Astronavigation cable assembly protection device and preparation method thereof

Abstract

The invention provides an astronavigation cable assembly protection device and a preparation method thereof. The astronavigation cable assembly protection device comprises a printed board, a protective shell and a protective sleeve, wherein the printed board is a surface-mounted bonding pad printed board and comprises N pairs of interconnected surface-mounted bonding pads, and lead wires in a first cable and a second cable which need to be interconnected are pasted and welded on the corresponding surface-mounted bonding pads of the printed board, so that electrical performance connection between the lead wires is realized; n is greater than or equal to the maximum number of the lead wires in the interconnected first cable and second cable; the printed board welded with the lead wires is packaged in the protective shell, the first cable and the second cable extend out of a wire outlet of the protective shell, and the protective shell fixes and protects the printed board and the connecting lead wires; and the protective sleeve coats the protective shell and is used for coating and protecting the printed board and the protective shell.

Description

technical field [0001] The invention relates to an aerospace cable transfer device and method, in particular to an aerospace cable assembly protection module and a preparation method thereof, belonging to the technical field of aerospace power electronic product assembly, and can also be extended to the field of civilian power electronic transfer modules. Background technique [0002] With the continuous development of the deep space exploration project, the development and deployment of planetary probes are vigorously carried out. Spacecraft are exposed to extreme temperatures and high radiation intensity environments for a long time, and the requirements for the reliability of aerospace cables are increasing year by year. As an important part of the spacecraft, the types of cable assemblies are increasing day by day. Different assembly forms correspond to different index requirements, and the processing technology is becoming increasingly complex. [0003] Traditional cab...

AI Technical Summary

Problems solved by technology

As an important part of the spacecraft, cable assemblies are increasing in variety. Different assembly forms correspond to different index requirements, and the processing technology is becoming more and more complex.

[0003] Traditional cable assembly mostly adopts crimping and welding, and is mostly used in the scene of conventional wires, but it cannot meet the assembly specifications of ultra-thin wires

For example, the self-contained wire of the electrical connector selected for the shock sensor signal in the low-frequency cable network is a single-core wire with a core diameter of only 0.16mm, while the diameter of the solder cup or terminal of the electrical connector is mostly about 1mm, which is extremely thin. Wires cannot be directly assembled with electrical connectors

At this stage, most of the ultra-fine wires are lap-welded with the outgoing wires of the electrical connectors, and the risk of fracture at the solder joints is high during use, which does not meet the assembly process specifications for low-frequency cable networks for spacecraft

[0004] The traditional cable bonding technology is mainly used in wire products with similar wire diameters. If the wire diameter gap is too large, the long-term reliability of the wire bonding will be insufficient, and the current carrying capacity will be limited.

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