Method for producing millimeter wave antenna slot array sheet

Abstract

The invention discloses a method for producing a millimeter wave antenna slot array sheet. The production method selects tooling equipment suitable for clamping a large-area super-thin sheet, can be used for realizing the reliable clamping of a slot array sheet during high-speed machining by matching with a corresponding clamping pressure plate and a reasonable clamping method, and reasonably selects a micro-diameter cutting tool formed by machining a corresponding material as well as a system tool environment and related parameters which conform to the machining of a slot array so as to ensure that a high-speed and high-precision machining process can be realized. The production method can be used for realizing the production of the slot array in the large-area super-thin sheet, and the high-speed machining of high-precision multi-slot graphs.

Description

technical field [0001] The invention relates to the technical field of precision machining of thin plates and ultra-thin plates, in particular to a method for manufacturing a thin plate of a millimeter-wave antenna slot array. Background technique [0002] Some radar systems will use advanced millimeter-wave radar guidance technology. The function of the antenna system determines the complexity and variability of the structural design, as well as the difficulty and complexity of its process design and manufacture. In particular, the wavelength of this type of antenna has entered the millimeter wave stage, and the size of the antenna structure has been further reduced, while the relative position accuracy has been greatly improved, and its manufacturing difficulty has also doubled. [0003] Such as figure 1 As shown, the millimeter-wave antenna slot array sheet 11 is a key component in the flat panel slot antenna subsystem, and has the characteristics of thin wall thickness,...

AI Technical Summary

Problems solved by technology

For a thin plate with a plate thickness of 0.5mm, an outer diameter of φ230mm, a gap width of only 0.5mm, and an accuracy requirement of ±0.01mm, if it is processed according to the previous thin plate, the workpiece blank is fastened to the tooling with screws. In the process of high-speed processing of thick thin plates, the center and the outer edge are kept flat, the force is uniform, and the slit array grooves reach the required dimensional accuracy, which is impossible at all, and the yield of qualified products is extremely low; if the micro-slit laser Processing, this method does not require special tools and fixtures, but it has extremely high requirements for equipment. It is found through microscopic projection that laser processing is easy to form irregular ablation marks on the processing surface, and the roughness of the inner surface of the workpiece does not meet the design requirements. Although Although this type of processing belongs to micro-stress processing, which can eliminate the influence of tools and tooling on processing, the product still fails to meet the use requirements in terms of current processing status.

Millimeter-wave antenna slot array thin plate parts have poor rigidity. Due to residual stress, clamping force, cutting force, cutting heat and other factors during processing, thin plate structural parts are prone to processing deformation and cutting vibration, resulting in processing errors, thus It is difficult to guarantee the processing accuracy and surface quality of the parts, and in severe cases, the parts will be scrapped

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