Antenna housing near-net forming mold and forming method

Abstract

The invention relates to an antenna housing near-net forming mold and a forming method. The forming mold is formed by a main mold, an external mold, a long depression bar and a short depression bar. The forming process comprises the following steps of (1) cleaning the mold; (2) duplicating the external mold; (3) shaping a honeycomb; (4) paving antenna housing materials; (4) forming a workpiece; and (5) demolding, and carrying out post-processing. According to the antenna housing near-net forming mold and the forming method provided by the invention, through using the variable-cross-section depression bars, the low-pressure forming of a high-pressure forming antenna housing is realized, and the occurrence of the phenomena such as high porosity and low fiber content of the workpiece in a conventional antenna housing low-pressure forming technology is avoided; through the combined use of an integrated metal male mold and the external mold and the high-accuracy guarantee of the mold, the near-net-dimension and high-precision forming of the antenna housing is realized, and the occurrence of the phenomena of secondary machining damage and corner gum deposit in an existing forming methodis avoided; and through a vacuum bag co-curing forming technology, the low-cost production of the antenna housing is realized.

Description

technical field [0001] The invention belongs to the three technical fields of machinery, materials and electromagnetism, and relates to the molding technology of radome, in particular to a near-net molding mold and molding method for radome, which is mainly applied to radome systems requiring high dimensional accuracy of inner and outer surfaces. Background technique [0002] The radome is a functional structural part that protects the antenna system or the entire microwave system inside the hood from external damage and destruction. It has the functions of wave penetration, load bearing, impact resistance, heat insulation, and weather resistance. [0003] At present, the radome molding methods mainly include autoclave method, vacuum bag pressing method and molding method. The autoclave method refers to placing the composite material blank in an autoclave and forming the radome through high temperature and high pressure molding. The vacuum bag pressing method refers to vacu...

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Problems solved by technology

[0004] (1) When the radome is formed by the autoclave method, the dimensional accuracy of the non-mold contact surface of the radome is poor, and the product has secondary machining or manual grinding processes, which may easily cause fiber breakage and honeycomb damage. It is not suitable for thin-walled sandwich structure antennas cover molding

[0005] (2) When the radome is formed by vacuum bag pressing method, the forming pressure of the radome is relatively small (≤0.1MPa), and the product has disadvantages such as high porosity and low fiber content, so it is not suitable for radome molding with high forming pressure

[0006] (3) When the radome is formed by molding method, the molding pressure at the side wall of the radome cavity is small and the transmission is uneven, and the product has defects such as fiber wrinkles, glue accumulation, and incomplete compaction, which is not suitable for the structure with an inner cavity Radome Molding

[0007] The radome of a certain product has a cavity sandwich structure, the thickness of the inner and outer skins is 0.3mm, and the thickness is thin. The parts need to meet the requirements of more than 95% wave transmission rate, 40g high overload and high dimensional accuracy. Trial requirements

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