hollow plate 19 is fixedly sleeved on the outer side wall of the supporting seat 3, the air supply mechanism 20 is installed on the annular hollow plate 19, the air supply mechanism 20 comprises an air pump 201 fixedly installed at the bottom of the supporting seat 3, the air pump 201 is electrically connected with a controller 24, an output end of the air pump 201 is fixedly communicated with an air pipe 202 jointly, a first air charging electromagnetic valve 204 is installed inside the air pipe 202, an air outlet pipe 203 is fixedly inserted into the pipe wall of the air pipe 202, a first air charging electromagnetic valve 205 is installed inside the air outlet pipe 203, an air suction pipe 206 is fixedly communicated with the air pump 201 jointly in the annular hollow plate 19, a second air charging electromagnetic valve 207 is installed inside the air suction pipe 206, an air supplementing pipe 208 is fixedly inserted into the pipe wall of the air suction pipe 206, a second air charging electromagnetic valve 209 is installed inside the air supplementing pipe 208, the end face of the annular hollow plate 19 is communicated with each air inlet pipe 117, and the first air charging electromagnetic valve 204, the first air charging electromagnetic valve 205, the second air charging electromagnetic valve 209 and the second air charging electromagnetic valve 207 are electrically connected with the controller 24 respectively, and air supply can be carried out inside the annular hollow plate 19 through the air pump 201.
The top of the top plate 14 is fixedly provided with a plurality of bases 21 corresponding to the positions of the heat conduction testing mechanisms 18, the inside of each base 21 is provided with a triggering mechanism 22 matched with one group of heat conduction testing mechanisms 18 at the same side, each triggering mechanism 22 comprises a plurality of air cavities 221 arranged in the base 21, round holes 222 are commonly arranged between adjacent air cavities 221, the inside of each round hole 222 is provided with a first normally closed electromagnetic valve 223, the inside of each air cavity 221 is slidingly provided with a second piston 224, the second piston 224 and the air cavities 221 at the same side are commonly fixedly connected with a supporting spring 225, the top of each air cavity 221 is fixedly connected with an exhaust pipe 226, the inside of each exhaust pipe 226 is provided with a second normally closed electromagnetic valve 227, the top of each exhaust pipe 226 is fixedly connected with a hollow column 228, the side wall of each hollow column 228 is fixedly connected with a second air pressure switch 229, the top of each hollow column 228 is provided with an exhaust hole, the inside of each exhaust hole is provided with an exhaust electromagnetic valve 25 electrically connected with a corresponding thermosensitive resistor ring 184, the top of each hollow column 228 is fixedly provided with an audible and visual alarm 26, each second air pressure switch 229 is electrically connected with the audible and visual alarm 26 through a controller 24, the cavity wall of one air cavity 221 and the annular hollow plate 19 are fixedly inserted with an air adding pipe 27 together, the inside of the air adding pipe 27 is provided with an air adding electromagnetic valve 28, each first normally closed electromagnetic valve 223, each second normally closed electromagnetic valve 227 and the air adding electromagnetic valve 28 are electrically connected with the controller 24, a certain gap is kept between the audible and visual alarm 26 and the exhaust hole on the same side to avoid influencing the normal exhaust of the exhaust hole, after the audible and visual alarm 26 is electrified to work, the audible and visual alarm prompt can be sent out, therefore, personnel can know that the corresponding test point has the cold joint defect conveniently and accurately.
The annular hollow plate 19 is provided with a charging mechanism 23 matched with each breather pipe 701, the charging mechanism 23 comprises an air suction pipe 231 and an air charging pipe 232 which are fixedly inserted into the end face of the annular hollow plate 19 and matched with a butt joint pipe 703, a third air suction electromagnetic valve 233 is arranged in the air suction pipe 231, a third air charging electromagnetic valve 234 is arranged in the air charging pipe 232, a bump 235 is integrally formed on the end face of the annular hollow plate 19, an electromagnet 236 is arranged at the top of the bump 235, the third air suction electromagnetic valve 233, the third air charging electromagnetic valve 234 and the electromagnet 236 are electrically connected with the controller 24, and after the electromagnet 236 is electrified, magnetic attraction can be generated and the corresponding movable iron block 704 is adsorbed to move downwards.
The top of roof 14 fixed mounting has controller 24, wherein the bottom of annular cavity board 19 is provided with the venthole, and the internally mounted of venthole has the automatically controlled valve, automatically controlled valve is controlled by controller 24, be used for discharging the inside unnecessary air of annular cavity board 19, sealed aircraft bonnet 29 is all installed to the terminal surface of each insulation board 15, and the inboard setting that is located same side sealed aircraft bonnet 29 with group probe 16, each sealed aircraft bonnet 29 all is with same side an air cavity 221 jointly fixed intercommunication has connecting pipe 30, and the internally mounted of connecting pipe 30 has third normally closed solenoid valve 31, the interior top of each sealed aircraft bonnet 29 all fixedly peg graft third air pressure switch 32, the outside of each probe 16 all overlaps and is equipped with seal cover 33, and seal cover 33 is located fixed setting between annular heat exchanger 183 and the insulation board 15, the terminal surface of insulation board 15 is located the position of each probe 16 side all offered first air vent 34, and the lateral wall of probe 16 has seted up the second air vent 35 that is linked together with same side conductive rubber membrane 17, each third normally closed solenoid valve 31 and third air pressure switch 32 all are connected with controller 24 electrical connection, can make conductive membrane 17 inflation rubber inflation contact steadily to inflation rubber membrane 17 through to inside the sealed aircraft bonnet 29.
The principle of operation of the present invention will now be described as follows: the mounting holes on the outer edge of the PCB to be tested are sleeved on the positioning posts 5 on the corresponding chucks 4, the initial mounting of the PCB can be completed, then, the controller 24 is started, the gear driving assembly 12 is controlled by the controller 24 to drive the rotating disc 2 to rotate for a certain angle every 2 minutes, after the rotating disc 2 rotates once, the controller 24 controls the air pump 201, the first air charging electromagnetic valve 204 arranged in the air delivery pipe 202 and the second air charging electromagnetic valve 209 arranged in the air supplementing pipe 208 to work in an electrifying manner, and controls the air inlet electromagnetic valve 118 in each air inlet pipe 117 to be electrified and opened, at the moment, the air delivered by the air pump 201 can enter the cavities 111 respectively through the annular hollow plates 19, each air inlet pipe 117 and the communication holes 112 between the two adjacent cavities 111, under the action of air pressure pushing, the first pistons 113 in the cavities 111 can be pushed to move downwards to match with the slide bars 114, the pressing rings 10 can be driven to move downwards, so that the PCB to be tested can be pressed and fixed, after the air inlet electromagnetic valves 118 work for 5 seconds, the controller 24 controls the air inlet electromagnetic valves 118 to be powered off and closed, then, the controller 24 controls the electromagnets 236 to work, the electromagnets 236 can absorb the corresponding movable iron blocks 704, so that the two butt joint pipes 703 can be driven to move downwards to butt joint the air suction pipe 231 and the air charging pipe 232, meanwhile, the controller 24 controls the third air charging electromagnetic valve 234 installed inside the air charging pipe 232 to be powered on and opened, at the moment, air conveyed by the air pump 201 enters the corresponding frame-shaped sealing strip 6 through the air conveying pipe 202, the annular hollow plate 19, the air charging pipe 232, the butt joint pipe 703, the hose 702 and the air pipe 701, under the elastic telescopic action of the frame-shaped sealing strip 6, the tightness between the frame-shaped sealing strip 6 and the PCB can be maintained, and through the air charging action, the air pressure on the lower side of the PCB can be increased, the PCB can be slightly and upwards arched under the state that the compression rings 10 compress the PCB, the air in the frame-type sealing strip 6 can be sucked out through the air pipe 701, the hose 702, the butt joint pipe and the suction pipe 206 at the suction end of the air pump 201, the air in the frame-type sealing strip 6 can be discharged through the air outlet pipe 203 on the air pipe 202 after the first air-charging electromagnetic valve 204, the second air-charging electromagnetic valve 209 and the third air-charging electromagnetic valve 234 which are arranged in the air outlet pipe 203 work for 3 seconds, the controller 24 can immediately close the first air-charging electromagnetic valve 204, the second air-charging electromagnetic valve 209 and the third air-charging electromagnetic valve 234, synchronously controls the first air-charging electromagnetic valve 205, the second air-charging electromagnetic valve 207 which are arranged in the air outlet pipe 203 and the third air-charging electromagnetic valve 233 to work for 3 seconds, and the air suction end of the air pump 201 can be repeatedly welded to the PCB at the time when the first air-charging electromagnetic valve 205, the second air-charging electromagnetic valve 207 and the third air-charging electromagnetic valve 231 are not completely welded to the PCB at the same time, and the PCB can not be completely welded at the same time when the first air-charging electromagnetic valve 207 and the third air-charging electromagnetic valve 231 are completely opened for 3 seconds, and the air-charging electromagnetic valve 209 and the PCB can not be completely welded to the next time completely and the PCB can be completely opened;
the controller 24 controls each electric heating column 181 to work and controls the electric push rod 13 to drive the top plate 14 to move downwards, at the moment, each group of probes 16 can synchronously move downwards under the action of the top plate 14, the electric push rod 13 is powered off after working for 2 seconds at regular time, then the air-filling electromagnetic valve 28 in the air-filling pipe 27 and the first normally-closed electromagnetic valve 223 in each round hole 222 as well as the third normally-closed electromagnetic valve 31 in the connecting pipe 30 are opened under the action of the controller 24, the controller 24 controls the first air-filling electromagnetic valve 204 arranged in the air-filling pipe 202 and the second air-filling electromagnetic valve 209 arranged in the air-filling pipe 208 to work, at the moment, the air conveyed by the air pump 201 enters each sealing hood 29 through the annular hollow plate 19, the air-filling pipe 27, the air cavity 221, the round holes 222 and the connecting pipe 30, then, air enters each conductive rubber film 17 through the first vent hole 34 and the second vent hole 35, each conductive rubber film 17 is expanded, the conductive rubber film 17 and a corresponding test point are covered by stable contact, the third air pressure switch 32 in the sealing hood 29 is automatically triggered along with the increase of air pressure, after the controller 24 receives an electric signal of the third air pressure switch 32, the controller 24 controls the third normally-closed electromagnetic valve 31 in the connecting pipe 30 to be closed in a power-off mode, at the moment, air enters each air cavity 221, so that the second piston 224 in the air cavity 221 can be pushed to move downwards, and after the controller 24 receives the electric signal of the third air pressure switch 32, the controller 24 opens the electromagnetic valve 28 in the air adding pipe 27 and the first normally-closed electromagnetic valve 223 in each round hole 222 at a timing of 5 seconds;
and when each electric heating column 181 works, the lower side of each test point of the PCB board is heated, the heated temperature is transferred to the thermosensitive resistor ring 184 at the probe 16 through the PCB board and the soldering point, at this time, the controller 24 turns on the connection loop of the thermosensitive resistor ring 184 and the exhaust electromagnetic valve 25 and synchronously starts the second normally closed electromagnetic valve 227 in the exhaust pipe 226, if the soldering is full, the heat transfer speed is high, the thermosensitive resistor ring 184 has high heat transfer speed and high temperature, so that the resistance value of the thermosensitive resistor ring 184 can be reduced, the current flowing into the exhaust electromagnetic valve 25 can be increased, at this time, the opening degree of the exhaust electromagnetic valve 25 is increased along with the current, so the air discharged through the exhaust pipe 226 can be rapidly discharged through the exhaust electromagnetic valve 25, if the soldering point has the phenomenon of insufficient soldering, the heat transfer area is reduced, the resistance value of the corresponding thermosensitive resistor ring 184 is higher, the corresponding exhaust electromagnetic valve 25 is opened to a smaller degree, the air discharge amount is smaller, so the air pressure in the corresponding hollow column 228 can be rapidly increased until the second air pressure switch 229 is triggered by the air pressure, at the moment, the corresponding audible and visual alarm 26 alarms, which indicates that the insufficient soldering phenomenon exists, and meanwhile, the PCB can be tested through the conductive rubber films 17 and the probes 16;
and after the first rotation of the rotating disc 2, the worker can install the next PCB board to be tested on the corresponding chuck 4, and at the same time, after the first rotation of the rotating disc 2 and after the first test of the first installed PCB board, the controller 24 controls the air inlet solenoid valves 118 inside the air inlet pipes 117 to open for 3 seconds again, at this time, the air inside the cavity 111 flows back into the annular hollow plate 19 through the air inlet pipes 117, at this time, under the action of the return springs 115 inside the cavity 111, the first piston 113 drives the pressing ring 10 to move upwards to separate from the positioning column 5, and then, the controller 24 controls the rotating disc 2 to rotate again by a certain angle, that is, the first installed PCB board rotates to the next set of probes 16, and then, the above operation can be continued until the PCB board is tested by the sets of probes 16.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (9)
1. The ICT test fixture comprises a hollow base column (1), and is characterized in that the outer side wall of the hollow base column (1) is rotationally connected with a rotary disk (2), a supporting seat (3) is sleeved on the outer side wall of the hollow base column (1) in an integrated mode, a gear driving assembly (12) is jointly installed on the supporting seat (3) and the rotary disk (2), a plurality of chucks (4) are integrally formed at the upper end of the rotary disk (2), positioning columns (5) are fixedly installed at four corners of the end face of each chuck (4), frame-shaped sealing strips (6) are fixedly inserted at positions, which are positioned at the inner sides of the chucks (4), of the end face of the rotary disk (2), negative pressure blowing mechanisms (7) are installed at positions, which are positioned at the inner sides of the frame-shaped sealing strips, of the rotary disk (2), a plurality of movable clamping frames (8) are arranged above the rotary disk, the quantity of the movable clamping frames (8) is one less than that of the chucks (4), a plurality of plates (9) are fixedly arranged between the movable clamping frames (8) and the hollow base column (1), the positions of the movable clamping frames are matched with the four corners (8) respectively, the pressure rings (10) and the movable clamping frames (8) at the same side are provided with air pressure mechanisms (11) together.
2. An ICT test fixture according to claim 1, characterized in that each negative pressure blowing mechanism (7) comprises two vent pipes (701) fixedly inserted into the end face of the rotating disc (2), the lower ends of the two vent pipes (701) are fixedly communicated with hoses (702), the lower ends of the two hoses (702) are fixedly communicated with butt joint pipes (703), the pipe walls of the two butt joint pipes (703) are fixedly inserted with movable iron blocks (704), and the movable iron blocks (704) and the rotating disc (2) are jointly provided with a group of elastic telescopic assemblies (705).
3. An ICT test fixture according to claim 2, characterized in that each air pressure mechanism (11) comprises a cavity (111) formed at four corners inside the movable clamping frame (8), communication holes (112) are formed between two adjacent cavities (111) together, a first piston (113) is slidably arranged inside each cavity (111), a group of sliding rods (114) are fixedly arranged at the upper end of each compression ring (10), each sliding rod (114) is slidably connected with the cavity (111) at the same side, a group of return springs (115) are fixedly arranged between each first piston (113) and the cavity (111) at the same side together, the top of each sliding rod (114) is fixedly connected with the lower end of the first piston (113), a first air pressure switch (116) is arranged inside one cavity (111), an air inlet pipe (117) is fixedly inserted in the position of the cavity wall of one cavity (111) above the first piston (113) at the same side, and an electromagnetic valve (118) is arranged inside the air inlet pipe (117).
4. The test device of the ICT test fixture according to any one of claims 1-3, which is characterized by comprising an electric push rod (13) fixedly inserted into a hollow base column (1), wherein a top plate (14) is fixedly arranged at the output end of the electric push rod (13), a plurality of insulating plates (15) are fixedly arranged at the lower end of the top plate (14), a plurality of bases (21) corresponding to the positions of the heat conducting test mechanisms (18) are fixedly arranged at the lower end of the top plate (14), a group of probes (16) are fixedly inserted into the end faces of the insulating plates (15), a conductive rubber film (17) is fixedly connected to the lower end of each probe (16), a heat conducting test mechanism (18) is fixedly arranged at each conductive rubber film (17), an annular hollow plate (19) is fixedly sleeved on the outer side wall of the supporting seat (3), a gas supply mechanism (20) is arranged at the top of the top plate (14), a plurality of bases (21) corresponding to the positions of the heat conducting test mechanisms (18) are fixedly arranged in the inner parts of the bases (21), a group of probes (16) are fixedly connected with a conductive rubber film (17) fixedly connected to the lower end of the heat conducting test mechanism (17), a plurality of vent pipes (23) are arranged on the same side of the heat conducting test mechanisms (18), and the vent pipes (23) are matched with the hollow plates (19), a controller (24) is fixedly arranged at the top of the top plate (14).
5. The device for testing the ICT test fixture according to claim 4, wherein each heat conduction testing mechanism (18) comprises a plurality of electric heating columns (181) fixedly mounted on the end face of the rotary disk (2), each electric heating column (181) is located on the inner side of the same-side frame-shaped sealing strip, each electric heating column (181) is electrically connected with the controller (24), a heat conduction ceramic sleeve (182) is fixedly sleeved on the outer side of the conductive rubber film (17), an annular heat insulation cover (183) is fixedly sleeved on the outer side wall of the heat conduction ceramic sleeve (182), a heat-sensitive resistance ring (184) is arranged on the inner side of the annular heat insulation cover (183), and the heat-sensitive resistance ring (184) is fixedly sleeved on the outer side of the heat conduction ceramic sleeve (182).
6. The device for testing the ICT test fixture according to claim 4, wherein the air supply mechanism (20) comprises an air pump (201) fixedly mounted at the bottom of the supporting seat (3), the air pump (201) is electrically connected with the controller (24), an output end of the air pump (201) is fixedly connected with an air pipe (202) together with the annular hollow plate (19), a first air charging electromagnetic valve (204) is mounted inside the air pipe (202), an air outlet pipe (203) is fixedly connected with a pipe wall of the air pipe (202) in a plugging manner, a first air discharging electromagnetic valve (205) is mounted inside the air outlet pipe (203), an output end of the air pump (201) is fixedly connected with a suction pipe (206) together with the annular hollow plate (19), a second air discharging electromagnetic valve (207) is mounted inside the suction pipe (206), an air supplementing pipe (208) is fixedly plugged inside the pipe wall of the air supplementing pipe (208), an end face of the annular hollow plate (19) is connected with each air inlet pipe (117) in a setting manner, and the first air discharging electromagnetic valve (205), the first air discharging electromagnetic valve (24) and the second air charging electromagnetic valve (207) are electrically connected with the first air discharging electromagnetic valve (209).
7. The device of claim 5, wherein each triggering mechanism (22) comprises a plurality of air chambers (221) formed in the base (21), round holes (222) are formed between adjacent air chambers (221), first normally closed electromagnetic valves (223) are mounted in the round holes (222), second pistons (224) are slidably arranged in the air chambers (221), the second pistons (224) and the air chambers (221) on the same side are fixedly connected with supporting springs (225), exhaust pipes (226) are fixedly connected to the tops of the air chambers (221), second normally closed electromagnetic valves (227) are mounted in the air chambers (226), hollow columns (228) are fixedly connected to the tops of the exhaust pipes (226), second air pressure switches (229) are fixedly connected to the side walls of the hollow columns (228), exhaust holes are formed in the tops of the hollow columns (228), a corresponding heat-sensitive resistor ring (184) is mounted in the air chambers, the acoustic and optical alarms (26) are electrically connected to the air pressure alarms (26) through the second air pressure switches (24), the cavity wall of one air cavity (221) and the annular hollow plate (19) are fixedly inserted with an air adding pipe (27), an air adding electromagnetic valve (28) is arranged in the air adding pipe (27), and each first normally closed electromagnetic valve (223), each second normally closed electromagnetic valve (227) and the air adding electromagnetic valve (28) are electrically connected with the controller (24).
8. The device for testing the ICT test fixture according to claim 4, wherein the inflating and sucking mechanism (23) comprises two air suction pipes (231) and an air charging pipe (232) which are fixedly inserted into the end face of the annular hollow plate (19) and matched with the butt joint pipe (703), a third air suction electromagnetic valve (233) is installed in the air suction pipe (231), a third air charging electromagnetic valve (234) is installed in the air charging pipe (232), a lug (235) is arranged on the end face of the annular hollow plate (19) in an integrated manner, an electromagnet (236) is installed at the top of the lug (235), and the third air suction electromagnetic valve (233), the third air charging electromagnetic valve (234) and the electromagnet (236) are electrically connected with the controller (24).
9. The device for testing the ICT test fixture according to claim 7, wherein the end faces of the insulating plates (15) are respectively provided with a sealing hood (29), the probes (16) of the same group are respectively located at the inner sides of the sealing hoods (29) of the same side, the sealing hoods (29) are respectively fixedly communicated with a connecting pipe (30) together with an air cavity (221) of the same side, a third normally closed electromagnetic valve (31) is arranged in the connecting pipe (30), a third air pressure switch (32) is fixedly inserted into the inner top of the sealing hoods (29), sealing sleeves (33) are respectively sleeved at the outer sides of the probes (16), the sealing sleeves (33) are fixedly arranged between the annular heat insulation hoods (183) and the insulating plates (15), the positions of the end faces of the insulating plates (15) located at one side of the probes (16) are respectively provided with a first vent hole (34), the side wall of each probe (16) is provided with a second vent hole (35) communicated with a conductive rubber film (17) of the same side, and the third normally closed electromagnetic valve (31) and the third air pressure switch (32) are electrically connected with the air pressure controller (24).
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| CN202311025887.5A CN116774012B (en) | 2023-08-15 | 2023-08-15 | ICT test fixture and testing arrangement |
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| CN202311025887.5A CN116774012B (en) | 2023-08-15 | 2023-08-15 | ICT test fixture and testing arrangement |
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Cited By (4)
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| CN117074926A (en) * | 2023-10-16 | 2023-11-17 | 深圳市微特精密科技股份有限公司 | Quick positioner of FCT test fixture |
| CN117129841A (en) * | 2023-10-26 | 2023-11-28 | 深圳市微特精密科技股份有限公司 | ICT test fixture device that opens and shuts |
| CN117269561A (en) * | 2023-11-21 | 2023-12-22 | 苏州联讯仪器股份有限公司 | Clamp for wafer test |
| CN117640482A (en) * | 2024-01-26 | 2024-03-01 | 陕西恒光测控技术有限公司 | Communication module testing arrangement |
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Cited By (8)
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| CN117074926A (en) * | 2023-10-16 | 2023-11-17 | 深圳市微特精密科技股份有限公司 | Quick positioner of FCT test fixture |
| CN117074926B (en) * | 2023-10-16 | 2024-01-02 | 深圳市微特精密科技股份有限公司 | Quick positioner of FCT test fixture |
| CN117129841A (en) * | 2023-10-26 | 2023-11-28 | 深圳市微特精密科技股份有限公司 | ICT test fixture device that opens and shuts |
| CN117129841B (en) * | 2023-10-26 | 2024-01-09 | 深圳市微特精密科技股份有限公司 | ICT test fixture device that opens and shuts |
| CN117269561A (en) * | 2023-11-21 | 2023-12-22 | 苏州联讯仪器股份有限公司 | Clamp for wafer test |
| CN117269561B (en) * | 2023-11-21 | 2024-02-06 | 苏州联讯仪器股份有限公司 | Clamp for wafer test |
| CN117640482A (en) * | 2024-01-26 | 2024-03-01 | 陕西恒光测控技术有限公司 | Communication module testing arrangement |
| CN117640482B (en) * | 2024-01-26 | 2024-04-05 | 陕西恒光测控技术有限公司 | Communication module testing arrangement |
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