CN114755566A - Three-dimensional load-shifting type circuit board aging test machine - Google Patents
Three-dimensional load-shifting type circuit board aging test machine Download PDFInfo
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- CN114755566A CN114755566A CN202210673922.3A CN202210673922A CN114755566A CN 114755566 A CN114755566 A CN 114755566A CN 202210673922 A CN202210673922 A CN 202210673922A CN 114755566 A CN114755566 A CN 114755566A
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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
- G01R31/2832—Specific tests of electronic circuits not provided for elsewhere
- G01R31/2836—Fault-finding or characterising
- G01R31/2849—Environmental or reliability testing, e.g. burn-in or validation tests
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
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- 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
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0023—Bending
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- Tests Of Electronic Circuits (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The application relates to the technical field of circuit board aging tests, in particular to a three-dimensional moving-type circuit board aging test machine which comprises a test box, wherein the front end of the test box is hinged with a box door made of transparent glass, a heating device which is used for heating a circuit board and has adjustable temperature and a cooling device which is used for rapidly cooling the circuit board are arranged in the test box, and a clamping and turning device and a strength test device are arranged in the test box; the aging test device can be used for aging tests of circuit boards of different specifications, the clamping unit can clamp and fix the circuit boards of different specifications by specifically controlling the movement of the overturning turntable through the spacing adjusting mechanism and the first hydraulic cylinder, and meanwhile, the circuit boards in the test box can be overturned simultaneously, so that the circuit boards are uniformly heated, and the accuracy of the aging test of the circuit boards is improved.
Description
Technical Field
The application relates to the technical field of circuit board aging tests, in particular to a three-dimensional moving type circuit board aging test machine.
Background
The aging of the circuit board is that after the circuit board works for a certain time after being electrified under a certain condition, some element parameters on the circuit board change, the change is related to the use time of the circuit board, which is absolutely not allowed for circuit boards with special purposes, so that a plurality of circuit boards are subjected to anti-aging treatment and aging test before leaving factories to ensure that the circuit board can be used for a long time and can still stably run in a severe environment.
Among the prior art as open a circuit board high temperature aging testing case that CN213240409U provided, the power distribution box comprises a box body, the inside activity joint of box has the installing frame, the bottom surface fixedly connected with bottom suspension fagging of installing frame, the draw-in groove has been seted up to the top surface of bottom suspension fagging, the bottom surface of bottom suspension fagging is seted up threaded hole, the internal surface screw thread of screw hole has cup jointed the bolt, the top surface fixedly connected with roof of installing frame. This circuit board high temperature aging testing case through add the installing frame in the inside of box to at the bottom fixed connection bottom suspension fagging of installing frame and at the roof below spring coupling top of installing frame and go up the backup pad, go into the circuit board vertically along last backup pad and bottom suspension fagging integrated circuit board, and through rotatory bolt ejecting circuit board that makes progress, make the circuit board lower part deviate from the draw-in groove, reduce the area that shelters from of circuit board, improve the programming rate and the homogeneity that heaies up, improve the test effect, excellent in use effect.
In the prior art, a high-temperature aging test is performed on a circuit board through heating pipes, wherein the heating pipes are distributed at the upper end and the lower end of a box body, so that the circuit board is heated unevenly, the test result of the circuit board is further influenced, and meanwhile, the aging degree of the circuit board cannot be detected by controlling different temperatures; moreover, the prior art only carries out high-temperature test on the circuit board, and does not consider the test effect of the circuit board in a low-temperature environment, so that the test result of the circuit board is not comprehensive; secondly, the circuit board can have the circumstances that the external world applyed the effort to the circuit board in the in-service use process, leads to the electrical components on the circuit board to damage, the cracked problem of circuit board even, and above-mentioned prior art does not carry out aging testing to the circuit board to this kind of circumstances.
Disclosure of Invention
In order to ensure that the circuit board can be uniformly heated in the test box, more accurate aging test results of the circuit board are obtained; can test from more aspects when carrying out the strength test to the circuit board simultaneously to obtain more comprehensive test data, consequently this application provides a three-dimensional year formula circuit board aging testing machine that moves.
In a first aspect, the application provides a three-dimensional load-shifting type circuit board aging tester, which adopts the following technical scheme:
the three-dimensional moving-type circuit board aging test machine comprises a test box, wherein the front end of the test box is hinged with a box door made of transparent glass, a heating device used for heating a circuit board and capable of adjusting temperature and a cooling device used for rapidly cooling the circuit board are arranged in the test box, and a clamping and overturning device and a strength test device are arranged in the test box.
Centre gripping turning device includes that two symmetric distributions are at the turn-over table of test box and vertical setting, turn-over table back of the body one end on the back of the body is connected with the axis of rotation, and the slip cover is equipped with T type axle sleeve about the axis of rotation, T type axle sleeve passes through the bearing and installs on the test box lateral wall, two first pneumatic cylinders are all installed to the inside wall about the test box, first pneumatic cylinder output end sliding connection is on turning over the table, two it is provided with the centre gripping unit that is used for the centre gripping circuit board to turn over between the table.
Preferably, the centre gripping unit includes and installs the connecting plate in the relative one end of carousel that turns over through the cushion, the connecting plate evenly is provided with three U type holder along its length direction, the upper and lower both ends of U type holder one side of mutually backing on the back all rotate and install the rotation strip, the tip of rotating strip towards U type holder one end is provided with square strip, sliding sleeve is equipped with back the shape frame on the square strip, it has electronic clamping jaw to go back the shape shelf location, the one end that the rotation strip was kept away from to square strip is provided with the baffle, and is connected with first spring between baffle and the shape frame of returning.
Two inside walls of U type holder down evenly are provided with a plurality of clamp rollers that are used for pressing from both sides tight circuit board from last, the clamp roller lateral wall is provided with elastic rubber ring.
Preferably, be provided with interval adjusting part between rotation strip and the square strip, interval adjusting part has seted up square groove including the one end that the rotation strip kept away from U type holder, square groove bottom portion sets up threaded hole, square strip is close to the one end of rotation strip be provided with square groove sliding fit's square piece, install the locking lead screw through the bearing in the square piece, square strip and square piece are run through respectively at the locking lead screw both ends, and the locking lead screw orientation rotates the one end of strip and the screw hole threaded connection of square groove bottom portion.
Preferably, be provided with the torsion mechanism who is used for wrench movement circuit board on the connecting plate, torsion mechanism includes steady locating rack, both ends all are fixed with the steady locating rack that distributes around two about the connecting plate, set up two spouts that link up about all on the steady locating rack, cloth is equally divided at both ends about the connecting plate has two draw runners that slide respectively and set up in two spouts of steady locating rack, the draw runner is connected with two second pneumatic cylinder output ends respectively through two extension boards, and the second pneumatic cylinder stiff end is installed on the connecting plate.
The steel wire rope connecting device is characterized in that the front end and the rear end of the rotating strip are connected with arc strips, one end, far away from the rotating strip, of each arc strip is connected with a high-temperature-resistant steel wire rope, the steel wire rope is located at the front end of the rotating strip and connected to one sliding strip, and the steel wire rope is located at the rear end of the rotating strip and connected to the other sliding strip.
Preferably, a positioning assembly used for limiting rotation of the rotating shaft is arranged between the T-shaped shaft sleeve and the test box, the positioning assembly comprises two symmetrically-distributed positioning holes formed in the end face of the T-shaped shaft sleeve facing the inner side wall of the test box, mounting holes matched with the positioning holes are formed in the inner side wall of the test box, an electric telescopic rod is mounted in the mounting holes, and the telescopic end of the electric telescopic rod is matched with the positioning holes.
Preferably, set up the spacing hole of bar that link up on the axis of rotation lateral wall, the test box right side wall just is located axis of rotation front end department and installs U type frame, and current cutting homoenergetic can slide in spacing hole of bar and U type frame.
Preferably, the strength testing device includes that the upper end open-ended bearing frame that slides from top to bottom sets up in the test box, it is provided with support panel to slide around in the bearing frame, the fixed block that distributes around two is all installed to the terminal surface left and right sides under the support panel, two that distribute around be provided with the sliding block between the fixed block, and the sliding block slides and sets up under support panel on the terminal surface, be connected with the second spring between sliding block and the fixed block, the sliding block is connected with third pneumatic cylinder output, and the third pneumatic cylinder stiff end is fixed on bearing frame inner wall, the support panel upper end is provided with the test fulcrum unit when being used for the supporting circuit board to test.
Preferably, the test fulcrum unit includes three supporting components that from the past backward evenly distributed on supporting panel, supporting component includes two support columns that fix on supporting panel and distribute around and, two the fulcrum roller is installed through the pivot rotation to the relative one side in support column top, the fulcrum roller lateral wall is provided with the elastic protection layer.
Preferably, a round hole is formed in the lower end face of the fulcrum roller, an adjusting rod is arranged in the round hole in a sliding mode, the lower end of the adjusting rod penetrates through an adjusting hole in the supporting panel in a sliding mode, an electric sliding strip which slides left and right is arranged on the lower end face of the supporting panel, and the lower end of the adjusting rod is hinged to the electric sliding strip.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the aging test device can be used for aging test of circuit boards of different specifications, the clamping unit can clamp and fix the circuit boards of different specifications by specifically controlling the movement of the turnover turntable through the spacing adjusting mechanism and the first hydraulic cylinder, and meanwhile, the circuit boards in the test box can be simultaneously turned over, so that the circuit boards are uniformly heated, and the accuracy of the aging test of the circuit boards is improved.
2. The angle rotation of the fulcrum roller can be realized through the control of the electric sliding strip, and when the fulcrum roller is kept in a vertical state, the bending strength of the circuit board can be tested by the back-and-forth movement of the fulcrum roller; when the fulcrum roller keeps the tilt state, the fulcrum roller cooperates with the electric clamping jaw to realize the diagonal torsion test of the circuit board, and the application range of the application is further improved.
3. According to the invention, through the matching of the electric telescopic rod and the positioning hole on the T-shaped shaft sleeve, the circuit board can be ensured to be kept in a vertical state after the circuit board stops overturning, so that the subsequent strength testing device can carry out aging test on the circuit board.
4. According to the invention, the U-shaped clamping seat can be ensured to be kept in a horizontal state through the strip-shaped limiting hole, the U-shaped frame and the existing inserting strip, and the circuit board can be conveniently installed and taken out.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a perspective sectional view of the present invention.
Fig. 3 is a schematic structural view of the clamping and overturning device of the present invention.
Fig. 4 is a schematic structural view among the connecting plate, the U-shaped holder, the clamping unit and the twisting mechanism of the present invention.
Fig. 5 is a partial enlarged view of fig. 4 a according to the present invention.
FIG. 6 is a schematic structural view of the U-shaped clamping seat, the rotating strip, the arc strip, the steel wire rope, the sliding strip, the square strip, the electric clamping jaw and the spacing adjusting mechanism.
Fig. 7 is a schematic structural diagram of the clamping and overturning device, the circuit board and the strength testing device.
Fig. 8 is a schematic structural view of the clamping and overturning device of the present invention.
Fig. 9 is a schematic bottom view of the clamping and flipping device of the present invention after removing the supporting frame.
Description of the reference numerals: 100. a circuit board; 1. a test box; 11. a U-shaped frame; 2. a clamping and overturning device; 21. turning over the turntable; 22. a rotating shaft; 221. a strip-shaped limiting hole; 23. a T-shaped shaft sleeve; 231. positioning holes; 232. an electric telescopic rod; 24. a first hydraulic cylinder; 25. a clamping unit; 251. a connecting plate; 2511. a stable positioning frame; 2512. a chute; 2513. a slide bar; 2514. a second hydraulic cylinder; 252. a U-shaped holder; 2521. a nip roll; 2522. a rubber ring; 253. rotating the strip; 2531. a square groove; 2532. an arc-shaped strip; 2533. a wire rope; 254. square strips; 2541. a square block; 2542. locking the screw rod; 255. a shape-returning frame; 256. an electric clamping jaw; 257. a baffle plate; 258. a first spring; 3. a strength testing device; 31. a bearing frame; 32. a support panel; 33. a fixed block; 34. a slider; 35. a second spring; 36. a third hydraulic cylinder; 37. a test fulcrum unit; 371. a support pillar; 372. a fulcrum roller; 373. an elastic protective layer; 374. adjusting a rod; 375. an adjustment hole; 376. an electric slider.
Detailed Description
The present application is described in further detail below with reference to figures 1-9.
The first embodiment is as follows: the embodiment of the application discloses three-dimensional moves and carries formula circuit board aging testing machine can carry out the centre gripping simultaneously to a plurality of circuit boards fixed and overturn so that the circuit board thermally equivalent to can detect the ageing condition of circuit board better.
Referring to fig. 1 and 2, the three-dimensional moving-type circuit board 100 aging tester comprises a test box 1, wherein a box door made of transparent glass is hinged at the front end of the test box 1, a heating device (not shown in the figure) used for heating the circuit board 100 and capable of adjusting temperature and a cooling device (not shown in the figure) used for rapidly cooling the circuit board 100 are arranged in the test box 1, and a clamping and overturning device 2 and a strength testing device 3 are arranged in the test box 1.
In the case, the test box 1 can be opened quickly and conveniently by the hinged box door, so that the circuit board 100 can be placed in the test box 1 or the test box 1 can be taken out, and meanwhile, the box door is made of transparent glass, so that a worker can observe the test condition of the circuit board 100 in the test box 1 conveniently; in this case, the circuit board 100 in the test box 1 can be heated by the temperature-adjustable heating device, so that the circuit board 100 can be conveniently simulated in a high-temperature environment, and the aging condition of the circuit board 100 can be conveniently detected, and meanwhile, after the detection is finished, the temperature in the test box 1 is high, the temperature of the circuit board 100 is also high, and the circuit board 100 is inconvenient for a worker to take out, so that the temperature reduction treatment needs to be carried out by a cooling device after the detection is finished; meanwhile, in this case, the plurality of circuit boards 100 are clamped and turned over simultaneously by the clamping and turning device 2, so that the circuit boards 100 can be heated uniformly by the heating device, and the aging test of the circuit boards 100 is performed under the cooperation of the clamping and turning device 2 and the strength testing device 3 after the circuit boards 100 are heated.
Referring to fig. 2 and 3, when the circuit board 100 in the test box 1 starts to be heated by the heating device, the circuit board 100 is uniformly heated by turning the circuit board 100, specifically, the clamping and turning device 2 includes two turning discs 21 which are symmetrically distributed in the test box 1 and vertically arranged, one ends of the turning discs 21, which are opposite to each other, are connected with a rotating shaft 22, a T-shaped shaft sleeve 23 is sleeved on the rotating shaft 22 in a left-right sliding manner, the T-shaped shaft sleeve 23 is mounted on the side wall of the test box 1 through a bearing, two first hydraulic cylinders 24 are mounted on the left inner side wall and the right inner side wall of the test box 1, the output ends of the first hydraulic cylinders 24 are connected to the turning discs 21 in a sliding manner, and a clamping unit 25 for clamping the circuit board 100 is arranged between the turning discs 21.
In the specific implementation process, the rotating shaft 22 is driven to rotate by an external existing drive, and then the circuit board 100 is synchronously rotated by the turnover disc 21 and the clamping unit 25, so that the circuit board 100 can be uniformly heated in the test box 1, wherein the rotating shaft 22 rotates on the side wall of the test box 1 through the T-shaped shaft sleeve 23.
Referring to fig. 3, when the circuit board 100 stops rotating after being heated to a specified temperature, in order to ensure that the circuit board 100 can still keep a vertical state after the circuit board 100 stops rotating, in this case, a positioning assembly for limiting the rotation of the rotation shaft 22 is arranged between the T-shaped shaft sleeve 23 and the test box 1, the positioning assembly comprises two positioning holes 231 symmetrically distributed on the end surface of the T-shaped shaft sleeve 23 facing the inner side wall of the test box 1, a mounting hole matched with the positioning hole 231 is formed in the inner side wall of the test box 1, an electric telescopic rod 232 is installed in the mounting hole, and the telescopic end of the electric telescopic rod 232 is matched with the positioning hole 231.
In specific implementation, after the circuit board 100 is heated to a specified temperature, the external drive stops driving the rotating shaft 22 to rotate, so that the turning plate 21 continues to rotate under the inertia effect, the electric telescopic rod 232 is started when the turning plate 21 is about to stop rotating, so that the telescopic end of the electric telescopic rod 232 thinks of the movement of the T-shaped shaft sleeve 23, when the positioning hole 231 on the T-shaped shaft sleeve 23 is just aligned with the electric telescopic rod 232, the telescopic end of the electric telescopic rod 232 extends into the positioning hole 231, and at this time, the positioning of the horizontal position of the turning plate 21 is realized, so that the circuit board 100 is ensured to be kept in a vertical state, and the subsequent aging test of the circuit board 100 by the strength testing device 3 is facilitated.
Referring to fig. 1 to 3, when the circuit board 100 in the test box 1 needs to be taken out after the circuit board 100 is tested, or when the circuit board 100 needs to be placed in the test box 1, the rotating shaft 22 needs to be rotated to facilitate the placement and the taking out of the circuit board 100, so that the circuit board 100 can be horizontally placed in the clamping unit 25 or taken out of the clamping unit 25, a through bar-shaped limiting hole 221 is formed in the outer side wall of the rotating shaft 22, the U-shaped frame 11 is installed on the right side wall of the test box 1 and located at the front end of the rotating shaft 22, and existing inserts can slide in the bar-shaped limiting hole 221 and the U-shaped frame 11.
The positioning limitation of the positioning assembly on the T-shaped shaft sleeve 23 needs to be cancelled, then one end of an existing inserting strip is inserted into the strip-shaped limiting hole 221, the inserting strip is in a vertical state at the moment, then the rotating shaft 22 is rotated to enable the inserting strip to be kept in a horizontal state, and the other end of the inserting strip is inserted into the U-shaped frame 11, so that the rotating shaft 22 is fixed after being rotated, and the circuit board 100 is convenient to place and take out.
Referring to fig. 3 to 5, and then returning to the clamping unit 25, in this embodiment, the clamping unit 25 may clamp three circuit boards 100 at the same time, specifically, the clamping unit 25 includes a connecting plate 251 installed at one end of the flipping disk 21 opposite to the flipping disk 21 through a cushion block, the connecting plate 251 is uniformly provided with three U-shaped clamping seats 252 along a length direction thereof, upper and lower ends of one side of the U-shaped clamping seat 252 opposite to the one end of the U-shaped clamping seat 252 are both rotatably installed with a rotating bar 253, an end of the rotating bar 253 facing the one end of the U-shaped clamping seat 252 is provided with a square bar 254, a rectangular frame 255 is slidably sleeved on the square bar 254, the rectangular frame 255 is installed with an electric clamping jaw 256, one end of the square bar 254 far away from the rotating bar 253 is provided with a baffle 257, and a first spring 258 is connected between the baffle 257 and the rectangular frame 255.
When the circuit board 100 is to be clamped in the clamping unit 25, the present embodiment can ensure that the U-shaped clamping seat 252 keeps a horizontal state through the strip-shaped limiting hole 221, the U-shaped frame 11 and the existing insert strip, and simultaneously, the square strip 254 at the front end of the U-shaped clamping seat 252 is rotated, so that the electric clamping jaw 256 at the front end of the U-shaped clamping seat 252 is dislocated with the U-shaped clamping seat 252, and the electric clamping jaw 256 is prevented from blocking the U-shaped clamping seat 252 to influence the mounting and clamping of the circuit board 100; firstly, two ends of the circuit board 100 horizontally slide into the grooves of the U-shaped holder 252, then the circuit board 100 is pushed until the rear end of the circuit board 100 is clamped into the electric clamping jaw 256 at the rear end of the U-shaped holder 252, and then the electric clamping jaw 256 at the front end of the U-shaped holder 252 is rotated, so that the electric clamping jaw 256 clamps the front end of the circuit board 100, and at this time, the mounting and clamping of one circuit board 100 are completed.
Referring to fig. 5, in order to ensure that the U-shaped holder 252 can hold and fix the left and right ends of the circuit board 100, in this case, a plurality of clamping rollers 2521 for clamping the circuit board 100 are uniformly arranged on two inner side walls of the U-shaped holder 252 from top to bottom, and an elastic rubber ring 2522 is arranged on the outer side wall of each clamping roller 2521; the circuit board 100 can be conveniently slid in the groove of the U-shaped holder 252 by the clamp roller 2521, convenience in mounting the circuit board 100 is ensured, meanwhile, a certain pressure can be exerted on the circuit board 100 by the elastic rubber ring 2522 on the outer side wall of the clamp roller 2521, so that the circuit board 100 can be clamped, and meanwhile, the damage to the circuit board 100 caused by the direct contact of the clamp roller 2521 with the circuit board 100 can be avoided by the rubber ring 2522.
Referring to fig. 6, in order to ensure that the circuit board 100 can be smoothly clamped between the two U-shaped holders 252, and the electric clamping jaw 256 can clamp the circuit board 100, in this case, an interval adjusting assembly is arranged between the rotating strip 253 and the square strip 254, the interval adjusting assembly includes that the rotating strip 253 is far away from one end of the U-shaped holder 252 and is provided with a square groove 2531, the bottom of the square groove 2531 is provided with a threaded hole, one end of the square strip 254 close to the rotating strip 253 is provided with a square block 2541 in sliding fit with the square groove 2531, a locking screw rod 2542 is installed in the square block 2541 through a bearing, two ends of the locking screw rod 2542 respectively penetrate through the square strip 254 and the square block 2541, and the two ends of the locking screw rod 2542 are in threaded connection with the threaded hole at the bottom of the square groove 2531 towards one end of the rotating strip 253.
When the U-shaped clamp holder 252 keeps a horizontal state, the locking screw rod 2542 is screwed to enable the square block 2541 to exit the square groove 2531, when the square block 2541 completely exits the square groove 2531, the square strip 254 can drive the electric clamping jaw 256 to rotate so as to enable the electric clamping jaw 256 and the U-shaped clamp holder 252 to be staggered, the circuit board 100 is conveniently installed in the U-shaped clamp holder 252 in a sliding mode, then the electric clamping jaw 256 is rotated to an initial angle, and the locking screw rod 2542 is screwed tightly, so that the electric clamping jaw 256 can clamp the circuit board 100; in addition, in the embodiment, the distance between the electric clamping jaw 256 and the U-shaped clamping seat 252 can be changed by adjusting the position of the square block 2541 in the square groove 2531, and the distance between the two U-shaped clamping seats 252 can be adjusted by matching the first hydraulic cylinder 24, so that the circuit boards 100 with different specifications can be clamped and mounted.
Example two:
referring to fig. 7 to 9, on the basis of the first embodiment, the clamping and turning mechanism is used to uniformly heat the circuit board 100, and after the heating is completed, the positioning assembly is used to keep the circuit board 100 in a vertical state, so that the subsequent strength testing device 3 can perform an aging test on the circuit board 100; specifically, intensity test device 3 sets up in test box 1 and upper end open-ended bearing frame 31 including sliding from top to bottom, it is provided with supporting panel 32 to slide around in the bearing frame 31, two fixed blocks 33 that distribute around all installing two under supporting panel 32 terminal surface left and right sides, two that distribute around be provided with sliding block 34 between the fixed block 33, and sliding block 34 slides and sets up under supporting panel 32 on the terminal surface, be connected with second spring 35 between sliding block 34 and the fixed block 33, sliding block 34 is connected with third pneumatic cylinder 36 output, and the 36 stiff ends of third pneumatic cylinder are fixed on bearing frame 31 inner wall, supporting panel 32 upper end is provided with test fulcrum unit 37 when being used for supporting circuit board 100 to test.
In the specific implementation process, the bearing frame 31 is driven to move upwards through the existing lifting device (such as a lifter, a hydraulic cylinder and the like), so that the test fulcrum unit 37 moves upwards to a proper height, and the circuit board 100 is supported and bent, in this case, the third hydraulic cylinder 36 pushes the sliding block 34 to move, and meanwhile, the second spring 35 and the fixed block 33 push the supporting panel 32 to slide in the bearing frame 31, so that the test fulcrum unit 37 starts to act on the middle part of the circuit board 100, and further, the middle part of the circuit board 100 has a bending acting force, and therefore, the bending strength test can be performed on the circuit board 100.
With continuing reference to fig. 7 to 9, the test fulcrum unit 37 includes three support members evenly distributed on the support panel 32 from front to back, the support members include two support columns 371 fixed on the support panel 32 and distributed front to back, a fulcrum roller 372 is rotatably mounted on one side of the top of the two support columns 371 through a rotating shaft, and an elastic protection layer 373 is disposed on an outer side wall of the fulcrum roller 372.
When the support frame 31 moves upwards, the support panel 32 drives the support posts 371 to move upwards synchronously, so that the two support posts 371 on the support assembly move to two sides of the circuit board 100 respectively, when the third hydraulic cylinder 36 pushes the sliding block 34 to move, the support posts 371 are driven by the support panel 32 to move, and then a fulcrum roller 372 on the support assembly contacts with the circuit board 100 through an elastic protection layer 373, and the circuit board 100 has bending power, so that the bending strength test of the circuit board 100 can be performed, in the embodiment, the problem that the circuit board 100 is damaged due to the fact that the fulcrum roller 372 directly contacts with the circuit board 100 is avoided through the elastic protection layer 373.
Referring to fig. 4 to 7, referring back to the rotating bar 253 in the first embodiment, the twisting strength of the circuit board 100 can be tested by rotating the two rotating bars 253 on the diagonal line of the circuit board 100, so that the connecting plate 251 is provided with a twisting mechanism for twisting the circuit board 100, the twisting mechanism comprises a stable positioning frame 2511, two stable positioning frames 2511 distributed front and back are fixed at the upper and lower ends of the connecting plate 251, the stable positioning frame 2511 is provided with two sliding grooves 2512 penetrating left and right, two sliding bars 2513 respectively slidably arranged in the two sliding grooves 2512 of the stable positioning frame 2511 are distributed at the upper and lower ends of the connecting plate 251, the sliding bars 2513 are respectively connected with the output ends of two second hydraulic cylinders 2514 through two extending plates, and the fixed ends of the second hydraulic cylinders 2514 are installed on the connecting plate 251; the front end and the rear end of the rotating strip 253 are connected with arc strips 2532, one end, far away from the rotating strip 253, of each arc strip 2532 is connected with a high-temperature-resistant steel wire rope 2533, the steel wire rope 2533 located at the front end of the rotating strip 253 is connected to one sliding strip 2513, and the steel wire rope 2533 located at the rear end of the rotating strip 253 is connected to the other sliding strip 2513.
In the specific implementation process, the turnover disc 21 is pulled by the first hydraulic cylinder 24 to move towards the side wall of the test box 1, so that the U-shaped holder 252 is separated from contact with the circuit board 100, the square strip 254 slides on the square frame 255, and the first spring 258 is in a compressed state, when the U-shaped holder 252 is separated from contact with the circuit board 100, the second hydraulic cylinder 2514 drives one sliding strip 2513 on the stable positioning frame 2511 to slide towards the direction close to the connecting plate 251, and the sliding strip 2513 drives the arc strip 2532 to drive the rotating strip 253 to rotate by pulling the steel wire rope 2533, so that two electric clamping jaws 256 on the diagonal of the circuit board 100 rotate towards the same side under the action of the fulcrum roller 372, and the diagonal torsion test of the circuit board 100 can be performed, and the aging degree of the circuit board 100 can be detected more comprehensively.
Referring to fig. 9, continuing to look back at the fulcrum rollers 372, when the circuit board 100 is subjected to the diagonal torsion test, the fulcrum rollers 372 cannot continue to keep a vertical state and need to keep a certain inclination angle, so that a circular hole is formed in the lower end surface of the fulcrum rollers 372, an adjusting rod 374 is slidably arranged in the circular hole, the lower end of the adjusting rod 374 slidably penetrates through an adjusting hole 375 in the support panel 32, an electric slide bar 376 which slides left and right is arranged on the lower end surface of the support panel 32, and the lower end of the adjusting rod 374 is hinged to the electric slide bar 376.
In a specific implementation process, the electric sliding bar 376 moves along the length direction of the adjusting hole 375, so that the electric sliding bar 376 drives the bottom of the adjusting rod 374 to move synchronously, and further the inclination angle of the fulcrum roller 372 can be adjusted by sliding the adjusting rod 374 in the fulcrum roller 372, so as to adapt to a diagonal torsion test of the circuit board 100.
Therefore, based on the two embodiments, the aging test can be performed on the circuit boards 100 of different specifications, and the clamping unit 25 can clamp and fix the circuit boards 100 of different specifications by specifically controlling the movement of the turnover table 21 through the spacing adjustment mechanism and the first hydraulic cylinder 24, and meanwhile, the aging test can be performed on a plurality of circuit boards 100 in the test box 1 simultaneously, so that the circuit boards 100 are uniformly heated, and the accuracy of the aging test of the circuit boards 100 is improved; secondly, the bending strength of the circuit board 100 can be tested by the back and forth movement of the fulcrum roller 372, and the fulcrum roller 372 is matched with the electric clamping jaw 256 to realize the diagonal torsion test of the circuit board 100, so that the application range of the application is further widened.
The implementation principle of the application is as follows:
(1): the U-shaped clamping seat 252 is kept in a horizontal state through the strip-shaped limiting hole 221, the U-shaped frame 11 and the existing inserting strip, then the box door is opened, the circuit boards 100 to be tested are horizontally placed on the clamping unit 25 one by one, so that the clamping unit 25 clamps the circuit boards, then the existing inserting strip is removed, the rotating shaft 22 is driven by the existing external drive to rotate, the circuit boards 100 rotate synchronously, and therefore the heating device in the test box 1 can uniformly heat the circuit boards 100, and the circuit boards 100 are guaranteed to be heated uniformly.
(2): after the circuit board 100 is heated, the rotating shaft 22 is limited by the positioning assembly to ensure that the circuit board 100 can keep a horizontal state when stopping rotating, and then the bearing frame 31 is driven by the existing lifting device to move upwards, so that the test fulcrum unit 37 moves upwards to a proper height, and the fulcrum support and bending test can be carried out on the circuit board 100.
(3): when the bending test is performed on the circuit board 100, the fulcrum rollers 372 keep a vertical state, and then the third hydraulic cylinder 36 drives the lower support panel 32 to move, so that the fulcrum rollers 372 are driven to move synchronously, and the two ends of the circuit board 100 are fixed by the U-shaped clamping seats 252, so that the fulcrum rollers 372 push the middle of the circuit board 100, and the bending test of the circuit board 100 is realized.
(4): when the circuit board 100 is subjected to the diagonal twist test, the fulcrum roller 372 is kept inclined, and then the two rotating strips 253 on the diagonal line of the circuit board 100 are rotated toward the same side by the pushing of the second hydraulic cylinder 2514, so that the diagonal twist test of the circuit board 100 can be performed by the electric holding jaw 256.
(5): the strength testing device 3 resets after the test is completed, then the circuit board 100 is cooled through the cooling device, then the U-shaped clamping seat is controlled through the existing inserting strip to keep a horizontal state, then the box door is opened, and the circuit board 100 is taken out.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: equivalent changes made according to the structure, shape and principle of the invention shall be covered by the protection scope of the invention.
Claims (9)
1. The utility model provides a three-dimensional year moves formula circuit board aging testing machine that carries, includes test box (1), test box (1) front end articulates the chamber door that has the transparent glass material, its characterized in that: a heating device with adjustable temperature for heating the circuit board and a cooling device for rapidly cooling the circuit board are arranged in the test box (1), and a clamping and overturning device (2) and a strength test device (3) are arranged in the test box (1); centre gripping turning device (2) include two symmetric distributions in test box (1) and the carousel (21) that turn over of vertical setting, the carousel (21) that turns over is carried on the back one end mutually and is connected with axis of rotation (22), and the horizontal slip cover is equipped with T type axle sleeve (23) on axis of rotation (22), T type axle sleeve (23) are installed on test box (1) lateral wall through the bearing, two first pneumatic cylinders (24) are all installed to the inside wall about test box (1), first pneumatic cylinder (24) output sliding connection is on the carousel (21) that turns over, two it is provided with centre gripping unit (25) that are used for the centre gripping circuit board to turn over between carousel (21).
2. The three-dimensional moving-loading type circuit board aging tester as claimed in claim 1, wherein: the clamping unit (25) comprises a connecting plate (251) which is installed at one end, opposite to the turnover disc (21), of the turnover disc (21) through a cushion block, three U-shaped clamping seats (252) are evenly arranged on the connecting plate (251) along the length direction of the connecting plate (251), the upper end and the lower end of one side, opposite to the U-shaped clamping seats (252), of each U-shaped clamping seat (252) are respectively and rotatably provided with a rotating strip (253), a square strip (254) is arranged at the end, facing one end of the U-shaped clamping seat (252), of each rotating strip (253), a returning frame (255) is slidably sleeved on each square strip (254), an electric clamping jaw (256) is installed on each returning frame (255), a baffle (257) is arranged at one end, far away from each rotating strip (253), of each square strip (254), and a first spring (258) is connected between each baffle (257) and each returning frame (255); two inside walls of U type holder (252) are from last to down evenly being provided with a plurality of pinch rolls (2521) that are used for the tight circuit board of clamp, pinch roll (2521) lateral wall is provided with elastic rubber ring (2522).
3. The three-dimensional moving-loading type circuit board aging tester as claimed in claim 2, wherein: rotate and be provided with interval adjusting part between strip (253) and square strip (254), interval adjusting part has seted up square groove (2531) including rotating strip (253) and keeping away from the one end of U type holder (252), threaded hole is seted up to square groove (2531) bottom, square strip (254) are close to the one end of rotating strip (253) and are provided with square piece (2541) with square groove (2531) sliding fit, install locking lead screw (2542) through the bearing in square piece (2541), square strip (254) and square piece (2541) are run through respectively to locking lead screw (2542) both ends, and locking lead screw (2542) rotate the one end of strip (253) and the threaded hole threaded connection of square groove (2531) bottom.
4. The three-dimensional moving-loading type circuit board aging tester as claimed in claim 2, wherein: the circuit board twisting mechanism comprises a stable positioning frame (2511), two stable fixing frames which are distributed front and back are fixed at the upper end and the lower end of the connecting plate (251), two sliding grooves (2512) which are communicated left and right are formed in the stable fixing frames, two sliding strips (2513) which are respectively arranged in the two sliding grooves (2512) of the stable fixing frames in a sliding mode are distributed at the upper end and the lower end of the connecting plate (251), the sliding strips (2513) are respectively connected with the output ends of two second hydraulic cylinders (2514) through two extending plates, and the fixed ends of the second hydraulic cylinders (2514) are installed on the connecting plate (251); rotate strip (253) front and back both ends and all be connected with arc strip (2532), the one end that rotation strip (253) was kept away from in arc strip (2532) is connected with high temperature resistance wire rope (2533), is located rotation strip (253) front end wire rope (2533) are connected on one draw runner (2513), are located rotation strip (253) rear end wire rope (2533) are connected on another draw runner (2513).
5. The three-dimensional transfer type circuit board aging tester according to claim 1, characterized in that: be provided with between T type axle sleeve (23) and test box (1) and be used for restricting axis of rotation (22) pivoted locating component, locating component includes two symmetric distribution's that T type axle sleeve (23) set up towards the terminal surface of test box (1) inside wall locating hole (231), test box (1) inside wall is seted up with locating hole (231) matched with mounting hole, install electric telescopic handle (232) in the mounting hole, the flexible end and the locating hole (231) of electric telescopic handle (232) cooperate.
6. The three-dimensional moving-loading type circuit board aging tester as claimed in claim 1, wherein: seted up the spacing hole of bar (221) that link up on axis of rotation (22) lateral wall, test box (1) right side wall just is located axis of rotation (22) front end department and installs U type frame (11), and current cutting homoenergetic can slide in spacing hole of bar (221) and U type frame (11).
7. The three-dimensional moving-loading type circuit board aging tester as claimed in claim 1, wherein: the strength testing device (3) comprises a bearing frame (31) which is arranged in the testing box (1) in a vertically sliding manner and is provided with an opening at the upper end, a supporting panel (32) is arranged in the supporting frame (31) in a front-back sliding manner, two fixing blocks (33) which are distributed in the front-back manner are respectively arranged at the left side and the right side of the lower end surface of the supporting panel (32), a sliding block (34) is arranged between the two fixing blocks (33) which are distributed in the front-back manner, a sliding block (34) is arranged on the lower end surface of the supporting panel (32) in a sliding way, a second spring (35) is connected between the sliding block (34) and the fixed block (33), the sliding block (34) is connected with the output end of a third hydraulic cylinder (36), and the fixed end of the third hydraulic cylinder (36) is fixed on the inner wall of the bearing frame (31), the upper end of the supporting panel (32) is provided with a testing fulcrum unit (37) used for supporting the circuit board during testing.
8. The three-dimensional transfer type circuit board aging tester according to claim 7, wherein: the test fulcrum unit (37) includes three supporting component from the past backward evenly distributed on supporting panel (32), supporting component includes two support columns (371) of fixing on supporting panel (32) and distributing around and, two the relative one side in support column (371) top is rotated through the pivot and is installed fulcrum roller (372), fulcrum roller (372) lateral wall is provided with elastic protection layer (373).
9. The three-dimensional moving-loading type circuit board aging tester as claimed in claim 8, wherein: the supporting point roller is characterized in that a round hole is formed in the lower end face of the supporting point roller (372), an adjusting rod (374) is arranged in the round hole in a sliding mode, the lower end of the adjusting rod (374) penetrates through an adjusting hole (375) in the supporting panel (32) in a sliding mode, an electric sliding strip (376) which slides left and right is arranged on the lower end face of the supporting panel (32), and the lower end of the adjusting rod (374) is hinged to the electric sliding strip (376).
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| CN202210673922.3A CN114755566B (en) | 2022-06-15 | 2022-06-15 | Three-dimensional load-shifting type circuit board aging test machine |
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| CN116643153A (en) * | 2023-07-27 | 2023-08-25 | 陕西汇天广科信息科技有限公司 | High-low temperature testing device for integrated circuit |
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| CN114755566B (en) | 2022-08-23 |
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