CN113655369A - PCBA board welding spot test structure and test method thereof - Google Patents
PCBA board welding spot test structure and test method thereof Download PDFInfo
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- CN113655369A CN113655369A CN202110907577.0A CN202110907577A CN113655369A CN 113655369 A CN113655369 A CN 113655369A CN 202110907577 A CN202110907577 A CN 202110907577A CN 113655369 A CN113655369 A CN 113655369A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2801—Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP]
- G01R31/281—Specific types of tests or tests for a specific type of fault, e.g. thermal mapping, shorts testing
- G01R31/2812—Checking for open circuits or shorts, e.g. solder bridges; Testing conductivity, resistivity or impedance
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention relates to the technical field of testing devices, in particular to a PCBA board welding spot testing structure and a testing method thereof; the PCBA board welding spot test structure comprises a workbench, two fixing mechanisms, a needle seat and a plurality of probes; the fixing mechanism comprises a lifting device, a supporting plate, a spring, a limiting plate, a sliding rod and a pressing and holding piece; through placing the PCBA board on the operation panel, two elevating gear drive two backup pads move down, two backup pads move down and drive two pressures and hold a piece and the needle file moves down, two pressures hold earlier with the PCBA board contact, and press the PCBA board fastening fixed, move down along with lasting of backup pad, two springs are stretched, a plurality of probes on the needle file and PCBA board butt joint simultaneously, whether solder joint on the test PCBA board exists rosin joint or false solder joint, thereby realize when the test PCBA board, convenient and fast fixes the PCBA board, the required time of fixed PCBA board has been reduced, can improve efficiency of software testing.
Description
Technical Field
The invention relates to the technical field of testing devices, in particular to a PCBA board welding spot testing structure and a testing method thereof.
Background
PCBA board is the dress circuit board promptly, before the PCBA board dispatches from the factory, all need pass through the test, in the test, need fix the PCBA board on the workstation, then test through probe and PCBA board butt joint, whether there is rosin joint or false solder joint in the solder joint on the detection PCBA board, use quick clamp or convertible pressfitting anchor clamps to the fixed of PCBA board usually at present, these anchor clamps all need staff manual operation, thereby lead to need expending plenty of time when fixed PCBA board, the efficiency of software testing is reduced.
Disclosure of Invention
The invention aims to provide a PCBA (printed circuit board assembly) welding spot test structure and a test method thereof, which can be used for quickly fixing a PCBA when the PCBA is tested.
In order to achieve the above object, in a first aspect, the present invention provides a PCBA board solder joint test structure, which includes a worktable, two fixing mechanisms, a needle seat and a plurality of probes; the two fixing mechanisms are positioned on two sides of the workbench; the fixing mechanism comprises a lifting device, a supporting plate, a spring, a limiting plate, a sliding rod and a pressing and holding piece; the lifting device is fixedly connected with the workbench and is positioned above the workbench; the supporting plate is fixedly connected with the lifting device and is positioned on the side edge of the lifting device; the spring is fixedly connected with the supporting plate and is positioned above the supporting plate; the limiting disc is fixedly connected with the spring and is positioned above the spring; the sliding rod is fixedly connected with the limiting disc, is connected with the supporting plate in a sliding mode, and penetrates through the spring and the supporting plate; the pressing and holding piece is fixedly connected with the sliding rod and is positioned on one side of the sliding rod, which is far away from the limiting disc; the needle base is fixedly connected with the two supporting plates respectively and is positioned between the two supporting plates; the plurality of probes are respectively and fixedly connected with the needle base and are respectively positioned below the needle base.
The lifting device comprises an upright post, a guide piece and a cylinder; the upright post is fixedly connected with the workbench and is positioned above the workbench; the guide piece is connected with the upright column in a sliding manner, is fixedly connected with the supporting plate and is positioned between the upright column and the supporting plate; the air cylinder is fixedly connected with the workbench and the supporting plate respectively and is positioned between the workbench and the supporting plate.
The air cylinder can drive the supporting plate to move longitudinally, so that the PCBA can be fixed and tested; the upright post and the guide piece can prevent the support plate from moving in a staggered manner.
Wherein, the lifting device also comprises an anti-drop block; the anti-falling block is fixedly connected with the upright column and is positioned above the upright column.
The anti-falling block can prevent the guide part from falling off from the upper part of the upright column due to overlarge pushing amount of the air cylinder.
Wherein, the lifting device also comprises a limiting block; the limiting block is fixedly connected with the upright post and is positioned on the side edge of the upright post.
The stopper can prevent because of the cylinder is to the back-pull volume of backup pad is too big, and leads to a plurality of the probe moves down the volume too big, avoids probe and PCBA board are impaired.
The workbench comprises a base, a rotating device, a bracket and two placing tables; the base is fixedly connected with the two upright posts respectively and is positioned below the two upright posts; the rotating device is fixedly connected with the base and is positioned above the base; the bracket is fixedly connected with the rotating device and is positioned above the rotating device; the two placing tables are fixedly connected with the support respectively and are positioned on two sides of the support.
Through placing two PCBA boards that await measuring respectively place the bench, after one of them PCBA board that awaits measuring test finishes, through rotary device can drive the support rotates 180, the support drives two place the platform and rotate 180, make two place a switching position, can test another PCBA board that awaits measuring this moment, the staff can take off the PCBA board after the test simultaneously to the PCBA board that a repeated awaits measuring is placed, so reciprocal, can improve efficiency of software testing.
The workbench further comprises two deviation preventing pieces; the two deviation preventing pieces are fixedly connected with the support respectively, are connected with the base in a sliding mode and are located between the support and the base respectively.
Through prevent inclined to one side piece can prevent the support takes place the dislocation when rotating.
Wherein, the deviation-proof piece comprises a connecting rod and a sliding block; the connecting rod is fixedly connected with the bracket and is positioned below the bracket; the slider with the connecting rod fixed connection, and with base sliding connection, and be located the connecting rod with between the base.
The support rotates and can drive the connecting rod and the sliding block rotates, and the base can prevent the support from moving in a staggered manner when rotating through the limiting effect of the sliding block.
In a second aspect, the present invention further provides a method for testing a solder joint of a PCBA board, including: placing the PCBA board on an operation table; controlling the two lifting devices to drive the two supporting plates to move downwards; the two supporting plates move downwards to drive the two pressing and holding pieces and the needle seat to move downwards, and the PCBA plate is pressed and fixed by the two pressing and holding pieces; with the continuous move down of backup pad, two springs are stretched, and a plurality of probes on the needle file butt joint and PCBA board simultaneously test PCBA board whether have rosin joint or false solder.
When the PCBA welding spot testing structure and the testing method thereof are used, firstly, a PCBA is placed on the workbench, then the two lifting devices are controlled to respectively drive the two supporting plates to move downwards, the two supporting plates move downwards to drive the two pressing and holding pieces and the needle seat to move downwards, the two pressing and holding pieces can be firstly contacted with the PCBA to tightly press and fix the PCBA on the workbench, the spring can be stretched along with the continuous downward movement of the supporting plates, meanwhile, the needle seat can continuously move downwards until the plurality of probes on the needle seat are butted with the PCBA, and whether the welding spots on the PCBA have false welding or not can be detected through the plurality of probes; after the test is finished, the two lifting devices respectively push the two supporting plates to move upwards, so that the two pressing and holding pieces and the needle base reset, and the next PCBA board can be tested; the supporting plate can limit the sliding rod, so that the pressing and holding piece can be prevented from deviating when moving, components on a PCBA can be prevented from being damaged, and the spring can be prevented from being bent when being stretched; the sliding rod can be prevented from falling off from the supporting plate through the limiting disc; in this way, can be when the test PCBA board, convenient and fast fixes the PCBA board, need not use again through the manual work to press from both sides fast or convertible pressfitting anchor clamps fix the PCBA board, has reduced the required time of fixed PCBA board to can improve efficiency of software testing.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a PCBA board solder joint test structure according to the present invention;
FIG. 2 is an enlarged partial view of detail A of FIG. 1;
FIG. 3 is a schematic view of the structure of the table of the present invention;
FIG. 4 is a side sectional view of the table of the present invention;
FIG. 5 is a schematic view of the structure of the standing board of the present invention;
FIG. 6 is a side sectional view of the holding table of the present invention;
FIG. 7 is a flow chart of a method for testing solder joints of a PCBA board according to the present invention.
1-workbench, 2-fixing mechanism, 3-needle seat, 4-probe, 11-base, 12-rotating device, 13-bracket, 14-placing table, 15-deviation preventing piece, 21-lifting device, 22-supporting plate, 23-spring, 24-limiting plate, 25-sliding rod, 26-pressing piece, 141-shell, 142-suction fan, 143-tray, 151-connecting rod, 152-sliding block, 211-upright column, 212-guiding piece, 213-air cylinder, 214-anti-falling block, 215-limiting block, 1430-air hole, 1431-placing plate, 1432-positioning block and 1433-rubber pad.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1 to 7, in a first aspect, the present invention provides a solder joint testing structure of a PCBA board: the PCBA board welding spot test structure comprises a workbench 1, two fixing mechanisms 2, a needle seat 3 and a plurality of probes 4; the two fixing mechanisms 2 are positioned at two sides of the workbench 1; the fixing mechanism 2 comprises a lifting device 21, a supporting plate 22, a spring 23, a limiting disc 24, a sliding rod 25 and a pressing and holding piece 26; the lifting device 21 is fixedly connected with the workbench 1 and is positioned above the workbench 1; the supporting plate 22 is fixedly connected with the lifting device 21 and is positioned on the side edge of the lifting device 21; the spring 23 is fixedly connected with the support plate 22 and is positioned above the support plate 22; the limiting disc 24 is fixedly connected with the spring 23 and is positioned above the spring 23; the sliding rod 25 is fixedly connected with the limiting disc 24, is connected with the supporting plate 22 in a sliding manner, and penetrates through the spring 23 and the supporting plate 22; the pressing piece 26 is fixedly connected with the sliding rod 25 and is positioned on one side of the sliding rod 25 far away from the limiting disc 24; the needle seat 3 is fixedly connected with the two support plates 22 respectively and is positioned between the two support plates 22; the plurality of probes 4 are respectively and fixedly connected with the needle base 3 and are respectively positioned below the needle base 3.
In this embodiment, when in use, a PCBA board is placed on the workbench 1, then the two lifting devices 21 are controlled to respectively drive the two support plates 22 to move downwards, the two support plates 22 move downwards to drive the two holding pieces 26 and the needle base 3 to move downwards, the two holding pieces 26 will contact with the PCBA board first, the PCBA board is pressed and fixed on the workbench 1, the spring 23 will be stretched along with the continuous downward movement of the support plates 22, and the needle base 3 will continue to move downwards at the same time until the plurality of probes 4 on the needle base 3 are butted with the PCBA board, and whether a cold solder joint or a false solder joint exists in a solder joint on the PCBA board can be detected through the plurality of probes 4; after the test is finished, the two lifting devices 21 respectively push the two supporting plates 22 to move upwards, so that the two pressing and holding pieces 26 and the needle base 3 are reset, and the test of the next PCBA board can be carried out; the supporting plate 22 limits the sliding rod 25, so that the pressing and holding piece 26 can be prevented from deviating when moving, components on a PCBA can be prevented from being damaged, and the spring 23 can be prevented from bending when stretching; the slide rod 25 can be prevented from falling off the support plate 22 by the limiting disc 24; in this way, can be when the test PCBA board, convenient and fast fixes the PCBA board, need not use again through the manual work to press from both sides fast or convertible pressfitting anchor clamps fix the PCBA board, has reduced the required time of fixed PCBA board to can improve efficiency of software testing.
Further, the lifting device 21 includes a column 211, a guide 212 and a cylinder 213; the upright column 211 is fixedly connected with the workbench 1 and is positioned above the workbench 1; the guide 212 is slidably connected with the upright 211, is fixedly connected with the support plate 22, and is positioned between the upright 211 and the support plate 22; the air cylinder 213 is fixedly connected with the workbench 1 and the support plate 22 respectively and is positioned between the workbench 1 and the support plate 22; the lifting device 21 further comprises an anti-falling block 214; the anti-falling block 214 is fixedly connected with the upright post 211 and is positioned above the upright post 211; the lifting device 21 further comprises a limit block 215; the limiting block 215 is fixedly connected with the upright post 211 and is positioned at the side edge of the upright post 211.
In the present embodiment, the cylinder 213 can drive the supporting plate 22 to move longitudinally, so as to fix and test the PCBA board; when the supporting plate 22 moves, the guiding element 212 is driven to slide on the upright post 211, and the upright post 211 limits the guiding element 212, so that the supporting plate 22 can be prevented from moving in a staggered manner, and the position deviation of the pressing and holding element 26 and the plurality of probes 4 is avoided; the anti-drop block 214 can prevent the guide 212 from dropping from the upright 211 due to the excessive pushing amount of the cylinder 213; the limiting block 215 can prevent the plurality of probes 4 from moving downwards too much due to the fact that the air cylinder 213 pulls back the supporting plate 22 too much, and damage to the probes 4 and the PCBA board is avoided.
Further, the workbench 1 comprises a base 11, a rotating device 12, a bracket 13 and two placing tables 14; the base 11 is respectively fixedly connected with the two upright posts 211 and is positioned below the two upright posts 211; the rotating device 12 is fixedly connected with the base 11 and is positioned above the base 11; the bracket 13 is fixedly connected with the rotating device 12 and is positioned above the rotating device 12; the two placing tables 14 are respectively fixedly connected with the bracket 13 and are positioned at two sides of the bracket 13; the workbench 1 further comprises two deviation-preventing pieces 15; the two deviation preventing pieces 15 are fixedly connected with the support 13 respectively, are connected with the base 11 in a sliding mode respectively, and are located between the support 13 and the base 11 respectively.
In this embodiment, the placing tables 14 can support the PCBA boards, and by placing two to-be-tested PCBA boards on the two placing tables 14 respectively, after one of the to-be-tested PCBA boards is tested, the rotating device 12 can drive the bracket 13 to rotate 180 °, the bracket 13 drives the two placing tables 14 to rotate 180 °, so that the two placing tables 14 exchange positions, at this time, the other to-be-tested PCBA board can be tested, and meanwhile, a worker can take down the tested PCBA board and place a to-be-tested PCBA board again, and so on, the testing efficiency can be improved; the base 11 is provided with a sliding groove matched with the anti-deviation piece 15, and the base 11 can prevent the support 13 from moving in a staggered manner when rotating under the limiting effect of the anti-deviation piece 15, so that the position of the placing table 14 is prevented from deviating.
Further, the deviation preventing member 15 includes a connecting rod 151 and a sliding block 152; the connecting rod 151 is fixedly connected with the bracket 13 and is positioned below the bracket 13; the sliding block 152 is fixedly connected to the connecting rod 151, slidably connected to the base 11, and located between the connecting rod 151 and the base 11.
In this embodiment, the base 11 is provided with an annular sliding groove matched with the sliding block 152, the support 13 rotates to drive the connecting rod 151 and the sliding block 152 to rotate, and the base 11 limits the sliding block 152, so that the support 13 can be prevented from being dislocated when rotating.
Further, the placing table 14 includes a housing 141, a suction fan 142 and a tray 143; the shell 141 is fixedly connected with the bracket 13 and is positioned above the bracket 13; the suction fan 142 is fixedly connected with the casing 141 and is positioned inside the casing 141; the tray 143 is fixedly connected with the casing 141 and is positioned above the casing 141; the tray 143 has wind holes 1430.
In this embodiment, the tray 143 can provide support for the PCBA board, and the suction fan 142 can generate suction force and transmit the suction force to the PCBA board placed on the tray 143 through the air holes 1430, so that the PCBA board can be fixed.
Further, the tray 143 includes a placing plate 1431 and a plurality of positioning blocks 1432; the placing plate 1431 is fixedly connected to the housing 141 and is located above the housing 141; the positioning blocks 1432 are respectively fixedly connected to the housing 141 and respectively located above the housing 141.
In this embodiment, the placement plate 1431 can support a PCBA board, and the positioning blocks 1432 can limit and position the position of the PCBA board.
Further, the placement plate 1431 further includes a rubber pad 1433; the rubber pad 1433 and the placement plate 1431 are fixedly attached and located above the placement plate 1431.
In this embodiment, the rubber pad 1433 can prevent abrasion between the placement board 1431 and the PCBA board.
In a second aspect, the present invention further provides a method for testing a solder joint of a PCBA board, including:
s101, placing a PCBA board on an operation table;
a PCBA board is placed on the table 1.
S102, controlling the two lifting devices 21 to enable the two lifting devices 21 to drive the two supporting plates 22 to move downwards;
and controlling the two lifting devices 21 to respectively drive the two support plates 22 to move downwards.
S103, the two supporting plates 22 move downwards to drive the two pressing and holding pieces 26 and the needle base 3 to move downwards, and the PCBA plate is pressed and fixed by the two pressing and holding pieces 26;
the two supporting plates 22 move downwards to drive the two pressing and holding pieces 26 and the needle base 3 to move downwards, and the two pressing and holding pieces 26 can be firstly contacted with the PCBA to tightly press and fix the PCBA on the workbench 1.
S104, with the continuous downward movement of the supporting plate 22, the two springs 23 are stretched, meanwhile, the probes 4 on the needle seat 3 are butted with the PCBA, and whether the PCBA is in cold welding or false welding is tested.
With the continuous downward movement of the supporting plate 22, the spring 23 is stretched, and simultaneously, the needle seat 3 continues to move downward until the plurality of probes 4 on the needle seat 3 are butted with a PCBA board, and whether the PCBA board is in a cold joint or a false joint can be detected through the plurality of probes 4.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. A PCBA board welding spot test structure is characterized in that,
the PCBA board welding spot test structure comprises a workbench, two fixing mechanisms, a needle seat and a plurality of probes; the two fixing mechanisms are positioned on two sides of the workbench; the fixing mechanism comprises a lifting device, a supporting plate, a spring, a limiting plate, a sliding rod and a pressing and holding piece; the lifting device is fixedly connected with the workbench and is positioned above the workbench; the supporting plate is fixedly connected with the lifting device and is positioned on the side edge of the lifting device; the spring is fixedly connected with the supporting plate and is positioned above the supporting plate; the limiting disc is fixedly connected with the spring and is positioned above the spring; the sliding rod is fixedly connected with the limiting disc, is connected with the supporting plate in a sliding mode, and penetrates through the spring and the supporting plate; the pressing and holding piece is fixedly connected with the sliding rod and is positioned on one side of the sliding rod, which is far away from the limiting disc; the needle base is fixedly connected with the two supporting plates respectively and is positioned between the two supporting plates; the plurality of probes are respectively and fixedly connected with the needle base and are respectively positioned below the needle base.
2. The PCBA pad test structure as in claim 1,
the lifting device comprises an upright post, a guide piece and a cylinder; the upright post is fixedly connected with the workbench and is positioned above the workbench; the guide piece is connected with the upright column in a sliding manner, is fixedly connected with the supporting plate and is positioned between the upright column and the supporting plate; the air cylinder is fixedly connected with the workbench and the supporting plate respectively and is positioned between the workbench and the supporting plate.
3. A PCBA pad test structure as in claim 2,
the lifting device also comprises an anti-falling block; the anti-falling block is fixedly connected with the upright column and is positioned above the upright column.
4. A PCBA pad test structure as in claim 3,
the lifting device also comprises a limiting block; the limiting block is fixedly connected with the upright post and is positioned on the side edge of the upright post.
5. A PCBA pad test structure as in claim 4,
the workbench comprises a base, a rotating device, a bracket and two placing tables; the base is fixedly connected with the two upright posts respectively and is positioned below the two upright posts; the rotating device is fixedly connected with the base and is positioned above the base; the bracket is fixedly connected with the rotating device and is positioned above the rotating device; the two placing tables are fixedly connected with the support respectively and are positioned on two sides of the support.
6. A PCBA pad test structure as in claim 5,
the workbench also comprises two deviation preventing pieces; the two deviation preventing pieces are fixedly connected with the support respectively, are connected with the base in a sliding mode and are located between the support and the base respectively.
7. A PCBA pad test structure as in claim 6,
the deviation preventing piece comprises a connecting rod and a sliding block; the connecting rod is fixedly connected with the bracket and is positioned below the bracket; the slider with the connecting rod fixed connection, and with base sliding connection, and be located the connecting rod with between the base.
8. A PCBA board welding spot test method is applied to the PCBA board welding spot test structure as claimed in any one of claims 1-7, and is characterized by comprising the following steps:
placing the PCBA board on an operation table;
controlling the two lifting devices to drive the two supporting plates to move downwards;
the two supporting plates move downwards to drive the two pressing and holding pieces and the needle seat to move downwards, and the PCBA plate is pressed and fixed by the two pressing and holding pieces;
with the continuous move down of backup pad, two springs are stretched, and a plurality of probes on the needle file butt joint and PCBA board simultaneously test PCBA board whether have rosin joint or false solder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110907577.0A CN113655369A (en) | 2021-08-09 | 2021-08-09 | PCBA board welding spot test structure and test method thereof |
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| CN202110907577.0A CN113655369A (en) | 2021-08-09 | 2021-08-09 | PCBA board welding spot test structure and test method thereof |
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| CN115343596A (en) * | 2022-07-29 | 2022-11-15 | 宜兴兴森快捷电子有限公司 | PCBA board function test system |
| CN115343596B (en) * | 2022-07-29 | 2023-05-16 | 宜兴兴森快捷电子有限公司 | PCBA board function test system |
| CN115598509A (en) * | 2022-10-31 | 2023-01-13 | 南京高喜电子科技有限公司（Cn） | PCBA board welding spot test structure and test method thereof |
| CN116298813A (en) * | 2023-04-04 | 2023-06-23 | 南京蓝联盟科技有限公司 | PCB board scanning testing arrangement |
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Application publication date: 20211116 |