阅读说明：本技术 一种pcba插件的halt试验夹具及安装方法 (HALT test fixture for PCBA plug-in and mounting method ) 是由 肖江林 杜绍华 于 2020-07-15 设计创作，主要内容包括：本发明公开了一种PCBA插件的HALT试验夹具,包括安装底座和压块,所述安装底座上设有两个相对平行设置的用于支撑PCBA插件的支撑部,所述支撑部上设有用于放置PCBA插件的固定槽,所述压块通过紧固件安装在支撑部上,所述压块用于将PCBA插件紧固在所述支撑部上。本发明具有结构简单、通用性强、固定方式可靠且能提升HALT试验效果等优点。(The invention discloses a HALT test fixture for PCBA (printed circuit board assembly) inserts, which comprises an installation base and a pressing block, wherein two supporting parts which are arranged in parallel relatively and used for supporting the PCBA inserts are arranged on the installation base, fixing grooves for placing the PCBA inserts are arranged on the supporting parts, the pressing block is arranged on the supporting parts through fasteners, and the pressing block is used for fastening the PCBA inserts on the supporting parts. The invention has the advantages of simple structure, strong universality, reliable fixing mode, capability of improving HALT test effect and the like.)

1. The utility model provides a HALT test fixture of PCBA plug-in components, characterized in that, is including installation base (1) and briquetting (4), be equipped with two relative parallel arrangement's supporting part (2) that are used for supporting PCBA plug-in components on installation base (1), be equipped with on supporting part (2) and be used for placing PCBA plug-in components fixed slot (3), briquetting (4) are installed on supporting part (2) through the fastener, briquetting (4) are used for with PCBA plug-in components fastening on supporting part (2).

2. The PCBA insert HALT test fixture as claimed in claim 1, wherein the mounting base (1) is provided with mounting holes for mounting the fixture on a HALT box vibrating table.

3. The HALT test fixture for PCBA inserts as claimed in claim 1, characterised in that the fixing groove (3) is "L" shaped.

4. The HALT test fixture for PCBA inserts as claimed in claim 3, characterized in that the width of the bottom edge of the fixing groove (3) is 1-5 mm.

5. The PCBA insert HALT test fixture as claimed in any one of claims 1 to 4, wherein the number of press blocks (4) is two, and the single press block (4) is one integral body.

6. The HALT test fixture of the PCBA insert as recited in any one of claims 1 to 4, characterized in that the pressing block (4) is provided in plurality, the supporting portion (2) is provided with a plurality of fixing holes, the pressing block (4) is provided with a through hole, and the pressing blocks (4) are respectively mounted on the supporting portion (2) through fasteners.

7. The PCBA insert HALT test fixture of claim 6, wherein the fixing hole is a threaded hole.

8. The HALT test fixture for PCBA inserts as claimed in any one of claims 1 to 4, characterized in that the top corner of at least one side wall of the compact (4) is rounded.

9. A method for installing HALT test clamps of PCBA inserts is characterized by comprising the following steps:

step S1: fixing a mounting base (1) of the clamp on the table-board of the HALT test box;

step S2: placing the PCBA plug-in on a supporting part (2) of an installation base (1), checking whether a protruding component exists on the side surface of the PCBA plug-in, if the device does not exist, placing a pressing block (4) on the PCBA plug-in 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 cancelled, and the rest pressing blocks (4) are continuously installed;

step S3: and after the pressing block (4) is installed, the fixing condition of the PCBA plug-in is checked.

10. The method of installing a HALT test fixture for a PCBA insert of claim 9, wherein step S2 specifically comprises: placing the PCBA insert on a supporting part (2) of an installation base (1), checking whether a protruding device exists on the side surface of the PCBA insert, if the device does not exist, placing a pressing block (4) on the PCBA insert, reserving a proper gap between the pressing block (4) and the device of the PCBA, and fixing the pressing block (4) on the supporting part (2) through a fastener; if the side surface of the PCBA plug-in unit has a protruding device, the installation of the pressing block (4) at the position is cancelled, and the rest pressing blocks (4) are continuously installed.

Technical Field

The invention relates to the technical field of PCBA plug-in test clamps, in particular to a HALT test clamp of a PCBA plug-in and an installation method.

Background

The housing is one of the main structural forms of the secondary device, and the interior of the housing is formed by a large number of PCBA (printed circuit board assembly) inserts. The PCBA plug-in is used as a basic unit of the chassis, 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 very important.

At present, in the prior HALT test (high accelerated life test), when a case product is subjected to the HALT test by a PCBA alone, the fixing and signal transmission difficulties exist, and a practitioner places the whole case in a test box to perform the test, however, the test mode has the problems of vibration stress transmission attenuation, frequency spectrum change, temperature stress change rate lower than a set value, non-uniform temperature distribution and the like, so that the difference between the set value of vibration and temperature change and the value actually applied to the product is large, and the execution effect of the HALT test is influenced. Therefore, the design of a fixture which can meet the characteristics of the plug-in unit of the rail transit chassis, has universality and can solve the problem of separate fixation when the plug-in PCBA is subjected to HALT test is a technical problem to be solved by the technical personnel in the field.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention provides the HALT test fixture for the PCBA plug-in and the installation method, wherein the HALT test fixture has the advantages of simple structure, strong universality and reliable fixing mode, and can improve the HALT test effect.

In order to solve the technical problems, the invention adopts the following technical scheme:

the utility model provides a HALT test fixture of PCBA plug-in components, includes installation base and briquetting, be equipped with the supporting part that is used for supporting PCBA plug-in components of two relative parallel arrangement on the installation base, be equipped with the fixed slot that is used for placing PCBA plug-in components on the supporting part, the briquetting passes through the fastener and installs on the supporting part, the briquetting is used for with PCBA plug-in components fastening on the supporting part.

As a further improvement of the invention: and the mounting base is provided with a mounting hole for mounting the clamp on a HALT box vibration table.

As a further improvement of the invention: the fixing groove is L-shaped.

As a further improvement of the invention: the width of the bottom edge of the fixed 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 a whole.

As a further improvement of the invention: the briquetting is a plurality of, seted up a plurality of fixed orificess on the supporting part, the through-hole has been seted up on the briquetting, a plurality of briquettings are installed through the fastener respectively on the supporting part.

As a further improvement of the invention: the fixing hole is a threaded hole.

As a further improvement of the invention: the vertex angle of at least one side wall of the pressing block is arc-shaped.

The invention also provides a PCBA plug-in HALT test fixture mounting method, which comprises 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 piece on a supporting part of the mounting base, checking whether a protruding device exists on the side surface of the PCBA plug-in piece, if the device does not exist, placing the pressing block on the PCBA plug-in piece, and fixing the pressing block on the supporting part; if the device is protruded, the installation of the pressing block at the position is cancelled, and the rest pressing blocks are continuously installed;

step S3: and after the pressing block is installed, checking the fixing condition of the PCBA plug-in.

As a further improvement of the invention: step S2 specifically includes: placing the PCBA plug-in piece on a supporting part of the mounting base, checking whether a protruding device exists on the side face of the PCBA plug-in piece, if the device does not exist, placing a pressing block on the PCBA plug-in piece, reserving a proper gap between the pressing block and the device 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 cancelled, and the rest 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 the mounting base and the pressing block, the mounting base is provided with two supporting parts which are arranged in parallel relatively and used for supporting the PCBA plug-in, the supporting parts are provided with fixing grooves used for placing the PCBA plug-in, when an 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, and the middle part of the PCBA is suspended.

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 easily touch the devices on the PCBA plug-in due to the device layout problem on the PCBA plug-in, the pressing blocks at the positions can be cancelled or dismounted, and due to the fact that the pressing blocks are used for achieving fastening mounting of the PCBA plug-in, the PCBA can be guaranteed to be sufficiently fastened, the requirement of test testing is met, and the fixture is strong in universality.

3. According to the installation method of the HALT test clamp for the PCBA plug-ins, disclosed by the invention, the PCBA plug-ins are fixed in the HALT test by utilizing the clamp, so that the problem that the PCBA plug-ins cannot be independently fixed in the prior art is solved, and the PCBA plug-ins are independently fixed by the method, so that vibration energy and temperature change can be fully applied to the PCBA plug-ins, and the effect of the HALT test is effectively improved.

Drawings

FIG. 1 is a perspective view of the PCBA insert of the present invention shown without the insert being secured.

Figure 2 is a schematic view of the assembly configuration for securing a PCBA insert utilizing the present invention.

Fig. 3 is a schematic cross-sectional structure of the present invention.

FIG. 4 is a schematic diagram of the structure of the compact of the present invention.

Illustration of the drawings:

1. installing a base; 2. A support portion; 3. Fixing grooves; 4. and (7) briquetting.

Detailed Description

The invention will be described in further detail below with reference to the drawings and specific examples.

As shown in fig. 1 to 4, the invention discloses a HALT test fixture for a PCBA insert, which comprises an installation base 1 and a pressing block 4, wherein the installation base 1 is provided with two support parts 2 which are arranged in parallel relatively and used for supporting the PCBA insert, the support parts 2 are provided with fixing grooves 3 for placing the PCBA insert, the pressing block 4 is installed on the support parts 2 through fasteners, and the pressing block 4 is used for fastening the PCBA insert on the support parts 2.

The HALT test fixture for the PCBA plug-in is designed with a mounting base 1, two supporting parts 2 which are arranged in parallel relatively and used for supporting the PCBA plug-in are arranged on the mounting base 1, fixing grooves 3 used for placing the PCBA plug-in are arranged on the supporting parts 2, the PCBA plug-in is placed in the fixing grooves 3 of the supporting parts 2 when an HALT test is required, the supporting parts 2 provide supporting force for two end parts of the PCBA plug-in, and the middle part of the PCBA plug-in is suspended.

In this embodiment, the pressing blocks 4 are plural, the supporting portion 2 is provided with plural fixing holes (such as threaded holes), the pressing blocks 4 are provided with through holes, and the pressing blocks 4 are respectively installed on the supporting portion 2 through fasteners (such as bolts). Use the fixed PCBA plug-in components of a plurality of briquettings 4, to because of the device overall arrangement problem on the PCBA plug-in components leads to briquetting 4 unable installation or easy touching PCBA on the plug-in components time, can cancel the installation of this department briquetting 4 or lift off the briquetting 4 of this department, owing to have the fastening installation that a plurality of briquettings 4 realized the PCBA plug-in components, consequently can guarantee the abundant fastening of PCBA, satisfy the demand of experimental test, 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 is designed in an integral structure, so that the installation and the disassembly are more convenient and faster.

In this embodiment, the vertex angle of at least one lateral wall of briquetting 4 is arc, and during the installation, the arc vertex angle of briquetting 4 is towards the PCBA plug-in components, through arc 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 a mounting hole for mounting the fixture on the HALT box vibration table. The mounting base 1 is securely mounted to the HALT tank vibration table by fasteners (e.g., bolts) through the mounting holes so that the mounting base 1 and the table top of the HALT tank vibration table do not move relative to each other.

In this embodiment, the fixing groove 3 is L-shaped. Fixed slot 3 has all been seted up to the one end that two parallel arrangement's supporting part 2 are close to each other, and further, in preferred embodiment, the width range on fixed slot 3 base is 1 ~ 5 mm.

The embodiment also provides a method for installing the HALT test fixture of the PCBA plug-in unit, which comprises the following steps:

step S1: fixing a mounting base 1 of the clamp on the table-board of the HALT test box;

step S2: placing the PCBA plug-in on a supporting part 2 of an installation base 1, checking whether a protruding device exists on the side surface of the PCBA plug-in, if the device does not exist, placing a pressing block 4 on the PCBA plug-in and fixing the pressing block on the supporting part 2; if a protruded device exists, the installation of the pressing block 4 at the position is cancelled, and the rest 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.

In the installation method of the HALT test clamp for the PCBA plug-in unit in the embodiment, the PCBA plug-in unit is fixed in the HALT test by using the clamp, so that the problem that the PCBA plug-in unit cannot be independently fixed in the prior art is solved, and the PCBA plug-in unit is independently fixed by using the installation method, so that vibration energy and temperature change can be fully applied to the PCBA plug-in unit, and the effect of the HALT test is effectively improved.

In this embodiment, step S2 specifically includes: placing the PCBA plug-in on a supporting part 2 of an installation base 1, checking whether a protruding device exists on the side surface of the PCBA plug-in, if the device does not exist, placing a pressing block 4 on the PCBA plug-in, reserving a proper gap between the pressing block 4 and the device of the PCBA, and fixing the pressing block 4 on the supporting part 2 through a fastener; if the side surface of the PCBA plug-in unit has a protruding device, the installation of the pressing block 4 at the position is cancelled, and the rest pressing blocks 4 are continuously installed. When the pressing block 4 is installed, a proper gap is reserved between the pressing block 4 and the PCBA plug-in component, and the pressing block 4 can be effectively prevented from colliding with the PCBA plug-in component 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-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may be made by those skilled in the art without departing from the principle of the invention.