CN111896778B - HALT test fixture for PCBA plug-in and mounting method - Google Patents
HALT test fixture for PCBA plug-in and mounting method Download PDFInfo
- Publication number
- CN111896778B CN111896778B CN202010680120.6A CN202010680120A CN111896778B CN 111896778 B CN111896778 B CN 111896778B CN 202010680120 A CN202010680120 A CN 202010680120A CN 111896778 B CN111896778 B CN 111896778B
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- pcba
- plug
- test fixture
- pressing block
- halt test
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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
-
- 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
- G01R31/003—Environmental or reliability tests
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a HALT test fixture for PCBA plug-ins, which comprises a mounting base and a pressing block, wherein two supporting parts which are arranged in parallel and are used for supporting the PCBA plug-ins are arranged on the mounting base, a fixing groove used for placing the PCBA plug-ins is formed in the supporting parts, the pressing block is arranged on the supporting parts through a fastener, and the pressing block is used for fastening the PCBA plug-ins on the supporting parts. The invention has the advantages of simple structure, strong universality, reliable fixing mode, capability of improving the HALT test effect and the like.
Description
Technical Field
The invention relates to the technical field of PCBA plug-in test fixtures, in particular to a HALT test fixture for a PCBA plug-in and an installation method.
Background
The chassis is one of the main structural forms of the secondary equipment, and the interior of the chassis is composed of a large number of PCBA (printed circuit board assembly, printed board assembly) plug-ins. The PCBA plug-in is taken as a basic unit of the case, and is related to the realization of functions of secondary equipment protection, sampling, communication, man-machine communication and the like and the safe operation of rail transit, so that the reliability and the stability of the PCBA plug-in are important.
At present, in the existing HALT test (high accelerated life test), for chassis products, because of the difficulty in fixing and signal transmission when the PCBA of the plug-in unit is independently tested by the HALT test, practitioners all place the whole chassis in the test box to test, however, the test mode has the problems of vibration stress transmission attenuation or frequency spectrum change, temperature stress change rate lower than a set value, uneven temperature distribution and the like, so that the set value of vibration and temperature change is greatly different from the value actually applied to the product, and the execution effect of the HALT test is affected. Therefore, designing a fixture which can meet the characteristics of the plug-in components of the chassis of the rail transit, has universality and can solve the independent fixing problem of the plug-in PCBA when the HALT test is carried out is a technical problem to be solved urgently by the technicians in the field.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides the HALT test fixture and the mounting method of the PCBA plug-in, which have the advantages of simple structure, strong universality, reliable fixing mode and capability of improving the HALT test effect.
In order to solve the technical problems, the invention adopts the following technical scheme:
the HALT test fixture for the PCBA plug-in comprises a mounting base and a pressing block, wherein two supporting parts which are arranged in parallel and used for supporting the PCBA plug-in are arranged on the mounting base, a fixing groove used for placing the PCBA plug-in is formed in the supporting part, the pressing block is mounted on the supporting part through a fastening piece, and the pressing block is used for fastening the PCBA plug-in on the supporting part.
As a further improvement of the invention: the mounting base is provided with a mounting hole for mounting the clamp on the HALT box vibrating table.
As a further improvement of the invention: the fixed slot is L-shaped.
As a further improvement of the invention: the width of the bottom edge of the fixing groove is 1 mm-5 mm.
As a further improvement of the invention: the number of the pressing blocks is two, and the single pressing block is an integer.
As a further improvement of the invention: the pressing blocks are multiple, the supporting portions are provided with multiple fixing holes, the pressing blocks are provided with through holes, and the pressing blocks are installed on the supporting portions through fasteners respectively.
As a further improvement of the invention: the fixing hole is a threaded hole.
As a further improvement of the invention: the apex angle of at least one side wall of the pressing block is arc-shaped.
The invention also provides a HALT test fixture mounting method of the PCBA plug-in, comprising the following steps:
step S1: fixing the mounting base of the clamp on the table top of the HALT test box;
step S2: placing the PCBA plug-in on a supporting part of the mounting base, checking whether a protruding device exists on the side surface of the PCBA plug-in, if no protruding device exists, placing a pressing block on the PCBA plug-in, and fixing the pressing block on the supporting part; if the device protrudes, the installation of the pressing block at the position is canceled, and the other pressing blocks are continuously installed;
step S3: after the press block is installed, the fixing condition of the PCBA plug-in unit is checked.
As a further improvement of the invention: the step S2 specifically comprises the following steps: placing the PCBA plug-in on a supporting part of the mounting base, checking whether protruding devices exist on the side face of the PCBA plug-in, if not, placing a pressing block on the PCBA plug-in, reserving a proper gap between the pressing block and the devices of the PCBA, and fixing the pressing block on the supporting part through a fastener; if the side surface of the PCBA plug-in is provided with a protruding device, the installation of the pressing block at the position is canceled, and the other pressing blocks are continuously installed
Compared with the prior art, the invention has the advantages that:
1. the HALT test fixture for the PCBA plug-in is designed with a mounting base and a pressing block, wherein two supporting parts which are arranged in parallel and used for supporting the PCBA plug-in are arranged on the mounting base, fixing grooves used for placing the PCBA plug-in are formed in the supporting parts, when a HALT test is required to be carried out, the PCBA is placed in the fixing grooves of the supporting parts, the supporting parts provide supporting force for two end parts of the PCBA plug-in, the middle part of the PCBA is suspended, and the mounting mode is similar to the mounting stress mode of the PCBA plug-in a chassis, so that vibration energy and temperature change can be ensured to be fully applied to the PCBA plug-in, and the effect of the HALT test is effectively improved.
2. According to the HALT test fixture for the PCBA plug-in, the PCBA plug-in is mounted on the supporting part and fastened through the pressing blocks, the pressing blocks are designed to be multiple, when the pressing blocks cannot be mounted or devices on the PCBA plug-in are easily touched due to the problem of device layout on the PCBA plug-in, the mounting of the pressing blocks at the position or the dismounting of the pressing blocks at the position can be canceled, and the plurality of pressing blocks are used for realizing the fastening mounting of the PCBA plug-in, so that the PCBA plug-in can be ensured to be fully fastened, the test requirements are met, and the fixture is high in universality.
3. According to the mounting method of the HALT test fixture for the PCBA plug-in, the PCBA plug-in is fixed in the HALT test by utilizing the fixture, the problem that the PCBA plug-in cannot be independently fixed in the prior art is solved, and the PCBA plug-in is independently fixed by the method, so that vibration energy and temperature change can be fully applied to the PCBA plug-in, and the effect of the HALT test is effectively improved.
Drawings
Fig. 1 is a schematic perspective view of the PCBA insert of the present invention when not secured.
Figure 2 is a schematic view of an assembly configuration for securing a PCBA insert using the present invention.
Fig. 3 is a schematic cross-sectional view of the present invention.
Fig. 4 is a schematic structural view of the compact of the present invention.
Legend description:
1. a mounting base; 2. A support part; 3. A fixing groove; 4. and (5) briquetting.
Detailed Description
The invention will be described in further detail with reference to the drawings and the specific examples.
As shown in fig. 1 to 4, the invention discloses a HALT test fixture for a PCBA plug-in unit, which comprises a mounting base 1 and a pressing block 4, wherein two supporting parts 2 which are arranged in parallel and are used for supporting the PCBA plug-in unit are arranged on the mounting base 1, a fixing groove 3 used for placing the PCBA plug-in unit is arranged on the supporting parts 2, the pressing block 4 is arranged on the supporting parts 2 through a fastener, and the pressing block 4 is used for fastening the PCBA plug-in unit on the supporting parts 2.
The HALT test fixture for the PCBA plug-in is designed with the mounting base 1, the mounting base 1 is provided with two supporting parts 2 which are arranged in parallel and are used for supporting the PCBA plug-in, the supporting parts 2 are provided with the fixing grooves 3 used for placing the PCBA plug-in, when the HALT test is required, the PCBA plug-in is placed in the fixing grooves 3 of the supporting parts 2, the supporting parts 2 provide supporting force for two end parts of the PCBA plug-in, the middle part of the PCBA plug-in is suspended, the mounting mode is similar to the mounting stress mode of the PCBA plug-in a chassis, vibration energy and temperature change can be ensured to be fully applied to the PCBA plug-in, and the effect of the HALT test is effectively improved.
In this embodiment, the number of the pressing blocks 4 is plural, the supporting portion 2 is provided with a plurality of fixing holes (such as threaded holes), the pressing blocks 4 are provided with through holes, and the pressing blocks 4 are respectively mounted on the supporting portion 2 through fasteners (such as bolts). Use a plurality of briquetting 4 fixed PCBA plug-ins, when to the device on the unable installation of briquetting 4 or the easy touching PCBA plug-in components that lead to because of the device overall arrangement problem on the PCBA plug-in components, can cancel the briquetting 4 of this department installation of briquetting 4 or lift off briquetting 4 of this department, because have a plurality of briquetting 4 to realize the fastening installation of PCBA plug-ins, consequently can guarantee that the PCBA is fully fastened, satisfy test's demand, and this anchor clamps commonality is strong. In other embodiments, the pressing block 4 can be designed as a whole, and the pressing block 4 adopts an overall structural design, so that the installation and the disassembly are more convenient and faster.
In this embodiment, the apex angle of at least one lateral wall of briquetting 4 is convex, and during the installation, the convex apex angle of briquetting 4 is towards PCBA plug-in components, through convex design, reduces the influence of right angle design to the device on the PCBA plug-in components.
In this embodiment, the mounting base 1 is provided with mounting holes for mounting the jig on the HALT box vibration table. The mounting base 1 is firmly mounted to the HALT box vibrating table through the mounting holes by means of fasteners such as bolts so that the mounting base 1 and the table top of the HALT box vibrating table do not move relatively.
In this embodiment, the fixing groove 3 is "L" shaped. The two parallel support parts 2 are provided with a fixing groove 3 at one end close to each other, and further, in a preferred embodiment, the width of the bottom edge of the fixing groove 3 ranges from 1mm to 5mm.
The embodiment also provides a method for installing the HALT test fixture of the PCBA plug-in, which comprises the following steps:
step S1: fixing the mounting base 1 of the clamp on the table top of the HALT test box;
step S2: placing the PCBA on the supporting part 2 of the mounting base 1, checking whether the side surface of the PCBA has protruding devices, if not, placing the pressing block 4 on the PCBA and fixing the pressing block on the supporting part 2; if the device protrudes, the installation of the pressing block 4 at the position is canceled, and the other pressing blocks 4 are continuously installed;
step S3: after the press block 4 is installed, the fixing condition of the PCBA plug-in is checked.
According to the mounting method of the HALT test fixture of the PCBA plug-in, the PCBA plug-in is fixed in the HALT test by utilizing the fixture, the problem that the PCBA plug-in cannot be independently fixed in the prior art is solved, the PCBA plug-in is independently fixed by the method, vibration energy and temperature change can be ensured to be fully applied to the PCBA plug-in, and the effect of the HALT test is effectively improved.
In this embodiment, step S2 specifically includes: placing the PCBA plug-in on the supporting part 2 of the mounting base 1, checking whether protruding devices exist on the side face of the PCBA plug-in, if not, placing the pressing block 4 on the PCBA plug-in, reserving a proper gap between the pressing block 4 and the PCBA devices, and fixing the pressing block 4 on the supporting part 2 through a fastener; if protruding devices are arranged on the side face of the PCBA plug-in, the installation of the pressing block 4 at the position is canceled, and the other pressing blocks 4 are continuously installed. When the pressing block 4 is installed, a proper gap is reserved between the pressing block 4 and a PCBA plug-in device, so that the pressing block 4 can be effectively prevented from colliding with the PCBA plug-in device during test vibration.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the invention without departing from the principles thereof are intended to be within the scope of the invention as set forth in the following claims.
Claims (9)
1. A HALT test fixture installation method for a PCBA insert, comprising:
step S1: fixing a mounting base (1) of the clamp on a table top of a HALT test box;
step S2: placing the PCBA plug-in on two supporting parts (2) which are arranged in parallel and opposite to each other on the mounting base (1), wherein a fixing groove (3) for placing the PCBA plug-in is formed in the supporting part (2), checking whether a protruding device exists on the side face of the PCBA plug-in or not, if no protruding device exists, placing a pressing block (4) on the PCBA plug-in, reserving a proper gap between the pressing block (4) and the PCBA device, and fixing the pressing block (4) on the supporting part (2) through a fastener; if protruding devices are arranged on the side face of the PCBA plug-in, the installation of the pressing block (4) at the position is canceled, and the other pressing blocks (4) are continuously installed;
step S3: after the press block (4) is installed, the fixing condition of the PCBA plug-in unit is checked.
2. A test fixture based on a HALT test fixture mounting method of a PCBA plug-in unit according to claim 1, characterized by comprising a mounting base (1) and a pressing block (4), wherein two supporting parts (2) which are arranged in parallel and are used for supporting the PCBA plug-in unit are arranged on the mounting base (1), a fixing groove (3) used for placing the PCBA plug-in unit is arranged on the supporting part (2), the pressing block (4) is mounted on the supporting part (2) through a fastener, and the pressing block (4) is used for fastening the PCBA plug-in unit on the supporting part (2).
3. HALT test fixture for PCBA inserts according to claim 2, characterized in that the mounting base (1) is provided with mounting holes for mounting the fixture on a HALT tank vibrating table.
4. The HALT test fixture of PCBA inserts according to claim 2, characterized in that the fixing groove (3) is "L" -shaped.
5. The HALT test fixture for PCBA inserts according to claim 4, characterized in that the width of the bottom edge of the fixing groove (3) is 1 mm-5 mm.
6. HALT test fixture for PCBA inserts according to any of the claims 2 to 5, characterized in that the compacts (4) are two and the single compact (4) is one piece.
7. The HALT test fixture for PCBA inserts according to any one of claims 2 to 5 wherein the number of press blocks (4) is plural, the support portion (2) is provided with a plurality of fixing holes, the press blocks (4) are provided with through holes, and the plurality of press blocks (4) are respectively mounted on the support portion (2) by fasteners.
8. The HALT test fixture of a PCBA insert according to claim 7, wherein the securing holes are threaded holes.
9. HALT test fixture for PCBA inserts according to any of the claims 2 to 5, characterized in that the apex angle of at least one side wall of the compact (4) is circular arc-shaped.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010680120.6A CN111896778B (en) | 2020-07-15 | 2020-07-15 | HALT test fixture for PCBA plug-in and mounting method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010680120.6A CN111896778B (en) | 2020-07-15 | 2020-07-15 | HALT test fixture for PCBA plug-in and mounting method |
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| CN111896778A CN111896778A (en) | 2020-11-06 |
| CN111896778B true CN111896778B (en) | 2023-05-26 |
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| CN111896778A (en) | 2020-11-06 |
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