CN-224203258-U - Core circuit board batch screening test fixture for spaceflight

CN224203258UCN 224203258 UCN224203258 UCN 224203258UCN-224203258-U

Abstract

The utility model relates to a core circuit board batch screening test fixture for spaceflight, which relates to the technical field of spaceflight electronic equipment testing, and comprises an upper shell and a lower shell, wherein the upper shell is covered on the lower shell, eight sunken grooves are formed in the bottom surfaces of the inner parts of the upper shell and the lower shell, supporting limit protrusions are arranged on the sunken grooves close to the edge openings of the bottom surfaces, three positioning holes are formed in the edge openings of each sunken groove, one end of the inner bottom surfaces of the upper shell and the inner bottom surface of the lower shell are respectively provided with a penetrating vacuum air suction hole and a needle-discharging line hole, DB25 connecting holes communicated with the needle-discharging line holes are formed in the side surfaces of the upper shell and the side surfaces of the lower shell, screw holes are formed in the two sides of the DB25 connecting holes, and glue-dispensing holes are formed in the outer side openings of the needle-discharging line holes. The test fixture has the advantages that the test fixture greatly improves the test efficiency and has great popularization.

Inventors

WANG WEI
HUANG ZHIWEI
YANG GUANG
DUAN YONGQIANG
ZHOU ZONGBAO
TAO QING
LIU GUANCHEN
SHENG YANTING

Assignees

上海中辰新威航天科技有限公司

Dates

Publication Date: 20260505
Application Date: 20250519

Claims (5)

1. The core circuit board batch screening test fixture for the aerospace is characterized by comprising an upper shell (1) and a lower shell (2), wherein the upper shell (1) is covered on the lower shell (2); Eight sinking grooves (3) are formed in the bottom surfaces of the upper shell (1) and the lower shell (2), supporting limit protrusions (4) are arranged on the sinking grooves (3) close to the edge openings of the bottom surfaces, and three positioning holes (5) are formed in the edge openings of each sinking groove (3); One end of the inner bottom surfaces of the upper shell (1) and the lower shell (2) are respectively provided with a through vacuum air suction hole (6) and a pin arranging wiring hole (7); DB25 connecting holes (8) communicated with the pin-arranging wiring holes (7) are formed in the side faces of the upper shell (1) and the lower shell (2), screw holes (9) are formed in two sides of each DB25 connecting hole (8), and dispensing holes (10) are formed in the outer side edge openings of the pin-arranging wiring holes (7).
2. The core circuit board batch screening test fixture for spaceflight according to claim 1, wherein an upper end rectangular groove (11) and a lower end rectangular groove (12) are respectively arranged at two ends of the inner bottom surfaces of the upper shell (1) and the lower shell (2).
3. The batch screening test fixture for the core circuit boards for spaceflight according to claim 1, wherein a circle of sealing grooves (13) are formed at the edge of the lower shell (2), and sealing rings are arranged in the sealing grooves (13).
4. The batch screening test fixture for core circuit boards for spaceflight according to claim 1, wherein eight sunken grooves (3) are respectively formed in the inner bottom surfaces of the upper shell (1) and the lower shell (2), the eight sunken grooves are respectively formed in two sides of the bottom surface, and four sunken grooves (3) are uniformly formed in each side of the bottom surface from top to bottom at intervals.
5. The batch screening test fixture for core circuit boards for aerospace according to claim 1, wherein the upper shell (1) and the lower shell (2) are made of aluminum 6061 material.

Description

Core circuit board batch screening test fixture for spaceflight Technical Field The utility model relates to the technical field of aerospace electronic equipment testing, in particular to a batch screening test fixture for core circuit boards for aerospace. Background Core circuit boards for aerospace use are subjected to extreme temperature environments (e.g., -150 ℃ to +150 ℃) during launch and operation, and therefore must pass stringent temperature screening tests to ensure their reliability. The traditional temperature screening method is usually carried out aiming at a single circuit board, has low efficiency and can not meet the requirements of large-scale aerospace production tasks. In addition, the traditional method has the defects in the aspects of temperature uniformity, test data synchronism and the like, and high-efficiency screening of batch circuit boards is difficult to realize. The foregoing description is provided for general background information and does not necessarily constitute prior art. Disclosure of utility model The utility model aims to provide a core circuit board batch screening test fixture for spaceflight, which greatly improves the test efficiency and has great popularization. The utility model provides a core circuit board batch screening test fixture for spaceflight, which comprises an upper shell and a lower shell, wherein the upper shell is covered on the lower shell, eight sunken grooves are formed in the bottom surfaces inside the upper shell and the lower shell, supporting limit protrusions are arranged on the sunken grooves close to side openings of the bottom surfaces, three positioning holes are formed in the side openings of each sunken groove, one end of the inner bottom surfaces of the upper shell and the lower shell is provided with a penetrating vacuum air suction hole and a needle discharge line hole, DB25 connecting holes communicated with the needle discharge line holes are formed in the side surfaces of the upper shell and the lower shell, screw holes are formed in the two sides of the DB25 connecting holes, and glue dispensing holes are formed in the outer side openings of the needle discharge line holes. According to the technical scheme, the test fixture is used in the process that 16 test circuit boards are firstly placed on supporting limit protrusions on an upper shell and a lower shell by a tester respectively, positions are adjusted to enable the back surfaces of the circuit boards to be open in an up-down manner, meanwhile, the circuit boards are fixed through three locating holes by screws, S2, a DB25 connector and a pin are in flying connection, the pin penetrates through the DB25 connecting hole to the pin wire hole, the DB25 screws are fixed at screw holes on two sides of the DB25 connecting hole, S3, glue dispensing sealing is conducted on glue dispensing holes on the outer side edges of the pin wire hole, the pin is fixed, the pin is exposed on the pin wire hole, S4, the fixed circuit boards are connected to the pin through wires, S5, the upper shell and the lower shell are covered by a cover, the screws are connected, and S6, vacuum pumping is conducted at the vacuum pumping hole. Further, an upper end rectangular groove and a lower end rectangular groove are respectively arranged at two ends of the inner bottom surfaces of the upper shell and the lower shell. Further, a circle of sealing groove is arranged at the edge of the lower shell, and a sealing ring is arranged in the sealing groove. Further, eight sinking grooves are formed in the inner bottom surfaces of the upper shell and the lower shell and are respectively positioned on two sides of the bottom surface, and four sinking grooves are formed in each side of the bottom surface from top to bottom at equal intervals. Further, the upper shell and the lower shell are made of aluminum 6061 material. The test fixture for batch screening of the core circuit boards for spaceflight has exquisite structural design, can facilitate workers to install 16 circuit boards at one time and uniformly output the 16 circuit boards from a DB25 port in a cable connection mode, ensures airtight performance through rectangular dispensing holes, can better simulate space vacuum environment through air suction, is made of aluminum 6061 materials, has relatively low density, enables the manufactured test fixture for the circuit boards to be lighter in weight, is good in uniformity of aluminum 6061 materials, is relatively consistent in thermophysical properties of all parts in a heating or radiating process, can enable the overall temperature distribution of the fixture to be relatively uniform, ensures the consistency of the internal test environment of the fixture, reasonably arranges test space through exquisite structural design and optimization, ensures test environment, greatly improves test efficiency, has great popularization, is convenient to screen out which circuit board is out in a centralized