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首页> 美国卫生研究院文献>Micromachines >High Aspect Ratio Thin-Walled Structures in D2 Steel through Wire Electric Discharge Machining (EDM)
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High Aspect Ratio Thin-Walled Structures in D2 Steel through Wire Electric Discharge Machining (EDM)

机译：通过电线放电加工（EDM）的高纵横比D2钢中的薄壁结构

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摘要

Thin structures are often required for several engineering applications. Although thick sections are relatively easy to produce, the cutting of thin sections poses greater challenges, particularly in the case of thermal machining processes. The level of difficulty is increased if the thin sections are of larger lengths and heights. In this study, high-aspect-ratio thin structures of micrometer thickness (117–500 µm) were fabricated from D2 steel through wire electrical discharge machining. Machining conditions were kept constant, whereas the structure (fins) sizes were varied in terms of fin thickness (FT), fin height (FH), and fin length (FL). The effects of variation in FT, FH, and FL were assessed over the machining errors (FT and FL errors) and structure formation and its quality. Experiments were conducted in a phased manner (four phases) to determine the minimum possible FT and maximum possible FL that could be achieved without compromising the shape of the structure (straight and uniform cross-section). Thin structures of smaller lengths (1–2 mm long) can be fabricated easily, but, as the length exceeds 2 mm, the structure formation loses its shape integrity and the structure becomes broken, deflected, or deflected and merged at the apex point of the fins.
机译：几种工程应用通常需要薄结构。虽然厚的部分相对容易产生，但切割的切割姿势更大挑战，特别是在热加工过程的情况下。如果薄部分具有较大长度和高度，则难度提高。在本研究中，通过电线电放电加工从D2钢制造千分尺厚度（117-500μm）的高纵横比薄结构。加工条件保持恒定，而结构（翅片）尺寸在翅片厚度（FT），翅片高度（FH）和翅片长度（FL）方面变化。通过加工误差（FT和FL误差）和结构形成及其质量来评估FT，FH和FL变化的影响及其质量。实验以分阶段（四个相）进行，以确定可以在不损害结构形状的情况下实现的最小可能的FT和最大可能的流动（直链和均匀的横截面）。较小长度（1-2毫米长）的薄结构可以容易地制造，但随着长度超过2mm，结构形成失去其形状完整性，并且结构变得破裂，偏转或偏转并在顶点点处合并鳍。

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