Development of a planar helix slow-wave structure based on ball-grid array technology

Babaeihaselghobi, Akbar; Ghavifekr, Habib Badri

doi:10.1080/09205071.2020.1787235

Cited by 1 publication

(1 citation statement)

References 11 publications

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“…The deepand-narrow microgrooved structure has become a research hotspot in mechanical field because it can reduce workpiece weight and material consumption under the premise of ensuring its stiffness and strength. Deep-and-narrow micro-groove is a critical functional structure of the Terahertz (THz) slow-wave structure [1,2], microforming die and micro-heat exchanger [3], etc. The common characteristics of these structures are [4,5]: (1) material diversity (including metal, ceramics, and composite materials); (2) complex geometric structure with large-aspect-ratio and small scale; (3) high machined quality and consistency; and (4) strict machining accuracy and high sidewall perpendicularity, etc.…”

Section: Introductionmentioning

confidence: 99%

Experimental Research on Deep-And-Narrow Micromilled Grooves Using a Self-Fabricated PCD Micro-Cutter

Han

Hao

et al. 2021

Micromachines

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Deep-and-narrow micro-grooves are the common functional structures of miniature parts. The fabrication of the micromilled grooves with high quality and accuracy is the essential guarantee of the causative performance for these miniature parts, and micromilling is the most versatile process to machine such micro-grooves. However, micromilling technology is a highly tool-dependent process, and the commercial carbide micromilling cutter has shown obvious deficiencies in terms of rapid tool wear and inferior machined quality during the machining process. In this paper, a polycrystalline diamond (PCD) micromilling cutter with a large-aspect-ratio (LAR) was designed and prepared by the self-proposed hybrid fabrication method of laser and precision grinding. Micromilling experiments on oxygen-free copper were conducted, and the carbide micromilling cutter was selected in the comparative experiments. The variations of milling forces and specific energy were analyzed through the parameter experiments. Then, the surface quality, machined accuracy and tool wear were further investigated. Results showed that the PCD micromilling cutter with an aspect ratio of 3.25 was successfully manufactured by the proposed hybrid method. The self-fabricated PCD micromilling cutter presented remarkable superiority in terms of the surface quality, machined accuracy, and tool wear when preparing deep-and-narrow micro-grooves. Finally, a satisfactory micromilled groove with an aspect ratio of 2.5 was achieved with the self-fabricated LAR PCD cutter under the optimized conditions.

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